Tripping structure of molded case circuit breaker

The utility model discloses a release structure of a molded case circuit breaker, which comprises a base and a release mechanism arranged on the base, the release mechanism comprises a fixed base, a rotating piece and a pin shaft connecting the fixed base and the rotating piece, the rotating piece is of a C-shaped bending structure to form a mounting cavity, the pin shaft is further sleeved with a reset torsion spring, and the reset torsion spring is connected with the fixed base and the rotating piece. One end of the reset torsion spring abuts against the fixed base, the other end of the reset torsion spring abuts against the top of the rotating part, the fixed base is further provided with a first groove facilitating positioning of the reset torsion spring, the top of the rotating part is provided with a second groove, one end of the reset torsion spring is arranged in the first groove, and the other end of the reset torsion spring is arranged in the second groove. The first groove is formed in the fixed ba