JPS6266513A - Push button switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Industrial use! P1 This invention relates to a push button switch using a thin sheet switch. BACKGROUND OF THE INVENTION Seat switches such as the one described above have been known, and there have also been push-button switches using such seat switches. This push button will be explained with reference to FIG. In FIG. 3, 1 is a push button with seven flange 1a protruding from the lower part of the outer periphery and a flat bottom surface, and 2 is a thin sheet switch placed below the push button 1. A fixed contact pattern 3a is formed on the upper surface, a flexible substrate 5 is disposed on the substrate 3 via an insulating spacer 4, and a movable contact pattern 5a is formed on the lower surface of the flexible substrate 5. Both contact patterns 3a and 5a are arranged so as to face each other at a hole 4a formed in the center of the spacer 4. 6 is a housing fixed on the outer circumference of the substrate 3 via the sheet switch 2, and an annular protrusion 6a protruding toward the center is formed at the upper end of the housing 6. Reference numeral 7 is a cushioning material made of an integrally molded product of an elastic material such as silicone rubber or foamed urethane.
7- An annular groove 7b is formed on the lower surface, a pressing portion 7C is provided on the center side of the annular groove 7b, and a support portion 7d is provided on the outer periphery of the annular groove 7b. Support part 7d, spacer 4
The pressing portion 7C is disposed on the outer peripheral side of the hole 4a and supported on the flexible substrate 5, and the lower surface of the pressing portion 7C is disposed on the flexible substrate 5 with a small gap therebetween. A coil spring 8 is interposed between the lower surface of the flange 1a of the push button 1 and the upper surface of the flexible substrate 5, and the coil spring 8 is fitted into a spring guide 9 provided on the lower surface of the flange 1a of the push button 1. In the conventional push-button switch configured as described above, when the switch is not in operation, the flange 1a of the push-button 1 is pushed into the annular protrusion 6a of the housing 6 by the spring 8, as shown in FIG.
It is supported on the lower surface, and a slight gap is formed between the lower surface of the push button 1 and the projection of the mli material 7. In this state, when the push button 1 is pushed down against the spring force of the spring 8, the lower surface of the push button 1 comes into contact with the protrusion 7a, and the cushioning material 7 is elastically deformed.
The flexible substrate 5 is elastically deformed by the pressing portion 7c, the movable contact pattern 5a closes with the fixed contact pattern 3a provided on the substrate 3, and the sheet switch 2 is turned ON. In this state, when the pressing force of the push button 1 is released, the push button 1 returns to the upward position due to the elastic restoring force of the spring 8, and the cushioning material 7 and the flexible substrate 5 also return to their elastic state, and the contact patterns 5a and 3A is released, returning to the non-operating state shown in FIG.

[Problems to be solved by the invention]

The push button 1 as described above, the seat switch 2, and the cushioning material 7 made of an elastic material provided in the housing 6 and arranged between the push buttons 1 are provided, and when the push button 1 is pressed, the seat is In a push button switch that operates the switch 2, if the push button 1 becomes heavy due to the material, shape, etc. of the push button 1, vibrations applied from the outside may cause the push button 1 to become heavy.
Seat switch 2 contact is ON even if push button 1 is not pressed
There is a problem with this. Therefore, conventionally, a coil spring 8 is interposed between the push button 1 and the outer periphery of the seat switch 2, such as the one shown in FIG. There are problems in that the number is large, and the structure is complicated and expensive. The object of the present invention is to solve the above-mentioned problems and obtain a push button switch that has a small number of parts, a simple structure, and is inexpensive.

[Means to solve the problem]

This invention provides a push button switch in which a seat switch is actuated via a cushioning material by pressing the push button as described above. It has a protruding part.

[For use]

In the push button switch of this invention, the push button is pushed up to the side opposite to the contact point of the seat switch by the push-up part provided on the outer periphery of the 111m material placed between the push button and the seat switch, so the coil spring , it is possible to eliminate the above-mentioned spring holding member such as a spring guide, and the number of parts can be reduced and the structure can be simplified.

【Example】

Hereinafter, this invention will be explained as follows. In FIGS. 1 and 2, the same reference numerals as in FIG. 3 indicate corresponding parts, and the outer circumference of the upper part of the cushioning material 7 is made to protrude in the radial direction, and a push-up part 7f is placed on the protrusion 7e on the protrusion 7c.
The push button 1 is made to protrude higher, and the flange portion 1a of the push button 1 is pressed against the annular protrusion portion 6a of the housing 6 by the push-up portion 7f. In this embodiment, a coil spring and a spring guide are not provided. The configuration of this embodiment other than the above is the same as the conventional one shown in FIG. In the push button switch of the embodiment configured as described above, when the push button switch is not in operation, as shown in FIG. is compressed and supported by the annular protrusion 6a,
Since a gap is formed between the lower surface of the push button 1 and the projection 7a at the center of the upper surface of the H1j material 7, the seat switch 2 will not be turned on even if vibration is applied to the push button switch from the outside. In this state, when the push button 1 is pressed down, the push-up portion 7f is elastically deformed to expand outward as shown in FIG. 2, and the lower surface of the push button 1 comes into contact with the protrusion 7a.
The cushioning material 7 is elastically deformed, and both contact patterns 5a and 3a of the sheet switch 2 are closed by the suppressing portion 7C of the cushioning material 7, and the sheet switch 2 is turned on. In this state, when the pressing force of the push button 1 is released, the cushioning material 7 and the flexible substrate 5 return to the non-operating state shown in FIG. 1 by their elastic restoring forces. As can be seen from the above description, in the push button switch of this embodiment, the push-up portion 7f of the buffer material 7 functions as a conventional coil spring. In the present invention, the push-up portion 7E of the cushioning material 7 may be provided over the entire outer periphery of the cushioning material 7 as in the above embodiment, but may also be provided only on a portion thereof.

【Effect of the invention】

As explained above, according to the present invention, a push-up portion is made to protrude above the outer periphery of the cushioning material disposed between the push button and the seat switch, and this push-up portion has the function of a conventional coil spring. Since the push button is pushed up to the side opposite to the contact point of the seat switch, the number of parts can be reduced, the structure can be simplified, and an inexpensive push button switch can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a push button switch according to an embodiment of the present invention in a non-operating state, FIG. 2 is a sectional view of the push button switch in an operating state, and FIG.
The figure is a sectional view of a conventional push button switch in a non-operating state. 1...Push button, 1a□-flange, 2...Seat switch, 3a, 5a...Fixed side, movable side contact pattern,
4... Spacer, 6... Housing, 7... Buffer material, 7a... Projection, 7b... Annular groove, 7C...
Pressing part, 7d... Supporting part, 7f... Pushing up part. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa (and 2 others) Procedural amendment (
(Voluntary) Showa, Month, Day 3, Relationship with the case of the person making the amendment Moriya Shiki, representative of the patent applicant 4, Agent 5, Subject of amendment (1) Drawing 6, Contents of amendment (1) Drawing 2 Correct as shown in the attached sheet. 7. Attached documents

Claims (1)

[Claims] A push button, a seat switch, and a cushioning material made of an elastic material disposed between the push button and the seat switch provided in a housing, and the seat switch is activated through the cushioning material by pressing the push button. In the push-button switch that is operated, a push-up part that projects higher than the protrusion that projects above the center of the upper surface of the cushioning material is made to protrude from at least a part of the outer periphery of the cushioning material, and the push-button switch is pushed by the push-up part. A push button switch characterized in that the outer circumference of the button is pressed and supported by the housing.