CN201265291Y

CN201265291Y - Burglarproof lock

Info

Publication number: CN201265291Y
Application number: CNU2008201636438U
Authority: CN
Inventors: 乐祥龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-27
Filing date: 2008-08-27
Publication date: 2009-07-01
Anticipated expiration: 2018-08-27

Abstract

The utility model discloses an anti-theft lock, comprising a steel sleeve (6), a fixed lock core (1), a movable lock core (7), a rotating sleeve (8), steel balls (9), an extension spring (10) and a thrust ring (12), wherein, the fixed lock core (1) and the movable lock core (7) are rotatably matched with each other; the fixed lock core (1) is firmly matched with the steel sleeve (6); the movable lock core (7) is provided with a step (14) which is pressed on the fixed lock core (1) by the thrust ring (12); the thrust ring (12) is fixed on the steel sleeve (6); the rotating sleeve (8) is rotatably connected with the inside of the movable lock core (7); the steel balls (9) are arranged in through holes of the step (14) and are inlaid in grooves of the rotating sleeve (8); and the steel balls (9) are hooped in the extension spring (10) in the step (14). With the structure, when encountering the abnormal external force, the rotating sleeve can slip, so the lock can not be opened, thus further inproving the anti-theft performance of the anti-theft lock.

Description

Theftproof lock

Technical field

The utility model relates to a kind of mechanical lock, specifically is a kind of theftproof lock that is applicable to that destroyed property can shield when unblanking.

Background technology

Existing mechanical is locked at present, be to utilize key teeth groove control lock core pellet shot from a slingshot position to unblank, its lock core is generally by the lock core parent, lock core rotor, spring and pellet shot from a slingshot constitute, lock core rotor is installed in the lock core parent, lock core rotor is provided with can be for the key hole of key insertion, the top of lock core rotor is equipped with dead bolt, lock core parent and lock core rotor all are provided with corresponding pellet shot from a slingshot duct, the spring of packing into successively in the pellet shot from a slingshot duct, pellet shot from a slingshot, spring is between bottom, pellet shot from a slingshot duct and pellet shot from a slingshot, different pellets shot from a slingshot is under the driving of its spring, be stuck in the pellet shot from a slingshot duct at lock core parent and lock core rotor mating face place, thereby lock core parent and lock core rotor can't be relatively rotated, realize the relative locking of lock core parent and lock core rotor, promptly have only the tooth portion of key to make in the duct of pellet shot from a slingshot indentation correspondence separately, the plane of rotation of each pellet shot from a slingshot end face and lock core rotor maintains an equal level, and could realize opening of cylinder lock like this.But this theftproof lock only depends on pellet shot from a slingshot and lock core rotor to reach anti-theft feature, and its pellet shot from a slingshot fractures under the effect of the lock core rotor that the brute force that is subjected to aid is reversed easily, thereby makes improper the opening in theftproof lock destroyed property ground.Therefore, the theftproof performance of existing cylinder lock is unsatisfactory.

The utility model content

Technical problem to be solved in the utility model is that a kind of theftproof lock that can improve theftproof performance is provided.

For solving the problems of the technologies described above, a kind of theftproof lock that the utility model provides, comprise steel bushing, fixed lock core, flexible lock core, several compression springs, pellet shot from a slingshot, described fixed lock core and steel bushing tight fit, described flexible lock core cooperates with fixed lock core is rotatable, and described pellet shot from a slingshot is by compressing spring compression in the duct.Described theftproof lock also comprises turning set, steel ball, extension spring and thrust ring, and described flexible lock core has step, and described step is pressed on the fixed lock core by thrust ring.Described thrust ring is fixedlyed connected with steel bushing.Described turning set is rotationally connected with in the flexible lock core.Described steel ball is positioned at the through hole of step, and is embedded in the groove on the turning set, and steel ball all binds round and is being positioned at the extension spring of step.

After adopting above structure, the utility model compared with prior art, have the following advantages: owing to increased turning set and associated steel ball and extension spring in the theftproof lock, do the time spent as improper external force, because the centre of sphere of steel ball is in flexible lock core one side, steel ball can be expressed in the through hole of flexible lock core fully, lose this connector of steel ball like this between turning set and the flexible lock core, promptly there has not been the location, just can freely rotate, thereby the phenomenon that the cover that rotates skids makes the external force transmission less than on the flexible lock core, therefore lock just can't be opened, and then improves the theftproof performance of theftproof lock.

As improvement, described step is pressed on the fixed lock core by thrust ring, is meant that a side stage terrace of step and the end face of fixed lock core be close to, and the end face of opposite side step surface and thrust ring is close to.Described thrust ring is fixedlyed connected with steel bushing, is meant that described thrust ring fixedlys connected with steel bushing by pin.Adopt above these structures can make lock structure simpler.

As further improvement, described turning set is connected with flexible lock core by back-up ring; Described steel ball is positioned at the through hole of step and is embedded in groove on the turning set, is meant that the step circumferencial direction has cannelure, and is provided with at the annular bottom surface of cannelure that several equate with steel ball number, equally distributed through hole along the circumferential direction; Have the groove identical with through-hole diameter on the described turning set, the longitudinal center line of groove overlaps with the longitudinal center line of through hole; The part of described steel ball is positioned at through hole, and its part of stretching out through hole lays respectively in cannelure and the groove, and described extension spring is positioned at cannelure and joins end to end.After adopting this structure, can make the theftproof performance of theftproof lock desirable more.

As further improving, described pellet shot from a slingshot is the step pellet shot from a slingshot, and the duct on the described flexible lock core correspondingly also is the step duct.After adopting this step pellet shot from a slingshot and duct, both can guarantee that pellet shot from a slingshot was not extruded from the duct, and can make pellet shot from a slingshot do the time spent being subjected to external force again, what at first destroy is thinner part, and the thicker part branch that is in can be not destroyed in the duct in, thereby makes theftproof performance better.

Description of drawings

Shown in Figure 1 is the structural representation of the utility model theftproof lock;

Shown in Figure 2 is the structure for amplifying schematic diagram of I part among Fig. 1;

Shown in Figure 3 is among Fig. 1 along the structure for amplifying schematic diagram in A-A direction cross section.

Wherein, 1, fixed lock core; 2, compression spring; 3, pellet shot from a slingshot; 4, back-up ring; 5, dead bolt; 6, steel bushing; 7, flexible lock core; 8, turning set; 9, steel ball; 10, extension spring; 11, pin; 12, thrust ring; 13, cannelure; 14, step; 15, groove; 16, through hole.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

By the structural representation of annular theftproof lock shown in Figure 1 as can be known, this theftproof lock, comprise steel bushing 6, fixed lock core 1, flexible lock core 7, several compression springs 2, pellet shot from a slingshot 3, described fixed lock core 1 and steel bushing 6 tight fits, described

flexible lock core

7 and 1 rotatable cooperation of fixed lock core, described pellet shot from a slingshot 3 is pressed in the duct by compression spring 2.Described theftproof lock also comprises turning set 8, steel ball 9, extension spring 10 and thrust ring 12, and described flexible lock core 7 has step 14, and described step 14 is pressed on the fixed lock core 1 by thrust ring 12.Described thrust ring 12 is fixedlyed connected with steel bushing 6 by pin 11.Described turning set 8 is rotationally connected with in the flexible lock core 7.Described steel ball 9 is positioned at the through hole 16 of step 14, and is embedded in the groove 15 on the turning set 8, and steel ball 9 all binds round the extension spring 10 that is being positioned at step 14.Described step 14 is pressed on the fixed lock core 1 by thrust ring 12, is meant that a side stage terrace of step 14 and the end face of fixed lock core 1 be close to, and the end face of opposite side step surface and thrust ring 12 is close to.

By the local enlarged diagram of Fig. 2, the utility model theftproof lock shown in Figure 3 as can be known, described turning set 8 is connected with flexible lock core 7 by back-up ring 4.Described steel ball 9 is positioned at the through hole 16 of step 14 and is embedded in shrinkage pool 15 on the turning set 8, be meant that step 14 circumferencial directions have cannelure 13, and be provided with at the annular bottom surface of cannelure 13 that several equate with steel ball 9 quantity, equally distributed through hole 16 along the circumferential direction.Have the shrinkage pool 15 identical with through hole 16 diameters on the described turning set 8, the longitudinal center line of shrinkage pool 15 overlaps with the longitudinal center line of through hole 16.The centre of sphere of described steel ball 9 partly is positioned at through hole 16, and the part that its spheroid stretches out through hole 16 lays respectively in cannelure 13 and the shrinkage pool 15, and described extension spring 10 is positioned at cannelure 13 and joins end to end, and pushes down the part that steel ball 9 stretches out through hole 16.Cannelure 13 can be so that extension spring 10 can not move axially along flexible lock core 7, and can regulate the moment of torsion that slides relatively between turning set 8 and the flexible lock core 7 by the sphere center position of control steel ball 9 or the pulling force of extension spring 10.The optimal number of described steel ball 9 is 4.

When using key to open this theftproof lock, use by normal lock.When the key that does not match is unnormal unlocking; because key hole is circular; can't exert all one's strength; even tool for destroying is deep in the turning set 8; because by steel ball 9 and the overload protecting mechanism formed around extension spring 10; external force arrives to a certain degree greatly; steel ball 9 can be extruded shrinkage pool 15 and enter into fully in the through hole 16; do not have between turning set 8 and the flexible lock core 7 like this will in flexible lock core 7, rotate behind the location of steel ball 9; therefore can produce skidding; can't make flexible lock core 7 rotations, thereby not open this theftproof lock.

The utility model theftproof lock is not limited to above-described structure, and the design of this tapered end can also be used for the lockset of other types, as various locksets such as door lock, drawer-locks; The quantity of steel ball also can be other numbers; Pellet shot from a slingshot in the duct also can be two rows; These variations all fall within the utility model protection domain.

Claims

1, a kind of theftproof lock, comprise steel bushing (6), fixed lock core (1), flexible lock core (7), several compress spring (2), pellet shot from a slingshot (3), described fixed lock core (1) and steel bushing (6) tight fit, described flexible lock core (7) cooperates with fixed lock core (1) is rotatable, described pellet shot from a slingshot (3) is pressed in the duct by compression spring (2), it is characterized in that: described theftproof lock also comprises turning set (8), steel ball (9), extension spring (10) and thrust ring (12), described flexible lock core (7) has step (14), and described step (14) is pressed on the fixed lock core (1) by thrust ring (12); Described thrust ring (12) is fixedlyed connected with steel bushing (6); Described turning set (8) is rotationally connected with in the flexible lock core (7); Described steel ball (9) is positioned at the through hole (16) of step (14), and is embedded in the shrinkage pool (15) on the turning set (8), and steel ball (9) all binds round in the extension spring that is positioned at step (14) (10).

2, theftproof lock according to claim 1, it is characterized in that: described step (14) is pressed on the fixed lock core (1) by thrust ring (12), be meant that a side stage terrace of step (14) and the end face of fixed lock core (1) be close to, the end face of opposite side step surface and thrust ring (12) is close to.

3, theftproof lock according to claim 1 is characterized in that: described thrust ring (12) is fixedlyed connected with steel bushing (6), is meant that described thrust ring (12) passes through pin (11) and fixedlys connected with steel bushing (6).

4, theftproof lock according to claim 1 is characterized in that: described turning set (8) is connected with flexible lock core (7) by back-up ring (4); Described steel ball (9) is positioned at the through hole (16) of step (14) and is embedded in shrinkage pool (15) on the turning set (8), be meant that step (14) circumferencial direction has cannelure (13), and be provided with at the annular bottom surface of cannelure (13) that several equate with steel ball (9) quantity, equally distributed through hole (16) along the circumferential direction; Have the shrinkage pool (15) identical with through hole (16) diameter on the described turning set (8), the longitudinal center line of shrinkage pool (15) overlaps with the longitudinal center line of through hole (16); The part of described steel ball (9) is positioned at through hole (16), and its part of stretching out through hole (16) lays respectively in cannelure (13) and the shrinkage pool (15), and described extension spring (10) is positioned at cannelure (13) and joins end to end.

5, theftproof lock according to claim 1 is characterized in that: described pellet shot from a slingshot (3) is the step pellet shot from a slingshot, and the duct on the described flexible lock core (7) correspondingly also is the step duct.