Patent ID: 8441742
Filing Date: 2013-05-14
Classification: G02B

Abstract:
1. A lens barrel comprising: a plurality of lens units movable in a direction of an optical axis; a driving unit including an annular actuator in which the optical axis serves as a rotation center; a first cam cylinder including a circular cylindrical base portion disposed inside the annular actuator and configured to rotate so as to drive at least one of the plurality of lens units, and a large-diameter portion disposed closer to a lens unit holding frame closest to an object side than the base portion and having an outside diameter larger than an outside diameter of the base portion; a second cam cylinder configured to drive the lens unit holding frame closest to the object side as a result of rotating at an outer-peripheral side of the large-diameter portion; and a rotation transmitting portion provided at the large-diameter portion, the rotation transmitting portion being configured to transmit rotation of the first cam cylinder to the second cam cylinder, wherein, when the lens barrel is shortest, the rotation transmitting portion overlaps a part of the second cam cylinder on a side of an outer periphery of a part of the lens unit holding frame closest to the object side.