| 摘要 |
PROBLEM TO BE SOLVED: To improve productivity of a rack assembly.SOLUTION: The lens barrel comprises: a holding member that holds an optical member; a stationary tube that supports the holding member movably in an optical axis direction of the optical member; a rotary tube that rotates with respect to the stationary tube, and imparts the holding member a drive force; a regulation part that regulates a rotary movement of the rotary tube to the stationary tube; an operation part that rotates integrally with the rotary tube, and displaces in a first direction by an operation from an outside; and a coupling part that couples the operation part and the regulation part, converts a displacement of the operation part into a displacement in a second direction different from the first direction and releases the regulation by the regulation part. |
