| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive mechanism preventing slip between an elastic component and a rotor used in an actuator such as a vibration motor even if the torque lowers between them when not energized, and provide a lens barrel using it. SOLUTION: This drive mechanism has an operation ring 3 receiving the drive power from the operating component 4, a drive ring 9 receiving the drive power from the actuator 20, an output ring 5 to transmit the drive power to the optical component 8a, and a planetary roller 6 attached to the output ring 5 to selectively transmit the drive power from one of the operation ring 3 and the drive ring 9 to the output ring 5 and to slide one end 3a of the operation ring 3 and one end 9a of the drive ring 9. The sliding surface 3a of the planetary roller 6 on the operation ring 3 is made of a material having a friction lower than that of the main part of the operation ring. COPYRIGHT: (C)2008,JPO&INPIT |
