| 摘要 |
PURPOSE:To enable highly precise registration between a thermal head and platen roller by simple constitution having few number of parts. CONSTITUTION:A bearing 5 of a platen roller 4 is fitted to a pair of U-shaped notch parts 3 formed in both side side plates 1 and the rear of a radiation plate 6 provided with a thermal head is pressed by a leaf spring 8. When a platen roller 4 is turned, the radiation plate 6 is moved, the top and the vicinity of the lower end part of the radiation plate 6 abut respectively against an U-shaped fringe part 9 and protrusion 10 of positioning reference part and the thermal head is positioned precisely with a shaft center of a platen roller 4 at a fixed positional relation. |
