Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 12, 2008
Patent Application Number
10340632
Date Filed
January 13, 2003
Patent Primary Examiner
Patent abstract
An electric toothbrush includes a drive part, a driver, a brush part and a vibration-absorber. The drive part includes a drive shaft provided to be lineally movable and a brush part detachably attached to one end of the drive shaft. The driver is configured to apply reciprocal force to the drive shaft to reciprocally lineally move the drive shaft. The vibration-absorber is connected to the drive shaft via a second spring to be lineally movable along the drive shaft. A weight ratio of a weight of the vibration-absorber to a weight of the drive part is at least 0.9 and at most 1.1.
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