| 摘要 |
A lens barrel includes a first cylinder, a second cylinder configured to rotate around an optical axis relative to the first cylinder and to move a lens holding frame holding a lens in an optical axis direction, a force unit arranged outside of the second cylinder, a force relay member arranged outside of the second cylinder and configured to contact the force unit, a first roller fixed to the force relay unit and configured to contact a first surface of the second cylinder, and to transmit a force to the first surface of the second cylinder, the force being applied by the force unit and relayed by the force relay unit; and a second roller fixed to the first cylinder, and configured to contact a second surface inside of the second cylinder, and to restrict a movement of the second cylinder in the optical axis direction by the force. |
