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.
MIKAMI MAKOTO
NEMOTO CHIAKI
JP2010152000A | 2010-07-08 | |||
JPS5678313U | 1981-06-25 | |||
JP2007240783A | 2007-09-20 | |||
JP2002086298A | 2002-03-26 |
Kikuchi