Security door with internally-mounted padlock

Abstract

The invention relates to a security door with an internally-mounted padlock. Forked door bolts are respectively arranged on the upper side, the lower side as well as the left side and the right side of an inner cavity of a door leaf; a straight bar of each forked door bolt is sleeved with an offsetting spring, and is sleeved in a guide bearing seat in a penetration mode; two pins of each forked door bolt are sleeved in side wall bolt hole of the door leaf respectively in a penetration mode; a rotary plate bracket is arranged at the left-of-center position of the door leaf; one end of a connecting bar is articulated with a straight bar of each forked door bolt, and the other end of the connecting bar is articulated with a rotary plate; a rotary handle is fastened on the outer end of a central shaft of the rotary plate penetrating through a bracket panel; the end part of the rotary handle is provided with a lock hole for hanging of a padlock; the middle part of the right side of the bracket panel is fixedly provided with a baffle ring matched with the lock hole; the middle part of the rotary handle is provided with a movable pin, and a clamping hole matched with the movable pin is arranged on the bracket panel; and the upper-center position of the door leaf is provided with an arm access hole. The security door with the internally-mounted padlock not only can prevent a door from being opened by a stealer with a technical unlocking method, but also has a simple structure and is low in manufacture cost, and is beneficial to popularization and application.

Description

technical field [0001] The invention relates to an accessory device of a building, especially an access control device for personnel entering and exiting. Background technique [0002] The security of an anti-theft door depends on the performance of the door lock it uses. Although the existing various mechanical door locks are simple in structure, sturdy and durable, low in manufacturing cost, and easy to install, their anti-theft performance is poor, and their lock cylinders are easy to be twisted by thieves with technical unlocking methods, thereby easily opening the door. That is to say, the anti-theft door using the mechanical door lock has no safety at all. It can only prevent gentlemen, but not villains. [0003] In recent years, some anti-theft doors use electronic password door locks or electronic door locks that can recognize fingerprints and pupils. Although they can effectively prevent thieves from using technical unlocking methods to open the door, the manufactu...

AI Technical Summary

Problems solved by technology

Although the various existing mechanical door locks are simple in structure, sturdy and durable, low in manufacturing cost, and easy to install, they have poor anti-theft performance.

In other words, the anti-theft door using the mechanical door lock is no longer safe at all. It can only prevent gentlemen, not villains.

[0003] In recent years, some anti-theft doors use electronic password door locks or electronic door

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