JPS55128481A - Printing device - Google Patents

Abstract

PURPOSE: To obtain a printer of smaller type and with little consumption of electricity at low cost through simplification of the structure by connecting a spring member to the end part of an extended member for giving printing operation which is composed of a magnetic material laid in the groove of another magnetic material.

CONSTITUTION: When printing operation is stopped, a hammer H is attracted to a hammer yoke HY by the magnetic force of a permanent-magnet plate Mg. At this time, a hammer-controlling part HC retreats, pressing up a printing spring SG and accumulating a force, and a spring guide SG is also made to retreat. When a printing pulse current flows to a coil S wound on a bobbin according to a printing signal, a magnetic force opposite in polarity to the magnet Mg is generated and, the attraction-maintaining force of the printing hammer H being broken by a magnetic flux ϕ, the hammer H advances toward a printing type K at high speed through the bobbin BO by the energy of a printing spring PS and gives an impacting pressure to the type K by the force of inertia, through the energy of the spring PS reduces on the way, thus the printing being made on printing paper P on a platen PP.

COPYRIGHT: (C)1980,JPO&Japio