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Title:
FOCAL PLANE SHUTTER AND OPTICAL APPARATUS
Document Type and Number:
Japanese Patent JP2012118143
Kind Code:
A
Abstract:

To provide a focal plane shutter suppressing dispersion in driving timings of a curtain, and to provide an optical apparatus including the same.

This focal plane shutter includes: a board including an opening; a curtain capable of opening and closing the opening; a drive lever holding a movable steel piece, swingably supported, and driving the curtain; a self-holding type solenoid capable of adsorbing the movable steel piece in a non-energized state by a given attraction force, and reducing the given attraction force in an energized state; an energizing member energizing the drive lever to move the drive lever away from the self-holding type solenoid; and a set member moving the drive lever so as to bring the drive lever in contact with the self-holding type solenoid. When the drive lever is swung by the set member to bring the movable steel piece in contact with the self-holding type solenoid, the self-holding type solenoid is energized to reduce the given attraction force.


Inventors:
NAKANO YOICHI
MIKAMI MAKOTO
NEMOTO CHIAKI
Application Number:
JP2010265797A
Publication Date:
June 21, 2012
Filing Date:
November 29, 2010
Export Citation:
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Assignee:
SEIKO PRECISION KK
International Classes:
G03B9/36
Domestic Patent References:
JP2010152000A2010-07-08
JPS5678313U1981-06-25
JP2007240783A2007-09-20
JP2002086298A2002-03-26
Attorney, Agent or Firm:
Shuhei Katayama
Kikuchi