Mechanical password door lock anti-theft device

Abstract

The invention discloses a mechanical password type door lock burglar alarm. The mechanical password type door lock burglar alarm comprises a box body (1), a plurality of transcoding wheels (4) are arranged on a transcoding wheel shaft (3) at the upper portion of the interior of the box body at intervals, figure 0 to figure 9 are sequentially arranged on the outer side faces of the transcoding wheels, first gears are arranged on the end faces of the transcoding wheels, and limiting wheels (8) fixed to a limiting wheel shaft (7) are arranged at the lower positions corresponding to the transcoding wheels; notches (9) are formed below the limiting wheels, third gears are arranged on the end faces of the limiting wheels, and dialing wheels (5) fixed to a dialing rotating shaft (6) are arranged between the transcoding wheels and the limiting wheels; and second gears are arranged on the end faces of the dialing wheels, a guide rail plate (12) is arranged in the box body and provided with a left stretchable block and a right stretchable block, and the left stretchable block and the right stretchable block are provided with protruding blocks (21) corresponding to the notches. The mechanical password type door lock burglar alarm adopting a sealed lock cylinder with passwords is compact in structure, brings convenience to door opening and closing operation, and is relatively low in price and high in safety and reliability.

Description

technical field [0001] The invention relates to a door lock, in particular to a mechanical password type door lock anti-theft device. Background technique [0002] There are many types of door locks, and the requirements for door locks are different in various occasions. Combination locks, fingerprint locks and glass locks are used in some high-end places, confidential institutions, office buildings, hotels and other high-end places. They are very safe, but the prices are relatively expensive, and they are not suitable for ordinary people's families and general places. The anti-theft door locks commonly used in ordinary families belong to mechanical locks, which have higher security and are cheaper in price. However, due to the relatively simple structure of mechanical locks, the lock cylinder is exposed outside, and criminals can use them without keys and without damaging the door locks. Some special tools can be inserted into the lock cylinder to realize unlocking, enter ...

AI Technical Summary

Problems solved by technology

Combination locks, fingerprint locks and glass locks are used in some high-end places, confidential institutions, office buildings, hotels and other high-end places. They are very safe, but the prices are relatively expensive, and they are not suitable for ordinary people's families and general places. The anti-theft door locks commonly used in ordinary families belong to mechanical locks, which have higher security and are cheaper in price. However, due to the relatively simple structure of mechanical locks, the lock cylinder is exposed outside, and criminals can use them without keys and without damaging the door locks. Some special tools can be inserted into the lock cylinder to unlock, enter the room for theft, and cause people's property loss and even personal injury

Furthermore, someone will intentionally insert some flaky or needle-like substances into the lock cylinder of the door lock, destroy the lock cylinder, and make the door lock unable to be opened, causing trouble and loss to people.

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