PURPOSE: To permit the operation of a crime-preventing device, illumination, and supply or stoppage of power to household electric apparatus when a house is locked only when no other residents are in house by a method in which a single locking mode and a lock signal sending mode are provided in combination.
CONSTITUTION: Unlocking mode A, locking mode B, and lock signal sending mode C are freely selected in the operating section 17 of a locking device 10. When other residents are in the house during go-out period, the mode B is selected for single locking. Also, when no other resident is at home, the mode C is selected to send out a locking signal. On the basis of the locking signal, when a crime-preventing device begins to operate, the supply of power to given household electric apparatus and illumination in rooms are stopped.
MINAMI TAKAYUKI