CN2131929Y - Safety latch lock for door - Google Patents

Abstract

The utility model relates to a safety latch lock for a door. The utility model is characterized in that in the prime ordinary latch lock, a lock housing and a rotating projection which is arranged on the cover plate of the lock housing and pulls draw rods for a lock tongue form symmetrical double convex shapes; however, in the utility model, the rotating projection which forms an asymmetric single convex shape is arranged on the lock housing, and the cover plate of the lock housing is only provided with a connecting plate. The prime two draw rods for a lock tongue, which are of same length, are changed to a long draw rod for a lock tongue and a short draw rod for a lock tongue, and the long draw rod for a lock tongue is connected with a draw plate. The prime rotating projection which rotates left or rotates right has the function of pulling the lock tongue to retract in the lock housing; however, in the utility model, rotating projection which rotates left (or right) has the function of pulling the lock tongue to retract in the lock housing; when the rotating projection which rotates right (or left), the rotating projection has the function of preventing the lock tongue retracting in the lock housing. The utility model has the advantages of simple structure, easy production and low cost, which are an ordinary latch lock and overcomes the defects that a sheet bar, a screwdriver, etc. are unsafe to lock the lock by means of the clearance between the lock housing and a lock catch, and the door is not inconveniently opened outside with a door when the door is bolted inside.

Description

Safety latch lock for door

The utility model relates to a kind of pin tumbler lock, especially can insure in door or outdoors, has gone up insurance at available key operated simple in structure, safe and reliable safe gate lock with shot outdoors.

At present the common spring door lock is to be made of the rotation projection that the inclined-plane dead bolt in lock housing, snap close and the lock housing, thin stage clip, two isometric dead bolt pull bar, arm-tie and lock housings, lock housing cover plates all are equipped with the symmetric double convex, rotate rotation projection pulling arm-tie, compressing thin stage clip makes dead bolt leave snap close retraction lock housing and opens the door, pull-off spring then under the elastic force effect dead bolt stretch out lock housing again, if stretch into snap close and can play the pass gate action.Because the thin stage clip structure in dead bolt inclined-plane, though closing the power of the thin stage clip of right easily compression need not be too big, so the place, slit at lock housing and snap close firmly inserts or puts under with things such as stalloy, bottle openers, the inclined-plane can produce the power that makes dead bolt retraction lock housing and open door, and security reliability is poor; Moreover the insurance institution of common spring door lock is that lock is lived dead bolt, and this brake shoe does not link with the rotation projection, and Ruo Menli has gone up insurance, can not open the door with key outdoors very inconvenient.

The purpose of this utility model provides a kind of safe gate lock with shot, it not only keeps simple in structure, easy to manufacture, the strong point that cost is low of common spring door lock, and can in door or outdoors, insure again, gone up insurance outdoors with can open the door not only safe and reliable of key but also safe gate lock with shot easily.

The purpose of this utility model is achieved in that the swivel head of former common spring door lock (uses key rotation lock core outdoors, drive and connect flat, drive the symmetric double convex rotation projection on the lock housing cover plate again, the symmetric double convex rotation projection of Men Li on the hand turning handle drive lock housing) the both sides rotation projection of pulling dead bolt drawhead arm-tie, make lock housing into asymmetrical single convex rotation projection is arranged on one side, and have only junction plate on the lock housing cover plate and two isometric dead bolt pull bars are made into one is long and the other is short, long is connected with arm-tie, junction plate on the lock housing cover plate does not spur the dead bolt pull bar when rotating, but the rotation projection on the drive lock housing is just being done, backward rotation, when the rotation projection on the lock housing rotates to a direction, pulling dead bolt arm-tie, driving dead bolt retraction lock housing unblanks, decontrol the dead bolt arm-tie, dead bolt stretches out lock housing under the stage clip effect lockable; And when another direction was rotated, the top of rotation projection propped up another root pull bar termination on the dead bolt, and locking is insured.Like this,, close identically, then played safety effect in the position that props up the dead bolt short rod with the common spring door lock when rotation projection when not propping up the position of dead bolt short rod.Throwing off dead bolt short rod termination earlier as long as stir the rotation projection with key outdoors, be rotated further then and drive dead bolt long draw arm-tie, compression press spring makes dead bolt retraction lock housing and opens the door.

Owing to adopt such scheme, in door, can both insure outdoors, gone up insurance and can open the door with key outdoors, safe and reliablely make things convenient for again, and simple in structure.

The utility model is described in further detail below in conjunction with accompanying drawing.

Accompanying drawing 1 is the structure diagram that removes the lock housing snap close of lock housing cover plate.

Accompanying drawing 2 is vertical views of Fig. 1.

Accompanying drawing 3 is position views that the rotation projection goes to dead bolt short rod termination and props up.

Accompanying drawing 4 is flap and junction plate graphs of a relation in the middle of the trough of belt.

Among the figure 1, rotation projection 2, arm-tie 3, pull bar 4, stage clip 5, shell 6, dead bolt 7, snap close 8, dividing plate 9, quarter butt termination 10, bar spring 11, revolve 12, flap 15, lock core bar 16, lock core in the middle of the junction plate 13, lock housing cover plate 14, trough of belt

Accompanying drawing 1 shown position is locking but uninsured position, as in door, doing the insurance that key can open the door, as long as rotary handle (11) clockwise rotates about 80 ° and (overcomes the bar spring force during rotation, about 80 ° of plane positioning that make rotation projection periphery have again been changeed, because the rotation projection is limited by backing pin, can not clockwise rotate again).Opening the door outdoors, inserting lock core with key and rotate counterclockwise, lock core bar (15) drives in the middle of the trough of belt flap to be changeed 150 ° approximately and runs into junction plate chimb drive connector and rotate in the same way.Because the chimb of junction plate is clamped the chimb of rotation projection, force the rotation projection to make backwards rotation, go to earlier and throw off the short rod termination, drive pulling block then and make dead bolt compressing stage clip retraction housing, throw off snap close, open the door.Backward rotation is replied stage clip.At this moment, flap has not driven junction plate in the middle of the trough of belt, and key continues to move back and goes to the insertion position, can extract key, still returns back to Fig. 1 position, if go out, to insure (can open with key) after the locking.As long as key is inserted, flap drives connector in the middle of clockwise the making changes about 80 ° again, makes the rotation projection prop up the short rod termination, moves back and changes key to the insertion position, extracts key and gets final product.

Claims (1)

1. A kind of safe gate lock with shot is made up of lock housing, snap close, it is characterized in that: the rotation projection that asymmetric single convex is housed on the lock housing, on the lock housing cover plate junction plate is housed, its end face has protuberance can drive rotation projection on the lock housing, the pull bar that two varying lengths are arranged on the dead bolt, long draw is connected with arm-tie.

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