| 摘要 |
<p>This invention makes it possible to reduce the size of a drive unit when a driven body comprises a tetragonal object. Said driven body comprises a tetragonal object that has a tetragonal shape when viewed in the drive direction. A force-applying point on an actuator applies a force to a force-application point on the driven body so as to drive said driven body in the aforementioned drive direction. A link member or a spring extends along a first side of the tetragonal object, and the actuator extends along a second side of the tetragonal object.</p> |
