Key switch for a keyboard

Details Key switch for a keyboard Key switch for a keyboard

1997-03-05

1998-02-17

Walczak, David J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200345, 200512, H01H 1370

Patent

active

057183279

ABSTRACT:
A key switch including a key base having a circular upright bearing defining a first axial hole and a second axial hole around the first axial hole, a key cap having a first downward tube inserted into the first axial hole of the base and a second downward tube inserted into the second axial hole of the key base, a membrane circuit mounted on the flat base of the key base around the upright bearing, and a rubber mounted on the membrane circuit around the upright bearing of the key base to support the key cap above the key base and having a plunger portion spaced around the upright bearing of the key base and forced by the key cap to trigger the membrane circuit when the key cap is depressed, causing it to produce an electric signal.

REFERENCES:
patent: 5115106 (1992-05-01), Weiland et al.
patent: 5386091 (1995-01-01), Clancy
patent: 5396038 (1995-03-01), Yamada

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