JP7740787B2 - eyelash curler - Google Patents

Description

The present invention relates to an eyelash curler.

Generally, eyelash curlers (curlers) are designed using the principle of leverage and are made of metal such as stainless steel and are operated using two fingers.

However, with typical metal eyelash curlers that use the principle of leverage, the gripping part is made by twisting a single metal rod to form a ring shape, while the other parts have two metal rods extending side by side. This means that the cross-section of the metal at the gripping part is thin, making it difficult to hold. Furthermore, people with metal allergies cannot use them.

In order to prevent metal allergies and to make the product gentler on the skin, eyelash curlers have been proposed in which the gripping part that comes into contact with the fingers and the contact surface that comes into contact with the eyelid are partially covered with resin over the metal, or in which some components are made of resin (for example, Patent Document 1 and Patent Document 2).

There are also eyelash curlers with springs that are made entirely of resin, without using metal on the exterior (for example, Patent Document 3).

Japanese Utility Model Application Publication No. 59-40002 Japanese Patent Application Publication No. 2007-68695 Japanese Patent Application Publication No. 2004-57581

However, as in Patent Documents 1 and 2, when a resin part is attached to a metal eyelash curler or when a part is replaced with resin, the number of manufacturing steps required for assembly increases compared to eyelash curlers made of metal alone, resulting in reduced productivity.

Furthermore, when attempting to create a plastic eyelash curler with the same shape as a typical metal eyelash curler, the curler would not have enough strength to clamp the curler, so the eyelash curler shown in Patent Document 3, which has an entirely plastic exterior, is equipped with a spring for clamping. However, the addition of a spring results in a complex and large structure. Furthermore, this structure does not resemble the appearance of a typical metal eyelash curler, which uses a lever, and the operation method is different.

In light of the above, the present invention aims to provide a resin eyelash curler that is not larger than typical metal curlers, yet maintains strength and can be operated in the same way as a metal curler.

In order to solve the above problem, one aspect of the present invention is to
a fixing member integrally formed with the upper press portion;
An operating member that allows the lower press unit to move up and down relative to the upper press unit;
a force application member that moves the acting member up and down by rotating around a portion that engages with the fixed member as a fulcrum,
the fixing member, the acting member, and the force application member are each integrally formed from resin,
The fixing member is integrally formed with the upper press section, a first handle on which a user places their fingers, a first arm section extending in the vertical direction, a hole frame section located above the first arm section and having a support hole section formed therein, and a pair of support posts that branch into two from a joining section at the upper end of the hole frame section and support both ends of the upper press section;
the force application member is integrally formed with a second handle on which the user places his/her fingers, an extending second arm portion, and a tip portion that is positioned above the second arm portion and is inserted into the hole frame portion,
When a direction perpendicular to the direction in which the force application member rotates is defined as a depth direction, and a direction perpendicular to the depth direction in a cross section of the fixing member and the force application member is defined as a thickness direction,
In the fixing member, the first handle is ring-shaped, branching from a lower end of the first arm portion toward one side in the thickness direction, expanding, and folding back to form a finger hole;
In the force application member, the second handle is ring-shaped, branching from a lower end of the second arm portion toward the other side in the thickness direction, bulging out, and folding back to form a finger hole;
the first arm portion, the first handle, the second arm portion, and the second handle have the same width in the depth direction and the same thickness in the thickness direction;
the first arm portion of the fixing member is composed of one piece, and the second arm portion of the force application member is composed of one piece,
the tip end of the force application member is narrower in width in the depth direction than the second handle and the second arm portion,
In the fixing member, the first arm portion is longer in the vertical direction than the support hole portion.
Furthermore, another aspect of the present invention is
a fixing member integrally formed with the upper press portion;
An operating member that allows the lower press unit to move up and down relative to the upper press unit;
a force application member that moves the acting member up and down by rotating around a portion that engages with the fixed member as a fulcrum,
the fixing member, the acting member, and the force application member are each integrally formed from resin,
The fixing member is integrally formed with the upper press section, a first handle on which a user places their fingers, a first arm section extending in the vertical direction, a hole frame section located above the first arm section and having a support hole section formed therein, and a pair of support posts that branch into two from a joining section at the upper end of the hole frame section and support both ends of the upper press section;
the force application member is integrally formed with a second handle on which the user places his/her fingers, an extending second arm portion, and a tip portion that is positioned above the second arm portion and is inserted into the hole frame portion,
When a direction perpendicular to the direction in which the force application member rotates is defined as a depth direction, and a direction perpendicular to the depth direction in a cross section of the fixing member and the force application member is defined as a thickness direction,
In the fixing member, the first handle is ring-shaped, branching from a lower end of the first arm portion toward one side in the thickness direction, expanding, and folding back to form a finger hole;
In the force application member, the second handle is ring-shaped, branching from a lower end of the second arm portion toward the other side in the thickness direction, bulging out, and folding back to form a finger hole;
The upper surface of the second arm portion is formed with a wavy uneven shape,
the tip end of the force application member is narrower in width in the depth direction than the second handle and the second arm portion,
the first arm portion, the first handle, the second arm portion, and the second handle have the same width in the depth direction;
the first arm portion of the fixing member is composed of one piece, and the second arm portion of the force application member is composed of one piece,
In the fixing member, the first arm portion is longer in the vertical direction than the support hole portion.

According to one aspect, a resin eyelash curler can be operated in the same way as a metal one, while maintaining its strength and being no larger than a typical metal eyelash curler.

1 is an overall perspective view (part 1) of an eyelash curler according to a first embodiment of the present invention; FIG. FIG. 2 is a second overall perspective view of the eyelash curler according to the first embodiment. FIG. 2 is an exploded view of the eyelash curler according to the first embodiment. FIG. 1 is a front view of an eyelash curler according to a first embodiment. FIG. 2 is a rear view of the eyelash curler according to the first embodiment. FIG. 1 is a front perspective view of a metal eyelash curler according to a comparative example. FIG. 10 is a rear perspective view of a metal eyelash curler of a comparative example. FIG. 1 is a diagram illustrating the fulcrum and load point of an eyelash curler. A diagram explaining the support points and load points when approximating a simple spring beam structure. FIG. 2 is a cross-sectional view of a beam portion of the eyelash curler. 10A and 10B are diagrams showing examples of the configuration of the eyelash curler of the present invention, taking into consideration the force ratio and movable angle at the force application members. FIG. 10 is a diagram showing an example of the configuration of an eyelash curler in which the force ratio at the force application members is taken into consideration. This is a table showing the evaluation results when eyelash curlers were formed using multiple materials. FIG. 1 shows the feasible range of resins for eyelash curlers based on Young's modulus and section modulus. FIG. 10 is an overall perspective view of a partial eyelash curler according to a modified example of the first embodiment of the present invention. FIG. 1 is a general perspective view (part 1) of an eyelash curler according to a second embodiment of the present invention. FIG. 10 is a second overall perspective view of the eyelash curler according to the second embodiment. FIG. 10 is an exploded view of the eyelash curler according to the second embodiment. FIG. 10 is a front view of the eyelash curler according to the second embodiment. FIG. 10 is a rear view of the eyelash curler of the second embodiment.

The following describes an embodiment of the present invention with reference to the drawings. In the drawings, identical components are designated by the same reference numerals, and duplicate explanations may be omitted.

The present invention relates to a resin eyelash curler (an eyelash curler for the entire eyelash area, an eyelash curler for specific areas).

First Embodiment
Fig. 1 is an overall perspective view of an eyelash curler according to a first embodiment of the present invention. Fig. 2 is an overall perspective view of the eyelash curler according to the first embodiment, seen from a different direction than that shown in Fig. 1. Fig. 3 is an exploded view of the eyelash curler shown in Fig. 1.

The eyelash curler 1 of this embodiment has a similar structure to a typical metal eyelash curler, with each component integrally formed from a resin, as described below.

The eyelash curler 1 has a fixing member 10, a force application member 20, and an action member 30.

The fixed member (also called the support section) 10 has an upper press section 11, parallel support columns 12A and 12B, inclined support columns 13A and 13B, an arm 14, and a handle 16. The arm 14, which serves as the handle, has a support hole 15 formed in it. The arm 14 also exists above the support hole 15, and above the support hole 15 is a junction 141J where it joins with the inclined support columns 13A and 13B.

The upper pressing portion (also called the contact member, upper clip, or frame) 11 is the part that contacts the upper surface of the upper eyelashes when curling them.

The parallel columns 12A, 12B are integrally connected to both widthwise ends of the upper press section 11 and extend vertically. The upper ends of the inclined columns 13A, 13B are connected to the lower ends of the parallel columns 12A, 12B, forming a V-shape with a narrower gap at the bottom, and their lower ends are connected to the arm 14. The parallel columns 12A, 12B and the inclined columns 13A, 13B function as support sections.

The arm (also referred to as the first arm, handle, or shaft) 14 is an extension that connects the inclined supports 13A and 13B to the handle 16. In this example, the arm 14 extends in the same direction as the linear portion 161 (see Figure 3), which is the inner part of the handle 16.

The handle (handle, finger ring, grip, or gripping portion) 16 is ring-shaped with finger holes for inserting fingers. When a user curls their upper eyelashes themselves, the user's thumb is often inserted into the finger holes in the handle 16. Alternatively, when having a makeup artist or other professional curl their upper eyelashes, or when curling their lower eyelashes themselves, the practitioner's index finger, middle finger, or ring finger is often inserted into the finger holes in the handle 16.

In the present invention, the fixing member 10 is integrally formed with a handle 16, an arm 14 extending in the vertical direction, a pair of support columns 12A, 13A, 12B, 13B branching off from the arm 14 to support both ends of the upper press section 11, and the upper press section 11.

Also, referring to Figure 3, small holes 151A and 151B are formed in the side surfaces (side walls) on both sides that form the support hole 15 formed in the arm 14, penetrating in the width direction. Note that in this configuration, the side surfaces that define the support hole 15 are shown as being wider than the rest of the arm 14, but they may also be the same width as the rest of the arm 14.

The force application member 20 has arm portions 21, 24 and a handle 25. The distal arm 21 is formed with a distal hole (tip engagement hole) 22, which is a first engagement hole, and a fulcrum hole (fulcrum engagement hole) 23, which is a second engagement hole.

The arm sections (also called second arm sections, handle sections, or shaft sections) 21, 24 have a tip-side arm 21 that extends from the tip section beyond the connecting section, and a central arm 24 that extends in a different direction from the tip-side arm 21 and in the same direction as the straight section 251 (see Figure 3), which is the inner part of the handle 25.

The tip arm 21 of the force application member 20 is inserted into the support hole 15 of the fixed member 10 from the tip end opposite the handle 25, and is engaged by the pin shaft PS2 so that it passes through the fulcrum hole 23 and the small holes 151A and 151B on the side of the support hole 15, with the fulcrum hole 23 aligned with the small holes 151A and 151B on the side of the support hole 15.

This engagement allows the force application member 20 to rotate relative to the fixed member 10, with the pin shaft PS2 as the rotation axis. In other words, using the principle of a first class lever, the force application member 20 rotates with the handle 25 as the force point, the engagement point with the fixed member 10 as the fulcrum, and the upper end as the point of application.

When the force application member 20 is rotated relative to the fixed member 10, the arm 14 of the fixed member 10 and the arm portions 21, 24 of the force application member 20 shown in Figure 3 are within the stress generation range. The stress generation range includes the maximum stress generation point, where the stress is greatest during use. Note that the stress generation range refers to the area where relatively large stress occurs, and stress also occurs in other areas.

The handle (handle, finger ring, grip, or gripping portion) 25 is ring-shaped and has finger holes for inserting fingers. For example, when a user curls their upper eyelashes themselves, the user's index finger, middle finger, or ring finger is often inserted into the finger holes in the handle 25. Alternatively, when a practitioner curls their eyelashes or when the practitioner curls their lower eyelashes themselves, the practitioner's thumb is often inserted into the handle 25.

The force application member 20 is integrally formed with the handle 25 and the extending arms 21, 24. In the force application member 20, the arms 21, 24 are formed as a single piece and are the same thickness as the handle 25.

As described above, the distal arm 21 is provided with a fulcrum hole 23 that serves as a fulcrum and a distal hole 22 that serves as a point of application, and the central arm 24 extends at an angle relative to the distal arm 21. The central arm 24 also extends in the same direction as the linear portion 251 (see Figure 3), which is the inner portion of the handle 25. Due to the inclination of the arm portions 21, 24 of the force application member 20, the linear portion 251 of the handle 25 that extends continuously from the arm 24 becomes approximately parallel to the linear portion 161 of the handle 16 that extends continuously from the arm 14, allowing force to be applied without waste.

Also, referring to Figures 1, 2, and 3, in the fixing member 10, the handle 16 is configured to form a finger hole by a straight portion 161 that branches off from the lower end of one arm 14 in the thickness direction y (see Figure 6C) at a branching point BP1 and extends linearly from the arm 14, and a curved portion 162 that bulges out from the lower end of the straight portion 161 in the first thickness direction, folds back, and returns to the branching point BP.

In addition, in the force application member 20, the handle 25 is configured to form a finger hole by a straight portion 251 that branches off at branch point BP2 in the thickness direction from the lower end of the central arm 24 of the single arm portion 21, 24 and extends linearly from the central arm 24, which is part of the arm portion, and a curved portion 252 that bulges from the lower end of straight portion 251 in a second thickness direction opposite to the first thickness direction, then folds back and returns to branch point BP2.

In this embodiment, the finger holes formed in the handles 16 and 25 are teardrop-shaped.

The acting member (interlocking portion, lifting portion) 30 has a lower press portion 31, link portions 32A and 32B, and a connecting portion 33.

When curling the upper eyelashes, the eyelash curler 1 is held in the position shown in Figure 1, and the lower press part (lower contact member, clamping piece) 31 presses up from below against the lower surface of the eyelashes sandwiched between it and the upper press part 11, curling the upper eyelashes upward.

When curling the lower eyelashes, the eyelash curler 1 is held upside down compared to Figure 1, and the lower press part 31 presses down from above on the upper surface of the eyelashes sandwiched between it and the upper press part 11, curling the lower eyelashes downward.

The link sections (lifting columns) 32A and 32B are connected at their upper ends to the lower press section 31, incline in a roughly V-shape, and connect at their lower ends to the connecting section 33.

In addition, in this embodiment, a junction 332J is provided at the upper end of the connecting portion 33, where the link portions 32A and 32B meet before the engagement groove. The junction 332J reinforces the thinnest link portions 32A and 32B in the eyelash curler 1.

The connecting portion 33 has a three-dimensional U-shaped engaging groove at its tip. Small holes 331A and 331B are formed on both side surfaces that form the connecting portion 33, penetrating the width direction.

The tip of the tip-side arm 21 of the force application member 20 is inserted into the inside of the U-shape of the connecting portion 33 of the acting member 30, and with the tip hole 22 aligned with the small holes 331A and 331B on the side of the connecting portion 33, it is engaged by the pin shaft PS1 so that it passes through the tip hole 22 and the small holes 331A and 331B.

This engagement allows the acting member 30 to move up and down in unison when the force application member 20 rotates around the pin shaft PS1 as the rotation axis.

Furthermore, engagement hooks (engagement portions, end hooks) 311A, 311B, which are roughly circular (hook-shaped) with portions missing, are provided on both the left and right ends of the lower press section 31. The engagement hooks 311A, 311B engage with the pair of parallel support posts 12A, 12B, allowing the lower press section 31 to slide along the parallel support posts 12A, 12B of the fixing member 10.

In Figure 3, the engagement hooks 311A, 311B are shown as being open to the side (depth direction), but in this embodiment, the engagement hooks 311A, 311B may be open to the rear (second thickness direction) when viewed from the front.

The upper surface of the lower press section 31 is sandwiched between clipper rubber CR (see Figure 2), which is an elastic member. Therefore, a groove 312G for sandwiching the clipper rubber CR is formed on the upper surface of the lower press section 31.

With this configuration, when the handle 25 on one end is moved closer to the handle 16, the force application member 20 rotates around the pin axis PS2, which is the connection between the fulcrum hole 23 and the small holes 151A and 151B, as a fulcrum (fulcrum B). As a result, the tip hole 22, which connects to the connection part 33 with the acting member 30 on the other end, moves in the opposite direction to the movement of the handle 25, and the acting member 30 is pushed up together with the pin axis PS1.

As a result, by moving the handle 25, the engaging hooks 311A, 311B of the working member 30 slide along the parallel supports 12A, 12B of the fixing member 10 in response to the elevation of the tip hole 22, thereby raising and lowering the lower press section 31.

The force application member 20 also rotates around a part of the fixed member 10 as a fulcrum, thereby moving the acting member 30 up and down.

The lower press portion 31 of the working member 30 approaches the upper press portion 11 of the fixing member 10, and pressure is applied (clamped) to the eyelashes between the clipper rubber CR and the upper press portion 11, thereby giving the eyelashes a curl.

Figure 4A is a front view of the eyelash curler 1 of the first embodiment, and Figure 4B is a rear view of the eyelash curler 1 of the first embodiment.

Referring to Figures 4A and 4B, when the direction perpendicular to the direction in which the force application member 20 rotates is defined as the depth direction, in the fixed member 10, the width (x1) in the depth direction of at least a portion of the arm (first arm portion) 14 and the first handle 16 are equal. Furthermore, in the force application member 20, the width (x1) in the depth direction of the central arm 24, which is at least a portion of the second arm portions 21, 24, and the second handle 25 are equal.

Referring to Figures 1 to 4B, the straight portion 161 and curved portion 162 of the first handle 16 and the straight portion 251 and curved portion 252 of the second handle 25 overlap in the depth direction.

Here, "equal widths" and "overlapping" do not only mean completely equal or completely overlapping, but also include a certain degree of error and partial overlap. For example, the straight sections 251, 161 and the curved sections 252, 162 may have different widths, in which case the thicker section will partially overlap the thinner section in the depth direction.

Also, referring to Figures 1 to 4B, in this embodiment, the arm 14 extends as a single piece from the branching point to the handle 16, and the width (depth) and height (thickness) of the handle 16 are the same as the width and thickness of the arm 14 in the depth direction.

With this configuration, when using the device, the pinching force from the fingers is applied directly from the handles 16, 25, which are the same thickness and overlap in the depth direction, via the arms 14, 21, 24, which are the same width and extend in the same direction, making it easier to transmit the force that pinches the eyelashes.

In the eyelash curler 1, the fixing member 10, force application member 20, and action member 30 are each integrally constructed from resin, and details of the constituent resins will be described later.

In this embodiment, the connecting portion between the force application member 20 and the acting member 30 and the connecting portion between the fixed member 10 and the force application member 20 are rotatably fixed by pin shafts (PS1, PS2) that serve as connecting shafts for connecting the respective members. However, the pin shafts PS1, PS1 may be made of any material, such as resin or metal.

Furthermore, if the pin shafts PS1 and PS2 are made of resin, all of the components that make up the eyelash curler 1 will be made of resin, making it completely metal-free.

<Comparative Example>
5A and 5B are diagrams of a comparative example of a metallic eyelash curler. The eyelash curler 9 shown in Fig. 5A and Fig. 5B is an example of a common metallic eyelash curler. Fig. 5A is a front perspective view of the comparative example of the metallic eyelash curler 9, and Fig. 5B is a rear perspective view of the comparative example of the metallic eyelash curler 9.

The structural differences between the metal eyelash curler 9 and the eyelash curler 1 of the present invention shown in Figure 1 are explained below.

In the metal eyelash curler 9 shown in Figures 5A and 5B, the fixing member 70 is made by forming the upper press part (metal frame) 11 and a thin metal rod separately and then bonding them together. The force application member 80 is formed by deforming a single thin metal rod. The acting member 90 is made by forming the lower press part (metal frame) 91 and a thin metal rod separately and then bonding them together.

In more detail, the fixing member 70 is made by processing a metal rod and twisting it into a ring shape at the bottom to form the handle 76. Long vertical slits are formed in the opposing upper ends of the metal rod, which correspond to the parallel struts 72A and 72B. The lower end is twisted into a ring shape, and the arm 74, which extends from the struts 72A, 73A, 72B, and 73B to just before the handle 76, has two thin metal rods (741 and 742) arranged side by side in contact or close proximity. A metal frame is then inserted into the slits on the inner surfaces of the tips of the parallel struts 72A and 72B, which are metal rods, and welded to connect the upper press section 71 and the parallel struts 72A and 72B.

The force application member 80 is twisted into a ring shape at its lower end to form a handle 85, and the arm sections 81 and 84, which extend from the handle 85 to the tip, consist of two thin metal rods (811, 812) and (841, 842) that are aligned and in contact with each other.

In the working member 90, the ends of a metal rod made by bending a single piece of metal into a roughly V-shape are welded to the lower press part 91, which is a metal frame, thereby connecting the link parts 92A and 92B to the lower press part 91.

In addition, when the apex of the approximately V-shape of the link portions 92A, 92B of the acting member 90 is connected to the force application member 80, a thin metal rod is inserted into the tip engagement hole 82 of the force application member 80 and bent to form the shape of the link portions 92A, 92B, and the upper ends of the link portions 92A, 92B are welded to the lower press portion 91. In this way, the forming of the acting member 90 and the connection between the acting member 90 and the force application member 80 are performed simultaneously, so the acting member 90 and the force application member 80 cannot be detached after manufacture.

In this configuration, the handles 76, 85 that form the ring on the fixing member 70 and the force application member 80 are as thin as one arm compared to the two combined arms 74, (81, 84). As a result, the cross section of the handles 76, 85 is cylindrical and therefore difficult to hold.

In contrast, the eyelash curler 1 of the present invention is made of resin, so the arms 14 (21, 24) of the fixing member 10 and the force application member 20 are made of a single piece and are the same thickness as the handles 16, 25.

In this way, with the configuration of the present invention, by making the cross-sectional shape of the handles 16, 25 of the fixing member 10 and the force application member 20 the same thickness as the arm portions 14, 21, 24, the handles 16, 25 can be made thicker, improving holdability and preventing the handles from digging into the fingers or causing pain when force is applied, allowing sufficient force to be applied.

Furthermore, with reference to Figures 3, 4A, and 4B, in the eyelash curler 1 of the present invention, the straight portion 161 and curved portion 162 of the first handle 16 and the straight portion 251 and curved portion 252 of the second handle 25 overlap in the depth direction.

For this reason, handles that overlap in the depth direction are easier to operate and apply force to the eyelashes more easily than handles that are twisted with straight and curved sections, such as the metal configuration shown in Figures 5A and 5B, because force is applied in a straight line.

In addition, in the metal eyelash curler 9, the arm 74 of the fixed member 70 is composed of two metal rods 741, 742, and the arm 81 of the force application member 80 is clamped from the side at the clamping portion 75 just below where the spacing between these rods widens to form inclined supports 73A, 73B, and the arm 81 is engaged with the clamping portion 75 by passing a pin 83 through it. As a result, the upper side of the fulcrum where the arm 81 is clamped by the clamping portion 75 is exposed. When using this configuration and the force application member 80 is rotated relative to the fixed member 70 during the eyelash curling operation, there is a risk that hair, tissue, cotton, etc. may become caught in the fulcrum where the arm 81 is clamped by the clamping portion 75.

In contrast, in the present invention, the fixing member 10 has a junction 141J at the upper end of the arm 21 above the support hole 15 through which the force application member 20 is inserted, so the upper side of the fulcrum of the force application member 20 that rotates relative to the fixing member 10 is not exposed. Therefore, even if hair or other objects are present nearby, they are less likely to become caught in the engagement portion between the force application member 20 and the fixing member 10.

<Configuration approximation>
Since the shape of an eyelash curler is complex, the shape was calculated by replacing it with a simpler shape.

Figures 6A, 6B, and 6C are diagrams that explain, in an approximate manner, how forces are applied to an eyelash curler. Figure 6A is a diagram showing the positions of the fulcrums and load points on the eyelash curler, and Figure 6B is a diagram that approximates the fulcrums and load points of Figure 6A by pushing them outward to form a simple beam (load concentrated on one side). Figure 6C is a cross-sectional view of the beam portion of the fixing member and force application member, and corresponds to cross section D in Figure 6A.

The moment the eyelashes are clamped, the rotation of the force application member 20, which is the rotating part of the eyelash curler, is restricted and can be considered to barely rotate or move, so the connecting part of the eyelash curler shown in Figure 6A can be replaced with fulcrums A and B in Figure 6B.

Load point C is the handle 25 of the force application member 20, and load P is the force (grip force) applied to the eyelash curler by the fingers.

Here, the fixed member 10 and the force application member 20 function as the "beam" of a spring-loaded simple beam, and when considering loads and actions, the width (depth) (x) and height (thickness) (y) of the cross section of the beam consisting of the fixed member 10 and the force application member 20, which are the parts that receive the force, are taken into account, as shown in Figure 6C.

In the following description, as shown in Figure 6A, the direction in which the force application member 20 rotates is referred to as the rotation direction, and the direction perpendicular to the rotation direction is referred to as the depth direction. Also, as shown in Figure 6C, the direction perpendicular to the depth direction in the cross section of the fixing member 10 and the force application member 20 is referred to as the thickness direction.

As shown in Figure 6C, the cross sections of the arm 14 and handle 16 of the fixing member 10 and the arm portions 21, 24 and handle 25 of the force application member 20, to which force is directly applied, are preferably rectangular or rounded rectangular in shape in order to increase the cross-sectional area and obtain greater strength without changing the thickness of the circular metal. However, the configuration of the beam with a rectangular cross section shown in Figure 6C is only one example, and the cross-sectional shapes of the beams of the fixing member 10 and the force application member 20 are not limited to the rectangle shown in Figure 6C, and may be other shapes such as circular, elliptical, or semicircular, taking into account factors such as formability and tactile feel.

Furthermore, in the "simple spring beam (concentrated load on one side)" structure shown in Figure 6B, the bending moment MB generated around support point B is at its maximum.

The inventors therefore conducted a simulation of an existing metal eyelash curler to evaluate the application of an external force (load P) to the object, an eyelash curler, and selected a resin. The results are shown in Figure 8A, which will be described later.

Figures 7A and 7B are diagrams showing the dimensional ratios of the force application members. In more detail, Figure 7A is a diagram showing an example configuration of the eyelash curler 1 of the present invention that takes into account the force ratios and movable angles of the force application members, and Figure 7B is a diagram showing an example configuration of the eyelash curler that takes into account the force ratios of the force application members.

When applying the above-mentioned "simple spring beam (one-sided concentrated load)" structure to an eyelash curler, the following points are generally known about the force application members.

The eyelash curler 1 performs a curling action by rotating the force application member 20 and applying force to the action member 30 using the handle 25 as the force point, based on the principle of a first class lever. Therefore, eyelash curling can be achieved with less force if the distance between the force point and the action point is greater than the distance between the fulcrum and the action point. For this reason, it is well known to design the curler so that distance a is smaller than distance b, as shown in Figures 7A and 7B.

In addition, the dimensions of the distance a from the fulcrum B to the tip side of the force application member 20 and the distance b from the fulcrum B to the handle side are preferably a:b = 1:3 or greater, taking into consideration the influence on the clamping pressure (pressure that clamps the eyelashes) using the principle of leverage. In other words, the distance from the fulcrum to the bottom end of the force application member 20 is set to be at least three times the distance from the top end to the fulcrum. In this embodiment, the distance from the fulcrum hole 23, which is the fulcrum that engages with the fixed member 10 via the pin shaft PS2, to the bottom end of the force application member 20 is set to be at least three times the distance from the tip hole 22, which engages with the acting member 30 via the pin shaft PS1, to the fulcrum hole 23.

However, while a smaller size is desirable for portability, simply setting the ratio can result in a configuration in which the force application member and fixed member are short, as shown in Figure 7B. In a configuration in which the force application member 20 is short like this, both the force point and the point of action are close to the fulcrum B, so a fairly large force must be applied to the handle, and the movable angle at the fulcrum B must be set large.

In this specification, therefore, when ensuring a movement distance of 4 mm or more for the lower press part 31, it is preferable that a = 10 mm or more, taking into consideration the movable angle and how force is applied, as a value that takes into consideration the balance between the feel when pressing the straight part 251 (see Figure 6A) of the handle 25, which is the force point (load point), from the finger hole side and the clamping pressure required to curl the tool. In other words, in the first embodiment, it is preferable that the distance from the tip hole 22 at the upper end of the force application member 20, which is the distance from the upper end to fulcrum B, to the fulcrum hole 23 at the position of fulcrum B, be set to 10 mm or more.

<Material selection>
FIG. 8A shows the evaluation results when an eyelash curler was formed using a variety of materials, and FIG. 8B shows the feasible range based on Young's modulus and section modulus.

In more detail, Figure 8A shows the evaluation results when eyelash curlers with dimensions satisfying Figure 7A were formed and used using materials with specified cross-sectional areas and section moduli: SUS304 (stainless steel), nylon 6/10, polyamide (PA), fiber-reinforced resin made by adding 55% glass fiber (GF) to PA, polyether ether ketone (PEEK), polybutylene terephthalate (PBT), GF polyamide MXD6, and CF polyamide MXD6.

For the fiber-reinforced resin "PA + GF 55%," strength evaluation was performed by changing the cross-sectional area to change the section modulus. Increasing the cross-sectional area increases the section modulus, which shifts the position on the graph in Figure 8B upward, and the evaluation may improve even for the same material. For example, when the "PA + GF 55%" material had a section modulus of 4.5 ( ^mm3 ), the strength was not met and the overall evaluation was "×." However, when the section modulus was 15.05 ( ^mm3 ) and when the section modulus was 36 ( ^mm3 ), the strength was met and the overall evaluation was "Good."

Furthermore, even when the cross-sectional area of PBT was increased to the same extent as "PA+GF55%" (section modulus = 32 (mm ³ )), the strength evaluation was not met and the overall rating was not "good".

In Figure 8B, the boxed area is the recommended range determined by simulation, which is a material with a Young's modulus of 2500 to 40000 (N/mm ² ) and a section modulus of 5 to 40 (mm ³ ).

Within this range, the greater the Young's modulus of the resin, the smaller the section modulus can be. In other words, the greater the Young's modulus of the resin, the stronger the strength can be maintained even when the resin is made thinner, approaching that of a metal one. Considering the ease of use for the user, the section modulus is preferably 30 ( ^mm3 ) or less, and more preferably 20 ( ^mm3 ) or less.

Conversely, even if the resin has a small Young's modulus and is weak, simulations have shown that if the section modulus is increased, it may be possible to meet the strength requirement. However, in consideration of operability, the upper limit of the section modulus was set to 40 (mm ³ ) so as not to make the cross-sectional area too large.

Therefore, in order to increase the strength of materials containing resin without increasing the cross-sectional area, it is preferable to form the material that makes up the eyelash curler from a fiber-reinforced resin that is made by blending glass fiber (GF) into the resin. For example, adding glass fiber to a resin with the same section modulus increases the Young's modulus, and the position on the graph in Figure 8B shifts to the right.

Furthermore, in addition to or instead of glass fiber, CF (carbon fiber) may be mixed. For example, in a fiber-reinforced resin, it is preferable to mix glass fiber (GF) or carbon fiber (CF) in an amount of 30% by mass or more and 65% by mass or less.

The addition of GF or CF strengthens the rigidity of the resin material itself (e.g., PA) against deformation and breakage. For example, the typical Young's modulus of PA is 1200-2900 MPa, but adding glass fiber can increase the Young's modulus (to 4725 MPa, for example). Furthermore, this addition reduces the stress generated in structural analysis calculations to around 30% of the tensile strength, which indicates the resin material's (e.g., PA) resistance to deformation and breakage. Therefore, eyelash curlers made from reinforced resin can approach the pressure exerted on the eyelashes by metal eyelash curlers.

There are no particular restrictions on the resin that can be mixed with the glass fiber, as long as it is a resin that can be blended with fiber. Examples of resins include polyamide (PA) (including various nylons), polyether ether ketone (PEEK), polyethylene terephthalate (PETG), glycol-modified PET (PETG), polyphenylene sulfide (PPS), and polyamide MXD6.

Here, polyamide MXD6 is a crystalline thermoplastic polymer obtained from metaxylylenediamine (MXDA) and adipic acid. The GF polyamide MXD6 used here was the commercially available Reny (registered trademark) 1022H, which is a polyamide MXD6 blended with 50% glass fiber (GF). The CF polyamide MXD6 used was the commercially available Reny C408, which is a polyamide MXD6 blended with 40% carbon fiber (CF).

Furthermore, if the resin itself has high strength, such as the special polyamide MXD6 alone, and has a Young's modulus of 5000 (N/mm ² ) or more without being reinforced with glass fiber or carbon, and the strength can be compensated for by simulation, any thickness within the range of section modulus 5 to 40 (mm ³ ) can be used as the material for the eyelash curler of the present invention.

Furthermore, even if the resin does not need to be a special one, as long as the resin has a Young's modulus of 2500 (N/mm ² ) or higher, it is possible to form an eyelash curler from nylon 6/10, PEEK, PET, PETG, PPS, etc. by setting the section modulus high within the recommended range above, without mixing in glass fiber. In this case, since these resins other than nylon 6/10 are expected to have a Young's modulus of around 2500 (N/mm ² ) to 5000 (N/mm ² ) by themselves, if the section modulus during molding is set slightly below the lower end of the recommended range, for example to 10 (mm ³ ) or higher, the resin alone will be able to achieve the desired strength, and can be used as the material for the eyelash curler of the present invention.

Here, it is preferable that the arm portions 14, 21, 24, which are the stress generating range of the fixing member 10 and the force application member 20 where the force of the user's fingers is directly applied, satisfy the above-mentioned recommended ranges of Young's modulus of 2500 N/mm ³ to 40000 N/mm ³ and section modulus of 5 mm ³ to 40 mm ³ .

In addition, as long as the material of the link portions 32A and 32B of the acting member 30, which are indirectly subjected to force and perform lifting and lowering movements, satisfies the Young's modulus within the recommended range above, the section modulus that defines the thickness may be smaller than the recommended range.

<Partial eyelash curler>
In the above embodiment, the explanation was based on the premise of a full-area eyelash curler that covers nearly the entire width of the eye and pinches the entire eyelashes, but the eyelash curler of the present invention having the above-mentioned material and cross-sectional shape may also be a partial-area eyelash curler.

Figure 9 is a diagram showing the configuration of a partial eyelash curler that is a modified version of the first embodiment of the present invention.

As shown in Figure 9, the partial eyelash curler 2 has a similar configuration to the first embodiment described above, with the upper pressing portion 11P and lower pressing portion 31P that hold the eyelashes having a shorter depth width. Therefore, the spacing between the support portions 12C, 13C, 12D, and 13D of the fixing member 10P and the spacing between the link portions 32C and 32D of the acting member 30P are also narrower than in the first embodiment.

The force required to partially curl eyelashes by sandwiching them between the narrow upper pressing portion 11P and the narrow lower pressing portion 31P is less than the force required to curl eyelashes across the entire width of the eye.

For this reason, as shown in Figure 9, the width of the handles 16 and 25 is set narrow when no force is being applied, so that the range of rotation of the force application member 20P is narrow.

In this configuration, by using a resin whose Young's modulus and section modulus are within the recommended ranges shown in Figure 8B, strength is ensured and eyelashes can be curled using the same operation as with metal eyelashes without being larger than a typical metal shape.

Furthermore, because the partial eyelash curler 2 shown in Figure 9 requires less force than the full-area type, the section modulus that determines the thickness may be smaller than the recommended range, as long as the material's Young's modulus falls within the recommended range.

Furthermore, in this configuration, the fixing member 10P has a junction 141J at the upper end of the upper arm of the engagement portion where it joins with the inclined supports 13C and 13D, so even if hair or other objects are present, they can be prevented from getting caught in the engagement portion between the force application member and the fixing member.

Furthermore, in this configuration, the straight and curved portions of the handles 16, 25 overlap in the depth direction, so force is applied in a straight line, making it easier to operate and more likely to apply force to the eyelashes.

Second Embodiment
Fig. 10 is an overall perspective view of an eyelash curler 3 according to a second embodiment of the present invention. Fig. 11 is an overall perspective view of the eyelash curler 3 according to the second embodiment as viewed from an angle different from that shown in Fig. 10. Fig. 12 is an exploded view of the eyelash curler 3 according to the second embodiment.

In this embodiment, the materials, etc. are the same as the resin used in the first embodiment, but the hinge configuration of the engagement (fulcrum) between the fixed member and the force application member, and the engagement (point of application) between the force application member and the action member are different.

As shown in Figure 12, in this embodiment, the force application member 50 has a fitting groove 53 formed in a portion slightly away from the tip, which is a recessed fitting groove (depression) below the hinge.

As shown in Figure 12, the fixed member 40 has a support hole 45 formed in the arm 44, which is provided with a fulcrum shaft 48 for engagement that extends in the width direction (depth direction).

Then, with the tip arm 51 of the force application member 50 inserted from the upper end into the support hole 45 of the fixed member 40, the force application member 50 is pushed downward into the fixed member 40, and the fitting groove 53 engages with the fulcrum shaft 48 inside the support hole 45, connecting the force application member 50 and the fixed member 40.

The fulcrum shaft 48 of the fixed member 40, which is fitted into the fitting groove 53 of the force application member 50, serves as a second fulcrum (fulcrum B in Figure 6A), thereby connecting the force application member 50 to the fixed member 40 in a freely rotatable manner.

Note that while Figure 12 shows an example in which the fulcrum shaft 48 extends across the entire width of the support hole 45, the fulcrum shaft 48 that can fit into the fitting groove 53 may also have a double-sided protrusion shape that protrudes from the inner surface of the support hole 45 and is interrupted in the center.

The arm 44 also exists above the support hole 45, and above the support hole 45 there is a junction 441J where it joins with the inclined supports 43A and 43B. Therefore, the fulcrum is not exposed, and even if hair, tissue, cotton, etc. are present nearby, it is possible to prevent them from becoming caught in the engagement portion between the force application member 50 and the fixing member 40.

The acting member 60 also has a lower press portion 61 and link portions 62A and 62B, one end of which is connected to the lower press portion 61.

Furthermore, engagement hooks (engagement portions) 611A, 611B, which are generally circular (hook-shaped) with a portion missing, are provided on both the left and right ends of the lower press portion 61. In this embodiment, the engagement hooks 611A, 611B are open at the rear to facilitate attachment and detachment of the acting member 60 to the fixed member 40 during assembly. When the engagement hooks (rear hooks) 611A, 611B engage with the pair of parallel supports 42A, 42B, the acting member 60 can slide along the parallel supports 42A, 42B of the fixed member 40.

In this configuration, the other ends of the link portions 62A and 62B are bent into a U-shape and formed integrally, and the portion connecting the other ends of the link portions 62A and 62B at the other ends is a cylindrical fitting tube 63. The fitting tube 63 is the engagement portion of the operating member 60.

A recessed mating hook 52 is formed at the tip of the force application member 50.

Then, by pushing the force application member 50 upward against the action member 60, the engaging hook 52 engages with the engaging tube 63, connecting the force application member 50 and the action member 60. In this way, the engaging hook 52 of the force application member 50 engages with the engaging tube 63 of the action member 60, allowing the action member 60 to move in conjunction with the point of action of the force application member 50.

In this way, by using a hook shape to connect the fixing member 40 and the force application member 50 (second fulcrum B in Figure 6A), and to connect the force application member 50 and the acting member 60 (first fulcrum A in Figure 6A), attachment and detachment can be performed without using a shaft that passes through the components for connection.

As a result, the engagement between the components can be completely metal-free without using the metal pin shafts PS1 and PS2 used to connect the components in the first embodiment.

In addition, the engagement can be released by applying force in the direction that the hooks come out, allowing the user to disassemble and reassemble the product by hand. For example, if the eyelash curler 3 becomes dirty, it can be disassembled and cleaned, so even the small irregularities in the engagement area can be cleaned, and it can then be reassembled, keeping everything clean down to the smallest details.

In addition, even if a sudden load is applied inside a cosmetic pouch or other luggage, the hooks will disengage, preventing damage. Because the engagement directions at first fulcrum A (see Figure 6A) and second fulcrum B are opposite, if a strong force is applied in one direction, only one of first fulcrum A and second fulcrum B will disengage. Therefore, if the engagement is suddenly released, it can be easily restored.

In addition, a recessed upper mating hook 52 is provided at the tip of the tip-side arm 51 of the force application member 50, and a recessed lower mating groove 53 is formed in a portion of the tip-side arm 51 closer to the tip than the handle 55, and the arm portions (second arm portions) 51, 54 extend as a single line from the tip to the handle 55.

As a result, in the eyelash curler 3 of this embodiment, like the first embodiment, unlike a metal curler, the handles 46, 55 can be made as thick as the extensions (arms 44, 51, 54), providing better hold than a metal curler.

To satisfy the ratio in Figure 6A, in this embodiment, the distance from the engagement groove 53, which is the fulcrum that engages with the fixed member 40, to the lower end of the force application member 50 is set to at least three times the distance from the engagement hook 52, which engages with the acting member 60 at the upper end, to the engagement groove 53.

In addition, with this specification, the distance from the upper end of the mating hook 52 to the mating groove 53, which serves as the fulcrum, is set to 10 mm or more to ensure that the lower press section 31 can move at least 4 mm.

Referring to Figure 12, the central arm 54 of the force application member 50 has a wavy, uneven surface formed on the leading surface in the rotational direction, which is closer to the handle 55 than the fitting groove 53.

These wavy, uneven shapes 541, 542 improve the fit. In particular, when applying makeup yourself, you place your thumb in the finger hole of the handle 46 on the fixing member 40 side, and your other fingers in the finger holes of the handle 55 on the force application member 50 side. When the middle finger, which is most likely to exert force, is placed in the finger hole of the handle 55, or when the ring finger is placed in the finger hole, the wavy, uneven shapes 541, 542 allow the index finger and middle finger to support the force application member 50, resulting in stable movement.

Furthermore, a finger rest 56 is provided at the rear end of the handle 55. For example, when a user curls their own eyelashes, they can insert their middle finger into the finger hole of the handle 55 on the force application member 50 side and their ring finger into the finger rest 56, or they can insert their index finger into the finger hole of the handle 55 on the force application member 50 side and their middle finger into the finger rest 56, or they can insert their ring finger into the finger hole of the handle 55 on the force application member 50 side and their little finger into the finger rest 56.

No matter which finger is inserted, the force application member 50 is supported by the wavy uneven shapes 541, 542 and the finger hook 56 with fingers other than the one inserted in the finger hole of the handle 55. This allows the load on each finger when pushing to be shared when curling the eyelashes, and ensures stable operation.

In addition, hit points 47 and 57 are provided at the portions that face each other when the handle 46 of the fixing member 40 and the handle 55 of the force application member 50 are closed.

When pressing the eyelashes, the tips of the hit points 47, 57 of the handles 46, 55 come into contact with each other, preventing excessive rotation of the force application member 50 relative to the fixed member 40.

Note that because rotation is restricted by providing hit points 47, 57 on the inner edges of the handles 46, 55, there is a risk that, for example, if the clipper rubber (not shown) becomes crushed and thinned due to repeated use, the clamping pressure of the press unit may not be sufficient when pressed down. For this reason, when installing hit points 47, 57, it is advisable to set the length, etc., taking into account the possibility of the clipper rubber being crushed.

Figures 13A and 13B are front and rear views of the eyelash curler 3 of the second embodiment.

Referring to Figures 13A and 13B, when the direction perpendicular to the direction in which the force application member 50 rotates is defined as the depth direction, the width (x2) in the depth direction of at least a portion of the arm (first arm portion) 44 and the handle 46 of the fixed member 40 is equal. It can also be seen that the width (x2) in the depth direction of at least a portion of the second arm portions 51, 54 and the handle 55 of the force application member 50 is equal.

In this embodiment, since the wavy uneven shapes 541, 542 and hit points 47, 57 are provided, the thickness (height) and width of the beams of the arm portions 44, 51, 54 and handles 46, 55 in the rotational direction are not uniform.

However, even in this embodiment, the center line CL of the arms 44, 51, and 54 in the depth direction (width x2 direction) extends in the same direction as and overlaps with the center line CL of the handles 46, 55. Therefore, during operation, the pinching force from the fingers is applied directly from the handles 46, 55 via the arms 44, 51, and 54, which extend on the same center line, making it easier to transmit the pinching force to the eyelashes.

Also, referring to Figures 10, 11, and 12, in the fixing member 40, the handle 46 is configured to form a finger hole by a straight portion 461 that branches off from the lower end of one arm 44 in the thickness direction at branch point BP1 and extends linearly from the arm 44, and a curved portion 462 that bulges out in the first thickness direction from the lower end of straight portion 461, folds back, and returns to branch point BP1.

Furthermore, in the force application member 50, the handle 55 is configured to form a finger hole by a straight portion 551 that branches off from the lower end of one of the arms 51, 54 in the thickness direction at a branching point and extends linearly from the central arm 54, which is part of the arms 51, 54, and a curved portion 552 that bulges from the lower end of the straight portion 551 in a second thickness direction opposite to the first thickness direction, then folds back and returns to the branching point.

In this embodiment, the finger holes formed in the handles 46, 55 are approximately semicircular.

With reference to Figures 10 to 13B, the straight portion 461 and curved portion 462 of the handle 46 of the fixing member 40 and the straight portion 551 and curved portion 552 of the handle 55 of the force application member 50 overlap in the depth direction.

Furthermore, in this configuration, the straight and curved portions of the handles 46, 55 overlap in the depth direction, so force is applied in a straight line, making it easier to operate and more likely to apply force to the eyelashes.

In this embodiment, too, by using a resin that falls within the feasible range defined by the section modulus and Young's modulus shown in Figure 8B, it is possible to achieve the same stress as metal with the same flexibility and clamping pressure. As a result, while improving the grip of the handle, it is possible to ensure strength without increasing the size compared to metal, and achieve the same eyelash curling effect as metal with the same operation as metal.

In the second embodiment, an example was used in which wavy uneven shapes 541, 542 and hit points 47, 57 were provided in a configuration in which the action point (fulcrum A) and fulcrum (fulcrum B) engage using hooks and grooves between the components, but the wavy shapes and hit points may also be applied to the first embodiment in which engagement is achieved by a pin shaft.

Alternatively, in the configuration of the second embodiment, in which components are engaged using hooks and grooves, the wavy uneven shapes 541, 542 and hit points 47, 57 do not need to be provided.

Furthermore, in a configuration in which the points of application and fulcrums are engaged using hooks and grooves between the components, the beams of the arm portions 14, 21, 24 and the handles 16, 25 may be configured to be equal in thickness as well as width, as in the first embodiment.

In addition, the first embodiment describes a handle with a roughly teardrop-shaped finger hole, and the second embodiment describes a handle with a roughly semicircular finger hole, but the finger hole shape may be the opposite, or may be circular, oval, or other shapes. Furthermore, the handle may have a shape in which the area around the branching point of the curved portion is interrupted.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to this specific embodiment, and various modifications and variations are possible within the scope of the gist of the embodiment of the present invention as set forth in the claims.

This application claims priority based on Japanese Patent Application No. 2018-174220, filed with the Japan Patent Office on September 18, 2018, the entire contents of which are incorporated herein by reference.

1, 3 Eyelash curler 2 Partial eyelash curler 10 Fixing member 11 Upper press part 12A, 12B Parallel support (support part)
13A, 13B Slanted support (support part)
14 Arm (first arm portion)
141J Confluence portion 15 Support hole portion 151A, 151B Small holes 16 Handle 20 Force application member 21 Tip side arm (arm portion, second arm portion)
22 Tip hole (tip engagement hole)
23 Fulcrum hole 24 Central arm (arm portion, second arm portion)
25 Handle 30 Working member 31 Lower press portion (contact member, upper clamping piece)
311A, 311B Engagement hook (engagement portion, hooks on both ends)
32A, 32B Link portion 33 Connecting portion 331A, 331A Small hole 400 Fixing member 41 Upper press portion 42A, 42B Parallel support (support portion)
43A, 43B Slanted support (support part)
44 Arm (first arm portion)
441J Confluence portion 45 Support hole portion 46 Handle 47 Hit point 48 Fulcrum axis 50 Force application member 51 Tip side arm (arm portion, second arm portion)
52 Fitting hook (connecting part)
53 Fitting groove (fitting portion, connecting portion)
54 Central arm (arm portion, second arm portion)
541, 542 Wavy uneven shape 55 Handle 56 Finger hook 57 Hit point 60 Action member 61 Lower press part (contact member, upper clamping piece)
611A, 611B Engagement hook (engagement portion, rear hook)
62A, 62B Link portion 63 Connection portion A First fulcrum B Second fulcrum C Load point PS1 Pin shaft PS2 Pin shaft

Claims (13)

a fixing member integrally formed with the upper press portion;
An operating member that allows the lower press unit to move up and down relative to the upper press unit;
a force application member that moves the acting member up and down by rotating around a portion that engages with the fixed member as a fulcrum,
the fixing member, the acting member, and the force application member are each integrally formed from resin,
The fixing member is integrally formed with the upper press section, a first handle on which a user places their fingers, a first arm section extending in the vertical direction, a hole frame section located above the first arm section and having a support hole section formed therein, and a pair of support posts that branch into two from a joining section at the upper end of the hole frame section and support both ends of the upper press section;
the force application member is integrally formed with a second handle on which the user places his/her fingers, an extending second arm portion, and a tip portion that is positioned above the second arm portion and is inserted into the hole frame portion,
When a direction perpendicular to the direction in which the force application member rotates is defined as a depth direction, and a direction perpendicular to the depth direction in a cross section of the fixing member and the force application member is defined as a thickness direction,
In the fixing member, the first handle is ring-shaped, branching from a lower end of the first arm portion toward one side in the thickness direction, expanding, and folding back to form a finger hole;
In the force application member, the second handle is ring-shaped, branching from a lower end of the second arm portion toward the other side in the thickness direction, bulging out, and folding back to form a finger hole;
the tip end of the force application member is narrower in width in the depth direction than the second handle and the second arm portion,
the first arm portion, the first handle, the second arm portion, and the second handle have the same width in the depth direction and the same thickness in the thickness direction;
the first arm portion of the fixing member is composed of one piece, and the second arm portion of the force application member is composed of one piece,
The eyelash curler, wherein the first arm portion of the fixing member is longer in the up-down direction than the support hole portion. When a direction perpendicular to the depth direction in a cross section of the fixing member and the force application member is defined as a thickness direction,
In the fixing member, the first handle is formed of a ring including a straight portion that branches off from a lower end of one of the first arms in a thickness direction at a branching point and extends linearly from the first arm, and a curved portion that bulges out from the lower end of the straight portion to one side in the thickness direction, folds back, and returns to the branching point;
In the force application member, the second handle is formed by a ring including a straight portion that branches off at a branch point in the thickness direction from a lower end of one of the second arms and extends linearly from the second arm, and a curved portion that bulges out from the lower end of the straight portion to the other side in the thickness direction, bends back, and returns to the branch point,
The eyelash curler according to claim 1 , wherein the straight portion and the curved portion of the first handle and the straight portion and the curved portion of the second handle overlap in the depth direction. a fulcrum hole is formed in a portion of the force application member that serves as the fulcrum, the fulcrum hole penetrating in a depth direction perpendicular to a direction in which the force application member rotates,
Small holes are formed on both side walls of the support hole portion of the fixing member,
3. The eyelash curler according to claim 1 or 2, wherein the tip end portion of the force application member is inserted from the upper end into the support hole portion of the fixing member, and is engaged by a pin shaft so as to pass through the fulcrum hole and the small holes in the both side walls, and the pin shaft serves as a fulcrum for rotation of the fixing member. the acting member is integrally formed with the lower press portion, a link portion whose upper end is connected to the lower press portion, and a connecting portion whose lower end is connected to the link portion,
a tip hole penetrating in a depth direction perpendicular to a direction in which the force application member rotates is formed at an upper end of the tip portion of the force application member, the connecting portion being recessed in a U-shape toward a lower end, and small holes being formed on both side surfaces of the recess;
4. The eyelash curler according to claim 1, wherein an upper end of the tip portion of the force application member is inserted into the inside of the recess of the connecting portion and engaged with a pin shaft so as to pass through the tip hole and the small holes on both side surfaces of the connecting portion, thereby connecting the acting member to the force application member so as to be movable in conjunction with the force application member. In the action member, both left and right ends of the lower press part are hooks having a hook shape with both ends open in the depth direction,
The eyelash curler according to claim 4 , wherein the end hooks are fitted to the pair of support posts, thereby allowing the operating member to slide relative to the fixing member. a fixing member integrally formed with the upper press portion;
An operating member that allows the lower press unit to move up and down relative to the upper press unit;
a force application member that moves the acting member up and down by rotating around a portion that engages with the fixed member as a fulcrum,
the fixing member, the acting member, and the force application member are each integrally formed from resin,
The fixing member is integrally formed with the upper press section, a first handle on which a user places their fingers, a first arm section extending in the vertical direction, a hole frame section located above the first arm section and having a support hole section formed therein, and a pair of support posts that branch into two from a joining section at the upper end of the hole frame section and support both ends of the upper press section;
the force application member is integrally formed with a second handle on which the user places his/her fingers, an extending second arm portion, and a tip portion that is positioned above the second arm portion and is inserted into the hole frame portion,
When a direction perpendicular to the direction in which the force application member rotates is defined as a depth direction, and a direction perpendicular to the depth direction in a cross section of the fixing member and the force application member is defined as a thickness direction,
In the fixing member, the first handle is ring-shaped, branching from a lower end of the first arm portion toward one side in the thickness direction, expanding, and folding back to form a finger hole;
In the force application member, the second handle is ring-shaped, branching from a lower end of the second arm portion toward the other side in the thickness direction, bulging out, and folding back to form a finger hole;
The upper surface of the second arm portion is formed with a wavy uneven shape,
the tip end of the force application member is narrower in width in the depth direction than the second handle and the second arm portion,
the first arm portion, the first handle, the second arm portion, and the second handle have the same width in the depth direction;
the first arm portion of the fixing member is composed of one piece, and the second arm portion of the force application member is composed of one piece,
The eyelash curler, wherein the first arm portion of the fixing member is longer in the up-down direction than the support hole portion. a recess for fitting, the recess being recessed downward, is formed at the tip end of the force application member;
The fixing member has a fitting protrusion provided inside the support hole,
7. The eyelash curler according to claim 1, wherein the force application member is rotatably connected to the fixed member, with the force application member serving as a fulcrum at a fitting portion where the fitting recess of the force application member and the fitting protrusion of the fixed member fit together, thereby transmitting a force due to rotation to the acting member so as to act in an upward direction. The action member is integrally formed with the lower press portion and a link portion whose one end is connected to the lower press portion,
a fitting hook having an upper recess is formed at the upper end of the tip of the force application member,
a fitting cylinder is provided at the other end of the link portion of the acting member;
The eyelash curler according to claim 7 , wherein the fitting hooks of the force application member and the fitting tubes of the action member are fitted together, thereby connecting the action member and the force application member so that they can move in conjunction with each other. In the action member, both left and right ends of the lower press part are rear hooks having a hook shape that opens rearward,
The eyelash curler according to claim 8, wherein the rear hooks are fitted onto the pair of support posts, thereby allowing the operating member to slide relative to the fixing member. 10. The eyelash curler according to claim 1, wherein the resin is a material having a Young's modulus of 2500 N/mm ³ to 40000 N/mm ³ , and the first arm portion and the hole frame portion of the fixing member, and the second arm portion and the tip portion of the force application member have a section modulus of 5 mm ³ to 40 mm ³ . 11. The eyelash curler according to claim 10, wherein the resin is a fiber-reinforced resin obtained by blending glass fiber (GF) with any one of polyamide (PA), polyether ether ketone (PEEK), polyethylene terephthalate (PET), glycol-modified PET (PETG), polyphenylene sulfide (PPS), and polyamide MXD6. The eyelash curler according to claim 11, wherein the fiber-reinforced resin is formed by blending the glass fiber (GF) in an amount of 30% by mass or more and 65% by mass or less into the resin. the resin is any one of nylon 6/10, polyether ether ketone (PEEK), polyethylene terephthalate (PET), glycol-modified PET (PETG), polyphenylene sulfide (PPS), and polyamide MXD6;
The eyelash curler according to claim 10, wherein the first arm portion and the hole frame portion of the fixing member, and the second arm portion and the tip portion of the force application member have a section modulus of 10 mm ³ or more.