Patent ID: 6232697
Filing Date: 2001-05-15
Classification: G02B,H02N

Abstract:
A driving apparatus comprising:first and second electro-mechanical transducers each extending and contracting in a driving direction;first and second fixed portions secured to an end of the respective first and second electro-mechanical transducers;first and second shafts secured to an other end of the respective first and second electro-mechanical transducers to reciprocate with the extension and contraction of the aforesaid electro-mechanical transducers;first and second moving members held frictionally by the first and second shafts and simultaneously moved; anda drive pulse supplier for causing the slow and rapid displacements of each of the first and second electro-mechanical transducers by supplying drive pulses to the electro-mechanical transducers such that a period during which the first electro-mechanical transducer undergoes rapid displacement does not coincide with a period during which the second electro-mechanical transducer undergoes rapid displacement.