Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent
1998-01-06
1999-04-27
Walczak, David J.
Electricity: circuit makers and breakers
Electric switch details
Actuators
200341, H01H 1370
Patent
active
058981454
ABSTRACT:
A computer key includes a base plate, a membrane circuit, a foil sheet, a biasing member, a push button, and first and second linking frames. The base plate includes a first hingeably retaining member and a first slidably retaining guideway spaced from each other in a longitudinal direction and formed with first and second retaining portions for blocking movement in an upward and normal direction. The membrane circuit is disposed on the base plate, and has left and right openings for extension of the first and second retaining portions therethrough. The foil sheet is superimposed on the membrane circuit to sandwich a lower flange on the biasing member therebetween. The first and second linking frames have first and second linking arms connected pivotally at intermediate portions to permit extension of the biasing member such that the latter is disposed between the push button and the base plate. The first linking arms have a lower portion with front and rear hooking ends, wherein the front hooking end can be inserted from a parallel direction relative to a plane of the base plate for retaining the front and rear hooking ends in the first hingeably retaining member of the base plate to block movement in the upward and normal direction.
REFERENCES:
patent: 5630501 (1997-05-01), Tsay
patent: 5657860 (1997-08-01), Koike et al.
patent: 5695047 (1997-12-01), Tanahashi
patent: 5746308 (1998-05-01), Lin
patent: 5770824 (1998-06-01), Tsai et al.
Shin Jiuh Corp.
Walczak David J.
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