| 摘要 |
PROBLEM TO BE SOLVED: To produce an anti-shock transmission with a simple and cheap constitution which can avoid the damage of a spring or its attachments without using a friction regulator when a certain shock is received. SOLUTION: A transmission which is inserted between a rotating vibration bob and a very small generator for driving a generator rotor from the vibration bob by increasing the rotation velocity is disclosed. The intermediate gears and pinions of the transmission include a barrel (27) and a middle axis (24) is connected with a drum (41) by a spiral spring (30). The inner end of the spring has a bent part (34), which links with one of hollow parts (51) of the middle axis owing to elasticity. When the torque working in a specific rotation direction by the middle axis becomes excess, it can be released by sliding an inclined side (52). With this constitution, damage by a shock especially in a watch is prevented without using a friction system. |
