| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel that is small in an energy loss.SOLUTION: A lens barrel 20 according to the present invention comprises: a stationary part (52); a lens holding part (32) that holds a lens (L2); a movement part (41) that is anchored to the lens holding part, and provided movably in an optical axis direction of the lens with respect to the stationary part; and a driving part (51) that is provided at one of the stationary part or the movement part, and drives the movement part in the optical axis direction with respect to the stationary part. The driving part has two driving surfaces (41A and 41B) that are provided to face each other along the optical axis direction, and have electromechanical conversion elements respectively, and the two driving surfaces hold at least one part of the other of the stationary part or the movement part. By an oscillation of the electromechanical conversion element, the movement part is driven to the optical axis direction with respect to the stationary part. |
