Patent ID: 7177102
Filing Date: 2007-02-13
Classification: G02B

Abstract:
1. A lens body tube configured to support at least one lens inside an inner tube such that the at least one lens can be translated along the optical axis direction of the lens body tube, comprising: a cam ring configured to be rotatably supported around the outer circumferential surface of the inner tube, the at least one lens being configured to be translated along the optical axis direction accompanied by the rotation of the cam ring; a plurality of cams provided on the inner circumferential surface of the cam ring, wherein the plurality of cams includes at least two protruded cams, and wherein the at least two protruded cams are connected with a part of each other by a protruding piece provided on the inner circumferential surface of the cam ring; and a plurality of cam followers provided on a lens frame supporting each of the at least one lens, each of the plurality of cam followers being engaged with a corresponding one of the plurality of cams.