Patent ID: 7995287

Claim:
A lens barrel comprising: a lens holding frame holding a lens; a barrel body housing the lens holding frame; motion conversion means for converting rotary motion of the lens holding frame into reciprocating motion along the optical axis of the lens, the motion conversion means provided between the lens holding frame and the barrel body; a manual ring provided on the outer side of the barrel body and rotating around the optical axis of the lens when manually rotated; a coreless stepper motor provided on the outer side of the barrel body and rotating around the optical axis of the lens; rollers provided between the manual ring and the stepper motor, the rollers rotating not only in synchronization with the rotation of the manual ring but also in synchronization with the rotation of the stepper motor; motor rotation preventing means for preventing the stepper motor from rotating when the rollers transfer the rotation of the manual ring; an intermediate ring rotating around the optical axis of the lens as the rollers rotate; and a transfer unit transferring the rotary motion of the intermediate ring to the lens holding frame.