Patent ID: 8885267
Filing Date: 2014-11-11
Classification: G02B,G03B

Abstract:
1. A lens barrel that is moved in an optical axis direction between a picture taking position and a retracted position by a zoom drive mechanism, comprising: a lens holding member configured to hold a lens and having a follower part; a rectilinear movement regulating member configured as a barrel that regulates relative rotation of said lens holding member and having a convex part and a rib, both of which being formed on an outside surface of said rectilinear movement regulating member; a cam barrel having a first cam groove with which the follower part is engaged, a second cam groove with which the convex part is engaged, and a cam piece extending from an edge surface at an image surface side of said cam barrel, wherein said first and second cam groove are formed on an inner surface of the cam barrel, and a part of the first cam groove being formed on an inner surface of the cam piece, wherein said rib is arranged in the image surface side than said convex part, an outer surface of the cam piece is arranged so as to face the rib, said rectilinear movement regulating member moves in the optical axis direction together with said cam barrel by the engagement of the convex part and the second cam groove, and said rectilinear movement regulating member moves relatively to said cam barrel by the convex part following along with the second groove as said cam barrel rotates.