Patent ID: 8873163
Filing Date: 2014-10-28
Classification: G02B

Abstract:
1. A lens barrel comprising: a cam drum having a cam groove; a lens holding frame for holding a moving lens group; and a cam follower installed on an outer periphery of the lens holding frame, the lens barrel being configured such that the cam follower engaged with the cam groove moves along the cam groove, and the lens holding frame thereby moves in an axial direction of the cam drum, wherein the cam groove has two groove side walls that are disposed facing each other with a distance in the axial direction, and an inclined wall that extends outward in a radial direction of the cam drum from one of the groove side walls to the other thereof, the cam follower has a cam follower main unit that is disposed between the two groove side walls so as to be contactable with the other of the groove side walls, a contact member that contacts the inclined wall and the cam follower main unit respectively, and a biasing member that biases the contact member outward in the radial direction; and the cam follower main unit has an axial portion and a roller that is rotatably disposed on an outer periphery side of the axial portion.