JP2005048891A - Locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device capable of securely preventing a claw from coming off a claw receiver when there is no intention to release the engagement of the claw and the claw receiver. <P>SOLUTION: This locking device 10 has the elastically deformable claw 20, the claw receiver 30 engaged with the claw 20 by deforming and restoring the claw 20, and an elastic stopper 40 which can be elastically deformed in the direction crossing the direction in which the claw 20 is deformed orthogonally, is pushed away by the claw 20 when the claw 20 is engaged with the claw receiver 30, and returns onto a rear face side of the claw 20 when the claw 20 is engaged with the claw receiver 30 to prevent the claw 20 from deforming onto the rear face side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a locking device in which a claw engages with a claw receiver using resin elasticity.

  A conventional locking device is disclosed in, for example, Japanese Patent Laid-Open No. 9-2110019.

  The locking device disclosed in the above publication has a claw 1 and a claw receiver 2 as shown in FIG. The claw 1 is engaged with the claw receiver 2 by being deformed and restored. Therefore, when the nail 1 is engaged with the nail receiver 2, the nail 1 and the nail 1 are deformed in the same direction as the direction in which the nail 1 is deformed and restored, and in the direction away from the nail receiver 2. The engagement with the receiver 2 can be released.

  However, when the nail 1 and the nail receiver 2 are engaged, if a force in the A direction is applied to the nail 1 or a force in the B direction is applied to the nail receiver 2, the engagement between the nail 1 and the nail receiver 2 There is a possibility that the nail 1 is deformed in a direction to be detached from the nail receiver 2 and the nail 1 is detached from the nail receiver 2 even though there is no intention to release the joint.

  In order to prevent the claw 1 from being detached from the claw receiver 2, as shown in FIG. 8, the angle α (alpha) between the locking surface 1a of the claw 1 and the locking surface 2a of the claw receiver 2 is made an acute angle. However, when a large force in the A direction is applied to the nail 1 or a large force in the B direction is applied to the nail receiver 2, the nail 1 is deformed in a direction away from the nail receiver 2 and the nail 1 is detached from the nail receiver 2. There is a fear.

In addition, as shown in FIG. 7, the protective wall 3 is provided in the locking device disclosed in Japanese Patent Laid-Open No. 9-2110019. However, the protective wall 3 prevents the claw 1 from being deformed excessively. It is provided to prevent this, and is not provided to prevent disengagement between the claw 1 and the claw receiver 2. Therefore, even if the protective wall 3 is provided, the nail 1 is detached from the nail receiver 2 when a force in the A direction is applied to the nail 1 or a force in the B direction is applied to the nail receiver 2.
JP 9-2100119

  The problem to be solved by the present invention is that the nail is detached from the nail receiver, even though there is no intention to release the engagement between the nail and the nail holder.

  An object of the present invention is to provide a locking device that can reliably prevent the claw from being detached from the claw holder when there is no intention to release the engagement between the claw and the claw holder.

The present invention for achieving the above object is as follows.
(1) an elastically deformable nail;
A claw receiver that engages when the claw is deformed and restored;
The claw is elastically deformable in a direction perpendicular to the direction in which the claw is deformed, and is pushed away by the claw when the claw engages with the claw receptacle, and when the claw engages with the claw receptacle An elastic stopper that returns to the back side and prevents the claw from deforming to the back side;
A locking device having:
(2) The elastic stopper has a bulging portion that bulges in the deformation direction of the elastic stopper, and can be brought into contact with the claw at a side end surface of the bulging portion. Locking device.
(3) The locking device according to (1), wherein the elastic stopper is deformable in a diameter-changing direction of the elastic stopper by providing a slit in a member provided with the elastic stopper.

  In the locking devices of the above (1) to (3), when the nail is engaged with the nail receiver, the nail is pushed away, and when the nail is engaged with the nail receiver, the nail returns to the back side of the nail and the nail is Since the elastic stopper that prevents deformation to the side is provided, even if a force is applied to the nail or the nail holder or the member on which the nail is provided, the nail will hit the elastic stopper and the nail Will not come off the nail holder. Therefore, when there is no intention to release the engagement between the claw and the claw holder, it is possible to reliably prevent the claw from coming off from the claw holder.

  In the locking device of the above (2), since the elastic stopper has the bulging portion and can be brought into contact with the claw on the side end surface of the bulging portion, the elastic stopper is moved from the normal position to the elastic stopper. Even in the case of slight deviation in the deformation direction, the elastic stopper can reliably contact the claw.

  In the locking device of the above (3), the elastic stopper can be provided without newly providing a separate part.

  A locking device according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the locking device 10 according to the embodiment of the present invention includes an elastically deformable claw 20, a claw receiver 30 to which the claw 20 is engaged when the claw 20 is deformed and restored, and a deformation of the claw 20. And an elastic stopper 40 that is elastically deformable in a direction orthogonal to the direction. Hereinafter, in the embodiment of the present invention and the illustrated example, the direction in which the claw 20 is deformed is the left-right direction, the direction in which the elastic stopper 40 is deformed is the front-back direction, and the direction orthogonal to the left-right direction and the front-back direction is the up-down direction.

  The nail | claw 20 is resin. The claw 20 extends upward from a first member (for example, a housing) 50 on which the claw 20 is provided. The claw 20 may be formed integrally with the first member 50, or may be formed separately from the first member 50 and fixedly attached to the first member 50. The claw 20 has a plate-like portion 21 and a protruding portion 22.

  The plate thickness of the plate-like portion 21 is small. Since the plate-like portion 21 has a small thickness in the left-right direction, the claw 20 can be easily elastically deformed (bent) in the left-right direction with respect to the first member 50. The nail | claw 20 hardly bends in the front-back direction. The plane orthogonal direction of at least the upper end portion of the right side surface of the plate-like portion 21 is parallel to the left-right direction.

  The protrusion 22 is provided on the upper end portion of the plate-like portion 21. The protruding portion 22 protrudes leftward from the plate-like portion 21. The protrusion 22 may be formed integrally with the plate-like portion 21, or may be formed separately from the plate-like portion 21 and fixedly attached to the plate-like portion 21. The upper surface 22 a of the protrusion 22 is an inclined surface that is inclined leftward and downward from the plate-like portion 21. The lower surface 22b of the protrusion 22 is a surface that is orthogonal or substantially orthogonal to the vertical direction.

  A part of the upper surface of the plate-like portion 21 and a part of the upper surface of the protrusion 22 are inclined surfaces that are inclined backward and downward (hereinafter, this surface is referred to as an elastic stopper pressing surface 20a).

  The claw receiver 30 is made of resin. The claw receiver 30 protrudes forward from a second member (for example, a cover) 60 provided with the claw receiver 30. The claw receiver 30 may be formed integrally with the second member 60, or may be formed separately from the second member 60 and fixedly attached to the second member 60.

  The upper surface 31 of the claw receiver 30 is a surface that is orthogonal or substantially orthogonal to the vertical direction. The upper surface 31 can be engaged with the lower surface 22 b of the protrusion 22 of the claw 20.

  The lower surface 32 of the claw receiver 30 is an inclined surface that is inclined rightward and upward. The lower surface 32 of the claw receiver 30 is an inclined surface that is inclined in the same direction as the upper surface 22 a of the protrusion 22 of the claw 20.

  The elastic stopper 40 is made of resin. The elastic stopper 40 is provided on the second member 60. The elastic stopper 40 may be formed integrally with the second member 60, or may be formed separately from the second member 60 and fixedly attached to the second member 60. The elastic stopper 40 is provided on the right side in the left-right direction from the claw receiver 30.

  The elastic stopper 40 can be elastically deformed (flexed) in the front-rear direction. As shown in FIG. 2, the elastic stopper 40 can be elastically deformed in the front-rear direction by providing a slit 61 in the second member 60. As shown in FIGS. 1 to 3, the elastic stopper 40 may be elastically deformable in the front-rear direction by providing a U-shaped slit 61a that opens downward, as shown in FIG. As shown in FIG. 4, it may be made elastically deformable in the front-rear direction by providing a U-shaped slit 61b that opens upward. (C) As shown in FIG. It may be made elastically deformable in the front-rear direction by providing two parallel slits 61c to be opened. (D) As shown in FIG. 6, a U-shaped slit 61d that is opened in the right direction is provided. And may be elastically deformable in the front-rear direction. Hereinafter, in the embodiment of the present invention, as shown in FIGS. 1 to 3, the elastic stopper 40 can be elastically deformed in the front-rear direction by providing the second member 60 with a U-shaped slit 61a that opens downward. An example will be described.

  As shown in FIG. 1, the elastic stopper 40 includes a plate-like portion 41 and a bulging portion 42.

  The plate thickness in the front-rear direction of the plate-like portion 41 is small. Since the plate-like portion 41 has a small thickness in the front-rear direction, the elastic stopper 40 can be easily elastically deformed in the front-rear direction with respect to the second member 60. The force required to deform the elastic stopper 40 in the front-rear direction is smaller than the force required to deform the claw 20 in the front-rear direction. The elastic stopper 40 hardly bends in the left-right direction. The force required to deform the elastic stopper 40 in the left-right direction is greater than the force required to deform the claw 20 in the left-right direction.

  The bulging portion 42 is provided at the upper end portion of the plate-like portion 41. The bulging portion 42 is a portion protruding forward from the plate-like portion 41. The bulging portion 42 may be formed integrally with the plate-like portion 41, or may be formed separately from the plate-like portion 41 and fixedly attached to the plate-like portion 41. The bulging portion 42 extends in the left-right direction. The bulging portion 42 is provided on the entire left and right direction (of the plate-like portion 41) of the elastic stopper 40.

  The lower surface 42a of the bulging portion 42 is an inclined surface that is inclined backward and downward. The lower surface 42 a of the bulging portion 42 is an inclined surface that is inclined in the same direction as the elastic stopper pressing surface 20 a of the claw 20.

  An end face (side end face) 42 b on the left side of the bulging portion 42 is located on the right side in the left-right direction (the back side of the claw 20) with respect to the claw 20 when the claw 20 is engaged with the claw receiver 30. As shown in FIG. 2, when the claw 20 is engaged with the claw receiver 30, the overlapping amount (wrap amount) of the claw 20 and the claw receiver 30 in the left-right direction is S 1, and the claw 20 and the elastic stopper 40 are S1> (S2 + S3) is satisfied, where S2 is the distance in the left-right direction, and S3 is the distance in the left-right direction of the slit 61a between the right end surface 42c of the elastic stopper 40 and the second member 60.

  Next, the operation of the embodiment of the present invention will be described.

  First, an operation when the claw 20 is engaged with the claw receiver 30 will be described.

  When the nail 20 is moved upward with respect to the nail receiver 30, the upper surface 22 a of the protrusion 22 of the nail 20 contacts the lower surface 32 of the nail receiver 30. After the protrusion 22 hits the nail receiver 30, when the nail 20 is further moved upward, the upper surface 22a of the protrusion 22 and the lower surface 32 of the nail receiver 30 are inclined surfaces. And the claw 20 is deformed in the right direction. When the claw 20 is further moved upward, the elastic stopper pressing surface 20a hits the lower surface 42a of the bulging portion 42 of the elastic stopper 40 while the claw 20 is deformed rightward. When the claw 20 is further moved upward, the elastic stopper pushing surface 20a and the lower surface 42a of the bulging portion 42 are inclined surfaces, so that the elastic stopper 40 is pushed by the claw 20 and the elastic stopper 40 is deformed backward. (The elastic stopper 40 is pushed away by the claw 20).

  Furthermore, when the nail | claw 20 is moved to the upper direction and the projection part 22 gets over the nail | claw receptacle 30, the nail | claw 20 will be decompress | restored in the left direction by resin elasticity. When the claw 20 is restored in the left direction, the claw 20 is engaged with the claw receiver 30. Further, when the claw 20 is restored in the left direction, the elastic stopper pushing surface 20a of the claw 20 is not in contact with the lower surface 42a of the elastic stopper 40, and the elastic stopper 40 is restored in the forward direction by resin elasticity. At this time, the left end surface 42 b of the bulging portion 42 of the elastic stopper 40 is located on the right side in the left-right direction with respect to the claw 20 at a position overlapping with the front-rear direction position of the claw 20 in the front-rear direction. When the claw 20 is restored in the left direction, the claw 20 is sandwiched between the claw receiver 30 and the elastic stopper 40 in the left-right direction.

  Next, when the claw 20 is engaged with the claw receiver 30, a downward force is applied to the claw 20 or the first member 50, or an upward force is applied to the claw receiver 30 or the second member 60. Explain when it took.

  At this time, the nail | claw 20 deform | transforms rightward (the nail | claw 20 deform | transforms in the direction which remove | deviates from the nail receptacle 30). However, since the bulging portion 42 of the elastic stopper 40 is located on the right side of the claw 20, even if the claw 20 is deformed in a direction to be detached from the claw receiver 30, The right side surface (rear surface) of the direction hits the end surface 42 b on the left side of the bulging portion 42. Therefore, it is possible to prevent the nail 20 from being detached from the nail receiver 30.

  Further, when the claw 20 or the first member 50 is subjected to a large downward force or the claw receiver 30 or the second member 60 is subjected to a large upward force, the elastic stopper 40 is moved to the right by the claw 20. Even if the elastic stopper 40 is pushed in the right direction and deforms in the right direction (even if a large force is applied so that the elastic stopper 40 is deformed in the right direction), the right end surface 42c of the elastic stopper 40 is the second. Since it hits the member 60, it is deformed only in S3. Since S1> S2 + S3, it is possible to prevent the claw 20 from being detached from the claw receiver 30 even when a large force is applied to the elastic stopper 40 to the right.

  Next, a case where the claw 20 engaged with the claw receiver 30 is removed from the claw receiver 30 will be described.

  While the elastic stopper 40 is elastically deformed in the backward direction, the claw 20 is elastically deformed in the right direction until the engagement with the claw receiver 30 is released. In this state, the engagement between the claw 20 and the claw receiver 30 can be released by moving the claw 20 downward with respect to the claw receiver 30.

  The operation and effect of the embodiment of the present invention will be described.

  When the nail 20 is engaged with the nail receiver 30, the nail 20 is pushed away, and when the nail 20 is engaged with the nail receiver 30, the nail 20 returns to the right side (rear side) in the left-right direction and the nail 20 moves in the right direction ( Since the elastic stopper 40 is provided to prevent deformation on the back side), even if the nail 20 or the nail receiver 30 is subjected to a vertical force and the nail 20 is likely to be detached from the nail holder 30, the nail 20 Does not hit the elastic stopper 40 and the claw 20 does not come off the claw receiver 30. Therefore, it is possible to prevent the claw 20 from coming off the claw receiver 30 when there is no intention to release the engagement between the claw 20 and the claw receiver 30.

  Even when a large force is applied so that the elastic stopper 40 is deformed in the right direction, the end face 42c on the right direction side of the elastic stopper 40 hits the second member 60 and the elastic stopper 40 is further deformed in the right direction. Therefore, the nail 20 can be prevented from coming off from the nail receiver 30.

  Further, since the elastic stopper 40 has a bulging portion 42 that bulges forward in the entire left and right direction of the elastic stopper 40, even if the elastic stopper 40 slightly deviates in the front-rear direction from the normal position, the bulging portion The end surface 42 b on the left side of 42 can reliably contact the claw 20, and the end surface 42 c on the right side of the bulging portion 42 can securely contact the second member 60.

  Further, since the elastic stopper 40 is elastically deformable in the front-rear direction by providing the slit 61 in the second member 60, when the elastic stopper 40 is formed integrally with the member 60, it is newly added. The elastic stopper 40 can be provided without increasing the number of parts.

  Further, when the claw 20 is engaged with the claw receiver 30, the claw 20 can be engaged with the claw receiver 30 while the elastic stopper 40 is pushed backward only by moving the claw 20 upward. Even if the claw 20 is provided, the engagement between the claw 20 and the claw receiver 30 is easy. Further, when removing the claw 20 from the claw receiver 30, two actions are required because the claw 20 is elastically deformed in the right direction while elastically deforming the elastic stopper 40 in the rear direction, and the engagement is not easily released.

It is a perspective view when the nail | claw is not engaging with the nail | claw receptacle of the latching device of this invention Example and its vicinity. It is a perspective view when a nail | claw is engaging with the nail | claw receptacle of the latching apparatus of this invention Example and its vicinity. It is a front view which shows the elastic stopper and the vicinity which show the case where it can be elastically deformed by providing the U-shaped slit which the elastic stopper of this invention Example opens downward. It is a front view which shows the elastic stopper and the vicinity which show the case where the elastic stopper of this invention Example is made elastically deformable by providing the U-shaped slit which opens upwards. It is a front view which shows the case where the elastic stopper of this invention Example is elastically deformable by providing two parallel slits open | released to the up-down both directions, and its vicinity. It is a front view which shows the case where the elastic stopper of this invention Example is elastically deformable by providing the U-shaped slit opened to the right direction, and its vicinity. It is sectional drawing which shows the conventional latching device and its vicinity. It is sectional drawing at the time of making the angle of the latching surface of a nail | claw and the latching surface of a nail | claw holder of the conventional latching device and its vicinity into an acute angle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Locking device 20 Claw 21 Claw plate-like part 22 Projection part 30 Claw receiver 40 Elastic stopper 41 Elastic stopper plate-like part 42 Swelling part 50 First member 60 Second member 61 61a, 61b, 61c, 61d slit

Claims (3)

An elastically deformable nail,
A claw receiver with which the claw engages when the claw is deformed and restored;
The claw is elastically deformable in a direction perpendicular to the direction in which the claw is deformed, and is pushed away by the claw when the claw engages with the claw receptacle, and when the claw engages with the claw receptacle An elastic stopper that returns to the back side and prevents the claw from deforming to the back side;
A locking device having:   The latch according to claim 1, wherein the elastic stopper has a bulging portion that bulges in a deformation direction of the elastic stopper, and is capable of coming into contact with the claw at a side end surface of the bulging portion. apparatus.   The locking device according to claim 1, wherein the elastic stopper can be deformed in a deformation direction of the elastic stopper by providing a slit in a member provided with the elastic stopper.

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