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Linear oscillator and electrical driven toothbrush

A linear oscillating, electric toothbrush technology, used in AC motor control, dentistry, electrical components, etc., can solve the problems of bad driving characteristics, high noise, and difficulty in miniaturization.

Inactive Publication Date: 2004-06-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using such a moving direction changing mechanism not only has problems such as low energy efficiency and high noise caused by the mechanical loss generated by the moving direction changing mechanism, but also it is difficult to realize miniaturization.
Moreover, in electric toothbrushes, since the direction of movement of the motor shaft and the direction of movement of the brush part (action point) are different, a bending moment occurs during operation, which adversely affects the driving characteristics.

Method used

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  • Linear oscillator and electrical driven toothbrush
  • Linear oscillator and electrical driven toothbrush
  • Linear oscillator and electrical driven toothbrush

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Embodiment Construction

[0028] Embodiments of the present invention will be described below with reference to the drawings. In the drawings, constituent elements marked with the same symbol have the same function.

[0029] figure 1 (a) is an axial cross-sectional view showing the structure of the first linear oscillator 101 of the present invention. The linear oscillator 101 has a movable part 1 fixed to the shaft 7 , and when a predetermined current flows through the linear oscillator 101 , the movable part 1 reciprocates in the axial direction together with the shaft 7 . That is, the linear oscillator 101 can reciprocate the shaft 7 by passing a predetermined current through the linear oscillator 101 . The linear oscillator 101 is used, for example, in an electric toothbrush as a driving source for a reciprocating brush that vibrates the brush portion back and forth finely to generate mechanical vibrations.

[0030] Each component of the linear oscillator 101 will be described below. The linear...

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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.

Description

technical field [0001] The present invention relates to a linear oscillator and an electric toothbrush performing axial reciprocating vibration. Background technique [0002] The electric toothbrush has various operation modes, such as a reciprocating brushing mode in which the brush part is finely reciprocated back and forth to generate mechanical vibrations, and a rotary brushing mode in which the brush part is rotated. As a driving source for reciprocating brushing therein, the electric toothbrush is equipped with a linear oscillator. The linear oscillator includes a motion direction conversion mechanism that converts the rotational motion of the motor into a reciprocating linear motion, and a movable portion that reciprocates in the axial direction. [0003] Adopting such a moving direction changing mechanism not only has problems such as low energy efficiency and high noise caused by the mechanical loss generated by the moving direction changing mechanism, but also it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C17/34B26B19/28H02K33/04H02K33/08H02P25/02
CPCB26B19/282H02P25/027A61C17/3445H02K33/04H02K33/08H02P25/032H02K33/02
Inventor 国田智裕北村嘉宏薮内英一井上弘幹铃木诚之泉智博山田富男平田胜弘有川泰史一井义孝
Owner PANASONIC CORP
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