Patent ID: 9268109
Filing Date: 2016-02-23
CPC Classification: G02B

Claim Text:
1. A lens barrel comprising: a first barrel in which a cam groove having a shape curved with respect to a predetermined axis direction is formed to pierce through the first barrel; a second barrel capable of rotating around the predetermined axis along an outer circumferential surface of the first barrel, a straight groove extending in the predetermined axis direction being formed in the second barrel; a moving member that has a cam pin moving along the cam groove and the straight groove and moves in the predetermined axis direction while holding a lens inside the first barrel as the second barrel rotates with respect to the first barrel; and a damping mechanism that applies damping force depending on an angle of the cam groove to the predetermined axis direction to the second barrel, wherein the damping mechanism includes a contacting member that is provided in the outer circumferential surface of the first barrel and makes contact with at least a part of an inner circumferential surface of the second barrel, and the contacting member has a contacting/non-contacting state with the inner circumferential surface of the second barrel that is changed in accordance with a position of the cam pin in the cam groove.