| 摘要 |
<p>A locking device 1 has a locking member (e.g. a locking bar / bolt) 201a arranged to move between a locked and unlocked position and a shield 21 which serves to prevent an external magnetic field from influencing movement of the locking member. Ideally the locking device is provided to lock a steering wheel of a vehicle, the locking device preferably being key operated K and comprising a rotor 112 and tumblers. The magnetic shield / shroud 21 protects the locking bolt by dispersing and redistributing the magnetic field. Preferably the shield/ guard is made of a magnetic metal material, e.g. steel. As such, a thief attacking the lock with a magnet will not be successful in unlocking the vehicle. An independent claim relates to a steering locking device wherein a shield intersects and blocks an extended line of the locking bar movement direction. (This prevents a direct axial line between a magnet and the locking bar.)</p> |
