Connection pin and compact container

Abstract

To provide for a free stoping function while suppressing force required for rotating a lid around a connection pin.SOLUTION: At least a portion of an outer peripheral surface of a sliding part which slides on an inner peripheral surface of an installation hole formed in a lid is formed of a hard part made of a first resin material having high hardness and a soft part made of a second resin material having low hardness which are provided in a circumferential direction around a center axis of a connection pin. The connection pin has a body shaft formed of the first resin material and arranged coaxially with the center axis. On an outer peripheral surface of the body shaft, a filling recess that is recessed inward in a radial direction is formed. The filling recess is filled with a soft member made of the second resin material. A clearance recess part that is recessed inward in the radial direction is formed at a peripheral edge of an opening of the filling recess on the outer peripheral surface of the body shaft. The hard part of the sliding part is at least part of a portion of the outer peripheral surface of the body shaft in which the filling recess and the clearance recess are not formed. The soft part of the sliding part is at least part of the outer peripheral surface of the soft member.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a connecting pin and a compact container. [Background technology]

[0002] Conventionally, compact containers have been known which include a flat container body having a storage section in which the contents are stored, a lid body which closes the storage section so that it can be opened, and a connecting pin which connects the container body and the lid body to each other, and in which the storage section is opened and closed by rotating the lid body around the connecting pin relative to the container body. In recent years, in order to increase the recyclability of materials by eliminating the need for separation when discarding compact containers, connecting pins made of resin material have been adopted, as shown in Patent Document 1 below, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-37622 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional compact containers, there was room for improvement in terms of being equipped with a so-called free stop function that reduces the force required to rotate the lid body around the connecting pin, while allowing the lid body to be temporarily fixed in any rotational position with the storage compartment open, even when the lid body is released.

[0005] The present invention provides a connecting pin and a compact container that can be provided with a free stop function while reducing the force required to rotate a lid body around the connecting pin. [Means for solving the problem]

[0006] A connecting pin according to one aspect of the present invention is a connecting pin that connects a container body having a storage section in which contents are stored and a lid body that closes the storage section in an openable manner, and the storage section is opened and closed by the lid body rotating around the connecting pin relative to the container body, and the lid body is provided with a sliding part having an outer circumferential surface that slides on the inner circumferential surface of an attachment hole formed in the lid body as the storage section is opened and closed, and at least a part of the outer circumferential surface of the sliding part is configured so that a hard part made of a first resin material having a high hardness and a soft part made of a second resin material having a low hardness are provided along the circumferential direction along the central axis of the connecting pin. a main body shaft formed of the first resin material and arranged coaxially with the central axis, a filling recess recessed radially inward is formed on an outer peripheral surface of the main body shaft, and a soft member formed of the second resin material is filled into the filling recess, a relief recess recessed radially inward is formed on an opening periphery of the filling recess on the outer peripheral surface of the main body shaft, a hard portion of the sliding portion is at least a part of the non-formed portions of the filling recess and the relief recess on the outer peripheral surface of the main body shaft, and a soft portion of the sliding portion is at least a part of the outer peripheral surface of the soft member.

[0007] A compact container according to one aspect of the present invention comprises a connecting pin according to one aspect of the present invention, the flat container body, and the lid body.

[0008] Since the outer peripheral surface of the sliding portion of the connecting pin is provided with a soft portion, the soft portion can be pressed against the inner peripheral surface of the mounting hole of the lid body in an elastically deformed state, thereby providing a so-called free stop function, which allows the lid body to be temporarily fixed in any rotational position with the storage section open even when the hand is released. At least a portion of the outer peripheral surface of the sliding portion of the connecting pin is configured with a hard portion and a soft portion arranged circumferentially. Therefore, compared to a case where at least a portion of the outer peripheral surface of the sliding portion is a soft portion over the entire circumference, it is possible to make it easier for the soft portion to elastically deform when the outer peripheral surface of the sliding portion slides along the inner peripheral surface of the mounting hole, and the force required to rotate the cover body around the connecting pin can be reduced. Since an escape recess recessed radially inward is formed on the opening periphery of the filling recess on the outer circumferential surface of the main shaft, the circumferential end of the soft member can be easily separated radially from the inner circumferential surface of the mounting hole formed in the lid, and even if burrs protruding from the filling recess are generated on the soft member when the soft member is filled into the filling recess, the burrs can be easily positioned within the escape recess and separated radially from the inner circumferential surface of the mounting hole. This makes it possible to suppress the application of circumferential tensile force from the inner circumferential surface of the mounting hole to the circumferential end and burrs of the soft member when the lid is rotated around the connecting pin, and prevents the soft member from peeling off from the inner surface of the filling recess and the burrs from being torn off.

[0009] The filling recess, the soft member, and the relief recess may be provided at least one on each side of the central axis in a radial direction.

[0010] Since the filling recess, soft member, and escape recess are provided at least one on each side radially sandwiching the central axis, multiple hard portions and multiple soft portions are provided alternately in the circumferential direction, which allows the free stop function to be stably performed and reduces the load generated in the soft member when the lid body is rotated around the connecting pin.

[0011] The soft portion may have a protruding portion formed on at least a portion in a circumferential direction, the protruding portion protruding radially outward from the hard portion.

[0012] Since the soft portion has a protruding portion that protrudes radially outward from the hard portion at least in a portion in the circumferential direction, the soft portion can be easily and reliably elastically deformed.

[0013] The first resin material may be a polyester resin, and the second resin material may be an elastomer resin.

[0014] Since the first resin material is a polyester-based resin and the second resin material is an elastomer resin, it is possible to easily obtain a connecting pin and a compact container that can reliably provide a free stop function while reducing the force required to rotate the lid body around the connecting pin. Effect of the Invention

[0015] According to the above aspect of the present invention, it is possible to provide a free stop function while reducing the force required to rotate the lid body around the connecting pin. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a top view showing the compact case of one embodiment with the lid open. [Diagram 2] FIG. 4 is a view of a connecting pin according to an embodiment as viewed from the outside in the radial direction. [Diagram 3] 3 is a cross-sectional view taken along line III-III in FIG. 2, showing an example of burrs formed on a soft member. [Figure 4] FIG. 2 is a perspective view of a hard member of a connecting pin according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1, the compact case 1 of this embodiment includes a case body 11 having a storage section 11a in which contents are stored, a lid body 12 that closes the storage section 11a in an openable manner, and a connecting pin 10. The case body 11, the lid body 12, and the connecting pin 10 are formed of a resin material.

[0018] Hereinafter, the direction in which the accommodating portion 11a is open will be referred to as the upper side, and the opposite direction will be referred to as the lower side. The direction in which the central axis O of the connecting pin 10 extends will be referred to as the axial direction. The direction intersecting the central axis O as viewed from the axial direction will be referred to as the radial direction, and the direction going around the central axis O as viewed from the axial direction will be referred to as the circumferential direction. In the illustrated example, the central axis O extends in a direction perpendicular to the vertical direction. However, the central axis O may extend along the vertical direction.

[0019] The container body 11 is formed in a flat, bottomed tubular shape whose size in the vertical direction is smaller than its size in a direction intersecting the vertical direction. When viewed from the vertical direction, two insertion recesses 11b are formed at an axial interval on the outer peripheral edge of the container body 11. The insertion recesses 11b penetrate the container body 11 in the vertical direction and open to the outer peripheral surface of the container body 11. The container body 11 is formed with a first mounting hole 11c that extends in the axial direction and opens to the axial end face of the container body 11 and the insertion recesses 11b. The first mounting hole 11c is formed separately at both ends of the container body 11 in the axial direction.

[0020] The lid 12 is formed with a leg piece 12a that protrudes downward and is inserted into the insertion recess 11b of the container body 11. Both axial end faces of the leg piece 12a abut against or are close to opposing faces that face each other in the axial direction among the inner faces of the insertion recess 11b. The leg piece 12a is formed with a second mounting hole (mounting hole) 12b that penetrates in the axial direction and faces the first mounting hole 11c of the container body 11 in the axial direction.

[0021] The connecting pin 10 is integrally fitted into the first mounting hole 11c and the second mounting hole 12b, and connects the container body 11 and the lid body 12 to each other. The lid body 12 rotates around the connecting pin 10 relative to the container body 11 to open and close the storage section 11a.

[0022] 2, the connecting pin 10 includes a pin body 13 extending in the axial direction, a first tapered portion 10a provided at one axial end of the pin body 13, and a second tapered portion 10b provided at the other axial end of the pin body 13. Note that the connecting pin 10 does not necessarily have to have the first tapered portion 10a and the second tapered portion 10b. The outer diameter of the pin body 13 is constant over the entire axial length. The first tapered portion 10a decreases in diameter as it moves away from the pin body 13 to one axial side, and the second tapered portion 10b decreases in diameter as it moves away from the pin body 13 to the other axial side. The second tapered portion 10b of the connecting pin 10 is inserted from the opening of the first mounting hole 11c in the axial end face of the container body 11, and is fitted into the first mounting hole 11c and the second mounting hole 12b.

[0023] The pin body 13 has a fixed portion 13a that is fitted into the first mounting hole 11c and a sliding portion 13b that is fitted into the second mounting hole 12b. The fixed portion 13a and the sliding portion 13b have the same length.

[0024] The fixing portion 13a is fitted in the first mounting hole 11c in a fixed state. The outer peripheral surface of the fixing portion 13a is configured such that a hard portion made of a first resin material having a high hardness and a soft portion made of a second resin material having a low hardness are provided along the circumferential direction over the entire axial length. The entire outer circumferential surface of the fixing portion 13a may be a hard portion or a soft portion.

[0025] The outer peripheral surface of the sliding portion 13b slides on the inner peripheral surface of the second mounting hole 12b of the lid 12 as the storage portion 11a is opened and closed. At least a part of the outer peripheral surface of the sliding portion 13b is configured by a hard portion 14 made of a first resin material having a high hardness and a soft portion 15 made of a second resin material having a low hardness, which are provided along the circumferential direction. The hard portion 14 is axially connected to the hard portion of the fixed portion 13a and formed integrally therewith. The soft portion 15 is axially connected to the soft portion of the fixed portion 13a and formed integrally therewith.

[0026] In the illustrated example, the outer peripheral surface of the sliding portion 13b, except for the other end portion in the axial direction, is configured by providing the hard portion 14 and the soft portion 15 along the circumferential direction. The other end portion in the axial direction of the outer peripheral surface of the sliding portion 13b is configured by the hard portion 14 over the entire circumference. The outer circumferential surface of the sliding portion 13b may be configured such that the hard portion 14 and the soft portion 15 are provided along the circumferential direction over the entire axial length. For example, the outer circumferential surface of the sliding portion 13b may have a configuration in which a plurality of portions each including the hard portion 14 and the soft portion 15 provided along the circumferential direction are provided at intervals in the axial direction.

[0027] The circumferential size of the soft portion 15 is smaller than the circumferential size of the hard portion 14. The circumferential size of the soft portion 15 may be greater than or equal to the circumferential size of the hard portion 14. The first resin material is a polyester resin, and the second resin material is an elastomer resin. The materials of the first resin material and the second resin material may be changed as appropriate.

[0028] Examples of polyester-based resins used for the first resin material include homo-PET (PET), glycol-modified PET (PET-G), isophthalic acid-modified PET (I-PET), and polybutylene terephthalate (PBT). Examples of the elastomer resin used for the second resin material include polyester-based elastomer resins such as "Estelar" manufactured by Aron Chemical Industry Co., Ltd., "Hytrel" manufactured by Toray Celanese Inc., and "Tefabloc" manufactured by Mitsubishi Chemical Corporation. The materials of the first resin material and the second resin material are selected taking into consideration not only the mechanical properties but also the fusibility.

[0029] A protruding portion 16 that protrudes radially outward from the hard portion 14 is formed in at least a portion of the soft portion 15 in the circumferential direction. As shown in FIG. 3, the outer peripheral surface of the protruding portion 16 is curved toward the radially outward side in a cross-sectional view perpendicular to the axial direction. In the cross-sectional view, the radius of curvature of the outer peripheral surface of the protruding portion 16 is smaller than the radius of curvature of the outer peripheral surface of the hard portion 14. The protruding portion 16 is provided over the entire circumferential area of ​​the soft portion 15. The protruding portion 16 may be provided, for example, only in a portion of the soft portion 15 in the circumferential direction. The protruding portion 16 is provided over the entire axial length of the soft portion 15. A chamfered portion 16b is formed at the end portion on the other axial side of the protruding portion 16, extending radially inward as it approaches the other axial side. The soft portion of the fixed portion 13a is also formed with a protruding portion similar to the protruding portion 16 formed on the soft portion 15 of the sliding portion 13b.

[0030] The connecting pin 10 includes a hard member 20 made of a first resin material and a soft member 30 made of a second resin material.

[0031] The hard member 20 includes a main body shaft 21 disposed coaxially with the central axis O, the second tapered portion 10b described above extending from the other axial end face of the main body shaft 21 toward the other axial side, and an end portion 22 extending from one axial end face of the main body shaft 21 toward one axial side and constituting a part of the first tapered portion 10a described above. Note that the hard member 20 does not necessarily have to include the second tapered portion 10b and the end portion 22. The outer diameter of the main body shaft 21 is constant over the entire axial length. The second tapered portion 10b and the end portion 22 are formed in a truncated cone shape disposed coaxially with the central axis O.

[0032] A filling recess 23 is formed on the outer circumferential surface of main shaft 21, recessed radially inward. Filling recess 23 extends in the axial direction and is provided over the entire axial length of main shaft 21 excluding the other axial end. One filling recess 23 is provided on each side of central axis O in the radial direction. Note that one filling recess 23 or three or more filling recesses 23 may be provided at intervals in the circumferential direction. A first groove 22a communicating with the filling recesses 23 is formed in the end portion 22. As shown in Fig. 4, the first groove 22a penetrates the end portion 22 in the radial direction and opens integrally to the outer circumferential surface and one axial end face of the end portion 22. The first groove 22a radially communicates one axial end of each of the two filling recesses 23 with each other.

[0033] The soft member 30 is filled in each of the two filling recesses 23. The soft member 30 and the main shaft 21 constitute the pin main body 13. The other axial side portion of the outer circumferential surface of the soft member 30 constitutes the soft portion 15 of the sliding portion 13b that abuts against the inner circumferential surface of the second mounting hole 12b. The one axial side portion of the outer circumferential surface of the soft member 30 constitutes the soft portion of the fixing portion 13a. The soft member 30 is formed in a rectangular parallelepiped shape extending in the axial direction. The two soft members 30 are connected via a connecting piece 30a made of the same material as the soft members 30. The connecting piece 30a is filled in the first groove 22a. The outer surface of the connecting piece 30a is flush with the outer circumferential surface of the end portion 22 and with the end face on one side in the axial direction. The connecting piece 30a and the end portion 22 constitute the first tapered portion 10a.

[0034] An escape recess 24 recessed radially inward is formed on the opening periphery of filling recess 23 on the outer circumferential surface of body shaft 21. Escape recess 24 is formed on the opening periphery of each of two filling recesses 23 on the outer circumferential surface of body shaft 21. Escape recess 24 is provided continuously around the entire circumference of the opening periphery of filling recess 23 on the outer circumferential surface of body shaft 21. One axial end of escape recess 24 does not open to first groove 22a, but is closed by end portion 22. The depth of escape recess 24 is shallower than the depth of filling recess 23.

[0035] Of the outer peripheral surface of the other axial half of main shaft 21, the portions not forming filling recess 23 and relief recess 24 constitute hard portion 14 of sliding portion 13b that slides on the inner peripheral surface of second mounting hole 12b. Of the outer peripheral surface of one axial half of main shaft 21, the portions not forming filling recess 23 and relief recess 24 constitute hard portion of fixing portion 13a. Filling recess 23 and relief recess 24 may be formed only on the other axial half of the outer circumferential surface of main shaft 21. In this case, hard portion 14 of sliding portion 13b corresponds to the entire non-forming portion of filling recess 23 and relief recess 24 on the outer circumferential surface of main shaft 21, and soft portion 15 of sliding portion 13b corresponds to the entire outer circumferential surface of soft member 30.

[0036] As described above, according to the connecting pin 10 and compact container 1 of this embodiment, the outer peripheral surface of the sliding portion 13b of the connecting pin 10 is provided with the soft portion 15, so that by pressing the soft portion 15 against the inner peripheral surface of the second mounting hole 12b of the lid body 12 in an elastically deformed state, it is possible to provide a so-called free stop function in which the lid body 12 can be temporarily fixed in any rotational position with the storage portion 11a open even when the lid body 12 is released. At least a portion of the outer peripheral surface of the sliding portion 13b of the connecting pin 10 is configured with a hard portion 14 and a soft portion 15 arranged along the circumferential direction. Therefore, compared to the case where at least a portion of the outer peripheral surface of the sliding portion 13b is made of the soft portion 15 over the entire circumference, it is possible to make it easier to elastically deform the soft portion 15 when the outer peripheral surface of the sliding portion 13b slides against the inner peripheral surface of the second mounting hole 12b, and the force required to rotate the cover body 12 around the connecting pin 10 can be reduced.

[0037] Since an escape recess 24 recessed radially inward is formed at the opening peripheral edge of the filling recess 23 on the outer surface of the main shaft 21, the circumferential end of the soft member 30 can be easily separated radially from the inner surface of the second mounting hole 12b. Even if burrs X protruding from the filling recess 23 are generated on the soft member 30 when the soft member 30 is filled into the filling recess 23, the burrs X can be positioned within the escape recess 24 and easily separated radially from the inner surface of the second mounting hole 12b. This makes it possible to suppress the application of circumferential tensile force from the inner surface of the second mounting hole 12b to the circumferential ends and burrs X of the soft member 30 when the lid body 12 is rotated around the connecting pin 10, thereby preventing the soft member 30 from peeling off from the inner surface of the filling recess 23 and the burrs X from being torn off.

[0038] Since the filling recess 23, the soft member 30, and the escape recess 24 are provided at least one on each side radially sandwiching the central axis O, a plurality of hard portions 14 and a plurality of soft portions 15 are provided alternately in the circumferential direction, which enables the free stop function to be stably exerted and reduces the load generated on the soft member 30 when the lid body 12 is rotated around the connecting pin 10.

[0039] Since the soft portion 15 has the protruding portion 16 formed on at least a portion in the circumferential direction, which protrudes radially outward from the hard portion 14, the soft portion 15 can be easily and reliably elastically deformed.

[0040] Since the first resin material is a polyester-based resin and the second resin material is an elastomer resin, it is possible to easily obtain a connecting pin 10 and a compact container 1 that can reliably provide a free stop function while reducing the force required to rotate the lid body 12 around the connecting pin 10.

[0041] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0042] For example, the protruding portion 16 does not have to be formed in the soft portion 15 . For example, one each of the insertion recess 11b and leg piece 12a may be provided. The connecting pin 10 may be used in containers other than the compact container 1.

[0043] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described embodiments and the above-described variations may be combined as appropriate.

[0044] For example, aspects of the present invention are as follows. <1> A connecting pin that connects a container body having a storage section in which contents are stored and a lid that closes the storage section in an openable manner, The lid body rotates around the connecting pin relative to the container body to open and close the storage section, a sliding portion having an outer circumferential surface that slides on an inner circumferential surface of the mounting hole formed in the lid body when the storage portion is opened or closed, at least a part of an outer circumferential surface of the sliding portion is configured such that a hard portion made of a first resin material having a high hardness and a soft portion made of a second resin material having a low hardness are provided along a circumferential direction around a central axis of the connecting pin, a main body shaft formed of the first resin material and arranged coaxially with the central axis line; A filling recess is formed on an outer circumferential surface of the main shaft, the filling recess being recessed radially inward, The filling recess is filled with a soft member made of the second resin material, a relief recess recessed toward the inside in the radial direction is formed on the outer circumferential surface of the main shaft at a peripheral edge of an opening of the filling recess, the hard portion of the sliding portion is at least a part of a portion of an outer circumferential surface of the main shaft where the filling recess and the relief recess are not formed, A connecting pin, wherein the soft portion of the sliding portion is at least a part of an outer circumferential surface of the soft member. <2> The filling recess, the soft member, and the relief recess are provided at least one on each side of the central axis in a radial direction. <1> The connecting pin according to claim 1 . <3> The soft portion has a protruding portion formed in at least a part of the circumferential direction, the protruding portion protruding radially outward from the hard portion. <1> or <2> The connecting pin according to claim 1 . <4> The first resin material is a polyester-based resin, The second resin material is an elastomer resin. <1> from <3> 13. A connecting pin according to any one of claims 1 to 12. <5> The above <1> from <4> A compact container comprising the connecting pin described in any one of the above, the flat container body, and the lid body. [Explanation of symbols]

[0045] 1 Compact container 10 Connecting pin 11 Container body 11a Storage section 12 Lid 12b Second mounting hole (mounting hole) 13b Sliding part 14 Hard part 15 Soft part 16 Overhang 20 Hard materials 21 Main body shaft 23 Filling recess 24 Relief recess 30 Soft materials O center axis

Claims

1. A connecting pin that connects a container body having a storage section in which contents are stored and a lid that closes the storage section in an openable manner, The lid body rotates around the connecting pin relative to the container body to open and close the storage section, a sliding portion having an outer circumferential surface that slides on an inner circumferential surface of the mounting hole formed in the lid body when the storage portion is opened or closed, at least a part of an outer circumferential surface of the sliding portion is configured such that a hard portion made of a first resin material having a high hardness and a soft portion made of a second resin material having a low hardness are provided along a circumferential direction around a central axis of the connecting pin, a main body shaft formed of the first resin material and arranged coaxially with the central axis line; A filling recess is formed on an outer circumferential surface of the main shaft, the filling recess being recessed radially inward, The filling recess is filled with a soft member made of the second resin material, a relief recess recessed toward the inside in the radial direction is formed on the outer circumferential surface of the main shaft at a peripheral edge of an opening of the filling recess, the hard portion of the sliding portion is at least a part of a portion of an outer circumferential surface of the main shaft where the filling recess and the relief recess are not formed, A connecting pin, wherein the soft portion of the sliding portion is at least a part of an outer circumferential surface of the soft member.

2. The connecting pin according to claim 1 , wherein the filling recess, the soft member, and the relief recess are provided at least one on each side of the central axis in a radial direction.

3. The connecting pin according to claim 1 or 2, wherein the soft portion has a protruding portion formed on at least a portion in a circumferential direction, the protruding portion protruding radially outward from the hard portion.

4. The first resin material is a polyester-based resin, The connecting pin according to claim 1 or 2, wherein the second resin material is an elastomer resin.

5. A compact container comprising the connecting pin according to claim 1 or 2, the flat container body, and the lid.

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