JPH0579127U - Grommet structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a grommet structure that can be easily attached to an opening and does not fall off after attachment. [Structure] When press-fitted into the opening from the side of an engaging convex portion 4 formed by scattering an arbitrary number on the other side of the body portion 2 fitted into the opening provided in the plate-shaped member, When the press-fitting and circumferential taper surfaces formed on the inclined surface 4a of the locking convex portion 4 come into contact with the peripheral edge of the opening, the locking convex portion 4 is formed by the pressure applied to the inclination angle of the tapered surface. Refracts in the circumferential direction. Therefore, due to the refraction, the diagonal crossing diameter between the locking projections becomes smaller, so that the opening can be easily penetrated.
When it penetrates, the bent locking convex portion 4 is restored to the original state in which it was erected by the elasticity of the rubber-like material and is locked to the other side of the opening, so that it does not fall off after insertion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet structure, for example, a grommet structure that is used for a purpose such as being embedded between a key cylinder and a column cover, which are arranged in a column portion installed in front of a driver's seat of an automobile. is there.

[0002]

[Prior Art]

 Fig. 7 shows an example of a conventional grommet applied to a key cylinder arranged in the column portion of an automobile. FIG. 7 is a perspective view showing an example of a column cover. In FIG. 7, a hole 21 through which the handle shaft penetrates is opened in the front position of the column cover 20, and a key cylinder 22 is attached to the right side surface. The key cylinder 22 is fixed to a structure inside the column cover 20, and there is a gap between the opening 25 provided in the column cover 20 and the key cylinder 22. Grommet is inserted. 8 and 9 are cross-sectional views of a portion where the key cylinder 22 is arranged, and show a cross-sectional view of a conventional example structure of a grommet fitted in a gap. The grommet 23 shown in FIG. 8 has a body portion 23a having an inner diameter that fits into the outer diameter of the key cylinder 22, and by pressing the body portion 23a into the outer diameter portion of the key cylinder 22, the flange portion 23b is fitted. It is formed so that the gap portion is covered. Further, the grommet 24 shown in FIG. 9 is fitted to the outer diameter of the key cylinder 22 and is formed with flange portions 24a and 24b circumferentially attached to the front and back sides of the opening 25 of the column cover 20. As a result, the one flange portion 24b is inserted into the back surface side, and the other flange portion 24a is formed so as to cover the gap portion. Both of the grommets 23 and 24 are formed into a donut shape by a rubber-like material so that they can be deformed at the time of press-fitting and easily fit into the opening 25 of the key cylinder 22 or the column cover 20.

[0003]

Since the first conventional example grommet 23 shown in the above conventional example is only fitted to the outer periphery of the key cylinder 22, it adheres to the outer diameter portion of the key cylinder 22. There is a problem that slipping off easily occurs due to slip due to oil or the like and a slight inclination provided on the outer diameter portion of the key cylinder 22 as a draft taper. On the contrary, the second conventional grommet 24 is hard to come off after being fitted, so that the flange portion 24b is inserted through the gap into the rear surface side of the column cover 20. Since it has to be press-fitted into the opening 25 smaller than the outer diameter of, the workability is poor. The present invention was devised to solve the above-mentioned problems of the conventional grommet, and provides a grommet structure that can be easily attached to the opening and does not fall off after attachment. With the goal.

[0004]

[Means for Solving the Problems]

 Means to be adopted by the present invention for achieving the above-mentioned object are: a body having an outer diameter substantially equal to the diameter of an opening provided in a plate-like member and fitted into the opening; and a body of the body. A flange portion that is provided on one side and has an outer diameter that is larger than the opening diameter and circumscribes on one side of the opening portion, and an outer portion that is provided on the other side of the body portion and that is larger than the opening diameter. In the structure of a grommet, which has a diameter and is integrally formed of a rubber-like material, with a locking projection that elastically deforms by press-fitting from one side of the opening and penetrates into the other side of the opening, An arbitrary number of convex portions are scattered on the same circumference to form a collapsible piece that bends when press-fitted into the opening, and the contact surface of the locking convex portion with the opening when press-fitting is pressed in the press-fitting direction and A grommet characterized by being formed on a tapered surface that inclines at a predetermined angle in the circumferential direction. It is an elephant.

[0005]

[Action]

 The grommet according to the present invention is scattered when press-fitted into the opening from the side of the locking projection formed by scattering an arbitrary number on the other side of the body fitted in the opening provided in the plate-like member. When the tapered surface that is inclined in the press-fitting direction and the circumferential direction of each locking projection comes into contact with the peripheral edge of the opening, the locking projection is circular due to the pressure applied to the inclination angle of the tapered surface. Refracts in the circumferential direction. Therefore, since the diagonal crossover diameter between the locking projections becomes smaller due to the bending, the opening can be easily penetrated, and when it penetrates, the bent locking projections are restored to the original state by the elasticity of the rubber-like material. Since it is restored and locked to the other side of the opening, it does not fall off after insertion. Since the one side of the opening is covered by the flange formed on the one side of the body, the appearance of the one side of the opening, which is the surface side of the plate member, can be pretended.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following embodiments are examples of embodying the present invention and do not limit the technical scope of the present invention. The present embodiment shows the structure of a grommet as an application example that is embedded in a gap between a column cover of a key cylinder arranged in a column portion provided in front of a driver's seat of an automobile. 1 is a perspective view of a grommet according to an embodiment of the present invention, FIG. 2 is a plan view of the grommet, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. The top view (a) which expands and shows the locking convex part formed in a grommet, and the sectional view (b) of the BB arrow position, and FIG. 5 are the locking convex at the time of press-fitting in the opening part of a grommet. FIG. 6 is a cross-sectional view showing an example in which the grommet is attached to a key cylinder portion arranged on a column cover of an automobile.

As shown in FIG. 1, the grommet 1 according to this embodiment is formed of a rubber-like material in a donut shape as a whole, and as shown in FIG. 6, an opening of a column cover 8 which is a plate-like member. It is embedded in the gap between the key cylinder 7 arranged in the portion 9 and the column cover 8. As shown in FIGS. 2 and 3, the body 2 of the grommet 1 has an outer diameter that is substantially the same as the diameter of the opening 9 into which the grommet 1 is fitted, and the inner diameter is slightly smaller than the outer diameter of the key cylinder 7. It is formed so as to be pressed into the key cylinder 7 and come into close contact with the key cylinder 7. A flange portion 3 is formed on one side of the body portion 2, and a plurality of locking projections 4, 4 are formed on the other side thereof. The flange portion 3 is formed to have a diameter larger than the diameter of the opening portion 9 and can cover the surface side of the opening portion 9 when the grommet 1 is fitted into the opening portion 9. As shown in the enlarged view of FIGS. 4 (a) and 4 (b), each of the locking projections 4 and 4 has a predetermined taper angle θ1 in the direction in which it is pressed into the opening 9 and a predetermined taper angle in the circumferential direction. An inclined portion 4a having an inclination angle with θ 2 is formed.

The taper angles θ1 and θ2 of the inclined portion 4a formed on the locking projection 4 are such that when the grommet 1 is press-fitted into the opening 9 from the locking projection 4 side. The engaging convex portion 4 is bent by press-fitting pressure applied to the inclined portion 4a from the inner edge of the opening portion 9 abutting on the opening portion 4 to facilitate press-fitting into the opening portion 4. That is, as shown in sequence in FIG. 5, when the press fitting of the grommet 1 into the opening 9 from the locking projection 4 side is started (a), the taper angle in the press fitting direction of the inclined portion 4a of the locking projection 4 is increased. Insertion into the opening 9 is facilitated by θ1. Further, since the inner edge of the opening 9 abuts on the circumferential taper angle θ2 formed along with the taper angle θ1 and the applied pressure is received by the inclined surface of the taper angle θ2, the opposite direction of the inclination is obtained. As a pressing force is applied to, the standing protrusion 4 is bent in the circumferential direction (b). When the locking projection 4 is bent, the height of the locking projection 4 is lowered, so that the grommet 1 is easily inserted into the opening 9 (c 1). When the locking projection 4 penetrates to the opposite side of the opening 9, the locking projection 4 bent by the elastic recovery of the rubber-like material stands up and the grommet 1 is locked in the opening 9 (d 1). Since the locking convex portion 4 is not provided with an inclination angle in the extracting direction, the locking convex portion 4 is prevented from falling off after insertion. In this embodiment, the locking projections 4 are formed at four positions on the circumference of the diagonal line, but the number and position of the locking projections 4 are appropriately set according to the condition of the application site. Can be changed. Further, the inclination direction and the inclination angle of the inclined portion 4a provided on the locking convex portion 4 can be similarly changed according to the material of the grommet and the state of the application site.

[0009]

[Effect of the device]

 As described above, according to the present invention, an opening is made from the side of the locking projection formed on the other side of the body fitted in the opening inside diameter provided in the plate-like member. When the tapered surfaces formed in the press-fitting direction and the circumferential direction of each of the interlocking projections that are scattered are in contact with the peripheral edge of the opening, the pressure applied to the inclination angle of the tapered surface causes The locking protrusion is bent in the circumferential direction. Therefore, the height of the locking projection is lowered by refraction, so that the opening can be easily penetrated, and when the pressure of press fit is removed through the opening, the bent locking projection is made of rubber-like material. Due to its elasticity, it returns to its original state, and is locked on the other side of the opening. Therefore, according to the grommet structure of the present invention, it is possible to provide a grommet that is easy to insert into the opening when press-fitting and does not fall off after insertion.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same grommet.

FIG. 3 is a cross-sectional view taken along the line AA shown in FIG.

FIG. 4 is an enlarged partial plan view (a) of the locking projection of the grommet and a sectional view (b) taken along the line BB in FIG.

FIG. 5 is a plan view showing changes in the locking projection when the grommet is pressed into the opening.

FIG. 6 is a sectional view showing a state in which the same grommet is attached to the periphery of the key cylinder.

FIG. 7 is a perspective view showing an example of a key cylinder arranged on a column cover.

FIG. 8 is a cross-sectional view showing a structural example of a first conventional example grommet in an applied state.

FIG. 9 is a sectional view showing a structural example of a second conventional example grommet in an applied state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Grommet 2 ... Body part 3 ... Flange part 4 ... Locking convex part 4a ... Inclined part 8 ... Column cover (plate member) 9 ... Opening θ1 ... Press-fitting direction taper angle θ2 ... Circumferential taper angle

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A body portion having an outer diameter substantially equal to the diameter of the opening portion provided in the plate member and fitted into the opening portion; and a body portion provided on one side of the body portion and larger than the opening portion diameter. And a flange portion having an outer diameter that surrounds one side of the opening portion, and an outer diameter that is provided on the other side of the body portion and is larger than the opening portion diameter from one side of the opening portion. In a structure of a grommet in which a locking convex portion elastically deformed by press-fitting and penetrating into the other side of the opening is integrally formed of a rubber-like material, the locking convex portions are scattered on the same circumference in an arbitrary number of times. Formed as a collapsible piece that bends when pressed into the opening,
A structure of a grommet characterized in that a contact surface with the opening portion when the locking convex portion is press-fitted is formed into a tapered surface which is inclined at a predetermined angle in the press-fitting direction and the circumferential direction.