Patent ID: 8665540
Filing Date: 2014-03-04
Classification: G02B,G03B

Abstract:
1. A lens barrel comprising: a base component; a driver fixed to the base component and configured to produce a driving force; a drive gear fixedly disposed relative to the base component and configured to transmit the driving force produced by the driver; and a rotary frame having a substantially cylindrical shape and a gear component disposed on at least part of the inner peripheral surface of the rotary frame, the gear component meshes with the drive gear so that during rotation of the drive gear the rotary frame rotates, by way of the driving force, relative to the base component and advances and retracts along a rotational axis of the lens barrel, the length of the drive gear is greater than the length of the gear component, and as the rotary frame and the gear component advance and retract, the gear component remains within a range of opposing ends of the drive gear.