Patent ID: 8289627
Filing Date: 2012-10-16
Classification: G02B,G03B

Abstract:
1. A lens barrel comprising: a first optical member configured to have a cam follower provided on an outer periphery thereof; a second optical member configured to be disposed away from said first optical member in a direction of an optical axis, and have a cam follower provided on an outer periphery thereof; and a straight-ahead moving cylinder configured to be formed with a straight-ahead movement guide groove that guides base portions of the respective cam followers of said first optical member and said second optical member in the direction of the optical axis, and to move straight ahead in the direction of the optical axis while being inhibited from rotating, wherein in a base portion of the cam follower of one of said first optical member and said second optical member, there is provided a slide portion that is guided in the direction of the optical axis along both inner wall surfaces of said straight-ahead movement guide groove which face each other in a circumferential direction of said straight-ahead moving cylinder, and the slide portion is provided with a guide portion that guides a base portion of the cam follower of the other of said first optical member and said second optical member in the direction of the optical axis.