Closed mechanical anti-theft door lock

Abstract

The invention discloses a closed mechanical anti-theft door lock. The closed mechanical anti-theft door lock comprises a closed anti-theft cap, a lock body and a door lock key; the closed anti-theft cap comprises three pipe openings, a cover plate and a base plate; the lock body comprises two door lock pin fixing blocks, a crankshaft casing, a gasket, a crank, a crank socket, a door lock pin, a spring and a spring fixing block; the two door lock pin fixing blocks are fixed on the inner surface of a door; the door lock pin is inserted into the two door lock pin fixing blocks and can linearly slide in the two door lock pin fixing blocks; the key comprises a tooth base cylinder, an inner ejector pin, a handle and an extensible pin. According to the closed mechanical anti-theft door lock, the door lock is convenient to open and close, the lock-picking theft of the non-working personnel can be prevented, the performance is reliable, the anti-theft performance is good, the door lock is difficult to pry up, the opening is convenient, the door lock key is difficult to be copied, and the like.

Description

technical field [0001] The invention relates to a closed mechanical anti-theft door lock. Background technique [0002] Existing large-scale and other facility door locks use ordinary anti-theft door locks, such as field facilities that cannot be accessed or maintained frequently, the door locks are easily aging, the anti-theft performance is poor, the tools used for the anti-theft door locks are heavy, and the opening and closing operations are complicated. In addition, possible thefts that may occur between duty intervals or when there is no one at night (such as the theft incidents of Luohe and Pingxu large spanning towers in Huainan area in recent years), will lead to damage and loss of equipment and affect the safe operation of power facilities. Reduce and eliminate safety accidents caused by human factors. [0003] Therefore, wish to obtain a kind of good mechanical door lock of anti-theft performance. Contents of the invention [0004] The purpose of the present i...

AI Technical Summary

Problems solved by technology

[0002] Existing large-scale and other facility door locks use ordinary anti-theft door locks, such as field facilities that cannot be accessed or maintained frequently, the door locks are prone to aging, the anti-theft performance is poor, the tools used for the anti-theft door locks are heavy, and the opening and closing operations are complicated. In addition, thefts that may occur between duty intervals or when there is no one at night (such as the theft incidents of Luohe and Pingxu large spanning towers in Huainan area in recent years), will lead to damage and loss of equipment and affect the safe operation of power facilities. Reduce and eliminate safety accidents caused by human factors

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