Pushbutton structure of computer keyboard

Details Pushbutton structure of computer keyboard Pushbutton structure of computer keyboard

1999-07-15

2000-06-27

Friedhofer, Michael

Electricity: circuit makers and breakers

Electric switch details

Actuators

H01N 1370

Patent

active

060809485

ABSTRACT:
A computer keyboard pushbutton structure includes a base plate on which a pair of pivotally attached link members forming a collapsible cross configuration is supported. A key cap is supported on the link members and movable with the collapse of the cross configuration of the link members. A membrane circuit is positioned on and supported by the base plate. The membrane circuit includes an insulative film on which a contact switch and corresponding conductive traces are formed. The insulative film defines openings through which the link members extend to contact and thus be directly supported by the base plate. A rubber cap is supported on the membrane circuit and coupled to the key cap for being deformable by depression of the key cap whereby a projection of the rubber cap contacts and thus actuates the contact switch.

REFERENCES:
patent: 5278371 (1994-01-01), Watanabe et al.
patent: 5504283 (1996-04-01), Kako et al.
patent: 5850194 (1998-12-01), Lin
patent: 5878872 (1999-03-01), Tsai
patent: 5894117 (1999-04-01), Kamishima
patent: 5898145 (1999-04-01), Su
patent: 5924553 (1999-07-01), Yeh

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