| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an alarm system for locks that can protect an alarm against breakage so that it works even if the locks are broken, is free from restrictions on its operating time and sound volume, and keeps the size of the locks intact. SOLUTION: A lock device 1 to be set on a wheel includes a sensor 20 for detecting variations within the lock device 1, and a transmitter 15 for sending out detection results by the sensor 20. A vehicle body 23 is equipped with a receiver 24 for receiving detection signals from the transmitter 15, an alarm 4 for raising alarm sounds, and a controller 25 for actuating the alarm 4 according to the output of the receiver 24. The controller 25 and alarm 4 are powered by an on-vehicle battery 7.</p> |
