High voltage circuit breaker is imitated to long term

The utility model relates to the field of machinary, especially, relate to a high voltage circuit breaker is imitated to long term. Contain the circuit breaker body, the circuit breaker body containsthe axle, and the spring is installed to the axle head, its characterized in that, the axle head is the screw thread, its projecting shaft that is located the axle head, can the screw thread on the projecting shaft installation extended shaft, the institute can install additional spring down on the extended shaft of saying, attach spring of the combined action that the spring ability is adjacent with the two constitution of spring. Beneficial effect: the lid structure makes the spring can attach initiatively, and two springs can combined action, but tired relatively yet to needing to be changed when at first so, and additional spring rotates the installation extended shaft through the projecting shaft, the additional spring of installation on the extended shaft, and the structure of installation can the snap -on,