Connector and power supply circuit cut-off device

A power supply circuit cut-off device comprising a connector comprising:

• a first connector housing;
• a second connector housing configured to be fitted to and detached from the first connector housing;
• a first terminal provided in the first connector housing, the first terminal comprising a pair of terminal plate portions with a plate portion provided between the pair of terminal plate portions, the plate portion having an electrical insulation property;
• and
• a second terminal provided in the second connector housing, the second terminal having a U shape, the second terminal comprising contact pieces facing each other with a gap between the contact pieces, the gap being larger than a width dimension of the first terminal, the first terminal being configured to be inserted into the gap when the second connector housing is fitted to the first connector housing, the first terminal being configured to be removed from the gap when the second connector housing is detached from the first connector housing,
• wherein the second connector housing comprises a pair of pressing plate portions extending toward a direction in which the second connector housing is fitted to the first connector housing,
• wherein the second terminal is configured to be accommodated between the pressing plate portions, the second terminal being configured to be displaceable between a first position and a second position, a part of the contact pieces being configured to extend beyond distal ends of the pressing plate portions when the second terminal is in the first position, the part of the contact pieces being configured to be completely retracted into a space between the pressing plate portions such that the part of the contact pieces do not extend beyond the distal ends of the pressing plate portions when the second terminal is in the second position,
• wherein the second terminal is configured to be displaced from the first position to the second position by the second terminal being retracted into the space between the pressing plate portions when the second connector housing is completely fitted to the first connector housing, the contact pieces being configured to be pushed toward the first terminal by the pressing plate portions such that the contact pieces contact the terminal plate portions, and
• wherein the first terminal and the second terminal are configured to function as a switch unit, the switch unit being configured to turn on and off a power supply circuit.