| 摘要 |
PURPOSE:To maintain high-quality printed pictures by providing a drive force transmission mechanism capable of regulating winding torque to a rotary shaft. CONSTITUTION:When a carriage 7 is moved to the right, a gear 24 engaged with the rack hear 6A of a guide bar 6 is turned, and a gear 15 is turned by an idle gear 23. A winder 18 integrated with the gear 15 held by a coil spring 17 and a friction plate 14 is operated to turn a winding core 22. The gear 15 movable in the upward axial direction of the plate 14 is pressed on the plate 14 by the spring 17, a washer 16 and the spring 17 are fitted on a winding shaft 13, and a male screw is formed above the shaft 13. The winder 18 is screwed to compress the spring 17 to regulate the winder 18 to a given rotation torque vertically by screwing. Since given rotation torques are set up and fixed. The feeding ink ribbon by given torque can thus be allowed, and high-quality printed pictures can be always maintained. |
