Push button switch

Details Push button switch Push button switch

1999-02-05

2000-01-04

Gellner, Michael L.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200344, 2004911, 2004912, H01H 1370

Patent

active

060112271

ABSTRACT:
A push button switch for use in computer keyboards, comprising a membrane sheet 92 whose upper surface forms the switch base plate 90 upon which is mounted a rubber spring 93 which operates the switch, and upon which is arranged a plate-shaped holder member 40 containing a through hole 41, through which the rubber spring 93 projects. Between key top 1, positioned on top of holder member 40, and holder member 40 is arranged moving frame 60 and moving arm 80, assembled in a pantograph assembly. This assembly supports key top 1 so that it can move up and down in relation to membrane sheet 92, and rubber spring 93 biases key top 1 upwards. When key top 1 is pressed downwards, the pressure is transmitted via rubber spring 93 to cause the switch of membrane sheet 92 to operate. When the pressure is released, the resilience of rubber spring 93 raises key top 1 back to its original position.

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