Electricity: circuit makers and breakers – Solid contact – Membrane type
Reexamination Certificate
2006-07-11
2006-07-11
Friedhofer, Michael A. (Department: 2832)
Electricity: circuit makers and breakers
Solid contact
Membrane type
C200S516000, C200S517000, C200S00600C
Reexamination Certificate
active
07075025
ABSTRACT:
A switch sheet and switch utilizing the switch sheet are provided, wherein the switch sheet utilizes a dome shaped spring, and is structured such that the dome shaped spring can be definitively clicked in the center part and operate effectively even when the dome shaped spring is miniaturized. In addition to having long-lasting, superior durability, this switch sheet provides an improved click ratio enabling miniature devices with a good clicking sensation to be achieved. This switch sheet comprises a dome shaped spring, resin sheeting adhered to the external surface of this dome shaped spring via an adhesive agent, and a rigid member positioned on the outside of this resin sheeting, having a downward facing protrusion part formed to oppose the center part of said dome shaped spring.
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Ajimura Shoji
Tomitsuka Toshimizu
Friedhofer Michael A.
Fujikura Ltd.
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