IMPACT DOT HEAD

PURPOSE:To reduce magnetic interference and to enhance energy efficiency by forming a magnetic loop passing the armature, an electricity generating core and base provided to a leaf spring to which magnetic flux is opposed by mounting the electricity generating core between the cores constituting an electromagnet so as to hold the core and base in common. CONSTITUTION:An armature 9 is formed to a leaf spring 6 in opposed relation to cores 1 and attracted to the cores 1 by the magnetic flux 16 from a permanent magnet 4. The leaf spring 6 becomes a state storing low energy. An electricity generating core 14 is positioned between the cores 1 constituting an electromagnet and, when magnetic flux negating the magnetic flux of the permanent magnet 4 is generated by supplying a current to a coil 2, the armature 9 is released from the cores 1 and the strain energy of the leaf spring is converted to the kinetic energy of a wire to perform printing. In this case, magnetic flux is generated by supplying a current to the coil 2 and enters the electricity generating core 14 through the cores 1, the armature 9 and a side york 7 and hardly flows to the adjacent cores 1. As a result, no magnetic interference is generated.