JPS644613Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a horn switch attached to a boss portion of a steering wheel.

As this type of horn switch, there is a conventional horn switch as shown in FIG. Short fence-shaped contact plates 2 are fixed at symmetrical positions sandwiching bosses on a switch support 1 made of insulating synthetic resin, etc., and an insulating sheet (made of synthetic resin or rubber) is fixed approximately at the center of each contact plate 2. ) 4 and 5 to the horn spring 7 and the wiring terminal 8 connected thereto.
are fastened with rivets 9 to form a switch element assembly, and furthermore, a horn pad 10 is supported by a horn spring 7 via a pressing rib 10a and guided so as to be movable in parallel with the axis, and arranged on the switch support 1. It is set up. Here, since the contact plate 2 is screwed at both ends,
Two screws 11 are required for each plate, which increases the number of parts and the number of assembly steps. Further, a mounting location for a screw is required on the switch support 1 outside the contact plate contact 2a, making it difficult to make the horn switch compact.

In view of the above, the object of this invention is to provide a steering wheel horn switch that can reduce the number of parts and assembly man-hours, and can be easily made compact.

The horn switch of this invention differs from the above conventional example in that the rivet has a hollow part, and a screw or fastener is inserted into the hollow part to attach the integrated switch element assembly to the switch support via the rivet. The above purpose is achieved by fixing.

An embodiment of this invention will be described below with reference to FIGS. 2 and 3.

As in the conventional example, each contact plate 12 has
A horn spring 17 and a wiring terminal 18 connected thereto are fixed with rivets 19 via insulating sheets 14 and 15 to form a switch element assembly, and a horn pad 20 is supported by the horn spring 17 and is parallel to the axis. It is movably guided and arranged on a switch support 21.

This embodiment differs from the conventional example in that the rivet 19 has a hollow part, and screws 22 are inserted into the hollow part to secure the rivet 1 after both ends are caulked.
The switch element assembly integrated at 9 is fixed to an insulating switch support 21 made of synthetic resin or the like. Therefore, only one screw 22 is required for each contact plate 12, leading to a reduction in the number of parts and assembly man-hours for the horn switch as a whole. Furthermore, since the contact plate 12 is not screwed at both ends, there is no need to provide extra space on the switch support 21 for screwing, and the horn switch can be made more compact. Since the contact plate 12 is fixed at one location in the center, it is desirable to provide a positioning recess on the switch support 21 so that the plate 12 does not move when screwed. In the above embodiment, a screw is used as an example of the fixing means, but a snap fastener made of synthetic resin may also be used. Also,
Of course, this invention can also be applied to a structure in which there is a slight gap between the horn spring and the pressing rib, and the horn pad is supported by a spring means other than the horn spring.

In the horn switch of the above embodiment, by pressing the horn pad 20 against the spring force of the horn spring 17, the contact 17a of the horn spring 17 comes into contact with the contact 12a of the contact plate 12 and conducts, so that the horn sounds. be able to.

Since the steering wheel horn switch of this invention has the above-described configuration, the number of parts and assembly man-hours can be reduced, and the horn switch can be easily made compact.

[Brief explanation of drawings]

Fig. 1 is a partially omitted sectional view showing a conventional example of a horn switch, Fig. 2 is a partially omitted sectional view showing an embodiment of the horn switch according to this invention, and Fig. 3 is an enlarged sectional view of a part of Fig. 2. be. 1, 21... Switch support, 2, 12... Contact plate, 4, 5, 14, 15... Insulating sheet, 7, 17... Horn spring, 8, 1
8... Wiring terminal, 9, 19... Rivet, 10,
20... Horn pad, 11, 22... Screw.

Claims (1)

[Scope of Claim for Utility Model Registration] Short fence-shaped contact plates are fixed at symmetrical positions sandwiching the boss on an insulating switch support that is attached to the boss part of the steering wheel, and approximately at the center of each contact plate. In a horn switch in which a switch element assembly is integrally constituted by riveting a horn spring formed of a leaf spring and a wiring terminal connected thereto through an insulating sheet, the rivet has a hollow part, and the hollow part A steering wheel horn switch, characterized in that the integrated switch element assembly is fixed to the switch support via the rivets by inserting screws or fasteners into the parts.