Patent ID: 6071019
Filing Date: 2000-06-06
Classification: G03B

Abstract:
A shutter device comprising:a) a shutter blade;b) a first driving lever which engages said shutter blade and which is arranged to move so as to cause said shutter blade to perform an exposure action;c) a first spring which gives said first driving lever an urging force in such a direction as to cause said shutter blade to perform the exposure action;d) a latch member which locks said first driving lever in an exposure start position against the urging force of said first spring and which allows said shutter blade to start the exposure action by unlocking said first driving lever;e) a second driving lever which pushes said first driving lever from behind during the exposure action;f) a second spring which gives said second driving lever an urging force in the same direction as the urging force of said first spring; andg) a charge mechanism which, after the exposure action is performed by said shutter blade, causes said first spring and said second spring to be overcharged by moving said first driving lever and said second driving lever to an overcharging position and which, after that, returns to an initial position,wherein said first driving lever and said second driving lever are arranged to be moved from the overcharging position to the exposure start position by the urging forces of said first spring and said second spring, andwherein, after moving said first driving lever and said second driving lever to the overcharging position, said charge mechanism is urged toward the initial position by the urging force of said second spring obtained while said second driving lever is being moved from the overcharging position to the exposure start position.