| 摘要 |
PURPOSE:To provide high efficiency and small size by providing driving piezoelectric elements on both side faces of a disclike base having a through hole for a slider at its center, and exciting it. CONSTITUTION:A base 1 of an elastic material is formed in a disclike state formed with a through hole 1a at its center, and annular platelike piezoelectric elements 3-4 are secured to both side faces of the base 1. A cylindrical slider 2 to be moved is engaged with the hole 1a of the base 1, a cutout 2a parallel to the axis is formed at the slider 2 to provide radial spring characteristic. Thus, the base 1 can simultaneously generate a bending mode and a radial mode of the elements 3-4 for forming a disclike bimorph, and the slider 2 can be axially driven. |
