Printing head of wire dot printer

Abstract

Abstract PURPOSE:To miniaturize a printing head, by providing a printing wire and the magnetic passage frame of a wire driving apparatus in such relation that the center of the cross area of the magnetic flux passage of the magnetic passage frame is positioned on a plane drawn by using the axial line of the wire as a surface. CONSTITUTION:24 numbers of print wires 4 are inserted into a guide cylinder 3 provided to a base 1 and 24 numbers of wire driving apparatuses 5 independently advancing and retracting each wires 4 are connected to the base end sides of each wires 4. In addition, the wire drive apparatus 5 is constituted from a magnetic passage frame 11, a permanent magnet 12, an armature core 14 and a coil 6 and the wire 4 and the magnetic passage frame 11 are provided in such relation that the center of the cross area of the magnetic flux passage of the magnetic frame 11 is positioned on a plane drawn by using the axial line of the wire 4 as a surface over each part. By this structure, the traverse width of the wire drive apparatus 5 can be sufficiently narrowed and, even in the case of 24 dot constitution, the increase of a head diameter can be prevented.

Inventors

• 👤 Noboru Yamada
• 👤 昇 山田

Bibliographic Details