JPH0438434Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention includes a first assembly unit consisting of a first horn switch body and a first horn pad, and a second horn switch body and a second horn pad. The present invention also relates to a steering wheel in which a second assembly unit consisting of an impact energy absorber to which a second horn switch body and a second horn pad can be respectively installed.

<Prior Art> Conventionally, there is a steering wheel shown in FIGS. 10 to 15 that does not require time and effort to assemble a horn switch body (see Japanese Utility Model Application No. 133530/1983).

The steering wheel body HO in this steering wheel WO has a boss plate 2 in which the boss 1 in the boss part B is arranged at the center.
A synthetic resin covering part 3 formed integrally with the covering layer of the ring part R and the spoke parts S covers the ring part R and the spoke parts S.

At predetermined positions of the covering part 3, there are formed three switch assembly parts 4 for assembling the horn switch body 8, and three cylindrical pad assembly parts 7 for assembling the locking legs 12a of the horn pad 12. has been done. The switch assembly part 4 is composed of a claw part 5 and a stepped convex part 6 (10th, 11th, 12th, 15th
(see figure).

The horn switch body 8 is composed of a movable contact sheet 9 made of a metal plate spring and having a substantially triangular shape, and a fixed contact sheet 10 made of a sheet metal and having a substantially triangular shape with one side cut off (Figs. 8 and 9). (see figure).

As shown in FIGS. 8 and 12, the movable contact sheet 9 is provided with contacts 9a at three predetermined locations, and the small diameter portion 6a of the stepped convex portion 6 of the covering portion 3 can be inserted into the three predetermined locations. As shown in FIGS. 8, 10, and 13, a tongue piece 9c extends downward for a predetermined length from a predetermined portion.
is formed. Further, the fixed contact sheet 10 has a predetermined three-dimensional shape, as shown in FIGS.
A contact point 10a corresponding to the contact point 9a of the movable contact sheet 9 is formed at a predetermined 3 points.
Small diameter portion 6a of stepped convex portion 6 in covering portion 3 at a location
A hole 10b is formed through which the tongue can be inserted, and as shown in FIGS. 9, 10, and 14, a tongue piece 10c is formed that extends downward a predetermined length from a predetermined portion.

And with this steering wheel WO,
In the steering wheel body HO, first, the small diameter portions 6a of the stepped convex portions 6 are inserted into each hole 10c, and the fixed contact sheet 10 is placed on the upper end surface of the large diameter portion 6b of each stepped convex portion 6. After that, an insulating annular spacer 11 (10th, 1st
(see Fig. 2), and further insert the small diameter portion 6a of the stepped convex portion 6 into each hole 9b to arrange the movable contact sheet 9 on each spacer 11.
The peripheral edge of the movable contact sheet 9 is locked to the claw part 5, and the horn switch body 8 is disposed on the steering wheel body HO. In addition, Figures 10 and 15
3a and 3b shown in the figure are fixed contact sheets 1
0, and the vicinity of the contact 10a is a support base part formed on the covering part 3 that supports 0, and the support base parts 3a,
3b (12th, 1st
(See Figure 5).

At that time, the horn switch body 8 can be assembled to the steering wheel body HO by simply arranging the fixed contact sheet 10, the spacer 11, and the movable contact sheet 9 in sequence. The horn switch body 8 Wiring is also done at the same time, and the horn switch body 8 can be assembled without much effort. The tongue piece 9c comes into contact with the slip ring 13 through the insertion hole 3c of the covering part 3, as shown in FIGS. 13 and 15.

When used as a steering wheel WO, the locking legs 12a are further locked to each pad assembly portion 7 of the covering portion 3, and the horn pad 12 is locked.
It is used by assembling it into the steering wheel body HO.

Furthermore, on the back side of the horn pad 12, there is a locking leg 12.
In addition to a, a protrusion 12b is formed so that the vicinity of the contact point 9a of the movable contact sheet 9 can be pressed down, and when the horn pad 12 is pressed down, the protrusion 12b
The horn can be activated by pressing down the contacts 9a of the movable contact sheet 9 so that they come into contact with the contacts 10a of the fixed contact sheet 10 (see FIG. 12).

<Problems to be solved by the invention> In the conventional steering wheel WO, in order to absorb the energy when an impact force is applied to the upper surface of the pad 12, a JP-A-1989-100 is installed in the boss part B.
It is conceivable to provide a plastically deformable impact energy absorber (hereinafter referred to as E/A body) as described in Japanese Patent No. 15238.

At that time, it is desirable to attach the E/A body directly to the boss plate 2, which is easier to obtain flatness than the covering part 3, but in the conventional steering wheel body HO, the exposed part on the upper surface of the boss plate 2 is attached to the boss 1. The E/A body is limited to the vicinity of the center of the periphery, and the E/A body is disposed near the center of the periphery of the boss 1 on the boss plate 2 (see FIG. 15).

However, usually, the boss plate 2 near the boss 1 is provided with a puller hole 2a used for removing the steering wheel WO from the vehicle, and the back side of the boss plate 2 near the boss 1 is provided with a puller hole 2a, which is used for removing the steering wheel WO from the vehicle.
A slip ring 13 is provided (10th,
(See Figures 11 and 15).

For this reason, this type of E/A body is usually screwed to a predetermined location, but it is not possible to provide a mounting hole in the boss plate 2 near the boss 1, and as a result, conventional steering With the wheel body HO, it could not be used as a steering wheel with the E/A body attached.

This invention solves the above-mentioned problem, and allows the E/A body to be installed without any problems, and can be used both as a steering wheel with an E/A body attached and as a steering wheel without an E/A body attached. The present invention aims to provide a steering wheel that can be used in two types, with and without an E/A body.

<Means for Solving the Problems> The steering wheel according to this invention includes a first assembly unit consisting of a first horn switch body and a first horn pad, and a second horn switch body and a second horn pad. and a second assembly unit consisting of an E/A body to which a second horn switch body and a second horn pad can be attached, respectively, the steering wheel is provided with a boss located at the center of the boss part. forming a plurality of switch assembly parts for assembling the first horn switch body and pad assembly parts for assembling the first horn pad, respectively, on a synthetic resin covering part that covers the upper surface of the boss plate; On the upper surface of the boss plate, an exposed part is formed by cutting out the covering part between the switch assembly part and the pad assembly part radially outward with the boss as the center, and a mounting hole is provided in the exposed part, and the E/A By forming the body as a mounting seat that can be screwed,
This solves the problems mentioned above.

<Operations and effects of the invention> In the steering wheel according to this invention, on the upper surface of the boss plate, an exposed portion extending in the radial direction around the boss between the switch assembly part and the pad assembly part for the first assembly unit is provided. A mounting seat is provided for mounting the E/A body.

Therefore, the mounting hole for mounting the E/A body on the mounting seat does not need to be provided near the boss 1 on the boss plate, so the E/A body can be mounted without any trouble without affecting the puller hole or slip ring. I can do it.

In addition, if the E/A body is not installed, the first assembly unit consisting of the first horn switch body and the first horn pad can be assembled to the switch assembly section or pad assembly section, and the E/A body can be installed. No steering wheel can be formed.

Therefore, in the steering wheel according to this invention, the E/A body can be attached without any problem, and it can be used both as a steering wheel with the E/A body attached and as a steering wheel without the E/A body attached. Can be, E/A
It can be used as two types of steering wheels, with and without a body.

<Example> Hereinafter, an example of this invention will be described based on the drawings. Note that the same members as in the conventional example are given the same reference numerals.

The steering wheel main body H1 of the embodiment shown in FIG. A covering layer 23 made of synthetic resin such as the like is formed. The boss plate 22 of the embodiment is substantially the same as the conventional boss plate 2, but as shown in FIGS. 1 and 4, it has mounting holes 22d to which support legs 19 of the E/A body 18, which will be described later, are screwed. The difference is that an insertion hole 22e is formed through which the terminal 33a of the slip ring 33 is inserted.

The covering part 23 has a claw part 25 and a small diameter part 26 at predetermined positions as in the past so that the same horn switch body 8 and horn pad 12 as in the past can be assembled.
A switch assembly section 24 consisting of a stepped convex section 26 having a large diameter section 26b and a pad assembly section 27 are formed, as well as support base sections 23a and 23b and an insertion hole 23c.

That is, as shown in FIG. 7, in the steering wheel main body H1 of the embodiment, the same horn switch body 8 as the conventional one is used as the first horn switch body 8, the same horn pad 12 as the conventional one is used as the first horn pad 12, and the same horn switch body 8 as the conventional one is used as the first horn switch body 8. 1 horn switch body 8 and the first
The switch assembly part 24 and the pad assembly part 24 of the covering part 23 are arranged so that the structure consisting of the horn pad 12 can be used as a first assembly unit U1 and a steering wheel W1 without the E/A body 18 described later. This allows the first assembly unit U1 to be assembled in the same manner as before.

In the covering part 23 of the embodiment, unlike the conventional covering part 3, there are notches extending radially outward around the boss 1 at four locations between the switch assembly part 24 and the pad assembly part 27. A portion 23d is formed. This notch 23d is, of course, the boss plate 2.
It extends to a position radially outward from the puller hole 22a of No. 2 and the slip ring 33 disposed on the back side of the boss portion B.

Attachment holes 22d are formed in the four exposed portions 22b on the upper surface of the boss plate 22 exposed by the cutout portions 23d, and these exposed portions 22d are connected to the E/A body 18. A mounting seat 22c is used.

As shown in FIGS. 2 to 4, this E/A body 18 constitutes a second assembly unit U2 together with the second horn switch body 28 and the second horn pad 32, and also includes the second horn switch body 28 and the second horn pad 32. 28 and the second horn pad 32 can be assembled.

As shown in FIGS. 3, 4, and 6, this E/A body 18 includes a fixed contact sheet 30 made of sheet metal that constitutes the second horn switch body 28, and welding or the like on the lower surface of the peripheral edge of the fixed contact sheet 30. It consists of four support legs 19 made of sheet metal that are fixed to each other. Each of these support legs 19 has a threaded hole 19a formed in the vertical direction in the lower part thereof. Then, as shown in FIG. 4, by screwing the screws 20 into each screw hole 19a from below through the mounting hole 22d of the boss plate 22,
The E/A body 18 is assembled to the steering wheel body H1.

As shown in FIGS. 2 to 5, the second horn switch body 28 includes, in addition to a fixed contact sheet 30, two movable contact sheets 29 made of metal plate springs and a presser plate 31 made of sheet metal.

The movable contact sheet 29 is riveted 36 to the fixed contact sheet 30 using two annular insulating spacers 34 and 35, respectively, and the vicinity of the contact point 29 at the tip is fixed to the fixed contact sheet 3.
0 (see FIG. 5). When one of these movable contact sheets 29 is riveted, a conductive wire 37 is connected to it, as shown in FIGS. Can be connected to the positive side of the operating circuit.

The fixed contact sheet 30 is formed with contacts 30a corresponding to the contacts 29a of the movable contact sheet 29, and is also provided with a mounting hole 30b for mounting the movable contact sheet 29 (see FIG. 6). Furthermore, in FIG. 6, 30c
is a central hole for a nut used when attaching the steering wheel W2 with the second assembly unit U2 assembled to the steering shaft of a vehicle (not shown), and 30d is an insertion hole for the puller hole 22a of the boss plate 22; 30e is a sliding hole that allows a flanged spacer 38, which will be described later, to slide therein. Furthermore, since the fixed contact sheet 30 is connected to the boss plate 22 via the support legs 19,
It can be connected to the negative pole side of the horn operating circuit.

As shown in FIGS. 3 and 5, the holding plate 31 is in contact with the upper surface of the contact point 29a of each movable contact sheet 29, and a flanged spacer 38 made of synthetic resin is inserted from below each sliding hole 30e of the fixed contact sheet 30. The distance from the fixed contact sheet 30 is regulated by being fixed with a screw 39. In addition, the presser plate 31 includes
As shown in FIGS. 2 and 3, a cylindrical horn pad assembly portion 31a is formed at a predetermined position to lock a locking leg 32a protruding from the back surface of the second horn pad 32. Note that, as shown in FIG. 2, the holding plate 31 is also formed with a center hole 31b and an insertion hole 31c similar to those of the fixed contact sheet 30.

In addition, the E/A body 18 is
As shown in FIG. 3, the second horn pad 32 that is assembled into the second horn pad 32 has, in addition to the locking leg 32a, a protrusion 32b that comes into contact with the presser plate 31 at a predetermined position. Therefore, when the second horn pad 32 is pressed down, the movable contact sheet 29 is lowered via the presser plate 31, bringing its contacts 29a into contact with the contacts 30a of the fixed contact sheet, thereby enabling the horn to operate.

When assembling the second assembly unit U2 to the steering wheel main body H1 of the embodiment, in advance,
The movable contact sheet 29 and presser plate 31 are attached to the E/A body 18, and the second horn switch body 2 is assembled.
8, and connect the conductor 37 to the slip ring 3.
At the same time, the supporting leg 19 of this E/A body 18 is fixed with a screw 20 from the back side using the mounting hole 22d of the mounting seat 22c in the boss plate 22, and the second horn is attached to the steering wheel main body H1. E/ with switch body 28
Assemble A body 18. After that, presser plate 31
By locking the locking leg 32a of the second horn pad 32, the second assembly unit U2 can be assembled to the steering wheel main body H1, forming the steering wheel W2 provided with the E/A body 18. I can do it.

At that time, the support legs 19 of the E/A body 18 are
The E/A body 18 can be attached to the steering wheel body H1 without any trouble because it is attached to the attachment seat 22c located radially outward from the puller hole 22a in the boss plate 22 or the slip ring 33 on the back side with the boss 1 as the center. can.

Therefore, in the steering wheel main body H1 of the embodiment, the E/A body 18 can be attached without any trouble as a steering wheel W2.
In addition, as described above, it can be used as a steering wheel W1 without the E/A body 18 attached, and the same effects as described in the section of the functions and effects of the above-mentioned invention are produced.

Furthermore, the steering wheel body H of the example
In No. 1, when the E/A body 18 is attached, since it is attached to the metal boss plate 22 with good planar accuracy, it can be installed without tilting the E/A body 18, the second horn pad 32, etc. .

The E/A body 18 of the embodiment is shown as being composed of the fixed contact sheet 30 and the support legs 19, both of which are made of sheet metal.
The E/A body may be constructed by disposing a fragile member such as a hard urethane foam inside the inside surrounded by.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a steering wheel body showing an embodiment of this invention, Fig. 2 is a plan view of the same embodiment with a second assembly unit installed, and Fig. 3 is a section shown in Fig. 2. 4 is a partially omitted sectional view of FIG. 2, and FIG. 5 is a - end view of FIG. 2.
6 is a plan view of the E/A body used in the same embodiment, FIG. 7 is a plan view of the same embodiment with the first assembly unit installed, and FIG. 8 is a plan view of the first horn switch body. 9 is a plan view showing the fixed contact sheet in the first horn switch body, FIG. 10 is a plan view of a conventional steering wheel, and FIG. 11 is a plan view showing the fixed contact sheet in the first horn switch body. 12 is a - end view of Fig. 10, Fig. 13 is a - end view of Fig. 10, and Fig. 14 is a - end view of Fig. 10.
The end view and FIG. 15 are plan views showing a conventional example. 1...Boss, 8...1st horn switch body, 1
2...First horn pad, 18...E/A body, 2
2...Boss plate, 22b...Exposed part, 22c
...Mounting seat, 22d...Mounting hole, 23...Coating part, 24...Switch assembly part, 27...Pud assembly part, 28...Second horn switch body, 32...
Second horn pad, B... Boss part, H1... Steering wheel body, U1... First assembly unit, U2... Second assembly unit, W1/W2...
steering wheel.

Claims (1)

[Claims for Utility Model Registration] A first horn switch body and a first
A first assembly unit consisting of a horn pad, and a second assembly unit.
A steering wheel in which a horn switch body, a second horn pad, and a second assembly unit consisting of an impact energy absorber that enables the second horn switch body and the second horn pad to be respectively installed, A switch assembly part for assembling the first horn switch body to a synthetic resin covering part covering the upper surface of the boss plate in which the boss is disposed at the center of the boss part, and a pad for assembling the first horn pad. a plurality of assembly parts are formed, and an exposed part is formed on the upper surface of the boss plate by cutting out the covering part between the switch assembly part and the pad assembly part radially outward with the boss as the center. A steering wheel, wherein the exposed portion is provided with a mounting hole and is formed as a mounting seat to which the impact energy absorber can be screwed.