CN2771417Y - Antitheft lock - Google Patents

Abstract

The utility model provides an antitheft lock which is provided with a lock body and a lock core which are matched. The utility model is a novel lock set of which the inner part is additionally provided with a safe casing tube, and is not capable of being opened by a universal key or other lock opening tools. When the lock is tried to be opened by using the universal key, the lock core can slip and turn together with the universal key but can not be opened, and a very good antitheft effect is provided. The antitheft lock comprises the lock body, the lock core, upper spring marbles, lower spring marbles, a lock tongue and a circlip, wherein the inner parts of the lock body and the lock core are provided with at least two sets of marble hole canals which are corresponding to each other, the upper spring marbles and the lower spring marbles are contacted in the marble hole canals, and the circlip is used for the fixation of the lock body and the lock core. The utility model is characterized in that the casing tube is sheathed outside the lock core. The side wall of the casing tube is provided with through holes which are corresponding to the lock body and the marble hole canals of the lock core. In addition, the casing tube is linked with the lock tongue.

Description

Theftproof lock

Technical field

The utility model relates to a kind of lockset, in particular, is a kind of antitheft cylinder lock.

Background technology

Lockset is a kind of articles for use indispensable in the daily life, and the most general a kind of lockset is a cylinder lock.Employed various cylinder locks in the reality, though external form is inequality, the internal construction principle is all similar, generally is made of lock body, dead bolt, lock core and spring marble.Be equipped with lock body inside can be for the lock core of key insertion, and lock core top interlock dead bolt, lock body and lock core all are provided with corresponding pellet shot from a slingshot duct, the pellet shot from a slingshot that spring connects is housed in the duct, because the effect of spring, different pellets shot from a slingshot is stuck in the duct of lock body and lock core, and both can't be relatively rotated.During use, the key of unique shape correspondence is inserted the pellet shot from a slingshot that can move each duct behind the lock core, make it occupy corresponding duct separately and lock core and lock body can be relatively rotated, thereby drive lock core, the control dead bolt leaves the edge of a knife, and this moment, cylinder lock was unlocked.

This cylinder lock seems simple and reliable for structure, but be easy to be used other instrument to open the personnel that the experience technology is arranged aspect unblanking, master key is exactly wherein a kind of, its general principles is to be exactly to stir the keyhole that instrument inserts lock core with steel wire, iron plate, tooth mould etc., explore the position and the length of pellet shot from a slingshot, reach nondestructive, no sharp trace ground unlatching lockset thereby stir lock core, make the anti-theft feature of lockset lose meaning.

At taking precautions against the unlocked by universal key lockset, cylinder lock on the market has structurally carried out some improvement, a kind of " preventing the padlock of master key " disclosed as China Patent No. 85102509, its utilization reduces the length of the pellet shot from a slingshot slideway in the lock body, make master key can not back down spring marble fully, take this to carry out antitheft, but this method causes the unlatching of normal key also can compare difficulty, in addition, its principle has determined when using master key to unblank, lock core can not rotate, and it is firmly excessive, just may destroy lock core, final result is to come to naught, though fail to unblank with master key, also damaged the structure of lock, bring certain loss to economy.

Summary of the invention

The purpose of this utility model is to overcome the weak point of existing cylinder lock technology, a kind of structure-improved with lock body, lock core cooperation is provided, inside adds the novel lockset of safe sleeve pipe, it can not opened by master key or other unlocking tool, when attempting with this lock of unlocked by universal key, the lock core rotation of can thereupon skidding together but can't be unlocked, and it has good anti-theft effect.

A kind of theftproof lock of the present utility model, comprise that inside is provided with contacted upper spring pellet shot from a slingshot and lower spring pellet shot from a slingshot, dead bolt in the lock body in corresponding at least two group pellet shot from a slingshot ducts and lock core, the pellet shot from a slingshot duct, is used for fixing the jump ring of lock body and lock core, it is characterized in that: described lock core sleeve has a sleeve pipe, described sleeve pipe sidewall offers the through hole corresponding with the pellet shot from a slingshot duct of lock body and lock core, and sleeve pipe interlock dead bolt.

Structure of the present utility model is very simple, but anti-theft effect is apparent, and this cylinder lock has prevented that effectively master key or other unlocking tool from opening, and it is with low cost in addition, and adding man-hour need not other additional process, very is easy to promote.

Description of drawings

Fig. 1 is a structural profile schematic diagram of the present utility model;

Fig. 2 is that the A-A of Fig. 1 is to sectional view;

Fig. 3 is the structural profile schematic diagram of lock core of the present utility model;

Fig. 4 is that the B-B of this Fig. 3 is to sectional view;

Fig. 5 is the structural representation of lock core of the present utility model;

Fig. 6 is the structural profile schematic diagram of sleeve pipe of the present utility model;

Fig. 7 is the structural representation of sleeve pipe of the present utility model;

Fig. 8 is the schematic diagram of unlocked by universal key common spring lock;

Fig. 9 prevents the schematic diagram of unlocked by universal key for the utility model.

Wherein: lock body 1, sleeve pipe 2, lock core 3, jump ring 4, alignment pin 5, upper spring pellet shot from a slingshot 6, lower spring pellet shot from a slingshot 7, pellet shot from a slingshot duct 8, master key 9, torque spanner 10, through hole 11

The specific embodiment

The present invention is described in further detail below in conjunction with accompanying drawing.

As Fig. 1---Figure 7 shows that structural representation of the present utility model, in the present embodiment, its structure comprises lock body 1, sleeve pipe 2, lock core 3, jump ring 4, alignment pin 5, upper spring pellet shot from a slingshot 6, lower spring pellet shot from a slingshot 7, pellet shot from a slingshot duct 8, through hole 11.

Have the through hole 11 with pellet shot from a slingshot duct 8 correspondences of lock core 3, lock body 1 on sleeve pipe 2, in the present embodiment, pellet shot from a slingshot duct 8 and corresponding with it number of openings are five groups.Sleeve pipe 2 is enclosed within lock core 3 outsides, be provided with alignment pin 5 between the two, sleeve pipe 2 and lock core 3 cannot be slided but can rotate relatively freely, sleeve pipe 2 and lock core 3 are packed in the lock body 1 together, and block with jump ring 4, the key with correspondence when normally unblanking inserts lock core 3, because the key bit correspondence is with every group of spring marble jack-up and equal with the joint in lock spring duct with sleeve pipe, during key, lock core 3 rotates with sleeve pipe 2, and the interlock dead bolt rotates and unlocking spring lock.

Fig. 8 is the schematic diagram of existing cylinder lock by unlocked by universal key the time, lock core 3 inserts in the lock body 1, both pellet shot from a slingshot duct 8 corresponding connections, pellet shot from a slingshot 6,7 is contained in the pellet shot from a slingshot duct 8 in turn up and down, under spring action, each is organized pellet shot from a slingshot and presses down, and because the length difference of each group pellet shot from a slingshot, and making the junction irrelevancy of the joint of upper spring pellet shot from a slingshot 6 and lower spring pellet shot from a slingshot 7 and lock body 1, lock core 3, this moment, lock core 3 can't rotate in lock body 1.Have only with being provided with and the original key insertion of the key bit of pellet shot from a slingshot length coupling up and down, can open lockset with the jack-up pellet shot from a slingshot to equal with lock body lock core junction.And use master key to insert lock core hole, and can explore the length of lower spring pellet shot from a slingshot, and press its length jack-up pellet shot from a slingshot to equal with the lock body junction, rotate by torque spanner rotation master key, drive the lock core rotation lockset is opened.

Fig. 9 is theftproof lock of the present utility model antitheft principle schematic by unlocked by universal key the time, equally master key 9 is inserted lock core hole, explore after the length of lower spring pellet shot from a slingshot 7, can only be by its length jack-up pellet shot from a slingshot to equal with sleeve pipe 2 junctions with lock core 3, but upper spring pellet shot from a slingshot 6 still is stuck between the pellet shot from a slingshot duct of lock body 1 and sleeve pipe 2, cause lock body 1 and sleeve pipe 2 not to relatively rotate, this moment is when rotating torque spanner 10, lock core 3 relative sleeve pipe 2 idle running have just been driven, can not drive interlock and rotate, promptly can't open this lockset in the dead bolt of sleeve pipe.

Claims (3)

1, a kind of theftproof lock, comprise that inside is provided with contacted upper spring pellet shot from a slingshot (6) and lower spring pellet shot from a slingshot (7), dead bolt in the lock body (1) in corresponding at least two group pellet shot from a slingshot ducts (8) and lock core (3), the pellet shot from a slingshot duct, is used for fixing the jump ring (4) of lock body (1) and lock core (3), is characterized in that:

Described lock core (3) is outer to be with a sleeve pipe (2), and this sleeve pipe (2) sidewall offers the through hole (11) corresponding with the pellet shot from a slingshot duct (8) of lock body (1) and lock core (3), and sleeve pipe (2) interlock dead bolt.

2, theftproof lock as claimed in claim 1 is characterized in that: described sleeve pipe (2) and lock core (3) are installed on the alignment pin (5) of fixing both relative positions.

3, theftproof lock as claimed in claim 1 is characterized in that: the pellet shot from a slingshot duct (8) that described lock body (1) and lock core (3) are offered is five groups.

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