Linear oscillator and electrically driven toothbrush

Details Linear oscillator and electrically driven toothbrush Linear oscillator and electrically driven toothbrush

2002-03-27

2008-01-01

Guidotti, Laura (Department: 1744)

Electrical generator or motor structure

Dynamoelectric

Reciprocating

C310S020000, C015S022100, C015S022200, C015S026000

Reexamination Certificate

active

07315098

ABSTRACT:
A linear oscillator and an electric toothbrush capable of emitting a low noise and of being assembled compact are provided. The linear oscillator, which reciprocates a shaft in an axial direction thereof, includes a plunger movable together with the shaft in the axial direction of the shaft, an elastic member for applying an axially acting resilient force to the plunger, an electromagnetic driving unit operable to reciprocate the plunger in the axial direction of the shaft at a resonant frequency when an alternating current is supplied thereto, and a fixing member restricting rotation of the plunger about an axis thereof within a predetermined angle. The electric toothbrush includes the linear oscillator and a brush head attached to the shaft for use in brushing teeth.

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Computer generated English translation of JP 9-252843, Sep. 1997.
English translation of Abstract of JP 9-252843, Sep. 1997 (also Derwent-Acc-No 1997-530208).
English translation of JP 9-252-843, Dec. 1999.
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