A mechanical linkage secondary lock

Abstract

The invention discloses an auxiliary mechanical linkage lock. The auxiliary mechanical linkage lock comprises a lock case, an upper pull rod, a lower pull rod, a pull rod driving mechanism and a pull rod fixing mechanism. The upper pull rod is connected with an upper bolt, the lower pull rod is connected with a lower bolt, the upper pull rod and the lower pull rod are connected through a gear and rack transmission assembly, and a cavity used for containing a latch of a main lock is formed between the upper pull rod and the lower pull rod. The pull rod driving mechanism is used for driving the upper pull rod and the lower pull rod to be simultaneously opened or closed in the longitudinal direction, and the pull rod fixing mechanism is used for fixing the opened upper pull rod and the opened lower pull rod. The pull rod driving mechanism comprises a driving wheel driven block, a driving wheel piece, a driving wheel and a first driving gear, wherein the driving wheel driven block, the driving wheel piece, the driving wheel and the first driving gear are coaxially arranged. The pull rod fixing mechanism comprises a fixing bolt, a second driving gear, a first cushion block, a bolt connecting piece, a first metal plate, a second metal plate and a bolt rack, wherein the first metal plate, the second metal plate and the bolt rack are fixed to the bottom surface of the bolt connecting piece. The auxiliary mechanical linkage lock is good in safety and anti-theft performance, has an automatic locking function and can improve the safety and anti-theft performance of an interior door when used in cooperation with the main lock installed on the interior door.

Description

technical field [0001] The invention relates to a mechanical lock, in particular to a mechanical linkage auxiliary lock. Background technique [0002] Existing mechanical locks are generally used in anti-theft doors, and most of them are installed uniformly by developers. Class A locks with low safety performance are usually mainstream products, and there are certain deficiencies in safety. Technical unlocking theft is a new type of theft. The criminal suspect uses professional technical unlocking tools to open the lock of the anti-theft door in a short time, burglary, and the lock of the anti-theft door is still intact after being stolen. Along with the improvement of people's living standard, the requirement for the security of interior door (comprising the balcony door of villa, private courtyard and courtyard door etc.) has also been improved gradually. Indoor doors generally include active doors and passive doors. The main lock is installed on the active door, and the ...

AI Technical Summary

Problems solved by technology

However, the lock structure of the existing indoor doors is usually relatively simple, and the active and passive doors are often only connected by a lock plate, which has poor security and anti-theft performance, and it is necessary to manually pull the lock bolts on the top and bottom of the passive door. Fix the passive door on the door frame, and the lock bolt must be pulled back before the secondary lock is unlocked, which is inconvenient to operate

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