| 摘要 |
A lens barrel includes a lens frame movable in optical axis directions of a lens, a cam barrel rotated around outside the lens frame to move the lens frame in the optical axis directions, a base supporting the cam barrel to be rotatable and to be immovable in axial directions, and a hollow motor including a rotor and a stator and rotating the cam barrel. The stator supported by the base surrounds the rotor provided outside the cam barrel to be movable in the axial directions and rotate integrally with the cam barrel. As the rotor moves in one of the axial directions, a second locking portion of the base engages with a first locking portion of the rotor to prevent rotation of the rotor. A movement mechanism moves the rotor in the axial directions between a locking position and an unlocking position of the first and second locking portions.
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