| 摘要 |
PROBLEM TO BE SOLVED: To efficiently assemble an intermittent feeding mechanism, by suppressing positional variation of front end of a pawl section. SOLUTION: A heart cam balancer 14 is attached to the chronograph second hand shaft 2 of a chronograph wheel 1 and a chronograph wheel finger 15 is attached to the balancer 14. At the end section of the ratchet 15, a pawl section 152 which is engaged with the gear of a minute chronograph intermediate wheel is provided and a projecting section 153 which is used for positioning is provided to the pawl section 152. On the other hand, a hole section 141 used for positioning is bored through the blancer 14. At the time of assembling an intermittent feeding mechanism, the projecting section 153 of the pawl section 152 is inserted into the hole section 141 of the balancer 14, and positioning is performed by pressing the projecting section 153 against the bank of the hole section 141 of the balancer 14 with the force of a spring section 151. |
