| 摘要 |
PURPOSE:To reduce the number of parts, raise the productivity and assembling operability, cut down the cost and lessen noise during the working period of a printer by a method in which the cross section of a carriage shaft is shaped into a polygonal or oblong form and a head is allowed to be vertically driven by the rotation of the carriage shaft. CONSTITUTION:The cross section of a carriage shaft is shaped into an oblong form, and the shape of the carriage shaft insertion hole of a carriage 9 is also of the same as the carriage shaft 10. The carriage shaft 10 is rotatably attached to a chassis 11, and a lever 12 is attached to one end of the carriage shaft 10 and also to a plunger 6. By a coil spring 13, the lever 12 is energized in the opposite direction to the suction direction of the plunger. During the printing period, the lever 12 is pulled down by the coil spring 13, and the carriage shaft 10 fixed to the lever 12 is turned in the direction of arrow A. Since the sectional shape of the carriage shaft 10 is of an oblong form, the carriage 9 is not slided toward the turning direction of the carriage shaft 10, and the printing head 1 is pressed on the recording paper 2 by the carriage 9. |
