Push button key switch

Details Push button key switch Push button key switch

1992-02-11

1993-04-20

Cusick, Ernest G.

Electricity: circuit makers and breakers

Solid contact

Membrane type

200341, 200 5A, 200342, 200345, H01H 312

Patent

active

052034488

ABSTRACT:
A push button key switch has an intermediate guide cylinder which is free to slide lengthwise inside a fixed guide cylinder and which at the same time holds the neck of a keytop while allowing it to slide freely lengthwise. The intermediate guide cylinder guides the keytop in its motion while the fixed guide cylinder guides the intermediate guide cylinder in its motion. Downward motion of the keytop causes the lower ends of the neck and the intermediate guide cylinder to collapse an elastic member which, in turn, then activates an electrical contact mechanism.

REFERENCES:
patent: 4454562 (1984-06-01), Bush
patent: 4527030 (1985-07-01), Oelsch
patent: 4720609 (1988-01-01), Hochgesang et al.
patent: 4755645 (1988-07-01), Naoki et al.
patent: 4918271 (1990-04-01), Deeg
patent: 4927990 (1990-05-01), Aoki et al.

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