JPS60248477A - Cover fitting structure of steering wheel - Google Patents

Abstract

PURPOSE:To improve the assembly precision by providing coupling sections corresponding to a steering wheel main body and the outer periphery of a cover and coupling them prior to the caulking work. CONSTITUTION:The caulking hole 18 of a cover 17 is fitted over the caulking lug 15 protruded from a recess 14, and the coupling section 19 of the cover 17 is coupled with the coupling section 16 on the peripheral wall of the recess 14. The cover 17 can be fitted to a steering wheel main body 11 by caulking the tip of the caulking lug 18 by heat in sequence. In this case, the outer periphery of the cover 17 if fixed in the recess 14, thus preventing other caulking portions from being displaced or the outer periphery of the cover 17 from being floated during the caulking work.

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a structure for attaching a lid to a steering wheel body in an automobile, etc., and in which, for example, a concave portion is formed in the spoke portion of the steering wheel by removing meat in order to reduce weight. In such a case, the present invention relates to a mounting structure for a lid that closes the four parts.

(Prior art) Conventionally, as shown in FIG. 5, for example, a synthetic resin steering wheel body 1 has a steering wheel body 1 in front of spoke portions 3, in order to reduce weight and to prevent sink marks from occurring on the covering layer 3b on the front side of the spoke portion 3. In order to improve the appearance of the recess 4 and the feel when gripping the spoke part 3, the recess 4 was formed with a lid 7 made of synthetic resin. To attach the lid 7, which has been previously closed, a plurality of caulking protrusions 5 are protruded from the spoke portion 3, and caulking holes 8 are formed in the lid 7 at corresponding positions. Caulking protrusion 5 to part 8
was inserted, and the tips of the caulking protrusions 5 were caulked with heat or the like and attached to the surface of the spoke portion 3H.

Therefore, in the conventional installation of the lid body 7, the lid body 7 is attached by caulking in sequence, so that after caulking one caulking area, the caulking area of the other lid body 7 may be displaced, and the assembly with the steering wheel body 1 may be difficult. The attachment accuracy is poor, making the caulking work difficult. In addition, the other lid body 7
In some cases, the periphery of the caulked portion may be lifted up, and in this case, the caulking is performed with a gap formed between the steering wheel body l and the steering wheel body, which may cause rattling or chattering noise during driving.

(Object of the Invention) The present invention provides a structure in which a lid body is attached to a steering wheel body, in which a retaining part is provided corresponding to the outer periphery of the steering wheel body and the lid body, and the two are engaged through an engaging part before caulking work. This prevents the displacement of other caulking parts and the lifting of the outer periphery of the lid, which conventionally occur during caulking work, improving assembly accuracy and making the caulking work that is the assembly work easier. Another object of the present invention is to provide a lid mounting structure for a steering wheel body that can be firmly mounted while preventing rattling and chattering noise during driving.

(Structure of the Invention) The gist of the present invention is a structure for attaching a lid to a steering wheel body, wherein a caulking projection is provided on one side of the steering wheel body and the lid, and a caulking hole is provided on the other side in a predetermined manner that corresponds to each other. As well as being formed in each position,
Further, the steering wheel body and the lid body are each formed with an engaging portion that can engage with each other at the outer peripheral edge position of the lid body,
The lid body attachment structure for a steering wheel is characterized in that the lid body is attached to the steering wheel body by engagement of both engaging portions and caulking with a caulking projection and a caulking hole.

(Example) Fig. 1 is a sectional view showing a state in which a lid body is attached to a steering wheel body in an embodiment of the present invention, and Fig. 2 is a back view of a spoke part with a lid body attached in the same embodiment.
3 is an enlarged end view taken along the line 1--2 of FIG. 1, and FIG. 4 is a sectional view showing another embodiment.

The steering wheel main body 11 of the embodiment shown in Figs.
a is welded, a ring part core metal 12a is welded to the end of the spoke part core metal 13a, and covering layers 13b and 12b made of a synthetic resin material such as PP are formed on the outer periphery of the spoke part core metal 13, a and the ring part core metal 12a. The spoke portions 13 and ring portions 12 are formed by coating layers 13b and 12, respectively.
b Lower cover that covers the boss, boss plate 20, etc. when forming =
21 are integrally formed.

Four parts 14 are formed on the back side of the spoke part 13 in order to reduce the weight and to prevent sink marks from occurring on the covering layer 13b on the front side of the spoke part 13.

Two caulking protrusions 15 projecting downward are provided within this recess 14, and three recessed engaging portions 16 that can be engaged with a lid engaging portion 19, which will be described later, are formed on the peripheral wall. ing.

The appearance of the back side of the spoke part 13 and the spoke part 13
A cover 17 is attached to the recess 14 to cover it so as to provide a good feel when gripping the recess 14.

The lid body 17 is made of a synthetic resin material such as PP, and has four parts 14.
Caulking holes 18, 18 are formed corresponding to the caulking protrusions 15, 15 protruding from the outer circumferential edge.
Hook-shaped engaging portions 19, 19, 19 that can be engaged are formed in correspondence with the engaging portions 16 provided on the peripheral wall. The circumferential edge of the caulking hole 18 is recessed so that the tip of the caulking projection 15 does not protrude toward the back side of the spoke portion 13 after the caulking projection 15 is caulked.

Therefore, the recess 14 of the steering wheel body 11
When attaching the lid body 17, the caulking holes 18-18 of the lid body 17 are covered with the caulking protrusions 15, 15 protruding from the inside of the four parts 14, and the engaging part 16 of the circumferential wall of the concave part 14 is attached. - Engagement portions 19 and 19 of lid body 17 to 16 fist 16
19 and successively swage the tips of the swage protrusions 18 using heat or the like, the lid 17 can be attached to the steering wheel body 11.

At that time, even if the tips of the crimping protrusions 18 are crimped one after another, the outer peripheral edge of the lid 17 will not fit the hook-shaped engaging portion 19 into the recess 1.
Since it is secured to the concave engaging portion 16 of the four peripheral walls and its position is fixed within the concave portion 14, it is possible to prevent other caulked parts from shifting during caulking work or to prevent the outer peripheral edge of the lid body 17 from lifting up. This makes it possible to improve the assembly accuracy and facilitate the caulking work, which is the assembly work, so that the lid body 17 can be firmly attached to the steering wheel body 11. Furthermore, since the outer peripheral edge of the lid body 17 can be prevented from lifting, it is possible to prevent rattling after installation and generation of chattering noise during driving.

In the embodiment, the caulking protrusion 19 and the concave retaining part 16 are provided on the steering wheel body ll side, and the lid body 17 is
Although the caulking hole 18 and the hook-shaped engaging portion 19 are provided on the side, as shown in FIG. 4, for example, the spoke portion 2
3, a caulking hole 25 and a hook-shaped engagement portion 26 are provided on the steering wheel body side, that is, the spoke portion 23 side, and a caulking protrusion 28 and a concave shape are provided on the lid body 27 side. An engaging portion 29 may be provided. Incidentally, when the lid body 27 is attached in this manner, the lid body 27 appears on the front side of the spoke part 23, so if a desired color or pattern is applied to the lid body 27, the design effect of the steering wheel can be enhanced. .

Furthermore, although the cover 17 of the embodiment is made of synthetic resin, it may of course be made of metal such as sheet metal as long as the outer periphery of the cover can be well engaged with the steering wheel body.

Furthermore, in the embodiment, a lid body that is attached to the steering wheel body is shown to cover the cut-off portion on the back side of the spoke part, but it is possible to extend this lid body and form it integrally with the lower car body for attachment. You may also do so.

(Effects of the Invention) The steering wheel lid mounting structure according to the present invention is provided with an engaging portion that corresponds to the steering wheel body and the outer periphery of the lid, so that the two can be engaged before the caulking operation, and the caulking operation can be carried out. This prevents the other caulking parts that were conventionally bundled inside from shifting and the outer periphery of the lid from lifting up, improving assembly accuracy, and making the caulking work that is the assembly process easier. The cover body can be firmly attached to the steering wheel body without rattling or rattling noise while driving.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a state in which a lid body is attached to a steering wheel body in an embodiment of the present invention, and FIG. 2 is a back view of a spoke part with a lid body attached in the same embodiment.
3 is an enlarged end view taken along line mm in FIG. 1, FIG. 4 is a sectional view showing another embodiment, and FIG. 5 is a sectional view showing a conventional mounting state. 1-11...Steering wheel body, 5.15.
28...Protrusion for caulking, 7.17.27...Lid body,
8・18φ25...Clinching hole, 16・19-26
・29...Engagement part. Figure 1 Figure 2

Claims (1)

[Claims] The lid body is attached to the steering wheel body in a structure in which a caulking protrusion is formed on one of the steering wheel body and the lid body, a caulking hole is formed on the other at a predetermined position corresponding to each other, and the The steering wheel main body and the lid body are each formed with an engaging portion that can be secured to each other at the outer peripheral edge position of the lid body, and the lid body is connected to the steering wheel body by engaging portions that can be secured to each other. A steering wheel lid mounting structure characterized in that the steering wheel lid body is attached by mating and caulking the caulking protrusion and the caulking hole.