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TWO-STAGE SWITCH ASSEMBLY

  • US 20100084252A1
  • Filed: 02/26/2009
  • Published: 04/08/2010
  • Est. Priority Date: 10/08/2008
  • Status: Active Grant
First Claim
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1. A switch assembly comprising:

  • a lower surface;

    a push key supported above said lower surface and moveable with respect thereto, said push key comprising an elongate member having a first end portion and a second end portion;

    a first switch comprising a first upper contact supported above a first lower contact, said lower contact being supported by said lower surface, both being aligned with said end portion, and a resilient member interposed between said first upper contact and said first lower contact; and

    a second switch comprising a collapsible dome supported by said lower surface and being aligned with said second end portion, said dome comprising a second upper contact and a second lower contact;

    wherein upon movement of said push key, said resilient member deforms to close said first switch under a first force, while a second force greater than said first force is required to collapse said dome.

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