| 摘要 |
PURPOSE:To provide the wire drive apparatus of a printer free from magnetic interference, reduced in power consumption and high in reliability, constituted of a surface wave generating mechanism, a slide plate having a printing wire secured thereto and a pressure contact mechanism of which the piezoelectric element for pressing the latter to the former is formed of a bimorph structure. CONSTITUTION:A surface wave generating mechanism 8 is constituted of a metal elastomer 8a having a surface high in friction coefficient and a piezoelectric element 8b for imparting vibration to said elastomer to generate an elastic wave to the surface thereof. A pressure contact mechanism 9, which presses a slide plate 2 having a printing wire 1 secured thereto the surface wave generating mechanism 8 to control the operation of the slide plate 2, is constituted by providing a slide piece 9c low in friction coefficient and high in wear resistant property to the leading end part of a bimorph structure formed by adhering piezoelectric elements 9b to both surfaces of a metal plate 9a. |
