| 摘要 |
<p>PROBLEM TO BE SOLVED: To hold a mirror member at a mirror-down position without consuming any electric power.SOLUTION: A mirror driving device includes: a lead screw which is driven by a drive source; a mirror member which can move between a mirror-down position and a mirror-up position; a mirror driving member which moves rectilinearly to drive the mirror member between the mirror-down position and mirror-up position; and restriction means of performing switching between a restriction state in which rectilinear movement of the mirror driving member is restricted and a restriction released state in which the restriction is released, by driving the lead screw. The restriction means performs switching between the restriction state and restriction released state without making the mirror driving member move rectilinearly when the mirror member is at the mirror-up position or mirror-down position, and after the restriction means performs switching from the restriction state to the restriction reset state, the mirror driving member moves rectilinearly linked with the driving of the lead screw.</p> |
