Lock cylinder with directional special-shaped beads
By designing a directional irregular bead lock cylinder, combined with an irregularly shaped lock head and a limiting structure, multiple security measures are achieved for the lock cylinder, improving its anti-theft performance and making it more difficult to copy. It is suitable for high-security door locks and safes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional lock cylinders have low security and are easily cracked. Furthermore, key duplication and cracking tools are widely available, making it difficult to provide high security.
The lock cylinder is designed with directional irregularly shaped beads. Through the cooperation of irregularly shaped lock head and irregularly shaped unlocking groove, combined with limiting structure and multiple limiting grooves, the position, orientation, depth and shape of the lower pin are ensured to match at the same time. Multiple irregularly shaped pin components are used to realize complex key combinations.
It significantly improves the anti-theft performance of the lock cylinder, increases the difficulty of cracking, prevents key duplication and opening with conventional tools, reduces the possibility of repeated opening, and enhances the anti-picking function.
Smart Images
Figure CN224078874U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of key technology, and in particular to a lock cylinder with directional irregularly shaped beads. Background Technology
[0002] In traditional lock cylinders, the pins are typically cylindrical and do not have a specific orientation. The corresponding lock grooves on the key are also usually regular grooves, resulting in a low level of security and making them easy to crack. This traditional structure has the following shortcomings:
[0003] First, the cylindrical pins in traditional lock cylinders, due to their symmetrical geometry, maintain the same contact area and shape after rotation at any angle, thus lacking orientation recognition capabilities. This means that when using simple hacking tools, applying pressure at the appropriate location can cause the pins to retract to a position that allows the lock cylinder to rotate, thereby bypassing the locking mechanism.
[0004] Secondly, the lock groove design in traditional lock cylinders is too simple, usually consisting of only grooves or channels of uniform depth, lacking complex geometric features. This design greatly reduces the difficulty of replicating the lock groove; its shape information can be obtained using simple molding tools, allowing for the replication of a key that can open the lock cylinder.
[0005] Third, the matching relationship between the pins and the lock groove in a traditional lock cylinder is relatively simple, relying solely on position and depth matching to achieve locking and unlocking. This simple matching mechanism greatly reduces the number of possible combinations of lock cylinders, theoretically limiting the number of possible key shapes and increasing the possibility of being guessed.
[0006] Fourth, in some traditional lock cylinder structures, even if multiple pins are used to increase complexity, the uniformity of the pin shapes still allows the position of each pin to be determined one by one through the so-called "sequential positioning method" or "bump lock technology," thereby opening the lock cylinder without using the correct key.
[0007] Fifth, various specialized hacking tools targeting traditional lock cylinders have appeared on the market, such as expanding keys and pinball guns. These tools are designed to address the structural characteristics of traditional lock cylinders and can effectively bypass the lock cylinder's protection mechanisms in a short period of time.
[0008] Sixth, with the development of 3D printing technology, traditional keys can be quickly replicated by taking a photo of the key or by simple measurement, which further reduces the security of traditional lock cylinders.
[0009] Furthermore, because the structure of traditional lock cylinders is relatively fixed and their manufacturing process is highly standardized, related hacking techniques and knowledge are widely circulated on the Internet, making these types of lock cylinders almost defenseless against attacks from professional or semi-professional individuals.
[0010] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content
[0011] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a lock cylinder with directional irregularly shaped beads that has a higher security factor and is more difficult to crack.
[0012] This utility model is achieved through the following technical solution:
[0013] To solve the above-mentioned technical problems, this utility model provides a lock cylinder with directional irregularly shaped beads, including a lock cylinder body and a matching key. The key is provided with an irregularly shaped unlocking groove. The lock cylinder body includes a lock shell, a lock cylinder rotatably disposed in the lock shell, a lever connected to the lock cylinder, and an irregularly shaped pin assembly disposed between the lock shell and the lock cylinder. The lock shell is provided with a first receiving hole, and the lock cylinder is provided with a second receiving hole that can be radially aligned with and communicate with the first receiving hole. The irregularly shaped pin assembly includes an upper pin disposed in the first receiving hole, a return spring disposed in the first receiving hole and elastically pressing the lower pin towards the second receiving hole, and a lower pin disposed in the second receiving hole. The lower end of the lower pin is provided with an irregularly shaped lock head that can extend downward into the second receiving hole and cooperate with the irregularly shaped unlocking groove.
[0014] A limiting structure is provided between the lower ball and the second receiving hole to restrict the circumferential direction and vertical movement distance of the lower ball;
[0015] The irregularly shaped lock head can only fully engage with the corresponding irregularly shaped unlocking groove when it extends to a limited depth and orientation. At this time, the upper end of the lower pin is exactly at the boundary between the first and second receiving holes, so that the key can drive the lock cylinder and rotate the lever.
[0016] To further solve the technical problem to be solved by this utility model, this utility model provides a lock cylinder with directional irregularly shaped beads. The limiting structure includes a limiting protrusion provided on the side wall of the lower ball and a vertical limiting groove provided on the inner side wall of the second receiving hole. The lower part of the limiting groove is provided with a limiting bottom surface that can block the limiting protrusion from below. The limiting protrusion is inserted into the corresponding limiting groove and can move up and down therein.
[0017] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a lock core with directional irregular beads, wherein each second receiving hole has a plurality of limiting grooves on its inner sidewall, and these limiting grooves are staggered with each other in the circumferential direction.
[0018] To further address the technical problems to be solved by this utility model, this utility model provides a lock cylinder with directional irregularly shaped beads, wherein the irregularly shaped lock head is a crescent-shaped protrusion, and correspondingly, the irregularly shaped unlocking groove is a crescent-shaped groove.
[0019] In order to further solve the technical problems to be solved by this utility model, this utility model provides a lock core with directional irregularly shaped beads, wherein the upper and lower beads are both cylindrical, and the first and second receiving holes are both circular through holes.
[0020] In order to further solve the technical problem to be solved by this utility model, the second receiving hole of this utility model is provided with a sealing cover that blocks the upper ball and the outside of the return spring.
[0021] In order to further solve the technical problems to be solved by this utility model, this utility model provides a lock cylinder with directional irregularly shaped beads, wherein multiple irregularly shaped ball components are provided between the lock shell and the lock cylinder.
[0022] Compared with the prior art, this utility model has the following innovative design:
[0023] Irregularly shaped pin design: The bottom of the lower pin features a directional irregularly shaped lock head (such as a crescent-shaped protrusion) that matches the irregularly shaped unlocking groove (crescent-shaped groove) on the key.
[0024] Directional limiting structure: A limiting protrusion and a limiting groove are set between the lower ball and the receiving hole to ensure that the lower ball can only move in a specific direction and cannot rotate freely.
[0025] Multiple limiting groove design: Each receiving hole has multiple circumferentially staggered limiting grooves on its inner sidewall, which allows the same lower ball to be installed in different orientations to form different key combinations.
[0026] Multiple pin combinations: The lock can only be opened by simultaneously ensuring that all the pins are in the correct position and orientation.
[0027] The above design has the following advantages:
[0028] Four-fold security: Unlocking requires that the position, orientation, depth, and shape of the pins perfectly match the key.
[0029] Enhanced anti-theft performance: Due to the directional nature of the irregularly shaped lock head, the difficulty of cracking is greatly increased, and ordinary lock picking tools cannot meet the requirements of both position and direction at the same time.
[0030] Anti-copying performance: The special shape and installation orientation of the irregular lock head make it difficult to copy the key by simple measurement or photography.
[0031] Increased number of combinations: By changing the orientation, depth, and shape of different marbles, a large number of key combinations can be formed, significantly reducing the possibility of repeated opening.
[0032] Enhanced anti-pick function: Multiple irregularly shaped pin components must be in the correct position simultaneously to unlock, rendering sequential positioning or bump lock technology ineffective.
[0033] This innovative lock cylinder design significantly improves the security performance of the lock cylinder by combining shape recognition and orientation recognition, making it suitable for security products such as door locks and safes that require high security. Attached Figure Description
[0034] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:
[0035] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;
[0036] Figure 2 This is an exploded view of the present invention;
[0037] Figure 3 This is a 3D structural diagram of the lower marble;
[0038] Figure 4 This is a 3D structural diagram of a key;
[0039] Figure 5 This is an exploded view of the irregularly shaped marble component;
[0040] Figure 6 This is a schematic diagram of the cross-section of the irregularly shaped marble assembly. Detailed Implementation
[0041] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] See Figures 1 to 6 As shown, this utility model provides a lock cylinder with directional irregularly shaped beads, including a lock cylinder body and a matching key 1. The lock cylinder body is composed of a lock shell 2, a lock cylinder 3, a lever 4, and an irregularly shaped pin assembly 5, etc. The key 1 is provided with an irregularly shaped unlocking groove 11 that cooperates with the irregularly shaped pin assembly 5.
[0043] The lock housing 2 serves as the outer shell of the lock cylinder, and its internal space is used to accommodate the lock cylinder 3. The lock cylinder 3 is rotatably mounted inside the lock housing 2 and can rotate relative to the lock housing 2 under certain conditions. The latch 4 is connected to the lock cylinder 3. When the lock cylinder 3 rotates, the latch 4 rotates accordingly, which can move the bolt, thereby realizing the unlocking function of the lock cylinder.
[0044] A key irregularly shaped pin assembly 5 is disposed between the lock housing 2 and the lock cylinder 3. Specifically, the lock housing 2 has a first receiving hole 21 for accommodating the upper structure of the irregularly shaped pin assembly 5. The lock cylinder 3 has a second receiving hole 31, which is radially aligned with and communicates with the first receiving hole 21 to form a through channel for accommodating the lower structure of the irregularly shaped pin assembly 5.
[0045] The irregularly shaped pin assembly 5 is the core part of this utility model, which includes three main components: an upper pin 51 disposed in the first receiving hole 21, a return spring 52 disposed in the first receiving hole 21 and elastically pressing the lower pin 53 towards the second receiving hole 31, and a lower pin 53 disposed in the second receiving hole 31. The lower end of the lower pin 53 is provided with an irregularly shaped lock head 531 that can extend downwards into the second receiving hole 31 and cooperate with the irregularly shaped unlocking groove 11 on the key 1.
[0046] A limiting structure is provided between the lower ball 53 and the second receiving hole 31. This structure is used to limit the rotation of the lower ball 53 in the circumferential direction and the distance of its vertical movement, ensuring that the lower ball 53 can only move within a predetermined trajectory.
[0047] The key security mechanism of this invention lies in the fact that the irregularly shaped lock head 531 can only fully engage with the corresponding irregularly shaped unlocking groove 11 when it extends to a limited depth and orientation. At this time, the upper end of the lower pin 53 is exactly at the boundary between the first receiving hole 21 and the second receiving hole 31. This precise positional relationship allows the key 1 to drive the lock cylinder 3 and the lever 4 to rotate, thereby realizing the unlocking operation.
[0048] The specific implementation of the limiting structure is as follows: The structure includes a limiting protrusion 532 on the side wall of the lower ball 53 and a vertical limiting groove 311 on the inner side wall of the second receiving hole 31. The lower part of the limiting groove 311 is provided with a limiting bottom surface 312 (the limiting bottom surface 312 can be designed with different heights) that can block the limiting protrusion 532 from below. This design prevents the lower ball 53 from completely dislodging from the second receiving hole 31. The limiting protrusion 532 is inserted into the corresponding limiting groove 311 and can move up and down within the limiting groove 311, but its circumferential rotation is restricted to ensure that the irregular lock head 531 remains in the predetermined direction.
[0049] Another technical feature of this invention is that each second receiving hole 31 has multiple limiting grooves 311 on its inner sidewall, and these limiting grooves 311 are staggered in the circumferential direction. This design allows the limiting protrusions 532 on the lower ball 53 to be selectively installed in different limiting grooves 311 during lock cylinder assembly. Different limiting grooves 311 correspond to different orientations or depths of the lower ball 53, thereby forming different key combinations, greatly increasing the security and anti-copying capability of the lock cylinder.
[0050] like Figure 3 and Figure 5 As shown, in a preferred embodiment, the irregularly shaped lock head 531 is designed as a crescent-shaped protrusion, and correspondingly, the irregularly shaped unlocking groove 11 on the key 1 is a crescent-shaped groove. This asymmetrical geometry further increases the security of the lock cylinder because the crescent shape has a clear directionality, and a perfect fit can only be achieved in a specific direction.
[0051] To ensure the stability and reliability of the irregularly shaped marble assembly 5, both the upper marble 51 and the lower marble 53 are cylindrical, which maintains good stability and guidance during up-and-down movement. Correspondingly, the first receiving hole 21 and the second receiving hole 31 are both circular through holes, matching the shape of the marbles.
[0052] To facilitate assembly and maintenance, a sealing cover 54 is also provided in the second receiving hole 31 to block the upper ball 51 and the return spring 52. The sealing cover 54 not only prevents the ball and spring from falling out, but also facilitates the assembly process of the lock cylinder.
[0053] To further enhance the security of the lock cylinder, this invention incorporates multiple irregularly shaped pin assemblies 5 between the lock housing 2 and the lock cylinder 3. This design provides the lock cylinder with a stronger anti-pick function, requiring all the lower pins to be simultaneously pried into the correct positions to open the lock, significantly increasing the difficulty of unauthorized opening.
[0054] This invention relates to a lock cylinder that, based on traditional lock cylinders, cleverly incorporates irregularly shaped beads with directional characteristics. This design enables comprehensive control over the position, orientation, depth, and shape of the lower pin 53. These four factors must perfectly align with the corresponding irregularly shaped unlocking groove 11 on the key 1 to unlock the lock, significantly improving the security and anti-theft performance of the lock cylinder.
[0055] In practical use, the correct key 1 is inserted into the lock cylinder, and the irregular unlocking groove 11 on key 1 accurately aligns with the irregular lock head 531 on the lower pin 53. When the irregular lock head 531 is inserted into the irregular unlocking groove 11 at the correct depth and orientation, the lower pin 53 is pushed to the boundary between the first receiving hole 21 and the second receiving hole 31. At this time, turning key 1 causes the lock cylinder 3 and the latch 4 to rotate accordingly, thus achieving the unlocking operation. If an incorrect key is used, or the key is inserted in the wrong direction, the irregular lock head 531 cannot properly align with the irregular unlocking groove 11, the lower pin 53 cannot be pushed to the correct position, the lock cylinder 3 will not be able to rotate, and unlocking will not be possible.
[0056] This invention significantly improves the security and anti-theft performance of the lock cylinder by introducing irregularly shaped beads with directional characteristics, combined with a limiting mechanism and multiple combination designs. It is suitable for various security products such as door locks and safes that require high security.
Claims
1. A lock cylinder having a directional beveled key, characterized by: The application relates to a lock cylinder and a matching key (1) provided with a special-shaped unlocking slot (11), wherein the lock cylinder comprises a lock shell (2), a lock barrel (3) rotatably arranged in the lock shell (2), a dial (4) connected with the lock barrel (3), and a special-shaped ball assembly (5) arranged between the lock shell (2) and the lock barrel (3); the lock shell (2) is provided with a first accommodating hole (21); the lock barrel (3) is provided with a second accommodating hole (31) capable of being radially aligned with and communicated with the first accommodating hole (21); the special-shaped ball assembly (5) comprises an upper ball (51) arranged in the first accommodating hole (21), a reset spring (52) arranged in the first accommodating hole (21) and elastically pressing a lower ball (53) towards the second accommodating hole (31), and the lower ball (53) arranged in the second accommodating hole (31); the lower end of the lower ball (53) is provided with a special-shaped lock head (531) capable of extending downwards out of the second accommodating hole (31) and matched with the special-shaped unlocking slot (11). A limiting structure is arranged between the lower ball (53) and the second accommodating hole (31) for limiting the circumferential direction and the moving distance of the lower ball (53). Only when the special-shaped lock head (531) extends to the corresponding special-shaped unlocking slot (11) at a defined depth and direction, the special-shaped lock head (531) can be completely matched with the special-shaped unlocking slot (11), at this time, the upper end of the lower ball (53) is just located at the boundary between the first accommodating hole (21) and the second accommodating hole (31), so that the key (1) can drive the lock barrel (3) and the dial (4) to rotate.
2. A lock cylinder with directionally shaped beads according to claim 1, characterized in that: The limiting structure comprises a limiting lug (532) arranged on the side wall of the lower ball (53) and a vertical limiting groove (311) arranged on the inner side wall of the second accommodating hole (31), the lower part of the limiting groove (311) is provided with a limiting bottom surface (312) capable of blocking the limiting lug (532) from below, and the limiting lug (532) is inserted into the corresponding limiting groove (311) and can move up and down in the limiting groove (311).
3. A lock cylinder with directionally shaped beads according to claim 2, characterized in that: A plurality of limiting grooves (311) are arranged on the inner side wall of each second accommodating hole (31), and the limiting grooves (311) are staggered in the circumferential direction.
4. The lock cylinder with directionally shaped beads of claim 1, wherein: The special-shaped lock head (531) is a crescent-shaped protrusion, and correspondingly, the special-shaped unlocking slot (11) is a crescent-shaped groove.
5. The lock cylinder with directionally shaped beads of claim 1, wherein: The upper ball (51) and the lower ball (53) are both cylindrical, and the first accommodating hole (21) and the second accommodating hole (31) are both circular through holes.
6. The lock core with directional beveled beads of claim 1, wherein: A blocking cover (54) is further arranged in the second accommodating hole (31) and blocks the outside of the upper ball (51) and the reset spring (52).
7. The lock core with directional beveled beads of claim 1, wherein: A plurality of special-shaped ball assemblies (5) are arranged between the lock shell (2) and the lock barrel (3).