JP6827136B2 - Lid for container - Google Patents

Description

The present invention relates to a lid for a container that is screwed to a tubular mouth extending from a closed container in which a fluid or the like is stored.

Some containers for storing fluids and the like have a supply port sealed to prevent the fluids and the like from leaking to the outside. If the supply port is formed at the tip of the tubular mouth extending from the container, the container is sealed by covering the supply port with a sealing material. Various lids have been proposed for sealing the supply port formed in such a tubular mouth portion (see, for example, Patent Document 1 (FIG. 1)).

The structure of the lid disclosed in Patent Document 1 will be described with reference to FIG.
As shown in FIG. 8, a tubular mouth portion 101 extends from a container 100 in which a liquid is stored, and a supply port 102 is formed at the tip of the tubular mouth portion 101. The lid 103 has a screw portion 105 that is screwed to the outer peripheral surface 104 of the tubular mouth portion 101, and a guide cylinder 107 that is guided along the inner peripheral surface 106 of the tubular mouth portion 101. An O-ring 109 is provided on the outer peripheral surface 108 of the guide cylinder 107, and the container 100 is sealed by pressing the O-ring 109 against the inner peripheral surface 106 of the tubular mouth portion 101. Further, when the lid 103 is closed to the end, it is also sealed by the annular packing 112 between the upper end 110 of the tubular mouth portion 101 and the closing plate 111 of the lid 103.

When the lid 103 is opened, the lid 103 rotates and rises in the opening direction. Therefore, a frictional force is applied to the O-ring 109 in a direction that hinders the movement of the lid 103. This force can be considered separately as a frictional force component in the rotational direction and a frictional force component in the downward direction. Further, since the annular packing 112 is pressed against the upper end 110 of the tubular mouth portion 101 for sealing, a frictional force in the rotational direction is also generated in the annular packing 112 at the beginning of opening the lid 103. As a result, the torque for opening the lid 103 increases.

Similarly, when the lid 103 is closed, the O-ring 109 generates friction that can be represented by a frictional force component in the rotational direction and a frictional force component in the ascending direction. Further, when the annular packing 112 is sealed while being pressed against the upper end 110 of the tubular mouth portion 101, a frictional force in the rotational direction is also generated between the lid 103 and the upper end 110 in order to rotate and close the lid 103. As a result, the torque for closing the lid 103 also increases.

However, it is preferable if the opening / closing torque of the lid can be reduced and the opening / closing of the lid can be facilitated.

Japanese Unexamined Patent Publication No. 9-178161

An object of the present invention is to provide a lid for a container that can reduce the opening / closing torque of the lid and facilitate the opening / closing without impairing the airtightness of the container.

A lid for a container that is screwed to the tubular mouth that extends from the container that stores the tooth surface cleaning powder.
With the bottom side of the container facing down and the tubular mouth side facing up,
The lid has an outer lid having a screw portion that is screwed to the outer peripheral surface of the tubular mouth portion, and a sealing material that is crushed by the inner peripheral surface of the tubular mouth portion, and is rotatable and rotatable on the outer lid. It is provided with an inner lid that is immovably attached outside a predetermined range and an annular ring member that restricts the downward movement of the inner lid, and the inner lid is a lid plate that closes the opening of the tubular mouth portion. An annular flange portion extending outward from the outer periphery of the lid plate, an inner protruding portion extending from the lid plate along the inner peripheral surface of the tubular mouth portion, and the seal formed on the outer periphery of the inner protruding portion. Equipped with an annular groove into which the material fits
The outer lid includes a tubular outer cylinder portion on which the threaded portion is formed, and an upper regulating portion that extends from the upper end of the outer cylinder portion toward the center and restricts the upward movement of the flange portion.
A holding groove portion for holding the ring member is formed on the inner circumference of the outer cylinder portion.
By fitting the claw of the ring member into the holding groove portion,
The ring member is provided inside the outer cylinder portion below the upper restricting portion, and the vertical movement with respect to the outer lid is restricted regardless of the position in the circumferential direction.
The ring member and the flange portions facing each other can be brought into contact with each other over the entire circumference.

The ring member is arranged below the flange portion.
It is characterized in that the passage of the flange portion from above the ring member to below the ring member is always prohibited.

The outer lid includes a first metal outer lid arranged inside and a second resin outer lid arranged outside the first outer lid, and the inner lid is made of resin. To do.

The lid includes an outer lid having a screw portion that is screwed to the outer peripheral surface of the tubular mouth portion and an inner lid that is rotatably attached to the outer lid. Therefore, when the outer lid is turned in the opening direction, the inner lid is provided. The lid does not rotate and only the outer lid begins to rotate. Since the inner lid is lifted by the outer lid without rotating as the outer lid rises, only the frictional force in the direction opposite to the rising direction is generated in the O-ring, and the frictional force in the rotational direction is not generated. As a result, the torque for opening the lid is reduced, and the lid can be easily opened. Similarly, when closing the lid, as the outer lid descends, the inner lid is pushed down by the outer lid without rotating, so that the sealing material generates only frictional force in the direction opposite to the descending direction, and friction in the rotational direction. No force is generated. As a result, the torque for closing the lid is reduced, and the lid can be easily closed.

Further, since the flange portion of the inner lid is arranged between the upper regulation portion of the outer lid and the ring member, the inner lid can be attached to the outer lid so as to be rotatable and vertically movable within a predetermined range with a simple structure. Can be done.
In addition, the container stores powder for cleaning the tooth surface. The frictional force of the tooth surface cleaning powder is larger than that of the liquid, but in the present invention, the sealing material does not rotate without being raised or lowered. Therefore, the influence of the frictional force of the tooth surface cleaning powder should be reduced as much as possible. Can be done.

Since the first outer lid forming the inside of the outer lid is made of metal and the inner lid is made of resin, the weight of the lid as a whole can be reduced as compared with the case where the outer lid and the inner lid are made of metal. ..

It is a perspective view of the tooth surface cleaning device equipped with the container and the lid which concerns on this invention. It is sectional drawing of the container and a lid. It is an exploded perspective view of the lid for a container. It is a bottom view of the lid for a container. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a 6-part enlarged view of FIG. It is an operation diagram of the lid for a container. It is a figure explaining the basic principle of the prior art.

Embodiments of the present invention will be described below with reference to the accompanying drawings. The following description illustrates a case where the container lid of the present invention is applied to a dental device in order to facilitate understanding of the present invention.

As shown in FIG. 1, the powder or granular material mixed gas generator (hereinafter referred to as a container) 20 and the lid 40 according to the present invention as an example of the usage state are mounted on the tooth surface cleaning device 10. The tooth surface cleaning device 10 includes a box-shaped control unit 13 including a water tank 11 and a container 20, a first tube 14 extending from the control unit 13, and tartar removal connected to the tip of the first tube 14. It has a handpiece 15 for cleaning, a second tube 16 extending from the control unit 13, and a handpiece 17 for cleaning the tooth surface connected to the tip of the second tube 16.

By ultrasonically vibrating the tartar removing handpiece 15 while receiving water from the water tank 11, the tartar is peeled from the teeth and removed with water. Further, the tooth surface cleaning handpiece 17 receives a supply of a mixed gas in which powder is mixed with the gas from the container 20 and plays a role of ejecting the mixed gas to the tooth surface.

The container 20 includes a box-shaped case 21 and a case base 22 that supports the case 21. The container 20 is made of resin, of which the case 21 and the container body 23 (see FIG. 2) are transparent. When the case 21 is made of colored resin, a transparent inspection window 20a is provided on the front surface of the case 21, and the remaining amount of powder can be checked through the inspection window 20a. Further, in the embodiment, the container 20 is made of resin, but the present invention is not limited to this, and the container 20 may be made of metal.

The details of the container 20 will be described below.
As shown in FIG. 2, the container 20 has a container body 23 having a hemispherical shell at the bottom, a tubular mouth portion 24 extending from the container body 23, and a container shoulder portion 25 extending outward from the tubular mouth portion 24. And a gas ejection part 26 and a mixed gas discharge part 27 attached to the container body 23. A male screw 28 is formed on the outer peripheral surface of the tubular mouth portion 24, and a lid 40 for closing the upper opening of the tubular mouth portion 24 is screwed to the male screw 28.

The lid 40 has an outer lid 41 having a female screw (screw portion) 43 that is screw-coupled to the male screw 28 of the tubular mouth portion 24, and is attached to the outer lid 41 so as to be rotatable and immovable outside a predetermined range. It includes an inner lid 61 having a sealing material (hereinafter, also referred to as an O-ring) 71 that is crushed by the inner peripheral surface 29 of the mouth portion 24. In the embodiment, the sealing material 71 is an O-ring, but the present invention is not limited to this, and other general elastic members may be used as long as the container 20 and the lid 40 can be sealed.

The outer lid 41 includes a first metal outer lid 42 arranged inside and a second resin outer lid 52 arranged outside the first outer lid 42. The inner lid 61 can be smoothly rotated with respect to the first outer lid 42. Further, by making the second outer lid 52 made of resin, the appearance shape can be easily formed, the appearance can be improved, and the component cost of the entire lid 40 can be reduced.

By twisting the outer lid 41, the male screw 28 can be screwed into the female screw 43 provided on the first outer lid 42. By twisting (turning) in the opposite direction to the case of screwing, the male screw 28 can be loosened from the female screw 43. Even if the outer lid 41 is twisted to the end when the lid 40 is closed, the upper end 33 of the tubular mouth portion 24 does not come into contact with the outer lid 41 or the inner lid 61. Therefore, even if the lid 40 is closed to the end, the upper end 33 of the tubular mouth portion 24 does not receive a downward force from the lid 40. As a result, when the lid 40 is closed, no frictional force is generated at the upper end 33 of the tubular mouth portion 24. Similarly, when the lid 40 is opened, no frictional force is generated at the upper end of the tubular mouth portion 24.

In the embodiment, when the lid 40 is closed to the end, the lower end 44 of the outer lid 41 does not abut on the container shoulder 25, but the lower end 44 of the outer lid 41 is not in contact with the container shoulder 25. You can touch it.

The container body 23 includes a hemispherical shell portion 31 whose inner surface is a hemispherical surface 28, and a cylindrical portion 32 extending upward from the hemispherical shell portion 31. The hemispherical shell portion 31 and the cylindrical portion 32 are continuous integrated objects.

The container 20 has a chamber 34 (chamber 34 is composed of a container body 23 and a lid 40 in the embodiment) having a space for storing a tooth surface cleaning powder (hereinafter referred to as powder). By ejecting the gas from the gas ejection portion 26, a circulating flow is formed around the inside of the chamber 34, and the powder and the gas are mixed to generate a mixed gas. A part of this mixed gas is discharged to the outside from the mixed gas discharge unit 27. Since the container body 23 and the lid 40 are sealed by the sealing material 71, the powder does not leak to the outside of the sealing material 71.

As shown in FIG. 3, the lid 40 includes an outer lid 41 and an inner lid 61 assembled inside the outer lid 41. Specifically, the attachment portion 45 of the first outer lid 42 is fastened to the support portion 53 of the second outer lid 52 by the fastening member 54, the inner lid 61 is assembled inside the first outer lid 42, and the inner lid 42 An O-ring 71 is assembled on the outer circumference, and a ring member 72 that supports the inner lid 61 on the first outer lid 42 is assembled inside the first outer lid 42.

A notch 43a is formed in the first outer lid 42. When the lid 40 is screwed to the container 20 (see FIG. 2), the notch 43a determines the position where the female screw 43 of the lid 40 meshes with the male screw 28 of the container 20, and also determines the position when the lid 40 is completely closed. ..

Of the four lateral sides 55a, 55b, 55c, 55d of the second outer lid, one is the side surface 55a at the reference position, and the area of the flat surface portion is larger than the other three side surfaces 55b, 55c, 55d. .. The side surface 55a of the reference position coincides with the case surface 21a of the reference position of the case 21 (see FIG. 1) by closing the lid 40 to the end. The area of the flat portion of the case surface 21a at the reference position is larger than that of the other three case surfaces. In this way, it can be easily confirmed that the lid 40 is closed to the end by the side surface 55a of the reference position.

As shown in FIGS. 2, 4, and 5, the inner lid 61 includes a lid plate 62 that closes the opening of the tubular mouth portion 24, a flange portion 63 that extends outward from the outer circumference of the lid plate 62, and a lid plate. It includes an inwardly projecting portion 64 extending from 62 along the inner peripheral surface 29 of the tubular mouth portion 24, and an annular groove 65 into which an O-ring 71 formed on the outer periphery of the inwardly protruding portion 64 is fitted.

The first outer lid 42 has a tubular outer cylinder portion 46 on which a female screw 43 is formed, and an upper regulation portion 47 that extends from the upper end of the outer cylinder portion 46 toward the center and restricts the upward movement of the flange portion 63. A ring member 72 provided inside the outer cylinder portion 46 below the upper restricting portion 47 and restricting the downward movement of the flange portion 63 is provided. An opening 48 is formed inside the upper regulating portion 47. The opening 48 allows the first metal outer lid 42 to be made lighter.

As shown in FIG. 6, a holding groove portion 49 for holding the ring member 72 is formed on the inner circumference of the outer cylinder portion 46. By fitting the claw 73 of the ring member 72 into the holding groove 49, the ring member 72 is restricted from moving in the vertical direction with respect to the first outer lid 42.

The inner lid 61 is provided so as to be slightly movable in the lateral direction and the vertical direction with respect to the outer lid 41. A lateral gap 66 is formed between the inner circumference of the outer cylinder portion 46 and the outer circumference of the flange portion 63. Since the inner lid 61 can move laterally relative to the outer lid 41 due to the lateral gap 66, when the lid 40 is screwed into the tubular mouth portion 24, the inner lid 61 is inside the tubular mouth portion 24. It can be easily guided to the peripheral surface 29 side. Further, the inner lid 61 can smoothly rotate with respect to the outer lid 41 due to the lateral gap 66. Further, due to the lateral gap 66, the lid 40 can be appropriately opened and closed without depending on the positional relationship between the center of the inner lid 61 and the rotation axis of the outer lid 41.

In a natural state, a vertical gap 67 is formed between the lower surface of the upper regulating portion 47 and the upper surface of the flange portion 63. The vertical gap 67 moves (forms) between the lower surface of the flange portion 63 and the upper surface of the ring member 72 when the inner lid 61 moves toward the upper regulating portion 47 of the outer lid 41. Therefore, the inner lid 61 is rotatably attached to the outer lid 41 and cannot move up and down outside a predetermined range. In other words, the inner lid 61 is attached to the outer lid 41 so as to be vertically movable within a predetermined range.

The operation of the lid 40 for the container 20 described above will be described below.
FIG. 7A shows a state in which the lid 40 is closed. When the lid 40 is turned in the closing direction, the inner lid 61 descends along the inner peripheral surface 29 of the tubular mouth portion 24, and the O-ring 71 comes into contact with the inside of the upper end 33 of the tubular mouth portion 24. Further, when the lid 40 is turned in the closing direction, the inner lid 61 does not turn and only the outer lid 41 starts to turn. As the outer lid 41 rotates, the outer lid 41 descends with respect to the tubular mouth portion 24 as shown by the arrow (1). Although the inner lid 61 does not rotate, it rises relative to the outer lid 41 as shown by the arrow (2) and is pushed down by the outer lid 61. Specifically, the inner lid 61 temporarily stops descending with respect to the tubular mouth portion 24, and then descends again.

At this time, a frictional force in the ascending direction is generated on the O-ring 71. This frictional force is smaller than that of the prior art (friction force component in the ascending direction + frictional force component in the rotational direction). Therefore, the closing torque of the lid 40 can be reduced, and the lid 40 can be easily closed.

FIG. 7B shows a fully closed state of the lid 40. When the lid 40 is turned in the opening direction from this state, the inner lid 61 does not turn and only the outer lid 41 starts to turn. As the outer lid 41 rotates, the outer lid 41 rises with respect to the tubular mouth portion 24 as shown by the arrow (3). The inner lid 61 does not rotate, but moves relative to the outer lid 41 as shown by the arrow (4) because there is a gap 67 in the vertical direction.

If the inside of the outer lid 41 is pressed against the upper end 33 of the tubular mouth portion 24 to seal the lid 40 in the fully closed state, a downward force is generated on the upper end 33, so that when the lid 40 is opened, The static frictional force becomes large, and the frictional force in the rotational direction is also generated from the upper end 33 of the tubular mouth portion 24.

In this respect, in the present invention, the inner lid 61 can be moved up and down within a predetermined range with respect to the outer lid 41 by the vertical gap 67, so that the upper end 33 of the tubular mouth portion 24 receives a static friction force. No frictional force is generated in the rotational direction from the upper end 33 of the tubular mouth portion 24. As a result, there is no frictional force in the rotation direction when the lid 40 is opened from the fully closed state, and the lid 40 can be easily started to be opened.

FIG. 7C shows a state in which the lid 40 is opened. Further, as the outer lid 41 rotates, the outer lid 41 rises with respect to the tubular mouth portion 24 as shown by an arrow (5). The inner lid 61 does not rotate, but is lifted by the ring member 72 of the outer lid 41.

At this time, a frictional force in the downward direction is generated on the O-ring 71. This frictional force is smaller than that of the prior art (friction force component in the downward direction + frictional force component in the rotational direction). Therefore, the closing torque of the lid 40 can be reduced, and the lid 40 can be easily opened.

The container lid 40 of the present invention is suitable for the container 20 of the tooth surface cleaning device 10, but it may be provided in a general closed container other than the container 20 of the tooth surface cleaning device 10.
Further, in the present invention, the sealing material 71 is provided on the lid 40, but the present invention is not limited to this, and the sealing material 71 may be provided on the container 20.

The container lid 40 of the present invention described above will be described below from different viewpoints. As described above, the container lid 40 of the present invention supports the opening and closing of the inner lid 61 that closes the tubular mouth portion 24 of the container 20 that houses the contents, and the tubular mouth portion 24 by the inner lid 61. It is provided with an outer lid 41. The tubular mouth portion 24 of the container 20 has a cylindrical shape having an inner side surface, and the inner lid 61 includes a lid plate side surface facing the inner side surface thereof. Further, the inner lid 61 includes a sealing material 71 in contact with the inner side surface of the tubular mouth portion 24. The sealing material 71 is arranged on the side surface of the lid plate of the inner lid 61.
When the tubular mouth portion 24 of the container 20 is opened vertically upward, the inner lid 61 lowers and rises with reference to the container 20. The outer lid 41 includes a first plane 47a that lowers the inner lid 61 with respect to the tubular mouth portion 24. Further, the outer lid 41 is provided with a second flat surface 72a that raises the inner lid 61 with respect to the tubular mouth portion 24.
In the present invention, the friction coefficient between the first plane 47a and the inner lid 61 is lower than the friction coefficient between the wall side surface and the sealing material 71, and the friction coefficient between the second plane 72a and the inner lid 61 is also the wall. It is lower than the coefficient of friction between the side surface and the sealing material 71. This makes it possible to reduce the burden on the user when opening and closing the lid.

More specifically, the outer lid 41 includes an inner side surface on the outer lid side facing the outer wall of the tubular mouth portion 24 (hereinafter, referred to as the outer circumference of the opening). A container-side screw (male screw) 28 is provided on the outer periphery of the opening. Further, the inner side surface on the outer lid side is provided with a lid side screw (female screw) 43 corresponding to the container side screw 28. The outer lid 41 rotates according to the guidance between the container-side screw 28 and the lid-side screw 43. At this time, the sealing material 71 suppresses the rotation of the inner lid 61 based on the friction between the tubular mouth portion 24 and the inner side surface. The first plane 47a or the second plane 72a allows sliding between the outer lid 41 and the inner lid 61. As a result, the load due to the frictional force in the direction opposite to the rotation direction is alleviated, and the burden on the user when opening and closing the lid 40 is reduced.

Further, the outer lid 41 includes a tubular outer cylinder portion 46, an upper regulation portion 47, and a ring member 72. The upper regulating portion 47 is arranged inside the outer cylinder portion 46 and includes a first plane 47a in contact with the inner lid 61. The ring member 72 is formed inside the outer cylinder portion 46 separately from the upper regulating portion 47. The ring member 72 includes a second plane 72a in contact with the inner lid 61.
The inner lid 61 includes a flange portion 63 sandwiched between the upper regulating portion 47 and the ring member 72. The thickness of the flange portion 63 is smaller than the distance between the upper regulating portion 47 and the ring member 72.

The lid-side side surface of the inner lid 61 is configured as an inner protrusion 64 capable of holding the sealing material 71. The inner protruding portion 64 is continuously provided from the flange portion 63. The wall forming the tubular mouth portion 24 is cylindrical with an inner diameter. The outer diameter of the annular sealing material 71 is larger than the inner diameter of the tubular mouth portion 24.

Further, the diameter of the flange portion 63 of the inner lid 61 (hereinafter, referred to as the flange-shaped portion outer diameter) is smaller than the minimum inner diameter of the outer cylinder portion 46 of the outer lid 41, so that the inner lid 61 can move in the radial direction. Tolerate. Further, the upper regulating portion 47 has a first inner diameter, and similarly, the ring member 72 has a second inner diameter. At this time, the outer diameter of the brim-shaped portion is larger than the first inner diameter or the second inner diameter. Further, as a matter of course, the diameter of the inner protrusion 64 of the inner lid 61 is smaller than the first inner diameter or the second inner diameter.

In the above-described embodiment, the present invention has been described by exemplifying a configuration in which the inner lid 61 includes a flange portion 63. The present invention is not limited to such a configuration. For example, an annular portion corresponding to the flange portion 63 may be arranged inside the outer cylinder portion 46 of the outer lid 41. In this case, the annular portion includes the first plane 47a and the second plane 72a. Further, the inner lid 61 is provided with a groove-shaped portion corresponding to the upper regulating portion 47 and the ring member 72.

20 ... Container 23 ... Container body 24 ... Cylindrical mouth 28 ... Male screw 29 ... Inner peripheral surface 40 ... Lid 41 ... Outer lid 42 ... First outer lid 43 ... Threaded part (female screw)
46 ... Outer cylinder part 47 ... Upper regulation part 52 ... Second outer lid 61 ... Inner lid 62 ... Lid plate 63 ... Flange part 64 ... Inner protrusion 65 ... Circular groove 71 ... Sealing material (O-ring)
72 ... Ring member

Claims (3)

A lid for a container that is screwed to the tubular mouth that extends from the container that stores the tooth surface cleaning powder.
With the bottom side of the container facing down and the tubular mouth side facing up,
The lid has an outer lid having a screw portion that is screwed to the outer peripheral surface of the tubular mouth portion, and a sealing material that is crushed by the inner peripheral surface of the tubular mouth portion, and is rotatable and rotatable on the outer lid. It is provided with an inner lid that is immovably attached outside a predetermined range and an annular ring member that restricts the downward movement of the inner lid, and the inner lid is a lid plate that closes the opening of the tubular mouth portion. An annular flange portion extending outward from the outer periphery of the lid plate, an inner protruding portion extending from the lid plate along the inner peripheral surface of the tubular mouth portion, and the seal formed on the outer periphery of the inner protruding portion. Equipped with an annular groove into which the material fits
The outer lid includes a tubular outer cylinder portion on which the threaded portion is formed, and an upper regulating portion that extends from the upper end of the outer cylinder portion toward the center and restricts the upward movement of the flange portion.
A holding groove portion for holding the ring member is formed on the inner circumference of the outer cylinder portion.
By fitting the claw of the ring member into the holding groove portion,
The ring member is provided inside the outer cylinder portion below the upper restricting portion, and the vertical movement with respect to the outer lid is restricted regardless of the position in the circumferential direction.
A lid for a container, characterized in that the surfaces of the ring member and the flange portion facing each other can be brought into contact with each other over the entire circumference. The ring member is arranged below the flange portion.
The lid for a container according to claim 1, wherein the passage of the flange portion from above the ring member to below the ring member is always prohibited. The outer lid includes a first metal outer lid arranged inside and a second resin outer lid arranged outside the first outer lid, and the inner lid is made of resin. The lid for the container according to claim 1 or 2.

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