Title:
APERTURE DEVICE, DRIVE MOTOR, AND CAMERA
Document Type and Number:
WIPO Patent Application WO/2013/047768
Kind Code:
A1
Abstract:
The present invention reduces the cost of a drive motor used for an aperture device. This aperture device is provided with an aperture drive motor (6) for driving an aperture member forming an aperture through which incident light is allowed to pass. The aperture drive motor (6) is provided with a stator unit (37), a rotor unit (38), and a yoke (39) for housing these units. The rotor unit (38) is provided with a permanent magnet (51) in such a manner that the permanent magnet rotates integrally with the rotor unit. Rotational center axis (J) of the rotor unit (38) is set so as to pass through the centroid part of the permanent magnet (51). The yoke (39) is formed into a cylindrical shape, and the permanent magnet (51) housed therein is formed into a prismatic shape.
Inventors:
KOHRI NAOMICHI (JP)
GOTOH YOUICHI (JP)
TOMARU TAKASHI (JP)
TAKEUCHI SHINJI (JP)
GOTOH YOUICHI (JP)
TOMARU TAKASHI (JP)
TAKEUCHI SHINJI (JP)
Application Number:
PCT/JP2012/075125
Publication Date:
April 04, 2013
Filing Date:
September 28, 2012
Export Citation:
Assignee:
JAPAN PREC INSTR INC (JP)
KOHRI NAOMICHI (JP)
GOTOH YOUICHI (JP)
TOMARU TAKASHI (JP)
TAKEUCHI SHINJI (JP)
KOHRI NAOMICHI (JP)
GOTOH YOUICHI (JP)
TOMARU TAKASHI (JP)
TAKEUCHI SHINJI (JP)
International Classes:
H02K1/27; H02K33/00
Foreign References:
| JP2008187878A | 2008-08-14 | |||
| JP2002315293A | 2002-10-25 | |||
| JPH10333206A | 1998-12-18 | |||
| JP2008003437A | 2008-01-10 |
Attorney, Agent or Firm:
ANIYA Setuo et al. (JP)
Ani store Setsuo (JP)
Ani store Setsuo (JP)
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Claims:
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