Silent mortise lock

Abstract

Disclosed is a silent mortise lock. The silent mortise lock comprises a fixing plate and an upper cover plate. The side edge of the fixing plate is provided with a stopping plate with a spring bolt hole; the inside of the fixing plate is provided with an inclined spring bolt limit rack, an inclined spring bolt stopping plate, a lock rudder, an inclined spring bolt, a square spring bolt and an interlock rod, wherein the inclined spring bolt, the square spring bolt and the interlock rod are in linkage with the lock rudder; the tail end of the inclined spring bolt is provided with a slide bar, which can slide on the inclined spring bolt limit rack and the inclined spring bolt stopping plate in a penetrating mode, and the slide bar between the inclined spring bolt and the inclined spring bolt stopping plate is provided with a front pushing spring which keeps the inclined spring bolt in a spring-out state all the time. The silent mortise lock is characterized in that the tail end of the slide bar is provided with an upper limit sheet and a lower limit sheet; a poke rod fixed onto the lock rudder is arranged between two limit rods; the lock rudder is provided with a buffering hydraulic cylinder for buffer the rotating speed of the lock rudder. The silent mortise lock has the advantages of, by buffering the rotating speed of the lock rudder through the buffering hydraulic cylinder on the lock rudder, avoiding the impact noise due to rapid rebound and reset of a door opening handle and the inclined spring bolt, and meanwhile, being noiseless, reducing wearing, prolonging the service life and the like.

Description

technical field [0001] The invention relates to a mortise lock, in particular to a silent mortise lock which can prevent the door opening handle from making noise when it rebounds. Background technique [0002] The lock is one of the important accessories of the anti-theft door, and the performance of the lock is directly related to the safety and performance of the anti-theft door. At present, there are many kinds of anti-theft door locks used on the market, with different characteristics and ever-changing models. The basic structure is basically the same, generally including a lock body, a lock cylinder, and a lock tongue. The main means of going out (locking) and retracting (unlocking), while the automatic lock does not require human operation when locking, so that it automatically locks when the door is closed, reducing the cumbersome operations when locking, and is extremely convenient to use , so it has been welcomed by consumers after being put on the market. Howeve...

AI Technical Summary

Problems solved by technology

However, this type of lockset also has its shortcomings: one is that the product structure is complex, there are many faults, and the service life is short

The second is that when turning the handle to unlock and let go to close the door, some components of the door lock, such as the handle, the oblique lock house, etc., are quickly reset under the action of the return spring. Working and living, rapid impact at the same time leads to rapid wear and tear, which seriously affects the grade and service life of the lock

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