JPS6237802Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a steering wheel for an automobile.

When an impact force is applied to the steering wheel, the deformation characteristics of the ring part of the wheel differ depending on the part receiving the impact force, and the deformation characteristics are directional, so the relationship between the side applying the impact force and the wheel ring part is different. Local contact is likely to occur.

The purpose of this invention is to provide a vehicle steering wheel in which when an impact is applied to the ring portion of the steering wheel, the side that applies the impact can make full contact with the wheel ring, without increasing costs. There is a particular thing.

The above object is achieved by removing the resin material from the outer periphery of the boss portion of the steering wheel and forming a hollow portion therein.

The configuration of this invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a plan view of an automobile steering wheel 1, in which reference numeral 2 denotes a wheel ring portion;
3 indicates a boss portion, and 4 indicates a spoke. The boss portion 3 is integrated with the core material 2a of the ring portion 2 through, for example, three spoke core materials 4a so as to be located at the center of the wheel ring portion 2. Figure 2 is an enlarged representation of a part of Figure 1, and - of Figure 2.
As is clear from FIG. 3, which shows a line cross section, an inner serration 7 is formed in the center hole of the boss portion 3, and this is fitted into an outer serration of a steering main shaft (not shown). They are coupled to each other so that torque can be transmitted.

Now, in the steering wheel 1 in this embodiment, the above-mentioned wheel ring portion 2 and spokes 4 are integrally molded from a resin material 5.
That is, the core material 2a of the wheel ring portion 2 and each core material 4a of the spokes 4 are covered with the resin material 5 described above. Further, although this resin material 5 is originally formed continuously up to the outer peripheral surface of the boss portion 3, in this embodiment, the resin material at the outer peripheral portion of the boss portion 3 is removed and the boss portion is formed there. 3 and a portion of the spoke core material 4a constitute an exposed hollow portion 6. As a result, the boss portion 3 and the wheel ring portion 2 in the hollow portion 6 are connected only by the aforementioned spoke core materials 4a. In addition, the resin material 5
The resin material 5 remains in an annular shape on the outer circumference 5' of the hollow portion 6, and this outer circumference 5' interconnects the spoke core materials 4a. Note that this outer peripheral portion 5' may be reinforced by embedding a metal annular member, for example.

When an impact force acts on the steering wheel 1 configured as described above, the boss portion 3 fixed to the steering main shaft (not shown)
and the hollow portion outer peripheral portion 5′ of the resin material 5, that is, the spoke core material 4a in the hollow portion 6.
is deformed or broken. As a result, the wheel ring portion 2 tilts according to the direction of impact force,
Local contact between the wheel ring portion 2 and the body of the driver, for example, on the impact side is avoided. At the same time, if the load is concentrated on any one of the spokes 4, the outer periphery 5' of the hollow portion 6 in the resin material 5 that interconnects the spoke core materials 4a will , other spoke core materials are also deformed or broken accordingly. Therefore, substantially uniform deformation characteristics are obtained no matter where on the steering wheel 1 an impact is applied, and the steering wheel 1 is prevented from stroking along the axial direction of the steering main shaft.

Note that it is also possible to control the above deformation characteristics by making holes in the spoke core material 4a located in the hollow portion 6 and changing its section modulus.

As described above, the present invention constructs a hollow part by removing the resin material from the outer periphery of the boss part of the steering wheel to expose the boss part and a part of each spoke core material, and also By leaving the resin material in an annular shape on the outer periphery and interconnecting the spoke core materials, each spoke core material is exposed in the hollow portion of the resin material depending on the direction of impact force on the steering wheel. If the resin material that interconnects these spoke core materials is easily deformed (or broken) and the load is concentrated on one of the spoke core materials at the same time, The outer periphery of the hollow portion allows other spoke core materials to follow and deform. As a result, the steering wheel deforms in accordance with the direction in which the impact force is applied, and local contact between the impact application side and the steering wheel side can be avoided without increasing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a plan view of the steering wheel, Fig. 2 is a plan view showing an enlarged part of Fig. 1, and Fig. 3 is a cross-sectional view taken along the line - It is a diagram. 1...Steering wheel, 2...Wheel ring part, 3...Boss part, 4...Spoke, 5...
...Resin material, 6...Hollow part.

Claims (1)

[Scope of utility model registration request] A boss portion attached to the steering main shaft so as to be able to transmit rotational force and a core material of the steering wheel portion are integrally connected by a plurality of spoke core materials, and each spoke core is connected from the outer periphery of the boss portion to the core material of the steering wheel portion. The steering wheel is integrally molded with a resin material over the core material of the spoke part and the core material of the wheel ring part. A steering wheel for a vehicle comprising an exposed hollow portion, and a resin material is left in an annular shape on the outer periphery of the hollow portion to interconnect the spoke core materials.