Lock with good anti-theft performance

Abstract

The lock with the good anti-theft performance comprises a lock cylinder and a key, the lock cylinder comprises a lock shell, a lock container installed in the lock shell and a shifting sleeve installed on the lock shell and connected with one end of the lock container, a key hole allowing the key to be inserted is axially formed in the lock container in a penetrating mode, and the lock shell comprises a lock shell connecting part and an installation cavity used for installing the lock container. At least two sets of inclined bead locking assemblies which are arranged in an inclined and staggered mode are further arranged between the lock shell and the lock container, and tooth holes correspondingly matched with the inclined bead locking assemblies are formed in the key. When the key is not inserted into the key hole of the lock cylinder or the key is incorrectly inserted into the key hole, the front end of the inclined bead locking assembly is jacked into the lock cylinder and the key hole, and therefore locking is achieved. When the key is gradually inserted into the lock cylinder along the key hole, the inclined bead locking assembly is jacked into the corresponding matched tooth hole by the key, and at the moment, the key is rotated to drive the lock cylinder to rotate to achieve unlocking. According to the lock, the anti-theft performance is improved, the technical unlocking difficulty is increased, and the key copying difficulty is improved.

Description

Technical Field

[0001] The present invention relates to the field of locks, and particularly to a lock with good anti-theft performance. Background Art

[0002] In the field of locks, as the core component to ensure security, the anti-theft performance of the lock core has always been the focus of research and development. At present, the common lock cores on the market can be mainly divided into the following two categories in terms of anti-theft structure design:

[0003] The first category is the lock core solution using a single type of bead. This type of lock core usually selectively uses one of the beads such as floating beads, side beads, marbles, mother-and-son beads, etc. as the core anti-theft component. Due to its simple structure and fewer components, the production and manufacturing cost is relatively low, and the assembly and use are also relatively convenient. However, this structure design of a single bead has obvious potential safety hazards. Because of the strong regularity of its internal structure, criminals can relatively easily achieve technical unlocking through professional tools and techniques; at the same time, due to the relatively simple corresponding relationship between the key tooth shape and the bead structure, the key duplication is easy, resulting in poor anti-theft performance of this type of lock core and it is difficult to meet the growing security needs.

[0004] The second category is the lock core solution using the combination of two types of beads. Common combinations include the combination of side beads and marbles, the combination of side beads and floating beads, etc. This type of solution enhances the anti-theft performance of the lock core to a certain extent. Its principle is that the two types of beads cooperate with each other at different positions and in different movement modes to increase the complexity of unlocking. However, this solution also has many defects: First, the structure is complex and the number of components increases, resulting in a cumbersome production and manufacturing process, which not only increases the processing difficulty and cost, but also makes the installation process more difficult and reduces the production efficiency; Second, in this type of solution, the side beads are usually installed by drilling holes on the side of the lock cylinder, while the marbles or floating beads, etc. are generally installed vertically by drilling holes at the upper or lower end of the lock cylinder, and the marbles or floating beads in the same row have the same size and structure and make vertical radial movements in the holes. After long-term use, this structure layout has been known to criminals. Due to the regular corresponding relationship between the tooth holes on the key and the bead structure, criminals can relatively easily achieve unlocking according to the conventional lock core structure layout by using professional tools or technical means; at the same time, the key duplication is also relatively easy, and the problem of insufficient anti-theft performance of the lock core cannot be fundamentally solved.

[0005] Therefore, how to improve the anti-theft performance of the lock core, increase the difficulty of key duplication and illegal unlocking on the premise of ensuring simple structure and convenient manufacturing has become an important issue that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0006] The present invention overcomes the above-mentioned deficiencies in the technology and provides a lock with good anti-theft performance.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A lock with good anti-theft performance, including a lock core and a key. The lock core includes a lock shell, a lock cylinder installed in the lock shell, and a shifting sleeve installed on the lock shell and connected to the lock cylinder. An axially penetrating key hole for inserting the key is provided on the lock cylinder. The lock shell includes a lock shell connection part and an installation cavity for installing the lock cylinder. At least two groups of obliquely staggered oblique bead locking components are arranged between the lock shell and the lock cylinder. The key is provided with tooth pattern holes corresponding to and cooperating with the oblique bead locking components. When no key is inserted into the key hole of the lock cylinder or the inserted key is incorrect, the front end of the oblique bead locking component is pushed into the lock cylinder and into the key hole, thereby realizing locking. When the key is gradually inserted into the lock cylinder along the key hole, the oblique bead locking component is pushed into the correspondingly matching tooth pattern hole by the key. At this time, turning the key can drive the lock cylinder to rotate to realize unlocking.

[0009] Further, the oblique bead locking component includes a first spring, a flat bead abutted against the upper end of the first spring, and a main bead abutted against the upper end of the flat bead. The lock shell connection part is obliquely and staggeredly provided with first installation holes communicating with the installation cavity. The lock cylinder is obliquely and staggeredly provided with second installation holes communicating with the key hole. The first spring and the flat bead are installed in the first installation holes. The main bead is limit-installed in the second installation holes. The first installation holes and the second installation holes are coaxially communicated. The diameter of the first installation holes is the same as the lower diameter of the second installation holes. The diameter of the flat bead is the same as the lower diameter of the main bead.

[0010] Further, the second installation hole includes a limit hole and a movable hole. The diameter of the limit hole is larger than that of the movable hole, so as to form a limit inner ring at the connection between the two. The main bead is bullet-shaped. The main bead includes a limit end movably arranged in the limit hole and a movable end movably arranged in the movable hole. A limit outer ring is formed at the connection between the limit end and the movable end.

[0011] Further, three to six groups of the oblique bead locking components are provided, and correspondingly three to six tooth pattern holes are provided.

[0012] Further, the orifice diameter and the depth of each tooth pattern hole are different.

[0013] Further, the lock core further includes a side bead locking component and a cross grid locking component that cooperates with the side bead locking component to lock the lock cylinder. When no key is inserted into the lock cylinder or the inserted key is incorrect, both the side bead locking component and the cross grid locking component are in the locked state. When the correct key is inserted into the lock cylinder, the side bead locking component is driven to move, so that the cross grid locking component is unlocked to realize unlocking.

[0014] Furthermore, the side bead locking assembly is provided with at least two groups, and the side bead locking assembly includes a side bead hole opened on the side wall of one of the left and right ends of the lock core, a second spring installed at the bottom of the side bead hole, and a side bead installed in the side bead hole and abutting against the second spring at one end, the upper side of the side bead is provided with a first groove facing upward and the lower end is extended downward to provide a top foot, and the key is provided with a serpentine groove matching the top foot.

[0015] Furthermore, the horizontal grid locking assembly includes a horizontal grid groove on the side wall of the upper end of the lock core and connected to the side bead hole, a horizontal grid inserted in the horizontal grid groove and capable of radially moving in the horizontal grid groove, a third mounting hole is recessed at the bottom of both ends of the horizontal grid groove, a third spring is installed in the third mounting hole, and the horizontal grid includes an extension portion arranged at its two ends, and the lower ends of the extension portions at both ends respectively abut against the third springs at both ends.

[0016] Furthermore, a long groove is recessed on the inner wall surface of the installation cavity for limiting the horizontal grid and thus restricting the rotation of the lock core. The cross-section of the long groove is arc-shaped, and an arc-shaped strip matching the shape of the long groove is provided at the upper end of the horizontal grid.

[0017] Furthermore, an anti-drill plate is inserted on the lock core, an anti-drill pin is inserted on the lock shell, and a second groove is opened upward on the upper side of the side bead. The second groove is located on the left side of the first groove and its depth is lower than the depth of the first groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This case changes the way the beads in the original prior art move vertically radially in the hole by setting up obliquely staggered oblique bead locking components. The oblique movement trajectory of the oblique bead locking components breaks the planar locking structure of the traditional lock core. Criminals cannot simultaneously unlock multiple sets of oblique bead locking components by conventional unidirectional toggling tools such as prying pieces and hooks, which increases the anti-theft performance and is not easy to be opened by technology. This obliquely staggered oblique bead locking component prevents criminals from trying to unlock in one direction by means of hand feedback and other methods. They need to deal with the resistance of the oblique bead locking components in multiple directions and a variety of coding combinations at the same time, making it difficult to open by technology. Since the oblique bead locking component is set up, the path of the traditional vertical radial movement is changed, so the tooth hole corresponding to the key needs to match the inclination angle of the oblique bead locking component, so that the angle and tooth depth need to be accurately measured when the key is copied, which increases the difficulty of copying. Compared with the traditional single-bead structure lock core, it has better security; compared with the traditional double-bead combination structure lock core, it has a simpler structure and better security. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded diagram of the overall structure of the lock in this case.

[0021] Figure 2 It is one of the structural schematic diagrams of the inclined ball locking component in this case.

[0022] Figure 3 It is the second structural schematic diagram of the inclined ball locking component in this case.

[0023] Figure 4 It is the front view of the lock case in this case.

[0024] Figure 5 It is in this case Figure 4 The sectional view in the A-A direction.

[0025] Figure 6 It is the bottom view of the lock cylinder in this case.

[0026] Figure 7 It is the structural schematic diagram of the key in this case.

[0027] Figure 8 It is one of the combined state diagrams after the key is inserted into the lock cylinder in this case.

[0028] Figure 9 It is in this case Figure 8 The sectional view in the B-B direction.

[0029] Figure 10 It is the second combined state diagram after the key is inserted into the lock cylinder in this case.

[0030] Figure 11 It is in this case Figure 10 The sectional view in the C-C direction.

[0031] Figure 12 It is the structural schematic diagram of the side ball in this case. Specific embodiments

[0032] The features of the present invention and other related features are further described in detail through the following embodiments for the understanding of those skilled in the same industry:

[0033] As Figures 1 to 12 shown, this case discloses a lock with good anti-theft performance, including a lock cylinder 100 and a key 200. The lock cylinder 100 includes a lock case 1, a lock cylinder 2 installed in the lock case 1, and a dial sleeve 8 installed on the lock case 1 and connected to one end of the lock cylinder 2. An axially penetrating key hole 21 for inserting the key 200 is provided on the lock cylinder 2. The lock case 1 includes a lock case connection portion 11 and an installation cavity 12 for installing the lock cylinder 2. At least two groups of inclined ball locking components 3 arranged obliquely and staggered are further provided between the lock case 1 and the lock cylinder 2. For the specific illustration of the oblique and staggered arrangement, please refer specifically to Figure 2 、 Figure 3As shown by the inclined ball locking component 3, that is, the inclination angles of each inclined ball locking component 3 are the same, and the intervals between two adjacent inclined ball locking components 3 are the same, thus forming an oblique staggered arrangement. Specifically, when implemented, the inclination angle of each inclined ball locking component 3 is 45 degrees to form a spatial cross locking, and at the same time, it is convenient to cope with the resistance of the inclined ball locking components in multiple directions and various coding combinations. Correspondingly, keyholes 201 corresponding to and cooperating with the inclined ball locking components 3 are provided on the key 200 to correspond to the inclined ball locking components 3 one by one to achieve unlocking. Specifically, when no key 200 is inserted into the keyhole 21 of the lock cylinder 2 or the inserted key 200 is incorrect, the front end of the inclined ball locking component 3 is pushed into the lock cylinder 2 and into the keyhole 21, thus achieving locking; when the key 200 is gradually inserted into the lock cylinder 2 along the keyhole 21, the inclined ball locking component 3 is pushed into the corresponding keyhole 201 by the key 200. At this time, turning the key 200 can drive the lock cylinder 2 to rotate to achieve unlocking.

[0034] As described above, in this case, at least two groups of obliquely staggered inclined ball locking components 3 are further provided between the lock shell 1 and the lock cylinder 2. The structure of the inclined ball locking component 3 is used to adaptively improve the internal structures of the lock shell 1 and the lock cylinder 2, which is different from the conventional lock core structure on the market, thereby achieving the effect of increasing the anti-theft performance. At the same time, the structure is simple and convenient to manufacture. In addition, due to the obliquely staggered inclined ball locking components 3, the overall structure inside the lock core 100 and the structure of the keyhole 201 of the key 200 are changed. Compared with the conventional design, it increases the difficulty for criminals to illegally unlock and duplicate keys.

[0035] Specifically, referring to Figures 1 - 11 As shown, the inclined ball locking component 3 includes a first spring 31, a flat ball 32 abutted against the upper end of the first spring 31, and a main ball 33 abutted against the upper end of the flat ball 32. When implemented, the first spring 31 is a spiral compression spring to ensure that the flat ball 32 is always subjected to an upward thrust, providing continuous elastic force to drive the flat ball 32 to move upward and indirectly push the main ball 33 into the locking position. Through the linkage of the first spring 31, the flat ball 32 and the main ball 33, the locking state is ensured to be reliable under the stable elastic force output, avoiding accidental unlocking caused by vibration or external force. First mounting holes 111 communicating with the mounting cavity 12 are obliquely and staggeredly provided on the lock shell connecting portion 11, and second mounting holes 22 communicating with the keyhole 21 are obliquely and staggeredly provided on the lock cylinder 2. The first spring 31 and the flat ball 32 are mounted in the first mounting holes 111. The main ball 33 is limit-mounted in the second mounting holes 22. For the schematic illustration of the oblique and staggered arrangements of the first mounting holes 111 and the second mounting holes 22 respectively, specifically refer to Figure 5 、 Figure 6 、 Figure 9As shown, its inclination angle is consistent with the oblique bead locking assembly 3, and is also preferably forty-five degrees. The first mounting hole 111 and the second mounting hole 22 provide an oblique motion trajectory for the oblique bead locking assembly 3, so that the movement direction of the flat bead 32 and the main marble 33 is different from the traditional vertical diameter movement. The obliquely arranged channel increases the difficulty of inserting illegal tools, and non-matching keys cannot reach all oblique bead locking assemblies 3 at the same time. The first mounting hole 111 is coaxially connected to the second mounting hole 22. This coaxially connected design can effectively ensure the installation accuracy of the oblique bead locking assembly 3 and avoid jamming caused by hole position deviation. The diameter of the first mounting hole 111 is the same as the lower end diameter of the second mounting hole 22, and the diameter of the flat bead 32 is the same as the lower end diameter of the main marble 33.

[0036] That is to say, the upper end of the main marble 33 is limited in the first mounting hole 111 and will not fall out of the second mounting hole 22. The lower end thereof can extend into the first mounting hole 111, and the flat marble 32 can extend upward into the second mounting hole 22.

[0037] When the lock core 100 is in a locked state, under the elastic force of the first spring 31, the first spring 31 drives the flat bead 32 to lift the main marble 33, and the front end of the flat bead 32 rises into the second mounting hole 22, and the main marble 33 extends upward from the second mounting hole 22 into the key hole 21, because the flat bead 32 is stuck on the first mounting hole 111 and the second mounting hole 22 at the same time, thereby locking the lock core 2. When unlocking is required, with the insertion of the key 200, the main marble 33 is pressed down until it is pressed into the corresponding matching tooth hole 201, at which time the flat bead 32 is completely stuck in the first mounting hole 111, and the main marble 33 is completely stuck in the second mounting hole 22, at which time the main marble 33 and the flat bead 32 can be separated from the abutment state, and the key 200 can be turned to drive the lock core 2 to rotate, and then the main marble 33 and the flat bead 32 are separated to unlock.

[0038] In this way, when the criminals use the incorrect key 200 or other foreign objects to insert into the lock core 2 for illegal opening, the main marble 33 may be pressed too far into the second mounting hole 22 or the main marble 33 may not be retracted into the second mounting hole 22 by a sufficient length. When the main marble 33 is pressed too far into the second mounting hole 22, the lower end of the main marble 33 will enter the first mounting hole 111. At this time, the main marble 33 will be stuck on the first mounting hole 111 and the second mounting hole 22 at the same time, thereby locking the lock core 2. When the main marble 33 is not retracted into the second mounting hole 22 by a sufficient length, the upper end of the flat bead 32 will be stuck into the second mounting hole 22. At this time, the flat bead 32 will be stuck on the first mounting hole 111 and the second mounting hole 22 at the same time, thereby locking the lock core 2. This linkage mode has good anti-theft performance, good security, and difficulty in copying keys.

[0039] Further, continue to refer to Figures 1 - 11 For details, please refer toFigure 9 As shown in the figure. The second mounting hole 22 includes a limiting hole 221 and a movable hole 222. The diameter of the limiting hole 221 is larger than that of the movable hole 222, so as to form a limiting inner ring 223 at the connection of the two. In specific implementation, the main ball 33 is bullet-shaped, that is, the movable end 332 of the main ball 33 is the tip part of the bullet. The bullet-shaped movable end 332 reduces the contact area with the keyhole 21 and increases the difficulty of applying force by illegal tools. The main ball 33 includes a limiting end 331 movably arranged in the limiting hole 221 and a movable end 332 movably arranged in the movable hole 222. A limiting outer ring 333 is formed at the connection of the limiting end 331 and the movable end 332. In specific implementation, in this embodiment, the diameter of the first mounting hole 111 is the same as that of the limiting hole 221 of the second mounting hole 22, and the diameter of the flat ball 32 is the same as that of the limiting end of the main ball 33. Through the cooperation of the limiting inner ring 223 and the limiting outer ring 333, the axial displacement range of the main ball 33 is accurately limited, and the accuracy of unlocking and locking of the lock is improved. The stroke of the main ball 33 is strictly limited within a safe range, avoiding the excessive ejection of the main ball 33 caused by the too large elastic force of the first spring 31 or the complete retraction of the main ball 33 caused by external force impact, ensuring that the movable end 332 of the main ball 33 always maintains a fixed protruding length in the locked state of the lock core 100, and improving the stability of the lock in this case.

[0040] Furthermore, to ensure good anti-theft performance while ensuring that there is no overly complex production and assembly process, in specific implementation, three to six sets of inclined ball locking components 3 are provided, and three to six corresponding keyway holes 201 are opened. Preferably, in this case, six sets of inclined ball locking components 3 are provided, and six corresponding keyway holes 201 are opened. Setting more inclined ball locking components 3 and keyway holes 201 corresponds to more different unlocking structures, increasing the difficulty of unlocking. Multiple sets of inclined ball locking components 3 simultaneously lock the lock cylinder 2 and the lock shell 1. When illegally unlocking, it is necessary to release the locks of all groups at the same time, and a single-direction tool cannot complete it, and the technical unlocking difficulty increases geometrically.

[0041] As Figure 7 shown, specifically, to cooperate with the inclined ball locking component 3 to achieve better anti-theft performance, the orifice diameter and the depth of each keyway hole 201 are different. Due to the differential design of each keyway hole 201, it breaks the regular coding of the equidistant and equal-depth keyways of the traditional lock core, forming a random coding without rules, making it difficult for lawbreakers to crack by trial and error, increasing the difficulty of technical unlocking. This also makes the duplication of the key 200 more difficult, because when duplicating the key, it is necessary to obtain the diameter and depth parameters of all keyway holes at the same time, cutting off the illegal duplication route from the source.

[0042] On the other hand, the gum holes 201 at different depths require different insertion forces and strokes for the key 200. When inserting a non-matching key 200, due to diameter or depth deviation, it is impossible to accurately press down all the main marbles 33, resulting in the still jamming of the lock cylinder 2 and the lock shell 1, forming an obvious jamming feedback to remind the user of abnormal operation; at the same time, it also makes non-technical unlocking more difficult.

[0043] As Figures 1 - 12 shown, as a preferred embodiment of the present invention, further, the lock core 100 further includes a side bead locking assembly 4 and a cross-bar locking assembly 5 that cooperates with the side bead locking assembly 4 to lock the lock cylinder 2. When no key 200 is inserted into the lock cylinder 2 or the inserted key 200 is incorrect, both the side bead locking assembly 4 and the cross-bar locking assembly 5 are in a locked state. When the correct key 200 is inserted into the lock cylinder 2, it drives the side bead locking assembly 4 to move, thereby unlocking the cross-bar locking assembly 5 to achieve unlocking. Through the independent and mutual cooperation of the inclined bead locking assembly 3, the side bead locking assembly 4, and the cross-bar locking assembly 5, the lock cylinder 2 cannot rotate if any one of the assemblies is not unlocked; when the correct key 200 is inserted, a three-stage unlocking process needs to be formed, greatly improving the anti-theft performance of the lock in this case.

[0044] Specifically, as Figure 1 、 Figures 7 - 12 shown, the side bead locking assembly 4 is provided with at least two groups. The side bead locking assembly 4 includes side bead holes 41 opened on one of the left and right side walls of the lock cylinder 2, a second spring 42 installed at the bottom of the side bead holes 41, and side beads 43 installed in the side bead holes 41 and having one end abutted against the second spring 42. The upper side of the side bead 43 is provided with a first groove 431, and the lower end extends downward to be provided with a top foot 432. The key 200 is provided with a snake-shaped groove 202 that cooperates with the top foot 432.

[0045] During specific implementation, to ensure the security of the lock, the user can set three to six groups of side bead locking assemblies 4. In this case, for the convenience of production and to save production costs, preferably, the side bead locking assembly 4 is set to five groups. The top foot 432 is used to cooperate with the snake-shaped groove of the key and slide in the snake-shaped groove.

[0046] As Figure 1 、 Figures 7 - 12 shown, specifically, the cross-bar locking assembly 5 includes a cross-bar groove 51 opened on the upper side wall of the lock cylinder 2 and communicating with the side bead holes 41, a cross-bar 52 inserted into the cross-bar groove 51 and capable of radially moving in the cross-bar groove 51. The bottom of both ends of the cross-bar groove 51 is recessed to form third installation holes 53, and third springs 54 are installed in the third installation holes 53. The cross-bar 52 includes protruding portions 521 provided at both ends, and the lower ends of the protruding portions 521 at both ends are respectively abutted against the third springs 54 at both ends. The provision of the protruding portions 521 facilitates the abutment of the cross-bar 52 against the third springs 54.

[0047] As described above, according to the description of the structure of the side bead locking assembly 4 and the transverse grid locking assembly 5, when the key 200 is not inserted into the lock core 2 or an incorrect key 200 is inserted, the side bead 43 cannot be driven to move correctly, and the transverse grid 52 is in a raised state under the action of the force of the third spring and cannot descend to cooperate with the first groove 431 of the side bead, so that the lock core 2 is in a static locked state, thereby achieving locking; when the key is inserted, the top foot moves in the serpentine groove along the direction of the serpentine groove, and the side bead 43 moves in the side bead hole 41 along the serpentine groove 202 on the key 200, and when the key is finally inserted to the bottom, several first grooves 431 will be in a straight line, together forming a receiving groove for accommodating the transverse grid 52, and then the lock core 2 is rotated, and the transverse grid 52 contacts and squeezes the inner wall of the lock shell 1 so that the transverse grid 52 falls into the receiving groove, thereby causing the lock core 2 to rotate relative to the lock shell 1 and achieve unlocking. When the key 200 is pulled out, the second spring 42 drives the side ball 43 to reset so that the first grooves 431 are restored to a state where they are not in a straight line. At the same time, the third spring 52 drives the horizontal grid 52 to reset, and the two complete the locking reset.

[0048] Through the dynamic coordination of the first special-shaped bead locking component 4 and the horizontal grid locking component 5 and the spring reset mechanism, a logically rigorous three-dimensional locking and reliable reset system is constructed. This linkage mechanism of dynamic alignment, precise coordination, and automatic reset not only improves the unlocking complexity through the double verification of the trajectory of the side bead 43 and the position of the horizontal grid 52, but also ensures the stability of the locked state with the help of the rigid reset of the spring system. From the perspective of structural logic, it cuts off the cracking path of traditional locks that rely on a single motion trajectory or static engagement, and significantly enhances the uniqueness of the lock in the unlocking process and the reliability of the locked state.

[0049] Further, refer to Figure 1 , Figure 8 , Figure 9 As shown, a long groove 121 is recessed on the inner wall surface of the installation cavity 12 for limiting the horizontal grid 52 and thus limiting the rotation of the lock core 2. The cross section of the long groove 121 is arc-shaped, and an arc-shaped strip 522 matching the shape of the long groove 121 is provided on the upper end of the horizontal grid 52. In specific implementation, the arc-shaped long groove 121 facilitates the horizontal grid 52 to be squeezed out of the long groove 121 by easily rotating the lock core 2 when the correct key 200 is used.

[0050] When the lock core 2 is illegally pried open, the arc-shaped bar 522 of the transverse grid 52 forms a rigid abutment with the arc surface of the long groove 121, and the force is evenly distributed to the entire groove wall to prevent structural damage caused by single-point force; the depth of the long groove 121 matches the height of the transverse grid 52. When violently rotated, the two form a circumferential limit fit, and the transverse grid 52 cannot completely escape from the long groove 121. The lock core 2 is in a state, which can effectively prevent the lock core 100 from being illegally opened.

[0051] When the key 200 is not inserted into the lock core 2 or an incorrect key 200 is inserted, the side bead 43 cannot be driven to move correctly, and the horizontal gate 52 is in a jacked-up state under the force of the third spring 52, and cannot be lowered to cooperate with the first groove 431 of the side bead 43. It is also impossible to make a plurality of first grooves 431 be in a straight line to form a receiving groove for accommodating the horizontal gate 52. Therefore, at this time, the lock core 2 is rotated until the horizontal gate 52 is stuck in the long groove 121 on the inner wall of the lock shell 1 under the elastic force of the third spring 54. At this time, the lock core 2 cannot be rotated to prevent illegal opening. When the correct key is inserted, the horizontal gate 52 can be squeezed out of the long groove 121, and then the lower end of the horizontal gate 52 is stuck in the receiving groove formed by a plurality of first grooves 431, which will not limit the rotation of the lock core 2 and can be unlocked normally.

[0052] Reference Figure 1 , Figures 10 - 12 As shown, in this embodiment, an anti-drilling sheet 6 is inserted into the lock core 2, and the anti-drilling sheet 6 directly protects the lock core 2 to prevent criminals from using tools such as drills to penetrate the lock core 2 from the keyhole 21 to carry out illegal damage. An anti-drilling pin 7 is inserted into the lock shell 1 to protect the lock shell 1 to prevent criminals from using tools such as drills to penetrate the lock core 2 from the lock shell 1 to carry out illegal damage. By providing the anti-drilling sheet 6 and the anti-drilling pin 7, the overall anti-drilling performance of the lock core 100 is improved, and the safety is further improved. A second groove 423 is also opened upward on the upper side of the side bead 43, and the second groove 423 plays a role in preventing illegal opening and picking, and can interfere with criminals using tools to pick the side bead 43. The second groove 423 is located on the left side of the first groove 431 and its depth is lower than the depth of the first groove 431. In the conventional design state of the prior art, the lock core 100 is provided with the lock core 2 at one end, and the internal knob or tail scale and other components are provided at the other end. In specific implementation, preferably, in this embodiment, the lock shell 1 and the lock core 2 are symmetrically arranged with the dial 8 as the axis. That is, in this embodiment, the lock shell 1 is designed to be detachable on the left and right, and the lock core of this case is a double-open lock core with double lock cores 2. Lock cores 2 are arranged at both ends, and keys can be used to open the door on both sides, which is convenient to use and has a wide range of applications. Of course, in another embodiment, the lock shell 1 can also be in a non-detachable state, and the lock core 2 can still be symmetrically connected to the two sides of the dial sleeve 8. Of course, when the embodiment is a double lock core 2, it also includes all the components and structures that match the lock core 2 described above, which will not be repeated here.

[0053] As mentioned above, this case protects a lock with good anti-theft performance, and all technical solutions that are the same or similar to this case should be shown to fall within the scope of protection of this case.

Claims

1. A lock with good anti-theft performance, characterized in that: It includes a lock core (100) and a key (200). The lock core (100) includes a lock housing (1), a lock cylinder (2) installed inside the lock housing (1), and a shifting sleeve (8) installed on the lock housing (1) and connected to the lock cylinder (2). An axially penetrating keyhole (21) for inserting the key (200) is provided on the lock cylinder (2). The lock housing (1) includes a lock housing connection part (11) and an installation cavity (12) for installing the lock cylinder (2). It is characterized in that: at least two groups of obliquely staggered oblique bead locking components (3) are further provided between the lock housing (1) and the lock cylinder (2), and a key pattern hole (201) corresponding to and cooperating with the oblique bead locking component (3) is provided on the key (200); when the key (200) is not inserted into the keyhole (21) of the lock cylinder (2) or is inserted incorrectly, the front end of the oblique bead locking component (3) is pushed into the lock cylinder (2) and into the keyhole (21), thereby realizing locking; when the key (200) is gradually inserted into the lock cylinder (2) along the keyhole (21), the oblique bead locking component (3) is pushed into the corresponding key pattern hole (201) by the key (200). At this time, turning the key (200) can drive the lock cylinder (2) to rotate to realize unlocking.

2. A lock with good anti-theft performance according to claim 1, characterized in that: The oblique bead locking component (3) includes a first spring (31), a flat bead (32) abutted against the upper end of the first spring (31), and a main ball (33) abutted against the upper end of the flat bead (32). First installation holes (111) obliquely staggered and communicating with the installation cavity (12) are provided on the lock housing connection part (11). Second installation holes (22) obliquely staggered and communicating with the keyhole (21) are provided on the lock cylinder (2). The first spring (31) and the flat bead (32) are installed in the first installation hole (111). The main ball (33) is installed in the second installation hole (22) in a limited way. The first installation hole (111) and the second installation hole (22) are coaxially communicated. The diameter of the first installation hole (111) is the same as the lower end diameter of the second installation hole (22). The diameter of the flat bead (32) is the same as the lower end diameter of the main ball (33).

3. A lock with good anti-theft performance according to claim 2, characterized in that: The second installation hole (22) includes a limiting hole (221) and a movable hole (222). The diameter of the limiting hole (221) is larger than the diameter of the movable hole (222), so that a limiting inner ring (223) is formed at the connection between the two. The main ball (33) is bullet-shaped. The main ball (33) includes a limiting end (331) movably arranged in the limiting hole (221) and a movable end (332) movably arranged in the movable hole (222). A limiting outer ring (333) is formed at the connection between the limiting end (331) and the movable end (332).

4. A lock with good anti-theft performance according to claim 1, characterized in that: The oblique bead locking component (3) is provided with three to six groups, and correspondingly three to six key pattern holes (201) are provided.

5. A lock with good anti-theft performance according to claim 1, characterized in that: The orifice diameter and the depth of each key pattern hole (201) are different.

6. A lock with good anti-theft performance according to any one of claims 1-5, characterized in that: The lock core (100) further includes a side bead locking assembly (4) and a cross-bar locking assembly (5) that cooperates with the side bead locking assembly (4) to lock the lock cylinder (2). When no key (200) is inserted into the lock cylinder (2) or the inserted key (200) is incorrect, both the side bead locking assembly (4) and the cross-bar locking assembly (5) are in a locked state. When the correct key (200) is inserted into the lock cylinder (2), it drives the side bead locking assembly (4) to move, thereby unlocking the cross-bar locking assembly (5) to achieve unlocking.

7. The lock with good anti-theft performance according to claim 6, characterized in that: At least two groups of the side bead locking assemblies (4) are provided. The side bead locking assembly (4) includes side bead holes (41) opened on one of the left and right side walls of the lock cylinder (2), a second spring (42) installed at the bottom of the side bead holes (41), and side beads (43) installed in the side bead holes (41) and having one end abutted against the second spring (42). An upper side of the side bead (43) is provided with a first groove (431) opening upward, and a lower end thereof extends downward to be provided with a top foot (432). The key (200) is provided with a snake-shaped groove (202) that cooperates with the top foot (432).

8. A lock with good anti-theft performance according to claim 7, characterized in that: The cross-bar locking assembly (5) includes a cross-bar groove (51) opened on the upper side wall of the lock cylinder (2) and communicating with the side bead holes (41), and a cross-bar (52) inserted into the cross-bar groove (51) and capable of moving radially in the cross-bar groove (51). The bottom of both ends of the cross-bar groove (51) is recessed to form third mounting holes (53), and third springs (54) are installed in the third mounting holes (53). The cross-bar (52) includes extending portions (521) provided at both ends thereof, and the lower ends of the extending portions (521) at both ends respectively abut against the third springs (54) at both ends.

9. A lock with good anti-theft performance according to claim 8, characterized in that: An inner wall surface of the installation cavity (12) is recessed to form a long groove (121) for limiting the rotation of the lock cylinder (2) by limiting the cross-bar (52). The cross-section of the long groove (121) is arc-shaped, and an upper end of the cross-bar (52) is provided with an arc-shaped strip (522) adapted to the shape of the long groove (121).

10. A lock with good anti-theft performance according to claim 9, characterized in that: An anti-drilling piece (6) is inserted into the lock cylinder (2), and an anti-drilling pin (7) is inserted into the lock shell (1). An upper side of the side bead (43) is further provided with a second groove (423), and the second groove (423) is located on the left side of the first groove (431) and has a depth lower than that of the first groove (431).

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