| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel capable of being reduced in size and surely fixing two cylindrical members.SOLUTION: A lens barrel 10 includes a focus ring base 25, a focus ring cover 26, a protrusion 25c, a protrusion 25d, and a plurality of convex parts 26c. The focus ring cover 26 is fixed to an outer peripheral surface 25b of the focus ring base 25. The protrusion 25c is provided at the outer peripheral surface 25b of the focus ring base 25. The protrusion 25d is provided at a position shifting in an axial direction with respect to the protrusion 25c at the outer peripheral surface 25b of the focus ring base 25. The plurality of convex parts 26c are provided, in a belt-like shape, in an inner peripheral surface 26b of the focus ring cover 26. The protrusion 25d is locked to end surfaces of the convex parts 26c to limit the movement of the focus ring base 25 in the axial direction. The protrusion 25c is engaged with a concave part 26d formed between the plurality of convex parts 26c to limit the movement of the focus ring base 25 in a rotation direction with respect to the focus ring cover 26.SELECTED DRAWING: Figure 8 |
