Patent ID: 7336151

Claim:
A wireless locking/unlocking device for a vehicle comprising: a vehicle side transmitter for sending a request signal to at least a predetermined zone in a vehicle compartment; a wireless portable unit for sending a response signal in response to the request signal; a vehicle side receiver for receiving the response signal; a position detector for detecting the position of the portable unit depending on whether or not the response signal received by the vehicle side receiver coincides with ID information stored in the vehicle; a controller for outputting a locking signal based on a detection result of the position detector; and an actuator for bringing a door lock mechanism into a locking state in response to the locking signal; an all-door closing detector which detects that all the doors of the vehicle are closed after a condition that at least one door is open and generates an all-door closing detecting signal, wherein the vehicle side transmitter sends the request signal in response to the all-door closing detecting signal and if it is detected that the portable unit exists within the vehicle compartment by the position detector, stops sending of sequent request signals, and if it is detected that the portable unit exists within the vehicle compartment by the position detector, the controller prohibits an output of the locking signal; a second vehicle side transmitter for, after the position of the portable unit is detected by the position detector based on the request signal, sending the request signal to the predetermined zones within the vehicle compartment and around the vehicle; and a second position detector for detecting the position of the portable unit depending on whether or not the response signal in response to the request signal sent by the second vehicle side transmitter coincides with ID information inherent of the vehicle, wherein the second vehicle side transmitter, if it is detected that the portable unit does not exist within the vehicle compartment by the position detector, sends the request signal to the predetermined zones within the vehicle compartment and around the vehicle intermittently, and wherein the controller, if it is detected that the portable unit does not exist at least outside the vehicle by the second position detector when it is detected that the portable unit does not exist within the vehicle compartment by the position detector, outputs the locking signal.