| 摘要 |
There is provided a lens barrel and the like, which permits downsizing along the optical axis direction and in which the slide resistance is reduced. A lens barrel (110) includes a holder (13), a lens frame (15), and an elastic member (21). The holder includes a first guide axis (19) and a second guide axis (20). The lens frame includes a first guide section (50, 53) which is movably fitted around the first guide axis and a second guide section (51) which is movably fitted around the second guide axis, and retains at least one lens (17). The elastic member exerts an energizing force on the second guide section and is disposed between the holder and the second guide section. The lens frame moves along the optical axis direction of the lens as the first guide section is guided by the first guide axis. The elastic member energizes the lens frame along the optical axis direction of the lens by exerting an energizing force on the second guide section. The distance from the holder to the second guide section is different from that from the holder to the first guide section.
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