Power supply circuit disconnection device

A power supply circuit disconnection device comprising:

• a first connector housing;
• a second connector housing fitted to and separated from the first connector housing;
• a lever that is rotatably provided on the second connector housing, applies fitting force and separation force between the second connector housing and the first connector housing by rotation of the lever between a first operation position and a connector fitting operation position, and rotates from the connector fitting operation position to a second operation position;
• a main circuit switch that has main terminals provided individually on the first connector housing and the second connector housing, is turned to an OFF state at the first operation position of the lever, and is turned to an ON state at the connector fitting operation position and second operation position of the lever;
• a signal circuit switch that has signal terminals provided individually on the first connector housing and the lever, is turned to an OFF state at the first operation position and connector fitting operation position of the lever, and is turned to an ON state at the second operation position of the lever;
• a first lock portion that locks the lever at the second operation position;
• a second lock portion that locks the lever at the connector fitting operation position;
• and
• a lock release operation portion capable of releasing, by an operation of the lock release operation portion, a lock state of the second lock portion.