JPH0623495Y2 - Steering wheel horn switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a so-called "side horn type" steering wheel horn switch in which horn button operation portions are disposed on both left and right sides of a boss portion.

<Prior Art> Conventionally, this kind of side horn type horn switch has been shown in FIGS.
2727).

In this horn switch, horn buttons 1.1 made of synthetic resin are arranged on both left and right sides of the boss portion B, respectively.

In these horn buttons 1, each operation portion 1a is projected outward from the pad 11, and two mounting holes 1b are provided on the center side of each boss portion B.

Spacers 2 made of synthetic resin, each of which has a bulged head, are inserted into the mounting holes 1b. These spacers 2 are attached to a metal auxiliary plate 7 which is screwed 8 together with a lower cover 9 to a boss plate 6. It was fixed with 3 screws. Further, between the horn button 1 and the auxiliary plate 7 in the outer peripheral portion of these spacers 2, the horn button 1 is provided.
The coil spring 4 for urging the above was disposed.

The metal plate 5 having the movable contact 5a is screwed to the lower surface between the operation portion 1a and the mounting hole 1b of each horn button 1, and the movable contact 5 is attached.
On the lower auxiliary plate 7, there is a corresponding fixed contact 7a.
Was provided. By the way, the movable side contact 5a is connected to the slip ring 10 on the lower surface of the lower cover 9 through a lead wire (not shown) from the metal plate 5 to be electrically connected to the positive side of the horn operation circuit, and the fixed side contact 7a is connected to the auxiliary plate 7 It was configured to be electrically connected to the negative electrode side of the horn operating circuit via the boss plate 6 and the boss 13.

Reference numeral 11a is a locking leg that is used to mount the pad 11 by being locked in the locking hole 9a of the lower cover 9 through the insertion hole 1c of the horn button 1.

When the horn switch is operated, the operation section 1a
By pushing down, the horn button 1 oscillates around the mounting hole 1b (spacer 2) through the biasing force of the coil spring 4, and the movable side contact 5a comes into contact with the fixed side contact 7a. , I had to operate the horn.

The reason why two mounting holes 1b are provided in each horn button 1, the spacers 2 for fixing the screws 3 are inserted in the mounting holes 1b, and the coil springs 4 are arranged around the respective spacers 2 are as follows. , Provisionally, one mounting hole 1b each,
If the spacer 2 or the like is provided in the one mounting hole 1b, the horn button 1 rolls in the front-rear direction when the horn button 1 is operated, and the vertical operation of the horn button 1 becomes unstable. is there.

<Problems to be Solved by the Invention> However, in the conventional so-called side horn type horn switch of this type, one horn button 1 is required for one operating portion 1a, and one horn button 1 But,
Two spacers 2 each, screw 3, coil spring 5, screw 8
One metal plate 5, one screw 12 and one auxiliary plate 7 are required, and the total number of components including the horn button 1 is 12 points, and the operation portion 1a is the boss portion B.
Since two steering wheels W are provided on both the left and right sides, the total number of the steering wheel W is 24, and the number of parts is large. Therefore, the man-hours and cost for assembling the horn switch itself are high, and the parts are not easily managed. .

By the way, as described in Japanese Utility Model Laid-Open No. 52-88125, the left and right horn buttons are composed of a continuous integral body and are attached to a pad. Further, in Japanese Utility Model Laid-Open No. 60-115146. As described, in the center of the horn button that is composed of the integral body, an integral hinge part is formed to allow the operation parts on both left and right sides to be bent downward respectively, and the number of parts is reduced. It is conceivable to form a side horn type horn switch by reducing the number of assembly steps and the like.

However, even with the above configuration, when using the horn button with the left and right operation parts integrated, when installing the horn switch above the boss of the steering wheel, attach the horn button to the pad and The horn button is arranged together with the pad on the steering wheel main body side by attaching a predetermined contact to the main body side and the horn button side, interposing a coil spring at a predetermined position, and using screwing or the like. .

That is, in the above configuration, when the side horn type horn switch is assembled to the steering wheel main body, the contacts, which are small parts, are sequentially arranged on the large steering wheel main body side and the horn button side, and between them. Since a small coil spring is arranged on the steering wheel to assemble, the number of parts of the horn switch itself can be reduced, but it cannot contribute to simplification of the assembly work on the steering wheel body side.

This invention solves the above-mentioned problems, and in this type of side horn type horn switch, the number of parts can be reduced and the assembling workability is improved when the horn switch is assembled on the steering wheel body side. It is an object of the present invention to provide a horn switch for a steering wheel that can reduce the number of assembling steps and the assembling cost.

<Means for Solving Problems> A horn switch of a steering wheel according to the present invention is configured such that a horn switch arranged on an upper portion of a boss includes a pad, a horn button, a coil spring, and an auxiliary plate. The pad is provided with a locking leg for mounting the horn button in the center of the lower surface, and holding protrusions extending downward and stoppers abutting the horn button are provided near both left and right sides, and the horn button is provided with the pad. Formed of a synthetic resin integral body having left and right operating parts projecting from the center, and a locking hole for inserting and locking the locking leg of the pad is provided near the center, and the locking hole and the left and right operating parts are provided. And an integral hinge portion formed in a direction orthogonal to the swinging surface of each of the operating portions during operation, and the integral hinge portion and A metal having an insertion hole for inserting the holding protrusion of the pad between the left and right operation parts, a spring seat for the coil spring, and a movable contact near the lower surface of the left and right operation parts. The plate is screwed, and the auxiliary plate is screwed to the holding protrusion of the pad through the coil spring arranged in the spring seat of the horn button, and fixed in correspondence with the movable side contact of the horn button. A horn switch of a steering wheel configured to have side contacts, the pad, the horn button, the coil spring, and the auxiliary plate being integrally assembled in advance and assembled to the steering wheel body side.

<Operation and effect of device> In the horn switch of the steering wheel according to the present invention, the horn button to which the metal plate having the movable side contact is attached is inserted into each insertion hole and the retaining projection is inserted into the engaging hole. Lock the legs and attach to the pad. After that, the coil spring is arranged on the spring seat of the horn button, and the auxiliary plate is arranged below and the auxiliary plate is screwed to each holding projection, whereby the assembly of the horn switch can be formed. The solid body should be attached to the steering wheel body side.

Further, in the horn switch according to the present invention, the horn button is formed of a synthetic resin integral body including the left and right operation parts, and is integrated by the integral hinge part formed at a predetermined position when the left and right operation parts are operated. It is possible to swing up and down in a stable state without rolling.

Therefore, it is possible to reduce the number of parts such as the spacer, the spacer mounting screw, and the coil spring, which have been conventionally required, by half.

Further, in the horn switch according to the present invention, the horn switch to be assembled to the steering wheel main body side can be pre-assembled and prepared, and the assembly can be assembled to the steering wheel main body side. As compared with the case where a horn switch is mounted on a large steering wheel body while arranging a small coil spring and a contact, the work for mounting the horn switch is facilitated.

Therefore, in the steering wheel horn switch according to the present invention, the number of parts can be reduced in the side horn type horn switch of this type, and the assembling workability is improved when the horn switch is mounted on the steering wheel body side. You can let
It is possible to reduce the assembly man-hour and assembly cost.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

The horn switch 20 of the embodiment is attached to the steering wheel body W1 above the boss portion B of the steering wheel W as shown in FIGS. 22 are provided.

The steering wheel body W1 refers to a portion of the steering wheel W other than the horn switch 20,
In the case of the embodiment, the directly assembled portion of the horn switch 20 is the portion of the boss plate 36 which is the core metal of the boss portion B.

The horn switch 20 of the embodiment has a pad 31,
The horn button 21, the coil spring 34, and the auxiliary plate 37 are provided.

The horn button 21 is made of synthetic resin such as PP,
As shown in FIGS. 2 and 3, it is a substantially square annular body with its center bent forward when viewed from above. In addition, as shown in FIGS. 1 and 4, the horn button 21 is provided on both left and right operation parts 2
The cover 22a made of synthetic resin such as ABS is fixed to the upper surface of the 2.22 so that it can be made lighter by making it hollow, but of course the cover 22a is used in consideration of the shape of the operating portion 22. You don't have to. Also, on the lower surface of the portion of the horn button 21 extending in the left-right direction,
As shown in FIGS. 3 and 5, reinforcing ribs 21a are provided in a protruding manner.

Two locking holes 23 are provided in the center of the horn button 21 in order to mount the horn button 21 on the pad 31 that covers the upper portion of the boss portion B that is the member to be mounted. These locking holes 23 are formed by the locking legs 3 on the back surface of the pad 31.
A locking step portion 23a is provided on the inner side surface so that 1a can be locked (see FIGS. 4 and 6).

Then, each locking hole 23 and each left and right operation part 22.2
2, an integral hinge portion 24 is formed in the vicinity of the locking hole 23 in the direction orthogonal to the swing surface when the operation portion 22 is operated, having a cutout groove 24a on the lower surface side of the horn button 21. (See FIGS. 1 to 4).

Two spring seats 25 are provided near the center on both the left and right sides of the horn button 21, each spring seat 25 protruding toward the upper surface and provided with a stepped insertion hole 25a on the inner peripheral surface. These spring seats 2
As shown in FIG. 1, a holding protrusion 31b for fixing an auxiliary plate 37, which will be described later, to the pad 31 with a screw 38 is inserted into the insertion hole 25a of the holding protrusion 31b.
A coil spring 34 is arranged to urge the auxiliary plate 37 from the auxiliary plate 37 so as to separate the left and right operation portions 22 side of the horn button 21 upward at the outer peripheral portion. The coil spring 34
The left and right operation parts 22 side of the horn button 21 urged by
Stoppers 31c, 31c projecting from the back of the pad 31
Due to this, the separation distance is regulated.

Further, as shown in FIGS. 1 to 4, a movable contact 35 is provided on the lower surface of each of the left and right operation parts 22 of the horn button 21.
A metal plate 35 provided with a is fixed with a screw 42. Each of these metal plates 35 is connected to a lead wire 44, and the lead wire 44 is connected to a slip ring 40 disposed on the lower surface of the lower cover 39 as shown in FIG. It is configured to conduct to the positive electrode side in the circuit. In addition, the screw 42 that stops the metal plate 35 is used for the cover body 22 of the operation unit 22.
It also serves to fix a.

Below each movable contact 35a, as shown in FIG. 1, a fixed contact 37a provided on an auxiliary plate 37 made of sheet metal is arranged, and this auxiliary plate 37 has a holding projection as described above. A screw 38 is fixed to the pad 31 via 31b. An auxiliary piece 37b made of a leaf spring, which is pressed against the boss plate 36, is caulked and fixed to the lower surface of the center of the auxiliary plate 37, and the fixed side contact 37a is inserted through the auxiliary piece 37b, the boss plate 36, and the boss 43. , Is configured to conduct to the negative electrode side of the horn operation circuit.

The assembling work of the horn switch 20 of the embodiment will be described. First, the horn button 21 in which the cover body 23a and the metal plate 35 are assembled with the screw 42 is inserted into the insertion holes 25a of the holding protrusions 31b. At the same time, the locking legs 31 a are locked in the respective locking holes 23, and the horn button 21 is attached to the pad 31.

After that, by mounting the coil spring 34 in each spring seat 25, setting the auxiliary plate 37, and screwing the screw 38 to each holding projection 31b, the auxiliary plate 37 is attached to the pad 31. The horn switch 20 can be assembled.

When the horn switch 20 is assembled to the steering wheel body W1, the lead wire 44 is connected to the slip ring 40, and the auxiliary plate 37 is connected.
The pad 31 may be arranged on the boss portion B so that the auxiliary piece 37b is pressed against the boss plate 36.

As shown in FIG. 6, the boss plate 36 has an engaging member 4 having an opening 46a at the rear (left side in FIG. 6).
6 is fixed, and a hook piece 47 is fixed to a portion of the spoke S (not shown) extending to the boss B.
On the pad 31 side, an engagement protrusion 32 having a check claw 32a is provided.
And a substantially L-shaped hook piece 33 are screwed in place. Therefore, the pad 31 is assembled at a predetermined position by the engagement between the hook piece 33 and the hook piece 47 and the engagement between the engagement projection piece 32 and the engagement member 46.

Next, the operation mode of the horn switch 20 assembled in this way will be described. For example, if the operation portion 22 on the right side is pushed up, the horn button 21 will be locked in the locking hole 2.
The three parts are attached and fixed to the pad 31, and the operation part 22 side swings up and down around the integral hinge part 24 between the locking hole 23 and the biasing force of the coil spring 34. , The movable contact 35a is brought into contact with the fixed contact 37a to operate the horn. At that time, the vertical swinging state is such that the integral hinge portion 24 is formed in a direction orthogonal to the swinging surface of the operating portion 22,
Even if a plurality of conventional spacers for preventing rolling in the front-rear direction are not used, they will oscillate in the vertical direction in a stable state without rolling. And the said aspect is the same also about the left operation part 22.

Therefore, in the horn switch 20 of the embodiment, the left and right operation parts 22 and 22 are connected via the integral hinge part 24.
One horn button 21 and one horn button 21 and one auxiliary plate 37,
Two coil springs 34, screws 38, metal plate 3
5 · Screw 42, 10 points in total, and cover body 22
Even if the two points of a are added, it is 12 points, which can be reduced to half compared with the 24 points of the conventional horn switch.

Further, in the embodiment, the horn switch 20 to be assembled to the boss plate 36 of the steering wheel body W1 can be assembled and prepared in advance, and the assembly can be assembled to the steering wheel body W1 side. As compared with the case where a horn switch is mounted on a large steering wheel body while arranging coil springs and contacts, the work of mounting the horn switch 20 is easier, It has the same effect as described above.

In the embodiment, the horn button 21 has a cover 22a.
However, as described above, if the operation portion 22 is shaped, for example, as shown in FIG. 8 and the like, it is not necessary to use the cover body 22a. The score can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a horn switch showing an embodiment of the present invention, which is a sectional view taken along the line I--I of FIG. 2, FIG. 2 is a plan view of a steering wheel of the embodiment, and FIG. 3 is the same embodiment. Rear view of the horn button of Fig. 4, Fig. 4 is a sectional view taken along line IV-IV of Fig. 3,
FIG. 5 is a V- of FIG. 2 in the horn button of the same embodiment.
FIG. 6 is an end view showing the V portion, FIG. 6 is a sectional view taken along line VI-VI of FIG.
FIG. 7 is a plan view showing a conventional horn switch, and FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 20 ... Horn switch, 21 ... Horn button, 22 ... Operation part, 23 ... Locking hole, 24 ... Integral hinge part, 25 ... Spring seat, 25a ... Insertion hole, 31 ... Pad, 31a ... Locking leg, 31b ... Holding protrusion, 31c ... Stopper, 34 ... Coil spring, 35 ... Metal plate, 35a ... Movable side contact, 37 ... Auxiliary plate, 37a ... Fixed side contact, 38 ... screw, B ... boss part, W1 ... steering wheel body, 36 ... boss plate.

Claims (1)

[Scope of utility model registration request] 1. A horn switch disposed on an upper portion of a boss portion is configured by including a pad, a horn button, a coil spring, and an auxiliary plate, and the pad is a lock for mounting the horn button at a center of a lower surface. Along with the legs, in the vicinity of both left and right sides, a holding projection extending downward and a stopper that abuts on the horn button are provided, and the horn button is made of a synthetic resin integrally provided with left and right operation portions protruding from the pad. A locking hole is formed in the center for inserting and locking the locking leg of the pad, and between the locking hole and the left and right operation parts, the rocking surface of each of the operation parts at the time of operation is formed. It also has an integral hinge part formed in a direction orthogonal to each other, and an insertion hole for inserting the holding protrusion of the pad between the integral hinge part and the left and right operation part. A coil plate provided with a spring seat for the coil spring, further having a metal plate having a movable side contact screwed near the lower surface of the left and right operation part, wherein the auxiliary plate is arranged on the spring seat of the horn button. The pad, the horn button, the coil spring and the auxiliary plate are preliminarily provided with a fixed side contact corresponding to the movable side contact of the horn button while being screwed to the holding protrusion of the pad through a spring. A horn switch for a steering wheel that is integrally assembled and assembled on the steering wheel body side.