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Trackball device

  • US 20060208840A1
  • Filed: 03/15/2006
  • Published: 09/21/2006
  • Est. Priority Date: 03/17/2005
  • Status: Active Grant
First Claim
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1. A trackball device comprising:

  • an operating ball;

    a plurality of rollers which rotate by contacting the ball while the ball is rotated;

    a multipole permanent magnet which co-rotates with each of the rollers;

    a reed switch disposed in a position where it turns on and off as a result of changes in magnetic flux caused by rotation of the permanent magnet so as to provide tactile feedback while the ball is rotated.

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