| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent variation in frictional force from occurring between drive devices and provide a drive device using an energizing member more inexpensive than leaf springs. <P>SOLUTION: The drive device includes: a piezoelectric element 101 that expands and contracts when voltage is applied; and a driving shaft 103 that slidably supports a movable body 10 and is coupled with the piezoelectric element 101 and is displaced together with the piezoelectric element 101. The driving device is so constructed that the movable body 10 is driven along the driving shaft 103 by the expansion and contraction of the piezoelectric element 101. The movable body 10 includes: a slider 12; a clamping member 14 assembled to the slider 12 so that it clamps the driving shaft 103; and a coil spring 16 that energizes the clamping member 14 toward the driving shaft 103. When the clamping member 14 is energized by the coil spring 16, a part of the clamping member 14 is abutted against the driving shaft 103 and the other part of the clamping member 14 is held by the slider 12 on a section perpendicular to the direction of movement of the movable body 10. <P>COPYRIGHT: (C)2007,JPO&INPIT |
