JP7764234B2 - Oral care products and molded oral care products - Google Patents

Description

The present invention relates to a molded oral care product and an oral care product.

Multicolor molded products are known as an example of molded oral care products. Multicolor molded products include, for example, a primary molded portion and a secondary molded portion. Patent Document 1 shows a toothbrush, which is an example of an oral care product.

Japanese Patent Application Laid-Open No. 2018-198796

In molded products that include a primary molded portion and a secondary molded portion, it is preferable that the position of the secondary molded portion relative to the primary molded portion is stable.

The molded oral care product of the present invention includes a primary molded part including a part to be coated, a secondary molded part including a coating part that coats the part to be coated, and an exposed structure including one or more penetration parts that penetrate the coating part, the penetration parts being provided in the primary molded part and including an exposed surface exposed to the coating part, the part to be coated including a first end, a second end, and an intermediate part in the axial direction, and the exposed structure including at least one of a first type penetration part that is the penetration part located at least at the first end, a second type penetration part that is the penetration part located at least at the second end, and a third type penetration part that is the penetration part located at least at the intermediate part.

This molded product provides the following advantages, for example: Because the portion to be coated in the primary molded part is covered by the covering portion of the secondary molded part, the area where the primary molded part and secondary molded part join is increased. The position of the secondary molded part relative to the primary molded part is stabilized. During the secondary molding process, in which the secondary molded part is formed, the exposed surface of the penetration part comes into contact with the mold. Because the force that the primary molded part receives from the resin material corresponding to the secondary molded part is transmitted to the mold, deformation of the primary molded part during the secondary molding process is suppressed.

In one example of the molded oral care product, the penetration portion is configured to protrude from the outer surface of the part to be covered.

This molded product offers the following advantages, for example: The exposed surface of the penetration part is more likely to come into proper contact with the mold.

In one example of the molded oral care product, the exposure structure includes a plurality of the first type penetration portions.

This molded product offers the following advantages, for example: It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the exposure structure includes a plurality of the second type penetration portions.

This molded product offers the following advantages, for example: It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the total volume of all the first type penetrating parts is in the range of 1 ^mm3 or more.

This molded product provides the following benefits, for example: It reduces the likelihood of deformation or damage to the first-type penetration part during the secondary molding process. It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the total volume of all the first type penetrating parts is within the range of 100 mm3 ^or less.

This molded product provides the following benefits, for example: The first-class penetration part becomes less noticeable.

In one example of the molded oral care product, the total volume of all the second type penetrating parts is in the range of 1 ^mm3 or more.

This molded product provides the following benefits, for example: It reduces the likelihood of deformation or damage to the second-type penetration part during the secondary molding process. It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the total volume of all the second type penetrating parts is within the range of 100 ^mm3 or less.

This molded product provides the following benefits, for example: The second-class penetration part becomes less noticeable.

In one example of the molded oral care product, the sum of the volume of all the first type penetration parts and the volume of all the second type penetration parts is in the range of 2 ^mm3 or more.

This molded product provides the following advantages, for example: It is less likely that at least one of the first-type penetration portion and the second-type penetration portion will be deformed or damaged during the secondary molding process. It is more effective at suppressing deformation of the primary molded portion during the secondary molding process.

In one example of the molded oral care product, the total volume of all the first type penetration parts and all the second type penetration parts is within a range of 200 ^mm3 or less.

This molded product provides the following advantages, for example: At least one of the first-type penetration portion and the second-type penetration portion becomes less noticeable.

In one example of the molded oral care product, the total volume of all the third type penetrating parts is in the range of 1 ^mm3 or more.

This molded product provides the following benefits, for example: The third-class penetration part is less likely to deform or break during the secondary molding process. It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the total volume of all the third type penetrating parts is within the range of 100 mm3 ^or less.

This molded product provides the following benefits, for example: The third-class penetration part becomes less noticeable.

In one example of the molded oral care product, the primary molded part includes a recess that includes an arrangement space, and the arrangement space is configured to allow a portion of the secondary molded part to be placed therein.

This molded product offers the following advantages, for example: It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the primary molded portion includes a protrusion that is covered by the covering portion.

This molded product offers the following advantages, for example: It is more effective at suppressing deformation of the primary molded part during the secondary molding process.

In one example of the molded oral care product, the material of the secondary molded portion includes a transparent resin or a translucent resin.

This molded product offers the following benefits, for example: It is expected that the design of the molded product will be improved.

In one example of the molded oral care product, the material of the primary molded portion includes polyacetal, polypropylene, or saturated polyester resin.

This molded product offers the following benefits, for example: Improved wear resistance of the primary molded portion.

In one example of the molded oral care product, the molded product is a toothbrush.

This molded product can provide the following benefits, for example: The toothbrush can provide the various benefits mentioned above.

The oral care products of the present invention include molded articles of the oral care products.

This oral care product can provide the following effects, for example: It provides effects similar to those achieved by molded oral care products.

The molded oral care product and oral care product of the present invention stabilize the position of the secondary molded portion relative to the primary molded portion.

FIG. 2 is a front view of the toothbrush according to the first embodiment. FIG. 2 is a side view of the toothbrush of FIG. 1 . FIG. 2 is a front view of the molded product of FIG. 1 . FIG. 2 is a side view of the molded product of FIG. 1 . FIG. 4 is an enlarged view of a portion of the molded product of FIG. 3 . FIG. 2 is an enlarged view of a portion of the molded product of FIG. 1 . FIG. 4 is a front view of the primary molding portion of FIG. 3 . FIG. 4 is a side view of the primary molding portion of FIG. 3 . FIG. FIG. FIG. FIG. FIG. 10 is an enlarged view of the ZA portion of FIG. 9 . FIG. 11 is an enlarged view of a portion ZB in FIG. 10 . FIG. 12 is an enlarged view of the ZC portion of FIG. 11 . FIG. 13 is an enlarged view of the ZD portion of FIG. 12 . FIG. 10 is an enlarged view of the ZE portion of FIG. 9 . FIG. 11 is an enlarged view of the ZF portion of FIG. FIG. 12 is an enlarged view of the ZG portion of FIG. Cross-sectional view of the molded product parallel to the third reference plane (1). Cross-sectional view of the molded product parallel to the third reference plane (2). Cross-sectional view of the molded product parallel to the third reference plane (3). Cross-sectional view of the molded product parallel to the second reference plane (1). Cross-sectional view of the molded product parallel to the second reference plane (2). FIG. 10 is a front view of the first group of penetrations. FIG. 10 is a side view of the first group of penetrations. FIG. 2 is a front view of a first group of penetrations and corresponding coverings. FIG. 2 is a side view of a first group of feedthroughs and corresponding coverings. FIG. 10 is a front view of the second group of penetrations. FIG. 10 is a side view of the second group of penetrations. FIG. 10 is a front view of a second group of penetrations and corresponding coverings. FIG. 10 is a side view of a second group of feedthroughs and corresponding coverings. FIG. 10 is a front view of the third group of penetrations. FIG. 3 is a side view of the third group of penetrations. FIG. 10 is a front view of a third group of penetrations and corresponding coverings. FIG. 10 is a side view of a third group of feedthroughs and corresponding coverings. FIG. 13 is a cross-sectional view of a molded product according to a sixth embodiment. FIG. 13 is a cross-sectional view of a molded product according to a seventh embodiment. FIG. 20 is a cross-sectional view of a molded product according to an eighth embodiment. FIG. 13 is a cross-sectional view of a molded product according to a ninth embodiment. FIG. 23 is a cross-sectional view of a molded product according to a tenth embodiment. FIG. 23 is a cross-sectional view of a molded product according to an eleventh embodiment. FIG. 23 is a plan view of a molded product according to a twelfth embodiment. FIG. 23 is a plan view of a molded product according to the thirteenth embodiment. Cross-sectional view of a molded product of the fourteenth embodiment. Cross-sectional view (1) of a molded product of the fifteenth embodiment. Cross-sectional view (2) of a molded product of the fifteenth embodiment. Cross-sectional view (3) of a molded product of the fifteenth embodiment. Cross-sectional view of a molded product of the sixteenth embodiment. Cross-sectional view of a molded product of the seventeenth embodiment. FIG.

(Oral care product description)
Examples of oral care products include toothbrushes, interdental brushes, mucosal care brushes, floss with holders, and check mirrors.

The oral care product includes, for example, a molded article and a functional component. The molded article includes a main body. The configuration of the main body can be selected arbitrarily. The main body includes, for example, a handle, a neck, and a head. The handle is configured to be suitable for gripping with the hand. The neck is provided between the handle and the head. The neck is connected to the handle and the head. The head is configured to support the functional component.

Molded products may be single-color molded products or multi-color molded products. An example of a multi-color molded product is a two-color molded product. A two-color molded product, for example, includes a primary molded part and a secondary molded part.

Examples of materials for single-color molded products include hard thermoplastic resins, soft thermoplastic resins, and soft thermosetting resins. The material for single-color molded products is selected depending on, for example, the function of the oral care product.

When a rigid thermoplastic resin is selected as the material for the single-color molded product, the material for the single-color molded product may contain one type of rigid thermoplastic resin, or two or more types of rigid thermoplastic resin.

When a soft thermoplastic resin is selected as the material for the single-color molded product, the material for the single-color molded product may contain one type of soft thermoplastic resin, or two or more types of soft thermoplastic resin.

When a soft thermosetting resin is selected as the material for the single-color molded product, the material for the single-color molded product may contain one type of soft thermosetting resin, or two or more types of soft thermosetting resin.

Examples of materials for the primary molded part include hard thermoplastic resin, soft thermoplastic resin, and soft thermosetting resin. The material for the primary molded part is selected depending on, for example, the function of the oral care product.

If a rigid thermoplastic resin is selected as the material for the primary molded portion, the material for the primary molded portion may contain one type of rigid thermoplastic resin, or two or more types of rigid thermoplastic resin.

If a soft thermoplastic resin is selected as the material for the primary molded portion, the material for the primary molded portion may contain one type of soft thermoplastic resin, or two or more types of soft thermoplastic resin.

If a soft thermosetting resin is selected as the material for the primary molding part, the material for the primary molding part may contain one type of soft thermosetting resin, or two or more types of soft thermosetting resin.

Examples of materials for the secondary molded portion include hard thermoplastic resins, soft thermoplastic resins, and soft thermosetting resins. The material for the secondary molded portion is selected depending on, for example, the function of the oral care product.

If a rigid thermoplastic resin is selected as the material for the secondary molded portion, the material for the secondary molded portion may contain one type of rigid thermoplastic resin, or two or more types of rigid thermoplastic resin.

If a soft thermoplastic resin is selected as the material for the secondary molded portion, the material for the secondary molded portion may contain one type of soft thermoplastic resin, or two or more types of soft thermoplastic resin.

If a soft thermosetting resin is selected as the material for the secondary molded portion, the material for the secondary molded portion may contain one type of soft thermosetting resin, or two or more types of soft thermosetting resin.

Examples of rigid thermoplastic resins include olefin resins, polyamide resins, saturated polyester resins, polymethyl methacrylate, cellulose propionate, thermoplastic polyurethane, polycarbonate, polyacetal, and ABS (Acrylonitrile Butadiene Styrene) resin.

Examples of olefin-based resins include propylene-based polymers and ethylene-based polymers.

Examples of propylene-based polymers include homopolymers, random copolymers, and block copolymers.

Examples of ethylene-based polymers include homopolymers, random copolymers, and block copolymers.

Examples of saturated polyester resins include polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, and polycyclohexylene dimethylene terephthalate.

Examples of thermoplastic resins classified based on their properties related to visible light transmittance include opaque resins, translucent resins, and transparent resins.

Examples of transparent resins include saturated polyester resins, acrylic resins, polycarbonates, polystyrene resins, AS (Acrylonitrile Styrene) resins, and silicone resins.

An example of a soft thermoplastic resin is a thermoplastic elastomer.

Examples of thermoplastic elastomers include polystyrene-based thermoplastic elastomers, polyolefin-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, polyurethane-based thermoplastic elastomers, polyester-based thermoplastic elastomers, polyamide-based thermoplastic elastomers, and polybutadiene-based thermoplastic elastomers.

An example of a soft thermosetting resin is a thermosetting elastomer.
Examples of thermosetting elastomers include silicone-based thermosetting resins, urethane-based thermosetting resins, fluorine-based thermosetting resins, synthetic rubbers, and natural rubbers.

Examples of synthetic rubber include styrene-butadiene rubber, butadiene rubber, chloroprene rubber, isoprene rubber, butyl rubber, ethylene-propylene rubber, acrylonitrile-butadiene rubber, silicone rubber, fluororubber, acrylic rubber, urethane rubber, polysulfide rubber, chlorinated butyl rubber, and epichlorohydrin rubber.

The functional component has a specific function related to oral care. The functional component is provided on the molded product. For example, the functional component is provided on the head of the main body.

An example of a functional component of a toothbrush is the tuft. Examples of functional components of an interdental brush are the tuft and rubber brush. Examples of functional components of a mucosal care brush are the tuft, rubber brush and sponge brush. An example of a functional component of a floss holder is dental floss. An example of a functional component of a check mirror is a mirror.

For example, a molded oral care product may have a first axial direction, a second axial direction, a first width direction, a second width direction, a first thickness direction, and a second thickness direction. The first axial direction is opposite to the second axial direction. The first width direction is opposite to the second width direction. The first thickness direction is opposite to the second thickness direction.

The axial direction is a general term for the first axial direction and the second axial direction. The axial direction is parallel to the X axis. The width direction is a general term for the first width direction and the second width direction. The width direction is parallel to the Y axis. The thickness direction is a general term for the first thickness direction and the second thickness direction. The thickness direction is parallel to the Z axis. The central axis of the molded oral care product is parallel to the axial direction.

The X-axis and Y-axis define a first reference plane. The X-axis and Z-axis define a second reference plane. The Y-axis and Z-axis define a third reference plane.

For example, a molded oral care product has a defined radial inner direction and a radial outer direction. The radial inner direction and the radial outer direction are parallel to the third reference plane. The radial inner direction is the direction toward the central axis of the molded oral care product. The radial outer direction is the direction opposite to the radial inner direction. The radial direction collectively refers to the radial inner direction and the radial outer direction.

For example, a first circumferential direction and a second circumferential direction are defined for a molded oral care product. The first circumferential direction is the direction along the outer shape of the cross section perpendicular to the central axis of the molded product. The second circumferential direction is the direction opposite to the first circumferential direction. The circumferential direction collectively refers to the first circumferential direction and the second circumferential direction.

Perspectives regarding oral care products are defined, for example, as follows: A front view is a perspective when the oral care product is viewed from a first reference plane in a second thickness direction. A rear view is a perspective when the oral care product is viewed from a first reference plane in a first thickness direction. A first side view is a perspective when the oral care product is viewed from a second reference plane in a second width direction. A second side view is a perspective when the oral care product is viewed from a second reference plane in a first width direction. A side view collectively refers to the first side view and the second side view.

The thickness of a molded product is defined, for example, as follows: The thickness of a molded product is indicated by the diameter of the cross section perpendicular to the central axis of the molded product.

(First embodiment)
1 and 2. In this embodiment, the oral care product 10 is a toothbrush 10A. The toothbrush 10A includes a molded article 20 and a functional member 30. The molded article 20 is, for example, a two-color molded article.

The molded product 20 includes a main body 100. The configuration of the main body 100 can be selected arbitrarily. The configuration of the main body 100 is not limited to the configuration illustrated. The main body 100 includes, for example, a handle 110, a neck 120, and a head 130. The central axis of the main body 100 defines the central axis of the molded product 20.

The main body 100 includes a first end 100A and a second end 100B. The first end 100A is located in a first axial direction relative to the axial center of the main body 100. The second end 100B is located in a second axial direction relative to the axial center of the main body 100.

The main body 100 includes a first side portion 100C and a second side portion 100D. The first side portion 100C is located in a first width direction relative to the center of the main body 100 in the width direction. The second side portion 100D is located in a second width direction relative to the center of the main body 100 in the width direction.

The configuration of the handle 110 can be selected arbitrarily. The configuration of the handle 110 is not limited to the configuration shown in the example. The handle 110 is configured to be suitable for gripping. The head 130 is configured to support the functional member 30.

The handle 110 includes a first end 110A and a second end 110B. The first end 110A is located in a first axial direction relative to the axial center of the handle 110. The second end 110B is located in a second axial direction relative to the axial center of the handle 110. The second end 110B constitutes the second end 100B of the main body 100.

The handle 110 includes a first side portion 110C and a second side portion 110D. The first side portion 110C is located in a first width direction relative to the center of the handle 110 in the width direction. The second side portion 110D is located in a second width direction relative to the center of the handle 110 in the width direction. The first side portion 110C constitutes the first side portion 100C of the main body 100. The second side portion 110D constitutes the second side portion 100D of the main body 100.

The configuration of the neck 120 can be selected arbitrarily. The configuration of the neck 120 is not limited to the configuration shown in the example. The neck 120 is provided between the handle 110 and the head 130. The neck 120 is connected to the handle 110. The neck 120 is connected to the head 130.

The neck 120 includes a first end 120A and a second end 120B. The first end 120A is located in a first axial direction relative to the axial center of the neck 120. The second end 120B is located in a second axial direction relative to the axial center of the neck 120. The second end 120B of the neck 120 connects to the first end 110A of the handle 110.

The neck 120 includes a first side 120C and a second side 120D. The first side 120C is located in a first width direction relative to the center of the neck 120 in the width direction. The second side 120D is located in a second width direction relative to the center of the neck 120 in the width direction.

The configuration of the head 130 can be selected arbitrarily. The configuration of the head 130 is not limited to the illustrated configuration. In one example, the head 130 is thin. The minimum thickness of the head 130 is equal to or less than the minimum thickness of the neck 120. In the illustrated example, the minimum thickness of the head 130 is smaller than the minimum thickness of the neck 120. The head 130 includes a plurality of openings 131. Holes 132 are provided in the openings 131. The holes 132 open to the front surface 133 of the head 130.

The head 130 includes a first end 130A and a second end 130B. The first end 130A is located in a first axial direction relative to the axial center of the head 130. The first end 130A constitutes the first end 100A of the body 100. The second end 130B is located in a second axial direction relative to the axial center of the head 130. The second end 130B of the head 130 connects to the first end 120A of the neck 120.

The head 130 includes a first side portion 130C and a second side portion 130D. The first side portion 130C is located in a first width direction relative to the center of the head 130 in the width direction. The first side portion 130C constitutes the first side portion 100C of the main body 100. The second side portion 130D is located in a second width direction relative to the center of the head 130 in the axial direction. The second side portion 130D constitutes the second side portion 100D of the main body 100.

The configuration of the functional member 30 can be selected arbitrarily. The configuration of the functional member 30 is not limited to the configuration illustrated. In one example, the functional member 30 includes a plurality of tufts. Some of the tufts are positioned in the holes 132 and fixed to the head 130.

See Figures 3 to 6. The configuration of the molded article 20 can be selected arbitrarily. The configuration of the molded article 20 is not limited to the illustrated configuration. In one example, the molded article 20 includes a primary molded portion P and a secondary molded portion Q. The outer surface 20F of the molded article 20 includes the outer surface PF of the primary molded portion P and the outer surface QF of the secondary molded portion Q.

The material for the primary molding portion P is selected taking into consideration, for example, its softening and hardening properties, its hardness and softness properties, and its transparency.

In terms of softening and hardening properties, for example, a thermoplastic resin is selected. In terms of hardness and softness properties, for example, a hard resin is selected. In terms of transparency, for example, an opaque resin is selected.

In one example, a hard, opaque thermoplastic resin is selected as the material for the primary molded portion P. Examples of hard, opaque thermoplastic resins that may be selected include polyacetal, polypropylene, or saturated polyester resins.

The material for the secondary molded portion Q is selected taking into consideration, for example, its softening and hardening properties, its hardness and softness properties, and its transparency.

In terms of softening and hardening properties, for example, a thermoplastic resin is selected. In terms of hardness and softness properties, for example, a hard resin is selected. In terms of transparency, for example, a transparent resin or a translucent resin is selected.

In one example, a hard and transparent thermoplastic resin or a hard and translucent thermoplastic resin is selected as the material for the secondary molded portion Q. Examples of hard and transparent thermoplastic resins that can be selected include AS resin, ABS resin, or polycarbonate. Examples of hard and translucent thermoplastic resins that can be selected include polypropylene or polyethylene.

In one example, the molded article 20 includes a pressed structure 200. The pressed structure 200 is configured so that it can be pressed by an ejector pin. During the extrusion process in which the molded article 20 is removed from the mold, the pressed portion of the molded article 20 that constitutes the pressed structure 200 is pressed by one or more ejector pins.

In one example of a method for manufacturing the molded product 20, the extrusion process includes a primary extrusion process and a secondary extrusion process. In the primary extrusion process, the pressed portion of the primary molded portion P is pressed by the ejector pin. In the secondary extrusion process, the pressed portion of the secondary molded portion Q is pressed by the ejector pin.

The configuration of the pressable structure 200 can be selected arbitrarily. The configuration of the pressable structure 200 is not limited to the illustrated configuration. In one example, the pressable structure 200 includes a specific portion 210 and a protruding portion 220.

The configuration of the specific portion 210 can be selected arbitrarily. The configuration of the specific portion 210 is not limited to the configuration illustrated. In one example, the specific portion 210 includes a pressed portion. The specific portion 210 is provided on the head 130. The specific portion 210 includes the front surface 133 of the head 130.

The configuration of the protrusion 220 can be selected arbitrarily. The configuration of the protrusion 220 is not limited to the configuration shown in the example. In one example, the protrusion 220 includes a pressed portion. The protrusion 220 is configured to protrude relative to the main body 100. The protrusion 220 is configured so that it can be pressed by an ejector pin.

In one example, the protrusion 220 is configured as a portion intended to be removed from the molded product 20 (hereinafter referred to as the "portion intended to be removed 300"). Figure 6 shows the second end 100B of the main body 100 from which the protrusion 220 has been removed.

The following provides an example of the relationship between the protrusion 220 and the gate of the molded product 20. In the first example, the protrusion 220 is included in the primary molding part P. The protrusion 220 is configured as a separate part from the gate of the primary molding part P. In the second example, the protrusion 220 is included in the primary molding part P. The protrusion 220 includes the gate of the primary molding part P.

In the third example, the protrusion 220 is included in the secondary molding portion Q. The protrusion 220 is configured as a separate part from the gate of the secondary molding portion Q. In the fourth example, the protrusion 220 is included in the secondary molding portion Q. The protrusion 220 includes the gate of the secondary molding portion Q.

See Figures 7 and 8. The configuration of the primary molding portion P can be selected arbitrarily. The configuration of the primary molding portion P is not limited to the configuration shown in the example. In one example, the primary molding portion P includes a primary body component PA and a protrusion 220. The protrusion 220 is connected to the primary body component PA. The protrusion 220 is configured to protrude relative to the primary body component PA.

The configuration of the primary body component PA can be selected arbitrarily. The configuration of the primary body component PA is not limited to the configuration shown in the example. The primary body component PA forms the main body 100 of the molded article 20. In one example, the primary body component PA includes a primary handle component P10, a neck 120, and a head 130.

The primary main body component PA includes a coating target portion PC. The coating target portion PC is the portion that is coated by the coating portion Q40 of the secondary molded portion Q. The configuration of the coating target portion PC can be selected arbitrarily. The configuration of the coating target portion PC is not limited to the configuration shown in the example.

The following are examples of the configuration of the coated part PC. In a first example, the coated part PC includes at least a portion of the primary handle component P10. In a second example, the coated part PC includes at least a portion of the neck 120. In a third example, the coated part PC includes at least a portion of the head 130. In a fourth example, the coated part PC includes at least two of the configurations of the first to third examples.

In one example, the portion to be coated PC extends in the axial direction. The portion to be coated PC includes a first end portion PCA, a second end portion PCB, and an intermediate portion PCC. The first end portion PCA is located in a first axial direction relative to the center of the portion to be coated PC in the axial direction. The second end portion PCB is located in a second axial direction relative to the center of the portion to be coated PC in the axial direction.

The intermediate portion PCC is located between the first end portion PCA and the second end portion PCB. The intermediate portion PCC includes a first intermediate portion PCCA and a second intermediate portion PCCB. The first intermediate portion PCCA is located in the first axial direction relative to the center of the portion to be coated PC in the axial direction. The first intermediate portion PCCA is connected to the first end portion PCA. The second intermediate portion PCCB is located in the second axial direction relative to the center of the portion to be coated PC in the axial direction. The second intermediate portion PCCB is connected to the second end portion PCB.

The configuration of the primary handle component P10 can be selected arbitrarily. The configuration of the primary handle component P10 is not limited to the configuration shown in the example. The primary handle component P10 constitutes the handle 110.

The primary handle component P10 includes a first end P10A and a second end P10B. The first end P10A is located in a first axial direction relative to the axial center of the primary handle component P10. The second end P10B is located in a second axial direction relative to the axial center of the primary handle component P10.

The first end P10A constitutes the first end 110A of the handle 110. The second end P10B constitutes the second end 110B of the handle 110. The first end P10A connects to the second end 120B of the neck 120. The first end P10A is thinner than the second end 120B of the neck 120.

The primary handle component P10 includes a first side portion P10C and a second side portion P10D. The first side portion P10C is located in a first width direction relative to the center of the primary handle component P10 in the width direction. The second side portion P10D is located in a second width direction relative to the center of the primary handle component P10 in the width direction.

In one example, the primary body component PA includes a step P11. The step P11 is provided between the second end 120B of the neck 120 and the first end P10A of the primary handle component P10. The step P11 includes an intermediate surface P12. The intermediate surface P12 is the surface between the upper part of the step P11 and the lower part of the step P11.

The intermediate plane P12 is provided between the outer surface PF of the second end 120B of the neck 120 and the outer surface PF of the first end P10A of the primary handle component P10. The intermediate plane P12 is, for example, a plane. The intermediate plane P12 is, for example, parallel to the third reference plane.

In one example, the primary handle component P10 includes one or more protrusions P13. In the illustrated example, the primary handle component P10 includes multiple protrusions P13.

Multiple protrusions P13 are provided on the first end P10A. The multiple protrusions P13 protrude from the outer surface PF of the first end P10A in a direction perpendicular to the central axis of the main body 100. The multiple protrusions P13 are arranged at intervals around the central axis of the handle 110.

In one example, the primary handle component P10 includes a constricted portion P20. The constricted portion P20 includes a first end P20A, a second end P20B, and an intermediate portion P20C.

The first end P20A is located in a first axial direction relative to the intermediate portion P20C. The second end P20B is located in a second axial direction relative to the intermediate portion P20C. The intermediate portion P20C is located between the first end P20A and the second end P20B in the axial direction.

The first end P20A constitutes the thick portion of the constricted portion P20. The second end P20B constitutes the thick portion of the constricted portion P20. The middle portion P20C constitutes the thin portion of the constricted portion P20. The thickness of the constricted portion P20 tapers in the axial direction from the first end P20A and second end P20B toward the middle portion P20C. The thinnest portion of the constricted portion P20 is included in the middle portion P20C.

In one example, the primary handle component P10 includes a tapered portion P30. The tapered portion P30 is located in the second axial direction relative to the constricted portion P20. The tapered portion P30 is connected to the constricted portion P20. The central axis of the tapered portion P30 is coaxial with the central axis of the constricted portion P20. The outer diameter of the tapered portion P30 decreases in the second axial direction.

The tapered portion P30 includes a first end P30A and a second end P30B. The first end P30A is located in a first axial direction relative to the center of the tapered portion P30 in the axial direction. The second end P30B is located in a second axial direction relative to the center of the tapered portion P30 in the axial direction. The first end P30A connects to the second end P20B of the constricted portion P20.

In one example, the primary handle component P10 includes a main body protrusion P40. The main body protrusion P40 is connected to the tapered portion P30. The main body protrusion P40 protrudes in the second axial direction relative to the tapered portion P30. The central axis of the main body protrusion P40 is coaxial with the central axis of the constricted portion P20. The main body protrusion P40 is thinner than the narrowest portion of the constricted portion P20.

The main body protrusion P40 includes a first end P40A and a second end P40B. The first end P40A is located in a first axial direction relative to the center of the main body protrusion P40 in the axial direction. The second end P40B is located in a second axial direction relative to the center of the main body protrusion P40 in the axial direction. The first end P40A connects to the second end P30B of the tapered portion P30.

In one example, the shape of the main body protrusion P40 is tapered. The outer diameter of the main body protrusion P40 decreases in the second axial direction. The maximum outer diameter of the main body protrusion P40 is smaller than the thickness of the narrowest part of the constricted portion P20.

The second end P10B of the primary handle component P10 can be selected arbitrarily. The configuration of the second end P10B is not limited to the configuration shown in the example.

In an example in which the primary handle component P10 includes a tapered portion P30 and a main body protrusion P40, the second end P10B is formed by the tapered portion P30 and the main body protrusion P40.

In an example where the primary handle component P10 includes a tapered portion P30 and does not include a main body protrusion P40, the second end P10B is formed by the tapered portion P30.

See Figures 3 and 4. The configuration of the secondary molded portion Q can be selected arbitrarily. The configuration of the secondary molded portion Q is not limited to the configuration shown in the example. In one example, the secondary molded portion Q includes a secondary main body component QA.

The configuration of the secondary body component QA can be selected arbitrarily. The configuration of the secondary body component QA is not limited to the illustrated configuration. The secondary body component QA constitutes the main body 100 of the molded product 20. In one example, the secondary body component QA includes a secondary handle component Q10.

The configuration of the secondary handle component Q10 can be selected arbitrarily. The configuration of the secondary handle component Q10 is not limited to the illustrated configuration. The secondary handle component Q10 is joined to the outer surface PF of the primary handle component P10. The secondary handle component Q10 is configured to cover at least a portion of the outer surface PF of the primary handle component P10.

The secondary handle component Q10 forms the gripped portion of the handle 110. The material of the secondary handle component Q10 is different from the material of the primary handle component P10.

The secondary handle component Q10 includes a first end Q10A and a second end Q10B. The first end Q10A is located in a first axial direction relative to the axial center of the secondary handle component Q10. The second end Q10B is located in a second axial direction relative to the axial center of the secondary handle component Q10.

The first end Q10A of the secondary handle component Q10 includes an end surface Q10E. The end surface Q10E is, for example, a flat surface. The end surface Q10E is, for example, parallel to the third reference plane. The end surface Q10E faces the intermediate surface P12 of the step portion P11 of the primary body component PA. The end surface Q10E contacts the intermediate surface P12 of the step portion P11.

The secondary handle component Q10 includes a first side portion Q10C and a second side portion Q10D. The first side portion Q10C is located in a first width direction relative to the center of the secondary handle component Q10 in the width direction. The second side portion Q10D is located in a second width direction relative to the center of the secondary handle component Q10 in the width direction. The first side portion Q10C constitutes the first side portion 100C of the main body 100. The second side portion Q10D constitutes the second side portion 100D of the main body 100.

In one example, the secondary handle component Q10 includes a first component Q11 and a second component Q12. The second component Q12 is positioned in a second axial direction relative to the first component Q11.

The first end P10A, constricted portion P20, and tapered portion P30 of the primary handle component P10 are arranged inside the first component Q11. The first component Q11 covers the outer surface PF of the first end P10A, the outer surface PF of the constricted portion P20, and the outer surface PF of the tapered portion P30.

The main body protrusion P40 of the primary handle component P10 is disposed inside the second component Q12. The second component Q12 covers the side surface of the outer surface PF of the main body protrusion P40.

In one example, the secondary handle component Q10 includes a constricted portion Q20. The constricted portion Q20 includes a first end Q20A, a second end Q20B, and an intermediate portion Q20C.

The first end Q20A is located in the first axial direction relative to the intermediate portion Q20C. The second end Q20B is located in the second axial direction relative to the intermediate portion Q20C. The first end Q20A constitutes the thick portion of the constricted portion Q20. The second end Q20B constitutes the thick portion of the constricted portion Q20. The intermediate portion Q20C constitutes the thin portion of the constricted portion Q20.

The thickness of the constricted portion Q20 tapers in the axial direction from the first end Q20A and second end Q20B toward the middle portion Q20C. The narrowest part of the constricted portion Q20 is included in the middle portion Q20C.

The first end Q20A of the constricted portion Q20 is configured to correspond to the first end P20A of the constricted portion P20 of the primary handle component P10. The first end Q20A of the constricted portion Q20 covers the outer surface PF of the first end P20A of the constricted portion P20.

The second end Q20B of the constricted portion Q20 is configured to correspond to the second end P20B of the constricted portion P20 of the primary handle component P10. The second end Q20B of the constricted portion Q20 covers the outer surface PF of the second end P20B of the constricted portion P20.

The middle portion Q20C of the constricted portion Q20 is configured to correspond to the middle portion P20C of the constricted portion P20 of the primary handle component P10. The middle portion Q20C of the constricted portion Q20 covers the outer surface PF of the middle portion P20C of the constricted portion P20.

In one example, the secondary handle component Q10 includes a tapered portion Q30. The tapered portion Q30 includes a portion of the first component Q11 and a second component Q12. The outer diameter of the tapered portion Q30 decreases in the second axial direction. The tapered portion Q30 includes a first end Q30A and a second end Q30B.

The first end Q30A is located in the first axial direction relative to the center of the tapered portion Q30 in the axial direction. The second end Q30B is located in the second axial direction relative to the center of the tapered portion Q30 in the axial direction. The first end Q30A is connected to the second end Q20B of the constricted portion Q20.

The second end Q10B of the secondary handle component Q10 can be selected arbitrarily. The configuration of the second end Q10B is not limited to the configuration shown in the example. In an example in which the secondary handle component Q10 includes a tapered portion Q30, the second end Q10B is formed by the tapered portion Q30.

The configuration of the second end 110B of the handle 110 can be selected arbitrarily. In one example, the second end 110B is configured by the second end P10B of the primary handle component P10 and the second end Q10B of the secondary handle component Q10.

Refer to Figures 5 and 6. The protrusion 220 is connected to the second end 110B of the handle 110. The protrusion 220 protrudes in the second axial direction relative to the second end 110B of the handle 110. The central axis of the protrusion 220 is coaxial with the central axis of the handle 110.

In one example, the protrusion 220 is connected to the primary handle component P10. The protrusion 220 protrudes in the second axial direction from the second end P10B of the primary handle component P10.

The protrusion 220 includes a first end 220A and a second end 220B. The first end 220A is located in a first axial direction relative to the axial center of the protrusion 220. The second end 220B is located in a second axial direction relative to the axial center of the protrusion 220. The first end 220A connects to the second end P10B of the primary handle component P10. In one example, the first end 220A connects to the second end P40B of the main body protrusion P40.

In one example, the protrusion 220 is a cylinder. Examples of cylinders include a circular cylinder, a rectangular prism, and an anti-rectangular prism. In the example shown, the protrusion 220 is a cylinder.

The thickness of the protrusion 220 can be selected arbitrarily. The thickness of the protrusion 220 is not limited to the thickness exemplified. In one example, the protrusion 220 is thinner than the main body 100. The outer diameter of the protrusion 220 is smaller than the minimum thickness of the head 130. The outer diameter of the protrusion 220 is smaller than the outer diameter of the narrowest part of the constricted portion P20.

In the molded product 20 from which the protrusion 220 has been removed, the primary molded portion P includes the tip portion P50. The tip portion P50 is the portion of the protrusion 220 that remains in the molded product 20 without being removed.

The tip portion P50 is connected to the second end P40B of the main body protrusion P40. The tip portion P50 protrudes in the second axial direction relative to the main body protrusion P40. The tip portion P50 includes an end surface P51.

The tip portion P50 is not covered by the secondary handle component Q10. The tip portion P50 is located outside the secondary handle component Q10. The tip portion P50 protrudes in the second axial direction relative to the second end Q10B of the secondary handle component Q10.

In one example, the end surface P51 is a curved surface that bulges in the second axial direction. The end surface P51 forms the outer surface PF of the second end 110B of the handle 110.

See Figures 1 to 4. In one example, the molded article 20 includes a decorative portion 400. The decorative portion 400 is configured to decorate the molded article 20. The configuration of the decorative portion 400 can be selected arbitrarily. The configuration of the decorative portion 400 is not limited to the configuration shown in the example. In one example, the decorative portion 400 is provided in at least one of the primary molded portion P and the secondary molded portion Q.

Methods for forming the decorative portion 400 are classified, for example, into primary decoration and secondary decoration. Primary decoration is a method for forming the decorative portion 400 during molding of the molded product 20. Secondary decoration is a method for forming the decorative portion 400 after molding of the molded product 20.

Examples of primary decoration include transferring decorative films, laminating decorative films, laminating soft skin materials, laminating other skin materials, in-mold coating, in-mold reacting, molding colored layers, and transferring specific surfaces formed on molds for decoration.

Examples of secondary decoration include transferring decorative film, laminating decorative film, laminating soft skin materials, laminating other skin materials, painting, printing, plating, vacuum deposition, electrostatic flocking, laser marking, chemical coating, and dyeing.

The decorative portion 400 provided in the primary molding portion P includes at least one of a decorative portion 400 formed by primary decoration and a decorative portion 400 formed by secondary decoration.

In a molded product 20 where the protrusion 220 has not been removed, the decorative portion 400 is provided in the following areas, for example:

In an example in which the decorative portion 400 is provided on the primary molded portion P, the decorative portion 400 is provided on at least one of the primary main body constituent portion PA and the protruding portion 220.

In an example in which the decorative portion 400 is provided on the primary body component PA, the decorative portion 400 is provided on at least one of the primary handle component P10, the neck 120, and the head 130.

In an example in which the decorative portion 400 is provided on the primary handle component P10, the decorative portion 400 is provided on at least one of the first end P10A, the second end P10B, the first side P10C, the second side P10D, the step P11, the protrusion P13, the constricted portion P20, the tapered portion P30, and the main body protrusion P40.

In the molded product 20 with the protrusion 220 removed, the decorative portion 400 is provided in the following areas, for example:

In an example where the decorative section 400 is provided in the primary molding section P, the decorative section 400 is provided in the primary main body component PA.

In an example in which the decorative portion 400 is provided on the primary body component PA, the decorative portion 400 is provided on at least one of the primary handle component P10, the neck 120, and the head 130.

In an example in which the decorative portion 400 is provided on the primary handle component P10, the decorative portion 400 is provided on at least one of the first end P10A, the second end P10B, the first side P10C, the second side P10D, the step P11, the protrusion P13, the constricted portion P20, the tapered portion P30, and the tip P50.

The decorative portion 400 provided in the secondary molding portion Q includes at least one of a decorative portion 400 formed by primary decoration and a decorative portion 400 formed by secondary decoration.

In an example where the decorative portion 400 is provided in the secondary molded portion Q, the decorative portion 400 is provided in the secondary main body forming portion QA.

In an example where the decorative part 400 is provided on the secondary main body component QA, the decorative part 400 is provided on the secondary handle component Q10.

In an example where the decorative portion 400 is provided on the secondary handle component Q10, the decorative portion 400 is provided on at least one of the first end Q10A, the second end Q10B, the first side portion Q10C, the second side portion Q10D, the first component Q11, the second component Q12, the constricted portion Q20, and the tapered portion Q30.

See Figures 9 to 19. In one example, the decorative portion 400 includes a surface relief portion 410. The configuration of the surface relief portion 410 can be selected arbitrarily. The configuration of the surface relief portion 410 is not limited to the configuration shown in the example.

The surface relief 410 is formed by primary decoration. In one example, the mold used to manufacture the molded product 20 includes a specific surface for decoration. The specific surface has a shape corresponding to the surface relief 410. The surface relief 410 is formed by transferring the specific surface of the mold.

In one example, the surface undulations 410 are provided on the primary molding part P. The surface undulations 410 are provided on the primary body component PA. The surface undulations 410 are provided on the primary handle component P10. The surface undulations 410 are configured to impart irregularities to the outer surface PF of the primary handle component P10.

In one example, a reference line is defined for the surface undulations 410. The surface undulations 410 includes a set of outer peripheries spaced apart in the axial, width, or circumferential direction. The reference line is defined, for example, as follows: In a first example, a line located midway between the set of outer peripheries is defined as the reference line. In a second example, the outer periphery of the surface undulations 410, which is configured to extend along the extension direction of the surface undulations 410, is defined as the reference line.

The surface undulations 410 include a first end 411 and a second end 412. The first end 411 is located in a first axial direction relative to the center of the reference line of the surface undulations 410. The second end 412 is located in a second axial direction relative to the center of the reference line of the surface undulations 410.

The first end 411 is provided at the first end P10A of the primary handle component P10. The first end 411 is provided at the second side 100D of the primary handle component P10. The first end 411 includes a first tip 411A.

The second end 412 is provided at the second end P10B of the primary handle component P10. The second end 412 is provided at the first side 100C of the primary handle component P10. The second end 412 includes a second tip 412A.

The surface relief 410 includes one or more geometrically shaped surfaces 420. Examples of the shape of the geometrically shaped surfaces 420 include polygons, ellipses, sectors, and Reuleaux polygons. Ellipses include ellipses having major and minor axes, and circles.

Examples of polygons include regular polygons and general polygons. Examples of regular polygons include equilateral triangles, squares, and regular pentagons. Examples of general polygons include triangles, quadrilaterals, pentagons, hexagons, heptagons, octagons, nonagons, and decagons. Examples of triangles include isosceles triangles, right triangles, and right-angled isosceles triangles. Examples of quadrilaterals include rectangles, rhombus, parallelograms, trapezoids, isosceles trapezoids, and kite shapes.

In one example, the surface undulations 410 include a plurality of geometrically shaped surfaces 420. The following illustrates the configuration of the surface undulations 410 based on the relationship between the plurality of geometrically shaped surfaces 420. In a first example, the type of figure is the same for all of the plurality of geometrically shaped surfaces 420. In a second example, the type of figure is the same for some of the plurality of geometrically shaped surfaces 421. In a third example, the type of figure is different for all of the plurality of geometrically shaped surfaces 420.

Examples 11 to 13 are examples of more detailed information about the first example. In the 11th example, the figures are congruent for all of the multiple seed geometric-shaped surfaces 420. In the 12th example, the figures are congruent for some of the multiple geometric-shaped surfaces 420. In the 13th example, the figures are non-congruent for all of the multiple geometric-shaped surfaces 420.

Examples 21 to 23 are examples of details of the second example. In example 21, the figures are congruent for all of the multiple geometrically shaped surfaces 420 of the same type. In example 22, the figures are congruent for some of the multiple geometrically shaped surfaces 420 of the same type. In example 23, the figures are non-congruent for all of the multiple geometrically shaped surfaces 420 of the same type.

Examples of arrangements of the plurality of geometrically shaped surfaces 420 include a first arrangement and a second arrangement. In the first arrangement, the plurality of geometrically shaped surfaces 420 are arranged in a regular pattern. In the second arrangement, the plurality of geometrically shaped surfaces 420 are arranged in an irregular pattern.

Details of the first arrangement form include, for example, the eleventh and twelfth arrangement forms. In the eleventh arrangement form, the plurality of geometrically shaped surfaces 420 are arranged along a reference line. Examples of reference lines include straight lines, wavy lines, spirals, and curves along the circumferential direction. In the twelfth arrangement form, the plurality of geometrically shaped surfaces 420 are arranged based on a reference different from the reference line.

Details of the eleventh arrangement include, for example, the 111th arrangement and the 121st arrangement. In the 111th arrangement, each geometrically shaped surface 420 included in the plurality of geometrically shaped surfaces 420 is in contact with other geometrically shaped surfaces 420 included in the plurality of geometrically shaped surfaces 420. In the 121st arrangement, each geometrically shaped surface 420 included in the plurality of geometrically shaped surfaces 420 is not in contact with other geometrically shaped surfaces 420 included in the plurality of geometrically shaped surfaces 420.

The following illustrates an example of the contents of the 111th arrangement form when the geometric shape surface 420 corresponding to the 111th arrangement form is a polygon. Each geometric shape surface 420 included in the plurality of geometric shape surfaces 420 shares at least one edge or vertex with at least one other geometric shape surface 420 included in the plurality of geometric shape surfaces 420.

The plurality of geometrically shaped surfaces 420 arranged based on the first arrangement configuration are referred to as the "first group." The plurality of geometrically shaped surfaces 420 arranged based on the eleventh arrangement configuration are referred to as the "eleventh group." The plurality of geometrically shaped surfaces 420 arranged based on the eleventh arrangement configuration are referred to as the "eleventh group." The plurality of geometrically shaped surfaces 420 arranged based on the eleventh arrangement configuration are referred to as the "eleventh group." The plurality of geometrically shaped surfaces 420 arranged based on the twenty-first arrangement configuration are referred to as the "twenty-first group."

The plurality of geometrically shaped surfaces 420 arranged based on the twelfth arrangement form are referred to as the "twelfth group." The plurality of geometrically shaped surfaces 420 arranged based on the second arrangement form are referred to as the "second group." The following provides an example of the configuration of the surface undulations 410 based on the arrangement form of the plurality of geometrically shaped surfaces 420.

In a first example, the surface relief 410 includes at least one first group and no second group. In a second example, the surface relief 410 includes at least one first group and at least one second group.

In a third example, the surface relief 410 includes at least one second group and does not include a first group. In a fourth example, based on the first or second example, the surface relief 410 includes multiple first groups.

In the fifth example, based on the fourth example, the multiple first groups include at least one eleventh group and at least one twelfth group. In the sixth example, based on the fourth example, the multiple first groups include multiple eleventh groups and at least one twelfth group.

In the seventh example, based on the fourth example, the multiple first groups include multiple eleventh groups and multiple twelfth groups. In the eighth example, based on the fourth example, the multiple first groups include multiple eleventh groups and do not include the twelfth group.

In the ninth example, based on the fourth example, the multiple first groups include at least one eleventh group and multiple twelfth groups. In the tenth example, based on the fourth example, the multiple first groups include multiple twelfth groups and do not include an eleventh group.

In an eleventh example, based on any of the sixth to eighth examples, the multiple eleventh groups include at least one eleventh group and at least one twelfth group. In a twelfth example, based on any of the sixth to eighth examples, the multiple eleventh groups include multiple eleventh groups and at least one twelfth group.

In the thirteenth example, based on any of the sixth to eighth examples, the multiple eleventh groups include multiple eleventh groups and multiple eleventh groups. In the fourteenth example, based on any of the sixth to eighth examples, the multiple eleventh groups include multiple eleventh groups, but do not include the twenty-first group.

In the 15th example, based on any of the 6th to 8th examples, the multiple 11th groups include at least one 111th group and multiple 121th groups. In the 16th example, based on any of the 6th to 8th examples, the multiple 11th groups include multiple 121th groups and do not include a 111th group.

In an example where the surface undulations 410 include at least one 111th group, the surface undulations 410 include one or more peaks 430 and/or one or more valleys 440. A peak 430 is formed by at least two adjacent geometrically shaped surfaces 420. A valley 440 is formed by at least two adjacent geometrically shaped surfaces 420.

The following are examples of the configuration of the mountain-shaped portion 430. In a first example, when two adjacent geometrically shaped surfaces 420 share a side, the mountain-shaped portion 430 is configured with the shared side as the apex. In a second example, when at least two adjacent geometrically shaped surfaces 420 share a vertex, the mountain-shaped portion 430 is configured with the shared vertex as the apex.

The following are examples of the configuration of the valley-shaped portion 440. In a first example, when two adjacent geometrically shaped surfaces 420 share a side, the valley-shaped portion 440 is configured with the shared side as the bottom. In a second example, when at least two adjacent geometrically shaped surfaces 420 share a vertex, the valley-shaped portion 440 is configured with the shared vertex as the top.

In the illustrated example, the surface relief portion 410 includes a plurality of geometrically shaped surfaces 420. The arrangement of the plurality of geometrically shaped surfaces 420 is the 111th arrangement. The surface relief portion 410 includes one 111th group.

The plurality of geometrically shaped surfaces 420 constituting group 111 are classified, for example, into first-type geometrically shaped surfaces 421 and second-type geometrically shaped surfaces 422. The plurality of geometrically shaped surfaces 420 includes a plurality of first-type geometrically shaped surfaces 421 and a plurality of second-type geometrically shaped surfaces 422.

The first type geometric shape surface 421 is a surface that primarily constitutes the surface undulations 410. The second type geometric shape surface 422 is a surface that is attached to the first type geometric shape surface 421 and constitutes the surface undulations 410. In Figures 13, 14, 18, and 19, the second type geometric shape surface 422 is indicated by dots.

The shape of the first type geometric shape surface 421 is a polygon. In the illustrated example, the shape of the first type geometric shape surface 421 is an isosceles triangle. All of the multiple first type geometric shape surfaces 421 are congruent. The shape of the second type geometric shape surface 422 is different from the shape of the first type geometric shape surface 421. In the illustrated example, the shape of the second type geometric shape surface is, for example, a triangle, a figure in which one of the sides of a triangle is replaced with an arc, or a figure composed of an arc and a chord.

A portion of the plurality of second-type geometric shape surfaces 422 is provided at the first end 411 of the surface undulation portion 410. Another portion of the plurality of second-type geometric shape surfaces 422 is provided at the second end 412 of the surface undulation portion 410.

The outer surface PF of the primary handle component P10 includes a base surface P10F and a geometrically shaped surface 420. The base surface P10F is the surface surrounding the geometrically shaped surface 420. The base surface P10F is a curved surface. The geometrically shaped surface 420 is a flat surface.

For example, the geometric shape surface 420 intersects at least one of the first reference surface, the second reference surface, and the third reference surface.

At least one geometrically shaped surface 420 included in the surface undulation portion 410 faces the interior of the secondary molding portion Q in the first axial direction.

At least one geometrically shaped surface 420 included in the surface undulation portion 410 faces the interior of the secondary molding portion Q in the second axial direction.

At least one geometrically shaped surface 420 included in the surface undulation portion 410 faces the interior of the secondary molding portion Q in the first circumferential direction.

At least one geometrically shaped surface 420 included in the surface undulation portion 410 faces the interior of the secondary molding portion Q in the second circumferential direction.

The arrangement configuration for the multiple geometrically shaped surfaces 420 is the 111th arrangement configuration. The reference line is a spiral. The relationship between two adjacent geometrically shaped surfaces 420 is classified into a first relationship, a second relationship, and a third relationship.

In the first relationship, two adjacent geometric surfaces 420 share an equal side of an isosceles triangle. In the second relationship, two adjacent geometric surfaces 420 share a vertex of an isosceles triangle. In the third relationship, two adjacent geometric surfaces 420 share a base of an isosceles triangle.

The surface relief 410 includes multiple chevrons 430. Each chevron 430 is composed of two geometrically shaped surfaces 420 having a first relationship, or two geometrically shaped surfaces 420 having a second relationship. The top of each chevron 430 is composed of an equilateral side shared by the two geometrically shaped surfaces 420, or a vertex shared by the two geometrically shaped surfaces 420.

The surface undulations 410 include multiple mountain-shaped portions 430. The valley-shaped portions 440 are formed by two geometrically shaped surfaces 420 having a third relationship. The bottom of the valley-shaped portions 440 is formed by a base shared by the two geometrically shaped surfaces 420.

The surface undulations 410 include an outer periphery 450. The outer periphery 450 forms the boundary between the surface undulations 410 and the base surface P10F of the primary handle component P10.

The outer periphery 450 includes, for example, a first outer periphery 451, a second outer periphery 452, a third outer periphery 453, and a fourth outer periphery 454.

The first outer periphery 451 has a spiral shape. The first outer periphery 451 includes a first tip 451A and a second tip 451B.

The second outer periphery 452 has a spiral shape. The second outer periphery 452 includes a first tip 452A and a second tip 452B.

The third outer periphery 453 is located between the first tip 451A of the first outer periphery 451 and the first tip 452A of the second outer periphery 452. The third outer periphery 453 has a linear shape. The linear third outer periphery 453 is formed by the multiple second type geometric shape surfaces 422 provided on the first end 411 of the surface undulations 410.

The third outer periphery 453 includes a first tip 453A and a second tip 453B. The first tip 453A is connected to the first tip 451A of the first outer periphery 451. The second tip 453B is connected to the first tip 452A of the second outer periphery 452.

The fourth outer periphery 454 is located between the second tip 451B of the first outer periphery 451 and the second tip 452B of the second outer periphery 452. The fourth outer periphery 454 has a linear shape. The linear fourth outer periphery 454 is formed by a plurality of second-type geometric shape surfaces 422 provided at the second end 412 of the surface undulations 410.

The fourth outer periphery 454 includes a first tip 454A and a second tip 454B. The first tip 454A connects to the second tip 451B of the first outer periphery 451. The second tip 454B connects to the second tip 452B of the second outer periphery 452.

The connection between the first tip 451A of the first outer peripheral portion 451 and the first tip 453A of the third outer peripheral portion 453 corresponds to the first tip 411A of the first end portion 411 of the surface undulation portion 410.

The connection between the second tip 451B of the second outer peripheral portion 452 and the second tip 454B of the fourth outer peripheral portion 454 corresponds to the second tip 412A of the second end 412 of the surface undulation portion 410.

See Figures 1 to 4. The secondary molded part Q includes a covering part Q40. The configuration of the covering part Q40 can be selected arbitrarily. The configuration of the covering part Q40 is not limited to the configuration shown in the example. The covering part Q40 is configured to cover the outer surface PF of the covering target part PC of the primary molded part P. The covering part Q40 is joined to the outer surface PF of the covering target part PC.

The outer surface QF of the coated portion Q40 and the outer surface PF of the coated portion PC located around the coated portion Q40 constitute part of the outer surface 20F of the molded article 20. In one example, the coated portion Q40 is configured so that the outer surface PF of the primary molded portion P located around the coated portion Q40 and the outer surface QF of the coated portion Q40 are continuous. The portion of the outer surface 20F of the molded article 20 constituted by the outer surface QF of the coated portion Q40 and the outer surface PF of the primary molded portion P located around the coated portion Q40 is a smooth surface.

The covering portion Q40 is configured to extend in the axial direction. The covering portion Q40 includes a first end portion Q40A, a second end portion Q40B, and an intermediate portion Q40C in the axial direction.

The first end Q40A is located in the first axial direction relative to the center of the covering portion Q40 in the axial direction. The first end Q40A covers the outer surface PF of the primary handle component P10. The first end Q40A is joined to the outer surface PF of the primary handle component P10.

The second end Q40B is located in the second axial direction relative to the center of the covering portion Q40 in the axial direction. The second end Q40B covers the outer surface PF of the primary handle component P10. The second end Q40B is joined to the outer surface PF of the primary handle component P10.

The intermediate portion Q40C covers the outer surface PF of the primary handle component P10. The intermediate portion Q40C is joined to the outer surface PF of the primary handle component P10. The intermediate portion Q40C is located between the first end portion Q40A and the second end portion Q40B in the axial direction.

The covering portion Q40 is configured to extend in the circumferential direction of the molded product 20. The covering portion Q40 is configured to make one full revolution around the central axis of the molded product 20.

In the illustrated example, the covering portion Q40 is included in the secondary handle component Q10. The covering portion Q40 is configured as the secondary handle component Q10.

The first end Q40A of the covering portion Q40 corresponds to the first end Q10A of the secondary handle component Q10. The second end Q40B of the covering portion Q40 corresponds to the second end Q10B of the secondary handle component Q10. The middle portion Q40C of the covering portion Q40 corresponds to the middle portion of the secondary handle component Q10 located between the first end Q10A and the second end Q10B.

In one example, the covering portion Q40 includes a decorative exterior portion Q50. The configuration of the decorative exterior portion Q50 can be selected arbitrarily. The configuration of the decorative exterior portion Q50 is not limited to the configuration shown in the example. The decorative exterior portion Q50 is configured to cover the decorative portion 400.

Examples of areas where the decorative exterior part Q50 is provided include Example A and Example B.

In Example A, a decorative portion 400 is provided on at least the primary molded portion P of the molded product 20. A decorative exterior portion Q50 is provided on at least the outer surface PF of the primary molded portion P. Example A can take the form of at least one of Examples A1 and A2, for example.

In Example A1, a decorative portion 400 is provided on at least the primary body component PA of the primary molded portion P. A decorative exterior portion Q50 is provided on at least the outer surface PF of the primary body component PA. Example A1 can take the form of at least one of Examples A11 to A13, for example.

In example A2, a decorative portion 400 is provided on at least the protruding portion 220 of the primary molded portion P. A decorative exterior portion Q50 is provided on at least the outer surface PF of the protruding portion 220.

In Example A11, a decorative portion 400 is provided on at least the primary handle component P10 of the primary body component PA. A decorative exterior portion Q50 is provided on at least the outer surface PF of the primary handle component P10. Example A11 can take the form of at least one of Examples A111 to A119, for example.

In example A12, a decorative portion 400 is provided on at least the neck 120 of the primary body component PA. A decorative exterior portion Q50 is provided on at least the outer surface PF of the neck 120.

In example A13, a decorative portion 400 is provided on at least the head 130 of the primary body component PA. A decorative exterior portion Q50 is provided on at least the outer surface PF of the head 130.

In Example A111, a decorative portion 400 is provided on at least the first end P10A of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the first end P10A.

In example A112, a decorative portion 400 is provided on at least the second end P10B of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the second end P10B.

In example A113, a decorative portion 400 is provided on at least the first side portion P10C of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the first side portion P10C.

In example A114, a decorative portion 400 is provided on at least the second side portion P10D of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the second side portion P10D.

In example A115, a decorative portion 400 is provided on at least the step portion P11 of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the step portion P11.

In example A116, a decorative portion 400 is provided on at least the protruding portion P13 of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the protruding portion P13.

In example A117, a decorative portion 400 is provided on at least the constricted portion P20 of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the constricted portion P20.

In example A118, a decorative portion 400 is provided on at least the tapered portion P30 of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the tapered portion P30.

In example A119, a decorative portion 400 is provided on at least the main body protrusion P40 of the primary handle component P10. A decorative exterior portion Q50 is provided on at least the outer surface PF of the main body protrusion P40.

In Example B, a decorative portion 400 is provided on at least the secondary molded portion Q of the molded product 20. A decorative exterior portion Q50 is provided on at least the outer surface QF of the secondary molded portion Q. Example B can take the form of, for example, Example B1.

In Example B1, a decorative portion 400 is provided on at least the secondary main body component QA of the secondary molded portion Q. A decorative exterior portion Q50 is provided on at least the outer surface QF of the secondary main body component QA. Example B1 can take the form of, for example, Example B11.

In Example B11, a decorative portion 400 is provided on at least the secondary handle component Q10 of the secondary body component QA. A decorative exterior portion Q50 is provided on at least the outer surface QF of the secondary handle component Q10. Example B11 may take the form of at least one of Examples B111 to B118, for example.

In example B111, a decorative portion 400 is provided on at least the first end Q10A of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the first end Q10A.

In example B112, a decorative portion 400 is provided on at least the second end Q10B of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the second end Q10B.

In example B113, a decorative portion 400 is provided on at least the first side portion Q10C of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the first side portion Q10C.

In example B114, a decorative portion 400 is provided on at least the second side portion Q10D of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the second side portion Q10D.

In example B115, a decorative portion 400 is provided on at least the first component Q11 of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the first component Q11.

In example B116, a decorative portion 400 is provided on at least the second component Q12 of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the second component Q12.

In example B117, a decorative portion 400 is provided on at least the constricted portion Q20 of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the constricted portion Q20.

In example B118, a decorative portion 400 is provided on at least the tapered portion Q30 of the secondary handle component Q10. A decorative exterior portion Q50 is provided on at least the outer surface QF of the tapered portion Q30.

In the illustrated example, the decorative exterior part Q50 is included in the secondary main body component QA. The decorative exterior part Q50 is included in the secondary handle component Q10. The decorative exterior part Q50 is configured to cover the surface relief part 410 provided on the primary handle component P10. In one example, the outer surface QF of the decorative exterior part Q50 is smooth compared to the outer surface PF of the surface relief part 410.

See Figures 20 to 22. The molded product 20 includes an exposure structure 500. The exposure structure 500 is configured so that the portion of the secondary molded part Q that is exposed relative to the covering part Q40 is included in the primary molded part P. The configuration of the exposure structure 500 can be selected arbitrarily. The configuration of the exposure structure 500 is not limited to the configuration shown in the example.

The exposure structure 500 includes one or more through-holes P100. The configuration of the through-holes P100 can be selected arbitrarily. The configuration of the through-holes P100 is not limited to the configuration shown in the example. The through-holes P100 are provided in the primary molding part P. The through-holes P100 are configured so that the force applied to the primary molding part P can be transmitted to the mold during the secondary molding process in which the secondary molding part Q is molded.

The through portion P100 is configured to protrude relative to the outer surface PF of the coating target portion PC of the primary molded part P. In one example, the through portion P100 is configured to protrude in a direction that includes a radially outward component. The through portion P100 includes an outer surface P110. The outer surface P110 includes a top surface P111 and a side surface P112.

The exposed structure 500 includes one or more through-hole arrangement portions Q100. The configuration of the through-hole arrangement portion Q100 can be selected arbitrarily. The configuration of the through-hole arrangement portion Q100 is not limited to the configuration illustrated. The through-hole arrangement portion Q100 is provided in the secondary molded portion Q. The through-hole arrangement portion Q100 is configured so that the through-hole portion P100 can be placed therein.

The through-hole arrangement portion Q100 includes a through-hole space Q101, an inner peripheral surface Q102, and two openings Q103. The through-hole space Q101 is configured so that the through-hole portion P100 can be arranged therein. The inner peripheral surface Q102 defines the through-hole space Q101. One opening Q103 opens to the outer surface QF of the secondary molded portion Q. The other opening Q103 opens to the inner peripheral surface of the secondary molded portion Q that faces the outer surface PF of the primary molded portion P.

The following are examples of the shape of the top surface P111 of the through portion P100. In the first example, at least a portion of the top surface P111 is curved. The center of the curved surface is set in the radially inward or radially outward direction relative to the top surface P111. Examples 11 and 12 are examples of details of the first example. In the 11th example, the entire top surface P111 is curved. In the 12th example, only a portion of the top surface P111 is curved. The other portion of the top surface P111 is not curved.

In the second example, at least a portion of the top surface P111 is a flat surface. Examples 21 and 22 are examples of details of the second example. In the 21st example, the entire top surface P111 is a flat surface. In the 22nd example, a portion of the top surface P111 is a flat surface. Another portion of the top surface P111 is a surface other than a flat surface.

The through portion P100 includes an exposed surface P101. The exposed surface P101 is configured to be exposed to the covering portion Q40 of the secondary molding portion Q. The exposed surface P101 is configured to come into contact with the mold during the secondary molding process. The exposed surface P101 forms part of the outer surface 20F of the molded product 20. The exposed surface P101 is included in the outer surface P110 of the through portion P100.

In one example, the through portion P100 is provided in the primary molding portion P so that the force that the primary molding portion P receives from the resin material corresponding to the secondary molding portion Q, which causes the primary molding portion P to deform during the secondary molding process in which the secondary molding portion Q is molded, can be transmitted from the exposed surface P101 to the mold.

The penetrating portion P100 is divided into, for example, a first end P100A, a second end P100B, and an intermediate portion P100C in the height direction of the penetrating portion P100. The first end P100A corresponds to the tip of the penetrating portion P100. The second end P100B corresponds to the base of the penetrating portion P100. The intermediate portion P100C is located between the first end P100A and the second end P100B. The top surface P111 is formed at the tip of the first end P100A.

Examples of structures that define the relationship between the exposed surface P101 of the through portion P100 and the outer surface QF of the secondary molded portion Q include a recessed structure 501, a smooth structure 502, and a protruding structure 503. The configurations of the recessed structure 501, the smooth structure 502, and the protruding structure 503 can be selected arbitrarily. The configurations of the recessed structure 501, the smooth structure 502, and the protruding structure 503 are not limited to the configurations shown in the examples.

See Figure 20. In the recessed structure 501, the penetration portion P100 is recessed relative to the outer surface QF of the covering portion Q40, and a step portion 501A is formed between the penetration portion P100 and the outer surface QF.

The following are examples of the configuration of the recessed structure 501. In the first example, the entire top surface P111 of the through portion P100 is exposed to the covering portion Q40. The side surface P112 of the through portion P100 is covered by the covering portion Q40. The exposed surface P101 is made up of the entire top surface P111.

In the second example, a portion of the top surface P111 of the through portion P100 is exposed to the covering portion Q40. Another portion of the top surface P111 is covered by the covering portion Q40. The portion of the top surface P111 is, for example, a portion located inside the periphery of the top surface P111. The other portion of the top surface P111 is, for example, the periphery of the top surface P111. The side surface P112 of the through portion P100 is covered by the covering portion Q40. The exposed surface P101 is formed by a portion of the top surface P111.

See Figure 21. In the smooth structure 502, the through portion P100 is configured so that the exposed surface P101 formed by the top surface P111 of the through portion P100 is smoothly connected to the outer surface QF of the secondary molded portion Q located around the exposed surface P101. A portion of the outer surface 20F of the molded product 20 formed by the exposed surface P101 and the outer surface QF of the secondary molded portion Q located around the exposed surface P101 is a smooth surface.

The following are examples of the configuration of the smooth structure 502. In the first example, the entire top surface P111 of the through portion P100 is exposed to the covering portion Q40. The side surface P112 of the through portion P100 is covered by the covering portion Q40. The exposed surface P101 is made up of the entire top surface P111.

In the second example, a portion of the top surface P111 of the through portion P100 is exposed to the covering portion Q40. Another portion of the top surface P111 is covered by the covering portion Q40. The portion of the top surface P111 is, for example, a portion located inside the periphery of the top surface P111. The other portion of the top surface P111 is, for example, the periphery of the top surface P111. The side surface P112 of the through portion P100 is covered by the covering portion Q40. The exposed surface P101 is formed by a portion of the top surface P111.

See Figure 22. In the protruding structure 503, the through portion P100 protrudes from the outer surface QF of the covering portion Q40, and is configured so that a step is formed between the through portion P100 and the outer surface QF. The through portion P100 includes a through portion protrusion 503A that protrudes from the outer surface QF.

The configuration of the protruding structure 503 will now be illustrated. In a first example, the penetrating portion protruding portion 503A includes all or part of the first end P100A of the penetrating portion P100. The outer surface P110 of the penetrating portion protruding portion 503A includes a top surface P111 and a side surface P112. The side surface P112 of the penetrating portion protruding portion 503A includes all or part of the side surface P112 of the first end P100A.

The entire top surface P111 of the penetrating portion protrusion 503A is exposed to the covering portion Q40. The side surface P112 of the penetrating portion protrusion 503A is exposed to the covering portion Q40. The other side surface P112 is covered by the covering portion Q40. The exposed surface P101 is composed of the top surface P111 and the side surface P112 of the penetrating portion protrusion 503A.

In a second example, the penetrating portion protrusion 503A includes the entire first end P100A of the penetrating portion P100 and part or all of the intermediate portion P100C. The outer surface P110 of the penetrating portion protrusion 503A includes a top surface P111 and a side surface P112. The side surface P112 of the penetrating portion protrusion 503A includes the entire side surface P112 of the first end P100A and part or all of the side surface P112 of the intermediate portion P100C.

The entire top surface P111 of the penetrating portion protrusion 503A is exposed to the covering portion Q40. The side surface P112 of the penetrating portion protrusion 503A is exposed to the covering portion Q40. The other side surface P112 is covered by the covering portion Q40. The exposed surface P101 is composed of the top surface P111 and the side surface P112 of the penetrating portion protrusion 503A.

In the third example, the penetrating portion protrusion 503A includes the entire first end P100A, the entire middle portion P100C, and part or all of the second end P100B of the penetrating portion P100. The outer surface P110 of the penetrating portion protrusion 503A includes a top surface P111 and a side surface P112. The side surface P112 of the penetrating portion protrusion 503A includes the entire side surface P112 of the first end P100A, the entire side surface P112 of the middle portion P100C, and part or all of the side surface P112 of the second end P100B.

The entire top surface P111 of the penetrating portion protrusion 503A is exposed to the covering portion Q40. The side surface P112 of the penetrating portion protrusion 503A is exposed to the covering portion Q40. In an example in which the penetrating portion protrusion 503A includes part of the second end portion P100B, the side surface P112 of the second end portion P100B that is not included in the penetrating portion protrusion 503A is covered by the covering portion Q40. The exposed surface P101 is composed of the top surface P111 and side surface P112 of the penetrating portion protrusion 503A.

The outer surface QF of the secondary molded portion Q is divided into, for example, a front surface, a back surface, a first side surface, or a second side surface in the circumferential direction. The secondary molded portion Q includes a gate-related portion. The position of the gate-related portion in the circumferential direction is selected from, for example, the front surface, back surface, first side surface, or second side surface of the secondary molded portion Q.

The gate-related portion includes the gate of the secondary molded portion Q, the gate mark of the secondary molded portion Q, or the gate-corresponding portion of the secondary molded portion Q where the gate existed during the secondary molding process. In one example, the gate-corresponding portion is formed by processing the outer surface QF of the secondary molded portion Q in the molded product 20 so that the gate of the secondary molded portion Q and the gate mark of the secondary molded portion Q do not remain.

The axial position of the gate-related portion is selected from, for example, the first end Q10A, the second end Q10B, the constricted portion Q20, or the tapered portion Q30. The axial position of the gate in the constricted portion Q20 is selected from, for example, the first end Q20A, the second end Q20B, or the intermediate portion Q20C.

Any of the front, back, first side, or second side of the secondary molded part Q on which the gate-related part is formed is referred to as the "gate-corresponding surface of the secondary molded part Q." The surface located opposite the gate-corresponding surface of the secondary molded part Q is referred to as the "opposite surface of the secondary molded part Q."

Of the front, back, first side, or second side of the secondary molded portion Q, one surface located between the gate corresponding surface of the secondary molded portion Q and the opposite surface of the secondary molded portion Q is referred to as the "first intermediate surface of the secondary molded portion Q." Of the front, back, first side, or second side of the secondary molded portion Q, the other surface located between the gate corresponding surface of the secondary molded portion Q and the opposite surface of the secondary molded portion Q is referred to as the "second intermediate surface of the secondary molded portion Q."

In an example where the gate-related portion is formed on the front surface of the secondary molded portion Q, the gate-corresponding surface of the secondary molded portion Q is the front surface of the secondary molded portion Q, and the opposite surface of the secondary molded portion Q is the back surface of the secondary molded portion Q. In an example where the gate-related portion is formed on the back surface of the secondary molded portion Q, the gate-corresponding surface of the secondary molded portion Q is the back surface of the secondary molded portion Q, and the opposite surface of the secondary molded portion Q is the front surface of the secondary molded portion Q.

In an example where the gate-related portion is formed on the first side surface of the secondary molded portion Q, the gate-corresponding surface of the secondary molded portion Q is the first side surface of the secondary molded portion Q, and the opposite surface of the secondary molded portion Q is the second side surface of the secondary molded portion Q. In an example where the gate-related portion is formed on the second side surface of the secondary molded portion Q, the gate-corresponding surface of the secondary molded portion Q is the second side surface of the secondary molded portion Q, and the opposite surface of the secondary molded portion Q is the first side surface of the secondary molded portion Q.

The outer surface PF of the primary molded portion P is divided into, for example, a front surface, a back surface, a first side surface, or a second side surface in the circumferential direction. Of the front surface, back surface, first side surface, or second side surface of the primary molded portion P, the surface that corresponds to the gate corresponding surface of the secondary molded portion Q is referred to as the "gate corresponding surface of the primary molded portion P." The surface that corresponds to the opposite surface of the secondary molded portion Q is referred to as the "opposite surface of the primary molded portion P." The surface that corresponds to the first intermediate surface of the secondary molded portion Q is referred to as the "first intermediate surface of the primary molded portion P." The surface that corresponds to the second intermediate surface of the secondary molded portion Q is referred to as the "second intermediate surface of the primary molded portion P."

The following are examples of the configuration of the exposed surface P101 of the through portion P100. In the first example, the exposed surface P101 includes at least a portion corresponding to the opposite surface of the secondary molded portion Q. The exposed surface P101 corresponding to the opposite surface of the secondary molded portion Q, together with the opposite surface of the adjacent secondary molded portion Q, constitutes part of the outer surface 20F of the molded product 20.

In the second example, the exposed surface P101 includes at least a portion corresponding to the opposite surface of the secondary molded portion Q. The exposed surface P101 corresponding to the opposite surface of the secondary molded portion Q, together with the opposite surface of the adjacent secondary molded portion Q, constitutes part of the outer surface 20F of the molded product 20.

In the third example, the exposed surface P101 includes at least a portion corresponding to the first intermediate surface of the secondary molded portion Q. The exposed surface P101 corresponding to the first intermediate surface of the secondary molded portion Q, together with the first intermediate surface of the adjacent secondary molded portion Q, constitutes part of the outer surface 20F of the molded product 20.

In the fourth example, the exposed surface P101 includes at least a portion corresponding to the second intermediate surface of the secondary molded portion Q. The exposed surface P101 corresponding to the second intermediate surface of the secondary molded portion Q, together with the second intermediate surface of the adjacent secondary molded portion Q, constitutes part of the outer surface 20F of the molded product 20.

In the fifth example, based on the first example, the exposed surface P101 further includes the configuration of at least one of the third and fourth examples. In the sixth example, based on the fifth example, the exposed surface P101 further includes the configuration of the second example.

See Figures 20 to 22. In one example, the through portion P100 includes a peripheral end portion P120. The peripheral end portion P120 includes a first peripheral end portion P121 and a second peripheral end portion P122. The first peripheral end portion P121 is located in a first circumferential direction relative to the center of the through portion P100 in the circumferential direction. The second peripheral end portion P122 is located in a second circumferential direction relative to the center of the through portion P100 in the circumferential direction.

The circumferential length of the through-hole P100 is referred to as the "through-hole circumferential length." In one example, the maximum distance between the first circumferential end P121 and the second circumferential end P122 in the circumferential direction is selected as the through-hole circumferential length.

The center of the through-hole P100 in the circumferential direction is referred to as the "through-hole circumferential center." Examples of the location of the through-hole circumferential center are given below. In the first example, the through-hole circumferential center is located on the opposite surface of the primary molding portion P. In the second example, the through-hole circumferential center is located on the gate-corresponding surface of the primary molding portion P. In the third example, the through-hole circumferential center is located on the first intermediate surface of the primary molding portion P. In the fourth example, the through-hole circumferential center is located on the second intermediate surface of the primary molding portion P.

The following are examples of the position of the first peripheral end P121 in the circumferential direction. In the first example, the first peripheral end P121 is located on the opposite surface of the primary molding portion P. In the second example, the first peripheral end P121 is located on the gate-corresponding surface of the primary molding portion P. In the third example, the first peripheral end P121 is located on the first intermediate surface of the primary molding portion P. In the fourth example, the first peripheral end P121 is located on the second intermediate surface of the primary molding portion P.

The following are examples of the position of the second peripheral end P122 in the circumferential direction. In the first example, the second peripheral end P122 is located on the opposite surface of the primary molding portion P. In the second example, the second peripheral end P122 is located on the gate-corresponding surface of the primary molding portion P. In the third example, the second peripheral end P122 is located on the first intermediate surface of the primary molding portion P. In the fourth example, the second peripheral end P122 is located on the second intermediate surface of the primary molding portion P.

Refer to Figures 23 and 24. In one example, the through portion P100 includes an axial end P130. The axial end P130 includes a first axial end P131 and a second axial end P132. The first axial end P131 is located in the first axial direction relative to the center of the through portion P100 in the axial direction. The second axial end P132 is located in the second axial direction relative to the center of the through portion P100 in the axial direction. The axial length of the through portion P100 is referred to as the "through portion axial length." In one example, the maximum distance between the first axial end P131 and the second axial end P132 in the axial direction is selected as the through portion axial length.

The center of the through-hole P100 in the axial direction is referred to as the "through-hole axial center." Examples of the position of the through-hole axial center are shown below. In the first example, the through-hole axial center is located at the first end PCA of the part to be coated PC. In the second example, the through-hole axial center is located at the second end PCB of the part to be coated PC. In the third example, the through-hole axial center is located at the middle part PCC of the part to be coated PC.

Examples 31 to 33 are examples of details of the third example. In Example 31, the center of the penetration is located at the first intermediate portion PCCA of the part to be covered PC. In Example 32, the center of the penetration is located at the second intermediate portion PCCB of the part to be covered PC. In Example 33, the center of the penetration is located at the center of the intermediate portion PCC of the part to be covered PC.

The following are examples of the position of the first axial end P131 in the axial direction. In the first example, the first axial end P131 is located at the first end PCA of the part to be coated PC. In the second example, the first axial end P131 is located at the second end PCB of the part to be coated PC. In the third example, the first axial end P131 is located at the middle part PCC of the part to be coated PC.

Examples 31 to 33 are examples of more detailed examples of the third example. In Example 31, the first shaft end P131 is located at the first intermediate portion PCCA of the part to be coated PC. In Example 32, the first shaft end P131 is located at the second intermediate portion PCCB of the part to be coated PC. In Example 33, the first shaft end P131 is located at the center of the intermediate portion PCC of the part to be coated PC.

The following are examples of the position of the second axial end P132 in the axial direction. In the first example, the second axial end P132 is located at the first end PCA of the part to be coated PC. In the second example, the second axial end P132 is located at the second end PCB of the part to be coated PC. In the third example, the second axial end P132 is located at the middle part PCC of the part to be coated PC.

Details of Example 3 include Examples 31 to 33. In Example 31, the second shaft end P132 is located at the first intermediate portion PCCA of the part to be coated PC. In Example 32, the second shaft end P132 is located at the second intermediate portion PCCB of the part to be coated PC. In Example 33, the second shaft end P132 is located at the center of the intermediate portion PCC of the part to be coated PC.

See Figures 25 to 36. In one example, the through-holes P100 are classified into a first-type through-hole P100 (hereinafter referred to as a "first-type through-hole P100X1"), a second-type through-hole P100 (hereinafter referred to as a "second-type through-hole P100X2"), and a third-type through-hole P100 (hereinafter referred to as a "third-type through-hole P100X3") depending on the position of the axial center of the through-hole.

The first type penetration portion P100X1 is located at least at the first end portion PCA of the part to be coated PC. The second type penetration portion P100X2 is located at least at the second end portion PCB of the part to be coated PC. The third type penetration portion P100X3 is located at least at the middle portion PCC of the part to be coated PC.

The position of the center of the axis of the first type through-hole P100X1 is the first end PCA of the part to be coated PC. The position of the center of the axis of the second type through-hole P100X2 is the second end PCB of the part to be coated PC. The position of the center of the axis of the third type through-hole P100X3 is the middle part PCC of the part to be coated PC.

In one example, the first type through-hole P100X1 is classified into a first type A through-hole, a first type B through-hole, a first type C through-hole, and a first type D through-hole depending on the position of the circumferential center of the through-hole.

The position of the circumferential center of the first type A through portion is the opposite surface of the primary molding portion P. The position of the circumferential center of the first type B through portion is the gate-corresponding surface of the primary molding portion P. The position of the circumferential center of the first type C through portion is the first intermediate surface of the primary molding portion P. The position of the circumferential center of the first type D through portion is the second intermediate surface of the primary molding portion P.

In one example, the second type through-hole P100X2 is classified into a second type A through-hole, a second type B through-hole, a second type C through-hole, and a second type D through-hole depending on the position of the circumferential center of the through-hole.

The position of the circumferential center of the second type A through portion is the opposite surface of the primary molding portion P. The position of the circumferential center of the second type B through portion is the gate-corresponding surface of the primary molding portion P. The position of the circumferential center of the second type C through portion is the first intermediate surface of the primary molding portion P. The position of the circumferential center of the second type D through portion is the second intermediate surface of the primary molding portion P.

In one example, the third type penetration portion P100X3 is classified into a third type A penetration portion, a third type B penetration portion, a third type C penetration portion, and a third type D penetration portion depending on the position of the circumferential center of the penetration portion.

The position of the circumferential center of the 3A type through portion is the opposite surface of the primary molding portion P. The position of the circumferential center of the 3B type through portion is the gate-corresponding surface of the primary molding portion P. The position of the circumferential center of the 3C type through portion is the first intermediate surface of the primary molding portion P. The position of the circumferential center of the 3D type through portion is the second intermediate surface of the primary molding portion P.

The following shows an example of the configuration of the exposure structure 500 based on the classification of the penetration part P100.

In the first example, the exposed structure 500 includes one or more first-type through-portions P100X1. The exposed structure 500 does not include a second-type through-portion P100X2 or a third-type through-portion P100X3.

In the second example, the exposed structure 500 includes one or more second-type through portions P100X2. The exposed structure 500 does not include the first-type through portion P100X1 or the third-type through portion P100X3.

In the third example, the exposed structure 500 includes one or more third-type through portions P100X3. The exposed structure 500 does not include the first-type through portion P100X1 or the second-type through portion P100X2.

In the fourth example, the exposed structure 500 includes one or more first-type through portions P100X1 and one or more second-type through portions P100X2. The exposed structure 500 does not include a third-type through portion P100X3.

In the fifth example, the exposed structure 500 includes one or more first-type through portions P100X1 and one or more third-type through portions P100X3. The exposed structure 500 does not include a second-type through portion P100X2.

In the sixth example, the exposed structure 500 includes one or more second-type through portions P100X2 and one or more third-type through portions P100X3. The exposed structure 500 does not include a first-type through portion P100X1.

In the seventh example, the exposed structure 500 includes one or more first-type through-portions P100X1, one or more second-type through-portions P100X2, and one or more third-type through-portions P100X3.

The number of first type through portions P100X1 included in the exposed structure 500 is referred to as "N1." The number of first type A through portions included in the exposed structure 500 is referred to as "N1A." The number of first type B through portions included in the exposed structure 500 is referred to as "N1B." The number of first type C through portions included in the exposed structure 500 is referred to as "N1C." The number of first type D through portions included in the exposed structure 500 is referred to as "N1D." N1 is the sum of N1A, N1B, N1C, and N1D.

The number of second type through-portions P100X2 included in the exposed structure 500 is referred to as "N2". The number of second type A through-portions included in the exposed structure 500 is referred to as "N2A". The number of second type B through-portions included in the exposed structure 500 is referred to as "N2B". The number of second type C through-portions included in the exposed structure 500 is referred to as "N2C". The number of second type D through-portions included in the exposed structure 500 is referred to as "N2D". N2 is the sum of N2A, N2B, N2C, and N2D.

The number of third type through-portions P100X3 included in the exposed structure 500 is referred to as "N3." The number of third type through-portions P100X3 included in the exposed structure 500 is referred to as "N3A." The number of third type through-portions included in the exposed structure 500 is referred to as "N3B." The number of third type through-portions included in the exposed structure 500 is referred to as "N3C." The number of third type through-portions included in the exposed structure 500 is referred to as "N3D." N3 is the sum of N3A, N3B, N3C, and N3D.

Examples of the configuration of the exposure structure 500 based on the number of through-holes P100 include a first configuration and a second configuration. In the first configuration, the exposure structure 500 includes one through-hole P100. In the second configuration, the exposure structure 500 includes multiple through-holes P100.

The following illustrates the configuration of the first form of exposure structure 500. In the first example, N1 is 1. N2 is 0. N3 is 0. In the second example, N1 is 0. N2 is 1. N3 is 0. In the third example, N1 is 0. N2 is 0. N3 is 1.

The following are examples of the configuration of the second form of exposure structure 500. In the first example, N1 is 2 or more. N2 is 0. N3 is 0. In the second example, N1 is 2 or more. N2 is 1. N3 is 0. In the third example, N1 is 2 or more. N2 is 0. N3 is 1. In the fourth example, N1 is 2 or more. N2 is 2 or more. N3 is 0.

In the fifth example, N1 is 2 or greater. N2 is 0 or greater. N3 is 2 or greater. In the sixth example, N1 is 2 or greater. N2 is 1. N3 is 1. In the seventh example, N1 is 2 or greater. N2 is 2 or greater. N3 is 1. In the eighth example, N1 is 2 or greater. N2 is 1. N3 is 2 or greater.

In the ninth example, N1 is 2 or greater. N2 is 2 or greater. N3 is 2 or greater. In the tenth example, N1 is 0. N2 is 2 or greater. N3 is 0. In the eleventh example, N1 is 1. N2 is 2 or greater. N3 is 0. In the twelfth example, N1 is 0. N2 is 2 or greater. N3 is 1.

In the 13th example, N1 is 0. N2 is 2 or greater. N3 is 2 or greater. In the 14th example, N1 is 1. N2 is 2 or greater. N3 is 1. In the 15th example, N1 is 1. N2 is 2 or greater. N3 is 2 or greater. In the 16th example, N1 is 0. N2 is 0. N3 is 2 or greater.

In the 17th example, N1 is 1. N2 is 0. N3 is 2 or greater. In the 18th example, N1 is 0. N2 is 1. N3 is 2 or greater. In the 19th example, N1 is 1. N2 is 1. N3 is 2 or greater. In the 20th example, N1 is 1. N2 is 2 or greater. N3 is 2 or greater.

In the second form of the exposure structure 500, the multiple through-holes P100 are classified, for example, into a first group, a second group, and a third group. The following describes an example of the configuration of the exposure structure 500 based on the first to third groups. In the first example, the exposure structure 500 includes any one of the first to third groups. In the second example, the exposure structure 500 includes any two of the first to third groups. In the third example, the exposure structure 500 includes all of the first to third groups.

Each group includes one or more penetration portions P100. The first group includes one or more first-type penetration portions P100X1. The second group includes one or more second-type penetration portions P100X2. The third group includes one or more third-type penetration portions P100X3.

The number of first-type penetrating portions P100X1 included in the first group is referred to as "NG1." The number of second-type penetrating portions P100X2 included in the second group is referred to as "NG2." The number of third-type penetrating portions P100X3 included in the third group is referred to as "NG3."

The following are examples of the relationship between the number of penetrations P100 included in each group. In the first example, NG1, NG2, and NG3 are equal. In the second example, NG1 and NG2 are different from NG3. Examples 21 to 24 are examples of details of the second example. In the 21st example, NG1 and NG2 are greater than NG3. In the 22nd example, assuming the 21st example, NG1 and NG2 are equal. In the 23rd example, assuming the 21st example, NG1 is greater than NG2. In the 24th example, assuming the 21st example, NG1 is less than NG2.

In the third example, NG1 and NG3 are different from NG2. Examples 31 to 34 are examples of the third example in more detail. In the 31st example, NG1 and NG3 are greater than NG2. In the 32nd example, given the 31st example, NG1 and NG3 are equal. In the 33rd example, given the 31st example, NG1 is greater than NG3. In the 34th example, given the 31st example, NG1 is less than NG3.

In Example 4, NG2 and NG3 are different from NG1. Examples 41 to 44 are examples of details of Example 4. In Example 41, NG2 and NG3 are greater than NG1. In Example 42, assuming Example 41, NG2 and NG3 are equal. In Example 43, assuming Example 41, NG2 is greater than NG3. In Example 44, assuming Example 41, NG2 is less than NG3.

The first type through-hole P100X1 of the first group and the third type through-hole P100X3 of the third group are spaced apart in the axial direction. The second type through-hole P100X2 of the second group and the third type through-hole P100X3 of the third group are spaced apart in the axial direction.

The following illustrates an example of the configuration of the first group when NG1 is two or more. In this first example, multiple first-type through portions P100X1 are arranged at intervals in a first predetermined direction. The first predetermined direction is, for example, the axial direction or the circumferential direction.

In the second example, the multiple first-type through-portions P100X1 are arranged at intervals in both the first and second predetermined directions. The first predetermined direction is, for example, either the axial direction or the circumferential direction. The second predetermined direction is, for example, the other of the axial direction and the circumferential direction.

The following illustrates an example of the spacing between adjacent first-type through portions P100X1 in the first group in the first predetermined direction. In the first example, the spacing between adjacent first-type through portions P100X1 in the first predetermined direction is narrower than the length of the first-type through portions P100X1 in the first predetermined direction.

In the second example, the distance between adjacent first-type through portions P100X1 in the first predetermined direction is greater than the length of the first-type through portions P100X1 in the first predetermined direction. In the third example, the distance between adjacent first-type through portions P100X1 in the first predetermined direction is equal to the length of the through portions P100 in the first predetermined direction.

The following illustrates an example of the spacing between adjacent first-type through portions P100X1 in the second predetermined direction in the first group. In the first example, the spacing between adjacent first-type through portions P100X1 in the second predetermined direction is narrower than the length of the first-type through portions P100X1 in the second predetermined direction.

In the second example, the distance between adjacent first-type through portions P100X1 in the second predetermined direction is wider than the length of the first-type through portions P100X1 in the second predetermined direction. In the third example, the distance between adjacent first-type through portions P100X1 in the second predetermined direction is equal to the length of the first-type through portions P100X1 in the second predetermined direction.

The following describes an example of the configuration of the second group when NG2 is two or more. In the first example, multiple second-type through-portions P100X2 are arranged at intervals in a first predetermined direction. The first predetermined direction is, for example, the axial direction or the circumferential direction.

In the second example, the multiple second type through-holes P100X2 are arranged at intervals in both the first and second predetermined directions. The first predetermined direction is, for example, either the axial direction or the circumferential direction. The second predetermined direction is, for example, the other of the axial direction and the circumferential direction.

The following illustrates an example of the spacing between adjacent second-type through portions P100X2 in the first predetermined direction in the second group. In the first example, the spacing between adjacent second-type through portions P100X2 in the first predetermined direction is narrower than the length of the second-type through portions P100X2 in the first predetermined direction.

In the second example, the distance between adjacent second type through portions P100X2 in the first predetermined direction is greater than the length of the second type through portions P100X2 in the first predetermined direction. In the third example, the distance between adjacent second type through portions P100X2 in the first predetermined direction is equal to the length of the through portion P100 in the first predetermined direction.

The following illustrates an example of the spacing between adjacent second-type through portions P100X2 in the first group in the second predetermined direction. In the first example, the spacing between adjacent second-type through portions P100X2 in the second predetermined direction is narrower than the length of the second-type through portions P100X2 in the second predetermined direction.

In the second example, the distance between adjacent second type through portions P100X2 in the second predetermined direction is wider than the length of the second type through portions P100X2 in the second predetermined direction. In the third example, the distance between adjacent second type through portions P100X2 in the second predetermined direction is equal to the length of the second type through portions P100X2 in the second predetermined direction.

The following describes an example of the configuration of the third group when NG3 is two or more. In the first example, multiple third-type through-holes P100X3 are arranged at intervals in a first predetermined direction. The first predetermined direction is, for example, the axial direction or the circumferential direction.

In the second example, the multiple third type through-holes P100X3 are arranged at intervals in both the first and second predetermined directions. The first predetermined direction is, for example, either the axial direction or the circumferential direction. The second predetermined direction is, for example, the other of the axial direction and the circumferential direction.

The following illustrates the spacing between adjacent third-type through portions P100X3 in the third group in the first predetermined direction. In the first example, the spacing between adjacent third-type through portions P100X3 in the first predetermined direction is narrower than the length of the third-type through portions P100X3 in the first predetermined direction.

In the second example, the distance between adjacent third type through portions P100X3 in the first predetermined direction is wider than the length of the third type through portions P100X3 in the first predetermined direction. In the third example, the distance between adjacent third type through portions P100X3 in the first predetermined direction is equal to the length of the through portions P100 in the first predetermined direction.

The following illustrates the spacing between adjacent third type through portions P100X3 in the third group in the second predetermined direction. In the first example, the spacing between adjacent third type through portions P100X3 in the second predetermined direction is narrower than the length of the third type through portions P100X3 in the second predetermined direction.

In the second example, the distance between adjacent third type through portions P100X3 in the second predetermined direction is wider than the length of the third type through portions P100X3 in the second predetermined direction. In the third example, the distance between adjacent third type through portions P100X3 in the second predetermined direction is equal to the length of the third type through portions P100X3 in the second predetermined direction.

In one example, the secondary molded portion Q includes one or more partition portions Q110. The partition portions Q110 are provided between adjacent through portions P100 in the first predetermined direction or the second predetermined direction. The partition portions Q110 are joined to adjacent through portions P100.

See Figures 25 to 36. In one example, the coated portion PC includes a primary handle component P10.

The following are examples of the configuration of the first end portion PCA of the coated portion PC. In the first example, the first end portion PCA of the coated portion PC includes the first end portion P10A of the primary handle component P10. In the second example, the first end portion PCA of the coated portion PC includes the first end portion P10A of the primary handle component P10 and the first end portion P20A of the constricted portion P20.

The following are examples of the configuration of the second end PCB of the coating target portion PC. In the first example, the second end PCB of the coating target portion PC includes the second end P10B of the primary handle component P10. In the second example, the second end PCB of the coating target portion PC includes the second end P10B of the primary handle component P10 and the second end P20B of the constricted portion P20.

The following are examples of the configuration of the intermediate portion PCC of the portion to be coated PC. In the first example, the intermediate portion PCC of the portion to be coated PC includes the intermediate portion P20C of the constricted portion P20, the first end P20A, and the second end P20B. In the second example, the intermediate portion PCC of the portion to be coated PC includes the intermediate portion P20C of the constricted portion P20.

The exposed structure 500 includes a plurality of penetration portions P100 and a plurality of penetration arrangement portions Q100. The plurality of penetration portions P100 are classified into a first group, a second group, and a third group. The first group includes three penetration portions P100. The second group includes three penetration portions P100. The third group includes one penetration portion P100.

The gate-related portion of the secondary molded portion Q includes a gate mark or a gate-corresponding portion. The position of the gate-related portion in the circumferential direction is set on the back surface of the secondary molded portion Q. The back surface of the secondary molded portion Q corresponds to the gate-corresponding surface. The front surface of the secondary molded portion Q corresponds to the opposite surface. The first side surface of the secondary molded portion Q corresponds to the first intermediate surface. The second side surface of the secondary molded portion Q corresponds to the second intermediate surface. The position of the gate-related portion in the axial direction is set to the intermediate portion Q20C of the constricted portion Q20.

See Figures 25 to 28. In the illustrated example, the first end PCA of the coated portion PC includes the first end P10A of the primary handle component P10 and the first end P20A of the constricted portion P20.

The type of the through-holes P100 in the first group is Type 1A. The through-holes P100 in the first group are arranged at intervals in the axial direction. A partition portion Q110 of the secondary molded portion Q is provided between axially adjacent through-holes P100.

The first group of through-holes P100 are configured to extend in the circumferential direction. The peripheral end P120 of the first group of through-holes P100 is located in front of the portion to be coated PC. The peripheral length of the through-hole is longer than the axial length of the through-hole. The top surface P111 of the first group of through-holes P100 is a curved surface. The center of the curved surface is determined in the radially inward direction of the molded product 20.

The first group of through-holes P100 and the covering portion Q40 located around them form a recessed structure 501. Part or all of the top surface P111 of the through-holes P100 is exposed to the covering portion Q40. The side surface P112 of the through-holes P100 is covered by the covering portion Q40. The exposed surface P101 is formed by part or all of the top surface P111.

The height of the step formed between the exposed surface P101 of the penetration portion P100 and the outer surface QF of the covering portion Q40 is determined based on, for example, one or more predetermined factors related to the toothbrush 10A. Examples of predetermined factors related to the toothbrush 10A include the operability of the toothbrush 10A when using it and the design of the molded product 20.

See Figures 29 to 32. In the illustrated example, the second end PCB of the coated portion PC includes the second end P10B of the primary handle component P10 and the second end P20B of the constricted portion P20.

The type of the through-holes P100 in the second group is type 2A. The through-holes P100 in the second group are arranged at intervals in the axial direction. A partition portion Q110 of the secondary molded portion Q is provided between axially adjacent through-holes P100.

The second group of through-holes P100 are configured to extend in the circumferential direction. The peripheral end P120 of the second group of through-holes P100 is located in front of the coating target portion PC. The peripheral length of the through-hole is longer than the axial length of the through-hole. The top surface P111 of the second group of through-holes P100 is a curved surface. The center of the curved surface is determined in the radially inward direction of the molded product 20.

The second group of through-holes P100 and the covering portion Q40 located around them form a smooth structure 502. Part or all of the top surface P111 of the through-hole P100 is exposed to the covering portion Q40. The side surface P112 of the through-hole P100 is covered by the covering portion Q40. The exposed surface P101 is formed by part or all of the top surface P111.

The height of the step formed between the exposed surface P101 of the penetration portion P100 and the outer surface QF of the covering portion Q40 is determined based on, for example, one or more predetermined factors related to the toothbrush 10A. Examples of predetermined factors related to the toothbrush 10A include the operability of the toothbrush 10A when using it and the design of the molded product 20.

See Figures 33 to 36. In the illustrated example, the middle portion PCC of the portion to be covered PC includes the middle portion P20C of the constricted portion P20.

The type of the penetrating portion P100 of the third group is Type 3A. The middle portion P100C of the penetrating portion P100 is cylindrical. The axial end portion P130 of the penetrating portion P100 is located in front of the portion to be coated PC. The peripheral end portion P120 of the penetrating portion P100 is located in front of the portion to be coated PC. The top surface P111 of the penetrating portion P100 is a curved surface. The center of the curved surface is determined in the radial inward direction of the molded product 20.

The third group of through-holes P100 and the covering portion Q40 located around them form a smooth structure 502. Part or all of the top surface P111 of the through-hole P100 is exposed to the covering portion Q40. The side surface P112 of the through-hole P100 is covered by the covering portion Q40. The exposed surface P101 is formed by part or all of the top surface P111.

See Figure 1. The distance in the axial direction between the specific position of second end 110B of main body 100 and the specific position of the first group is referred to as the "specific distance." The specific distance is determined, for example, based on one or more predetermined factors related to toothbrush 10A. Examples of predetermined factors related to toothbrush 10A include operability when using toothbrush 10A and the design of molded product 20.

As a specific position of the second end 110B, for example, the end in the second axial direction of the second end 110B is selected. As a specific position of the first group, for example, the center of the first group in the axial direction is selected. As the center of the first group, for example, the center between the first axial end P131 located at the end in the first axial direction of the first group and the second axial end P132 located at the end in the second axial direction of the first group is selected.

In one example, the specific distance is set taking into consideration the operability of the toothbrush 10A when using it. One example of an aspect related to operability is the ease of gripping the handle 110. The specific distance is determined based on its relationship to the hand width of a hand set as a model (hereinafter referred to as the "reference hand width").

In one example, the specific distance is the reference hand width multiplied by a predetermined coefficient. The predetermined coefficient is selected, for example, from the range of 1 to 1.7. If the hand of a Japanese adult is set as the model hand, the reference hand width is selected, for example, from the range of 70 mm to 80 mm.

See Figure 3. When viewed from the front of the molded product 20, a line that passes through the center of the handle 110 in the axial direction and is parallel to the width direction is referred to as the "handle reference line." When viewed from the front of the molded product 20, a line that passes through the center of the neck 120 in the axial direction and is parallel to the width direction is referred to as the "neck reference line."

When viewed from the front of the molded product 20, a straight line that passes through the center of the head 130 in the axial direction and is parallel to the width direction is referred to as the "head reference line." When viewed from the front of the molded product 20, a straight line that passes through the center of the protrusion 220 in the axial direction and is parallel to the width direction is referred to as the "protrusion reference line."

The main body 100 includes a first boundary portion ZA that corresponds to the boundary between the head 130 and the neck 120. The first boundary portion ZA constitutes part of the head 130 and part of the neck 120.

The second end 130B of the head 130 includes a first boundary portion ZA. The first boundary portion ZA, which is part of the head 130, is the portion of the second end 130B of the head 130 that is the longest distance from the head reference line in the axial direction.

With regard to the second end 130B of the head 130, the range from a predetermined portion of the second end 130B located in the first axial direction relative to the first boundary ZA to the first boundary ZA is referred to as the "predetermined range of the second end 130B."

The first end 120A of the neck 120 includes a first boundary portion ZA. The first boundary portion ZA, which is part of the neck 120, is the portion of the first end 120A of the neck 120 that is farthest from the neck reference line in the axial direction.

With regard to the first end portion 120A of the neck 120, the range from a predetermined portion of the first end portion 120A located in the second axial direction relative to the first boundary portion ZA to the first boundary portion ZA is referred to as the "predetermined range of the first end portion 120A."

The main body 100 includes a first connecting portion JA. The first connecting portion JA includes a predetermined area of the second end 130B of the head 130 and a predetermined area of the first end 120A of the neck 120. Examples of the configuration of the first connecting portion JA include first to seventh configurations of the first connecting portion JA.

The first connection part JA of the first form is configured, for example, as follows:

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B increases in the second axial direction.

Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A is constant in the second axial direction.

The width of the first connection portion JA in the first form varies in the axial direction. The width of the first connection portion JA increases in a predetermined range of the second end portion 130B of the head 130 in the second axial direction, and is constant in a predetermined range of the first end portion 120A of the neck 120 in the second axial direction.

The first boundary portion ZA is located at the boundary between the portion where the width of the first connection portion JA increases in the second axial direction and the portion where the width of the first connection portion JA remains constant in the second axial direction.

The first connection part JA of the second form is configured, for example, as follows:

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B is constant in the second axial direction.

Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A increases in the second axial direction.

In the second configuration, the width of the first connecting portion JA varies in the axial direction. The width of the first connecting portion JA is constant in the second axial direction within a predetermined range of the second end 130B of the head 130, and increases in the second axial direction within a predetermined range of the first end 120A of the neck 120.

The first boundary portion ZA is located at the boundary between the portion where the width of the first connection portion JA is constant in the second axis direction and the portion where the width of the first connection portion JA increases in the second axis direction.

The first connection part JA of the third embodiment is configured, for example, as follows:

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B decreases in the second axial direction.

Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A is constant in the second axial direction.

The width of the first connection portion JA in the third form varies in the axial direction. The width of the first connection portion JA decreases in a predetermined range of the second end portion 130B of the head 130 in the second axial direction, and is constant in a predetermined range of the first end portion 120A of the neck 120 in the second axial direction.

The first boundary portion ZA is located at the boundary between the portion where the width of the first connection portion JA decreases in the second axial direction and the portion where the width of the first connection portion JA remains constant in the second axial direction.

The first connection part JA of the fourth embodiment is configured, for example, as follows:

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B is constant in the second axial direction.

Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A decreases in the second axial direction.

In the fourth configuration, the width of the first connection portion JA varies in the axial direction. The width of the first connection portion JA is constant in the second axial direction within a predetermined range of the second end portion 130B of the head 130, and becomes smaller in the second axial direction within a predetermined range of the first end portion 120A of the neck 120.

The first boundary portion ZA is located at the boundary between the portion where the width of the first connection portion JA is constant in the second axis direction and the portion where the width of the first connection portion JA decreases in the second axis direction.

The first connection part JA of the fifth embodiment is configured, for example, as follows:

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B increases in the second axial direction.

Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A decreases in the second axial direction.

The width of the first connection portion JA in the fifth form varies in the axial direction. The width of the first connection portion JA increases in a predetermined range of the second end portion 130B of the head 130 toward the second axial direction, and decreases in a predetermined range of the first end portion 120A of the neck 120 toward the second axial direction.

The first boundary portion ZA is located at the boundary between the portion where the width of the first connection portion JA increases in the second axial direction and the portion where the width of the first connection portion JA decreases in the second axial direction.

The first connection part JA of the sixth embodiment is configured, for example, as follows:

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B decreases in the second axial direction.

Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A increases in the second axial direction.

The width of the first connection portion JA in the sixth form varies in the axial direction. The width of the first connection portion JA decreases in a predetermined range at the second end 130B of the head 130 toward the second axial direction, and increases in a predetermined range at the first end 120A of the neck 120 toward the second axial direction.

The first boundary portion ZA is located at the boundary between the portion where the width of the first connection portion JA decreases in the second axial direction and the portion where the width of the first connection portion JA increases in the second axial direction.

The first connection part JA of the seventh embodiment is configured, for example, as follows:

The first connection portion JA of the seventh form includes a characteristic structural change that marks the boundary between the head 130 and the neck 120. The characteristic structural change marks the boundary between the head 130 and the neck 120 from a perspective separate from the width of the first connection portion JA.

Examples of characteristic structural changes are given below. In a first example, the characteristic structural change includes a difference between the material of the head 130 and the material of the neck 120. In a second example, the characteristic structural change includes a difference between the shape of the outer surface PF of the head 130 and the shape of the outer surface PF of the neck 120. In a third example, the characteristic structural change includes a step formed between the head 130 and the neck 120. In a fourth example, the characteristic structural change includes at least two of the first to third examples.

An example of the configuration regarding the width of the first connection portion JA in the seventh form is shown below.

In the first example, the configuration regarding the width of the first connection portion JA in the seventh embodiment is the same as the configuration regarding the width of the first connection portion JA in any of the first to sixth embodiments.

In the second example, the configuration regarding the width of the first connection portion JA in the seventh embodiment differs from the configuration regarding the width of the first connection portion JA in the first to sixth embodiments.

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B increases in the second axial direction. Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A increases in the second axial direction.

In the third example, the configuration regarding the width of the first connection portion JA in the seventh embodiment differs from the configuration regarding the width of the first connection portion JA in the first to sixth embodiments.

In a predetermined range of the second end 130B of the head 130, the width of the second end 130B decreases in the second axial direction. In a predetermined range of the first end 120A of the neck 120, the width of the first end 120A decreases in the second axial direction.

In the fourth example, the configuration regarding the width of the first connection portion JA in the seventh embodiment differs from the configuration regarding the width of the first connection portion JA in the first to sixth embodiments.

Within a predetermined range of the second end 130B of the head 130, the width of the second end 130B is constant in the second axial direction. Within a predetermined range of the first end 120A of the neck 120, the width of the first end 120A is constant in the second axial direction.

The main body 100 includes a second boundary portion ZB that corresponds to the boundary between the neck 120 and the handle 110. The second boundary portion ZB constitutes part of the neck 120 and part of the handle 110.

The second end 120B of the neck 120 includes a second boundary ZB. The second boundary ZB, which is part of the neck 120, is the portion of the second end 120B of the neck 120 that is the longest distance from the neck reference line in the axial direction.

With regard to the second end 120B of the neck 120, the range from a predetermined portion of the second end 120B located in the first axial direction relative to the second boundary ZB to the second boundary ZB is referred to as the "predetermined range of the second end 120B."

The first end 110A of the handle 110 includes a second boundary portion ZB. The second boundary portion ZB, which is part of the handle 110, is the portion of the first end 110A of the handle 110 that is farthest from the handle reference line in the axial direction.

With regard to the first end 110A of the handle 110, the range from a predetermined portion of the first end 110A located in the second axial direction relative to the second boundary ZB to the second boundary ZB is referred to as the "predetermined range of the first end 110A."

The main body 100 includes a second connection portion JB. The second connection portion JB includes a predetermined area of the second end portion 120B of the neck 120 and a predetermined area of the first end portion 110A of the handle 110. Examples of the configuration of the second connection portion JB include the first to seventh configurations of the first connection portion JA.

The second connection part JB in the first form is configured, for example, as follows:

Within a predetermined range of the second end 120B of the neck 120, the width of the second end 120B increases in the second axial direction.

Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A is constant in the second axial direction.

In the first form, the width of the second connection portion JB varies in the axial direction. The width of the second connection portion JB increases in a predetermined range of the second end portion 120B of the neck 120 in the second axial direction, and is constant in a predetermined range of the first end portion 110A of the handle 110 in the second axial direction.

The second boundary portion ZB is located at the boundary between the portion where the width of the second connection portion JB increases in the second axial direction and the portion where the width of the second connection portion JB remains constant in the second axial direction.

The second connection part JB in the second form is configured, for example, as follows:

Within a predetermined range of the second end 120B of the neck 120, the width of the second end 120B is constant in the second axial direction.

Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A increases in the second axial direction.

In the second configuration, the width of the second connection portion JB varies in the axial direction. The width of the second connection portion JB is constant in the second axial direction within a predetermined range of the second end portion 120B of the neck 120, and increases in the second axial direction within a predetermined range of the first end portion 110A of the handle 110.

The second boundary portion ZB is located at the boundary between the portion where the width of the second connection portion JB is constant in the second axial direction and the portion where the width of the second connection portion JB increases in the second axial direction.

The second connection part JB of the third embodiment is configured, for example, as follows:

In a predetermined range of the second end 120B of the neck 120, the width of the second end 120B decreases in the second axial direction.

Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A is constant in the second axial direction.

In the third configuration, the width of the second connection portion JB varies in the axial direction. The width of the second connection portion JB decreases in a predetermined range at the second end 120B of the neck 120 in the second axial direction, and is constant in a predetermined range at the first end 110A of the handle 110 in the second axial direction.

The second boundary portion ZB is located at the boundary between the portion where the width of the second connection portion JB decreases in the second axial direction and the portion where the width of the second connection portion JB remains constant in the second axial direction.

The second connection part JB of the fourth embodiment is configured, for example, as follows:

Within a predetermined range of the second end 120B of the neck 120, the width of the second end 120B is constant in the second axial direction.

Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A decreases in the second axial direction.

In the fourth configuration, the width of the second connection portion JB varies in the axial direction. The width of the second connection portion JB is constant in a predetermined range in the second axial direction at the second end 120B of the neck 120, and becomes smaller in a predetermined range in the second axial direction at the first end 110A of the handle 110.

The second boundary portion ZB is located at the boundary between the portion where the width of the second connection portion JB is constant in the second axial direction and the portion where the width of the second connection portion JB decreases in the second axial direction.

The second connection part JB of the fifth embodiment is configured, for example, as follows:

Within a predetermined range of the second end 120B of the neck 120, the width of the second end 120B increases in the second axial direction.

Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A decreases in the second axial direction.

In the fifth configuration, the width of the second connection portion JB varies in the axial direction. The width of the second connection portion JB increases in a predetermined range at the second end 120B of the neck 120 in the second axial direction, and decreases in a predetermined range at the first end 110A of the handle 110 in the second axial direction.

The second boundary portion ZB is located at the boundary between the portion where the width of the second connection portion JB increases in the second axial direction and the portion where the width of the second connection portion JB decreases in the second axial direction.

The second connection part JB of the sixth embodiment is configured, for example, as follows:

In a predetermined range of the second end 120B of the neck 120, the width of the second end 120B decreases in the second axial direction.

Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A increases in the second axial direction.

In the sixth configuration, the width of the second connection portion JB varies in the axial direction. The width of the second connection portion JB decreases in a predetermined range toward the second axial direction at the second end portion 120B of the neck 120, and increases in a predetermined range toward the second axial direction at the first end portion 110A of the handle 110.

The second boundary portion ZB is located at the boundary between the portion where the width of the second connection portion JB decreases in the second axial direction and the portion where the width of the second connection portion JB increases in the second axial direction.

The second connection part JB of the seventh embodiment is configured, for example, as follows:

The second connection portion JB of the seventh form includes a characteristic structural change that marks the boundary between the neck 120 and the handle 110. The characteristic structural change marks the boundary between the neck 120 and the handle 110 from a perspective separate from the width of the second connection portion JB.

Examples of characteristic structural changes are given below. In a first example, the characteristic structural change includes a difference between the material of the neck 120 and the material of the handle 110. In a second example, the characteristic structural change includes a difference between the shape of the outer surface PF of the neck 120 and the shape of the outer surface PF of the handle 110. In a third example, the characteristic structural change includes a step formed between the neck 120 and the handle 110. In a fourth example, the characteristic structural change includes at least two of the first to third examples.

An example of the configuration regarding the width of the second connection portion JB in the seventh embodiment is shown below.

In the first example, the configuration regarding the width of the second connection portion JB in the seventh embodiment is the same as the configuration regarding the width of the second connection portion JB in any of the first to sixth embodiments.

In the second example, the configuration regarding the width of the second connection portion JB in the seventh embodiment differs from the configuration regarding the width of the second connection portion JB in the first to sixth embodiments.

In a predetermined range of the second end 120B of the neck 120, the width of the second end 120B increases in the second axial direction. In a predetermined range of the first end 110A of the handle 110, the width of the first end 110A increases in the second axial direction.

In the third example, the configuration regarding the width of the second connection portion JB in the seventh embodiment differs from the configuration regarding the width of the second connection portion JB in the first to sixth embodiments.

In a predetermined range of the second end 120B of the neck 120, the width of the second end 120B decreases in the second axial direction. In a predetermined range of the first end 110A of the handle 110, the width of the first end 110A decreases in the second axial direction.

In the fourth example, the configuration regarding the width of the second connection portion JB in the seventh embodiment differs from the configuration regarding the width of the second connection portion JB in the first to sixth embodiments.

Within a predetermined range of the second end 120B of the neck 120, the width of the second end 120B is constant in the second axial direction. Within a predetermined range of the first end 110A of the handle 110, the width of the first end 110A is constant in the second axial direction.

The main body 100 includes a third boundary ZC that corresponds to the boundary between the handle 110 and the protrusion 220. The third boundary ZC constitutes part of the handle 110 and part of the protrusion 220.

The second end 110B of the handle 110 includes a third boundary ZC. The third boundary ZC, which is part of the handle 110, is the portion of the second end 110B of the handle 110 that is the longest distance from the handle reference line in the axial direction.

With regard to the second end 110B of the handle 110, the range from a specific portion of the second end 110B located in the first axial direction relative to the third boundary ZC to the third boundary ZC is referred to as the "specific range of the second end 110B."

The first end 220A of the protrusion 220 includes a third boundary ZC. The third boundary ZC, which is part of the protrusion 220, is the portion of the first end 220A of the protrusion 220 that is farthest from the protrusion reference line in the axial direction.

With regard to the first end 220A of the protrusion 220, the range from a predetermined portion of the first end 220A located in the second axial direction relative to the third boundary ZC to the third boundary ZC is referred to as the "predetermined range of the first end 220A."

The main body 100 includes a third connection portion JC. The third connection portion JC includes a predetermined range of the second end portion 110B of the handle 110 and a predetermined range of the first end portion 220A of the protrusion 220. Examples of the configuration of the third connection portion JC include first to seventh configurations of the third connection portion JC.

The third connection part JC in the first form is configured, for example, as follows:

Within a certain range of the second end 110B of the handle 110, the width of the second end 110B increases in the second axial direction.

Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A is constant in the second axial direction.

The width of the third connection portion JC in the first form varies in the axial direction. The width of the third connection portion JC increases in a predetermined range of the second end portion 110B of the handle 110 in the second axial direction, and is constant in a predetermined range of the first end portion 220A of the protrusion 220 in the second axial direction.

The third boundary portion ZC is located at the boundary between the portion where the width of the third connection portion JC increases in the second axial direction and the portion where the width of the third connection portion JC remains constant in the second axial direction.

The third connection part JC in the second form is configured, for example, as follows:

Within a predetermined range of the second end 110B of the handle 110, the width of the second end 110B is constant in the second axial direction.

Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A increases in the second axial direction.

In the second configuration, the width of the third connection portion JC varies in the axial direction. The width of the third connection portion JC is constant in the second axial direction within a predetermined range of the second end portion 110B of the handle 110, and increases in the second axial direction within a predetermined range of the first end portion 220A of the protrusion 220.

The third boundary portion ZC is located at the boundary between the portion where the width of the third connection portion JC is constant in the second axial direction and the portion where the width of the third connection portion JC increases in the second axial direction.

The third connection part JC of the third form is configured, for example, as follows:

Within a certain range of the second end 110B of the handle 110, the width of the second end 110B decreases in the second axial direction.

Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A is constant in the second axial direction.

The width of the third connection portion JC in the third form varies in the axial direction. The width of the third connection portion JC decreases in a predetermined range at the second end 110B of the handle 110 in the second axial direction, and is constant in a predetermined range at the first end 220A of the protrusion 220 in the second axial direction.

The third boundary portion ZC is located at the boundary between the portion where the width of the third connection portion JC decreases in the second axial direction and the portion where the width of the third connection portion JC remains constant in the second axial direction.

The third connection part JC of the fourth form is configured, for example, as follows:

Within a predetermined range of the second end 110B of the handle 110, the width of the second end 110B is constant in the second axial direction.

Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A decreases in the second axial direction.

In the fourth configuration, the width of the third connection portion JC varies in the axial direction. The width of the third connection portion JC is constant in the second axial direction within a predetermined range of the second end portion 110B of the handle 110, and becomes smaller in the second axial direction within a predetermined range of the first end portion 220A of the protrusion 220.

The third boundary portion ZC is located at the boundary between the portion where the width of the third connection portion JC is constant in the second axial direction and the portion where the width of the third connection portion JC decreases in the second axial direction.

The third connection part JC of the fifth embodiment is configured, for example, as follows:

Within a certain range of the second end 110B of the handle 110, the width of the second end 110B increases in the second axial direction.

Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A decreases in the second axial direction.

The width of the third connection portion JC in the fifth form varies in the axial direction. The width of the third connection portion JC increases in a predetermined range at the second end 110B of the handle 110 in the second axial direction, and decreases in a predetermined range at the first end 220A of the protrusion 220 in the second axial direction.

The third boundary portion ZC is located at the boundary between the portion where the width of the third connection portion JC increases in the second axial direction and the portion where the width of the third connection portion JC decreases in the second axial direction.

The third connection part JC of the sixth embodiment is configured, for example, as follows:

Within a certain range of the second end 110B of the handle 110, the width of the second end 110B decreases in the second axial direction.

Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A increases in the second axial direction.

In the sixth configuration, the width of the third connection portion JC varies in the axial direction. The width of the third connection portion JC decreases in a predetermined range toward the second axial direction at the second end 110B of the handle 110, and increases in a predetermined range toward the second axial direction at the first end 220A of the protrusion 220.

The third boundary portion ZC is located at the boundary between the portion where the width of the third connection portion JC decreases in the second axial direction and the portion where the width of the third connection portion JC increases in the second axial direction.

The third connection part JC of the seventh embodiment is configured, for example, as follows:

The third connection portion JC of the seventh form includes a characteristic structural change that indicates the boundary between the handle 110 and the protrusion 220. The characteristic structural change indicates the boundary between the handle 110 and the protrusion 220 from a perspective separate from the width of the third connection portion JC.

Examples of characteristic structural changes are given below. In a first example, the characteristic structural change includes a difference between the material of the handle 110 and the material of the protrusion 220. In a second example, the characteristic structural change includes a difference between the shape of the outer surface PF of the handle 110 and the shape of the outer surface PF of the protrusion 220. In a third example, the characteristic structural change includes a step formed between the handle 110 and the protrusion 220. In a fourth example, the characteristic structural change includes at least two of the first to third examples.

An example of the configuration regarding the width of the third connection part JC in the seventh form is shown below.

In the first example, the configuration regarding the width of the third connection part JC in the seventh embodiment is the same as the configuration regarding the width of the third connection part JC in any of the first to sixth embodiments.

In the second example, the configuration regarding the width of the third connection part JC in the seventh embodiment differs from the configuration regarding the width of the third connection part JC in the first to sixth embodiments.

Within a predetermined range of the second end 110B of the handle 110, the width of the second end 110B increases in the second axial direction. Within a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A increases in the second axial direction.

In the third example, the configuration regarding the width of the third connection part JC in the seventh embodiment differs from the configuration regarding the width of the third connection part JC in the first to sixth embodiments.

In a predetermined range of the second end 110B of the handle 110, the width of the second end 110B decreases in the second axial direction. In a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A decreases in the second axial direction.

In the fourth example, the configuration regarding the width of the third connection part JC in the seventh embodiment differs from the configuration regarding the width of the third connection part JC in the first to sixth embodiments.

Over a predetermined range of the second end 110B of the handle 110, the width of the second end 110B is constant in the second axial direction. Over a predetermined range of the first end 220A of the protrusion 220, the width of the first end 220A is constant in the second axial direction.

If the position of the first boundary ZA in the axial direction is not defined by the above example, the position of the first boundary ZA can be defined, for example, by the following method.

The distance between the tip 130P of the head 130 and the first boundary ZA in the axial direction is referred to as the "first reference length." The length of the molded product 20 in the axial direction is referred to as the "molded product length." The ratio of the first reference length to the molded product length is referred to as the "first reference length ratio."

In one example of a molded product 20 in a state where the protrusion 220 has not been removed, the position of the first boundary ZA in the axial direction is determined so that the first reference length ratio is within the range of 14% to 54%.

In one example of a molded product 20 with the protrusion 220 removed, the position of the first boundary ZA in the axial direction is determined so that the first reference length ratio is within the range of 14% to 54%.

If the position of the second boundary ZB in the axial direction is not defined by the above example, the position of the second boundary ZB can be defined, for example, by the following method.

The distance in the axial direction between the tip 130P of the head 130 and the second boundary ZB is referred to as the "second reference length." The ratio of the second reference length to the length of the molded product is referred to as the "second reference length ratio."

In one example of a molded product 20 in a state where the protrusion 220 has not been removed, the position of the second boundary ZB in the axial direction is determined so that the second reference length ratio is within the range of 28% to 68%.

In one example of a molded product 20 with the protrusion 220 removed, the position of the second boundary ZB in the axial direction is determined so that the second reference length ratio is within the range of 29% to 69%.

If the position of the third boundary ZC in the axial direction is not defined by the above example, the position of the third boundary ZC can be defined, for example, by the following method.

The distance in the axial direction between the tip 130P of the head 130 and the third boundary ZC is referred to as the "third reference length." The ratio of the third reference length to the length of the molded product is referred to as the "third reference length ratio."

In one example of a molded product 20 in a state where the protrusion 220 has not been removed, the position of the third boundary ZC in the axial direction is determined so that the third reference length ratio is within the range of 56% to 96%.

The first end 130A of the head 130 includes a tip portion 130P. The tip portion 130P is the portion of the first end 130A of the head 130 that is the longest distance from the head reference line in the axial direction.

The length of the head 130 in the axial direction is defined, for example, as follows: The length of the head 130 in the axial direction is the distance between the tip 130P of the head 130 and the first boundary ZA in the axial direction.

The length of the neck 120 in the axial direction is defined, for example, as follows: The length of the neck 120 in the axial direction is the distance between the second boundary ZB and the first boundary ZA in the axial direction.

The length of the handle 110 in the axial direction is defined, for example, as follows: The length of the handle 110 in the axial direction is the distance between the second boundary ZB and the third boundary ZC in the axial direction.

The second end 220B of the protrusion 220 includes a tip 220P. The tip 220P is the portion of the second end 220B of the protrusion 220 that is the longest distance from the protrusion reference line in the axial direction.

The length of the protrusion 220 in the axial direction is defined, for example, as follows: The length of the protrusion 220 in the axial direction is the distance between the third boundary ZC in the axial direction and the tip 220P.

In the example shown in Figures 3 and 4, each of the connection parts JA to JC is configured as follows. The configuration of the first connection part JA is the third configuration of the first connection part JA described above. The configuration of the second connection part JB is the seventh configuration of the second connection part JB described above. A distinctive structural change includes a difference between the material of the neck 120 and the material of the handle 110. The configuration of the third connection part JC is the third configuration of the third connection part JC described above.

The length of each portion of the molded product 20 in the axial direction can be selected as desired. The length of each portion of the molded product 20 in the axial direction is not limited to the lengths shown in the examples.

In one example, the axial length of the handle 110 is longer than the axial length of the neck 120. The axial length of the neck 120 is longer than the axial length of the head 130.

In one example, the length of the protrusion 220 in the axial direction is shorter than the length of the main body 100 in the axial direction. The length of the protrusion 220 in the axial direction is shorter than the length of the handle 110 in the axial direction. The length of the protrusion 220 in the axial direction is shorter than the length of the neck 120 in the axial direction. The length of the protrusion 220 in the axial direction is shorter than the length of the head 130 in the axial direction. The length of the protrusion 220 in the axial direction is shorter than the length of the main body protrusion P40 in the axial direction.

Examples of movement of the secondary molding part Q relative to the primary molding part P include movement of the secondary molding part Q relative to the primary molding part P and rotation of the secondary molding part Q relative to the primary molding part P. Movement of the secondary molding part Q relative to the primary molding part P is referred to as "relative movement of the secondary molding part Q." Rotation of the secondary molding part Q relative to the primary molding part P is referred to as "relative rotation of the secondary molding part Q."

Examples of relative movement of the secondary molding portion Q include type 1 relative movement, type 2 relative movement, and type 3 relative movement.

The first type of relative movement is movement of the secondary molding part Q relative to the primary molding part P in a direction that includes at least an axial component.

The second type of relative movement is movement of the secondary molding part Q relative to the primary molding part P in a direction that includes at least a widthwise component.

The third type of relative movement is movement of the secondary molding part Q relative to the primary molding part P in a direction that includes at least a component in the thickness direction.

Examples of relative rotation of the secondary molding portion Q include first-type relative rotation and second-type relative rotation.

The first type of relative rotation is the rotation of the secondary molding part Q relative to the primary molding part P in a direction that includes at least a first circumferential component.

The second type of relative rotation is a rotation of the secondary molding part Q relative to the primary molding part P in a direction that includes at least a second circumferential component.

See Figures 7 and 8. The molded product 20 includes a restricting structure R. The configuration of the restricting structure R can be selected as desired. The configuration of the restricting structure R is not limited to the configuration shown in the example. The restricting structure R is configured to restrict the movement of the secondary molded portion Q relative to the primary molded portion P. In one example, the restricting structure R is configured to restrict at least one of the relative movement of the secondary molded portion Q and the relative rotation of the secondary molded portion Q.

The restricting structure R may, for example, include one or more types of unique restricting structures. Each unique restricting structure may include a different structure. Each unique restricting structure is configured to restrict at least one of the relative movement of the secondary molded portion Q and the relative rotation of the secondary molded portion Q.

The inherent restriction structure is provided in the primary molded portion P or the secondary molded portion Q. Examples of inherent restriction structures provided in the primary molded portion P include a step portion R10, a diameter change portion R20, a surface undulation portion R30, a protrusion R40, a placement portion R50 (see Figure 37, etc.), and an undercut portion R60 (see Figure 46, etc.). An example of an inherent restriction structure provided in the secondary molded portion Q is a circumferential portion RQ.

In one example, the covering portion Q40 is configured to cover the regulating structure R. The covering portion Q40 covers one or more of several types of unique regulating structures.

In the illustrated example, the regulating structure R includes multiple types of unique regulating structures. The regulating structure R includes a step portion R10, a diameter changing portion R20, a surface undulation portion R30, a protrusion R40, and a circumferential portion RQ.

The configuration of the step portion R10 can be selected arbitrarily. The configuration of the step portion R10 is not limited to the configuration shown in the example. The step portion R10 is configured to restrict at least one of the relative movement of the secondary molded portion Q and the relative rotation of the secondary molded portion Q.

The step R10 is provided in the primary molded part P. The step R10 includes an intermediate surface. The intermediate surface is a surface provided between the upper part of the step R10 and the lower part of the step R10. The secondary molded part Q includes an end surface facing the intermediate surface of the step R10 of the primary molded part P. The end surface of the secondary molded part Q is provided at the end of the secondary molded part Q. In examples where a step is provided in the secondary molded part Q, the step of the secondary molded part Q includes an end surface. Examples 1 to 7 can be given as examples of the configuration of the step R10.

In a first example, the step portion R10 is configured to restrict a first type of relative movement. In a second example, the step portion R10 is configured to restrict a second type of relative movement. In a third example, the step portion R10 is configured to restrict a third type of relative movement. In a fourth example, the step portion R10 is configured to include at least two of the configurations of the first to third examples.

In the fifth example, the step portion R10 is configured to restrict a first type of relative rotation. In the sixth example, the step portion R10 is configured to restrict a second type of relative rotation. In the seventh example, the step portion R10 is configured to include both the configurations of the fifth and sixth examples.

In the illustrated example, the restricting structure R includes one step R10. The step P11 of the primary molding part P corresponds to the step R10 of the restricting structure R. The covering part Q40 covers the middle surface of the step R10 and the lower part of the step R10.

The configuration of the diameter change portion R20 can be selected arbitrarily. The configuration of the diameter change portion R20 is not limited to the configuration shown in the example. The diameter change portion R20 is configured to restrict the first relative movement.

The diameter changing portion R20 is provided in the primary molding portion P. The diameter changing portion R20 is configured so that the outer diameter changes in the axial direction. Examples of the diameter changing portion R20 include Example 1 and Example 2.

In the first example, the diameter changing portion R20 is configured to restrict the relative movement in the first axial direction, which is one of the first-type relative movements. In the diameter changing portion R20, the outer diameter of the primary molded portion P increases in the first axial direction.

In the second example, the diameter changing portion R20 is configured to restrict the relative movement in the second axial direction, which is one of the first-type relative movements. In the diameter changing portion R20, the outer diameter of the primary molded portion P increases in the second axial direction.

The restricting structure R includes one or more diameter changing portions R20. Examples of the diameter changing portions R20 include a first diameter changing portion R21, a second diameter changing portion R22, a third diameter changing portion R23, and a fourth diameter changing portion R24.

The first diameter change portion R21 is configured to restrict relative movement of the secondary molded portion Q in the first axial direction or the second axial direction. The first diameter change portion R21 is positioned in the first axial direction relative to the other diameter change portions R20. In one example, the first diameter change portion R21 is provided in the primary handle component P10, the neck 120, or the head 130.

The second diameter changing portion R22 is configured to restrict relative movement of the secondary molded portion Q in the first axial direction or the second axial direction. The second diameter changing portion R22 is located in the second axial direction relative to the first diameter changing portion R21. In one example, the second diameter changing portion R22 is provided in the primary handle component P10, the neck 120, or the head 130.

The third diameter change portion R23 is configured to restrict relative movement of the secondary molded portion Q in the first axial direction or the second axial direction. The third diameter change portion R23 is located in the second axial direction relative to the second diameter change portion R22. In one example, the third diameter change portion R23 is provided in the primary handle component P10, the neck 120, or the head 130.

The fourth diameter change portion R24 is configured to restrict relative movement of the secondary molded portion Q in the first axial direction or the second axial direction. The fourth diameter change portion R24 is located in the second axial direction relative to the second diameter change portion R22. In one example, the fourth diameter change portion R24 is provided in the primary handle component P10, the neck 120, or the head 130.

The direction of relative movement of the secondary molding portion Q restricted by the diameter changing portion R20 is referred to as the "restriction direction."

The following illustrates an example of the relationship between the restricting directions of the diameter change portions R20 when the restricting structure R includes a first diameter change portion R21 and a second diameter change portion R22.

In the first example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same direction as the restricting direction in the first diameter changing portion R21.

In the second example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21.

The following illustrates an example of the relationship between the restricting directions of each diameter change portion R20 when the restricting structure R includes a first diameter change portion R21, a second diameter change portion R22, and a third diameter change portion R23.

In the first example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the same direction as the restricting direction in the first diameter changing portion R21.

In the second example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the same direction as the restricting direction in the first diameter changing portion R21.

In the third example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the opposite direction to the restricting direction in the first diameter changing portion R21.

In the fourth example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the opposite direction to the restricting direction in the first diameter changing portion R21.

The following illustrates an example of the relationship between the restricting directions of each diameter change portion R20 in a configuration in which the restricting structure R includes a first diameter change portion R21, a second diameter change portion R22, a third diameter change portion R23, and a fourth diameter change portion R24.

In the first example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the same direction as the restricting direction in the first diameter changing portion R21.

In the second example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the same direction as the restricting direction in the first diameter changing portion R21.

In the third example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the same direction as the restricting direction in the first diameter changing portion R21.

In the fourth example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same as the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the same as the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the opposite direction to the restricting direction in the first diameter changing portion R21.

In the fifth example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the same direction as the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the opposite direction to the restricting direction in the first diameter changing portion R21.

In the sixth example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the same direction as the restricting direction in the first diameter changing portion R21.

In the seventh example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the same as the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the opposite direction to the restricting direction in the first diameter changing portion R21.

In the eighth example, the restricting direction in the first diameter changing portion R21 is the first axial direction or the second axial direction. The restricting direction in the second diameter changing portion R22 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the third diameter changing portion R23 is the opposite direction to the restricting direction in the first diameter changing portion R21. The restricting direction in the fourth diameter changing portion R24 is the opposite direction to the restricting direction in the first diameter changing portion R21.

In the illustrated example, the restriction structure R includes a first diameter change portion R21 to a fourth diameter change portion R24. The covering portion Q40 covers the first diameter change portion R21 to the fourth diameter change portion R24.

The first end P20A and part of the intermediate portion P20C of the constricted portion P20 correspond to the first diameter changing portion R21. Part of the intermediate portion P20C is located in the first axial direction relative to the narrowest part of the constricted portion P20.

The second end P20B and part of the intermediate portion P20C of the constricted portion P20 correspond to the second diameter changing portion R22. Part of the intermediate portion P20C is located in the second axial direction relative to the narrowest part of the constricted portion P20.

The tapered portion P30 of the primary molded portion P corresponds to the third diameter change portion R23. The main body protrusion P40 of the primary molded portion P corresponds to the fourth diameter change portion R24.

The configuration of the surface undulations R30 can be selected arbitrarily. The configuration of the surface undulations R30 is not limited to the configuration shown in the example. The surface undulations R30 is configured to restrict the relative movement and relative rotation of the secondary molded portion Q.

The surface undulations R30 are provided in the primary molding part P. The surface undulations R30 are configured to impart irregularities to the outer surface PF of the primary molding part P.

In the illustrated example, the regulating structure R includes one surface undulation portion R30. The surface undulation portion 410 of the primary molding portion P corresponds to the surface undulation portion R30 of the regulating structure R. One surface undulation portion 410 is composed of a group of multiple adjacent geometrically shaped surfaces 420 that share a side or vertex. The covering portion Q40 covers the surface undulation portion R30.

The configuration of the protrusion R40 can be selected arbitrarily. The configuration of the protrusion R40 is not limited to the configuration shown in the example. The protrusion R40 is configured to restrict the relative movement and relative rotation of the secondary molded portion Q.

The protrusion R40 is provided on the primary molding part P. The protrusion R40 is configured to protrude from the outer surface PF of the primary molding part P in a direction intersecting the central axis of the primary molding part P.

Examples A and B are examples of configurations in which the regulating structure R includes multiple protrusions R40. In Example A, the multiple protrusions R40 are arranged regularly. In Example B, the multiple protrusions R40 are arranged irregularly. Details of Example A include Examples A1 to A11.

In Example A1, the regulating structure R includes a group of multiple protrusions R40 aligned in the axial direction. In Example A2, the regulating structure R includes multiple groups of Example A1.

In Example A3, the regulating structure R includes a group of multiple protrusions R40 aligned in the width direction. In Example A4, the regulating structure R includes multiple groups of Example A3.

In Example A5, the regulating structure R includes a group of multiple protrusions R40 aligned in the thickness direction. In Example A6, the regulating structure R includes multiple groups of Example A5.

In Example A7, the regulating structure R includes a group of multiple protrusions R40 aligned in the circumferential direction. In Example A8, the regulating structure R includes multiple groups of Example A7.

In Example A9, the regulating structure R includes a group of multiple protrusions R40 aligned in a different direction than in Examples A1 to A8. In Example A10, the regulating structure R includes multiple groups of Example A9.

In Example A11, the regulatory structure R includes at least two of the configurations in Examples A1 to A10. In Example A12, the regulatory structure R includes at least one of the configurations in Examples A1 to A11 and the configuration in Example B.

In the illustrated example, the restricting structure R includes multiple protrusions R40. The protrusion P13 of the primary molding part P corresponds to the protrusion R40 of the restricting structure R. The covering part Q40 covers the multiple protrusions R40.

The configuration of the circumferential portion RQ can be selected arbitrarily. The configuration of the circumferential portion RQ is not limited to the configuration shown in the example. The circumferential portion RQ is configured to restrict the relative movement and relative rotation of the secondary molding portion Q.

The circumferential portion RQ is provided on the secondary molded portion Q. The circumferential portion RQ is configured to extend in the circumferential direction. The circumferential portion RQ increases the bonding area between the primary molded portion P and the secondary molded portion Q in the circumferential direction, thereby restricting the relative movement and relative rotation of the secondary molded portion Q.

In one example, the circumferential portion RQ is configured so that the outer surface PF of the primary molded portion P located around the circumferential portion RQ is continuous with the outer surface QF of the circumferential portion RQ. A portion of the outer surface 20F of the molded product 20, which is composed of the outer surface QF of the circumferential portion RQ and the outer surface PF of the primary molded portion P located around the circumferential portion RQ, is a smooth surface.

Examples of the circumferential portion RQ include Example A and Example B. In Example A, the circumferential portion RQ is configured to make one full turn around the primary molded portion P. Figure 37 shows an example of Example A. In Example B, the length of the circumferential portion RQ in the circumferential direction is shorter than one turn around the primary molded portion P. Figure 40 shows an example of Example B. The circumferential portion RQ in Example B includes a first circumferential end Q41 and a second circumferential end Q42 in the circumferential direction.

In one example, the first peripheral end Q41 is configured so that the outer surface PF of the primary molded portion P located around the first peripheral end Q41 is continuous with the outer surface QF of the first peripheral end Q41. A portion of the outer surface 20F of the molded product 20, which is formed by the outer surface QF of the first peripheral end Q41 and the outer surface PF of the primary molded portion P located around the first peripheral end Q41, is a smooth surface.

In one example, the second peripheral end Q42 is configured so that the outer surface PF of the primary molded part P located around the second peripheral end Q42 is continuous with the outer surface QF of the second peripheral end Q42. A portion of the outer surface 20F of the molded product 20, which is formed by the outer surface QF of the second peripheral end Q42 and the outer surface PF of the primary molded part P located around the second peripheral end Q42, is a smooth surface.

In a cross section of the molded product 20 parallel to the third reference plane, the line segment connecting the central axis of the primary molded portion P and the portion of the first circumferential end Q41 closest to the central axis of the primary molded portion P is referred to as the "first line segment." In a cross section of the molded product 20 parallel to the third reference plane, the line segment connecting the central axis of the primary molded portion P and the portion of the second circumferential end Q42 closest to the central axis of the primary molded portion P is referred to as the "second line segment." In a cross section of the molded product 20 parallel to the third reference plane, the angle between the first line segment and the second line segment is referred to as the "orbital angle."

In detailing Example B, the rotation angle is included in a predetermined range of rotation angles. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit rotation angle. In the second example, the predetermined range is equal to or less than the upper limit rotation angle. In the third example, the predetermined range is equal to or greater than the lower limit rotation angle and equal to or less than the upper limit rotation angle.

The lower limit rotation angle is selected from, for example, 5°, 10°, or 15°. The upper limit rotation angle is selected from, for example, 180°, 270°, or 355°. Examples of the predetermined range for the third example include Examples 3A to 3I below.

In Example 3A, the specified range is 5° to 180°. In Example 3B, the specified range is 5° to 270°. In Example 3C, the specified range is 5° to 355°.

In Example 3D, the specified range is 10° to 180°. In Example 3E, the specified range is 10° to 270°. In Example 3F, the specified range is 10° to 355°.

In Example 3G, the specified range is 15° to 180°. In Example 3H, the specified range is 15° to 270°. In Example 3I, the specified range is 15° to 355°.

In the illustrated example, the regulating structure R includes one circumferential portion RQ. The covering portion Q40 that wraps around the primary handle component P10 corresponds to the circumferential portion RQ of the regulating structure R.

See Figures 1 to 8. The molded product 20 is formed by injection molding. The manufacturing method for the molded product 20 includes, for example, a primary molding process, a secondary molding process, and a removal process. The secondary molding process is performed after the primary molding process. The removal process is performed after the secondary molding process.

A primary mold is used in the primary molding process. The primary mold forms the primary molded portion P. The primary mold includes, for example, a fixed mold, a movable mold, and one or more ejector pins. The primary mold includes the same number of ejector pins as the number of pressed portions included in the pressed structure 200.

A secondary mold is used in the secondary molding process. The secondary mold forms the secondary molded portion Q. The secondary mold includes, for example, a fixed mold, a movable mold, and one or more ejector pins. The secondary mold includes the same number of ejector pins as the number of pressed portions included in the pressed structure 200.

The movable mold can move in a first predetermined direction relative to the fixed mold. The first predetermined direction includes a closing direction and an opening direction. The closing direction is the direction in which the movable mold approaches the fixed mold. The opening direction is the direction opposite to the closing direction.

The multiple ejector pins include, for example, a first ejector pin and a second ejector pin. The first ejector pin corresponds to the specific portion 210 of the pressed structure 200. The tip surface of the first ejector pin is, for example, a flat surface. The second ejector pin corresponds to the protrusion 220 of the pressed structure 200. The tip surface of the second ejector pin is, for example, a flat surface.

The multiple ejector pins can move relative to the movable mold in a second predetermined direction. The second predetermined direction includes an extrusion direction and a retraction direction. The extrusion direction is the direction in which the multiple ejector pins protrude from the movable mold. The retraction direction is the direction opposite to the extrusion direction.

The primary molding process includes, for example, steps A1 to A5. Step A2 is performed after step A1. Step A3 is performed after step A2. Step A4 is performed after step A3. Step A5 is performed after step A4. Steps A1 to A4 correspond to the molding process and primary molding process. Step A5 corresponds to the extrusion process and primary extrusion process.

In step A1, the primary mold is clamped. During clamping, the movable mold moves in the closing direction relative to the fixed mold. A primary cavity is formed between the movable mold and the fixed mold. The shape of the primary cavity corresponds to the shape of the primary molding part P.

In process A2, the resin material corresponding to the primary molding portion P is filled into the primary cavity. The molten resin material flows through the primary cavity.

In step A3, the filled resin material is cooled and solidified. The primary molded part P shown in Figure 7 is formed in the primary cavity. A parting line is formed in the primary molded part P at the boundary between the movable mold and the fixed mold.

In step A4, the primary mold is opened. During mold opening, the movable mold moves in the opening direction relative to the fixed mold. The movable mold moves away from the fixed mold.

In process A5, the first ejector pin and second ejector pin move in the extrusion direction relative to the movable mold. The first ejector pin pushes the specific portion 210 of the primary molded part P in the extrusion direction. The second ejector pin pushes the protruding portion 220 of the primary molded part P in the extrusion direction. The primary molded part P separates from the movable mold and is removed from the primary mold. The primary molded part P is set in the movable mold of the secondary mold.

When the protrusion 220 is configured as a separate part from the gate of the primary molding part P, in one example, the gate of the primary molding part P is connected to the back surface of the first end P10A of the primary handle component P10. The gate of the primary molding part P is removed before the primary molding part P is set in the movable part of the secondary mold. When the protrusion 220 includes the gate of the primary molding part P, the primary molding part P is set in the movable part of the secondary mold without removing the gate.

The secondary molding process includes, for example, steps B1 to B5. Step B2 is performed after step B1. Step B3 is performed after step B2. Step B4 is performed after step B3. Step B5 is performed after step B4. Steps B1 to B4 correspond to the molding process and secondary molding process. Step B5 corresponds to the extrusion process and secondary extrusion process.

In step B1, the secondary mold is clamped. During clamping, the movable mold moves in the closing direction relative to the fixed mold. A secondary cavity is formed between the movable mold and the fixed mold. The secondary cavity is formed around the primary handle component P10 of the primary molded part P. The shape of the secondary cavity corresponds to the shape of the secondary molded part Q.

The primary molding part P is fixed to the secondary mold. The state in which the primary molding part P is fixed to the secondary mold is called the "fixed state." In the fixed state, the part of the primary molding part P located in the first axial direction relative to the secondary cavity and the part of the primary molding part P located in the second axial direction relative to the secondary cavity are fixed to the secondary mold.

The neck 120 and head 130 are positioned in a first axial direction relative to the secondary cavity. The neck 120 and head 130 are fixed to the secondary mold. The protrusion 220 is positioned in a second axial direction relative to the secondary cavity. The protrusion 220 is fixed to the secondary mold.

In process B2, the resin material corresponding to the secondary molded portion Q is filled into the secondary cavity. The molten resin material flows through the secondary cavity.

In process B3, the filled resin material is cooled and solidified. In the secondary cavity, a secondary molded portion Q is molded on the outer surface PF of the primary molded portion P. By molding the secondary molded portion Q, the molded product 20 shown in Figure 3 is formed. A parting line is formed in the secondary molded portion Q at the portion corresponding to the boundary between the movable mold and the fixed mold.

In process B4, the secondary mold is opened. During mold opening, the movable mold moves in the opening direction relative to the fixed mold. The movable mold moves away from the fixed mold.

In process B5, the first ejector pin and the second ejector pin move in the extrusion direction relative to the movable mold. The first ejector pin pushes the specific portion 210 of the pressed structure 200 in the extrusion direction. The second ejector pin pushes the protruding portion 220 of the pressed structure 200 in the extrusion direction. The molded product 20 separates from the movable mold and is removed from the secondary mold. The molded product 20 is set in a cutting device.

In the removal process, the protrusion 220 of the molded product 20 is removed using a cutting device. By performing the removal process, the molded product 20 shown in Figure 1 is produced.

The manufacturing method for toothbrush 10A includes, for example, a fixing process. This process is carried out after the manufacturing method for molded product 20 is carried out. In this process, multiple tufts are fixed to the head 130 of molded product 20. By carrying out this fixing process, the toothbrush 10A shown in Figure 1 is manufactured.

(Effect 1)
The configurations exemplified in the respective embodiments provide the following advantages, for example.

In the secondary molding process, resin material corresponding to the secondary molded portion Q is supplied around the primary molded portion P. The force applied to the primary molded portion P from the resin material corresponding to the secondary molded portion Q may cause deformation of the coated portion PC of the primary molded portion P. Deformation of the primary molded portion P that occurs in the secondary molding process is referred to as "deformation during secondary molding." A primary molded portion P that has undergone deformation during secondary molding is referred to as an "irregularly shaped primary molded portion P."

In terms of whether or not secondary molding deformation occurs, the state of the molded product 20 is classified into a state in which secondary molding deformation occurs and a state in which secondary molding deformation does not occur. Secondary molding deformation is classified, for example, into vertical deformation, horizontal deformation, and combined deformation based on the direction of deformation.

Longitudinal deformation is deformation in the thickness direction. Lateral deformation is deformation in the width direction. Combined deformation includes both longitudinal and lateral deformation. A deformed primary molded part P that has undergone longitudinal deformation includes a portion that is biased in the thickness direction relative to the undeformed primary molded part P. A deformed primary molded part P that has undergone lateral deformation includes a portion that is biased in the width direction relative to the undeformed primary molded part P.

The presence or absence of vertical or horizontal deformation of the primary molded portion P in the molded product 20 can be confirmed, for example, as follows: The shape of the primary molded portion P of the molded product 20 when viewed from the front is compared with the design shape of the primary molded portion P. Examples of comparison methods include visual inspection or image analysis.

If the primary molded portion P of the molded product 20 contains a portion that is biased in the thickness direction relative to the designed primary molded portion P, that primary molded portion P is determined to correspond to an irregularly shaped primary molded portion P in which vertical deformation has occurred.

If the primary molded portion P of the molded product 20 contains a portion that is biased in the width direction relative to the designed primary molded portion P, that primary molded portion P is determined to correspond to an irregularly shaped primary molded portion P that has undergone lateral deformation.

A state in which deformation occurs during secondary molding refers to a state in which vertical deformation, horizontal deformation, or combined deformation occurs. A state in which deformation does not occur during secondary molding refers to a state in which vertical deformation, horizontal deformation, or combined deformation does not occur.

A state in which deformation during secondary molding is suppressed refers to a state in which no longitudinal, lateral, or combined deformation occurs, or a state in which the degree of longitudinal, lateral, or combined deformation is small. A state in which the degree of longitudinal, lateral, or combined deformation is small refers to a state in which the amount of deformation of molded article 20 due to longitudinal, lateral, or combined deformation is small compared to a molded article 20 that does not include an exposed structure 500 and is manufactured under the same conditions.

A state in which lateral deformation is suppressed refers to a state in which lateral deformation is not occurring or a state in which the degree of lateral deformation is small. A state in which the degree of lateral deformation is small refers to a state in which the amount of deformation of molded article 20 due to lateral deformation is small compared to a molded article 20 that does not include an exposed structure 500 and is manufactured under the same conditions.

A state in which vertical deformation is suppressed refers to a state in which no vertical deformation occurs or a state in which the degree of vertical deformation is small. A state in which the degree of vertical deformation is small refers to a state in which the amount of deformation of the molded product 20 due to vertical deformation is small compared to a molded product 20 that does not include an exposed structure 500 and is manufactured under the same conditions.

A state in which compound deformation is suppressed refers to a state in which compound deformation is not occurring or a state in which the degree of compound deformation is small. A state in which the degree of compound deformation is small refers to a state in which the amount of deformation of molded article 20 due to compound deformation is small compared to a molded article 20 that does not include an exposed structure 500 and is manufactured under the same conditions.

A state in which lateral deformation during compound deformation is suppressed refers to a state in which the degree of lateral deformation during compound deformation is small. A state in which the degree of lateral deformation during compound deformation is small refers to a state in which the amount of deformation of molded article 20 due to lateral deformation during compound deformation is small compared to a molded article 20 that does not include an exposed structure 500 and is manufactured under the same conditions.

A state in which vertical deformation during compound deformation is suppressed refers to a state in which the degree of vertical deformation during compound deformation is small. A state in which the degree of vertical deformation during compound deformation is small refers to a state in which the amount of deformation of molded product 20 due to vertical deformation during compound deformation is small compared to a molded product 20 that does not include an exposed structure 500 and is manufactured under the same conditions.

In one example of the molded product 20, the molded product 20 of the oral care product 10 includes a primary molded part P including a portion to be coated PC, a secondary molded part Q including a covering part Q40 that covers the portion to be coated PC, and an exposure structure 500 including one or more penetration parts P100 that penetrate the covering part Q40.

The through portion P100 is provided in the primary molding portion P and includes an exposed surface P101 exposed to the coating portion Q40. The coating target portion PC includes a first end portion PCA, a second end portion PCB, and an intermediate portion PCC in the axial direction.

The exposed structure 500 includes at least one of a first type penetration portion P100X1 located at least at the first end portion PCA, a second type penetration portion P100X2 located at least at the second end portion PCB, and a third type penetration portion P100X3 located at least at the middle portion PCC.

The above configuration provides the following advantages, for example: Because the coating target portion PC of the primary molded portion P is coated by the coating portion Q40 of the secondary molded portion Q, the area of the joint between the primary molded portion P and the secondary molded portion Q is increased. The position of the secondary molded portion Q relative to the primary molded portion P is stabilized. During the secondary molding process in which the secondary molded portion Q is molded, the exposed surface P101 of the through portion P100 comes into contact with the mold. Because the force that the primary molded portion P receives from the resin material corresponding to the secondary molded portion Q is transmitted to the mold, deformation during secondary molding is suppressed.

In one example of the molded product 20, the through portion P100 is configured to protrude from the outer surface PF of the coating target portion PC.

The above configuration provides the following advantages, for example: The exposed surface P101 of the through-hole P100 is more likely to come into proper contact with the mold.

In one example of the molded product 20, the exposure structure 500 includes multiple first-type penetration portions P100X1.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of the molded product 20, the exposure structure 500 includes multiple second-type penetration portions P100X2.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of the molded product 20, the primary molded part P includes a recess P60 that includes an arrangement space P61. The arrangement space P61 is configured so that a portion of the secondary molded part Q can be placed therein.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of the molded product 20, the primary molded portion P includes a protruding portion P80 that is covered by the covering portion Q40 of the secondary molded portion Q.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of the molded product 20, the material of the secondary molded portion Q includes a transparent resin or a translucent resin.

The above configuration provides the following advantages, for example: It is expected that the design of the molded product 20 will be improved.

In one example of the molded product 20, the material of the primary molded portion P includes polyacetal, polypropylene, or saturated polyester resin.

The above configuration provides the following advantages, for example: Improved abrasion resistance of the primary molded portion P and improved physical properties of the toothbrush 10A. One example of the physical properties of the toothbrush 10A is the tuft shedding resistance.

In one example of the molded product 20, the thermoplastic resin forming the secondary molded portion Q is a transparent or translucent resin.

The above configuration provides the following advantages, for example: It is expected that the design of the molded product 20 will be improved.

An example of the molded product 20 is the molded product 20 of a toothbrush 10A.

The above configuration provides the following benefits, for example: The toothbrush 10A provides the various benefits described above.

(Effect 2)
The configurations exemplified in the respective embodiments provide the following advantages, for example.

In one example of the molded article 20, the exposure structure 500 includes a plurality of first-type through-holes P100X1. The multiple first-type through-holes P100X1 are arranged at intervals in the axial direction.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of the molded article 20, the exposure structure 500 includes a plurality of second-type through-holes P100X2. The multiple second-type through-holes P100X2 are arranged at intervals in the axial direction.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of molded product 20, secondary molded portion Q includes a gate-corresponding surface corresponding to the gate-related portion of secondary molded portion Q, and an opposite surface located on the opposite side of the gate-corresponding surface. The exposed surface P101 includes at least a portion corresponding to the opposite surface.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of molded product 20, exposed surface P101 is arranged so as not to overlap the parting line of molded product 20.

The above configuration provides the following advantages, for example: It is expected that the design of the molded product 20 will be improved.

In one example of the molded product 20, the portion to be coated PC includes a constricted portion P20.

The above configuration provides the following advantages, for example: The position of the secondary molding portion Q relative to the primary molding portion P is more stable.

In one example of the molded product 20, the exposed surface P101 for at least one through-hole P100 includes a curved surface.

The above configuration provides the following advantages, for example: The force applied to the primary molding portion P during the secondary molding process is more easily distributed over a wide area. This contributes to, for example, improving the effectiveness of suppressing deformation during secondary molding.

In one example of the molded product 20, the exposed surface P101 of at least one through-hole P100 is located radially inward relative to the outer surface QF of the secondary molded portion Q.

The above configuration provides the following advantages, for example: The exposed surface P101 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

In one example of the molded article 20, the exposure structure 500 includes one or more through-holes P100. At least one through-hole P100 included in the exposure structure 500 is provided on the opposite side of the portion to be coated PC.

The above configuration provides the following advantages, for example: Vertical deformation, or vertical deformation during combined deformation, is suppressed.

In one example of the molded article 20, the exposure structure 500 includes one or more first-type penetration portions P100X1 provided on the surface opposite the coating target portion PC, and one or more second-type penetration portions P100X2 provided on the surface opposite the coating target portion PC.

The above configuration provides the following advantages, for example: It is more effective at suppressing deformation during secondary molding.

In one example of the molded product 20, at least one through-hole P100 and the covering portion Q40 located around it form a recessed structure 501.

The above configuration provides the following advantages, for example: The exposed surface P101 of the through-hole P100 is less noticeable. The design of the molded product 20 is expected to be improved. The hand is less likely to slip off the handle 110 when using the toothbrush 10A. The operability of the toothbrush 10A is improved.

In one example of the molded product 20, the exposure structure 500 includes a first group related to the penetration portion P100. The value obtained by multiplying the reference hand width by a predetermined coefficient is set as the specific distance, which is the distance between a specific position of the second end portion 110B of the main body 100 in the axial direction and a specific position of the first group.

The above configuration provides the following advantages, for example: The handle 110 is easier to grip. The toothbrush 10A is easier to use.

(Effect 3)
The configurations exemplified in the respective embodiments provide the following advantages, for example.

In one example of a molded product 20, the molded product 20 includes a primary molded portion P formed from a hard thermoplastic resin, a secondary molded portion Q formed from a hard thermoplastic resin, and a restricting structure R that restricts the movement of the secondary molded portion Q relative to the primary molded portion P. The secondary molded portion Q includes a covering portion Q40 that covers the outer surface PF of the primary molded portion P.

The above configuration provides the following advantages, for example: The restricting structure R restricts the movement of the secondary molded portion Q relative to the primary molded portion P, stabilizing the position of the secondary molded portion Q relative to the primary molded portion P. Because the secondary molded portion Q includes the covering portion Q40, the area of the joint between the primary molded portion P and the secondary molded portion Q is increased. This also stabilizes the position of the secondary molded portion Q relative to the primary molded portion P.

In one example of the molded product 20, the covering portion Q40 includes a first end portion Q40A, a second end portion Q40B, and an intermediate portion Q40C in the axial direction of the molded product 20. The first end portion Q40A, the second end portion Q40B, and the intermediate portion Q40C are joined to the outer surface PF of the primary molded part P.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is more effectively restricted.

In one example of the molded product 20, the covering portion Q40 is configured to cover at least a portion of the regulating structure R.

The above configuration provides the following advantages, for example: The user's hands are less likely to come into contact with the restricting structure R.

In one example of the molded product 20, the restricting structure R includes a diameter-changing portion R20 provided in the primary molded portion P. The diameter-changing portion R20 is configured so that the outer diameter changes in the axial direction of the molded product 20.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is appropriately restricted.

In one example of the molded product 20, the restricting structure R includes a surface undulation portion R30 provided in the primary molding portion P. The surface undulation portion R30 is configured to impart undulations to the outer surface PF of the primary molding portion P.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is appropriately restricted.

In one example of the molded product 20, the restricting structure R includes a protrusion R40 provided in the primary molding part P. The protrusion R40 is configured to protrude in a direction intersecting the central axis of the molded product 20.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is appropriately restricted.

In one example of the molded product 20, the restricting structure R includes a placement portion R50 provided in the primary molding portion P. The placement portion R50 includes a space in which a portion of the secondary molding portion Q is placed.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is appropriately restricted.

In one example of the molded product 20, the restricting structure R includes an undercut portion R60 provided in the primary molded portion P.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is appropriately restricted.

In one example of the molded product 20, the restricting structure R includes a circumferential portion RQ provided in the secondary molded portion Q. The circumferential portion RQ is configured to extend in the circumferential direction of the molded product 20.

The above configuration provides the following advantages, for example: The movement of the secondary molding portion Q relative to the primary molding portion P is appropriately restricted.

In one example of the molded product 20, the molded product 20 includes a primary molded portion P, a secondary molded portion Q provided in the primary molded portion P, and a decorative portion 400 provided in the primary molded portion P. The secondary molded portion Q is made of a transparent or translucent resin and includes a decorative exterior portion Q50 that covers the decorative portion 400.

The above configuration provides the following advantages, for example: Because the decorative portion 400 is provided on the outer surface PF of the primary molded portion P, the design of the oral care product 10 is expected to be improved. Because the decorative portion 400 is covered by the decorative exterior portion Q50, the decorative portion 400 is visible through the decorative exterior portion Q50. This also contributes to the expected improvement in the design of the oral care product 10.

In one example of the molded product 20, the decorative portion 400 includes a surface relief portion 410 that provides irregularities to the outer surface PF of the primary molded portion P.

The above configuration provides the following advantages, for example: Because incident light is reflected in a variety of directions, the design of the oral care product 10 is expected to be improved. Because the decorative part 400, including the surface undulations 410, is covered by the decorative exterior part Q50, the operability of the oral care product 10 is improved.

In one example of molded article 20, the surface relief 410 includes a plurality of geometrically shaped surfaces 420.

The above configuration provides the following advantages, for example: The appearance of the surface undulations 410 is neat, and it is expected that the design of the oral care product 10 will be improved.

In one example of molded article 20, geometric surface 420 is a polygonal surface.

The above configuration provides the following advantages, for example: The appearance of the surface undulations 410 is neat, and it is expected that the design of the oral care product 10 will be improved.

In one example of the molded article 20, the surface relief 410 includes a chevron portion 430. The chevron portion 430 is composed of at least two geometrically shaped surfaces 420.

The above configuration provides the following advantages, for example: The three-dimensional effect of the surface undulations 410 is emphasized, which is expected to improve the design of the oral care product 10.

In one example of the molded article 20, the surface relief 410 includes a valley 440. The valley 440 is made up of at least two geometrically shaped surfaces 420.

The above configuration provides the following advantages, for example: The three-dimensional effect of the surface undulations 410 is emphasized, which is expected to improve the design of the oral care product 10.

In one example of the molded article 20, the multiple geometric surfaces 420 are arranged along a reference line. The reference line is a spiral.

The above configuration provides the following advantages, for example: The arrangement of the multiple geometrically shaped surfaces 420 is orderly, which is expected to improve the design of the oral care product 10.

In one example of the molded product 20, the molded product 20 includes a handle 110. The primary molded portion P includes a primary handle component P10 that constitutes the handle 110. The secondary molded portion Q includes a secondary handle component Q10 that constitutes the handle 110. The decorative portion 400 is provided on the outer surface PF of the primary handle component P10. The secondary handle component Q10 includes a decorative exterior portion Q50.

The above configuration provides the following advantages, for example: Because the decorative portion 400 is provided on the handle 110, which is one of the main parts of the molded product 20, it is expected that the design of the oral care product 10 will be improved.

In one example of the molded product 20, the molded product 20 is used in a toothbrush 10A.

The above configuration can achieve the following effects, for example: It is expected that the design of the toothbrush 10A will be improved.

In one example of the oral care product 10, the oral care product 10 includes a molded article 20.

The above configuration can achieve the following effects, for example: It is expected that the design of the oral care product 10 will be improved.

In one example of the molded article 20, the molded article 20 has the following configuration. The molded article 20 includes a main body 100 and a pressable structure 200 configured to be pressed by an ejector pin. The pressable structure 200 includes a protrusion 220 that protrudes relative to the main body 100.

The above configuration provides the following advantages, for example: The protruding portion 220 can be pushed by the ejector pin during the extrusion process. This reduces the number of pressed portions in the molded product 20. When the number of pressed portions in the molded product 20 is reduced, the following advantages can be obtained, for example: The design of the oral care product 10 can be expected to be improved. Foreign matter is less likely to accumulate on the surface of the main body 100.

Examples of a state in which the pressed portion of the molded article 20 has been reduced include a state in which there is no pressed portion in the molded article 20, and a state in which the area of the pressed portion of the main body 100 of the molded article 20 is smaller than that of a molded article 20 that does not have a protrusion 220.

In one example of the molded product 20, the protrusion 220 is configured as a removal portion 300 that is intended to be removed.

The above configuration provides the following advantages, for example: It is possible to manufacture a molded product 20 that does not include a pressed portion of the protrusion 220.

In one example of the molded product 20, the protrusion 220 connects to the end of the main body 100.

The above configuration provides the following advantages, for example: The influence of the protrusion 220 on the design of the shape of the main body 100 is reduced.

In one example of the molded product 20, the protrusion 220 is thinner than the main body 100.

The above configuration provides the following advantages, for example: The amount of material used to mold the protrusion 220 can be reduced.

In one example of the molded product 20, the protrusion 220 is shorter than the main body 100.

The above configuration provides the following advantages, for example: The amount of material used to mold the protrusion 220 can be reduced.

In one example of molded article 20, molded article 20 has the following configuration. Molded article 20 includes a primary molded portion P and a secondary molded portion Q provided on the outer surface PF of primary molded portion P. Primary molded portion P includes a primary main body component PA that constitutes main body 100, and a protrusion 220. Secondary molded portion Q includes a secondary main body component QA that constitutes main body 100.

The above configuration provides the following advantages, for example: The number of pressed parts in the secondary main body component QA can be reduced.

In one example of toothbrush 10A, toothbrush 10A includes a molded article 20.

The above configuration can achieve the following effects, for example: It is expected that the design of the toothbrush 10A will be improved.

In one example of toothbrush 10A, toothbrush 10A has the following configuration. Toothbrush 10A includes a molded article 20 in which protruding portion 220 is configured as portion to be removed 300. Toothbrush 10A is in a state in which protruding portion 220 has been removed.

The above configuration can achieve the following effects, for example: It is expected that the design of the toothbrush 10A will be improved.

One example of a method for manufacturing the molded product 20 includes the following steps: a molding step in which the molded product 20 is molded in a mold, and an extrusion step in which the molded product 20 is pushed by an ejector pin after the molding step. In the extrusion step, the ejector pin pushes the protrusion 220.

The above configuration provides the following advantages, for example: The number of pressure-receiving parts on the main body 100 can be reduced.

In one example of a method for manufacturing molded product 20, the manufacturing method includes the following steps. The molding process includes a primary molding process for molding primary molded portion P, and a secondary molding process for molding secondary molded portion Q. The extrusion process includes a primary extrusion process for pushing protruding portion 220 of primary molded portion P after the primary molding process is performed, and a secondary extrusion process for pushing protruding portion 220 of secondary molded portion Q after the secondary molding process is performed.

The above configuration provides the following advantages, for example: The number of pressed portions in the secondary molded portion Q can be reduced.

In one example of a method for manufacturing the molded product 20, the manufacturing method further includes a removal step for removing the protrusion 220 after the extrusion step is performed.

The above configuration provides the following advantages, for example: The number of pressed parts in the molded product 20 can be reduced.

In one example of the molded product 20, the molded product 20 includes the following configuration: The secondary molded portion Q includes a secondary handle component Q10. The secondary handle component Q10 covers the outer surface PF of the primary handle component P10. A transparent or translucent resin is used as the material for the secondary molded portion Q.

The above configuration provides the following advantages, for example: The primary handle component P10 can be seen from the outside of the molded product 20. This is expected to improve the design of the oral care product 10.

In one example of the molded product 20, the primary handle component P10 of the primary molded part P includes one or more protrusions P13.

The above configuration provides the following advantages, for example: The protrusion P13 restricts axial movement of the secondary molded portion Q relative to the primary molded portion P. The position of the secondary molded portion Q relative to the primary molded portion P is stabilized.

In one example of the molded product 20, the primary handle-forming portion P10 of the primary molded portion P includes a constricted portion P20.

The above configuration provides the following advantages, for example: It is expected that the design of the oral care product 10 will be improved. Axial movement of the secondary molded portion Q relative to the primary molded portion P is restricted by the constricted portion P20 of the secondary molded portion Q. The position of the secondary molded portion Q relative to the primary molded portion P is stabilized.

In one example of the molded product 20, the secondary handle component Q10 of the secondary molded portion Q includes a constricted portion Q20.

The above configuration can provide the following advantages, for example: It is expected that the design of the oral care product 10 will be improved. The handle 110 will be easier to grip.

In one example of molded article 20, molded article 20 has the following configuration: A first end Q20A of constricted portion Q20 corresponds to a first end P20A of constricted portion P20. A second end Q20B of constricted portion Q20 corresponds to a second end P20B of constricted portion P20. A middle portion Q20C of constricted portion Q20 corresponds to a middle portion P20C of constricted portion P20.

The above configuration can achieve the following effects, for example: It is expected that the design of the oral care product 10 will be improved.

In one example of the molded article 20, the molded article 20 includes a decorative portion 400.

The above configuration can achieve the following effects, for example: It is expected that the design of the oral care product 10 will be improved.

In one example of a method for manufacturing the molded product 20, the secondary cavity is filled with resin material while the primary molding part P is fixed.

The above configuration provides the following advantages, for example: As the resin material fills the secondary cavity, the primary handle component P10 of the primary molded part P is subjected to force from the resin material. Because the primary molded part P is fixed, bending of the primary handle component P10 is suppressed.

Second Embodiment
The molded product 20 of this embodiment is configured based on the first embodiment. The molded product 20 of this embodiment includes components common to the first embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the first embodiment. Some or all of the description of the components common to the molded product 20 of the first embodiment will be omitted.

The exposed structure 500 of this embodiment includes one or more first-type through portions P100X1. The configuration of the first-type through portions P100X1, including the shape, number, and arrangement of the first-type through portions P100X1, can be selected arbitrarily.

The volume of each individual first-type penetrating portion P100X1 is referred to as the "first-type individual volume." The volume of all first-type penetrating portions P100X1 is referred to as the "first-type total volume." The first-type total volume is the sum of the first-type individual volumes of all first-type penetrating portions P100X1 included in the exposed structure 500. When the number of first-type penetrating portions P100X1 included in the exposed structure 500 is 1, the first-type total volume is equal to the first-type individual volume.

In one example, the first type total volume is included in a predetermined range for the first type total volume. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit total volume. In the second example, the predetermined range is equal to or less than the upper limit total volume. In the third example, the predetermined range is equal to or greater than the lower limit total volume and equal to or less than the upper limit total volume.

The lower limit total volume is selected from, for example, 1 mm ³ , 5 mm ³ , or 10 mm ³ . The upper limit total volume is selected from, for example, 50 mm ³ , 75 mm ³ , or 100 mm ³ . Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 1 mm ³ and 50 mm ³ . In Example 3B, the predetermined range is between 1 mm ³ and 75 mm ³ . In Example 3C, the predetermined range is between 1 mm ³ and 100 mm ³ .

In Example 3D, the predetermined range is between 5 mm ³ and 50 mm ³ . In Example 3E, the predetermined range is between 5 mm ³ and 75 mm ³ . In Example 3F, the predetermined range is between 5 mm ³ and 100 mm ³ .

In Example 3G, the predetermined range is between 10 mm ³ and 50 mm ³ . In Example 3H, the predetermined range is between 10 mm ³ and 75 mm ³ . In Example 3I, the predetermined range is between 10 mm ³ and 100 mm ³ .

(effect)
The configuration exemplified in this embodiment provides the following effects, for example.

In one example of molded product 20, the first type total volume is equal to or greater than the lower limit total volume.

The above configuration provides the following advantages, for example: The first type through portion P100X1 is less likely to deform or break during the secondary molding process. The effect of suppressing deformation during secondary molding is improved. The effect of suppressing longitudinal deformation during longitudinal deformation or combined deformation is improved.

In one example of molded product 20, the first type total volume is less than or equal to the upper limit total volume.

The above configuration provides the following advantages, for example: The first-type through-hole P100X1 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

In one example of the molded article 20, the first type total volume is in the range of 1 mm ³ or more.

The above configuration provides the following advantages, for example: The first type through portion P100X1 is less likely to deform or break during the secondary molding process. The effect of suppressing deformation during secondary molding is improved. The effect of suppressing longitudinal deformation during longitudinal deformation or combined deformation is improved.

In one example of the molded article 20, the first type total volume is in the range of 100 mm3 or ^less .

The above configuration provides the following advantages, for example: The first-type through-hole P100X1 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

(Third embodiment)
The molded product 20 of this embodiment is configured based on the first or second embodiment. The molded product 20 of this embodiment includes components common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the components common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The exposed structure 500 of this embodiment includes one or more second-type through portions P100X2. The configuration of the second-type through portions P100X2, including the shape, number, and arrangement of the second-type through portions P100X2, can be selected arbitrarily.

The volume of each type 2 penetrating portion P100X2 is referred to as the "type 2 individual volume." The volume of all type 2 penetrating portions P100X2 is referred to as the "type 2 total volume." The type 2 total volume is the sum of the type 2 individual volumes of all type 2 penetrating portions P100X2 included in the exposed structure 500. When the number of type 2 penetrating portions P100X2 included in the exposed structure 500 is 1, the type 2 total volume is equal to the type 2 individual volume.

In one example, the second type total volume is included in a predetermined range for the second type total volume. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit total volume. In the second example, the predetermined range is equal to or less than the upper limit total volume. In the third example, the predetermined range is equal to or greater than the lower limit total volume and equal to or less than the upper limit total volume.

The lower limit total volume is selected from, for example, 1 mm ³ , 5 mm ³ , or 10 mm ³ . The upper limit total volume is selected from, for example, 50 mm ³ , 75 mm ³ , or 100 mm ³ . Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 1 mm ³ and 50 mm ³ . In Example 3B, the predetermined range is between 1 mm ³ and 75 mm ³ . In Example 3C, the predetermined range is between 1 mm ³ and 100 mm ³ .

In Example 3D, the predetermined range is between 5 mm ³ and 50 mm ³ . In Example 3E, the predetermined range is between 5 mm ³ and 75 mm ³ . In Example 3F, the predetermined range is between 5 mm ³ and 100 mm ³ .

In Example 3G, the predetermined range is between 10 mm ³ and 50 mm ³ . In Example 3H, the predetermined range is between 10 mm ³ and 75 mm ³ . In Example 3I, the predetermined range is between 10 mm ³ and 100 mm ³ .

(effect)
The configuration exemplified in this embodiment provides the following effects, for example.

In one example of molded product 20, the second type total volume is equal to or greater than the lower limit total volume.

The above configuration provides the following advantages, for example: The second-type through-hole P100X2 is less likely to deform or break during the secondary molding process. It is more effective at suppressing deformation during secondary molding. It is more effective at suppressing longitudinal deformation during longitudinal deformation or combined deformation.

In one example of molded product 20, the second type total volume is less than or equal to the upper limit total volume.

The above configuration provides the following advantages, for example: The second-type through-hole P100X2 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

In one example of the molded article 20, the second type total volume is in the range of 1 mm3 or ^more .

The above configuration provides the following advantages, for example: The second-type through-hole P100X2 is less likely to deform or break during the secondary molding process. It is more effective at suppressing deformation during secondary molding. It is more effective at suppressing longitudinal deformation during longitudinal deformation or combined deformation.

In one example of the molded article 20, the second type total volume is in the range of 100 mm3 or ^less .

The above configuration provides the following advantages, for example: The second-type through-hole P100X2 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

(Fourth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to third embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following explanation will show the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the explanations regarding the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The exposed structure 500 of this embodiment includes one or more third-type through portions P100X3. The configuration of the third-type through portions P100X3, including the shape, number, and arrangement of the third-type through portions P100X3, can be selected arbitrarily.

The volume of each type 3 penetrating portion P100X3 is referred to as the "type 3 individual volume." The volume of all type 3 penetrating portions P100X3 is referred to as the "type 3 total volume." The type 3 total volume is the sum of the type 3 individual volumes of all type 3 penetrating portions P100X3 included in the exposed structure 500. When the number of type 3 penetrating portions P100X3 included in the exposed structure 500 is 1, the type 3 total volume is equal to the type 3 individual volume.

In one example, the third type total volume is included in a predetermined range for the third type total volume. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit total volume. In the second example, the predetermined range is equal to or less than the upper limit total volume. In the third example, the predetermined range is equal to or greater than the lower limit total volume and equal to or less than the upper limit total volume.

The lower limit total volume is selected from, for example, 1 mm ³ , 5 mm ³ , or 10 mm ³ . The upper limit total volume is selected from, for example, 50 mm ³ , 75 mm ³ , or 100 mm ³ . Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 1 mm ³ and 50 mm ³ . In Example 3B, the predetermined range is between 1 mm ³ and 75 mm ³ . In Example 3C, the predetermined range is between 1 mm ³ and 100 mm ³ .

In Example 3D, the predetermined range is between 5 mm ³ and 50 mm ³ . In Example 3E, the predetermined range is between 5 mm ³ and 75 mm ³ . In Example 3F, the predetermined range is between 5 mm ³ and 100 mm ³ .

In Example 3G, the predetermined range is between 10 mm ³ and 50 mm ³ . In Example 3H, the predetermined range is between 10 mm ³ and 75 mm ³ . In Example 3I, the predetermined range is between 10 mm ³ and 100 mm ³ .

(effect)
The configuration exemplified in this embodiment provides the following effects, for example.

In one example of molded product 20, the third type total volume is equal to or greater than the lower limit total volume.

The above configuration provides the following advantages, for example: The third type through-hole P100X3 is less likely to deform or break during the secondary molding process. The effect of suppressing deformation during secondary molding is improved. The effect of suppressing longitudinal deformation during longitudinal deformation or combined deformation is improved.

In one example of molded product 20, the third-type total volume is less than or equal to the upper limit total volume.

The above configuration provides the following advantages, for example: The third-type through-hole P100X3 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

In one example of the molded article 20, the third type total volume is in the range of 1 mm ³ or more.

The above configuration provides the following advantages, for example: The third type through-hole P100X3 is less likely to deform or break during the secondary molding process. The effect of suppressing deformation during secondary molding is improved. The effect of suppressing longitudinal deformation during longitudinal deformation or combined deformation is improved.

In one example of the molded article 20, the third type total volume is in the range of 100 mm3 ^or less.

The above configuration provides the following advantages, for example: The third-type through-hole P100X3 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

Fifth Embodiment
The molded product 20 of this embodiment is configured based on any one of the first to fourth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following explanation will show the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the explanations regarding the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The exposed structure 500 of this embodiment includes one or more first-type through portions P100X1 and one or more second-type through portions P100X2. The configuration of the first-type through portions P100X1, including the shape, number, and arrangement of the first-type through portions P100X1, can be selected arbitrarily. The configuration of the second-type through portions P100X2, including the shape, number, and arrangement of the second-type through portions P100X2, can be selected arbitrarily.

The sum of the first type total volume and the second type total volume is referred to as the "multiple types total volume." In one example, the multiple types total volume falls within a predetermined range for the multiple types total volume. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit total volume. In the second example, the predetermined range is equal to or less than the upper limit total volume. In the third example, the predetermined range is equal to or greater than the lower limit total volume and equal to or less than the upper limit total volume.

The lower limit total volume is selected from, for example, 2 mm ³ , 10 mm ³ , or 20 mm ³ . The upper limit total volume is selected from, for example, 100 mm ³ , 150 mm ³ , or 200 mm ³ . Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 2 mm ³ and 100 mm ³ . In Example 3B, the predetermined range is between 2 mm ³ and 150 mm ³ . In Example 3C, the predetermined range is between 2 mm ³ and 200 mm ³ .

In Example 3D, the predetermined range is between 10 mm ³ and 100 mm ³ . In Example 3E, the predetermined range is between 10 mm ³ and 150 mm ³ . In Example 3F, the predetermined range is between 10 mm ³ and 200 mm ³ .

In Example 3G, the predetermined range is between 20 mm ³ and 100 mm ³ . In Example 3H, the predetermined range is between 20 mm ³ and 150 mm ³ . In Example 3I, the predetermined range is between 20 mm ³ and 200 mm ³ .

(effect)
The configuration exemplified in this embodiment provides the following effects, for example.

In one example of molded product 20, the total volume of the multiple types is equal to or greater than the lower limit total volume.

The above configuration provides the following advantages, for example: Deformation or damage to at least one of the first type through portion P100X1 and the second type through portion P100X2 is less likely to occur during the secondary molding process. The effect of suppressing deformation during secondary molding is enhanced. The effect of suppressing longitudinal deformation during longitudinal deformation or combined deformation is enhanced.

In one example of molded product 20, the total volume of the multiple types is less than or equal to the upper limit total volume.

The above configuration provides the following advantages, for example: At least one of the first type through portion P100X1 and the second type through portion P100X2 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

In one example of the molded article 20, the total volume of the various components is in the range of 2 ^mm3 or more.

The above configuration provides the following advantages, for example: Deformation or damage to at least one of the first type through portion P100X1 and the second type through portion P100X2 is less likely to occur during the secondary molding process. The effect of suppressing deformation during secondary molding is enhanced. The effect of suppressing longitudinal deformation during longitudinal deformation or combined deformation is enhanced.

In one example of the molded article 20, the total volume of the various types falls within the range of 200 ^mm3 or less.

The above configuration provides the following advantages, for example: At least one of the first type through portion P100X1 and the second type through portion P100X2 becomes less noticeable. This contributes to improving the design of the molded product 20, for example.

Sixth Embodiment
The molded product 20 of this embodiment is configured based on the first embodiment. The molded product 20 of this embodiment includes components common to the first embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the first embodiment. Some or all of the description of the components common to the molded product 20 of the first embodiment will be omitted.

Please refer to Figure 37. Figure 37 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molding part P includes a recess P60. The configuration of the recess P60 can be selected arbitrarily. The configuration of the recess P60 is not limited to the configuration shown in the example. The recess P60 is configured to be recessed relative to the outer surface PF of the primary molding part P.

The recess P60 is provided, for example, in the primary body component PA. The recess P60 includes an arrangement space P61, an arrangement surface P62, and an opening P63. The arrangement space P61 is configured so that part of the secondary molded part Q can be arranged therein. The arrangement surface P62 defines the arrangement space P61. The opening P63 opens to the outer surface PF of the primary molded part P.

The following are examples of the position of the opening P63 in the circumferential direction of the primary molding portion P. In the first example, the opening P63 opens to the front surface of the primary molding portion P. In the second example, the opening P63 opens to the back surface of the primary molding portion P. In the third example, the opening P63 opens to the first side surface of the primary molding portion P. In the fourth example, the opening P63 opens to the second side surface of the primary molding portion P.

The following are examples of the position of the recess P60 in the axial direction of the primary molded part P. In the first example, the recess P60 is provided in the primary handle component P10. In the second example, the recess P60 is provided in the neck 120. In the third example, the recess P60 is provided in the head 130.

In a fourth example, the recess P60 is provided in the primary handle component P10 and the neck 120. In a fifth example, the recess P60 is provided in the neck 120 and the head 130. In a sixth example, the recess P60 is provided in the primary handle component P10, the neck 120, and the head 130.

The following are examples of the configuration of the recess P60 related to release from the primary mold. In a first example, the recess P60 is configured to be a non-undercut relative to the primary mold. The side of the positioning surface P62 is, for example, parallel to the second reference surface or the third reference surface. In a second example, the recess P60 is configured to be an undercut relative to the primary mold. The positioning surface P62 includes, for example, a side that is inclined relative to the second reference surface or the third reference surface.

In the secondary molding process, the resin material corresponding to the secondary molded portion Q flows into the placement space P61 of the recess P60. The placement space P61 functions as a flow path for the resin material corresponding to the secondary molded portion Q. The flow of the resin material corresponding to the secondary molded portion Q differs depending on whether the primary molded portion P includes a recess P60 or does not include a recess P60.

The secondary molded part Q includes an internal protrusion Q60. The internal protrusion Q60 is disposed in the recess P60. The internal protrusion Q60 is configured to fill the arrangement space P61 of the recess P60. The outer surface QF of the internal protrusion Q60 is joined to the arrangement surface P62 of the recess P60.

The restricting structure R includes a positioning portion R50. The configuration of the positioning portion R50 can be selected arbitrarily. The configuration of the positioning portion R50 is not limited to the configuration shown in the example. The positioning portion R50 is configured to restrict the relative movement and relative rotation of the secondary molding portion Q.

The placement portion R50 is provided in the primary molding portion P. The placement portion R50 is configured to be recessed relative to the outer surface PF of the primary molding portion P. The recess P60 of the primary molding portion P corresponds to the placement portion R50 of the restriction structure R.

Examples A and B are examples of configurations in which the regulating structure R includes multiple placement portions R50. In Example A, the multiple placement portions R50 are regularly arranged. In Example B, the multiple placement portions R50 are irregularly arranged. Details of Example A include Examples A1 to A11, for example.

In Example A1, the regulating structure R includes a group of multiple placement portions R50 aligned in the axial direction. In Example A2, the regulating structure R includes multiple groups of Example A1.

In Example A3, the regulating structure R includes a group of multiple placement portions R50 aligned in the width direction. In Example A4, the regulating structure R includes multiple groups of Example A3.

In example A5, the regulating structure R includes a group of multiple placement portions R50 aligned in the thickness direction. In example A6, the regulating structure R includes multiple groups of example A5.

In Example A7, the regulating structure R includes a group of multiple arrangement portions R50 aligned in the circumferential direction. In Example A8, the regulating structure R includes multiple groups of Example A7.

In Example A9, the regulating structure R includes a group of multiple placement portions R50 aligned in a different direction than in Examples A1 to A8. In Example A10, the regulating structure R includes multiple groups of Example A9.

In Example A11, the regulatory structure R includes at least two of the configurations in Examples A1 to A10. In Example A12, the regulatory structure R includes at least one of the configurations in Examples A1 to A11 and the configuration in Example B.

In one example of this embodiment, the restricting structure R includes an undercut portion R60. The configuration of the undercut portion R60 can be selected as desired. The configuration of the undercut portion R60 is not limited to the configuration shown in the example. The undercut portion R60 is configured to restrict the relative movement and relative rotation of the secondary molded portion Q.

The undercut portion R60 is provided in the primary molded portion P. The recess P60 in the primary molded portion P corresponds to the undercut portion R60 in the restricting structure R. Examples of the configuration of the undercut portion R60 include Examples 1 to 7.

In a first example, the undercut portion R60 is configured to restrict a first type of relative movement. In a second example, the undercut portion R60 is configured to restrict a second type of relative movement. In a third example, the undercut portion R60 is configured to restrict a third type of relative movement. In a fourth example, the undercut portion R60 is configured to include at least two of the configurations of the first to third examples.

In the fifth example, the undercut portion R60 is configured to restrict a first type of relative rotation. In the sixth example, the undercut portion R60 is configured to restrict a second type of relative rotation. In the seventh example, the undercut portion R60 is configured to include the configurations of both the fifth and sixth examples.

In an example in which the recess P60 is configured to be an undercut, the restriction structure R includes a placement portion R50 and an undercut portion R60. The recess P60 of the primary molding portion P corresponds to the placement portion R50 and undercut portion R60 of the restriction structure R. In an embodiment in which the restriction structure R includes an undercut portion R60, a slide mold, for example, is used to mold the molded product 20.

When the primary molded portion P includes a through-hole P100 and a recess P60, the following effects can be obtained, for example: It is more effective at suppressing deformation during secondary molding. It is believed that the provision of the recess P60 has an effect of changing the flow of resin material corresponding to the secondary molded portion Q.

Seventh Embodiment
The molded product 20 of this embodiment is configured based on the first or sixth embodiment. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

Please refer to Figure 38. Figure 38 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molding part P includes a through-hole arrangement part P70. The configuration of the through-hole arrangement part P70 can be selected arbitrarily. The configuration of the through-hole arrangement part P70 is not limited to the configuration shown in the example. The through-hole arrangement part P70 is configured to penetrate the primary molding part P.

The through-hole arrangement portion P70 is provided, for example, in the primary main body component PA. The through-hole arrangement portion P70 includes a through-hole space P71, an inner peripheral surface P72, and two openings P73. The through-hole space P71 is configured so that a portion of the secondary molded portion Q can be placed therein. The inner peripheral surface P72 defines the through-hole space P71. The openings P73 open to the outer surface PF of the primary molded portion P. One opening P73 is provided at one end of the through-hole arrangement portion P70. The other opening P73 is provided at the other end of the through-hole arrangement portion P70.

The following are examples of the position of the openings P73 in the circumferential direction of the primary molding portion P. In the first example, one opening P73 opens to the front surface of the primary molding portion P. The other opening P73 opens to the back surface of the primary molding portion P. In the second example, one opening P73 opens to the first side surface of the primary molding portion P. The other opening P73 opens to the second side surface of the primary molding portion P.

The following are examples of the position of the through-hole arrangement portion P70 in the axial direction of the primary molding portion P. In the first example, the through-hole arrangement portion P70 is provided in the primary handle component P10. In the second example, the through-hole arrangement portion P70 is provided in the neck 120. In the third example, the through-hole arrangement portion P70 is provided in the head 130.

In a fourth example, the through-hole arrangement portion P70 is provided in the primary handle component P10 and the neck 120. In a fifth example, the through-hole arrangement portion P70 is provided in the neck 120 and the head 130. In a sixth example, the through-hole arrangement portion P70 is provided in the primary handle component P10, the neck 120, and the head 130.

The following are examples of the configuration of the through-hole arrangement portion P70 related to release from the primary mold. In a first example, the through-hole arrangement portion P70 is configured to be a non-undercut relative to the primary mold. The central axis of the through-hole arrangement portion P70 is, for example, parallel to the thickness direction. In a second example, the through-hole arrangement portion P70 is configured to be an undercut relative to the primary mold. The central axis of the through-hole arrangement portion P70 is, for example, inclined relative to the thickness direction.

In the secondary molding process, the resin material corresponding to the secondary molded portion Q passes through the through space P71 of the through-hole arrangement portion P70. The through space P71 functions as a flow path for the resin material corresponding to the secondary molded portion Q. The flow of the resin material corresponding to the secondary molded portion Q differs between when the primary molded portion P includes the through-hole arrangement portion P70 and when the primary molded portion P does not include the through-hole arrangement portion P70.

The secondary molded portion Q includes a penetrating protrusion Q70. The penetrating protrusion Q70 is arranged in the penetrating arrangement portion P70. The penetrating protrusion Q70 is configured to fill the through space P71 of the penetrating arrangement portion P70. The outer surface QF of the penetrating protrusion Q70 is joined to the inner surface P72 of the penetrating arrangement portion P70.

The restricting structure R includes a placement portion R50. The through placement portion P70 of the primary molding portion P corresponds to the placement portion R50 of the restricting structure R. In one example, the through placement portion P70 corresponds to the undercut portion R60 of the restricting structure R.

Eighth Embodiment
The molded product 20 of this embodiment is configured based on the sixth and seventh embodiments. The molded product 20 of this embodiment includes configurations common to the underlying embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiments. Some or all of the description of the configurations common to the molded product 20 of the underlying embodiments of the molded product 20 of this embodiment will be omitted.

Please refer to Figure 39. Figure 39 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molding portion P includes a plurality of recesses P60. The configuration of the plurality of recesses P60 can be selected arbitrarily. The configuration of the plurality of recesses P60 is not limited to the configuration illustrated. The plurality of recesses P60 includes, for example, a first recess P601 and a second recess P602. The first recess P601 is located radially opposite the second recess P602.

The first recess P601 is provided, for example, in the primary body forming part PA. The first recess P601 includes an arrangement space P61, an arrangement surface P62, and an opening P63. The arrangement space P61 is configured to be recessed relative to the outer surface PF of the primary molding part P. The arrangement surface P62 defines the arrangement space P61. The opening P63 opens to the outer surface PF of the primary molding part P.

The following are examples of the position of the first recess P601 in the circumferential direction of the primary molding portion P. In a first example, the first recess P601 is provided on the front surface of the primary molding portion P. In a second example, the first recess P601 is provided on the back surface of the primary molding portion P. In a third example, the first recess P601 is provided on the first side surface of the primary molding portion P. In a fourth example, the first recess P601 is provided on the second side surface of the primary molding portion P.

The following are examples of the position of the first recess P601 in the axial direction of the primary molding part P. In a first example, the first recess P601 is provided in the primary handle component P10. In a second example, the first recess P601 is provided in the neck 120. In a third example, the first recess P601 is provided in the head 130.

In a fourth example, the first recess P601 is provided in the primary handle component P10 and the neck 120. In a fifth example, the first recess P601 is provided in the neck 120 and the head 130. In a sixth example, the first recess P601 is provided in the primary handle component P10, the neck 120, and the head 130.

The second recess P602 is provided, for example, in the primary body forming part PA. The second recess P602 includes an arrangement space P61, an arrangement surface P62, and an opening P63. The arrangement space P61 is configured to be recessed relative to the outer surface PF of the primary molding part P. The arrangement surface P62 defines the arrangement space P61. The opening P63 opens to the outer surface PF of the primary molding part P.

The following are examples of the position of the second recess P602 in the circumferential direction of the primary molding portion P. In a first example, the second recess P602 is provided on the back surface of the primary molding portion P. In a second example, the second recess P602 is provided on the front surface of the primary molding portion P. In a third example, the second recess P602 is provided on the second side surface of the primary molding portion P. In a fourth example, the second recess P602 is provided on the first side surface of the primary molding portion P.

The following are examples of the position of the second recess P602 in the axial direction of the primary molding part P. In a first example, the second recess P602 is provided in the primary handle component P10. In a second example, the second recess P602 is provided in the neck 120. In a third example, the second recess P602 is provided in the head 130.

In a fourth example, the second recess P602 is provided in the primary handle component P10 and the neck 120. In a fifth example, the second recess P602 is provided in the neck 120 and the head 130. In a sixth example, the second recess P602 is provided in the primary handle component P10, the neck 120, and the head 130.

The following illustrates the relationship between the length of the first recess P601 and the length of the second recess P602 in the axial direction. In the first example, the length of the first recess P601 is longer than the length of the second recess P602. In the second example, the length of the first recess P601 is shorter than the length of the second recess P602. In the third example, the length of the first recess P601 is equal to the length of the second recess P602.

The following illustrates the relationship between the length of the first recess P601 and the length of the second recess P602 in the circumferential direction. In the first example, the length of the first recess P601 is longer than the length of the second recess P602. In the second example, the length of the first recess P601 is shorter than the length of the second recess P602. In the third example, the length of the first recess P601 is equal to the length of the second recess P602.

The primary molding part P includes a through-hole arrangement part P70. The through-hole arrangement part P70 connects the first recess P601 and the second recess P602. The through-hole arrangement part P70 is provided inside the primary molding part P. The through-hole arrangement part P70 penetrates the primary molding part P. The through-hole arrangement part P70 opens to the arrangement surface P62 of the first recess P601 and the arrangement surface P62 of the second recess P602.

The secondary molded portion Q includes multiple internal protrusions Q60. The configuration of the multiple internal protrusions Q60 can be selected arbitrarily. The configuration of the multiple internal protrusions Q60 is not limited to the configuration illustrated. The multiple internal protrusions Q60 include, for example, a first internal protrusion Q60A and a second internal protrusion Q60B.

The first internal protrusion Q60A is arranged in the first recess P601. The first internal protrusion Q60A is configured to fill the arrangement space P61 of the first recess P601. The first internal protrusion Q60A is joined to the arrangement surface P62 of the first recess P601.

The second internal protrusion Q60B is arranged in the second recess P602. The second internal protrusion Q60B is configured to fill the arrangement space P61 of the second recess P602. The second internal protrusion Q60B is joined to the bottom surface of the arrangement surface P62 of the second recess P602.

The secondary molded portion Q includes a through-hole protrusion Q70. The through-hole protrusion Q70 connects the first internal protrusion Q60A and the second internal protrusion Q60B.

The restricting structure R includes a placement portion R50. The recess P60 of the primary molding portion P corresponds to the placement portion R50 of the restricting structure R.

Ninth embodiment
The molded product 20 of this embodiment is configured based on any one of the first to eighth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

Please refer to Figure 40. Figure 40 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molded portion P includes one or more protrusions P80. The configuration of the protrusions P80 can be selected arbitrarily. The configuration of the protrusions P80 is not limited to the configuration shown in the example. The protrusions P80 protrude radially from the outer surface PF of the primary molded portion P.

The following are examples of the position of the protrusion P80 in the circumferential direction of the primary molding portion P. In the first example, the protrusion P80 is provided on the front surface of the primary molding portion P. In the second example, the protrusion P80 is provided on the back surface of the primary molding portion P. In the third example, the protrusion P80 is provided on the first side surface of the primary molding portion P. In the fourth example, the protrusion P80 is provided on the second side surface of the primary molding portion P.

The following are examples of the position of the protrusion P80 in the axial direction of the primary molding part P. In the first example, the protrusion P80 is provided on the primary handle component P10. In the second example, the protrusion P80 is provided on the neck 120. In the third example, the protrusion P80 is provided on the head 130.

In a fourth example, the protrusion P80 is provided on the primary handle component P10 and the neck 120. In a fifth example, the protrusion P80 is provided on the neck 120 and the head 130. In a sixth example, the protrusion P80 is provided on the primary handle component P10, the neck 120, and the head 130.

The protrusion P80 includes, for example, a side surface P81 and a top surface P82. The side surface P81 includes a first side surface P81A and a second side surface P81B. The first side surface P81A is located in a first axial direction relative to the center of the protrusion P80 in the width direction. The second side surface P81B is located in a second axial direction relative to the center of the protrusion P80 in the width direction.

The protruding portion P80 includes, for example, a base portion P83, a top portion P84, and an intermediate portion P85. The base portion P83 is connected to the outer surface PF of the primary molding portion P located around the protruding portion P80. The top portion P84 includes a top surface P82. The intermediate portion P85 is located between the base portion P83 and the top portion P84 in the height direction of the protruding portion P80.

The following are examples of the configuration of the protrusion P80 related to release from the primary mold. In the first example, the protrusion P80 is configured to be a non-undercut relative to the primary mold. In the second example, the protrusion P80 is configured to be an undercut relative to the primary mold.

The width of the protrusion P80 is indicated, for example, by the distance between the first side surface P81A and the second side surface P81B in a cross section parallel to the third reference plane. An example of setting the width of the protrusion P80 in the height direction of the protrusion P80 is shown below.

In the first example, the width of the protrusion P80 decreases from the base P83 of the protrusion P80 toward the top P84. Figure 40 shows the first example. In the second example, the width of the protrusion P80 is constant in the height direction of the protrusion P80. In the third example, the width of the protrusion P80 increases from the base P83 of the protrusion P80 toward the top P84. In the fourth example, the width of the protrusion P80 increases from the middle P85 toward the base P83 and top P84.

In the secondary molding process, the resin material corresponding to the secondary molded portion Q passes around the protrusion P80. The protrusion P80 functions as a part that guides the flow of the resin material corresponding to the secondary molded portion Q. The flow of the resin material corresponding to the secondary molded portion Q differs between when the primary molded portion P includes the protrusion P80 and when the primary molded portion P does not include the protrusion P80.

The secondary molded portion Q includes a covering portion Q40. The covering portion Q40 includes a first peripheral end portion Q41 and a second peripheral end portion Q42. The first peripheral end portion Q41 includes an end surface Q41A. The second peripheral end portion Q42 includes an end surface Q42A.

The secondary molded portion Q includes a discontinuous portion Q43. The discontinuous portion Q43 is formed between end surface Q41A and end surface Q42A. A protrusion P80 is disposed in the discontinuous portion Q43. The end surface Q41A is joined to a first side surface P81A of the protrusion P80. The end surface Q42A is joined to a second side surface P81B of the protrusion P80.

Part or all of the top surface P82 of the protrusion P80 is not covered by the covering portion Q40. Part or all of the top surface P82 is exposed to the covering portion Q40. In an example in which the protrusion P80 is provided on the covering target portion PC of the primary molding part P, the protrusion P80 corresponds to the penetration portion P100 of the exposed structure 500. The exposed surface P101 is composed of part or all of the top surface P111.

The top surface P82 and the outer surface QF of the covering portion Q40 located around the top surface P82 constitute part of the outer surface 20F of the molded product 20. The covering portion Q40 is configured so that the top surface P82 and the outer surface QF of the covering portion Q40 are continuous. The portion of the outer surface 20F of the molded product 20 constituted by the outer surface QF of the covering portion Q40 and the top surface P82 is a smooth surface.

The restricting structure R includes a protruding portion R40 and a circumferential portion RQ. The protruding portion P80 of the primary molded portion P corresponds to the protruding portion R40 of the restricting structure R. The covering portion Q40 of the secondary molded portion Q corresponds to the circumferential portion RQ of the restricting structure R.

In one example, the primary molding portion P includes a recess P60 as exemplified in the underlying embodiment. The relationship between the recess P60 and the protrusion P80 is illustrated below.

In the first example, the recess P60 and the protrusion P80 are adjacently aligned in the axial direction. The recess P60 and the protrusion P80 are adjacent to each other. In the second example, the recess P60 and the protrusion P80 are aligned with a gap in the axial direction. In the third example, the recess P60 and the protrusion P80 are aligned with a gap in the circumferential direction. In the fourth example, the recess P60 and the protrusion P80 are aligned with a gap in the circumferential direction.

When the primary molded portion P includes a through portion P100 and a protruding portion P80, the following effects can be obtained, for example: It is more effective at suppressing deformation during secondary molding. It is believed that the provision of the protruding portion P80 has an effect of changing the flow of resin material corresponding to the secondary molded portion Q.

When the primary molded portion P includes a through portion P100, a recessed portion P60, and a protruding portion P80, the following effects can be obtained, for example: It is more effective at suppressing deformation during secondary molding. It is believed that the provision of the recessed portion P60 and the protruding portion P80 changes the flow of resin material corresponding to the secondary molded portion Q.

Tenth embodiment
The molded product 20 of this embodiment is configured based on the ninth embodiment. The molded product 20 of this embodiment includes components common to the underlying embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiment. Some or all of the description of the components common to the molded product 20 of the underlying embodiment will be omitted.

Please refer to Figure 41. Figure 41 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

In this embodiment, the configuration of the covering portion Q40 differs from the underlying embodiment. The covering portion Q40 includes an internal recess Q44. The internal recess Q44 is configured to be recessed radially relative to the inner surface of the covering portion Q40. The protrusion P80 is disposed in the internal recess Q44. The internal recess Q44 covers the top surface P82 of the protrusion P80.

Eleventh Embodiment
The molded product 20 of this embodiment is configured based on the ninth or tenth embodiment. The molded product 20 of this embodiment includes configurations in common with the underlying embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiment. Some or all of the description of the configurations in the molded product 20 of this embodiment that are common with the molded product 20 of the underlying embodiment will be omitted.

Please refer to Figure 42. Figure 42 shows a cross section of the molded product 20 parallel to the second reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molding portion P can take, for example, the following first or second configuration in relation to the protrusion P80. Figure 42 shows an example of the first configuration.

The primary molding part P of the first embodiment includes multiple recesses P60 and one protrusion P80. The multiple recesses P60 include a first recess P601 and a second recess P602. The protrusion P80 is located, for example, between the first recess P601 and the second recess P602. The primary molding part P of the second embodiment includes a configuration similar to that of the ninth or tenth embodiment.

The protrusion P80 includes a hollow portion P88. The hollow portion P88 is configured to form an undercut relative to the primary mold. The hollow portion P88 includes, for example, an internal space P88A and an inner circumferential surface P88B.

The internal space P88A is formed so that part of the secondary molded portion Q can be placed therein. The inner peripheral surface P88B defines the internal space P88A. The following is an example of the configuration of the protrusion P80.

In the first example, the internal space P88A penetrates the protrusion P80. The hollow portion P88 includes a first opening P88C and a second opening P88D. The central axis of the hollow portion P88 is, for example, parallel to a predetermined direction. The predetermined direction is, for example, the axial direction or the width direction.

The first opening P88C opens into the end face of the hollow portion P88 in the first axial direction. The second opening P88D opens into the end face of the hollow portion P88 in the second axial direction.

In the second example, the internal space P88A does not penetrate the protrusion P80. The hollow portion P88 includes one of the first opening P88C and the second opening P88D. The central axis of the hollow portion P88 is, for example, parallel to a predetermined direction. The predetermined direction is, for example, the axial direction or the width direction.

The secondary molded portion Q includes a hollow convex portion Q80. The hollow convex portion Q80 is disposed in the internal space P88A of the hollow portion P88. The hollow convex portion Q80 is configured to fill the internal space P88A. The hollow convex portion Q80 is joined to the inner peripheral surface P88B of the hollow portion P88.

When the form of the primary molded part P is the first form, the secondary molded part Q includes a plurality of internal convex parts Q60. The multiple internal convex parts Q60 include a first internal convex part Q60A and a second internal convex part Q60B. The first internal convex part Q60A is arranged in the first recessed part P601. The second internal convex part Q60B is arranged in the second recessed part P602. The hollow convex part Q80 is connected to one or both of the first internal convex part Q60A and the second internal convex part Q60B.

The restricting structure R includes an undercut portion R60. The hollow portion P88 of the primary molding portion P corresponds to the undercut portion R60 of the restricting structure R.

Twelfth Embodiment
The molded product 20 of this embodiment is configured based on the ninth to eleventh embodiments. The molded product 20 of this embodiment includes configurations common to the underlying embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiments. Some or all of the description of the configurations common to the molded product 20 of the underlying embodiments of the molded product 20 of this embodiment will be omitted.

Please refer to Figure 43. Figure 43 shows a plan view of the molded product 20. The protrusion P80 is configured to extend in the axial direction. The protrusion P80 includes a first end P80A, a second end P80B, and an intermediate portion P80C in the axial direction.

The first end P80A is located in the first axial direction relative to the center of the protrusion P80 in the axial direction. The second end P80B is located in the second axial direction relative to the center of the protrusion P80 in the axial direction. The middle portion P80C is located between the first end P80A and the second end P80B.

Examples of setting the width of the protrusion P80 in the extension direction of the protrusion P80 are shown below. In the first example, the width of the protrusion P80 increases from the first end P80A toward the second end P80B. Figure 43 shows the first example. In the second example, the width of the protrusion P80 decreases from the first end P80A toward the second end P80B.

In a third example, the width of the protrusion P80 increases from the intermediate portion P80C toward the first end P80A or the second end P80B. In a fourth example, the width of the protrusion P80 decreases from the intermediate portion P80C toward the first end P80A or the second end P80B. In a fifth example, the width of the protrusion P80 is constant in the axial direction.

Thirteenth Embodiment
The molded product 20 of this embodiment is configured based on the twelfth embodiment. The molded product 20 of this embodiment includes components common to the underlying embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiment. Some or all of the description of the components common to the molded product 20 of the underlying embodiment will be omitted.

Please refer to Figure 44. Figure 44 shows a plan view of the molded product 20. The setting of the width of the protrusion P80 in the extension direction of the protrusion P80 conforms to the underlying embodiment. In the illustrated example, the setting of the width of the protrusion P80 is the fifth example shown in the underlying embodiment.

The protrusion P80 includes a side undulating portion P86. The configuration of the side undulating portion P86 can be selected arbitrarily. The configuration of the side undulating portion P86 is not limited to the configuration shown in the example. The side undulating portion P86 is provided on the side surface P81 of the protrusion P80. The side undulating portion P86 is configured to impart undulations to the side surface P81 of the protrusion P80.

The side undulating portion P86 includes at least one of a first side undulating portion P86A and a second side undulating portion P86B. The first side undulating portion P86A is provided on the first side surface P81A. The second side undulating portion P86B is provided on the second side surface P81B.

The side undulating portion P86 includes one or more side recesses P87. The side recesses P87 are configured to be recessed relative to the side surface P81. The covering portion Q40 includes one or more protrusions Q45. The protrusions Q45 are disposed in the side recesses P87. The protrusions Q45 are configured to fill the spaces in the side recesses P87. The protrusions Q45 are bonded to the surfaces of the side recesses P87. The protrusions Q45 are provided to correspond to the configuration of the side undulating portion P86.

In an example in which the side undulating portion P86 includes a first side undulating portion P86A, one or more protrusions Q45 are provided on the first peripheral end Q41 of the covering portion Q40. The protrusions Q45 are configured to protrude from the end surface Q41A.

In an example in which the side undulating portion P86 includes the second side undulating portion P86B, one or more protrusions Q45 are provided on the second peripheral end portion Q42 of the covering portion Q40. The protrusions Q45 are configured to protrude from the end surface Q42A.

(Fourteenth embodiment)
The molded product 20 of this embodiment is configured based on any one of the ninth to thirteenth embodiments. The molded product 20 of this embodiment includes configurations common to the underlying embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the underlying embodiments will be omitted.

Please refer to Figure 45. Figure 45 shows a cross section of the molded product 20 parallel to the second reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molding portion P includes multiple recesses P60 and one protrusion P80. The multiple recesses P60 include a first recess P601 and a second recess P602. The protrusion P80 is located, for example, between the first recess P601 and the second recess P602 in the axial or width direction.

The protrusion P80 includes a hook P89. The configuration of the hook P89 can be selected arbitrarily. The configuration of the hook P89 is not limited to the configuration shown in the example. The hook P89 is configured to form an undercut in the primary mold.

In one example, the hook P89 is configured to protrude in a predetermined direction relative to the end face of the protrusion P80. The predetermined direction may be, for example, the axial direction or the width direction. The hook P89 includes a sloped surface P89A and a bottom surface P89B. The sloped surface P89A is inclined relative to the third reference plane or the second reference plane. The bottom surface P89B is parallel to the first reference plane.

The secondary molded portion Q includes an internal protrusion Q60 arranged in the first recess P601 and an internal protrusion Q60 arranged in the second recess P602. In one example, the internal protrusion Q60 arranged in the second recess P602 is joined to the inclined surface P89A and bottom surface P89B of the hook P89.

The restricting structure R includes an undercut portion R60. The hook P89 of the primary molding portion P corresponds to the undercut portion R60 of the restricting structure R.

(Fifteenth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to fourteenth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

Please refer to Figures 46 to 48. Figures 46 to 48 show cross sections of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment has been modified to fit the cross-sectional shape shown in the figures.

The recess P60 of the primary molding part P includes one or more wedge portions P64. The wedge portions P64 are configured so that a portion of the secondary molding part Q can be positioned therein. The wedge portions P64 are configured to form an undercut relative to the primary mold. The wedge portions P64 are provided, for example, at the bottom of the recess P60. The placement space P61 of the recess P60 includes the space formed by the wedge portions P64.

The covering portion Q40 of the secondary molded portion Q includes an internal protrusion Q60. The internal protrusion Q60 is arranged in the arrangement space P61 of the recess P60, which includes the space of the wedge portion P64. The internal protrusion Q60 is configured to fill the arrangement space P61 of the recess P60, which includes the space of the wedge portion P64. The internal protrusion Q60 is joined to the arrangement surface P62 of the recess P60, which includes the surface of the wedge portion P64.

The restricting structure R includes an undercut portion R60. The wedge portion P64 of the primary molding portion P corresponds to the undercut portion R60 of the restricting structure R.

Sixteenth Embodiment
The molded product 20 of this embodiment is configured based on any one of the first to fifteenth embodiments. The molded product 20 of this embodiment includes configurations in common with the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations in the molded product 20 of this embodiment that are common with the molded product 20 of the prerequisite embodiments will be omitted.

Please refer to Figure 49. Figure 49 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary body constituent portion PA of the primary molding portion P includes a main body hollow portion P90. The configuration of the main body hollow portion P90 can be selected arbitrarily. The configuration of the main body hollow portion P90 is not limited to the configuration shown in the example. The main body hollow portion P90 is configured to form an undercut in the primary mold.

The main body hollow portion P90 includes, for example, an internal space P90A and an inner peripheral surface P90B. The internal space P90A is formed so that a portion of the secondary molded portion Q can be placed therein. The inner peripheral surface P90B defines the internal space P90A. The following is an example of the configuration of the primary molded portion P related to the main body hollow portion P90.

In the first example, the internal space P90A does not penetrate the primary body component PA. The main body hollow portion P90 includes a first opening. The central axis of the main body hollow portion P90 is, for example, parallel to a predetermined direction. The predetermined direction is, for example, the axial direction or width direction. The first opening opens to the outer surface PF of the primary body component PA.

In the second example, the main body hollow portion P90 penetrates the primary main body component PA. The main body hollow portion P90 includes a first opening and a second opening. The central axis of the main body hollow portion P90 is, for example, parallel to a predetermined direction. The predetermined direction is, for example, the axial direction or the width direction. The first opening and the second opening open to the outer surface PF of the primary main body component PA.

The following are examples of the position of the main body hollow portion P90 in the axial direction of the primary main body component PA. In a first example, the main body hollow portion P90 is provided in the primary handle component P10. In a second example, the main body hollow portion P90 is provided in the neck 120. In a third example, the main body hollow portion P90 is provided in the head 130.

In a fourth example, the main body hollow portion P90 is provided in the primary handle component P10 and the neck 120. In a fifth example, the main body hollow portion P90 is provided in the neck 120 and the head 130. In a sixth example, the main body hollow portion P90 is provided in the primary handle component P10, the neck 120, and the head 130.

The secondary molded portion Q includes a main hollow convex portion Q90. The main hollow convex portion Q90 is disposed in the internal space P90A of the main hollow portion P90. The main hollow convex portion Q90 is configured to fill the internal space P90A. The main hollow convex portion Q90 is joined to the inner peripheral surface P90B of the main hollow portion P90.

The covering portion Q40 is connected to the main body hollow protrusion portion Q90 through at least one of the first opening and the second opening of the main body hollow portion P90.

The restricting structure R includes an undercut portion R60. The main body hollow portion P90 of the primary molding portion P corresponds to the undercut portion R60 of the restricting structure R.

(17th embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to sixteenth embodiments. The molded product 20 of this embodiment includes configurations in common with the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations in the molded product 20 of this embodiment that are common with the molded product 20 of the prerequisite embodiments will be omitted.

Please refer to Figure 50. Figure 50 shows a cross section of the molded product 20 parallel to the third reference plane. The configuration of the molded product 20 in this embodiment includes a configuration in which a portion of the molded product 20 in the underlying embodiment is modified to fit the shape of the cross section shown in the figure.

The primary molding portion P includes a plurality of recesses P60. The configuration of the plurality of recesses P60 can be selected arbitrarily. The configuration of the plurality of recesses P60 is not limited to the configuration illustrated. The plurality of recesses P60 includes, for example, a first recess P601, a second recess P602, and a third recess P603. The first recess P601 is located radially opposite the second recess P602 and the third recess P603.

The configuration of the first recess P601 and the second recess P602 conforms to the configuration of the first recess P601 and the second recess P602 in the eighth embodiment.

The third recess P603 is provided, for example, in the primary body forming part PA. The third recess P603 includes an arrangement space P61, an arrangement surface P62, and an opening P63. The arrangement space P61 is configured to be recessed relative to the outer surface PF of the primary molding part P. The arrangement surface P62 defines the arrangement space P61. The opening P63 opens to the outer surface PF of the primary molding part P.

The following are examples of the position of the third recess P603 in the circumferential direction of the primary molding portion P. In a first example, the third recess P603 is provided on the back surface of the primary molding portion P. In a second example, the third recess P603 is provided on the front surface of the primary molding portion P. In a third example, the third recess P603 is provided on the second side surface of the primary molding portion P. In a fourth example, the third recess P603 is provided on the first side surface of the primary molding portion P.

The following are examples of the position of the third recess P603 in the axial direction of the primary molding part P. In the first example, the third recess P603 is provided in the primary handle component P10. In the second example, the third recess P603 is provided in the neck 120. In the third example, the third recess P603 is provided in the head 130.

In a fourth example, the third recess P603 is provided in the primary handle component P10 and the neck 120. In a fifth example, the third recess P603 is provided in the neck 120 and the head 130. In a sixth example, the third recess P603 is provided in the primary handle component P10, the neck 120, and the head 130.

The following illustrates the relationship between the length of the first recess P601 in the axial direction and the lengths of the second recess P602 and the third recess P603. In the first example, the length of the first recess P601 is longer than the lengths of the second recess P602 and the third recess P603. In the second example, the length of the first recess P601 is shorter than the lengths of the second recess P602 and the third recess P603. In the third example, the length of the first recess P601 is equal to the lengths of the second recess P602 and the third recess P603.

The following illustrates the relationship between the length of the second recess P602 and the length of the third recess P603 in the axial direction. In the first example, the length of the second recess P602 is longer than the length of the third recess P603. In the second example, the length of the second recess P602 is shorter than the length of the third recess P603. In the third example, the length of the second recess P602 is equal to the length of the third recess P603.

The following illustrates the relationship between the length of the first recess P601 in the circumferential direction and the lengths of the second recess P602 and the third recess P603. In the first example, the length of the first recess P601 is longer than the lengths of the second recess P602 and the third recess P603. In the second example, the length of the first recess P601 is shorter than the lengths of the second recess P602 and the third recess P603. In the third example, the length of the first recess P601 is equal to the lengths of the second recess P602 and the third recess P603.

The following illustrates the relationship between the length of the second recess P602 and the length of the third recess P603 in the circumferential direction. In the first example, the length of the second recess P602 is longer than the length of the third recess P603. In the second example, the length of the second recess P602 is shorter than the length of the third recess P603. In the third example, the length of the second recess P602 is equal to the length of the third recess P603.

The primary molding portion P includes a protruding portion P80. The protruding portion P80 is located circumferentially between the second recess P602 and the third recess P603. The protruding portion P80 protrudes radially from the bottom surface of the placement surface P62 of the second recess P602 and the bottom surface of the placement surface P62 of the third recess P603. The protruding portion P80 is configured to form an undercut in the primary mold.

The secondary molded portion Q includes multiple covered portions Q40. The configuration of the multiple covered portions Q40 can be selected arbitrarily. The configuration of the multiple covered portions Q40 is not limited to the configuration shown in the example. The multiple covered portions Q40 include, for example, a first covered portion Q401, a second covered portion Q402, and a third covered portion Q403.

The first covering portion Q401 is disposed in the first recess P601. The first covering portion Q401 is configured to fill the placement space P61 of the first recess P601. The first covering portion Q401 includes a first peripheral end portion Q41 and a second peripheral end portion Q42. The first covering portion Q401 is bonded to the placement surface P62 of the first recess P601.

The second covering portion Q402 is disposed in the second recess P602. The second covering portion Q402 is configured to fill the placement space P61 of the second recess P602. The second covering portion Q402 includes a first peripheral end portion Q41 and a second peripheral end portion Q42. The second covering portion Q402 is joined to the placement surface P62 of the second recess P602.

The third covering portion Q403 is disposed in the third recess P603. The third covering portion Q403 is configured to fill the placement space P61 of the third recess P603. The third covering portion Q403 includes a first peripheral end portion Q41 and a second peripheral end portion Q42. The third covering portion Q403 is joined to the placement surface P62 of the third recess P603.

In one example, the secondary molded portion Q includes at least one of a first connection portion to a third connection portion. The first connection portion connects the first covered portion Q401 and the second covered portion Q402. The second connection portion connects the first covered portion Q401 and the third covered portion Q403. The third connection portion connects the second covered portion Q402 and the third covered portion Q403. Each connection portion is provided on the outer surface PF of the primary molded portion P or in a hole that penetrates the primary molded portion P.

The restricting structure R includes a placement portion R50 and an undercut portion R60. The recess P60 of the primary molding portion P corresponds to the placement portion R50 of the restricting structure R. The protrusion P80 of the primary molding portion P corresponds to the undercut portion R60 of the restricting structure R.

(18th embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to seventeenth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The surface undulations 410 of this embodiment include a plurality of geometrically shaped surfaces 420. The configuration of the surface undulations 410, including the shape and arrangement of the geometrically shaped surfaces 420, can be selected arbitrarily.

The total number of geometrically shaped surfaces 420 included in the surface undulations 410 is referred to as the "total number of surfaces GNT." In one example, the total number of surfaces GNT falls within a predetermined range for the total number of surfaces GNT. Examples of the predetermined range are given below. In a first example, the predetermined range is equal to or greater than the lower limit number of surfaces GNT1. In a second example, the predetermined range is equal to or less than the upper limit number of surfaces GNT2. In a third example, the predetermined range is equal to or greater than the lower limit number of surfaces GNT1 and equal to or less than the upper limit number of surfaces GNT2.

The lower limit number of faces GNT1 is selected from, for example, 4, 12, or 20. The upper limit number of faces GNT2 is selected from, for example, 100, 150, or 200. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 4 to 100. In Example 3B, the specified range is 4 to 150. In Example 3C, the specified range is 4 to 200.

In example 3D, the specified range is 12 to 100. In example 3E, the specified range is 12 to 150. In example 3F, the specified range is 12 to 200.

In Example 3G, the specified range is 20 to 100. In Example 3H, the specified range is 20 to 150. In Example 3I, the specified range is 20 to 200.

If the total number of faces GNT is equal to or greater than the lower limit number of faces GNT1, the surface undulations 410 will be more noticeable. If the total number of faces GNT is equal to or less than the upper limit number of faces GNT2, there will be more room to form faces other than the geometrically shaped faces 420 on the outer surface of the molded product 20.

The sum of the areas of the individual geometrically shaped surfaces 420 is referred to as the "total area GST." In one example, the total area GST is included in a predetermined range for the total area GST. Examples of the predetermined range are given below. In a first example, the predetermined range is equal to or greater than the lower limit area GST1. In a second example, the predetermined range is equal to or less than the upper limit area GST2. In a third example, the predetermined range is equal to or greater than the lower limit area GST1 and equal to or less than the upper limit area GST2.

The lower limit area GST1 is selected from, for example, 28 mm ² , 84 mm ² , or 140 mm ² . The upper limit area GST2 is selected from, for example, 700 mm ² , 1050 mm ² , or 1400 mm ² . Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 28 mm ² and 700 mm ^2. In Example 3B, the predetermined range is between 28 mm ² and 1050 mm ^2. In Example 3C, the predetermined range is between 28 mm ² and 1400 mm ² .

In Example 3D, the predetermined range is between 84 mm ² and 700 mm ^2. In Example 3E, the predetermined range is between 84 mm ² and 1050 mm ^2. In Example 3F, the predetermined range is between 84 mm ² and 1400 mm ² .

In Example 3G, the predetermined range is between 140 mm ² and 700 mm ^2. In Example 3H, the predetermined range is between 140 mm ² and 1050 mm ^2. In Example 3I, the predetermined range is between 140 mm ² and 1400 mm ² .

If the total area GST is equal to or greater than the lower limit area GST1, the surface undulations 410 will be more noticeable. If the total area GST is equal to or less than the upper limit area GST2, there will be more room to form surfaces other than the geometrically shaped surface 420 on the outer surface of the molded product 20.

The ratio of the total area GST to the surface area of the molded product 20 is referred to as the "total area ratio." In one example, the total area ratio falls within a predetermined range for the total area ratio. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit area ratio GSX1. In the second example, the predetermined range is equal to or less than the upper limit area ratio GSX2. In the third example, the predetermined range is equal to or greater than the lower limit area ratio GSX1 and equal to or less than the upper limit area ratio GSX2.

The lower limit area ratio GSX1 is selected from, for example, 0.6%, 1.8%, or 3.1%. The upper limit area ratio GSX2 is selected from, for example, 16%, 24%, or 32%. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 0.6% to 16%. In Example 3B, the specified range is 0.6% to 24%. In Example 3C, the specified range is 0.6% to 32%.

In Example 3D, the specified range is 1.8% to 16%. In Example 3E, the specified range is 1.8% to 24%. In Example 3F, the specified range is 1.8% to 32%.

In Example 3G, the specified range is 3.1% to 16%. In Example 3H, the specified range is 3.1% to 24%. In Example 3I, the specified range is 3.1% to 32%.

If the total area ratio is equal to or greater than the lower limit area ratio GSX1, the surface undulations 410 will be more noticeable. If the total area ratio is equal to or less than the upper limit area ratio GSX2, there will be more room to form surfaces other than the geometrically shaped surface 420 on the outer surface of the molded article 20.

Nineteenth Embodiment
The molded product 20 of this embodiment is configured based on any one of the first to eighteenth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The surface undulations 410 of this embodiment include at least one mountain-shaped portion 430. The angle at the apex of the mountain-shaped portion 430 is referred to as the "apex angle GGA." The apex angle GGA corresponds to the angle formed by the two geometrically shaped surfaces 420 that share a side corresponding to the apex of the mountain-shaped portion 430.

In one example, the apex angle GGA is included in a predetermined range for the apex angle GGA. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit angle GGA1. In the second example, the predetermined range is equal to or less than the upper limit angle GGA2. In the third example, the predetermined range is equal to or greater than the lower limit angle GGA1 and equal to or less than the upper limit angle GGA2.

The lower limit angle GGA1 is selected from, for example, 45°, 90°, or 135°. The upper limit angle GGA2 is selected from, for example, 170°, 175°, or 180°. Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 45° to 170°. In Example 3B, the specified range is 45° to 175°. In Example 3C, the specified range is 45° to 180°.

In Example 3D, the specified range is 90° to 170°. In Example 3E, the specified range is 90° to 175°. In Example 3F, the specified range is 90° to 180°.

In Example 3G, the specified range is 135° to 170°. In Example 3H, the specified range is 135° to 175°. In Example 3I, the specified range is 135° to 180°.

When the apex angle GGA is equal to or greater than the lower limit angle GGA1, the mountain-shaped portion 430 becomes more noticeable. When the apex angle GGA is equal to or less than the upper limit angle GGA2, the height of the mountain-shaped portion 430 becomes more likely to be reduced.

(Twentyth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to nineteenth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The surface undulations 410 of this embodiment include at least one valley-shaped portion 440. The angle of the bottom of the valley-shaped portion 440 is referred to as the "bottom angle GGB." The bottom angle GGB corresponds to the angle formed by the two geometrically shaped surfaces 420 that share a side corresponding to the bottom of the valley-shaped portion 440.

In one example, the bottom angle GGB is included in a predetermined range for the bottom angle GGB. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit angle GGB1. In the second example, the predetermined range is equal to or less than the upper limit angle GGB2. In the third example, the predetermined range is equal to or greater than the lower limit angle GGB1 and equal to or less than the upper limit angle GGB2.

The lower limit angle GGB1 is selected from, for example, 45°, 90°, or 135°. The upper limit angle GGB2 is selected from, for example, 170°, 175°, or 180°. Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 45° to 170°. In Example 3B, the specified range is 45° to 175°. In Example 3C, the specified range is 45° to 180°.

In Example 3D, the specified range is 90° to 170°. In Example 3E, the specified range is 90° to 175°. In Example 3F, the specified range is 90° to 180°.

In Example 3G, the specified range is 135° to 170°. In Example 3H, the specified range is 135° to 175°. In Example 3I, the specified range is 135° to 180°.

When the bottom angle GGB is equal to or greater than the lower limit angle GGB1, the valley-shaped portion 440 becomes more noticeable. When the bottom angle GGB is equal to or less than the upper limit angle GGB2, the depth of the valley-shaped portion 440 becomes more likely to be reduced.

(Twenty-first embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twentieth embodiments. The molded product 20 of this embodiment includes configurations in common with the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations in the molded product 20 of this embodiment that are common with the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the surface undulation portion 410 includes a plurality of geometrically shaped surfaces 420. The arrangement of the plurality of geometrically shaped surfaces 420 is the 111th arrangement. The surface undulation portion 410 includes one 111th group. The plurality of geometrically shaped surfaces 420 includes a plurality of first-type geometrically shaped surfaces 421 and a plurality of second-type geometrically shaped surfaces 422.

The total number of first-type geometric shape surfaces 421 included in the surface undulations 410 is referred to as the "first-type surface number GNA." In one example, the first-type surface number GNA falls within a predetermined range for the first-type surface number GNA. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit surface number GNA1. In the second example, the predetermined range is equal to or less than the upper limit surface number GNA2. In the third example, the predetermined range is equal to or greater than the lower limit surface number GNA1 and equal to or less than the upper limit surface number GNA2.

The lower limit number of faces GNA1 is selected from, for example, 4, 12, or 20. The upper limit number of faces GNA2 is selected from, for example, 100, 150, or 200. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 4 to 100. In Example 3B, the specified range is 4 to 150. In Example 3C, the specified range is 4 to 200.

In example 3D, the specified range is 12 to 100. In example 3E, the specified range is 12 to 150. In example 3F, the specified range is 12 to 200.

In Example 3G, the specified range is 20 to 100. In Example 3H, the specified range is 20 to 150. In Example 3I, the specified range is 20 to 200.

When the number of first type surfaces GNA is equal to or greater than the lower limit number of surfaces GNA1, the first type geometric shape surfaces 421 become more noticeable. When the number of first type surfaces GNA is equal to or less than the upper limit number of surfaces GNA2, there is more room to form the second type geometric shape surfaces 422.

The total number of second-type geometric shape surfaces 422 included in the surface undulations 410 is referred to as the "second-type surface number GNB." In one example, the second-type surface number GNB falls within a predetermined range for the second-type surface number GNB. Examples of the predetermined range are given below. In a first example, the predetermined range is equal to or greater than the lower limit surface number GNB1. In a second example, the predetermined range is equal to or less than the upper limit surface number GNB2. In a third example, the predetermined range is equal to or greater than the lower limit surface number GNB1 and equal to or less than the upper limit surface number GNB2.

The lower limit number of faces GNB1 is selected from, for example, 1, 8, or 15. The upper limit number of faces GNB2 is selected from, for example, 20, 30, or 40. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is 1 to 20. In Example 3B, the predetermined range is 1 to 30. In Example 3C, the predetermined range is 1 to 40.

In Example 3D, the specified range is 8 to 20. In Example 3E, the specified range is 8 to 30. In Example 3F, the specified range is 8 to 40.

In Example 3G, the specified range is 15 to 20. In Example 3H, the specified range is 15 to 30. In Example 3I, the specified range is 15 to 40.

When the number of second-type surfaces GNB is equal to or greater than the lower limit number of surfaces GNB1, the surface undulations 410 can be formed from two types of surfaces: first-type geometric shape surfaces 421 and second-type geometric shape surfaces 422. When the number of second-type surfaces GNB is equal to or less than the upper limit number of surfaces GNB2, there is more room to form the first-type geometric shape surfaces 421.

The ratio of the first type face number GNA to the total face number GNT is referred to as the "first type face number rate." In one example, the first type face number rate falls within a predetermined range for the first type face number rate. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit face number rate GN11. In the second example, the predetermined range is equal to or less than the upper limit face number rate GN12. In the third example, the predetermined range is equal to or greater than the lower limit face number rate GN11 and equal to or less than the upper limit face number rate GN12.

The lower limit surface ratio GN11 is selected from, for example, 9%, 28%, or 50%. The upper limit surface ratio GN12 is selected from, for example, 87%, 95%, or 99%. Examples of the predetermined range for the third example include Examples 3A to 3I below.

In Example 3A, the specified range is 9% to 87%. In Example 3B, the specified range is 9% to 95%. In Example 3C, the specified range is 9% to 99%.

In example 3D, the specified range is 28% to 87%. In example 3E, the specified range is 28% to 95%. In example 3F, the specified range is 28% to 99%.

In Example 3G, the specified range is 50% to 87%. In Example 3H, the specified range is 50% to 95%. In Example 3I, the specified range is 50% to 99%.

When the first type surface number rate is equal to or greater than the lower limit surface number rate GN11, the first type geometric shape surface 421 becomes more noticeable. When the first type surface number rate is equal to or less than the upper limit surface number rate GN12, there is more room to form the second type geometric shape surface 422.

The ratio of the second type face number GNB to the total face number GNT is referred to as the "second type face number rate." In one example, the second type face number rate falls within a predetermined range for the second type face number rate. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit face number rate GN21. In the second example, the predetermined range is equal to or less than the upper limit face number rate GN22. In the third example, the predetermined range is equal to or greater than the lower limit face number rate GN21 and equal to or less than the upper limit face number rate GN22.

The lower limit surface ratio GN21 is selected from, for example, 1%, 5%, or 13%. The upper limit surface ratio GN22 is selected from, for example, 50%, 72%, or 91%. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 1% to 50%. In Example 3B, the specified range is 1% to 72%. In Example 3C, the specified range is 1% to 91%.

In Example 3D, the specified range is 5% to 50%. In Example 3E, the specified range is 5% to 72%. In Example 3F, the specified range is 5% to 91%.

In Example 3G, the specified range is 13% to 50%. In Example 3H, the specified range is 13% to 72%. In Example 3I, the specified range is 13% to 91%.

When the second-type surface number rate is equal to or greater than the lower limit surface number rate GN21, the surface undulations 410 can be formed from two types of surfaces: the first-type geometric shape surface 421 and the second-type geometric shape surface 422. When the second-type surface number rate is equal to or less than the upper limit surface number rate GN22, there is more room to form the first-type geometric shape surface 421.

The area of the first type geometric shape surface 421 is referred to as the "first type area GSA." In one example, the first type area GSA is included in a predetermined range for the first type area GSA. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit area GSA1. In the second example, the predetermined range is equal to or less than the upper limit area GSA2. In the third example, the predetermined range is equal to or greater than the lower limit area GSA1 and equal to or less than the upper limit area GSA2.

The lower limit area GSA1 is selected from, for example, 0.2 mm ² , 1 mm ² , or 2 mm ^2. The upper limit area GSA2 is selected from, for example, 30 mm ² , 40 mm ² , or 50 mm ^2. Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 0.2 mm ² and 30 mm ^2. In Example 3B, the predetermined range is between 0.2 mm ² and 40 mm ^2. In Example 3C, the predetermined range is between 0.2 mm ² and 50 mm ² .

In Example 3D, the predetermined range is between 1 mm ² and 30 mm ^2. In Example 3E, the predetermined range is between 1 mm ² and 40 mm ^2. In Example 3F, the predetermined range is between 1 mm ² and 50 mm ² .

In Example 3G, the predetermined range is between 2 mm ² and 30 mm ^2. In Example 3H, the predetermined range is between 2 mm ² and 40 mm ^2. In Example 3I, the predetermined range is between 2 mm ² and 50 mm ² .

When the first type area GSA is equal to or greater than the lower limit area GSA1, the first type geometric shape surface 421 becomes more noticeable. When the first type area GSA is equal to or less than the upper limit area GSA2, there is more room to form the second type geometric shape surface 422.

The area of the second type geometric shape surface 422 is referred to as the "second type area GSB." In one example, the second type area GSB is included in a predetermined range for the second type area GSB. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit area GSB1. In the second example, the predetermined range is equal to or less than the upper limit area GSB2. In the third example, the predetermined range is equal to or greater than the lower limit area GSB1 and equal to or less than the upper limit area GSB2.

The lower limit area GSB1 is selected from, for example, 0.2 mm ² , 1 mm ² , or 2 mm ^2. The upper limit area GSB2 is selected from, for example, 30 mm ² , 40 mm ² , or 50 mm ^2. Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 0.2 mm ² and 30 mm ^2. In Example 3B, the predetermined range is between 0.2 mm ² and 40 mm ^2. In Example 3C, the predetermined range is between 0.2 mm ² and 50 mm ² .

In Example 3D, the predetermined range is between 1 mm ² and 30 mm ^2. In Example 3E, the predetermined range is between 1 mm ² and 40 mm ^2. In Example 3F, the predetermined range is between 1 mm ² and 50 mm ² .

In Example 3G, the predetermined range is between 2 mm ² and 30 mm ^2. In Example 3H, the predetermined range is between 2 mm ² and 40 mm ^2. In Example 3I, the predetermined range is between 2 mm ² and 50 mm ² .

When the second type area GSB is equal to or greater than the lower limit area GSB1, the second type geometric shape surface 422 becomes more noticeable. When the second type area GSB is equal to or less than the upper limit area GSB2, there is more room to form the first type geometric shape surface 421.

The sum of the areas of the individual first-type geometric shape surfaces 421 is referred to as the "first-type total area GSAT." In one example, the first-type total area GSAT is included in a predetermined range for the first-type total area GSAT. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit area GSAT1. In the second example, the predetermined range is equal to or less than the upper limit area GSAT2. In the third example, the predetermined range is equal to or greater than the lower limit area GSAT1 and equal to or less than the upper limit area GSAT2.

The lower limit area GSAT1 is selected from, for example, 28 mm ² , 84 mm ² , or 140 mm ² . The upper limit area GSAT2 is selected from, for example, 500 mm ² , 750 mm ² , or 1000 mm ² . Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 28 mm ² and 500 mm ^2. In Example 3B, the predetermined range is between 28 mm ² and 750 mm ^2. In Example 3C, the predetermined range is between 28 mm ² and 1000 mm ² .

In Example 3D, the predetermined range is between 84 mm ² and 500 mm ^2. In Example 3E, the predetermined range is between 84 mm ² and 750 mm ^2. In Example 3F, the predetermined range is between 84 mm ² and 1000 mm ² .

In Example 3G, the predetermined range is between 140 mm ² and 500 mm ^2. In Example 3H, the predetermined range is between 140 mm ² and 750 mm ^2. In Example 3I, the predetermined range is between 140 mm ² and 1000 mm ² .

When the first type total area GSAT is equal to or greater than the lower limit area GSAT1, the first type geometric shape surface 421 becomes more noticeable. When the first type total area GSAT is equal to or less than the upper limit area GSAT2, there is more room to form the second type geometric shape surface 422.

The sum of the areas of the individual second-type geometric shape surfaces 422 is referred to as the "second-type total area GSBT." In one example, the second-type total area GSBT is included in a predetermined range for the second-type total area GSBT. Examples of the predetermined range are given below. In a first example, the predetermined range is equal to or greater than the lower limit area GSBT1. In a second example, the predetermined range is equal to or less than the upper limit area GSBT2. In a third example, the predetermined range is equal to or greater than the lower limit area GSBT1 and equal to or less than the upper limit area GSBT2.

The lower limit area GSBT1 is selected from, for example, 2.8 mm ² , 16.8 mm ² , or 28 mm ^2. The upper limit area GSBT2 is selected from, for example, 100 mm ² , 150 mm ² , or 200 mm ^2. Examples of the predetermined range in the third example include the following examples 3A to 3I.

In Example 3A, the predetermined range is between 2.8 mm ² and 100 mm ^2. In Example 3B, the predetermined range is between 2.8 mm ² and 150 mm ^2. In Example 3C, the predetermined range is between 2.8 mm ² and 200 mm ² .

In Example 3D, the predetermined range is between 16.8 mm ^{2 and 100 mm 2. In Example 3E, the predetermined range is between 16.8 mm 2 and 150 mm 2. In Example 3F, the predetermined range is between 16.8 mm 2 and 200 mm 2 .}

In Example 3G, the predetermined range is between 28 mm ² and 100 mm ^2. In Example 3H, the predetermined range is between 28 mm ² and 150 mm ^2. In Example 3I, the predetermined range is between 28 mm ² and 200 mm ² .

When the second type total area GSBT is equal to or greater than the lower limit area GSBT1, the second type geometric shape surface 422 becomes more noticeable. When the second type total area GSBT is equal to or less than the upper limit area GSBT2, there is more room to form the first type geometric shape surface 421.

The ratio of the first type total area GSAT to the total area GST is referred to as the "first type area ratio." In one example, the first area ratio falls within a predetermined range for the first area ratio. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit area ratio GS11. In the second example, the predetermined range is equal to or less than the upper limit area ratio GS12. In the third example, the predetermined range is equal to or greater than the lower limit area ratio GS11 and equal to or less than the upper limit area ratio GS12.

The lower limit area ratio GS11 is selected from, for example, 2%, 8%, or 20%. The upper limit area ratio GS12 is selected from, for example, 95%, 98%, or 99%. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 2% to 95%. In Example 3B, the specified range is 2% to 98%. In Example 3C, the specified range is 2% to 99%.

In example 3D, the specified range is 8% to 95%. In example 3E, the specified range is 8% to 98%. In example 3F, the specified range is 8% to 99%.

In Example 3G, the specified range is 20% to 95%. In Example 3H, the specified range is 20% to 98%. In Example 3I, the specified range is 20% to 99%.

When the first area ratio is equal to or greater than the lower limit area ratio GS11, the first type geometric shape surface 421 becomes more noticeable. When the first area ratio is equal to or less than the upper limit area ratio GS12, there is more room to form the second type geometric shape surface 422.

The ratio of the second type total area GSBT to the total area GST is referred to as the "second type area ratio." In one example, the second area ratio falls within a predetermined range for the second area ratio. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit area ratio GS21. In the second example, the predetermined range is equal to or less than the upper limit area ratio GS22. In the third example, the predetermined range is equal to or greater than the lower limit area ratio GS21 and equal to or less than the upper limit area ratio GS22.

The lower limit area ratio GS21 is selected from, for example, 1%, 2%, or 4%. The upper limit area ratio GS22 is selected from, for example, 42%, 64%, or 88%. Examples of the predetermined range for the third example include the following examples 3A to 3I.

In Example 3A, the specified range is 1% to 42%. In Example 3B, the specified range is 1% to 64%. In Example 3C, the specified range is 1% to 88%.

In Example 3D, the specified range is 2% to 42%. In Example 3E, the specified range is 2% to 64%. In Example 3F, the specified range is 2% to 88%.

In Example 3G, the specified range is 4% to 42%. In Example 3H, the specified range is 4% to 64%. In Example 3I, the specified range is 4% to 88%.

When the second area ratio is equal to or greater than the lower limit area ratio GS21, the second type geometric shape surface 422 becomes more noticeable. When the second area ratio is equal to or less than the upper limit area ratio GS22, there is more room to form the first type geometric shape surface 421.

(Twenty-second embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twenty-first embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The maximum outer diameter of the protrusion 220 is referred to as the "outer diameter RP." The size of the outer diameter RP can be selected arbitrarily. The size of the outer diameter RP is not limited to the size shown in the example. In one example, the outer diameter RP is equal to the maximum width of the protrusion 220.

In one example, the outer diameter RP is within a predetermined range. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit outer diameter. In the second example, the predetermined range is equal to or less than the upper limit outer diameter. In the third example, the predetermined range is equal to or greater than the lower limit outer diameter and equal to or less than the upper limit outer diameter.

The lower limit outer diameter is selected from, for example, 0.5 mm or 1 mm. The upper limit outer diameter is selected from, for example, 3 mm or 7 mm. Examples of the specified range for the third example include the following examples 31 to 34.

In the 31st example, the specified range is 0.5 mm to 3 mm. In the 32nd example, the specified range is 0.5 mm to 7 mm. In the 33rd example, the specified range is 1 mm to 3 mm. In the 34th example, the specified range is 1 mm to 7 mm.

When the outer diameter RP is equal to or greater than the lower limit outer diameter, the protrusion 220 is less likely to be damaged. When the outer diameter RP is equal to or less than the upper limit outer diameter, the protrusion 220 is easier to remove.

(Twenty-third embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twenty-second embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The length of the protrusion 220 in the axial direction is referred to as "length LP." In one example, length LP falls within a predetermined range. Examples of the predetermined range are given below. In the first example, the predetermined range is equal to or greater than the lower limit length. In the second example, the predetermined range is equal to or less than the upper limit length. In the third example, the predetermined range is equal to or greater than the lower limit length and equal to or less than the upper limit length.

The lower limit length is selected from, for example, 0.5 mm or 5 mm. The upper limit length is selected from, for example, 25 mm or 30 mm. Examples of the third example of the predetermined range include the following examples 31 to 34.

In the 31st example, the specified range is 0.5 mm to 25 mm. In the 32nd example, the specified range is 0.5 mm to 30 mm. In the 33rd example, the specified range is 5 mm to 25 mm. In the 34th example, the specified range is 5 mm to 30 mm.

If the length LP is equal to or greater than the lower limit length, there is greater freedom in selecting the ejector pin configuration. If the length LP is equal to or less than the upper limit length, it becomes easier to remove the protrusion 220.

(Twenty-fourth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twenty-third embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The maximum outer diameter of the handle 110 is referred to as the "outer diameter RA." The value obtained by dividing the outer diameter RP by the outer diameter RA is referred to as the "first outer diameter ratio." The size of the outer diameter RA can be selected arbitrarily. The size of the outer diameter RA is not limited to the size shown in the example. In one example, the outer diameter RA is equal to the maximum width of the handle 110.

The maximum outer diameter of the neck 120 is referred to as the "outer diameter RB." The value obtained by dividing the outer diameter RP by the outer diameter RB is referred to as the "second outer diameter ratio." The size of the outer diameter RB can be selected arbitrarily. The size of the outer diameter RB is not limited to the size shown in the example. In one example, the outer diameter RB is equal to the maximum width of the neck 120.

The maximum outer diameter of the head 130 is referred to as the "outer diameter RC." The value obtained by dividing the outer diameter RP by the outer diameter RC is referred to as the "third outer diameter ratio." The size of the outer diameter RC can be selected arbitrarily. The size of the outer diameter RC is not limited to the size shown in the example. In one example, the outer diameter RC is equal to the maximum width of the head 130.

In one example, the first outer diameter ratio is included in a predetermined range related to the first outer diameter ratio. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit ratio X11. In the second example, the predetermined range is equal to or less than the upper limit ratio X12. In the third example, the predetermined range is equal to or greater than the lower limit ratio X11 and equal to or less than the upper limit ratio X12.

The lower limit ratio X11 is selected from, for example, 0.02 or 0.06. The upper limit ratio X12 is selected from, for example, 0.3 or 1.4. Examples of the third example of the predetermined range include the following examples 31 to 34.

In the 31st example, the specified range is 0.02 to 0.3. In the 32nd example, the specified range is 0.02 to 1.4. In the 33rd example, the specified range is 0.06 to 0.3. In the 34th example, the specified range is 0.06 to 1.4.

When the first outer diameter ratio is equal to or greater than the lower limit ratio X11, the protrusion 220 is less likely to be damaged. When the first outer diameter ratio is equal to or less than the upper limit ratio X12, the protrusion 220 is easier to remove.

In one example, the second outer diameter ratio is included in a predetermined range related to the second outer diameter ratio. Examples of the predetermined range are as follows: In a first example, the predetermined range is a range equal to or greater than the lower limit ratio X21. In a second example, the predetermined range is a range equal to or less than the upper limit ratio X22. In a third example, the predetermined range is a range equal to or greater than the lower limit ratio X21 and equal to or less than the upper limit ratio X22.

The lower limit ratio X21 is selected from, for example, 0.04 or 0.2. The upper limit ratio X22 is selected from, for example, 0.8 or 7. Examples of the third example of the predetermined range include the following examples 31 to 34.

In the 31st example, the specified range is 0.04 to 0.8. In the 32nd example, the specified range is 0.04 to 7. In the 33rd example, the specified range is 0.2 to 0.8. In the 34th example, the specified range is 0.2 to 7.

When the second outer diameter ratio is equal to or greater than the lower limit ratio X21, the protrusion 220 is less likely to be damaged. When the second outer diameter ratio is equal to or less than the upper limit ratio X22, the protrusion 220 is easier to remove.

In one example, the third outer diameter ratio is included in a predetermined range related to the third outer diameter ratio. Examples of the predetermined range are as follows: In a first example, the predetermined range is a range equal to or greater than the lower limit ratio X31. In a second example, the predetermined range is a range equal to or less than the upper limit ratio X32. In a third example, the predetermined range is a range equal to or greater than the lower limit ratio X31 and equal to or less than the upper limit ratio X32.

The lower limit ratio X31 is selected from, for example, 0.02 or 0.06. The upper limit ratio X32 is selected from, for example, 0.3 or 2.3. Examples of the third example of the predetermined range include the following examples 31 to 34.

In the 31st example, the specified range is 0.02 to 0.3. In the 32nd example, the specified range is 0.02 to 2.3. In the 33rd example, the specified range is 0.06 to 0.3. In the 34th example, the specified range is 0.06 to 2.3.

When the third outer diameter ratio is equal to or greater than the lower limit ratio X31, the protrusion 220 is less likely to be damaged. When the third outer diameter ratio is equal to or less than the upper limit ratio X32, the protrusion 220 is easier to remove.

(Twenty-fifth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twenty-fourth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The length of the handle 110 in the axial direction is referred to as "length LA." The length of the neck 120 in the axial direction is referred to as "length LB." The length of the head 130 in the axial direction is referred to as "length LC." The value obtained by dividing length LP by length LA is referred to as the "first length ratio." The value obtained by dividing length LP by length LB is referred to as the "second length ratio." The value obtained by dividing length LP by length LC is referred to as the "third length ratio."

In one example, the first length ratio is included in a predetermined range for the first length ratio. Examples of the predetermined range are as follows: In the first example, the predetermined range is a range equal to or greater than the lower limit ratio Y11. In the second example, the predetermined range is a range equal to or less than the upper limit ratio Y12. In the third example, the predetermined range is a range equal to or greater than the lower limit ratio Y11 and equal to or less than the upper limit ratio Y12.

The lower limit ratio Y11 is selected from, for example, 0.003 or 0.05. The upper limit ratio Y12 is selected from, for example, 0.8 or 1.5. Examples of the third example of the predetermined range include the following examples 31 to 34.

In the 31st example, the specified range is 0.003 to 0.8. In the 32nd example, the specified range is 0.003 to 1.5. In the 33rd example, the specified range is 0.05 to 0.8. In the 34th example, the specified range is 0.05 to 1.5.

When the first length ratio is equal to or greater than the lower limit ratio Y11, the freedom of choice regarding the ejector pin configuration is increased. When the first length ratio is equal to or less than the upper limit ratio Y12, the protrusion 220 becomes easier to remove.

In one example, the second length ratio is included in a predetermined range for the second length ratio. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit ratio Y21. In the second example, the predetermined range is equal to or less than the upper limit ratio Y22. In the third example, the predetermined range is equal to or greater than the lower limit ratio Y21 and equal to or less than the upper limit ratio Y22.

The lower limit ratio Y21 is selected from, for example, 0.003 or 0.04. The upper limit ratio Y22 is selected from, for example, 0.9 or 3. Examples of the third example of the predetermined range include the following examples 31 to 34.

In the 31st example, the specified range is 0.003 to 0.9. In the 32nd example, the specified range is 0.003 to 3. In the 33rd example, the specified range is 0.04 to 0.9. In the 34th example, the specified range is 0.04 to 3.

When the second length ratio is equal to or greater than the lower limit ratio Y21, the freedom of choice regarding the ejector pin configuration is increased. When the second length ratio is equal to or less than the upper limit ratio Y22, the protrusion 220 becomes easier to remove.

In one example, the third length ratio is included in a predetermined range for the third length ratio. Examples of the predetermined range are as follows: In the first example, the predetermined range is equal to or greater than the lower limit ratio Y31. In the second example, the predetermined range is equal to or less than the upper limit ratio Y32. In the third example, the predetermined range is equal to or greater than the lower limit ratio Y31 and equal to or less than the upper limit ratio Y32.

The lower limit ratio Y31 is selected from, for example, 0.01 or 0.09. The upper limit ratio Y32 is selected from, for example, 1.2 or 8.6. Examples of the third example of the predetermined range include the following examples 31 to 34.

In example 31, the specified range is 0.01 to 1.2. In example 32, the specified range is 0.01 to 8.6. In example 33, the specified range is 0.09 to 1.2. In example 34, the specified range is 0.09 to 8.6.

When the third length ratio is equal to or greater than the lower limit ratio Y31, the freedom of choice regarding the ejector pin configuration is increased. When the third length ratio is equal to or less than the upper limit ratio Y32, the protrusion 220 becomes easier to remove.

(Twenty-sixth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twenty-fifth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the position of the protrusion 220 relative to the main body 100 in the molded product 20 differs from the previous embodiment. Examples of the position of the protrusion 220 include the following.

In Example 11, the protrusion 220 is connected to the first side portion P10C of the primary handle component P10 of the primary molded part P. The protrusion 220 protrudes in the first width direction relative to the primary handle component P10.

In Example 12, the protrusion 220 is connected to the second side portion P10D of the primary handle component P10 of the primary molded part P. The protrusion 220 protrudes in the second width direction relative to the primary handle component P10.

In Example 13, the protrusion 220 is connected to the front surface of the primary handle component P10 of the primary molding part P. The protrusion 220 protrudes in the first thickness direction relative to the primary handle component P10.

In Example 21, the protrusion 220 is connected to the first side 120C of the neck 120. The protrusion 220 protrudes in the first width direction relative to the neck 120.

In Example 22, the protrusion 220 is connected to the second side 120D of the neck 120. The protrusion 220 protrudes in the second width direction relative to the neck 120.

In Example 23, the protrusion 220 is connected to the front surface of the neck 120. The protrusion 220 protrudes in the first thickness direction relative to the neck 120.

In Example 31, the protrusion 220 is connected to the first side 130C of the head 130. The protrusion 220 protrudes in the first width direction relative to the head 130.

In Example 32, the protrusion 220 is connected to the second side 130D of the head 130. The protrusion 220 protrudes in the second width direction relative to the head 130.

In Example 33, the protrusion 220 is connected to the front surface of the head 130. The protrusion 220 protrudes in the first thickness direction relative to the head 130.

In Example 34, the protrusion 220 is connected to the first end 130A of the head 130. The protrusion 220 protrudes in the first axial direction relative to the head 130.

The configuration illustrated in the embodiment provides the following advantages, for example:

In one example of the molded product 20, the protrusion 220 is provided on the front surface of the primary handle component P10 of the primary molded part P.

The above configuration provides the following advantages, for example: An ejector pin can be positioned in a position corresponding to the front of the primary handle component P10 of the primary molding part P. During the primary extrusion process or secondary extrusion process, the ejector pin can push the protrusion 220.

The primary molded part P can be removed from the primary mold without using an ejector pin to press the front of the outer surface PF of the primary handle component P10. The molded product 20 can be removed from the secondary mold without using an ejector pin to press the front of the outer surface QF of the secondary handle component Q10. This is expected to improve the design of the oral care product 10. Foreign matter is less likely to accumulate on the surface of the main body 100.

(Twenty-seventh embodiment)
The molded product 20 of this embodiment is configured based on the 26th embodiment. The molded product 20 of this embodiment includes components common to the underlying embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiment. Some or all of the description of the components common to the molded product 20 of the underlying embodiment will be omitted.

In this embodiment, the number of protrusions 220 on the molded product 20 differs from the previous embodiment. The pressable structure 200 includes multiple protrusions 220. The following are examples of the configuration of the multiple protrusions 220.

In Example S, the pressure-receiving structure 200 includes the protrusion 220 of the first embodiment and at least one of the protrusions 220 of Examples 11 to 34 of the 26th embodiment.

In Example T, the pressed structure 200 includes at least two of the protrusions 220 of Examples 11 to 34 of the 26th embodiment. The pressed structure 200 does not include the protrusion 220 of the first embodiment.

Examples included in Example S include the following:

In example S11, the pressed structure 200 includes at least one of the protrusion 220 of the first embodiment, the protrusion 220 of example 11 of the 26th embodiment, and the protrusion 220 of example 12.

In example S12, the pressure-receiving structure 200 is constructed based on example S11. The pressure-receiving structure 200 does not include the specific portion 210.

In example S13, the pressed structure 200 includes the protrusion 220 of the first embodiment and the protrusion 220 of example 13 of the 26th embodiment.

In example S14, the pressure-receiving structure 200 is constructed based on example S13. The pressure-receiving structure 200 does not include the specific portion 210.

In example S21, the pressed structure 200 includes at least one of the protrusion 220 of the first embodiment, the protrusion 220 of example 21 of the 26th embodiment, and the protrusion 220 of example 22.

In example S22, the pressure-receiving structure 200 is constructed based on example S21. The pressure-receiving structure 200 does not include the specific portion 210.

In example S23, the pressed structure 200 includes the protrusion 220 of the first embodiment and the protrusion 220 of example 23 of the 26th embodiment.

In example S24, the pressure-receiving structure 200 is constructed based on example S23. The pressure-receiving structure 200 does not include the specific portion 210.

In example S31, the pressed structure 200 includes at least one of the protrusion 220 of the first embodiment, the protrusion 220 of example 31 of the 26th embodiment, and the protrusion 220 of example 32.

In example S32, the pressure-receiving structure 200 is constructed based on example S31. The pressure-receiving structure 200 does not include the specific portion 210.

In example S33, the pressed structure 200 includes the protrusion 220 of the first embodiment and the protrusion 220 of example 33 of the 26th embodiment.

In example S34, the pressure-receiving structure 200 is constructed based on example S33. The pressure-receiving structure 200 does not include the specific portion 210.

In example S35, the pressed structure 200 includes the protrusion 220 of the first embodiment and the protrusion 220 of example 34 of the 26th embodiment.

In example S36, the pressure-receiving structure 200 is constructed based on example S35. The pressure-receiving structure 200 does not include the specific portion 210.

Examples included in Example T include the following:

In example T11, the pressed structure 200 includes the protrusion 220 of example 11 of the 26th embodiment and the protrusion 220 of example 12.

In Example T12, the pressure-receiving structure 200 is constructed based on Example T11. The pressure-receiving structure 200 does not include the specific portion 210.

In example T13, the pressed structure 200 includes the protrusion 220 of example 11 of the 26th embodiment, the protrusion 220 of example 12, the protrusion 220 of example 21, and the protrusion 220 of example 22.

In Example T14, the pressure-receiving structure 200 is constructed based on Example T13. The pressure-receiving structure 200 does not include the specific portion 210.

In example T15, the pressed structure 200 includes the protrusion 220 of example 11 of the 26th embodiment, the protrusion 220 of example 12, the protrusion 220 of example 31, and the protrusion 220 of example 32.

In Example T16, the pressure-receiving structure 200 is constructed based on Example T15. The pressure-receiving structure 200 does not include the specific portion 210.

In example T17, the pressed structure 200 includes the protrusion 220 of example 21, the protrusion 220 of example 22, the protrusion 220 of example 31, and the protrusion 220 of example 32 of the 26th embodiment.

In example T18, the pressure-receiving structure 200 is constructed based on example T17. The pressure-receiving structure 200 does not include the specific portion 210.

In example T19, the pressed structure 200 includes the protrusion 220 of example 11, the protrusion 220 of example 12, the protrusion 220 of example 21, the protrusion 220 of example 22, the protrusion 220 of example 31, and the protrusion 220 of example 32 of the 26th embodiment.

In example T20, the pressure-receiving structure 200 is constructed based on example T19. The pressure-receiving structure 200 does not include the specific portion 210.

In Example T21, the pressed structure 200 is configured based on any of Examples T11 to T20. The pressed structure 200 further includes at least one of the protrusion 220 of Example 13 of the 26th embodiment, the protrusion 220 of Example 23, and the protrusion 220 of Example 33.

In example T22, the pressed structure 200 includes at least two of the protrusion 220 of example 13 of the 26th embodiment, the protrusion 220 of example 23, and the protrusion 220 of example 33.

In example T23, the pressure-receiving structure 200 is constructed based on example T22. The pressure-receiving structure 200 does not include the specific portion 210.

In Example T24, the pressure-receiving structure 200 is configured based on any of Examples T11 to T23. The pressure-receiving structure 200 further includes the protrusion 220 of Example 34 of the 26th embodiment.

The following are examples of the shapes of the multiple protrusions 220 when the pressable structure 200 includes multiple protrusions 220. In the first example, the multiple protrusions 220 have the same shape. In the second example, the multiple protrusions 220 have different shapes. In the third example, at least two of the multiple protrusions 220 have the same shape. In the fourth example, at least two of the multiple protrusions 220 have different shapes.

(Twenty-eighth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to twenty-seventh embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the position of the specific portion 210 and the position of the protrusion 220 in the molded product 20 differ from the previous embodiment. The specific portion 210 is provided on the back surface of the primary molded portion P. In a first example, the specific portion 210 is provided on the back surface of the head 130. In a second example, the specific portion 210 is provided on the back surface of the neck 120. In a third example, the specific portion 210 is provided on the back surface of the handle 110.

With regard to examples relating to the position of the protrusion 220, examples 11, 12, 21, 22, 31, 32, and 34 of the 26th embodiment are also common to this embodiment.

Other examples of the position of the protrusion 220 include the following:

In Example 14, the protrusion 220 is connected to the rear surface of the primary handle component P10 of the primary molded part P. The protrusion 220 protrudes in the second thickness direction relative to the primary handle component P10.

In Example 24, the protrusion 220 is connected to the back surface of the neck 120. The protrusion 220 protrudes in the second thickness direction relative to the neck 120.

In Example 35, the protrusion 220 is connected to the back surface of the head 130. The protrusion 220 protrudes in the second thickness direction relative to the head 130.

The configuration illustrated in the embodiment provides the following advantages, for example:

In one example of the molded product 20, the protrusion 220 is provided on the back surface of the primary handle component P10 of the primary molded part P.

The above configuration provides the following advantages, for example: An ejector pin can be positioned at a position corresponding to the back surface of the primary handle component P10 of the primary molding part P. During the primary extrusion process or secondary extrusion process, the ejector pin can push the protrusion 220.

The primary molded part P can be removed from the primary mold without using an ejector pin to press the back surface of the outer surface PF of the primary handle component P10. The molded product 20 can be removed from the secondary mold without using an ejector pin to press the back surface of the outer surface QF of the secondary handle component Q10. This is expected to improve the design of the oral care product 10. Foreign matter is less likely to accumulate on the surface of the main body 100.

Twenty-ninth embodiment
The molded product 20 of this embodiment is configured based on any one of the first to twenty-eighth embodiments. The molded product 20 of this embodiment includes configurations in common with the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations in the molded product 20 of this embodiment that are common with the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the manufacturing method of the molded product 20 and the shape of the toothbrush 10A provided to the user differ from the underlying embodiment. The manufacturing method of the molded product 20, which is a pre-process for manufacturing the toothbrush 10A, does not include a removal step. A molded product 20 from which the protrusion 220 has not been removed is provided to the user.

The protrusion 220 may be configured as a portion to be removed 300, or as a portion not to be removed that is not intended to be removed from the molded product 20.

When the protrusion 220 is configured as the portion to be removed 300, the user can select whether or not the protrusion 220 will be removed from the molded product 20.

Examples of how a user might use toothbrush 10A are given below. In the first example, toothbrush 10A including protrusion 220 is used to clean teeth. In the second example, protrusion 220 is removed by the user. Toothbrush 10A without protrusion 220 is used to clean teeth.

Thirty-first embodiment
The molded product 20 of this embodiment is configured based on the twenty-ninth embodiment. The molded product 20 of this embodiment includes components common to the underlying embodiment. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the underlying embodiment. Some or all of the description of the components common to the molded product 20 of the underlying embodiment will be omitted.

In this embodiment, the structure of the protrusion 220 in the molded product 20 differs from the underlying embodiment. The protrusion 220 includes a functional portion. The following are examples of the configuration of the functional portion.

In a first example, the functional part includes a first attachment part. The first attachment part is configured, for example, to be able to fit with a first type of object. Examples of the first type of object include a stand and a holder.

In a second example, the functional part includes a second attachment part. The second attachment part is configured, for example, to allow attachment of a second type of object. An example of the second type of object is an aid related to oral care. Examples of the aid include a brush and a mirror.

In a third example, the functional portion includes an opening. The opening has a hole. The opening is configured to allow a third type of object to be inserted. Examples of the third type of object include a hook and a strap.

In a fourth example, the functional part includes a hook. The hook is configured to be able to be hooked onto the holder.

Thirty-first embodiment
The molded product 20 of this embodiment is configured based on any one of the first to thirtieth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will show the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The molded article 20 is a single-color molded article. In the first example, the molded article 20 has the same appearance as the molded article 20 in the underlying embodiment. The mold used to mold the molded article 20 includes a cavity corresponding to the shape of the molded article 20 in the underlying embodiment. In the second example, the molded article 20 includes a primary molded portion P, but does not include a secondary molded portion Q. The mold used to mold the primary molded portion P includes a cavity corresponding to the shape of the primary molded portion P in the underlying embodiment.

Thirty-second embodiment
The molded product 20 of this embodiment is configured based on any one of the first to thirtieth embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

The secondary molded portion Q includes a secondary main body component QA and one or more protrusions. The protrusions of the secondary molded portion Q are configured in accordance with the protrusions 220 of the primary molded portion P in the underlying embodiment.

The protrusions of the secondary molded portion Q are classified into, for example, a secondary handle protrusion provided on the handle 110, a secondary neck protrusion provided on the neck 120, and a secondary head protrusion provided on the head 130.

In examples where the secondary molded portion Q includes a secondary handle protrusion, the secondary body component QA includes a secondary handle component Q10 and one or more secondary handle protrusions.

The secondary handle protrusion is provided on the secondary handle component Q10. The configuration of the secondary handle protrusion conforms to the configuration of the protrusion 220 provided on the primary handle component P10 in the underlying embodiment.

The following illustrates an example of the relationship between the secondary handle protrusion and the protrusion 220 of the primary molding part P. In the first example, the secondary handle protrusion is configured to cover the corresponding protrusion 220 of the primary molding part P.

In a second example, the secondary handle protrusion is configured to replace the corresponding protrusion 220 of the primary molded part P. The corresponding protrusion 220 of the primary molded part P is omitted. In a third example, the secondary handle protrusion is provided at a location separate from the protrusion 220 of the primary molded part P.

In an example in which the secondary molded portion Q includes a secondary neck protrusion, the secondary body component QA includes a secondary handle component Q10, a secondary neck component, and one or more secondary neck protrusions. The secondary neck component is provided on the outer surface PF of the neck 120 of the primary body component PA.

The secondary neck protrusion is provided on the secondary neck component. The configuration of the secondary neck protrusion conforms to the configuration of the protrusion 220 provided on the neck 120 in the underlying embodiment.

The following illustrates an example of the relationship between the secondary neck protrusion and the protrusion 220 of the primary molding part P. In the first example, the secondary neck protrusion is configured to cover the corresponding protrusion 220 of the primary molding part P.

In a second example, the secondary neck protrusion is configured to replace the corresponding protrusion 220 of the primary molding part P. The corresponding protrusion 220 of the primary molding part P is omitted. In a third example, the secondary neck protrusion is provided at a location separate from the protrusion 220 of the primary molding part P.

In examples where the secondary molding portion Q includes a secondary head protrusion, the secondary body component QA includes a secondary handle component Q10, a secondary head component, and one or more secondary head protrusions. The secondary head component is provided on the outer surface PF of the head 130 of the primary body component PA.

The secondary head protrusion is provided on the secondary head component. The configuration of the secondary head protrusion conforms to the configuration of the protrusion 220 provided on the head 130 in the underlying embodiment.

The following illustrates the relationship between the secondary head protrusion and the protrusion 220 of the primary molding part P.

In the first example, the secondary head protrusion is configured to cover the protrusion 220 of the corresponding primary molding part P.

In the second example, the secondary head protrusion is configured to replace the protrusion 220 of the corresponding primary molding part P. The protrusion 220 of the corresponding primary molding part P is omitted.

In the third example, the secondary head protrusion is provided at a location separate from the protrusion 220 of the primary molding part P.

(Thirty-third embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to thirty-second embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the oral care product 10 is an interdental brush. The interdental brush includes a molded product and a functional component. The molded product includes a configuration similar to that of molded product 20 of toothbrush 10A exemplified in the underlying embodiment. The manufacturing method for the molded product includes steps similar to the manufacturing method for molded product 20.

(Thirty-fourth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to thirty-second embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the oral care product 10 is a mucous membrane care brush. The mucous membrane care brush includes a molded product and a functional component. The molded product includes a configuration similar to that of molded product 20 of toothbrush 10A exemplified in the underlying embodiment. The manufacturing method for the molded product includes steps similar to the manufacturing method for molded product 20.

(Thirty-fifth embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to thirty-second embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the oral care product 10 is a floss with a holder. The floss with a holder includes a molded product and a functional component. The molded product includes a configuration similar to that of the molded product 20 of the toothbrush 10A exemplified in the underlying embodiment. The manufacturing method for the molded product includes steps similar to the manufacturing method for the molded product 20.

(36th embodiment)
The molded product 20 of this embodiment is configured based on any one of the first to thirty-second embodiments. The molded product 20 of this embodiment includes configurations common to the prerequisite embodiments. The following description will focus on the main differences between the molded product 20 of this embodiment and the molded product 20 of the prerequisite embodiments. Some or all of the description of the configurations common to the molded product 20 of the present embodiment and the molded product 20 of the prerequisite embodiments will be omitted.

In this embodiment, the oral care product 10 is a check mirror. The check mirror includes a molded product and a functional component. The molded product includes a configuration similar to that of the molded product 20 of the toothbrush 10A exemplified in the underlying embodiment. The manufacturing method for the molded product includes steps similar to the manufacturing method for the molded product 20.

(Example)
Please refer to Figure 51. Figure 51 shows an example of the results of a measurement test to measure the characteristics of toothbrush 10A. The measurement item in the measurement test was the magnitude of vertical deformation of primary molded portion P. Thirty types of samples were used in the measurement test.

Each item in the diagram indicates the following: "Type 1" indicates "Type 1 total volume." "Type 2" indicates "Type 2 total volume." "Type 3" indicates "Type 3 total volume." "Multiple types" indicates "Multiple types total volume."

The total volume of the first type, the total volume of the second type, the total volume of the third type, and the total volume of multiple types for each sample are determined as shown in the figure. The configurations of samples 1 to 29 conform to the configuration of the first embodiment. The configuration of sample 30 differs from the configuration of the first embodiment in that it does not include the exposed structure 500, but conforms to the configuration of the first embodiment in other respects.

The exposed structures 500 of samples 1 to 13 include three first-type through-portions P100X1, three second-type through-portions P100X2, and one third-type through-portion P100X3. The first-type through-portion P100X1 is a first-type A through-portion. The second-type through-portion P100X2 is a second-type A through-portion. The third-type through-portion P100X3 is a third-type A through-portion.

The exposed structures 500 of samples 14 to 19 include three type 2 through-holes P100X2 and one type 3 through-hole P100X3. The type 1 through-hole P100X1 is a type 1A through-hole. The type 2 through-hole P100X2 is a type 2A through-hole. The type 3 through-hole P100X3 is a type 3A through-hole.

The exposed structures 500 of samples 20 to 25 include three second-type through-holes P100X2. The second-type through-holes P100X2 are second-type A through-holes.

The exposed structure 500 of the 26th sample includes three first-type through-portions P100X1 and three second-type through-portions P100X3. The first-type through-portions P100X1 are first-type A through-portions. The second-type through-portions P100X2 are second-type A through-portions.

The exposed structure 500 of the 27th sample includes three first-type through-portions P100X1 and one third-type through-portion P100X3. The first-type through-portion P100X1 is a first-type A through-portion. The third-type through-portion P100X3 is a third-type A through-portion.

The exposed structure 500 of the 28th sample includes three first-type through-portions P100X1. The first-type through-portions P100X1 are first-type A through-portions.

The exposed structure 500 of the 29th sample includes one type 3 through-hole P100X3. The type 3 through-hole P100X3 is a type 3A through-hole.

In the measurement test, a secondary molding process was carried out using each sample to produce a molded product 20. The condition of the molded product 20 was visually inspected. The condition of the inspected molded product 20 was classified into one of five levels.

The first level is when the following condition is confirmed: No vertical or horizontal deformation has occurred in the coating target portion PC. The second level is when the following condition is confirmed: At least one of vertical and horizontal deformation has occurred in the coating target portion PC. The degree of deformation is small. The portion of the coating target portion PC where vertical or horizontal deformation has occurred is covered by the coating portion Q40.

The third level occurs when the following conditions are confirmed: At least one of vertical and horizontal deformation has occurred in the coating target portion PC. The degree of deformation is greater than in the second level. At least a portion of the deformed portion of the coating target portion PC is exposed to the outer surface QF of the coating portion Q40. The area of the exposed portion of the coating target portion PC is small.

The fourth level occurs when the following condition is confirmed: At least one of vertical and horizontal deformation has occurred in the coating target portion PC. The degree of deformation is greater than in the third level. At least a portion of the deformed portion of the coating target portion PC is exposed to the outer surface QF of the coating portion Q40. The area of the exposed portion of the coating target portion PC is larger than in the third level.

The fifth level occurs when the following condition is confirmed: At least one of vertical and horizontal deformation has occurred in the coating target portion PC. The degree of deformation is greater than in the fourth level. At least a portion of the deformed portion of the coating target portion PC is exposed to the outer surface QF of the coating portion Q40. The area of the exposed portion of the coating target portion PC is larger than in the fourth level.

In the "Measurement Results" column of Figure 51, the condition of the molded article 20 is indicated as follows: "A" indicates that the condition of the molded article 20, as confirmed visually, falls under the first level. "B" indicates that the condition of the molded article 20, as confirmed visually, falls under the second level. "C" indicates that the condition of the molded article 20, as confirmed visually, falls under the third level. "D" indicates that the condition of the molded article 20, as confirmed visually, falls under the fourth level. "E" indicates that the condition of the molded article 20, as confirmed visually, falls under the fifth level.

Note that the possible forms of the molded oral care product and oral care product related to the present invention are not limited to the descriptions in the above embodiments. The molded oral care product and oral care product related to the present invention may take forms different from those exemplified in the embodiments. Examples include forms in which part of the configuration of each embodiment is replaced, modified, or omitted, or forms in which new configuration is added to each embodiment.

10: Oral care product 10A: Toothbrush 20: Molded product 500: Exposed structure P: Primary molded part PC: Part to be covered PCA: First end PCB: Second end PCC: Middle part P60: Recess P61: Arrangement space P80: Protrusion P100: Penetration part P100X1: First type penetrating part P100X2: Second type penetrating part P100X3: Third type penetrating part P101: Exposed surface Q: Secondary molded part Q40: Covered part

Claims (19)

The main body and
a primary molding part including a part to be coated;
a secondary molding part including a covering part that covers the covering target part;
an exposure structure including one or more penetration portions that penetrate the covering portion;
the through-hole is provided in the primary molding portion and includes an exposed surface exposed to the covering portion,
the portion to be coated includes a first end, a second end, and an intermediate portion in an axial direction of the body ;
the exposed structure includes at least one of a first type through portion that is the through portion located at least at the first end portion, a second type through portion that is the through portion located at least at the second end portion, and a third type through portion that is the through portion located at least at the intermediate portion,
the body includes a handle, a neck, and a head;
the primary molding portion includes a primary body forming portion that forms the body,
the primary body component includes a primary handle component that configures the handle, and the covered portion;
the primary handle component includes a constricted portion;
the constricted portion includes a constricted portion first end, a constricted portion second end, and a constricted portion intermediate portion;
the first end portion of the constricted portion and the second end portion of the constricted portion constitute a thick portion of the constricted portion,
the constricted portion intermediate portion is a portion that constitutes a narrow portion of the constricted portion between the constricted portion first end portion and the constricted portion second end portion,
the first end is provided on the neck side in the axial direction and includes the constricted portion first end,
the second end portion is provided on the opposite side to the first end portion in the axial direction and includes the constricted portion second end portion,
the intermediate portion is provided between the first end portion and the second end portion in the axial direction and includes the constricted portion intermediate portion,
The through portion is provided in the constricted portion.
Molded oral care products. The molded oral care product according to claim 1 , wherein the through-hole is configured to protrude from the outer surface of the part to be covered. the exposure structure includes the first type penetrating portion,
The molded oral care product according to claim 1 or 2, wherein the first type through-hole is provided at a first end of the constricted portion . The total volume of all the first type penetration parts is within the range of 1 ^mm3 or more.
A molded oral care product according to claim 3 . The total volume of all the first type penetration parts is within the range of 100 ^mm3 or less.
A molded oral care product according to claim 3 or 4 . the exposure structure includes the second type through portion,
The second type penetrating portion is provided at a second end of the constricted portion.
A molded oral care product according to any one of claims 1 to 5 . The total volume of all the second type penetration parts is in the range of 1 ^mm3 or more.
A molded oral care product according to claim 6 . The total volume of all the second type penetration parts is within the range of 100 ^mm3 or less.
A molded oral care product according to claim 6 or 7 . the exposure structure includes the first type through portion and the second type through portion,
the first type penetrating portion is provided at a first end of the constricted portion,
the second type penetrating portion is provided at a second end of the constricted portion,
The molded oral care product according to any one of claims 1 to 8, wherein the total volume of all of the first type penetrating portions and the total volume of all of the second type penetrating portions is within a range of ² mm3 or more. The sum of the volume of all the first type penetration parts and the volume of all the second type penetration parts is within the range of 200 ^mm3 or less.
A molded oral care product according to claim 9 . the exposure structure includes the third type through portion,
The third type penetrating portion is provided in the middle of the constricted portion.
A molded oral care product according to any one of claims 1 to 10 . The total volume of all the third-type penetration parts is in the range of 1 ^mm3 or more.
A molded oral care product according to claim 11 . The total volume of all the third-type penetration parts is within the range of 100 ^mm3 or less.
A molded oral care product according to claim 11 or 12 . the primary molding portion includes a recess including an arrangement space;
The arrangement space is configured so that a part of the secondary molding part can be arranged therein.
A molded oral care product according to any one of claims 1 to 13 . The primary molding portion includes a protrusion that is covered by the covering portion.
A molded oral care product according to any one of claims 1 to 14 . The material of the secondary molding part includes a transparent resin or a translucent resin.
A molded oral care product according to any one of claims 1 to 15 . The material of the primary molding portion includes polyacetal, polypropylene, or saturated polyester resin.
A molded oral care product according to any one of claims 1 to 16 . It is a molded toothbrush product.
A molded oral care product according to any one of claims 1 to 17 . An oral care product comprising a molded oral care product according to any one of claims 1 to 18 .