DRIVE REGULATION STRUCTURE OF PIEZOELECTRIC ACTUATOR AND LENS DRIVE EQUIPPED WITH THE SAME

摘要

A drive regulation structure of a piezoelectric actuator for efficiently regulating parallel translation of the rotating shaft of the piezoelectric actuator without causing any damage on the peripheral member or abrasion thereof. The drive regulation structure of a piezoelectric actuator for rotating the rotating shaft by controlling application of a voltage to a piezoelectric element and translating the rotating shaft to the axial direction is characterized by comprising a stopper (7c) projecting in the direction intersecting the axial direction of a rotating shaft (7b) perpendicularly and rotating integrally with the rotating shaft (7b), and regulation pieces (16a, 16b) abutting against the stopper (7c) when the rotating shaft (7b) translates up to a predetermined position and regulating rotation of the rotating shaft (7b).