Mechanical safe-guard chain door lock provided with password remote control device

Abstract

The invention discloses a mechanical safe-guard chain door lock provided with a password remote control device, which comprises original lock body structures such as a lock body shell, a lock core, a main bolt, a flush bolt, an auxiliary bolt, a small bolt and the like; and the password remote control device and a lock bolt limit device controlled by the remote device are arranged in a lock body. The mechanical safe-guard chain door lock is characterized in that the lock bolt limit device is arranged at the bottom of a bottom pull rod which is in linkage with the main bolt and the flush bolt; the lock bolt limit device is connected on an expansion link of the remote device and is formed by a slide block which leans against the lock body shell and slides along the bottom of the shell; when the slide lock is in lockup state, one side of the slide lock leans against the lock body shell, and the other side of the slide lock can obstruct at the bottom end of the pull rod. Compared with the prior art, the mechanical safe-guard chain door lock provided by the invention comprises the following advantages: 1. the structure is simple and reliable, and the failure rate is low; 2. security is high, and the unlocking can not be realized by opening or destroying the lock core only through technical means; 3. a main structure of a lock body is not changed, original unlocking method is not changed, the manufacturing cost is low, and the application is convenient; and 4. the maintenance is convenient, and the beauty is not influenced.

Description

technical field [0001] The invention relates to a mechanical anti-theft door lock equipped with a password remote control device. Background technique [0002] At present, ordinary mechanical anti-theft door locks are generally provided with a main bolt, a sky and earth bolt, a secondary bolt and a small bolt, and the main bolt and the sky and earth bolt are linked. When the user goes out for a short time, he only needs to pull or turn the auxiliary lock bolt to open the door, and then close the door after going out, and the auxiliary lock bolt will automatically lock. The small bolt is a mechanism that prevents people from opening the anti-theft door outdoors when the user is at home. When the user needs to unscrew the small bolt, it can effectively prevent the anti-theft door from being opened outdoors by technical means. When the user goes out for a long time, he generally turns the anti-theft door lock with a key after closing the door, and partially or completely unscr...

AI Technical Summary

Problems solved by technology

The anti-theft door lock has defects such as inconvenient use due to the complicated process of opening and locking the door

At the same time, there are also shortcomings such as complex structure and high cost.

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