Patent ID: 9431185
Filing Date: 2016-08-30
CPC Classification: H01H

Claim Text:
1. A spring operation device for use in a switchgear, comprising: a main shaft that is rotatably supported by a casing; an output lever that is fixed to the main shaft, is rotatable about the main axis, and is coupled to a switching contact; an opening biasing unit that biases the output lever so as to rotate the output lever in a predetermined direction; a four-joint link that a guide that a tripping latch that is rotatably supported by the casing and is capable of locking the guide; a tripping trigger that is rotatably supported by the casing and is capable of locking the tripping latch; a tripping electromagnet that a switch-on lever that is fixed to the main shaft and is rotatable about the main shaft; a closing bias unit that biases the switch-on lever so as to rotate the switch-on lever in a reverse direction to the predetermined direction; a switch-on latch that is rotatably supported by the casing and is capable of locking the switch-on lever; a switch-on trigger that is rotatably supported by the casing and is capable of locking the switch-on latch; a switch-on electromagnet that an opening-operation prevention unit that includes a closing-operation prevention unit that includes the other end of the interlock bar,