Patent ID: 8547647

Claim:
A lens barrel that holds a lens including a zoom lens for photographing, comprising: a fixing frame that is provided with a cam groove in an inner circumferential surface of the fixing frame; and a drive frame that includes a cam follower formed on an outer circumferential surface of the drive frame, and a plurality of engaging teeth formed on the outer circumferential surface of the drive frame so as to be located on substantially the same circumference as the cam follower, wherein with the drive frame incorporated in the fixing frame, the cam follower is fitted in the cam groove, drive force is transmitted via the engaging teeth, and the drive frame is movable with respect to the fixing frame along an optical axis direction of the lens as the cam follower moves along the cam groove, the cam groove includes at least a first region inclined relative to a circumferential direction of the fixing frame, the fixing frame includes a first protrusion formed along the first region of the cam groove, when the cam follower moves along the first region of the cam groove, the first protrusion is disposed between the cam follower and an engaging tooth that is located closest to the cam follower among a plurality of the engaging teeth.