JPS57125071A - Small printer - Google Patents

Abstract

PURPOSE:To make printing speed faster with a low torque and raise reliability of a small printer by selecting the whole columns by the rotation of a selective claw control shaft without vibrating the coil. CONSTITUTION:When a groove section 231 that corresponds to a desired type 22 comes opposite to the protruding section 241 of a type ring claw 24, electricity is flown through a coil block 27 to move a suction plate 28 in the direction of the arrow mark (d). At this time the suction plate 28 is arranged so that it can drive the selection claw 251 of odd number columns and the selection claw 252 of even number columns without rocking the other, but only the selection claw 251 of the odd number columns rotates in the direction of the arrow mark (e), because the selection claw 252 of the even number columns is removed from the locus by a selective claw control shaft 29. Then, the head section 253 of the selection claw 251 is disengaged from the head 242 of the type ring claw 24, and the type ring shaft 23 and type ring 21 rotate as one body with the protrusion 241 of the type ring claw 24 and the groove 231 of the type ring shaft 23 engaged. Each column of odd number columns makes the same movement, and when the type ring shaft makes almost one rotation the selection of odd number column is finished.