Membrane switch

Details Membrane switch Membrane switch

2008-03-25

2008-03-25

Enad, Elvin (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Membrane type

Reexamination Certificate

active

11474400

ABSTRACT:
A membrane switch solves the problem of requiring a spacing layer or spacers as in the prior art, and includes an upper membrane, a lower membrane. The upper membrane has an upper elastic tongue, an upper hollow portion formed around the upper elastic tongue, and a first conductive trace printed on a top surface of the upper membrane with a first contact formed on the upper elastic tongue. The lower membrane has a lower elastic tongue corresponding to the upper elastic tongue, a lower hollow portion formed around the lower elastic tongue, and a second conductive trace printed on a bottom surface of the lower membrane with a second contact on the lower elastic tongue. The lower elastic tongue penetrates through the upper hollow portion of the upper membrane and elastically extends above the upper elastic tongue. When the lower membrane is depressed, the second contact contacts the first contact.

REFERENCES:
patent: 4496812 (1985-01-01), Carley et al.
patent: 6441330 (2002-08-01), Liao
patent: 6600121 (2003-07-01), Olodort et al.
patent: 7112755 (2006-09-01), Kitano et al.
patent: 2002/0179423 (2002-12-01), Nozawa et al.

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