| 摘要 |
A shutter for a camera having a small size is driven by coil patterns formed in a spiral shape on at least one of a fixed printed board and a movable printed board. On faces of a shutter base plate and a sector ring opposed to each other, a cam mechanism for making the sector ring progress and regress in an optical axis direction is provided. The cam mechanism comprises end face cams arranged in a concentric shape and cam followers corresponding thereto to facilitate pivoting of the sector ring in closing the shutter by moving the cam followers along downwardly inclined faces of the cams.
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