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Vibration generating device and oral hygiene device using same

  • US 6,140,723 A
  • Filed: 09/17/1998
  • Issued: 10/31/2000
  • Est. Priority Date: 03/21/1996
  • Status: Expired due to Fees
First Claim
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1. An oral hygiene device comprising:

  • an electric motor installed in a casing and a rotating body mounted on a rotary shaft of the electric motor,a driving magnetic body made of permanent magnet provided in the rotating body,an output member passing through the casing in fluid-tight condition,a resonance pin resiliently supporting a middle portion of the output member to the casing so as to be swingable finely,a driven magnetic body made of permanent magnet provided in the output member to face said driving magnetic body so as not to contact therewith inside the casing, andan oral hygiene tool being removably attached directly or indirectly to the output member outside the casing,wherein the oral hygiene tool through the output member is vibrated by a varying magnetic field generated between both magnetic bodies with a rotation of the rotating body.

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