JPH09245547A - Lock release mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock release mechanism in which the wall fixing state lock of a wire support member such as a grommet and the like can be easily released. SOLUTION: A U-shaped engaging piece 13 is provided in a wire support member 1 such as a grommet and the like, and a lock pawl 14 is provided at the tip of the engaging pawl 13 which is engaged with the peripheral wall of a partition wall 2. A rib 15 is provided inside the diameter of the lock pawl 14, and the rib 15 is inserted into the notch 16 of the engaging piece 13. By just pushing up the rib 15, the lock of the lock pawl 14 can be released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock releasing mechanism suitable for being applied to an electric wire supporting member such as a grommet or a harness stopping clip.

[0002]

2. Description of the Related Art For example, in an automobile, it is necessary to pass an electric wire through a partition wall between the outside and the inside of the vehicle,
In such a case, it is necessary to waterproof it. Therefore, for example, a grommet disclosed in Japanese Utility Model Laid-Open No. 5-48139 is fixed to a hole of a partition wall by a flexible claw. Such a grommet also has a function of protecting the electric wire from the edge portion of the hole of the partition wall. In addition, actual fairness 7-
Also in the wire harness stop clip described in Japanese Patent No. 5287, it is necessary to fix the clip in a hole such as an inner wall of an automobile, and a flexible claw is used.

Here, taking the grommet of Japanese Utility Model Laid-Open No. 5-48139 as an example, FIG. 8 shows a case where the electric wire 101 is pierced by the grommet 103 with respect to the partition wall 100 for wiring. Grommet 103 is an electric wire 1
01 is fixed and a grommet main body 104 for suppressing invasion of water along the electric wire 101 and a cylindrical inner base portion 105 to be inserted into the through hole 102 are provided.
A locking piece 106 extending toward the partition wall 100 side is provided at the tip of 5. A lock claw 107 that locks on the peripheral wall of the through hole 102 is provided at the tip of the locking piece 106.

Further, the grommet main body 104 is provided with an abutting portion 108 located on the back side of the partition wall 100 with respect to the lock claw 107 and in close contact with the partition wall 100 to play a waterproof function. Partition wall 10 with part 108
It is designed to hold 0. This grommet 103
In the case of, for example, when tension acts on the electric wire 101 and the inner base portion 105 is biased in the direction W that comes out of the partition wall 100, the lock claw 107 is biased in a direction that spreads radially outward, and the lock claw 107 is partitioned. It can be prevented from coming off the wall 100.

[0005]

However, in the above-mentioned grommet 103, when the grommet 103 is detached from the partition wall 100, for example, when the electric wire 101 is repaired, the locking piece 106 or the lock claw 107 is radially inward. It is necessary to remove the lock claw 107 from the partition wall 100 by pressing to the above position, and the pressing force at this time needs to be considerably large, and in some cases, the locking piece 106 and the lock claw 107 may be damaged. . Further, since the pressing force must be applied from the side of the locking piece 106 and the lock claw 107,
If the space around the grommet 103 is narrow, the removal work is difficult and time-consuming.

Therefore, an object of the present invention is to solve the above problems and to provide a lock releasing mechanism capable of easily releasing a lock such as a grommet.

[0007]

The above object of the present invention is a mechanism for releasing a fixed state of an electric wire support member fixed to a partition wall, which is elastically deformable by extending in a U shape from the electric wire support member. This can be achieved by a configuration in which a lock claw arranged at the tip of the piece and locked to the partition wall and a rib extending from the lock claw to the opposite side through the base of the lock piece are provided. Further, the rib may be arranged on the opposite side of the locking claw, bypassing the base of the locking piece.

In this lock release mechanism, by pushing up the rib in a predetermined direction along the vertical direction of the partition wall, the lock claw can be elastically deformed in the direction away from the partition wall and can be removed. Is relatively small and can be easily unlocked. Further, since a force is applied in the vertical direction of the partition wall, the removal work can be easily performed even if the space around the grommet is small.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments in which the lock releasing mechanism according to the present invention is applied to a grommet as an electric wire supporting member will be described below with reference to the drawings. 1 is a sectional view of a grommet of a first embodiment to which a lock release mechanism according to the present invention is applied, FIG. 2 is a perspective perspective view of a portion surrounded by a circle P in FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. Figure, Figure 4 (A),
(B), (C) is sectional drawing explaining the effect | action of the grommet of 1st Embodiment which concerns on this invention, FIG. 5 is a perspective view of the locking piece of 2nd Embodiment which applied the lock release mechanism which concerns on this invention. FIG. 6 is a perspective view of a locking piece of a third embodiment to which the lock releasing mechanism according to the present invention is applied.

Referring to FIG. 1, a grommet 1 according to the present invention.
Is used, for example, when an electric wire is pierced through a partition wall 2 (showing a cut state) of an automobile, and is formed of elastic rubber, flexible resin, or the like. The grommet 1 is provided with a cylindrical main body 11 into which electric wires are fitted and fixed, and an inner base portion 12 for fixing to the peripheral wall of the mounting hole of the partition wall 2. On the upper side of the inner base 12, a plurality of, in this example, two U-shaped locking pieces 13 are provided.
Are provided at a position 180 degrees apart.

FIG. 2 is a perspective view of the locking piece 13 encircled by the circle P in FIG. 1, in which the tip of the locking piece 13 surrounds the inner base 12 and the peripheral wall of the mounting hole of the partition wall 2. A locking claw 14 for stopping is provided. A rib 15 having a predetermined length is provided on the inner side of the lock claw 14. This rib 15
Is movably inserted into a notch 16 provided in the axial direction of the inner base 12 from the upper end surface of the locking piece 13. A stopper 17 of an appropriate size is provided inside the inner base 12 at the tip of the rib 15.

Here, the outer peripheral surface of the main body 11 is provided with an abutting portion 18 located on the opposite side of the partition wall 2 with respect to the lock claw 14. By sandwiching the peripheral wall of the mounting hole of the partition wall 2 with the contact portion 18 and the lock claw 14, the grommet 1
Is fixed to the partition wall 2. This grommet 1 is a partition wall 2
When installing in the mounting hole of, the main body 11 of the grommet 1
Is inserted into the mounting hole 21 from the tip of the locking piece 13 of the inner substrate 12. Then, the locking piece 13 is pressed by the peripheral wall of the mounting hole to be pushed inward in the radial direction. Further, when the grommet 1 is inserted into the mounting hole 12, when the lock claw 14 projects to the opposite side of the partition wall 2, the locking piece 13 returns to its original state by the elastic restoring force, and the lock claw 14 and the abutting portion. The partition wall 2 fits in with 18. As a result, the lock claw 14 is locked to the peripheral wall of the mounting hole and the grommet 1 is fixed. After that, the electric wire is fixed to the main body 11 by winding a tape or the like.

As shown in FIG. 3, the grommet 1 is locked in a state where it is locked in the mounting hole 21 of the partition wall 2, for example, when a pulling force acts on the electric wire and the grommet 1 is urged in the direction of coming out. Since the inner base 12 moves in the direction of the arrow X along the axis with the claw 14 and the contact portion 18 left in the original positions, bending stress acts on the curved portion of the locking piece 13.

Here, in the grommet 1, when the inner base portion 12 moves by a predetermined distance, the stopper 17 contacts the peripheral portion of the notch 16 to prevent the inner base portion 12 from moving further. ing. As a result, it is possible to prevent an excessive bending stress from being applied to the locking piece 13 and prevent the locking piece 13 from being damaged.

Next, the operation of unlocking the lock claw 14 for removing the grommet 1 from the partition wall 2 will be described with reference to FIG. As shown in FIG. 4A, with the grommet 1 locked to the partition wall 2, a force in the Y direction along the axis of the inner substrate 12, that is, the grommet insertion direction is applied to the stopper 17 or the rib 15. . By doing so, as shown in FIG. 4B, it is possible to obtain a moment force for further bending the curved portion of the locking piece 13 and moving the lock claw 14 in the unlocking direction with a relatively small force. Then, due to this moment force, the rib 15 rotates counterclockwise in the figure by a predetermined angle with the boundary with the locking piece 13 as a fulcrum. Along with this, the lock claw 14 and the locking piece 1
The tip of 3 moves inward in the radial direction, and the lock claw 14 moves the partition wall 2
The lock is released by moving to the inside of the peripheral wall of the mounting hole.

With the lock thus released,
By pulling out the grommet 1 in the removal direction along the axis as shown in FIG. 3C, the lock claw 14 is pulled out from the mounting hole 21 of the partition wall 2, and the grommet 1 can be removed from the partition wall 2. it can. This grommet 1
As described above, the locking of the locking claw 14 can be released only by pulling up the stopper 17 or the rib 15 along the axial center, so that the grommet 1 can be easily removed from the partition wall 2. Further, even if the space around the grommet 1 is narrow, the lock of the lock claw 14 can be easily released.

FIG. 5 is a perspective view of the locking piece of the grommet according to the second embodiment of the present invention. In the above-described grommet 1, the rib 25 of the locking piece 23 is provided with the flat stopper 27. In this embodiment, as shown in FIG.
An operating flange 29 is provided on the projection 7. The configuration of other parts is the same as the configuration of the first embodiment. This locking piece 23
In the above, since the operation flange 29 is provided, it is easy to put on the finger and pull it up, and the lock claw 24 for rotating the rib 25 can be unlocked more easily.

FIG. 6 is a perspective view of a locking piece of the grommet according to the third embodiment of the present invention. As shown in FIG. 6, a U-shaped locking piece 41 is provided on the upper side of the inner base 12, a locking pawl 42 is provided at the tip of the locking piece 41, and the locking piece 41 is surrounded from both sides of the locking pawl 42. Thus, the frame-shaped rib 43 can be provided. The other parts are the same as the configuration of the first embodiment.

FIG. 7 is a sectional view taken along line CC of FIG. In order to unlock the lock claw 42 of the third embodiment, first, as shown in FIG. 7 (A), the tip of the jig 5 such as a minus driver is attached to the inner surface 44 of the locking piece 41 and the rib 43. Insert in between. Next, as shown in FIG. 7B, the intermediate portion of the jig 5 is applied to the upper end surface of the locking piece 41 to push up the tip of the jig 5.

In this way, the inner side of the rib 43 is pushed up by the tip of the jig 5, and the moment force for moving the lock claw 42 in the unlocking direction can be obtained with a relatively small force, and the boundary with the locking piece 41 can be obtained. It rotates counterclockwise in the figure with the part as a fulcrum. Along with this, the tips of the lock claw 42 and the locking piece 41 move radially inward, and the lock claw 42
Is removed from the peripheral wall of the mounting hole 21 of the partition wall 2 and the lock is released. In this embodiment, since the lock claw 42 can be unlocked with a thin tool such as the jig 5, even when there is almost no space around the grommet,
It becomes possible to unlock. Further, although the rib 43 is configured in a frame shape surrounding the locking piece 41, the rib 43 may have a shape in which a part of the frame is cut off, or may be configured so as to go around only from one side.

In each of the above-described embodiments, the case where the present invention is applied to the grommet has been described, but the present invention is not limited to this and can be applied to a clip for harness fixing.

[0022]

As described above, in the lock releasing mechanism of the present invention, the elastically deformable lock claws that engage with the peripheral wall of the mounting hole are provided around the cylindrical inner base portion that is inserted into the mounting hole. Since a rib extending from the lock pawl to the inner diameter of the inner base is provided, pressing the rib in a predetermined direction along the axial center of the inner base causes the lock pawl to elastically deform radially inward. The lock can be released easily from the mounting hole by a relatively small force. Moreover, since a force is applied in the axial direction of the inner base portion, the removal work can be easily performed even if the space around the grommet is small.

[Brief description of drawings]

FIG. 1 is a sectional view of a grommet of a first embodiment to which a lock release mechanism according to the present invention is applied.

FIG. 2 is a perspective view of a portion surrounded by a circle P in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

4 (A), (B) and (C) are cross-sectional views for explaining the action of the grommet of the first embodiment according to the present invention.

FIG. 5 is a perspective view of a locking piece of a second embodiment to which the lock release mechanism according to the present invention is applied.

FIG. 6 is a perspective view of a locking piece of a third embodiment to which a lock release mechanism according to the present invention is applied.

7A and 7B are sectional views taken along the line CC of FIG.

FIG. 8 is a sectional view showing a conventional grommet.

[Explanation of symbols]

 1 Grommet 2 Partition wall 5 Jig 11 Main body 12 Inner base 13, 23, 41 Locking piece 14, 24, 42 Lock claw 15, 25, 43 Rib 17, 27, Stopper 21 Mounting hole

Claims (2)

[Claims] 1. A release mechanism for releasing a fixed state of an electric wire support member fixed to a partition wall, the mechanism extending from the electric wire support member in a U shape and arranged at the tip of an elastically deformable locking piece, and the partition wall. A lock release mechanism, comprising: a lock claw that is locked to the lock claw; and a rib that extends from the lock claw to the opposite side through the base of the locking piece. 2. A mechanism for releasing a fixed state of an electric wire support member fixed to a partition wall, the mechanism extending from the electric wire support member in a U shape and arranged at the tip of an elastically deformable locking piece, the partition wall A lock release mechanism comprising: a lock claw that is locked to the lock claw; and a rib that is located on the opposite side of the lock claw, bypassing the base of the lock piece.