JPH03272528A - Steering wheel switch for vehicle - Google Patents

Abstract

PURPOSE:To secure electric continuity in spite of rotation of a steering wheel, set the size compact, and reduce the number of parts by providing a circular terminal electrically connected with the battery side to a contact electrically connected with an alarm switch provided on a steering wheel by a resilient member integrally moulded with a switch assembly. CONSTITUTION:A switch assembly 15 is provided around a steering wheel shaft 1 under a steering wheel 2, and a rotary member, having a cancellation cam 20 to rotate integrally with the steering wheel 2 and restore a direction indicator lever to a neutral position automatically by rotation of the steering wheel 2 when the lever is operated, is provided in an inner space part of the switch assembly 15. A contact 8 electrically connected to an alarm switch 12 provided on the steering wheel 2 is provided at the lower end of the rotary member. A circular terminal 14 electrically connected to the battery side is disposed under the contact 8, so it is pressed to the contact 8 by a resilient member 17 integrally moulded with the switch assembly 15. Electric continuity is thus secured in spite of rotation of the steering wheel, and the size can be made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vehicular knob switch for automobiles and the like.

2. Description of the Related Art In general, power supply to a handlebar switch is configured as shown in FIGS. 2 to 4, taking an alarm device as an example.

That is, the alarm switch 12 having the operating piece 3 is provided on the hand lv2 fixed to the tip of the handle shaft 1, and the ground side is electrically connected to the handle shaft 1.

The lower part of the cylindrical column 26 holding the central cancel cam 20 of the switch assembly 6 provided around the lower handle shaft 1 is provided with conductive material in the form of a ring. The terminal 26 is inserted and held, and the lead wire 11 on the battery side is electrically connected to the L-shaped portion 27 of the terminal 26 protruding from the bottom surface of the main body 6. Further, above the ring-shaped terminal 26, a cancel cam 20 is always mounted with a hand, /
A conductive coil μ spring (conductive member) 28 is provided which biases toward L/2. A coil spring tip 30ij on the cancel cam 20 side of the coil p-spring 28 has a straight and vertically extended shape, and this straight portion is inserted into a through hole 32 provided in a cancel pin part 31 of the cancel cam 2o. The handle 2 is provided with a notch opening 34 to facilitate electrical connection between the straight end 30 of the coil spring 28 protruding from the cancel cam 20 and the lead wire 33 from the alarm switch 12. Lead wire 3 at opening 34
3 and the straight end 30 of the coil spring 28 are electrically connected.

The hand/L/2 cancel cam 20 has two to three handle connecting pins 36 protruding from the cancel cam 20.
is fitted into the fitting recess 36 of the handle 2 portion, and is constantly biased toward the hand/L/2 side by the coil spring 28, so that it rotates integrally with the hand l'v2. When the operating piece 3 of the alarm switch 12 placed on the hand A/2 is pressed, the alarm switch 12 closes and the current from the battery 9 flows to the alarm 10. Lead wire 11.
Terminal 26° coil spring 28. Lead string 33. The water flows to the handle shaft 1 via the alarm pipe 12, and the alarm 10 is activated. Note that the column cover 44 13 is a lever for a direction indicator.

Problems to be Solved by the Invention In the above configuration, a conductive coil spring 28 is used to ensure electrical connection between the lead wire 11 and the terminal 26 even when the hand/L/2711 rotates. ing.

Since this coil spring 28 requires a certain length and hanging height in order to obtain a predetermined spring property, there is a problem that the dimension between the cancel cam 20 and the terminal 26 becomes large. there were.

Therefore, the present invention aims to reduce this dimension.

Means for Solving the Problems In order to achieve this object, the present invention provides a switch assembly equipped with a direction indicator etc. around the handle shaft on the lower surface of the handle, and also provides a switch assembly in the internal space of the switch assembly. is provided with a rotating member that rotates integrally with the steering wheel and has a cancel cam that automatically returns the lever to the neutral position when the turn signal lever is operated, and the lower end of this rotating member is attached to the handle. A contact point electrically connected to the alarm switch provided on the switch assembly is provided, and a ring-shaped terminal electrically connected to the battery side is arranged below this contact point, and this terminal is integrally molded with the switch assembly. The elastic piece is pressed against the contact side.

If the configuration is more efficient than the above, it would be provided at the lower end of the rotating member without using a conductive coil spring, and the contact point electrically connected to the alarm switch provided on the handle would be electrically connected to the battery side. The ring-shaped terminal can be pressed by an elastic piece integrally molded into the switch assembly.
Electrical continuity is ensured even when the handle is rotated, and the size can also be reduced.

Example An embodiment of the present invention will be described below with reference to FIG.

Note that the same parts as in FIGS. 2 to 5 are given the same numbers to simplify the explanation.

In FIG. 1, reference numeral 4 denotes a conductive pin electrically connected to a lead wire 33, and this pin 4 passes through the cancel cam 20.

A ring-shaped terminal 7 is fixed to the lower end of the canceled cancel cam 20, and a hemispherical contact 8 is integrated into this terminal 7.

Further, 14 is a ring-shaped terminal, and this terminal 14 is provided in a recess 16 at the bottom of the switch assembly 16.

An elastic piece 17 integrated with the switch assembly 15 is provided in the recess 16, and the terminal 14 is fixed to the upper surface of the elastic piece 1T.

In the above configuration, the hand/L/2 alarm switch 12
When the alarm 10 is closed, the current from the battery 9 is applied to the alarm 10.
Lead #J11. Terminal 14. Contact point 8. Pin 4. It flows to the handle shaft 1 via the lead wire 33, thereby causing an alarm to be issued.

Effects of the Invention As described above, according to the present invention, a conductive coil spring is not used, and the contact is provided at the lower end of the rotating member, and is connected to the battery side with respect to the contact electrically connected to the alarm switch provided on the handle. Since the electrically connected annular terminal can be pressed by an elastic piece integrally formed with the switch assembly, electrical continuity is ensured even when the handle is rotated, and the size can be reduced.

Furthermore, since the elastic piece is integrally molded with the switch assembly, the number of separate parts can be reduced, since the coil spring is not required.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing one embodiment of the vehicle handle switch of the present invention, Fig. 2 is a cross-sectional view of a switch assembly of a conventional example, Fig. 3 is a plan view of its main part, and Fig. 4 is its The sectional view and FIG. 6 are exploded perspective views thereof. 1...Handle shaft, 2...Handle, 3...Operation piece, 8...Contact, 9
...Battery 10 ...Alarm, 12
...Alarm switch, 14...Terminal, 15...Switch assembly, single piece, 20...
...Cancel cam.

Claims (1)

[Claims] A switch assembly equipped with a direction indicator, etc. is provided around the handle shaft on the underside of the handle, and an internal space of the switch assembly is provided with a switch assembly that rotates integrally with the steering wheel and has a switch assembly that rotates integrally with the steering wheel when the direction indicator lever is operated. A rotating member is provided with a cancel cam that automatically returns the lever to the neutral position by rotation of the handle, and a contact point electrically connected to an alarm switch provided on the handle is provided at the lower end of the rotating member. An annular terminal electrically connected to the battery is disposed below the contact, and this terminal is pressed toward the contact by an elastic piece integrally formed with the switch assembly.