Patent ID: 7871204
Filing Date: 2011-01-18
Classification: G02B

Abstract:
1. A lens barrel comprising a plurality of lens groups and configured to be capable of placing at least a part of the plurality of lens groups in a retraction status in which the part of the lens groups is, collapsed and at least a part of the plurality of lens groups in a photographing status in which the part of the lens groups is moved toward an object, the plurality of lens groups including a first lens group and a second lens group; and a spring mechanism which is provided between the first lens group and the second lens group; and which has a compression spring function and a torsion coil spring function in combination, wherein a distance between the first lens group and the second lens group in an optical axis direction is variable, wherein the spring mechanism is configured to impart a biasing force in the optical axis direction and a biasing force in a rotational direction in a plane perpendicular to the optical axis to at least one of the first lens group and the second lens group; and wherein the second lens group is fixed to a shutter mechanism in an integrated manner.