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Release switch apparatus

  • US 5,072,248 A
  • Filed: 12/03/1990
  • Issued: 12/10/1991
  • Est. Priority Date: 12/01/1989
  • Status: Expired
First Claim
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1. A release switch apparatus having a release button which is supported in a camera body so as to move in a predetermined direction between an initial position and a specific operational position in which said release button is pushed down, comprising:

  • a light emitter provided in one of said release button or said camera body;

    emission control means for causing said light emitter to emit light when said release button is moved from said initial position;

    a light receiver which is provided in the other one of said camera body or said release button to receive light emitted from said light emitter; and

    ,control means which operates in response to the output of said light receiver.

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