| 摘要 |
PROBLEM TO BE SOLVED: To improve accuracy in aligning an optical member.SOLUTION: A lens barrel comprises: a hold member having one of a cam groove and a cam pin which engage with each other, and holding an optical member; and a drive member having the other of the cam groove and the cam pin, and configured to drive the hold member in a moving direction parallel to the optical axis of the optical member. The cam groove has a drive section along which the hold member is driven, and a non-drive section communicating with the end of the drive section and extending in a direction orthogonal to the optical axis. In the lens barrel, the cam groove may engage with the cam pin in the non-drive section when the lens barrel is in a collapsed state. |
