JPH1155831A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet which has high reliability in a fitted condition to a panel hole or the like, and can be removed easily at the time of repairing or cleaning of an apparatus. SOLUTION: A grommet 1 is constituted of a grommet body 2 consisting of elastic soft material, such as rubber or the like, and a lock member 3 consisting of elastic hard material, such as synthetic resin or the like. The lock member 3 involves a lever part 15 which is formed so as to be extended from ends of a plurality of locking parts 13 involving a locking claw 14, and deflect inwards by protruding its front end from a flange 11 and pressing its front end inwards. A protective wall 16 for preventing malfunction of the lever is raised on both sides of the front end of the lever 15 and the flange 11. In the grommet body 2, an elastic cover 7 which covers the front end of the lever 15 and the front end of the protective wall 16 is raised on the outer surface of a base 4. A retaining protrusion 9 which engagedly retains the front end of the deflecting lever 15 is formed at the inner surface of the elastic cover 7, and an extruding protrusion 8 which releases the engaging condition of the front end of the lever 15 is formed at the outer surface and the inner directional end of the elastic cover 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet comprising a grommet body made of an elastic soft material and a lock member made of an elastic hard material, and more particularly to a grommet which can be easily mounted and removed.

[0002]

2. Description of the Related Art Conventionally, various grommets have been used to protect a wire harness inserted through a panel hole or the like of an automobile and wired from an edge of the panel hole and to ensure waterproofness. . The conventional grommet 50 shown in FIGS. 5 and 6 is composed of a grommet body 51 made of an elastic soft material such as rubber, and a lock member 52 made of an elastic hard material such as a synthetic resin.

[0003] As shown in FIG.
In 1, a harness insertion tube 54 for holding a wire harness 63 is provided coaxially on the outer surface of a disk-shaped substrate 53 via a bellows portion 55. A waterproof lip 56 is provided upright at the front end of the grommet body 51. Further FIG.
As shown in (1), the inner peripheral surface of the grommet main body is provided with an annular concave portion 57.

[0005] Then, as shown in FIG.
2 has a ring-shaped flange 58 that fits into the annular concave portion 57, and a peripheral wall 59 is provided upright on the inner diameter portion of the flange 58. Four hollow convex portions 64 are provided on the inner surface of the peripheral wall 59.
As shown in FIG. 6, a substantially L-shaped locking portion 60 having a locking claw 61 and a stopper 62 at its front end is provided at the front end of each hollow convex portion 64 so as to stand outward. I have.

To attach the grommet 50 to, for example, a panel hole, first, the lock member 52 is pushed into the panel hole (not shown) from the locking portion 60 side. Then, the inclined portion 65 of the locking portion 60 shown in FIG. 6 slides in contact with the edge of the panel hole, so that the distal end of the locking portion bends inward. The sliding contact is released and comes into contact with the stopper 62. At this time, the locking claws 61 are engaged with the edge of the panel hole, and the lock member 52 is locked in the panel hole. The grommet 50 is completed when the grommet main body 51 is mounted by fitting the locking member flange 58 and the grommet main body fitting recess 57 to the lock member 52 in this state.

[0006] In addition, FIG.
And a grommet shown in FIG. 8 is disclosed. In the conventional grommet described below, members and the like already described with reference to FIGS. 5 and 6 are denoted by the same reference numerals in the drawings to simplify or omit the description.

The locking member 72 shown in FIG. 7 has a locking claw 61 at the tip of a locking portion 60 and a lever portion 73 extending therefrom. When the lock member 72 is attached to the panel hole, the entire locking portion 60 is bent inward by pressing the lever portion 73 inward with a finger or the like.
2 can be easily inserted into the panel hole. When the pressing force acting on the lever portion 73 is released with the lock member 72 inserted into the panel hole, the locking claw 61 is engaged with the panel hole edge, and the lock member 72 is locked in the panel hole. You.

FIG. 8 shows that the lock member 72 is connected to a panel 74.
7 shows a state in which the grommet main body 71 holding the wire harness 63 is fitted into the lock member 72 while being attached to the hole provided in the lock member 72.

[0009]

However, in the grommets 50 and 70 described above, the locking portion 60 is covered by the grommet main body 51 or 71 and is hidden when the grommet is attached to a panel hole or the like. When the grommet is removed from the panel hole or the like in order to repair or clean the device to which the device is connected, there is a trouble that the locking portion 60 or the lever portion 73 must be searched by hand. Further, in order to remove the grommet 50 shown in FIGS. 5 and 6, it is necessary to simultaneously disengage the plurality of locking claws 61 and the edge of the panel hole using a jig, and the operation is more complicated. Was.

The grommet 70 disclosed in Japanese Utility Model Laid-Open Publication No. 61-67484 can easily lock the grommet 70 attached to a panel hole or the like when an unintended external force acts around the lever portion 73. There is a concern that the engagement between the claw 61 and the edge of the panel hole may be released.

[0011]

The object of the present invention is to provide a harness insertion cylinder for holding a wire harness, which is provided coaxially on the outer surface of a disk-shaped substrate, and a waterproof lip for ensuring watertightness is provided at the front end. A grommet body made of a soft elastic material having an annular concave portion on an inner peripheral surface thereof; and a ring-shaped flange fitted to the annular concave portion. In a grommet comprising a lock member made of a hard elastic material provided with a plurality of locking portions having locking claws at a front end, the lock member is extended from the locking portion end, and a tip is provided. A lever portion that protrudes from the flange and flexes inward by pressing the distal end portion inwardly, and a protective wall for preventing malfunctions on both sides of the lever portion distal end, and the grommet body includes The substrate An elastic cover that surround the lever tip and the protective wall tip on the surface, has a holding projection that engages holding the lever tip to the inner surface of the elastic cover,
The problem can be solved by a grommet characterized in that the elastic cover has a pushing projection for releasing the engagement state of the tip of the lever portion on the outer surface.

According to the grommet constructed as described above, since both ends of the lever portion are guarded by the protective walls for preventing malfunction, the locking claw and the panel hole are provided unless an external force is applied intensively to the lever portion. There is no risk of disengagement with the edge. Therefore, the possibility that the lever is pressed by an unintended external force and the engagement between the locking claw and the edge of the panel hole is released is reduced.

According to the grommet having the above structure, an elastic cover that covers the tip of the lever portion and the tip of the protective wall is provided upright on the outer surface of the substrate of the grommet body. Therefore,
When the grommet is removed, the position of the lever portion can be visually recognized, so that the trouble of searching for the lever portion by groping is eliminated.

Further, according to the grommet having the above structure, by pressing the lever portion inward from the outside of the elastic cover, the lever portion is bent inward and the tip of the lever portion is engaged with the holding projection on the inner surface of the elastic cover. Then, the engagement between the locking claw and the edge of the panel hole is maintained in a disengaged state. Therefore,
When the grommet is removed, even if the grommet has a plurality of locking portions, the engagement between the locking claw and the panel hole edge can be released one by one. It is not necessary to simultaneously disengage the parts from each other, thereby simplifying the operation.

Further, according to the grommet having the above structure, the engagement between the tip of the lever portion and the holding projection can be released by pressing the pushing projection provided on the outer surface of the elastic cover. Therefore, the grommet can be removed and attached many times.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the grommet according to the present invention will be described below in detail with reference to FIGS.
FIG. 1 is an exploded perspective view showing an embodiment of the grommet of the present invention, FIG. 2 is an assembled sectional view in FIG. 1, and FIGS. 3 and 4 are enlarged views of the vicinity of a locking portion in FIG.

As shown in FIG. 1, the grommet 1 of this embodiment comprises a grommet main body 2 and a lock member 3. The grommet body 2 is made of an elastic soft material such as rubber, and the lock member 3 is made of an elastic hard material such as a synthetic resin. The grommet body 2 includes a wire harness 17.
Is provided coaxially with the outer surface of the disk-shaped substrate 4 via a bellows 18 via a bellows 18. At the front end of the grommet body 2, a waterproof lip 6 is provided upright. As shown in FIG. 2, an annular recess 10 is formed on the inner peripheral surface of the grommet main body.

On the other hand, as shown in FIG. 1, the lock member 3 has a ring-shaped flange 11 which can be fitted into an annular concave portion 10 on the inner peripheral surface of the grommet main body 2, and an inner diameter portion of the flange. Is provided with a peripheral wall 12. Four hollow projections 19 are provided on the inner surface of the peripheral wall. The side wall of the hollow convex portion extends so as to protrude from the flange 11, and the protruding portion functions as a protective wall 16 that guards a tip of a lever portion 15 described later.

As shown in FIG. 2, the front end (lower end in the figure) of the peripheral wall 12 of the lock member 3 has a locking claw 1 at its tip.
A substantially L-shaped locking portion 13 having an upper portion 4 is provided so as to extend outward. Further, a lever portion 15 is extended from the distal end of the locking portion 13 so as to be substantially parallel to the peripheral wall 12. The tip of the lever portion projects from the flange 11 to a height substantially equal to the height of the protective wall 16. When the portion protruding from the flange at the tip of the lever 15 is pressed inward by a finger or the like, the lever 15 can bend inward.

As shown in FIG. 1, an elastic cover 7 is provided on the outer surface of the substrate 4 of the grommet main body 2 to cover the protection wall 16 protruding from the flange 11 and the tip of the lever portion 15. Further, as shown in FIG. 2, the inner surface of the elastic cover 7 has a holding projection 9 for engaging and holding the distal end of the bent lever portion 15, and the outer surface and the inner end of the elastic cover 7 are further provided on the inner surface. Is provided with a pushing projection 8 for releasing the engagement between the holding projection 9 and the tip of the lever portion 15.

Hereinafter, the operation of the grommet will be described in detail with reference to FIGS. FIG. 3 shows a state around the locking portion 13 when the grommet is attached to the hole provided in the panel 20, and the locking claw 14 is engaged with the edge of the panel hole. Between the lever portion 15 and the peripheral wall 12,
The bending space 19 is defined, and when an external force is applied in the direction A in the figure from the outside of the elastic cover 7, the lever portion 15 bends inward from the locking portion 13. At this time, the lever 15
Are guarded by the protective wall 16, it is necessary to intensively press the tip of the lever 15 with fingers or the like.

Then, as shown in FIG.
5 is a holding projection 9 provided on the inner surface of the elastic cover 7.
And the lever portion 15 is held in a bent state. In this state, the engagement between the locking claw 14 and the edge of the panel hole is released, so that the grommet can be easily removed from the panel hole. Then, when an external force is applied to the pushing protrusion 8 provided on the outer surface of the elastic cover 7 in the direction B in the drawing, the engagement of the tip of the lever portion 15 by the holding protrusion 9 is released, and the state returns to the state of FIG. 2 again. Can be.

According to the grommet of the present embodiment described above, since both ends of the tip of the lever portion 15 are guarded by the protection wall 16 extending on the side wall of the hollow projection 19, the tip of the lever portion 15 is protected. As long as the external force is not applied intensively, there is no concern that the engagement between the locking claw 14 and the edge of the panel hole is released. Therefore, the lever portion 15 is not affected
Is less likely to be disengaged from the locking claw 14 and the edge of the panel hole due to being pressed, thereby improving the reliability of the grommet in the mounted state.

On the outer surface of the substrate 4 of the grommet main body 2, an elastic cover 7 that covers the end of the lever 15 and the end of the protective wall 16 is provided upright. Therefore, when removing the grommet from the panel hole or the like, the position of the lever portion 15 can be easily grasped visually, so that the trouble of searching for the lever portion 15 by groping is eliminated, and work efficiency is improved.

Also, from the outside of the elastic cover 7, the lever 1
5 By pressing the tip inward, the lever 15
Is bent inward from the locking portion 13 and the tip of the lever engages with the holding projection 9 on the inner surface of the elastic cover 7, and the locking claw 14
And the edge of the panel hole is kept disengaged. Accordingly, when the grommet is removed from the panel hole or the like, even if the grommet has a plurality of locking portions 13, the engagement between the locking claw 14 and the panel hole edge can be released one by one. It is not necessary to simultaneously disengage the locking claw and the panel hole edge, thereby simplifying the operation.

Further, according to the grommet having the above structure, the engagement between the tip of the lever portion 15 and the holding projection 9 can be released by pressing the pushing projection 8 provided on the outer surface and the inner end of the elastic cover 7. it can. Therefore, the grommet can be removed and attached many times.
When attaching the grommet to the panel hole or the like, when inserting the grommet into the panel hole or the like, the tip of the lever portion 15 and the holding projection 9 are engaged with each other. If the locking claw 14 is engaged with the edge of the panel hole by releasing the engagement between the tip and the holding projection 9, the grommet can be pushed with a strong force into the panel hole or the like, and a plurality of levers can be simultaneously pushed by fingers. Since there is no need to press with, for example, the burden on the operator is reduced.

[0027]

As described above, according to the grommet of the present invention, since both ends of the end of the lever portion are guarded by the protective walls for preventing malfunction, external force is not concentrated on the end of the lever portion. As long as there is no fear that the engagement between the locking claw and the edge of the panel hole is released. Therefore, the possibility that the lever is pressed by an unintended external force and the engagement between the locking claw and the edge of the panel hole is reduced is reduced, and the reliability of the grommet in the mounted state is improved. Further, an elastic cover that covers the tip of the lever portion and the tip of the protective wall is provided upright on the outer surface of the substrate of the grommet body. Therefore, when removing the grommet, the position of the lever portion can be visually recognized, so that the trouble of searching for the lever portion by groping is eliminated, and work efficiency is improved.

Further, by pressing the lever portion inward from the outside of the elastic cover, the lever portion is bent inward and the tip of the lever portion is engaged with the holding projection on the inner surface of the elastic cover, so that the locking claw and the panel are formed. It is maintained in a state of being disengaged from the hole edge. Therefore, when the grommet is removed, even if the grommet has a plurality of locking portions, the locking claw and the panel hole edge can be disengaged one by one.
There is no need to simultaneously disengage the plurality of locking claws from the panel hole edge, thereby simplifying the operation. Further, according to the grommet having the above configuration, the engagement between the tip of the lever portion and the holding projection can be released by pressing the pushing projection provided on the outer surface of the elastic cover. Therefore, the grommet can be removed and attached many times, so that the product life is extended.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a grommet according to the present invention.

FIG. 2 is an assembled sectional view of the grommet in FIG.

FIG. 3 is an enlarged view around a locking portion before an external force is applied to a lever portion in FIG. 2;

FIG. 4 is an enlarged view around a locking portion after an external force is applied to a lever portion in FIG. 2;

FIG. 5 is an exploded perspective view of a conventional grommet.

FIG. 6 is an assembled sectional view in FIG. 5;

FIG. 7 is a perspective view of a lock member of another conventional grommet.

8 is an assembled sectional view of a lock member and a grommet main body in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grommet 2 Grommet main body 3 Lock member 4 Substrate 5 Harness insertion tube 6 Waterproof lip 7 Elastic cover 8 Extrusion protrusion 9 Retaining protrusion 10 Annular concave portion 11 Flange 12 Surrounding wall 13 Locking portion 14 Locking claw 15 Lever portion 16 Protective wall 17 Wire harness

Claims (1)

[Claims] 1. A harness insertion tube for holding a wire harness is provided coaxially on the outer surface of a disk-shaped substrate, has a waterproof lip at a front end portion for ensuring watertightness, and has an annular concave portion on an inner peripheral surface. A plurality of locking members having a grommet body made of a soft elastic material and a ring-shaped flange fitted into the annular concave portion, a peripheral wall being erected on an inner diameter portion of the flange, and having a locking claw at a front end of the peripheral wall. A grommet comprising a lock member made of a hard elastic material provided with a portion, wherein the lock member is extended from the end portion of the locking portion, a tip projects from the flange, and the tip portion faces inward. And a protection wall for preventing malfunctions on both sides of the tip of the lever, and the grommet main body is provided with the tip of the lever and the protection wall on the outer surface of the substrate. tip An elastic cover for covering the elastic cover, an inner surface of the elastic cover having a holding projection for engaging and holding the tip of the lever portion, and an outer surface of the elastic cover having a pushing projection for releasing the engaged state of the tip of the lever portion. A grommet characterized by being.