| 摘要 |
PURPOSE:To improve a function in printing quality, to get rid of a replacement due to the breaking of a type belt, and to decrease process for manual repair, by providing a back-up frame for preventing a type belt travelling along an arrangement direction of a plurality of type faces from rising. CONSTITUTION:A current flows to a coil 1, while a core 2 is magnetized. An actuator lever 3 is attracted in an attraction direction (a) by the actuation of magnetic force. The actuator lever 3 makes a tail cap 4 act in an actuating direction (b). A print hammer 9 files and collides with a type face 11 of a type belt 10 via a printing paper 7 and an ink ribbon 8 to carry out printing. The type belt 10 is equipped to a drive pulley 15 and an idler pulley 16. The driving force of a motor 17 is transmitted to the drive pulley 15 and the type belt 10 travels in a travelling direction (c). The type belt 10 is prevented from rising by providing a knocking against an abutting part 14 in a back up frame 12, and the type face 11 and the face of the print hammer 9 are made to agree with each other by their facial collision. Further, the cause of a breaking accident due to wear or the like is removed by decreasing a contact part of the type belt 10 by providing a stepped part 18.
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