Patent ID: 6485200
Filing Date: 2002-11-26
Classification: G03B

Abstract:
A double-shielding type focal-plane shutter comprising: a closing blade and an opening blade for closing and opening a shutter opening to perform an exposure operation; a closing lever for driving the closing blade, the closing lever having a first closing lever and a second closing lever supported coaxial with each other for undergoing pivotal movement, the second closing lever having a drive portion at a first end thereof for driving the closing blade and an engagement portion at a second end thereof; an opening lever for driving the opening blade; a lock lever for restricting movement of the closing lever and having a first mating engagement portion for engaging the engagement portion of the second closing lever in the predetermined position of the closing lever, and a second mating engagement portion for engaging the engagement portion of the second closing lever short of the predetermined position thereof; and a set lever for undergoing movement to a set position to set the closing lever, the opening lever and the lock lever to predetermined positions.