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Optical switch structured of a barcode scanner

  • US 20060255151A1
  • Filed: 03/10/2003
  • Published: 11/16/2006
  • Est. Priority Date: 03/10/2003
  • Status: Abandoned Application
First Claim
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1. An optical switch structure of a barcode scanner having a casing, comprising:

  • a wheel center fixedly mounted on an axle and partially protruding out of the scanner casing as a rotated switch;

    a light shield provided on said wheel;

    said light shield having a plurality of radial slots; and

    a U-shaped photo interrupter having two upwardly extending arms with photodiode light emitter and phototransistor light receiver inside disposed on either arm, said U-shaped photo interrupter being installed under said light shield so that said photodiode light emitter is disposed at one side of said light shield and said phototransistor light receiver is disposed at the opposite side of said light shield;

    whereby when said wheel is rotated, said light shield will be rotated simultaneously thereby intermittently blocking light transmitting from said photodiode light emitter to said phototransistor light receiver and therefore converting light signals into pulse signals to turn on said barcode scanner.

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