Programmed shutter device

A programmed shutter device comprising:

• a charge mechanism to be charged with a driving force for rotation in response to a film winding operation;
• a shutter driving mechanism connected to the charge mechanism to be rotated by the driving force for rotation which is charged in the charge mechanism;
• a start position regulating member movable between a first position where the regulating member comes in contact with the shutter driving mechanism to stop the rotation of the shutter driving mechanism and a second position where the regulating member is released from the contact with the shutter driving mechanism to allow the rotation of the shutter driving mechanism;
• a release controll means holding the start position regulating member in the first position and releasing the hold of the start position regulating member to shift the start position regulating member to the second position;
• a shutter sector means to define the size of an exposure hole movable between a third position to close the exposure hole and fourth position to define the exposure hole;
• a connecting mechanism having an elastic member, the connecting mechanism connected to the shutter driving mechanism to be forward and backward reciprocated by the rotation of the shutter driving mechanism, and connected to the shutter sector means to move the shutter sector means from the third position to the fourth position by the elastic member during the forward motion and from the fourth position to the third position by the rotation of the shutter driving mechanism during the backward motion;
• a shutter speed determining member movable between a fifth position where the shutter speed determining member is brought in contact with the shutter driving mechanism to stop the rotation of the shutter driving mechanism when the connecting mechanism is completed the forward motion and a sixth position where the shutter speed determining member is released from the contact with the shutter driving mechanism to allow the rotation of the shutter driving mechanism;
• a shutter speed control means holding the shutter speed determining member in the fifth position for a fixed time in accordance with the light reflected from a foreground subject and releasing the hold of the shutter speed determiming member to shift the shutter speed determining member to the sixth position;
• a speed control mechanism controlling speed of the forward motion of the connecting mechanism to control the speed of the movement of the shutter sector means from the third position to the fourth position.