发明名称 |
Lens barrel and optical apparatus |
摘要 |
Provided is a lens barrel capable of providing good operational feeling, the lens barrel including: 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. |
申请公布号 |
US9268109(B2) |
申请公布日期 |
2016.02.23 |
申请号 |
US201214000585 |
申请日期 |
2012.03.12 |
申请人 |
NIKON CORPORATION |
发明人 |
Asayama Masateru |
分类号 |
G02B7/02;G02B7/04;G02B7/10 |
主分类号 |
G02B7/02 |
代理机构 |
|
代理人 |
|
主权项 |
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. |
地址 |
Tokyo JP |