Circuit breaker and operating mechanism thereof

An operating mechanism of a circuit breaker, comprising a mechanism bracket, a jump buckle, a lock buckle, a rocker arm assembly, an energy storage spring, a first crank, and a first connecting rod assembly, wherein the jump buckle, the lock buckle and the rocker arm assembly are pivotally disposed on the mechanism bracket respectively;

• the lock buckle is in locking fit with the jump buckle;
• one end of the first crank is rotatably connected to the jump buckle, and an other end of the first crank is connected to the first connecting rod assembly through a fifth shaft;
• one end of the energy storage spring is connected to the fifth shaft, and an other end of the energy storage spring is rotatably connected to the rocker arm assembly;
• the operating mechanism further comprises a second connecting rod assembly;
• the second connecting rod assembly comprises a second crank pivotally disposed around a tenth axis, a third connecting rod, and a third crank pivotally disposed around an eleventh axis;
• the second crank is also rotatably connected to the third connecting rod through an eighth shaft;
• the third connecting rod is also rotatably connected to the third crank through a ninth shaft;
• the first connecting rod assembly is also rotatably connected to the second crank through a seventh shaft;
• the tenth axis, an axis of the eighth shaft, an axis of the ninth shaft and the eleventh axis are spaced in parallel;
• an axis of the seventh shaft and the tenth axis are spaced in parallel;
• the tenth axis coincides with a rotation axis of a moving contact mechanism of the circuit breaker, and the eighth shaft is in driving connection to the moving contact mechanism to drive the moving contact mechanism to rotate;
• or the eleventh axis coincides with the rotation axis of the moving contact mechanism, and the ninth shaft is in driving connection to the moving contact mechanism to drive the moving contact mechanism to rotate.