ANTRIEBSMECHANISMUS

A driving mechanism comprises: (i) an actuator comprising: an electro-mechanical conversion element; a driving member which is connected to one end of the electro-mechanical conversion element and moves according to elongation or contraction of the electro-mechanical conversion element; and a weight member provided on the other end of the electro-mechanical conversion element; (ii) a driven member frictionally engaged with the driving member; and (iii) a driving circuit that drives the actuator, wherein the actuator allows the driven member to move along the driving member, and the driving circuit drives the electro-mechanical conversion element at a driving frequency f which gives f‰¥2 1/2 ·f 0 when resonance frequency of a 1-freedom system is f 0 in which the electro-mechanical conversion element and the driving member are designated as a mass and the weight member is designated as a spring, and driving frequency of the electro-mechanical conversion element is f.