| 摘要 |
PROBLEM TO BE SOLVED: To eliminate troublesomeness of preparing accessories such as a plurality of lens caps and filters corresponding to screw diameters different at the tip end of each interchangeable lens. SOLUTION: The lens cap is provided with a 1st plate-form movable member (2), a 2nd plate-form movable member (2a), 1st engagement parts (3) which are partially formed in a ring shape on the plate surface of the 1st movable member (2) and the 2nd movable member (2a) and have screw-thread engagement parts on the outer circumference, 2nd engagement parts (3a) which are partially formed in a ring shape on the plate surface of the 1st movable member (2) and the 2nd movable member (2a) and have screw-thread engagement parts on the outer circumference, an energizing means (5) for energizing the 1st movable ember (2) and the 2nd movable member (2a), and a disk-shape holding member (1) for holding the 1st movable ember (2), the 2nd movable member (2a) and the energizing means (5), and is characterized in that the 1st engagement part, the 2nd engagement part and the holding member are formed almost coaxially, and the energizing means energizes the 1st movable member and the 2nd movable member in the direction away from the center of the coaxial circle. COPYRIGHT: (C)2004,JPO
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