Computer key switch device

Details Computer key switch device Computer key switch device

1993-10-27

1995-02-14

Cusick, Ernest G.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200517, 200 5A, 200345, H01H 312

Patent

active

053897552

ABSTRACT:
A computer a key switch device comprised of key cap, a key body plate and a rubber base plate, wherein the key body plate has a raised key body portion with a respective center hole and a pair of opposite pin holes and a pair of opposite retaining holes; the rubber base plate has a conical projection received within the raised key body portion, the conical projection having a horn-shaped bottom ring supported on a membrane, a top ring extended out of the center hole on the raised key body portion, a transverse division wall blocked between the top ring and the horn-shaped bottom ring, and a solid stub rod extended downwards from the transverse division wall at the center to trigger a circuit inside the membrane upon each down stroke of the key cap; the key cap has a plunger stopped against the top ring of the conical projection, two opposite bottom rods inserted into the pin holes on the raised key body portion, and two opposite hooks hooked in the retaining holes on the raised key body portion.

REFERENCES:
patent: 2856998 (1974-12-01), Sims
patent: 4492838 (1985-01-01), Fukukura
patent: 4527030 (1985-07-01), Oelsch
patent: 4641004 (1987-02-01), Keprda
patent: 4927990 (1990-05-01), Aoki et al.
patent: 5203448 (1993-04-01), Osada et al.

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