| 摘要 |
PURPOSE:To directly turn a lens moving cam ring with an ultrasonic motor having the center of a rotation at a different axis from an optical axis. CONSTITUTION:A cam ring 38 is fitted in the outer periphery of a motor pedestal 37 so as to have the center of the rotation at the same axis as the center of the rotation of the ultrasonic motor 36, so that an output pin 39 extended outward in the diameter direction from the output member 36c of the ultrasonic motor 36 is fitted in a fitting hole 38b from the inner diameter side of the cam ring 38 without backlash. Thus, the output member 36c and the cam ring 38 are integrated, and the driving force of the rotor 36b of the ultrasonic motor 36 is directly transmitted to the cam ring 38 without necessitating a reduction gear system. |
