| 摘要 |
<p>An actuator is provided and includes: an electro-mechanical conversion element; a driving frictional member attached at one end of the electro-mechanical conversion element with respect to a direction of expansion and contraction of the electro-mechanical conversion element; and a driven member frictionally engaged with the driving frictional member. The driving frictional member has a rod-like shape, and a cross section of the driving frictional member orthogonal to a longitudinal direction thereof is changed along the longitudinal direction.</p> |
