| 摘要 |
An automatic anti-theft device or lock is secured to a support of a portable apparatus to secure the apparatus against theft. The lock has two mating halves secured together to form a shatter-proof casing. One casing half includes a hollow spindle integral with the inside wall of the casing half, a retractile reel mounted on the spindle with a cable secured at one end thereto and wrapped around the reel. The second free end of the cable extends through one wall of the casing. The second casing half mounts a lock mechanism having a rotatable lock member which extends into the spindle when the casing halves are joined. The free end of the cable includes a lock cylinder which aligns with the rotatable lock member when it is inserted into the first casing half, and is secured by the rotatable lock member. The first casing member includes a slidable latch which is spring-biased to a first position to engage and latch the reel against rotation. The latch may be moved against the spring bias when the free end of the cable is not engaged in the casing to allow the reel to move and the cable to be extended or retracted. When the cable is at the desired extended position, the latch is released to secure the reel and the lock cylinder is inserted into the casing which prevents the latch from being moved from the first position. The cable is secured around some immovable object before it is inserted into the casing.
|
