| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a car alarm apparatus capable of reliably raising an alarm even during the theft at low cost in a space-saving manner. <P>SOLUTION: In the car alarm apparatus, a low horn 41 is connected to a power source 10 via a first relay circuit 31 in which a contact is closed when a horn switch 60 is operated, and a first fuse 21, a security horn 42 arranged at a place inaccessibly from the outside of the car is connected to the power source 10 via a second relay circuit 32 in which a first contact 32b and a second contact 32c are changeable when occurrence of any theft is detected, and a second fuse 22, and the first contact 32b is closed when the horn switch 60 is operated. Then, the security horn 42 is connected to the power source 10 via the first relay circuit 31 and the first fuse 21, and when occurrence of any theft is detected, the second contact 32c is closed to connect the security horn 42 to the power source 10 via the second fuse 22. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
