Patent ID: 8428452
Filing Date: 2013-04-23
Classification: G02B,G03B,H02N

Abstract:
1. A driving mechanism comprising: a plurality of driving members that are arranged in a circumferential shape around a reference shaft; a base member that holds the plurality of driving members with each interposed in the circumferential direction; a first piezoelectric element that vibrates in a thickness-shear vibration mode in a first direction; and a second piezoelectric element that vibrates in the thickness-shear vibration mode in a second direction different from the first direction, wherein the driving members each comprises a first member that is driven to vibrate in the first direction by the first piezoelectric element and a second member that is driven to vibrate in the second direction by the second piezoelectric element, wherein the first member supports the first piezoelectric element on a first face parallel to the first direction and supports the second piezoelectric element on a second face parallel to the second direction, wherein the base member supports one driving member of two driving members adjacent to each other in the circumferential direction between a first support face and the first piezoelectric element which is supported by the first member of the one driving member, and supports the other driving member between a second support face and the first piezoelectric element which is supported by the first member of the other driving member, and wherein the base member is formed so that the angle formed by the first support face and the second support face is equal to or greater than 60°.