| 摘要 |
The present invention relates to the technical field of coded locks, in particular to a fixed coded lock. The fixed coded lock comprises a casing, a latch hook return device that is used to push the front end portion of a latch hook into the casing is arranged inside the casing; the middle portion of the latch hook return device is hinged to the casing, and the latch hook return device respectively extends to form a pushing portion and a pressing portion respectively from the hinge point; the pushing portion pushes against the latch hook, and the pressing portion extends outside the casing; the front end portion of the latch hook is withdrawn into the casing through the latch hook return device which is manufactured by applying the lever principle, and the latch hook is withdrawn into the casing by pressing a key, so that unlocking becomes easier and more labor-saving for users.
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