Title:
MAGNETIC DRIVING DEVICE, LIGHT QUANTITY DIAPHRAGM DEVICE AND OPTICAL INSTRUMENT
Document Type and Number:
Japanese Patent JP2013178558
Kind Code:
A
Abstract:
To strongly position a yoke to a rotor magnet while simplifying a shape as the entire component.
A magnetic driving device includes: a rotor magnet 1; a coil bobbin 4 around which a coil is wound, and which has a through-hole at a center part; a yoke composed of a rod-like integrated object inserted to the through-hole; a pair of magnetic pole members 3 in a circular arc shape respectively fixed to both ends of the yoke; a regulation member 6 for regulating one end of the rotor magnet in a thrust direction; an upper ground plate 7 for fixing the coil bobbin, the yoke and the regulation member; and a lower ground plate 2 connected with the upper ground plate, for rotatably supporting the other end of the rotor magnet.
Inventors:
MAEKAWA SATOSHI
KUROSAWA AKIRA
KUROSAWA AKIRA
Application Number:
JP2013093028A
Publication Date:
September 09, 2013
Filing Date:
April 25, 2013
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G03B9/10; G03B9/02; G03B9/26; H02K1/14; H02K33/16
Domestic Patent References:
JPH1032969A | 1998-02-03 | |||
JP2003052162A | 2003-02-21 | |||
JP2008187832A | 2008-08-14 | |||
JP2000324787A | 2000-11-24 | |||
JP2007093912A | 2007-04-12 | |||
JP2006025491A | 2006-01-26 |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
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