| 摘要 |
PURPOSE:To maintain a predetermined amplitude for a long term while making the driving device suitable to drive at high speed by radially arranging a plurality of drive levers while supporting the printing wire to the drive levers through a drive spring. CONSTITUTION:The wire driving device is constituted in such a manner that a plurality of the drive levers 5 are radially disposed centering around a hollow hole 3 while the printing wires 9 are supported to the drive levers 5 through the drive springs 6. The drive levers 5 are oscillated in the counterclockwise direction centering around a shaft 4 by flowing currents through an electromagnetic coil 14, the oscillating movement is transmitted to the printing wires 9 through the drive springs 6, the printing wires 9 are operated rectilinearly, and printing is conducted. Accordingly, the springs 6 are bent due to inertia even after the printing wires 9 or the levers 5 collides with a yoke and stop, the printing wires 9 can be flown out in the printing surface direction, and the oscillation of the drive levers 5 is not affected by the wear of the tips of the printing wires 9 and predetermined amplitude can be kept. |
