JPS5829870Y2 - push button switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a push button switch that uses a reversible diaphragm and operates with a small stroke.

Pushbutton switches that operate with a small stroke have conventionally been available, but this required separate indirect pressing members such as springs to protect the contacts from abnormal loads.9 For example, the number of parts increased, or the assembly process There were some problems, such as the indirect pressing member being lost.

Furthermore, the number of assembly steps increased.

The present invention solves the above-mentioned conventional drawbacks and provides a switch that operates with a small stroke and has an extremely simple configuration.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1a, 1a, and 2.

1 is a switch board to which fixed contacts 2 a and 2 b are fixed.

3 is a reversible diaphragm, and the surrounding part is a fixed contact 2.
It is placed on the upper part of the switch board 1 so as to be in contact with the fixed contact 2b and to have its center part facing the fixed contact 2b with a slight distance therebetween.

4 is a switch case, and the switch board 1 is shown below.
, and a push button 5 is movably inserted.

The push button 5 has an operating protrusion 6 which is elastically molded downward and presses against the reversible diaphragm 3.

Further, the push button 5 is equipped with a semi-transparent plate 7 on its upper surface, and the switch case 4 is equipped with an illumination lamp 8 to be located inside the push button 5.

As shown in FIG. 2, the operating protrusion 6 of the push button 5 is formed to protrude from the center of the lower surface of the push button 5, which is elastically formed into a mesh shape.

Next, the effect will be explained.

FIG. 1a shows the switch OFF state, and the center part of the reversible diaphragm 3 is bent upward, and the fixed contact 2b
is estranged from.

Therefore, the fixed contact 2a and the fixed contact 2b are in a non-conducting state, and the electric circuit (not shown) in which the fixed contacts 2a and 2b are interposed and connected is opened.

FIG. 1 shows the switch ON state.

That is, when the upper surface of the push button 5 is operated in the direction of the arrow A, the push button 5 moves downward, and the operating protrusion 6 presses the reversible diaphragm 3, causing the center of the diaphragm 3 to curve downward. Transform.

The center portion of the diaphragm 3 is pressed against the fixed contact 2b.

Therefore, the fixed contacts 2a and 2b are brought into conduction, and the electric circuit in which the fixed contacts 2a and 2b are interposed and connected is closed.

At this time, the operating protrusion 6 is pushed back in the direction of arrow B and is slightly displaced upward.

Therefore, the central portion of the diaphragm 3 comes into pressure contact with the fixed contact 2b with sufficient contact pressure.

Next, when the push button 5 is released from the push button 5 in the direction of the arrow A, the center portion of the reversible diaphragm 3 bends upward due to its own elastic restoring force and returns to the state shown in FIG. 1A.

At this time, the diaphragm 3 presses the push button 5 via the operating protrusion 6.
Push it upwards to return it.

Therefore, the switch automatically returns to the state shown in FIG. 1a again, and becomes the switch OFF state.

The illumination lamp 8 emits light when energized, and illuminates the semi-transparent plate 7 on the upper surface of the push button 5.

The present invention has the above-mentioned configuration and operation, and has the following effects.

That is, since a reversible diaphragm is used as the movable contact plate, it is possible to easily provide a push button switch in which switching of switch contacts is extremely quick and the operation stroke is short.

In addition, the operation protrusion for reversing the reversible diaphragm is integrally molded by protruding from the bottom surface of the push button, which has an elastic mesh-like bottom, so that another indirect pressing member such as a spring can be used. It has the effect that the reversible diaphragm and the fixed contact can be brought into pressure contact with each other with sufficient contact pressure with a simple structure that does not require the above.

[Brief explanation of drawings]

FIG. 1a shows the OF of a push button switch showing an embodiment of the present invention.
FIG. 1 is a sectional view of the push button switch shown in FIG. 1a in the ON state, and FIG. 2 is a perspective view of the push button shown in FIG. 1a. 1...Switch board, 2a, 2b...
Fixed contact, 3... Reversible diaphragm, 4.
...Switch case, 5...Push button, 6.
...! Operation lever.

Claims (1)

[Scope of utility model registration request] A switch board to which a fixed contact is fixed, a reversible diaphragm placed on the switch board to constitute a movable contact corresponding to the fixed contact, and the reversible diaphragm attached to a lower surface portion formed into an elastic mesh shape. A push button switch comprising a push button having a protruding operation protrusion for reversing the action.