| 摘要 |
This invention relates to a burglarproof device for a vehicle, which is adapted to prevent that the engine for a vehicle is started by unjust means such as a duplicate key, direct connection of electric wires, or the like, whereby the vehicle is stolen. The key cylinder lock (1)is comprised of an outer tubular member (2), and an inner tubular member (5) rotatably provided within the outer tubular member. A normal magnet key (7) having a magnet (G1, G2) is inserted into the inner tubular member (5). In the outer tubular member, there is provided at least one switch member (11) which is turned ON when the normal key is inserted into the inner tubular member. There is provided input signal discrimination means (12) for cutting off output signals to supply elements essential for the operation of an engine for a vehicle in the case of a key except for the normal magnet key using, as information, a power supply signal delivered from the power supply (20) through one or a plurality of switch members (11). In another embodiment, there is provided a central processing unit operative to discriminate between presence and absence of power supply signals respectively delivered from a plurality of switch members provided in the outer tubular member to deliver output signals to supply elements essential for the operation of the engine for vehicle only when the normal magnet key is inserted into the inner tubular member. <IMAGE> |
