| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel capable of suppressing an operation sound when a zoom lens is driven while retracting a retracting lens group to the outside with respect to an internal diameter of a fixed cylindrical part. SOLUTION: A lens barrel 10 includes: a movable lens barrel holding a plurality of lens holding frames, each of which holds a plurality of lens groups, inside that is held inside of a fixed cylindrical part 21a so as to move in a collapsed state and a photographic state; the plurality of lens holding frames, each of which brings all lens groups to a photographic position so as to be aligned on the same photographic optical axis in the photographic state; and a retracting lens holding frame (31) being movable and holding retracting lenses so as to retract the retracting lenses toward a retracting position outside of the fixed cylindrical part 21a in the collapsed state. The lens barrel 10 further comprises: a movable lens barrel driving source (51) for operating the movable lens barrel; and a retracting frame driving source (52) for moving the retracting lens holding frame (31) between the photographic position and the retracting position. The retracting lens holding frame (31) is driven forward and backward along the photographic optical axis OA direction by driving force through the movable lens barrel driving source (51) in the photographic position. COPYRIGHT: (C)2012,JPO&INPIT |
