Lock locked through combination of various bead bodies

Abstract

The invention relates to a lock locked by combination of various beads, which comprises a lock cylinder and a key, the lock cylinder comprises a lock shell, a lock liner mounted in the lock shell and a shifting sleeve mounted on the lock shell and connected with the lock liner, a key hole is formed in the lock liner, the lock shell comprises a lock shell connecting part and a mounting cavity for mounting the lock liner, and the key hole is formed in the lock shell. A main marble locking assembly is arranged between the lock shell and the lock container, a first special-shaped bead locking assembly is arranged on the right side of the lock container, a transverse grid locking assembly matched with the first special-shaped bead locking assembly to lock the lock container is arranged on the upper side of the lock container, and a second special-shaped bead locking assembly for locking the lock container is arranged on the left side of the lock container. The key is provided with a first tooth hole correspondingly matched with the main marble locking assembly, a snakelike groove correspondingly matched with the first special-shaped bead locking assembly and a second tooth hole correspondingly matched with the second special-shaped bead locking assembly. Complex composite unlocking logic is formed through cooperation of the four locking assemblies, so that four independent locking points need to be cracked at the same time during illegal unlocking.

Description

Technical Field

[0001] The present invention relates to the field of locks, and in particular to a lock capable of locking with a combination of multiple beads. Background Art

[0002] In the field of mechanical locks, the lock core is the core component to ensure security, and its anti-theft structure design has always been the focus of the industry. However, the existing lock cores have the following main shortcomings:

[0003] The earliest lock cores were made of a single type of beads, such as floating beads, side beads, and marbles. Although they were widely used due to their simple structure and easy assembly, the internal structure of the lock core was highly regular, making it easy for criminals to crack it using technical means with the help of professional tools. In addition, the correspondence between the key tooth shape and the bead structure was simple, making it difficult to copy, making it difficult to meet the increasing security protection needs.

[0004] To further enhance anti-theft performance, lock cylinders were subsequently manufactured using a combination of two types of beads, such as side beads and marbles, or side beads and floating beads. These solutions increased the complexity of unlocking by placing different beads in different positions on the cylinder and using different motion patterns. However, these locking structures still suffered from a high degree of regularity in their motion trajectory, and the risk of unauthorized opening remained largely unresolved.

[0005] Therefore, how to overcome the above-mentioned defects and provide a lock with better anti-theft performance by forming a three-dimensional anti-theft system through the cooperation of multiple beads has become an important issue to be solved urgently by those skilled in the art. Summary of the Invention

[0006] The present invention overcomes the shortcomings of the above-mentioned technology and provides a lock capable of locking with a combination of multiple beads.

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

[0008] A lock with multiple bead combination locking, including a lock core and a key, the lock core including a lock shell, a lock core installed in the lock shell, and a dial sleeve installed on the lock shell and connected to the lock core, the lock core is provided with a keyhole, the lock shell includes a lock shell connecting part and an installation cavity for installing the lock core, a main marble locking assembly is provided between the lock shell and the lock core, a first special-shaped bead locking assembly is provided on the right side of the lock core, a transverse grid locking assembly is provided on the upper side of the lock core to cooperate with the first special-shaped bead locking assembly to lock the lock core, and a second special-shaped bead locking assembly is provided on the left side of the lock core to lock the lock core, and the key is provided with a first tooth flower hole corresponding to the main marble locking assembly, a second tooth flower hole corresponding to the second special-shaped bead locking assembly A serpentine groove corresponding to a special-shaped bead locking component and a second tooth hole corresponding to a second special-shaped bead locking component; when the key is not inserted or the key is inserted incorrectly, the front end of the main marble locking component and the second special-shaped bead locking component are pushed into the lock core and the keyhole, and at the same time the first special-shaped bead locking component and the cross-grid locking component are in a locked state, thereby achieving locking; when the correct key is inserted, the main marble locking component is pushed into the corresponding first tooth hole, and the second special-shaped bead locking component is pushed into the corresponding second tooth hole, and the lower end of the first special-shaped bead locking component moves along the serpentine groove to unlock the cross-grid locking component. At this time, turning the key can drive the lock core to rotate to achieve unlocking.

[0009] Furthermore, the main marble locking assembly includes a first spring, a flat ball abutting the upper end of the first spring, and a main marble abutting the upper end of the flat ball. A first mounting hole communicating with the mounting cavity is provided on the lock shell connecting part, and a second mounting hole communicating with the keyhole is provided on the lock core. The first spring and the flat ball are installed in the first mounting hole, and the main marble is limitedly installed in the second mounting hole. The first mounting hole is coaxially connected to the second mounting hole, the diameter of the first mounting hole is the same as the diameter of the lower end of the second mounting hole, and the diameter of the flat ball is the same as the diameter of the lower end of the main marble.

[0010] Furthermore, the second mounting hole includes a limiting hole and a movable hole, the diameter of the limiting hole is larger than the diameter of the movable hole, thereby forming a limiting inner ring at the connection between the two, the main marble is in the shape of a bullet head, and the main marble includes a limiting end movably set in the limiting hole and a movable end movably set in the movable hole, and the connection between the limiting end and the movable end forms a limiting outer ring.

[0011] Furthermore, the first special-shaped bead locking assembly includes a side bead hole provided on the side wall of the left end 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 the second spring at one end. The side bead is in the shape of a long tubular rectangle, with a first groove provided on the upper side of the side bead facing upward and a top foot extending downward from the lower end to correspond to the serpentine groove. After removing the top foot, the side bead is in the shape of a rectangular parallelepiped with one end tilted.

[0012] 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 both ends thereof, and the lower ends of the extension portions at both ends respectively abut against the third springs at both ends.

[0013] Furthermore, a first 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 first long groove is arc-shaped, and the upper end of the horizontal grid is provided with an arc-shaped bar that is adapted to the shape of the first long groove.

[0014] Furthermore, the second special-shaped bead locking assembly includes a countersunk hole opened on the side wall of the right end of the lock core, a fourth spring installed in the countersunk hole, and a mushroom bead installed in the countersunk hole, the mushroom bead includes a head and a rod, the fourth spring is sleeved on the rod of the mushroom bead, the countersunk hole is connected to the keyhole, the countersunk hole includes an inner hole and an outer hole, the other end of the fourth spring abuts against the wall surface of the bottom of the outer hole, and the rod of the mushroom bead passes through the inner hole and enters the keyhole.

[0015] Furthermore, the rod portion includes a limiting flange that cooperates with the wall surface of the bottom of the outer hole to prevent the rod portion from excessively extending into the keyhole; the inner wall surface of the installation cavity is also recessed with a second long groove for limiting the mushroom bead and thereby limiting the rotation of the lock core, and the cross-section of the second long groove is an arc shape that is adapted to the head of the mushroom bead.

[0016] Furthermore, there are at least two countersunk holes, and the number of mushroom beads to be installed is less than the number of countersunk holes.

[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 on the upper side of the side bead, which is located on the left side of the first groove and has a depth lower than that of the first groove.

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

[0019] This design utilizes an axial main ball locking assembly, bilateral first and second shaped ball locking assemblies, and a circumferentially limited horizontal bar locking assembly to form a three-dimensional locking system in the radial, lateral, and circumferential directions. This ensures that unauthorized opening requires the simultaneous decryption of four independent locking points. In practice, the combined coding design of the depth of the key's first and second tooth holes and the serpentine groove trajectory prevents conventional key duplication devices from acquiring the three-dimensional coded data, significantly improving the difficulty of technical opening and its anti-cloning capabilities. Furthermore, the linkage design of the first shaped ball locking assembly and the horizontal bar enhances anti-theft performance and increases the difficulty of technical opening. Furthermore, the locking systems and motion trajectories of each component are independent yet coordinated, preventing the entire system from being unlocked due to failure of a single component, thus improving system reliability. Furthermore, the spiral trajectory of the serpentine groove provides a gradual change in resistance when the correct key is inserted, allowing users to sense the unlocking process through feel. The interlocking structure between the horizontal bar and the lock housing is concealed on the upper side of the lock core, inaccessible from the outside. Forced picking requires destroying the multi-layer structure, achieving a comprehensive improvement in three-dimensional anti-theft performance, operational experience, and resistance to violent vandalism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded view of the overall structure of the lock core and a schematic diagram of the key structure.

[0021] Figure 2 This is the main view after the key in this case is inserted into the lock cylinder.

[0022] Figure 3 This case Figure 2 Section view in the AA direction.

[0023] Figure 4 This is a top view of the key after it is inserted into the lock cylinder.

[0024] Figure 5 This case Figure 4 Cross-sectional view in the middle BB direction.

[0025] Figure 6 It is a structural diagram of the lock case in this case.

[0026] Figure 7 This is one of the structural diagrams of the lock core in this case.

[0027] Figure 8 This is the second structural diagram of the lock core in this case.

[0028] Figure 9 It is a structural diagram of the key in this case.

[0029] Figure 10 It is a structural diagram of the assembled state of the main marble locking component in this case.

[0030] Figure 11It is a structural diagram of the side bead and spring combination state in this case.

[0031] Figure 12 It is a structural diagram of the mushroom bead and spring combination state in this case. DETAILED DESCRIPTION

[0032] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0033] For ease of description and understanding, for the descriptions related to positional relationships such as front, back, up, down, left, right, outside, and inside in this case, please refer to the orientations shown in the accompanying drawings.

[0034] like Figures 1 to 12As shown, the present invention provides a lock with a combination of multiple beads, including a lock core 100 and a key 200. The lock core 100 includes a lock shell 1, a lock core 2 installed in the lock shell 1, and a dial sleeve 3 installed on the lock shell 1 and connected to the lock core 2. A keyhole 21 is provided on the lock core 2. The lock shell 1 includes a lock shell connecting portion 11 and an installation cavity 12 for installing the lock core 2. A main marble locking assembly 3 is provided between the lock shell 1 and the lock core 2. In specific implementation, the main marble locking assembly 3 is axially arranged between the lock shell 1 and the lock core 2, and cooperates with the first tooth hole 201 of the key to control the basic locking of the radial rotation of the lock core. A first special-shaped bead locking assembly 4 is provided on the right side of the lock core 2, and a transverse grid locking assembly 5 is provided on the upper side of the lock core 2 to cooperate with the first special-shaped bead locking assembly 4 to lock the lock core 2. The horizontal grid locking assembly 5 is arranged horizontally on the upper side of the lock core and is coupled to the motion trajectory of the first shaped bead 4. It is unlocked only when the first shaped bead moves along a specific path in the serpentine groove 202, forming the final barrier to circumferential rotation. A second shaped bead locking assembly 6 is provided on the left side of the lock core 2 to lock the lock core 2. The first shaped bead locking assembly 4 and the second shaped bead locking assembly 6 are located on the right and left sides of the lock core, respectively, and engage the lock housing 1 through lateral movement. The first shaped bead 4 and the horizontal grid locking assembly 5 are linked to form a two-dimensional constraint of lateral locking and circumferential engagement. The key 200 is provided with a first threaded hole 201 corresponding to the main ball locking assembly 3, a serpentine groove 202 corresponding to the first shaped bead locking assembly 4, and a second threaded hole 203 corresponding to the second shaped bead locking assembly 6. The key 200, through the composite structure of the asymmetric first tooth hole 201, the serpentine groove 202, and the second tooth hole 203, synchronously triggers the three-dimensional locking assembly. All three are indispensable, increasing the difficulty of illegal opening, improving the anti-theft performance, and increasing the difficulty of key duplication. When the key 200 is not inserted or the key 200 is inserted incorrectly, the front end of the main marble locking assembly 3 and the second special-shaped bead locking assembly 6 push into the lock core 2 and into the keyhole 21, while the first special-shaped bead locking assembly 4 and the crossbar locking assembly 5 are in a locked state, thereby achieving locking. When the correct key is inserted, the main marble locking assembly 3 is pushed into the corresponding first tooth hole 201, and the second special-shaped bead locking assembly 6 is pushed into the corresponding second tooth hole 203. The lower end of the first special-shaped bead locking assembly 4 moves along the serpentine groove 202, thereby unlocking the crossbar locking assembly 5. At this time, turning the key 200 can drive the lock core 2 to rotate and unlock.

[0035] As described above, this solution breaks through the limitations of traditional lock cores that rely on single-dimensional locking through the three-dimensional locking of the three-dimensional bead body and the horizontal grid locking component 5 and the composite key coding, and achieves a significant improvement in anti-theft performance through the structural coordination of multiple components in space. The main marble locking component 3, the first special-shaped bead locking component 4, the second special-shaped bead locking component 6 and the horizontal grid locking component 5 respectively form a three-dimensional surround on the lock core 2 from the axial, right side, left side and circumferential direction, and the four locking components constitute a three-dimensional four-directional composite locking system. The key 200 needs to be triggered by the first tooth hole 201, the serpentine groove 202, and the second tooth hole 203 respectively to unlock the main marble locking component 3, the first special-shaped bead locking component 4, and the second special-shaped bead locking component 6, forming a complex composite unlocking logic, so that illegal opening requires simultaneously cracking four independent locking points and matching the three-dimensional key coding. Compared with the traditional single or double bead structure, it significantly increases the complexity of technical opening and the difficulty of key duplication. At the same time, the four locking components achieve self-consistent verification of motion logic through spatial layout. For example, the unlocking of the horizontal gate strictly depends on the correct trajectory of the first special-shaped bead, avoiding locking failure caused by failure of a single component. A highly reliable three-dimensional anti-theft system is constructed from the dual dimensions of structural coordination and logic verification.

[0036] Specifically, if Figure 1-7 、 Figure 9 、 Figure 10As shown, the main marble locking assembly 3 of this case includes a first spring 31, a flat ball 32 abutting against the upper end of the first spring 31, and a main marble 33 abutting against the upper end of the flat ball 32. In specific implementation, the first spring 31 is a spiral compression spring, which ensures that the flat ball 32 is always pushed upward, provides continuous elastic force, drives the flat ball 32 to move upward, and indirectly pushes the main marble 33 into the locked position. Through the linkage of the first spring 31, the flat ball 32 and the main marble 33, the locking state is guaranteed to be reliable under stable elastic force output, avoiding accidental unlocking due to vibration or external force. A first mounting hole 111 connected to the mounting cavity 12 is provided on the lock shell connecting part 11, and a second mounting hole 22 connected to the keyhole 21 is provided on the lock core 2. The first spring 31 and the flat ball 32 are installed in the first mounting hole 111, and the main marble 33 is limitedly installed in the second mounting hole 22. The first mounting hole 111 and the second mounting hole 22 are used to provide a motion trajectory for the main marble locking assembly 3 to ensure stable operation. During specific implementation, the first mounting hole 111 and the second mounting hole 22 can be inclined relative to the lock shell 1 and the lock core 2, or they can be vertical. In this case, preferably, the first mounting hole 111 and the second mounting hole 22 are respectively arranged obliquely and staggered. In this way, the first mounting hole 111 and the second mounting hole 22 can jointly provide an oblique motion trajectory for the main marble locking assembly 3, so that the movement direction of the flat ball 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 main marble locking assemblies 3 at the same time. The first mounting hole 111 is coaxially connected to the second mounting hole 22. This coaxial connection design can effectively ensure the installation accuracy of the main marble locking assembly 3 and avoid jamming caused by hole position deviation. The diameter of the first mounting hole 111 is the same as the diameter of the lower end of the second mounting hole 22, and the diameter of the flat ball 32 is the same as the diameter of the lower end of the main marble 33. 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. Its lower end can extend into the first mounting hole 111, and the flat marble 32 can extend upward into the second mounting hole 22.

[0037] In practice, the main marble lock assembly 3 is preferably provided with five groups. Of course, to consider production costs and anti-theft performance, the number can also be more or less. To achieve better anti-theft performance with the main marble lock assembly 3, in practice, the aperture diameter and hole depth of each first thread hole 201 are different. Because the differentiated design of each first thread hole 201 breaks the regular coding of the equidistant and equal-depth threads of the traditional lock core, it forms an irregular random coding, which is difficult for criminals to crack through trial and error, increasing the difficulty of technical opening. This also makes it more difficult to copy the key 200, because key copying requires obtaining the diameter and depth parameters of all thread holes at the same time, cutting off the illegal copying path at the source. On the other hand, the first thread holes 201 of different depths require different forces and strokes when the key 200 is inserted. When a non-matching key 200 is inserted, due to diameter or depth deviations, it is impossible to accurately press down all the main marbles 33, causing the lock core 2 and the lock housing 1 to remain stuck, forming a clear stuck feedback, reminding the user of abnormal operation; it also makes non-technical opening more difficult.

[0038] Continue to refer to Figure 1-7 、 Figure 9 、 Figure 10 As shown, further, 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 the diameter of the movable hole 222, thereby forming a limiting inner ring 223 at the connection between the two. In a specific implementation, the main marble 33 is in the shape of a bullet head, that is, the movable end 332 of the main marble 33 is the tip of the bullet head. The bullet-shaped movable end 332 reduces the contact area with the keyhole 21, increasing the difficulty of applying force with illegal tools. The main marble 33 includes a limiting end 331 movably set in the limiting hole 221 and a movable end 332 movably set in the movable hole 222. The connection between the limiting end 331 and the movable end 332 forms a limiting outer ring 333. In a specific implementation, the diameter of the first mounting hole 111 is the same as the diameter of the limiting hole 221 of the second mounting hole 22, and the diameter of the flat ball 32 is the same as the diameter of the limiting end of the main marble 33. The inner limiting ring 223 cooperates with the outer limiting ring 333 to precisely limit the axial displacement range of the main marble 33, improving the accuracy of the lock's unlocking and locking. The travel of the main marble 33 is strictly limited within a safe range, preventing excessive ejection of the main marble 33 due to excessive force from the first spring 31 or complete retraction of the main marble 33 due to external impact. This ensures that the movable end 332 of the main marble 33 always maintains a fixed extension length when the lock cylinder 100 is locked, thereby enhancing the stability of the lock.

[0039] Furthermore, in order to ensure good anti-theft performance while ensuring that there is no overly complicated production and assembly process, in specific implementation, the main marble locking assembly 3 is provided with three to six groups, and the tooth holes 201 are correspondingly provided with three to six groups. In this case, preferably, the main marble locking assembly 3 is provided with five groups, and the tooth holes 201 are correspondingly provided with five groups. Providing more main marble locking assemblies 3 and tooth holes 201 corresponds to more different unlocking structures, which increases the difficulty of unlocking. Multiple groups of main marble locking assemblies 3 are simultaneously clamped to the lock core 2 and the lock shell 1. When illegally opening, the locks of all groups need to be released at the same time. Single-directional tools cannot accomplish this, and the technical difficulty of opening increases exponentially.

[0040] like Figure 1-Figure 5 、 Figure 7 、 Figure 9 、 Figure 11 As shown, specifically, the first special-shaped bead locking assembly 4 includes a side bead hole 41 provided on the side wall of the left end of the lock core 2, a second spring 42 installed at the bottom of the side bead hole 41, and a side bead 43 installed in the side bead hole 41 and abutting against the second spring 42 at one end. The upper side of the side bead 43 is provided with a first groove 431 facing upward, and the lower end is provided with a top foot 432 extending downward to correspond to the serpentine groove 202. In specific implementation, the top foot 432 is used to cooperate with the serpentine groove of the key and slide in the serpentine groove. After removing the top foot 432, the side bead 43 is in the shape of a rectangular parallelepiped with one end tilted. Please refer to the following for details. Figure 11 For reference, its front end is tilted to facilitate installation in the lock core 2. Of course, the shape of the bottom of the side bead hole 41 is also a matching tilted shape to ensure the stable movement of the side bead 43 and accurate positioning. During specific implementation, in order to ensure the safety of the lock, the user can set three to six groups of the first special-shaped bead locking assembly 4. In this case, in order to facilitate production, save production costs and ensure good anti-theft performance, it is preferred to lock the first special-shaped bead assembly 4. The first special-shaped bead locking assembly 4 is preferably provided with five groups. Of course, in order to consider production costs and anti-theft performance, it can also be a greater or lesser number. The special-shaped side bead 43 structure of this case is different from the common side bead structure on the market, which increases the anti-theft performance, improves the technical opening difficulty, and increases the difficulty of key copying.

[0041] like Figures 1-6 As shown, the horizontal bar locking assembly 5 specifically includes a horizontal bar groove 51 formed on the upper sidewall of the lock core 2 and communicating with the side bead hole 41. A horizontal bar 52 is inserted into the horizontal bar groove 51 and is radially movable within the horizontal bar groove 51. Third mounting holes 53 are recessed at the bottom of each end of the horizontal bar groove 51, and a third spring 54 is mounted in each of the third mounting holes 53. The horizontal bar 52 includes extensions 521 at each end, the lower ends of which abut against the third springs 54 at either end. The provision of the extensions 521 facilitates the abutment between the horizontal bar 52 and the third spring 54.

[0042] As described above, according to the description of the structure of the first special-shaped 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. 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. Then the lock core 2 is rotated, and the transverse grid 52 contacts and squeezes the inner wall of the lock shell 1, causing the transverse grid 52 to fall 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 return to a state of not being in a straight line. At the same time, the third spring 52 drives the horizontal gate 52 to reset, and the two complete the locking reset. As described above, according to the description of the structure of the first special-shaped 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. 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. Then the lock core 2 is rotated, and the transverse grid 52 contacts and squeezes the inner wall of the lock shell 1, causing the transverse grid 52 to fall 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 removed, the second spring 42 drives the side bead 43 to reset, causing the first grooves 431 to return to a non-aligned state. Simultaneously, the third spring 52 drives the horizontal bar 52 to reset, and the two complete the lock reset. Through the dynamic coordination of the first special-shaped bead locking assembly 4 and the horizontal bar locking assembly 5, and the spring reset mechanism, a logically rigorous three-dimensional locking and reliable reset system is constructed. This dynamic alignment, precise coordination, and automatic reset linkage mechanism not only increases the unlocking complexity through the dual verification of the trajectory of the side bead 43 and the position of the horizontal bar 52, but also ensures the stability of the locked state through the rigid reset of the spring system. This structural logic eliminates the cracking path of traditional locks that rely on a single motion trajectory or static engagement, significantly enhancing the uniqueness of the lock during the unlocking process and the reliability of the locked state.

[0043] Further, continue to refer to Figures 1-6As shown, a first elongated slot 121 is recessed into the inner wall of the mounting cavity 12 to limit the position of the horizontal gate 52 and thus the rotation of the lock core 2. The first elongated slot 121 has an arcuate cross-section, and an arcuate strip 522 is provided at the upper end of the horizontal gate 52 to match the shape of the first elongated slot 121. In practice, the arcuate slot 121 facilitates the extrusion of the horizontal gate 52 from the lock core 2 by easily rotating the lock core 2 when the correct key 200 is used.

[0044] When the lock core 2 is illegally pried open, the arc-shaped bar 522 of the horizontal 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, preventing structural damage caused by single-point force; the depth of the long groove 121 matches the height of the horizontal grid 52. When violently rotated, the two form a circumferential limit fit, and the horizontal 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.

[0045] 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. The crossbar 52 is in an upward position due to 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 the multiple first grooves 431 be in a straight line to form a receiving groove for accommodating the crossbar 52. Therefore, at this time, the lock core 2 is rotated until the crossbar 52 is stuck in the long groove 121 on the inner wall of the lock case 1 under the elastic force of the third spring 54. At this time, the lock core 2 cannot be rotated, preventing illegal opening. When the correct key is inserted, the crossbar 52 can be squeezed out of the long groove 121, and then the lower end of the crossbar 52 is stuck in the receiving groove formed by the multiple first grooves 431. It does not restrict the rotation of the lock core 2 and can be unlocked normally.

[0046] like Figure 1-Figure 5 、 Figure 8 、 Figure 9 、 Figure 12 As shown, specifically, the second special-shaped bead locking assembly 6 of this case includes a countersunk hole 61 opened on the right side wall of the lock core 2, a fourth spring 62 installed in the countersunk hole 61, and a mushroom bead 63 installed in the countersunk hole 61. The name of the mushroom bead is for the convenience of description and understanding. Figure 12As can be seen, the shape of the mushroom bead resembles a common edible mushroom. This unique shape further enhances the lock's anti-theft performance and the difficulty of key duplication. The mushroom bead 63 comprises a head 631 and a stem 632. A fourth spring 62 is sleeved onto the stem 632 of the mushroom bead 63. The countersunk hole 61 communicates with the keyhole 21, allowing the stem 632 to enter the keyhole 21 and lock the lock core 2. One end of the fourth spring 62 abuts the head 631 of the mushroom bead, while the other end abuts the wall 613 at the bottom of the outer hole 612. This spring provides an elastic thrust toward the keyhole 21, ensuring that the stem 632 stably extends into the keyhole 21 and locks the lock core 2 even when no key is inserted. This ensures the lock is stable and secure, and ensures automatic reset after the key 200 is removed. The countersunk hole 61 comprises an inner hole 611 and an outer hole 612. The stem 632 of the mushroom bead 63 extends through the inner hole 611 and into the keyhole 21. The countersunk hole 61 serves as a mounting carrier, and its inner hole 611 has a diameter smaller than that of the outer hole 612, wherein the inner hole 611 is connected to the keyhole 21, allowing the stem 632632 of the mushroom bead 63 to extend into the keyhole 21 to lock the lock core 2; the outer hole 612 has a larger diameter and is used to accommodate the mushroom bead head 631 and the fourth spring 62, and the bottom wall 613 of the hole provides abutment support for the spring to ensure effective elastic energy storage and recovery. In specific implementation, the second tooth hole 203 is opened on the two side walls of the key. The unlocking process of the second special-shaped bead locking assembly 6 is briefly described. Under normal circumstances, the stem 632 of the mushroom bead 63 extends into the keyhole 21 of the lock core 2. When the key 200 is gradually inserted, the stem 632 of the mushroom bead 63 gradually gets stuck in the corresponding second tooth hole on the side wall of the key 200, thereby unlocking. In specific implementation, the hole diameter and hole depth of each second thread hole 203 are different. For descriptions of their structure, function, effect and working principle, please refer to the corresponding description of the first thread hole 201 in the previous text, which will not be repeated here.

[0047] Further, continue to refer to Figure 1-Figure 5 、 Figure 8 、 Figure 9 、 Figure 12As shown, the rod portion 632 includes a retaining flange 6321 that engages with the wall surface at the bottom of the outer hole 612 to prevent the rod portion 632 from over-extending into the keyhole 21. This prevents the rod portion 632 from over-extending into the keyhole of the lock core 2, thereby preventing unlocking. The structure, function, effect, and operating principle of the retaining flange 6321 are described in the previous description regarding the retaining engagement between the main pin 33 and the second mounting hole 22, and are not repeated here. A second elongated groove 122 is also recessed on the inner wall of the mounting cavity 12 to retain the pin 63 and thus limit rotation of the lock core 2. The cross-section of the second elongated groove 122 is arc-shaped and matches the head 631 of the pin 63. The structure, function, effect, and operating principle of the second elongated groove 122 and the head 631 of the pin 63 are described in the previous description regarding the retaining engagement between the horizontal bar 52 and the first elongated groove 121, and are not repeated here.

[0048] Furthermore, at least two countersunk holes 61 are provided, and the number of mushroom beads 63 installed is less than the number of countersunk holes 61. In this case, preferably, there are five countersunk holes 61, two of which are installed with the fourth spring 62 and mushroom beads 63. In this way, the user can choose to selectively install the two fourth springs 62 and mushroom beads 63 in different of the five countersunk holes 61, thereby increasing the security of theft, making it more difficult to copy the key, and enhancing the anti-theft performance of the lock, and improving the anti-technical opening effect. It should be noted that at this time, the second tooth holes 203 on the key are also provided with two.

[0049] Reference Figure 1-Figure 5As shown, in this embodiment, an anti-drill plate 6 is inserted into the lock core 2. The anti-drill plate 6 directly protects the lock core 2 and prevents criminals from using tools such as drills to penetrate the lock core 2 from the keyhole 21 to illegally damage it. An anti-drill pin 7 is inserted into the lock shell 1 to protect the lock shell 1 and prevent criminals from using tools such as drills to penetrate the lock core 2 from the lock shell 1 to illegally damage it. By providing the anti-drill plate 6 and the anti-drill pin 7, the overall anti-drill performance of the lock core 100 is improved, further enhancing security. A second groove 423 is also provided on the upper side of the side bead 43. The second groove 423 serves to prevent illegal opening by picking or removing the side bead 43, and can interfere with criminals using tools to remove the side bead 43. The second groove 423 is located to the left of the first groove 431 and its depth is less than the depth of the first groove 431. Under conventional design conditions in the prior art, the lock core 100 is provided with the lock core 2 at one end and an internal knob or tail scale component is provided at the other end. In specific implementation, preferably, in this embodiment, the lock housing 1 and the lock cylinder 2 are symmetrically arranged with the dial 8 as the axis. That is, in this embodiment, the lock housing 1 is designed to be detachable on both sides, and the lock cylinder in this case is a double-opening lock cylinder with a double lock cylinder 2. The lock cylinder 2 is provided at both ends, and the door can be opened with a key on both sides, which is convenient to use and has a wide range of applications. Of course, in another embodiment, the lock housing 1 can also be in a non-detachable state, and the lock cylinder 2 can still be symmetrically connected to the dial sleeve 8 on both sides. Of course, when the embodiment is a double lock cylinder 2, it also includes all the components and necessary structures that match the lock cylinder 2 described above, and will not be repeated here.

[0050] As mentioned above, this case protects a lock that is locked with a combination of multiple beads. All technical solutions that are the same or similar to this case should be deemed to fall within the scope of protection of this case.

Claims

1. A lock with a combination of multiple beads, comprising a lock core (100) and a key (200), wherein the lock core (100) comprises a lock housing (1), a lock core (2) mounted in the lock housing (1), and a dial sleeve (3) mounted on the lock housing (1) and connected to the lock core (2), wherein a keyhole (21) is provided on the lock core (2), and the lock housing (1) comprises a lock housing connecting portion (11) and an installation cavity (12) for installing the lock core (2), characterized in that: A main marble locking assembly (3) is provided between the lock housing (1) and the lock core (2); a first special-shaped bead locking assembly (4) is provided on the right side of the lock core (2); a horizontal grid locking assembly (5) is provided on the upper side of the lock core (2) for cooperating with the first special-shaped bead locking assembly (4) to lock the lock core (2); a second special-shaped bead locking assembly (6) is provided on the left side of the lock core (2) for locking the lock core (2); a first tooth hole (201) corresponding to the main marble locking assembly (3), a serpentine groove (202) corresponding to the first special-shaped bead locking assembly (4) and a second tooth hole (203) corresponding to the second special-shaped bead locking assembly (6) are provided on the key (200); when the key is not inserted, the lock core (200) is locked. (200) or when the key (200) is inserted incorrectly, the front end of the main marble locking assembly (3) and the second special-shaped bead locking assembly (6) are pushed into the lock core (2) and the key hole (21), and at the same time, the first special-shaped bead locking assembly (4) and the horizontal grid locking assembly (5) are in a locked state, thereby achieving locking; when the correct key is inserted, the main marble locking assembly (3) is pushed into the corresponding first tooth hole (201), and the second special-shaped bead locking assembly (6) is pushed into the corresponding second tooth hole (203), and the lower end of the first special-shaped bead locking assembly (4) moves along the serpentine groove (202) to unlock the horizontal grid locking assembly (5), and at this time, turning the key (200) can drive the lock core (2) to rotate to achieve unlocking.

2. The lock with multiple beads combined locking according to claim 1, characterized in that: The main marble locking assembly (3) comprises a first spring (31), a flat ball (32) abutting against the upper end of the first spring (31), and a main marble (33) abutting against the upper end of the flat ball (32); a first mounting hole (111) communicating with the mounting cavity (12) is provided on the lock shell connecting portion (11); a second mounting hole (22) communicating with the keyhole (21) is provided on the lock core (2); the first spring (31) and the flat ball (32) are installed in the first mounting hole (111); the main marble (33) is limitedly installed in the second mounting hole (22); the first mounting hole (111) is coaxially connected to the second mounting hole (22); the diameter of the first mounting hole (111) is the same as the diameter of the lower end of the second mounting hole (22); the diameter of the flat ball (32) is the same as the diameter of the lower end of the main marble (33).

3. The lock with multiple beads combined locking according to claim 2, characterized in that: 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 the diameter of the movable hole (222), thereby forming a limiting inner ring (223) at the connection between the two; the main marble (33) is in the shape of a bullet head; the main marble (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); the connection between the limiting end (331) and the movable end (332) forms a limiting outer ring (333).

4. The lock with multiple beads combined locking according to claim 1, characterized in that: The first special-shaped bead locking assembly (4) comprises a side bead hole (41) provided on the side wall of the left end of the lock core (2), a second spring (42) installed at the bottom of the side bead hole (41), and a side bead (43) installed in the side bead hole (41) and abutting against the second spring (42) at one end. The upper side of the side bead (43) is provided with a first groove (431) facing upward, and the lower end is provided with a top foot (432) extending downward and corresponding to the serpentine groove (202). After removing the top foot (432), the side bead (43) is in the shape of a rectangular parallelepiped with one end tilted.

5. The lock with multiple beads combined locking according to claim 4, characterized in that: The horizontal grid locking assembly (5) includes a horizontal grid groove (51) provided on the side wall of the upper end of the lock core (2) and connected to the side bead hole (41), a horizontal grid (52) inserted in the horizontal grid groove (51) and capable of radially moving in the horizontal grid groove (51), a third mounting hole (53) is provided at the bottom of both ends of the horizontal grid groove (51), a third spring (54) is installed in the third mounting hole (53), and the horizontal grid (52) includes an extension portion (521) provided at both ends thereof, and the lower ends of the extension portions (521) at both ends respectively abut against the third springs (54) at both ends.

6. The lock with multiple beads combined locking according to claim 5, characterized in that: A first 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 first long groove (121) is arc-shaped, and an arc-shaped strip (522) that matches the shape of the first long groove (121) is provided at the upper end of the horizontal grid (52).

7. The lock with multiple beads combined locking according to claim 1, characterized in that: The second special-shaped bead locking assembly (6) includes a countersunk hole (61) opened on the right end side wall of the lock core (2), a fourth spring (62) installed in the countersunk hole (61), and a mushroom bead (63) installed in the countersunk hole (61), the mushroom bead (63) includes a head (631) and a rod (632), the fourth spring (62) is sleeved on the rod (632) of the mushroom bead (63), the countersunk hole (61) is connected to the keyhole (21), the countersunk hole (61) includes an inner hole (611) and an outer hole (612), the other end of the fourth spring (62) abuts against the wall (613) at the bottom of the outer hole (612), and the rod (632) of the mushroom bead (63) passes through the inner hole (611) and passes into the keyhole (21).

8. The lock with multiple beads combined locking according to claim 7, characterized in that: The rod portion (632) includes a limiting flange (6321) that cooperates with the wall of the bottom of the outer hole (612) to prevent the rod portion (632) from excessively extending into the keyhole (21); the inner wall surface of the installation cavity (12) is also recessed with a second long groove (122) for limiting the mushroom bead (63) and thus limiting the rotation of the lock core (2); the cross-section of the second long groove (122) is in an arc shape that matches the head (631) of the mushroom bead (63).

9. The lock with multiple beads combined locking according to claim 7, characterized in that: At least two countersunk holes (61) are provided, and the number of mushroom beads (63) to be installed is less than the number of countersunk holes (61).

10. A lock with multiple beads combined for locking according to any one of claims 1 to 9, characterized in that: The lock core (2) is provided with an anti-drilling plate (7), the lock housing (1) is provided with an anti-drilling pin (8), and the upper side of the side bead (43) is provided with a second groove (433) facing upwards. The second groove (433) is located on the left side of the first groove (431) and its depth is lower than the depth of the first groove (431).

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