Patent ID: 8300333

Claim:
A lens barrel that transmits a rotation force of a ring-shaped oscillating wave motor or a manual adjustment ring to a distance adjustment ring for driving a lens, to move a position of a focus lens, the lens barrel comprising: a manual adjustment ring; a ring-shaped oscillating wave motor; a distance adjustment ring; a fixing part; and a clutch assembly which is disposed on a plane orthogonal to an optical axis between the manual adjustment ring and the distance adjustment ring and that rotates on the fixing part of the lens barrel, the clutch assembly comprising: a first clutch wheel that includes an operator disposed on an end thereof and receives a rotation force of the manual adjustment ring; a second clutch wheel disposed on an inner surface of the first clutch wheel; a third clutch wheel disposed on an inner surface of the second clutch wheel and fixed to the distance adjustment ring; at least one roller radially disposed with respect to the optical axis and comprising a surface contacting the operator of the first clutch wheel and another surface contacting an outer surface of the third clutch wheel; a plurality of first elastic members that elastically fix the first and second clutch wheels to each other; a second elastic member disposed between the second clutch wheel and the fixing part; and a third elastic member disposed at both ends of the second clutch wheel, that supports ends of circumferential surfaces of the rollers, and that controls positions of the rollers.