| 摘要 |
<p>PURPOSE:To certainly inform a user who stands far from a car of the theft for the car by driving a transmission means when a judging means judges the presence of an intruder and allowing a receiving means to receive the transmission output. CONSTITUTION:When a user turns-ON a theft preventing control switch 7 and opens a door, a door switch 4 is turned-ON, and during the time when a condenser 4 is charged, a transistor 15 is turned-ON in a logic circuit 8, and the output of the logic circuit 16 becomes that at H level, and a transmission circuit 19 is driven through a switching circuit 17. Then, a signal having a prescribed frequency is sent out from the transmission circuit 19, and said signal is sent out from an antenna 23 through a receiving and transmission selecting part 22 which is set to the transmission side. When an intruder opens the door in closed state, the door switch 4 is turned-ON, and the transmission circuit 19 is driven, and a receiver receives the output signal to inform of the theft for the car.</p> |
