ELECTRIC TOOTHBRUSH
First Claim
1. An electric toothbrush, comprising:
- a motor;
an eccentric shaft with one end fixed to a rotation shaft of the motor; and
a vibration transmitting component for transmitting vibration generated in accordance with rotation of the eccentric shaft to a brush portion, whereinthe eccentric shaft is formed so that a gravity center position is movable at least in one direction among a direction in which a distance to a shaft center is changed and an axial direction.
1 Assignment
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Accused Products
Abstract
The invention provides an electric toothbrush capable of changing a resonant frequency and vibration amplitude of an eccentric shaft. An electric toothbrush of the present invention includes a motor, an eccentric shaft with one end fixed to a rotation shaft of the motor, and a stem serving as a vibration transmitting component having a bearing for supporting the other end of the eccentric shaft for transmitting vibration generated in accordance with rotation of the eccentric shaft to a brush portion. In the electric toothbrush, eccentric shaft is formed so that a gravity center position is movable at least in one direction among a direction in which a distance to a shaft center is changed and an axial direction.
40 Citations
10 Claims
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1. An electric toothbrush, comprising:
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a motor; an eccentric shaft with one end fixed to a rotation shaft of the motor; and a vibration transmitting component for transmitting vibration generated in accordance with rotation of the eccentric shaft to a brush portion, wherein the eccentric shaft is formed so that a gravity center position is movable at least in one direction among a direction in which a distance to a shaft center is changed and an axial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification