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Expandable and compressible keyboard

  • US 5,951,178 A
  • Filed: 08/03/1998
  • Issued: 09/14/1999
  • Est. Priority Date: 12/29/1997
  • Status: Expired due to Fees
First Claim
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1. A keyboard comprising:

  • a lower frame having an elastic member installed on the surface thereof;

    an elevation plate installed on said lower frame capable of ascending or descending by an elastic force of said elastic member;

    a pair of guide plates separately installed above said elevation plate capable of moving toward or away from each other in a horizontal direction and, said guide plates having a plurality of key holes and guides;

    switch units each having switches and respectively installed on said lower frame, above said elevation plate and on a bottom surface of said guide plates; and

    a linkage of key pad assemblies each installed to be capable of compressing or extending by being guided by said guides of said guide plates and having a key for operating a switch of said switch units directly or by inserting in said key holes of said guide plates.

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