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Electric toothbrush with linear oscillator

  • US 7,328,474 B2
  • Filed: 01/13/2003
  • Issued: 02/12/2008
  • Est. Priority Date: 01/18/2002
  • Status: Expired due to Fees
First Claim
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1. An electric toothbrush comprising;

  • a drive part comprising;

    a drive shaft provided to be lineally movable; and

    a brush part detachably attached to one end of the drive shaft;

    a driver configured to apply reciprocal force to the drive shaft to reciprocally lineally move the drive shaft;

    a vibration-absorber connected to the drive shaft via a spring to be lineally movable along the drive shaft; and

    an outer case housing the drive shaft, the driver, and the vibration-absorber,wherein the vibration-absorber is provided within an open area that extends from the drive shaft to an inner surface of the outer case.

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