Key structure

Details Key structure Key structure

2007-09-21

2009-06-02

Friedhofer, Michael A (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Membrane type

C200S344000, C200S345000

Reexamination Certificate

active

07541554

ABSTRACT:
A key structure comprises a membrane circuit, a substrate, a cover and a press element. The membrane circuit comprises at least one first signal generator and a second signal generator. The substrate is disposed below the membrane circuit to support the membrane circuit. The cover comprises a body and at least one protrusion, wherein the protrusion is disposed on the body corresponding to the first signal generator. The press element is disposed on the second signal generator, wherein when force is applied on the cover, the protrusion presses the first signal generator.

REFERENCES:
patent: 6246019 (2001-06-01), Nakamura et al.
patent: 6567074 (2003-05-01), Numata et al.
patent: 6586689 (2003-07-01), Kuriyama
patent: 6750406 (2004-06-01), Komatsu et al.
patent: 6914202 (2005-07-01), Sugimoto et al.
patent: 7288732 (2007-10-01), Hashida
patent: 7312410 (2007-12-01), Griffin et al.

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