| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a finger from being put on a focal-plane shutter film so as to prevent the separation of the film by maintaining the shutter film in an open state when a back cover is opened. SOLUTION: When the back cover is opened, a back cover switch S1 senses it and outputs a corresponding signal to a control part 2. The control part 2 inputs a signal from the switch S1 and outputs a control signal for making the focal-plane shutter film in the open state to a shutter driving part 3. When the back cover 2 is closed, the control part 2 inputs the corresponding signal from the switch S1 and outputs the control signal for recovering the focal-plane shutter film to an initial state to the driving part 3. Namely, when the back cover is opened, both a front film and a rear film are maintained in a folded state so as to prevent the separation of the film.</p> |
