Patent ID: 8816815

Claim:
A lock device for a power supplying plug fitted to and removed from an inlet arranged in a vehicle, wherein the vehicle includes a verification function, which transmits and receives a wireless signal to and from an electronic key and unlocks or permits unlocking of a door, and a plurality of antennas used to transmit wireless signals requesting the electronic key for responses, the lock device comprising: a control unit that restricts an unauthorized removal of the power supplying plug from the inlet and permits an authorized removal of the power supplying plug from the inlet using the verification function; wherein the controller: transmits a first wireless signal that requests the electronic key for a first response related to the permission of the authorized removal of the power supplying plug from a first one of the plurality of antennas, transmits a second wireless signal that requests the electronic key for a second response related to the unlocking or permission of unlocking of the door from a second one of the plurality of antennas, stops transmitting the first wireless signal related to the permission of the authorized removal of the power supplying plug from the first one of the plurality of antennas when the second wireless signal related to the unlocking of the door is transmitted from the second one of the plurality of antennas in a state in which the vehicle is parked, and stops transmitting the second wireless signal related to the unlocking or permission of unlocking of the door when the first wireless signal related to the permission of the authorized removal of the power supplying plug is transmitted.