| 摘要 |
A combination lock comprises a tubular locking case (3) defining an axis and a free opening at one end; a sliding bolt (12) located coaxially and displaceably in the locking case and extending out of the opening of the locking case and provided with a longitudinal key slot (16) and a number of circumferential grooves (15); a number of code discs (7) located rotatably in the locking cases and each having a central opening (9), through which the sliding bolt is extending, and a dowel (10) extending into the central opening and fitting into the grooves and key slot of the sliding bolt; an actuator (18) located coaxially and rotatably in the locking case and arranged to turn the code discs in succession and extending out of the opening of the locking case with an outer part (20) provided with a dial; and catch pins (11) located on the code discs in such a way that they cooperatively align the dowels I the key slot of the sliding bolt when the actuator is turned successively in relation to a mark on the locking case to ciphers corresponding to a specific code. The combination lock furthermore comprises a bolt (26) extending displaceably through the locking case, and a gear segment (24) functioning between the bolt and the sliding bolt to make the two parts displace themselves simultaneously on activation of the combination lock obtains a simple, inexpensive design that con be mounted quickly, easily and safely in e.g. a door. The combination lock furthermore offers a great security in case of fire than a lock with keys. If a person behind a locked escape door with a key lock operated from both sides with a key has not found or cannot find the key in the hurry, or this key is in a place that is inaccessible due to the fire, this person would be unable to unlock the lock and get out at the consequent danger of dying in the fire.
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