| 摘要 |
PURPOSE:To perform high-speed printing, by a method wherein an armature and a leaf spring are formed as one body, and bent portion is formed at both side edges of the leaf spring serving as the armature and thereby forming a magnetic flux flowing surface. CONSTITUTION:When a coil 9 is not energized, i.e. at non-printing state, a leaf spring 10 is attracted to a core 2 by means of flux from a permanent magnet 3 and the elastic energy is stored. If the coil 9 is energized for printing command in this state, flux having reverse polarity to that of the permanent magnet 3 is generated in the core 2 and the magnetic force of the permanent magnet 3 is canceled thereby the leaf spring 10 is restored by the stored elastic energy and a wire 8 is moved towards a platen so as to perform printing. In this constitution, one leaf spring serves also as an armature thereby weight of the device is reduced by that corresponding to the armature and the high-speed printing can be performed. |
