DRIVING TRANSMISSION MECHANISM

摘要

PURPOSE:To make a transmission mechanism compact by using a spring clutch for taking out only one directional torque from a reversible driving system. CONSTITUTION:A ratchet 12 is fixed to a platen roller 1, and a spring clutch 14 is mounted on a center shaft 13. A control clow 15 detachably supported on a supporting shaft 15a is disengageably arranged opposite to said ratchet 12. A control solenoid 17 is attracted to cause said control claw 15 to disengage from the ratchet 12 for transmitting shaft torque to a gear train 4 through the spring 14a of the spring clutch 14. Thus, a motor can be disused for taking out only one directional torque to make a transmission mechanism compact.