the winding gear 61 the front ends of the teeth 66a push the hook 65 on the carriage downwardly keeping the carriage 5 angled back so that the thermal head 4 is away from the platen 1 the rack 66 disengages from the winding gear 61 in this head up state therefore when the carriage 5 reciprocates the bobbin 64 will not turn and the print tape will not advance fig3 5 show the other condition in which the head is down to move from the head up state to the head down state the cam 72 is rotated in a clockwise direction as viewed in fig1 4 the pin 71 moves along the groove 73 in the cam and slowly moves away from the center of rotation of the cam 72 this rotates the driving plate 68 about the shaft 60 in a clockwise direction the winding rack 66 is urged to rotate in a clockwise direction by being pulled by the tension spring 70 then the rack teeth 66a move away from the hook 65 and come into mesh with the teeth of the winding gear 61 simultaneously the upper surface of the rack 66 bears against the protrusion 76 formed on the bottom of the carriage 5 as the cam 72 turns further the driving plate 68 and the winding rack 66 further rotate clockwise rotating the carriage 5 toward the.