| 主权项 |
1. A shutter device comprising:
a motor; a control unit to control driving of the motor; a cam member on which a cam portion is formed, and driven by the motor; a light-shielding member on which an engaging portion that engages the cam portion is formed, and is movable between a closed state where an aperture is closed and an opened state where the aperture is opened in conjunction with the cam member being driven; and a detecting unit to detect that the light-shielding member has passed a predetermined position when the light-shielding member moving to the closed state and to the opened state; wherein the cam portion is provided with a first zone where the light-shielding member maintains the closed state or the opened state even if the cam member is driven by the motor, and a second zone where the light-shielding member moves from the closed state to the opened state or from the opened state to the closed state if the cam member is driven by the motor, wherein the first zone and the second zone are provided to the cam portion such that, when the cam member being driven in one direction, the engaging portion follows through the first zone, and thereafter the engaging portion follows through the second zone, and wherein the control unit changes at least one of a driving start timing at the time of driving the motor and a driving speed at the time of driving the motor, based on the detection results of the detecting unit. |
