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Title:
MAGNETIC DRIVER, MANUFACTURING METHOD THEREOF, LIGHT ADJUSTING DEVICE, AND OPTICAL INSTRUMENT
Document Type and Number:
Japanese Patent JP2011227195
Kind Code:
A
Abstract:

To provide a magnetic driver, averting the number of components from increasing, and the configuration from becoming complex, miniaturizing the outer shape, and enabling a yoke to be firmly positioned with respect to a rotor magnet.

The magnetic driver comprises: a rotor magnet 1; a coil bobbin 4 around which a coil is wound and which has a through-hole in a central part; a yoke 5, 3 including a straight portion to be inserted in the through-hole and an arc-shaped portion connected to the tip end of the straight portion; a support member 2 rotatably supporting the rotor magnet; and a thrust receiving member 6 including an engagement part engaged with the supporting member, and having one surface regulating one end of the rotor magnet in a thrust direction and another surface on which the coil bobbin is placed, and which is held between the arc-shaped portion of the yoke and the coil bobbin. The yoke is assembled as an integrated yoke, by inserting the straight portion in the through-hole of the coil bobbin, and affixing the straight portion to the arc-shaped portion which is a separate body.


Inventors:
MAEKAWA SATOSHI
KUROSAWA AKIRA
Application Number:
JP2010095234A
Publication Date:
November 10, 2011
Filing Date:
April 16, 2010
Export Citation:
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Assignee:
CANON DENSHI KK
International Classes:
G03B9/02; G03B9/10; H02K33/16
Domestic Patent References:
JP2005102354A2005-04-14
JP2003052162A2003-02-21
JP2003059021A2003-02-28
JP2007072356A2007-03-22
JP2006333606A2006-12-07
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu