Internal locking mechanism for anti-theft door production

By designing a locking mechanism and a reinforcing mechanism in the security door, and utilizing the unidirectional rotation of the ratchet and pawl and the cooperation of the locking bar and the slot, the problem of the security door being easily opened by external locks is solved, achieving multiple protections and enhancing the security and service life of the security door.

CN224282419UActive Publication Date: 2026-05-26HENAN JINGANG DOOR IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HENAN JINGANG DOOR IND CO LTD
Filing Date
2025-07-08
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing security doors are easily opened from the outside locks and offer poor protection against forced entry, threatening people's property and personal safety.

Method used

An internal locking mechanism for the production of security doors has been designed, including a locking mechanism and a reinforcing mechanism. The unidirectional rotation design of the ratchet and pawl enables the lock pin to be accurately embedded in the slot. Combined with the cooperation of the lock bar and the slot, a multi-protection system is formed to enhance the anti-pry and anti-impact performance.

Benefits of technology

It significantly improves the anti-pry and anti-impact performance of security doors, ensuring that the door is difficult to pry open, extending the service life of the device, reducing maintenance costs, and possessing good practicality and reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the related technical field of anti-theft door production, in particular to an internal locking mechanism for anti-theft door production, which comprises a door frame, and a clamping and locking mechanism is arranged on the surface of a door body. According to the internal locking mechanism for anti-theft door production, through the arrangement of the clamping lock mechanism, after a door body and a door frame are closed firstly, a door lock is in a locked state, then a rotating block is rotated, one end of the rotating block penetrates through a connecting block to drive a ratchet wheel and a disc to rotate synchronously, one end of a pawl on the surface of a limiting rod is matched with the ratchet wheel, and springs are annularly distributed at equal intervals; when the disc rotates, a second connecting rod connected with the surface of the disc drives the adjusting rod to move, one end of the second connecting rod penetrates through the adjusting rod and transmits the movement to a lock column connected with the first connecting rod, and one end of the lock column is embedded in the limiting hole and moves along the limiting hole in a guiding mode. Locking is completed until the end with the matched size is embedded into the first clamping groove in the surface of the door frame.
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