Title:
振動型リニアアクチュエータ及びそれを用いた電動歯ブラシ
Document Type and Number:
Japanese Patent JP4155101
Kind Code:
B2
Abstract:
In a reciprocal linear driving actuator used as a drive source of a power toothbrush, two permanent magnets are formed substantially disc shape or substantially tubular shape, and fitted to and fixed on a shaft directly or via a spacer with a predetermined distance in axial direction of the shaft, so that a moving object is constituted by the shaft and the permanent magnets. On the other hand, a tubular shaped stator, which is constituted by a coil wound around a bobbin and stationary yokes and so on, is provided to face side faces of the permanent magnets of the moving object via a predetermined clearance so that a center axis thereof becomes coaxial with the center axis of the shaft. By supplying alternating current to the coil, the moving object is driven reciprocally and linearly in the axial direction of the shaft.
Inventors:
Hiroaki Shimizu
Ryo Motohashi
Eiichi Yabuuchi
Nishinaka Takahiro
Ryo Motohashi
Eiichi Yabuuchi
Nishinaka Takahiro
Application Number:
JP2003139571A
Publication Date:
September 24, 2008
Filing Date:
May 16, 2003
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
A61C17/22; H02K33/04; A61C17/00; H02K33/06; H02K33/16
Domestic Patent References:
| JP63243472A | ||||
| JP2002218727A | ||||
| JP2002199689A | ||||
| JP2002286133A | ||||
| JP11155273A |
Attorney, Agent or Firm:
Keisei Nishikawa
Atsuo Mori
Atsuo Mori