JP2011064293A - Cushion clip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cushion clip having a long stroke without enlarging its size and obtaining required resilience without bending in the middle. <P>SOLUTION: The cushion clip 10 is formed by integrating an impact absorbing cushion part 20 for absorbing impact with a locking part 40 for locking to a mounting hole. The cushion part 20 is formed in hollow shape including a bottom part 24 and a sidewall part 22, and an outside wall 26 of the sidewall part 22 is formed in conical shape reduced in diameter from the bottom side toward the tip. The distal end of the cushion part 20 is provided with a circular open hole 25 at the center, and a hollow part 32 surrounded by the upper face of the bottom part 24 and the inside wall 28 of the sidewall part 22 is formed below the open hole 25 of the cushion part 20. The wall thickness of the sidewall part 22 is thinnest at the center part in the height direction and becomes thicker toward the distal end and both ends on the bottom side. The hollow part 32 is formed in barrel shape. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cushion clip. Specifically, it is locked to the mounting hole formed in either the fixed member or the movable member, and is located between the fixed member and the movable member to absorb the impact when the movable member approaches the fixed member. It relates to a cushion clip.

  This type of cushion clip includes a structure in which a cushion portion that absorbs an impact and an engaging portion that is engaged with an attachment hole formed in a fixed member or a movable member are integrated. And in the cushion clip of this structure, the cushion part is formed in the hollow substantially cylindrical shape with the soft resin material, and when the movable member approaches the fixed member, the cushion part of the cushion clip is located between the fixed member and the movable member. It is compressed by elastic deformation and absorbs impact.

  As a prior art, Japanese Patent Laying-Open No. 2006-153083 (Patent Document 1) describes a cushion clip in which a cushion portion is hollow and a convex portion is formed at the bottom of the cushion portion. Japanese Unexamined Patent Application Publication No. 2007-225093 (Patent Document 2) describes a cushion clip in which the side wall of the cushion portion is bellows and a protrusion is formed on the bottom portion of the cushion portion.

  FIG. 7 shows a front view with a partial cross section of a cushion clip 101 having substantially the same configuration as the cushion clip described in Patent Document 1. FIG. The cushion clip 101 includes a cushion portion 110 that absorbs an impact, and a locking portion 120 for attaching the cushion portion 110 to a fixing member. The cushion portion 110 is formed of a soft material having elasticity, and the locking portion. 120 is formed of a hard material having a predetermined rigidity. And the external shape of the side wall part 112 of the cushion part 110 is made into the substantially cone shape, the cavity part 140 is formed in the inside of the cushion part 110, and the side wall 180 of the cavity part 140 is made substantially perpendicular | vertical. The cavity 140 is provided with a substantially circular opening 160 that opens toward the tip, and the base of the cavity 140 is provided with a protrusion 190 that protrudes toward the tip. .

Incidentally, the cushion clip 101 described in Patent Document 1 is for absorbing an impact when closing a lid of a grab box which is an automobile part. And the cushion clip used for a grab box has the following role.
(1) Prevent the grab door from vibrating due to the shaking of the car during driving.
(2) Even when the grab door is strongly pressed with a hand or elbow, the door and the box are prevented from directly hitting, and the generation of abnormal noise and the damage of the grab door and the grab box are prevented.
(3) The grab door can be opened and closed by absorbing variations in the construction of the grab door and rattling by the locking mechanism.
(4) Even when the cushion clip is visible when the grab door is opened, the size and shape are not uncomfortable.

Therefore, in order to play the above-described roles, the cushion clip used in the grab box needs to have the following characteristics.
(1) When the grab door is closed, there is a sufficient reaction force that can withstand vibration.
(2) A large reaction force is generated when a large load is input.
(3) Change in reaction force due to change in compression is small so that the required reaction force can be obtained in any installation.
(4) It is small and not distorted.
If this characteristic cannot be satisfied, problems such as the vibration of the grab door and the generation of abnormal noise or the closure of the grab door may occur.

Therefore, this type of cushion clip is required to have the following characteristics regarding the relationship between the reaction force load and the compression amount.
(1) In the initial stage of compression, the reaction force per compression amount must be increased so that the necessary reaction force can be obtained early.
(2) The increase in the reaction force per compression amount can be suppressed in the middle of compression after the necessary reaction force is obtained.
(3) In the latter half of the compression period after a large compression width is obtained, increase the reaction force increase amount per compression amount.
FIG. 8 shows the relationship between the reaction force load and the compression amount described above as an ideal load line. The reaction force load at the point b in FIG. 8 indicates the minimum reaction force load, and has a size capable of suppressing the generation of abnormal noise due to vibration of the grab door due to the shaking of the vehicle. The reaction force load at the point e in FIG. 8 indicates the maximum reaction force load, and the grab door cannot be unlocked and does not open. If the reaction force of the cushion clip increases beyond the maximum reaction force load, the friction of the pin that locks the grab door will not increase, and the grab door will not open unless the door knob of the grab door is pulled with a large force.
The range between the minimum reaction force load at the point b and the maximum reaction force load at the point e is a range of a load to be used. In the following description, the amount of compression between the lowest reaction force load and the highest reaction force load is referred to as a cushion clip stroke.

JP 2006-153083 A JP 2007-225093 A

  Incidentally, since the cushion clip 101 described in Patent Document 1 has a mechanism for obtaining a reaction force by compressing the side wall portion 112 and the convex portion 190, the reaction force increases as an integral value as the amount of compression increases. For this reason, there is a large increase in the reaction force per compression amount, the compression amount in the middle of compression is about half of the ideal load line, and there is a problem that the range of response to variations in door installation is narrow. Then, if further compression is attempted beyond the middle stage of compression, the side wall of the cushion part interferes with the convex part at the bottom, and the reaction load increases, making compression difficult. In addition, the cushion clip described in Patent Document 2 also has a compression amount in the middle of compression of the load curve that is about half of the ideal load curve, and the bellows on the side wall of the cushion part hit each other by compression in the middle of compression, and an adhesive sound is generated. If the amount of compression is further increased, the side wall interferes with the bottom column and the compression load increases, making compression difficult.

Therefore, in order to secure the stroke, if the length of the cylindrical side wall of the conventional cushion clip is extended to make the cushion part a vertically long shape, the balance of the cushion part is lost during compression, and the cushion part is in the middle. It bends into a letter. Therefore, the impact cannot be absorbed because it cannot be compressed in the longitudinal direction to the end and a necessary repulsive force cannot be obtained.
And in order to keep the balance of the cushion part, the diameter of the bottom part of the cushion part as well as the length of the cushion part must be increased to enlarge the entire cushion clip, and the cushion clip mounting space is widened. It is necessary to take. However, it may be difficult to take a large space for mounting the cushion clip due to design restrictions. Further, when the cushion clip is enlarged, the appearance is not good.

  Therefore, the problem to be solved by the present invention is to provide a cushion clip that has a long stroke and can provide a necessary repulsive force without bending in the middle, regardless of the size of the cushion clip.

In order to solve the above problems, the cushion clip according to the present invention takes the following means.
First, the first invention of the present invention is locked to an attachment hole formed in one of the fixed member and the movable member, is located between the fixed member and the movable member, and approaches the fixed member. A cushion clip that absorbs the impact by receiving the movement of the movable member,
The cushion part that absorbs the impact and the locking part for locking to the mounting hole are integrated.
The cushion portion has a hollow shape having a bottom portion and a side wall portion, the outer wall of the side wall portion is linear in the height direction, and a circular opening hole is provided in the center at the tip of the cushion portion. The thickness of the side wall portion of the cushion portion is thin at the center in the height direction and becomes thicker toward both ends on the tip and bottom sides, and the hollow portion has a barrel shape.

According to the first aspect of the invention, since the central portion of the side wall portion in the height direction is thinnest and easily bent, the central portion of the cushion portion is compressed and protrudes outward in the initial compression stage. And since the outer wall is linear in the compression direction and becomes thicker toward the tip and bottom, the side wall is stretched without being bent in the compression direction, and an initial load of compression rises. When the load further increases, the cushion portion is compressed while being bent so that the central portion in the height direction projects outward, and the reaction load is slightly increased to increase the amount of compression. Here, the cushion part is thinnest at the center in the height direction and is most flexible, so it bends from the center part in the height direction. And a predetermined repulsive force is obtained. Therefore, it is possible to provide a cushion clip that has a long stroke and can obtain a necessary repulsive force without being bent in the middle, regardless of the size of the cushion clip.

Next, a second invention of the present invention is a cushion clip according to the first invention,
The cushion portion is formed of a soft resin material, the locking portion is formed of a hard resin material, and the cushion portion and the locking portion are integrated.
According to the second aspect of the invention, since the cushion portion is formed of a soft resin material, it is suitable for absorbing an impact and elastically deforming, and the locking portion is formed of a hard resin material. Therefore, the locking to the mounting hole is stable.

According to each invention of the present invention described above, the following effects can be obtained.
First, according to the first invention described above, the cushion portion has the thinnest central portion in the height direction, and when compressed, the cushion portion bends from the central portion in the height direction which is thin and easily bent. It does not break and bend and is compressed in the vertical direction stably. Therefore, it is possible to provide a cushion clip that has a long stroke and can obtain a necessary repulsive force without being bent in the middle, regardless of the size of the cushion clip.
Next, according to the second invention described above, since the cushion portion is formed of a soft resin material, it is suitable for absorbing an impact and elastically deforming, and the locking portion is formed of a hard resin material. Therefore, locking to the mounting hole is stable.

It is an external appearance perspective view of the cushion clip in one Example. It is a longitudinal cross-sectional view of the cushion clip in one Example. It is a longitudinal cross-sectional view which shows the deformation | transformation state in the compression initial stage of the cushion clip in one Example. It is a longitudinal cross-sectional view which shows the deformation | transformation state in the initial stage of the compression middle stage of the cushion clip in one Example. It is a longitudinal cross-sectional view which shows the deformation | transformation state in the compression middle stage of the cushion clip in one Example. It is a longitudinal cross-sectional view which shows the deformation | transformation state in the final stage of the compression middle stage of the cushion clip in one Example. It is a front view by the partial cross section of the cushion clip by a prior art. It is a figure which shows the ideal load line of a cushion clip with a large stroke amount.

Hereinafter, modes for carrying out the present invention will be described according to examples.
FIG. 1 shows an external perspective view of a cushion clip 10 according to an embodiment of the present invention. The cushion clip 10 is locked to a mounting hole 52 (see FIG. 3) formed in the box body 50 (see FIG. 3) of the grab box of the automobile, and the box body 50 and the door 54 (see FIG. 3) of the grab box. It is a cushion clip which absorbs the impact when it closes and the door 54 is closed. And the cushion part 20 which absorbs an impact, and the latching | locking part 40 latched by the attachment hole 52 are set as the structure integrated. The box body 50 corresponds to the fixed member of the present invention, and the door 54 corresponds to the movable member of the present invention.

FIG. 2 shows a longitudinal sectional view of the cushion clip 10. The cushion portion 20 of the cushion clip 10 has a hollow shape including a bottom portion 24 and a side wall portion 22, and an outer wall 26 of the side wall portion 22 has a conical shape whose diameter decreases from the bottom side toward the tip. A circular opening hole 25 is provided at the center of the tip of the cushion part 20, and a hollow surrounded by the upper surface of the bottom part 24 and the inner wall 28 of the side wall part 22 is provided below the opening hole 25 of the cushion part 20. A portion 32 is formed. As shown in FIGS. 1 and 2, the side wall portion 22 is formed with an air vent hole 23 communicating with the inside and outside at a location close to the bottom portion 24. Note that the air vent hole 23 is configured not to affect the deformation characteristics of the cushion portion 20.
And the thickness of the side wall part 22 is the thinnest in the center part of the height direction, and it is set as the structure which becomes so thick that it goes to the both ends of a front-end | tip and a bottom part side, and the hollow part 32 is made into the barrel shape.

As shown in FIG. 2, the locking portion 40 of the cushion clip 10 includes a disc-shaped base portion 42 embedded in the bottom portion 24 of the cushion portion 20, and a mounting hole 52 of the box body 50 (see FIG. 3) protruding downward. And a locking leg 44 to be inserted (see FIG. 3).
The cushion portion 20 is made of elastomer, the locking portion 40 is made of polypropylene, and the cushion portion 20 and the locking portion 40 are integrated by two-color molding.

The longitudinal cross-sectional view showing the deformation | transformation state of the cushion clip 10 attached to the box main body 50 to FIGS. 3-6 is shown.
FIG. 3 shows a deformed state corresponding to a point between points a and b in FIG. 8 at the initial stage of compression immediately after the door 54 hits the cushion part 20 and starts compression of the cushion part 20. At this stage, the outer wall 26 of the side wall portion 22 is deformed and stretched from a linear shape to an arc shape in the compression direction, and the reaction force load rises in a state substantially proportional to the amount of compression. At this time, the deformation of the thin portion at the central portion in the height direction of the side wall portion 22 is the largest.

  FIG. 4 shows a state where the initial stage of compression is finished and the lower side of the side wall portion 22 of the cushion portion 20 is deformed into a cylindrical shape. It is a deformation | transformation state corresponding between the point b and c point of FIG. The side wall portion 22 of the cushion clip 10 of the cushion clip 10 has a conical shape in which the outer wall 26 is reduced in diameter toward the upper side. It is configured to become thicker as it goes to both ends. Therefore, the cushion part 20 is most easily bent at the center part in the height direction of the side wall part 22. Therefore, after the load in the initial stage of compression rises due to the stretching of the side wall part 22, the central part in the height direction of the side wall part 22 projects outward in the initial stage of the middle stage of compression. The upper part of the cushion part 20 is slightly enlarged to maintain a substantially conical shape, and the lower part of the side wall part 22 is compressed because the outer wall 26 is linear in the compression direction and becomes thicker downward. It is stretched without bending in the direction, and the lower side of the side wall portion 22 projects outward, and deforms into a cylindrical shape with a slightly reduced diameter toward the lower side.

FIG. 5 shows a deformed state of the cushion portion 20 in a state in which the door 54 is closed and a lock mechanism (not shown) is operated and the door 54 is locked to the box body 50. This is a deformed state corresponding to the point between points c and d in FIG.
When the load further increases from the state shown in FIG. 4, the central portion of the side wall portion 22 protrudes further to the outside than the lower side of the side wall portion 22 protruding in a cylindrical shape, and the deformation of the cushion portion 20 is bent from compression. To change. Then, the amount of compression of the cushion portion 20 increases while the reaction force load slightly increases. Here, in the cushion clip 10, there is no obstacle such as a protrusion in the hollow portion 32 inside the cushion portion 20, so the side wall portion 22 is deformed due to the bending characteristics until the side wall portion 22 hits the bottom portion 24 of the cushion portion 20, and the reaction load is increased. It does not increase rapidly. Then, the compression of the cushion portion 20 proceeds with the reaction load slightly increased, and the door 54 is locked in the state shown in FIG. 5 before the side wall portion 22 hits the bottom portion 24.

  When the door 54 is further pushed while the door 54 is locked, the top 30 of the cushion portion 20 comes into contact with the bottom 24 of the cushion portion 20 as shown in FIG. FIG. 6 shows a deformed state at the final stage of the middle stage of compression, which is a deformed state corresponding to the point e in FIG. If further compression is attempted from the state shown in FIG. 6, the deformation due to the bending characteristic changes to the deformation due to the compression characteristic, so that the reaction force load increases rapidly.

According to the above-described embodiment, the cushion portion 20 is stretched in the initial stage of compression, and in the middle stage of compression, the bending portion is bent and the central portion in the height direction projects outward and bends. Further, it is possible to provide a cushion clip having a long stroke and capable of obtaining a necessary repulsive force without bending in the middle.
Since the cushion part is made of elastomer, it is soft and suitable for elastically deforming by absorbing impact, and the locking part is made of polypropylene and has high rigidity, and the engagement to the mounting hole. The stop is stable. And since the cushion part and the latching | locking part are integrated by 2 color molding, the coupling | bonding of a cushion part and a latching | locking part is firm, the integrated structure is stable, and handling is easy.

In the above-described embodiment, the outer wall of the side wall portion of the cushion portion, which is linear in the height direction, has a conical shape with a diameter decreasing from the bottom toward the tip, but the outer wall of the side wall portion of the cushion portion is A cylindrical shape with a constant diameter from the bottom to the tip may be used.
In this case, as in the embodiment, the thickness is the thinnest at the center in the height direction of the side wall, and the thickness increases toward both ends on the front and bottom sides. Therefore, the cushion part is most easily bent at the center part in the height direction of the side wall part. Further, in the initial compression state, the outer wall of the side wall portion is straight in the compression direction, and thus stretches without being bent in the compression direction. Therefore, the central portion in the height direction protrudes outward, the upper portion is deformed into a conical shape, and the lower portion is deformed into an inverted conical shape, so that the reaction force load rises. When the load further increases, the deformation of the central portion of the side wall portion changes from compression to bending. The compression of the cushion portion proceeds while the reaction force load slightly increases, and the same compression characteristics as in the embodiment can be obtained.

In the above embodiment, the cushion portion is formed of elastomer, the locking portion is formed of polypropylene, and the cushion portion and the locking portion are integrated by two-color molding. The method for integrating the cushion portion and the locking portion is not limited to this.
The cushion portion may be formed of rubber or a soft resin material, the locking portion may be formed of a hard resin material such as polyacetal, and the cushion portion and the locking portion may be integrated by multicolor molding or insert molding.
Further, the cushion portion and the locking portion may be formed by one-color molding using a soft resin material such as rubber or elastomer. If one-color molding is used, the manufacturing process is simplified, and the cost of a mold or the like can be reduced.
In addition, the cushion clip according to the present invention can be implemented in various forms within the scope of the idea of the invention.

DESCRIPTION OF SYMBOLS 10 Cushion clip 20 Cushion part 22 Side wall part 23 Air vent hole 24 Bottom part 25 Open hole 26 Outer side wall 28 Inner side wall 32 Hollow part 40 Locking part 42 Base 44 Locking leg 50 Box main body (fixing member)
52 Mounting hole 54 Door (movable member)

Claims (2)

Locked against the mounting hole formed in either the fixed member or the movable member, and positioned between the fixed member and the movable member, absorbs the impact by receiving the movement of the movable member approaching the fixed member. A cushion clip that
The cushion part that absorbs the impact and the locking part for locking to the mounting hole are integrated.
The cushion portion has a hollow shape having a bottom portion and a side wall portion, the outer wall of the side wall portion is linear in the height direction, and a circular opening hole is provided in the center at the tip of the cushion portion. A cushion clip in which the thickness of the side wall portion of the cushion portion is thin at the center portion in the height direction and becomes thicker toward both ends on the tip and bottom sides, and the hollow portion is formed into a barrel shape. The cushion clip according to claim 1,
The cushion part is formed of a soft resin material, the locking part is formed of a hard resin material, and the cushion part is integrated with the locking part.

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