| 摘要 |
A camera includes a positioning member arranged to determine a mirror-down position of a mirror holder 504. A rotating member 512 is mounted to the positioning member, and an urging member 510 is arranged to urge the rotating member. The mirror holder includes a cam portion 504b. The rotating member includes a follower portion 512c arranged to be able to trace the cam portion. When the mirror holder is at the mirror-down position, the follower portion traces a first region of the cam portion to urger the mirror holder toward the mirror-down positionby an urging force of the urging member. When the mirror holder is at the mirror-up position, the follower portion traces a second region of the cam portion to urge the mirror holder toward the mirror-up position by the urging force of the urging member.
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