| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of securing excellent impact resistance of a lens barrel without making the lens barrel larger.SOLUTION: A lens barrel comprises: a fixed barrel 700 which has a plurality of cam pins 700c arranged on an outer peripheral part thereof, and has a flange part 700f arranged on an outer peripheral end part of the subject side thereof; a stopper member 911 which is fixedly disposed substantially coaxially with the fixed barrel 700, and has a plurality of projections 911b arranged on an outer peripheral part thereof; and a cam barrel 800 which has cam grooves 800d, with which the cam pins 700c are cam-engaged, formed on an inner peripheral part thereof, and has second cam grooves 800i with the same locus as that of the cam grooves 800d formed, the projections 911b being cam-engaged with the cam grooves 800d at positions in an image surface side apart from the cam grooves in the optical axis direction, and which is rotationally moved in the optical axis direction by the cam-engagement of the cam pins 700c and the projections 911b with the cam grooves 800d and 800i. Side walls of the cam grooves 800i on the image surface side are open in an area where the cam barrel 800 is moved to the subject side, getting closer to the flange part 700f.SELECTED DRAWING: Figure 11 |
