JPS5843495Y2 - steering wheel - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a steering wheel (a rim in which wood and soft synthetic resin are joined at the top and bottom).

As shown in Figs. 1 and 2, the conventional steering wheel has an upper half made of a wooden part such as cast wood to give it a decorative and luxurious feel, and a lower half made of soft synthetic resin. Although this was done in consideration of grip feel and operability, it was difficult to match the joint surface C between the upper wooden part a and the lower soft synthetic resin part.

As an example, if the woody part a is made of wood, it is formed by cutting, first the cored metal cH and the woody part a are glued together, and then (
This is inserted into a mold and the resin that becomes the soft synthetic resin part is injection molded, so if the dimensional accuracy of the wooden part a is poor, the mold may not be completely clamped, causing cracks, etc. It has the disadvantage that it damages the a and reduces its decorativeness.

In view of the above-mentioned problems, the present invention has been developed by fitting an annular molding made of a semi-hard material to the outer periphery of the annular joint surface of the rim, which is made up of an annular wood part and an annular soft synthetic resin part. By bringing it into close contact with the mold, it is possible to absorb deviations in the dimensional accuracy of the wooden part, prevent the occurrence of paris, and prevent damage to the wooden part by the mold.

Next, the structure of an embodiment of the present invention will be explained with reference to FIGS. 3 to 5 of the accompanying drawings.

Reference numeral 1 denotes a rim with a core metal 2 inside, the upper half of which is an annular wooden part 3 made of wood, cast wood, etc., with a substantially semicircular cross section and formed by cutting, and the lower half of which is an annular soft synthetic resin with a substantially semicircular cross section. part 4, and an annular joint surface 5 with a core metal 2 in the center.
It is joined with.

Furthermore, a wooden part 3 and a soft synthetic resin part 40 are provided on the outer periphery of the joint surface 5.
An annular recess 6 extending over this area is formed, and an annular molding 7 made of a semi-hard material such as polyester elastomer or polyurethane elastomer is fitted into this annular recess 6.

The outer circumferential surface of the molding 7 is made to protrude slightly further outward than the outer circumferential surface of the annular wooden part 3.

Next, the operation of the above embodiment will be explained.

In manufacturing, the cut annular wooden part 3 is glued to the core metal 2, the annular molding 7 is fitted into the annular recess 6 of this wooden part 3, and then this is placed in the fixed mold B as shown in FIG. Insert.

Next, by joining the movable mold A to the fixed mold B, a cavity C for molding the annular soft synthetic resin portion 4 is formed.

At this time, the outer periphery of the molding 7 made of semi-hard material is elastically deformed in contact with the movable mold A, sealing the cavity C and preventing the occurrence of cracks, and at least the outer periphery of the wooden part 3 is not in direct contact with the movable mold A.

That is, the wooden part 3 is prevented from being damaged because it is passed through the molding 7 made of semi-hard material.

In the above embodiment, the annular molding 7 is provided on the outer periphery of the joint surface 5 of the rim 1, but it may be provided on the outer periphery and the inner periphery.

Further, the outer peripheral surface of the annular molding 7 can be coated with metal vapor deposition or the like to enhance its decorativeness.

According to the present invention, the annular molding made of a semi-hard material is fitted onto at least the outer periphery of the annular joint surface of the rim where the annular wooden part and the annular soft synthetic resin part are joined.
When injection molding an annular synthetic resin part with this insert, the presence of a semi-rigid annular molding prevents the creation of a gap between the wood part and the cavity due to the cutting process, and also prevents the wood part from forming when the mold is clamped. It does not cause damage and does not affect the decorative effect of the wooden part.

[Brief explanation of drawings]

Fig. 1 is a side view of a conventional steering wheel, Fig. 2 is an enlarged vertical sectional view of the same rim, Fig. 3 is a side view of a steering wheel showing an example of implementation of the present invention, and Fig. 4 is a part of the same as above. The enlarged longitudinal side view and FIG. 5 are explanatory diagrams showing the state of attachment to the same mold. 1... Rim, 3... Woody part, 4...
...Soft synthetic resin part, 5...Joint surface, γ...
····mall.

Claims (1)

[Scope of utility model registration request] A steering wheel comprising a rim in which an annular wooden part and an annular soft synthetic resin part are joined via an annular joining surface, and an annular molding made of a semi-hard material is fitted onto at least the outer periphery of the annular joining surface.