PRINTING WIRE DRIVING APPARATUS

PURPOSE:To provide the wire driving apparatus of a printer enabled in stable driving over a long period of time, constituted so that the friction coefficient of the surface, which is contacted with a surface wave generating mechanism, of a slide plate having printing wire secured thereto is made large and that of the contact surface with a pressure contact mechanism in the opposite side thereof is made small. CONSTITUTION:In a printer for performing printing while a slide plate 2 having a printing wire 1 secured thereto is pressed to a surface wave generating mechanism 8 by a pressure contact mechanism 9 to control the slide plate 2, the friction coefficient of the surface, which is contacted with the surface wave generating mechanism 8, of the slide plate 2 is made large and that of the surface, which is contacted with the pressure contact mechanism 9, in the opposite side thereof is made small. The 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 the surface of said elastomer 8a to generate an elastic wave to the surface thereof.