| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate assembling and reduce the number of components and the cost. <P>SOLUTION: In a drive unit (10), which is equipped with an electromechanical converting element (13), a vibrating member (14) attached to the end (13b) of this electromechanical converting element, and a shifting member (12) frictionally coupled with this vibrating member, and in which the shifting member can move in the direction of expansion and contraction of the electromechanical converting element, the vibrating member (14) has a flexible hook (142) which hooks the shifting member (12) by its elasticity. A spring (15) engages with the vibrating member (14) and the flexible hook (142), and generates pressing force for pressing the flexible hook (142) against the shifting member (12). The vibrating member (14) has a groove (14a) V-shaped in cross section at a frictional coupling part between the vibrating member and the shifting member (12). <P>COPYRIGHT: (C)2009,JPO&INPIT |
