PURPOSE: To permit the use of a lock for a door and a trunk lid by a method in which door locking and trunk lid unlocking are made possible by command signals from one radio transmitter and the receivable range for trunk lid is set up narrowly.
CONSTITUTION: From one radio transmitter, a command signal for unlocking door lock and a command signal for unlocking trunk lid are sent out in the same intrinsic signal. The signal as unlocking command signal for door lock is received by a sensor 6 for door and also as unlocking command signal for trunk lid by a sensor 8 for trunk lid. In this case, the receivable region A of the sensor 8 for trunk lid is set up narrower than that B of the sensor 6 by lowering receiving sensibility and also by limiting directional patterns. Both operations can thus be controlled by one transmitter, and unlocking control for door can be made in a wider range and only in a narrow range close to the trunk lid.
IKEDA TOSHIKI
OKADA ATSUNOBU
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