Operating mechanism of circuit breaker and assembling breaker

An operating mechanism of a circuit breaker, comprising a bracket, a rocker arm assembly and a jump buckle pivotally disposed on the bracket respectively, a first crank pivotally disposed on the jump buckle around a first axis, and a first spring, one end of the first spring is rotatably connected to the rocker arm assembly through a first spring shaft, and another end of the first spring is rotatably connected to the first crank through a second spring shaft;

• one end of the jump buckle is rotatably connected to the bracket and is a jump buckle pivoting end;
• wherein the jump buckle comprises a jump buckle hole for a positioning pin shaft to be inserted, and the bracket comprises a bracket hole for the positioning pin shaft to be inserted;
• the jump buckle hole is aligned with the bracket hole;
• the first spring shaft is in limiting fit with the jump buckle;
• and one end of the first crank swings in a direction away from the jump buckle pivoting end, such that a spacing between the first spring shaft and the second spring shaft is smaller than or equal to a length of the first spring, and a first assembly state is formed.