Keyboard apparatus

Details Keyboard apparatus Keyboard apparatus

1994-06-27

1996-05-14

Walczak, David J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200512, 400490, H01H 1370

Patent

active

055169961

ABSTRACT:
A keyboard apparatus according to this invention has a key button being formed with a key stem in a body to directly assemble with a key holder and separate from it. The key apparatus has a movable contact and a fixed contact of membrane structure, and has a key switch above the contact portion. The key switch comprises a rubber spring being formed above the contact position, a key holder to receive and guide a key button from upper side, and key button.

REFERENCES:
patent: 4677600 (1987-06-01), Yoshida
patent: 5172990 (1992-12-01), Weng
patent: 5173578 (1992-12-01), Tama
patent: 5324902 (1994-06-01), Shen
patent: 5386091 (1995-01-01), Clancy

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