Title:
アクチュエータ及び光量調節装置
Document Type and Number:
Japanese Patent JP4012170
Kind Code:
B2
Abstract:
An actuator maintains high efficiency, can react to an increase in pole, has a high part fit, and can be manufactured at low cost while it is thinned. The actuator includes a magnet which is formed in a ring shape, in which at least one surface perpendicular to a central axis thereof is divided in a peripheral direction and alternately plane-magnetized in different poles; a stator including a plurality of magnetic pole teeth opposed to the magnetized surface of the magnet; a rotor, which is held to be rotatable about a rotational axis as a center, includes a disk portion whose surface perpendicular to the rotational axis is bonded to the magnet, and is made of a soft magnetic material; and a coil, which is located on substantially the same surface as that of the magnet, is fixed to the stator, and excites the stator and the disk portion.
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Inventors:
Miyawaki Makoto
Application Number:
JP2004144377A
Publication Date:
November 21, 2007
Filing Date:
May 14, 2004
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B9/02; G03B9/08; H02K37/12; H02K5/16; H02K7/14; H02K19/38; H02K26/00; H02K37/00; H02K37/24
Domestic Patent References:
| JP53093615U | ||||
| JP63031494A | ||||
| JP3039377U | ||||
| JP2001298938A | ||||
| JP54120814A | ||||
| JP59226647A | ||||
| JP9327163A |
Attorney, Agent or Firm:
Minoru Nakamura