Title:
【発明の名称】カメラの絞り駆動装置
Document Type and Number:
Japanese Patent JP2595219
Kind Code:
B2
Abstract:
PURPOSE:To realize a reduced thickness and a small size of the title device by providing rotor yokes oppositely to a rotor magnet on a rotary shaft. CONSTITUTION:Rotor yokes 10A, 10B are secured to both ends of an output shaft 2 at a predetermined gap to a device body, and all provided concentrically with the shaft 2 in the state that a rotor yoke 10c is interposed between rotor magnets 1A and 1B. A magnetic circuit in which a line of magnetic force is returned from the magnet 1A through the yoke 1A and the shaft 2 to the magnet 1A and a line of magnetic force from the magnet 1B is returned through the yoke 1B and the shaft 2 to the magnet 1B is constructed, a magnetic field distribution is uniform with respect to the circumferential direction of the rotor.
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| JPS57153561 | MAGNETIC SHIELDING DEVICE FOR TAPE RECORDER |
Inventors:
Nozue Hitoshi
Osamu Horiguchi
Osamu Horiguchi
Application Number:
JP31401586A
Publication Date:
April 02, 1997
Filing Date:
December 27, 1986
Export Citation:
Assignee:
Canon Electronics Co., Ltd.
International Classes:
H02K29/00; G03B7/20; G03B9/02; H02K1/27; H02K21/12; (IPC1-7): H02K21/12; G03B7/20; G03B9/02
Domestic Patent References:
| JP5112613A | ||||
| JP49149911U | ||||
| JP5138612U | ||||
| JP58139894U | ||||
| JP58121176U | ||||
| JP57108671U | ||||
| JP59161384U |
Attorney, Agent or Firm:
Yoshikazu Tani