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Keyboard apparatus

  • US 4,786,766 A
  • Filed: 01/15/1988
  • Issued: 11/22/1988
  • Est. Priority Date: 08/26/1985
  • Status: Expired due to Term
First Claim
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1. A keyboard apparatus comprising:

  • panel means having a single first opening portion and four second opening portions;

    input means adjacent a first side of said panel means comprising a pair of conductive members separated by an elastic force and adapted to contact each other due to a pressing force; and

    a key button substantially in the shape of a quadrangle arranged adjacent a second side of said panel means, said button comprising a first projecting portion which projects from substantially the center of said key button and four second projecting portions each having an engaging member and each projecting from near one of four corners of said key button, wherein said first projecting portion is inserted through said first opening portion and thereby guided in a predetermined direction by said first opening portion to said first side of said panel means, the end portion of said first projecting portion contacting said input means so as to be biased away from said panel means by the elastic power of said input means, and wherein each of said four second projecting portions is inserted through different ones of said second opening portions to said first side of said panel means, each engaging member of said second projecting portions engaging near to said different one of said second opening portions so as to provide a force against the elastic power of said input means.

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