| 摘要 |
PURPOSE:To prevent a burglary by connecting a key having a primary coil and a lock having secondary coils magnetically so as to detect a data set to the key, and prohibiting the starting of engine when the detected data is more than a preset data. CONSTITUTION:A primary coil 11 wound on a shaft form core 8 of a key 2 is connected to an IC resonance coil which consists of a coil L1 and a capacitor C1 built in the key 2, and secondary coils 12 and 13 are wound on the circular core 7 of a lock 1. When the key 2 is inserted to the lock 1, the shaft form core 8 is contacted to the circular core 7, the coil 1 and the coils 12 and 13 are connected magnetically, and a mutual induction connecting circuit 14 is formed. A data set to the key 2 is detected by a data detecting means, and when the detected data amount is more than a preset data amount, it is decided to be a burglary condition, and the engine starting is prohibited by a control circuit 20. In such a way, a burglary to start the engine improperly can be prevented. |
