CN2881003Y - Antitheft door lock - Google Patents

Abstract

An antitheft door lock comprises a lock body (1), two lock cores (3, 7), a billiard hole (5), a billiard spring and a lock tongue. It characterized in that: the lock core has internal-external relative lock cores (3, 7); two lock core holes (4) deflect from the central line; each of the internal-external lock cores is connected with a lock core cover (2, 9); the billiard hole is arranged on lock core cover at the corresponding part of the lock body and the lock core billiard hole; a tooth edge engaged with one end of a straight rack (6) is arranged on the adjacent position of the internal-external lock cores (2, 9); and the other end of the straight rack is connected with the lock tongue. Compared with prior art, the utility model has especially high antitheft performance and cannot be unlocked by normal theft unlocking tools.

Description

Safe-guard door lock

Technical field

The utility model relates to a kind of lock, especially a kind of safe-guard door lock.

Background technology:

The at present commercially available door latch structure that generally uses with people all is by a lock body, lock core of socket in it, lock core and lock body inboard are provided with the pellet shot from a slingshot hole, be provided with spring and pellet shot from a slingshot in the pellet shot from a slingshot hole, lock core one end is by pegging graft with the dial centre bore in flakes, dial touches mutually with the dead bolt that is socketed with spring, after the key of correspondence inserted keyhole, the toothed surfaces by on the key matched with corresponding pellet shot from a slingshot, and lock core and lock body are separated, and by key rotation lock core and dial, drive dead bolt and move backward, make door-lock opening, this lock is except that very easily being opened by corresponding key, also very easily opened with light instruments such as hook bars by the robber, theftproof performance is poor.

The utility model content

The purpose of this utility model is to overcome the prior art deficiency, provide a kind of theftproof performance good safe-guard door lock, the purpose of this utility model realizes by following technical proposals: the utility model comprises lock body, lock core, pellet shot from a slingshot hole and interior marble spring and dead bolt thereof, it is characterized in that: in lock core is, outer two relative lock cores, two lock core keyhole disalignments, in, the outer all socket one lock core covers of outer lock core, on the lock core sleeve at lock body and the corresponding position of lock core marble hole, be provided with the pellet shot from a slingshot hole, in, outer two lock cores cover adjacent regions is provided with a tooth edge that is meshed with spur rack one end, and the spur rack other end links to each other with dead bolt.

The utility model has inside and outside two lock cores, promptly uses the pirate of the open instrument, by dialling pellet shot from a slingshot, a lock core is separated with lock tube, makes this lock core rotatable, but lock tube do not separate with lock body, so lock can not be opened.If a side chain core and lock tube separate with lock body simultaneously, but because of spur rack still with opposite side lock tube interlocking, so lock is not still opened.The anti-theft feature of increase lock, simultaneously owing to having added the lock core cover, even two lock cores all separate with lock tube and run-in synchronism, but owing to two lock cores can not rotate synchronously, can be because of the lock core cover does not separate with lock body yet, lock body can not be opened.After having only the key of specially joining to insert, two lock cores could be separated with lock body and run-in synchronism, rotational lock core drives lock core cover and spur rack motion, can make in the dead bolt and receive, and reaches the purpose of opening door lock.Also having the utility model key hole is not to be located at the lock core center position, and therefore, when a lock core has displacement slightly, then another lock core keyhole then can be covered, and the pirate of the open instrument can't enter keyhole.From above situation as can be known, the purpose of this utility model can reach.Compared with prior art, the utility model theftproof performance is high especially, and general pirate of the open instrument can't be opened.

Description of drawings

Fig. 1 is the utility model configuration diagram;

Fig. 2 looks diagrammatic sketch for the utility model structural portion.

The specific embodiment

Embodiment 1: as shown in Figure 1, 2, the utility model comprises lock body 1, lock core 3,7, pellet shot from a slingshot hole 5 and interior pellet shot from a slingshot, spring and dead bolt thereof.Lock core is interior 3, outer 7 two relative lock cores, two lock core keyhole disalignments, outer all socket one lock cores of inside and outside lock core cover 2,9, on the lock core sleeve at lock body and lock core marble hole 5 corresponding positions, be provided with the pellet shot from a slingshot hole, guarantee that three's pellet shot from a slingshot centerline hole coincides, and the aperture is in full accord, and inside and outside two lock cores cover adjacent regions oral area is equipped with an annular tooth that is meshed with the tooth of spur rack 6 one ends along 8, and spur rack one end links to each other with dead bolt.

Claims (1)

1, a kind of safe-guard door lock, comprise lock body (1), lock core (3,7), pellet shot from a slingshot hole (5) and interior marble spring and dead bolt thereof, it is characterized in that: lock core is inside and outside two relative lock cores (3,7), two lock core holes (4) disalignment, the outer all socket one lock core covers (2,9) of inside and outside lock core, on the lock core sleeve at lock body and the corresponding position of lock core marble hole, be provided with the pellet shot from a slingshot hole, inside and outside two lock cores cover adjacent regions is provided with a tooth that is meshed with spur rack (6) one ends along (8), and the spur rack other end links to each other with dead bolt.

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