Lock cylinder with directional special-shaped beads
By adopting a directional special-shaped bead design in the lock core, combined with the limit structure and multi-combination design, the problem of low safety of the traditional lock core is solved, and higher safety and anti-theft performance are achieved.
Patent Information
- Application Number
- CN202510464638.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2025-06-06
AI Technical Summary
Due to its simple design, traditional lock cores have problems such as missing direction recognition function, difficult replication of slot locks, single matching mechanism, and easy to be cracked and copied, resulting in low security.
The lock core design with directional special-shaped beads is adopted, including special-shaped lock heads and special-shaped unlocking slots. Combined with limit structure and multi-combination design, it ensures that the position, orientation, depth and shape of the lower marble are fully consistent with the key before the lock can be unlocked.
It significantly improves the safety and anti-theft performance of the lock core, increases the difficulty of cracking, reduces the risk of copying, and greatly increases the number of key combinations, significantly improving the safety guarantee of the lock core.
Smart Images
Figure CN120100253A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of keys, in particular to a lock core with directional special-shaped beads. Background Art
[0002] In traditional lock cores, the marbles are usually cylindrical, regardless of direction, and the corresponding lock slots on the keys are usually regular grooves, which have a low safety factor and are easy to be cracked. This traditional structure has the following shortcomings:
[0003] First, the cylindrical marble in the traditional lock core has no direction recognition function because of the symmetry of its geometric shape. It maintains the same contact area and contact shape after any angle rotation. This means that when using a simple cracking tool, just apply pressure at the appropriate position to make the marble retreat to a position that allows the lock core to rotate, thereby bypassing the locking mechanism.
[0004] Secondly, the design of the lock slot in the traditional lock core is too simple, usually just a groove or groove with the same depth, lacking complex geometric features. This design greatly reduces the difficulty of copying the lock slot. The shape information of the lock slot can be obtained through a simple mold extraction tool, and then the key that can open the lock core can be copied.
[0005] Third, the matching relationship between the marble and the lock slot in the traditional lock core is relatively simple, relying only on position and depth matching to achieve locking and unlocking. This single matching mechanism greatly reduces the number of lock core combinations, and the number of theoretically possible key shapes is limited, increasing the possibility of being guessed.
[0006] Fourth, in some traditional lock core structures, even if multiple marbles are used to increase complexity, due to the uniformity of the shape of the marbles, the positions of the marbles can still be determined one by one through the so-called "sequential positioning method" or "lock bumping technology", thereby opening the lock core without using the correct key.
[0007] Fifth, various special cracking tools for traditional lock cores have appeared on the market, such as expansion keys, pinball guns, etc. These tools are designed based on the structural characteristics of traditional lock cores and can effectively bypass the protection mechanism of the lock core in a short time.
[0008] Sixth, with the development of 3D printing technology, traditional keys can be quickly copied by taking a photo of the key or simply measuring it, which further reduces the security of traditional lock cylinders.
[0009] In addition, since the structure of traditional lock cores is relatively fixed, their production process has been highly standardized, and related cracking techniques and knowledge are widely circulated on the Internet, this type of lock core has almost no protection against attacks by professional or semi-professionals.
[0010] Therefore, it is necessary to further improve and perfect the prior art to overcome these shortcomings, and the present invention is made based on this situation. Summary of the invention
[0011] The object of the present invention is to overcome the deficiencies of the prior art and to provide a lock core with a directional special-shaped bead which has a higher safety factor and is more difficult to crack.
[0012] The present invention is achieved through the following technical solutions:
[0013] In order to solve the above technical problems, the present invention provides a lock core with directional special-shaped beads, including a lock core body and a matching key, the key is provided with a special-shaped unlocking groove, the lock core body includes a lock shell, a lock core rotatably arranged in the lock shell, a puller connected to the lock core, and a special-shaped marble assembly arranged between the lock shell and the lock core, the lock shell is provided with a first accommodating hole, the lock core is provided with a second accommodating hole that can be radially aligned with and connected to the first accommodating hole, the special-shaped marble assembly includes an upper marble arranged in the first accommodating hole, a return spring arranged in the first accommodating hole and elastically pressing the lower marble toward the second accommodating hole, and a lower marble arranged in the second accommodating hole, the lower end of the lower marble is provided with a special-shaped lock head that can extend downward from the second accommodating hole and cooperate with the special-shaped unlocking groove;
[0014] A limiting structure for limiting the circumferential direction and vertical movement distance of the lower marble is provided between the lower marble and the second receiving hole;
[0015] The special-shaped lock head can only fully fit with the corresponding special-shaped unlocking groove when it extends to a limited depth and direction. At this time, the upper end of the lower marble is exactly at the boundary between the first accommodating hole and the second accommodating hole, so that the key can drive the lock core and the pull to rotate.
[0016] In order to further solve the technical problem to be solved by the present invention, the present invention provides a lock core with a directional special-shaped bead, wherein the limiting structure includes a limiting protrusion arranged on the side wall of the lower bead, and a vertical limiting groove arranged on the inner wall of the second accommodating hole, and the lower part of the limiting groove is provided with a limiting bottom surface that can block the limiting protrusion from below, and 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 the present invention, in a lock core with directional special-shaped beads provided by the present invention, a plurality of limiting grooves are provided on the inner side wall of each second accommodating hole, and the limiting grooves are staggered with each other in the circumferential direction.
[0018] In order to further solve the technical problem to be solved by the present invention, the present invention provides a lock core with a directional special-shaped bead, wherein the special-shaped lock head is a crescent-shaped protrusion, and correspondingly, the special-shaped unlocking groove is a crescent-shaped groove.
[0019] In order to further solve the technical problem to be solved by the present invention, the present invention provides a lock core with directional special-shaped beads, wherein the upper marbles and the lower marbles are both cylindrical, and the first accommodating hole and the second accommodating hole are both circular through holes.
[0020] In order to further solve the technical problem to be solved by the present invention, in a lock core with a directional special-shaped bead provided by the present invention, a blocking cover blocking the outer side of the upper marble and the return spring is further provided in the second accommodating hole.
[0021] In order to further solve the technical problem to be solved by the present invention, the present invention provides a lock core with directional special-shaped beads, wherein a plurality of special-shaped marble assemblies are arranged between the lock shell and the lock core.
[0022] Compared with the prior art, the present invention has the following innovative designs:
[0023] Special-shaped marble design: A directional special-shaped lock head (such as a crescent-shaped protrusion) is designed at the bottom of the lower marble, which matches the special-shaped unlocking groove (crescent-shaped groove) on the key.
[0024] Directional limiting structure: A limiting protrusion and a limiting groove structure are set between the lower marble and the receiving hole to ensure that the lower marble can only move in a specific direction and cannot rotate freely.
[0025] Multiple limit groove design: Each accommodating hole is provided with multiple circumferentially staggered limit grooves on the inner wall, so that the same marble can be installed in different directions to form different key combinations.
[0026] Multiple marble combination: Use multiple special-shaped marble components, and all marbles must be in the correct position and direction at the same time to unlock the door.
[0027] The above design has the following advantages:
[0028] Quadruple security guarantee: To unlock the lock, the position, orientation, depth and shape of the marbles must match the key perfectly.
[0029] Improved anti-theft performance: Since the special-shaped lock head has directionality, it greatly increases the difficulty of cracking. Ordinary lock picking tools are difficult to meet the requirements of position and direction at the same time.
[0030] Anti-copying performance: The special shape and installation orientation of the special-shaped lock make it difficult to copy the key by simple measurement or taking a photo.
[0031] Increased number of combinations: By changing the orientation, depth and shape of different marbles, a huge number of key combinations can be formed, significantly reducing the possibility of repeated opening.
[0032] Enhanced anti-pick function: multiple special-shaped marble components must be in the correct position at the same time to unlock the lock, making the sequential positioning method or lock bumping technology ineffective.
[0033] This innovative lock core design significantly improves the security performance of the lock core by combining shape recognition with direction recognition. It is suitable for security protection products such as door locks and safes that require high security. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:
[0035] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;
[0036] Figure 2 It is an exploded schematic diagram of the present invention;
[0037] Figure 3 It is a schematic diagram of the three-dimensional structure of the lower marble;
[0038] Figure 4 It is a schematic diagram of the three-dimensional structure of the key;
[0039] Figure 5 This is a schematic diagram of the exploded view of the special-shaped marble assembly;
[0040] Figure 6 It is a schematic diagram of the cross section of the special-shaped marble assembly. DETAILED DESCRIPTION
[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0042] See also Figures 1 to 6 As shown, the present invention provides a lock core with directional special-shaped beads, including a lock core body and a matching key 1. The lock core body is composed of a lock shell 2, a lock core 3, a pull 4 and a special-shaped marble assembly 5, and the key 1 is provided with a special-shaped unlocking groove 11 that matches the special-shaped marble assembly 5.
[0043] The lock housing 2 is the outer shell of the lock core, and its internal space is used to accommodate the lock core 3. The lock core 3 is rotatably arranged in the lock housing 2 and can rotate relative to the lock housing 2 under certain conditions. The pull 4 is connected to the lock core 3. When the lock core 3 rotates, the pull 4 rotates accordingly, and the pull 4 can move the lock tongue, thereby realizing the unlocking function of the lock core.
[0044] A key special-shaped marble assembly 5 is arranged between the lock housing 2 and the lock core 3. Specifically, a first receiving hole 21 is provided on the lock housing 2 for receiving the upper structure of the special-shaped marble assembly 5. A second receiving hole 31 is provided on the lock core 3, which can be radially aligned with and communicated with the first receiving hole 21 to form a through passage for receiving the lower structure of the special-shaped marble assembly 5.
[0045] The special-shaped marble assembly 5 is the core part of the present invention, which includes three main components: an upper marble 51 arranged in the first receiving hole 21, a return spring 52 arranged in the first receiving hole 21 and elastically pressing the lower marble 53 toward the second receiving hole 31, and a lower marble 53 arranged in the second receiving hole 31. Among them, the lower end of the lower marble 53 is provided with a special-shaped lock head 531 that can extend downward from the second receiving hole 31 and cooperate with the special-shaped unlocking groove 11 on the key 1.
[0046] A limiting structure is provided between the lower marble 53 and the second receiving hole 31, and the structure is used to limit the rotation of the lower marble 53 in the circumferential direction and the distance of the up and down movement, thereby ensuring that the lower marble 53 can only move within a predetermined trajectory.
[0047] The key safety mechanism of the present invention is that only when the special-shaped lock head 531 extends to the corresponding special-shaped unlocking groove 11 with a limited depth and direction, the two can fully fit. At this time, the upper end of the lower marble 53 is exactly at the boundary between the first receiving hole 21 and the second receiving hole 31. This precise position relationship enables the key 1 to drive the lock core 3 and the pull 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 provided on the side wall of the lower marble 53, and a vertical limiting groove 311 provided on the inner 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 to be different heights) that can block the limiting protrusion 532 from below. This design prevents the lower marble 53 from completely escaping from the second receiving hole 31. The limiting protrusion 532 is inserted into the corresponding limiting groove 311 and can move up and down in the limiting groove 311, but its circumferential rotation is limited to ensure that the special-shaped lock head 531 remains in a predetermined direction.
[0049] Another technical feature of the present invention is that a plurality of limiting grooves 311 are provided on the inner side wall of each second receiving hole 31, and these limiting grooves 311 are staggered in the circumferential direction. This design allows the limiting protrusions 532 on the lower marble 53 to be selectively installed in different limiting grooves 311 when assembling the lock core. Different limiting grooves 311 correspond to different directions or depths of the lower marble 53, thereby forming different key combinations, which greatly increases the security and anti-copying capability of the lock core.
[0050] like Figure 3 and Figure 5 As shown, in a preferred embodiment, the special-shaped lock head 531 is designed as a crescent-shaped protrusion, and correspondingly, the special-shaped unlocking groove 11 on the key 1 is a crescent-shaped groove. This asymmetric geometric shape further increases the security of the lock core, because the crescent shape has a clear directionality and can only achieve a perfect fit in a specific direction.
[0051] In order to ensure the stability and reliability of the special-shaped marble assembly 5, the upper marble 51 and the lower marble 53 are both cylindrically designed, so that they can maintain good stability and guidance during the up and down movement. Accordingly, the first receiving hole 21 and the second receiving hole 31 are both circular through holes, matching the shape of the marbles.
[0052] In order to facilitate assembly and maintenance, a blocking cover 54 is also provided in the second receiving hole 31 to block the outer side of the upper marble 51 and the return spring 52. The blocking cover 54 not only prevents the marble and the spring from falling out, but also facilitates the assembly process of the lock core.
[0053] In order to further improve the safety of the lock core, the present invention sets a plurality of special-shaped marble assemblies 5 between the lock shell 2 and the lock core 3. This design makes the lock core have a stronger anti-pick function, and each lower marble must be picked to the correct position at the same time to open the lock, which greatly increases the difficulty of illegal opening.
[0054] The lock core of the present invention, based on the traditional lock core, has a special-shaped bead with orientation characteristics, which can realize the comprehensive control of the position, orientation, depth and shape of the lower marble 53. These four factors must be completely consistent with the corresponding special-shaped unlocking groove 11 on the key 1 to unlock the lock, which greatly improves the security and anti-theft performance of the lock core.
[0055] When in use, insert the correct key 1 into the lock core, and the special-shaped unlocking groove 11 on the key 1 is accurately connected with the special-shaped lock head 531 on the lower marble 53. When the special-shaped lock head 531 extends into the special-shaped unlocking groove 11 with the correct depth and direction, the lower marble 53 is pushed to the boundary between the first receiving hole 21 and the second receiving hole 31. At this time, turn the key 1, and the lock core 3 and the pull 4 will rotate accordingly to achieve the unlocking operation. If the wrong key is used, or the key is inserted in the wrong direction, the special-shaped lock head 531 cannot be correctly matched with the special-shaped unlocking groove 11, the lower marble 53 cannot be pushed to the correct position, the lock core 3 will not be able to rotate, and the unlocking operation cannot be achieved.
[0056] The lock core of the present invention significantly improves the safety and anti-theft performance of the lock core by introducing special-shaped beads with directional characteristics, combining a limit mechanism and a multi-combination design, and is suitable for various security protection products such as door locks and safes that require high security.
Claims
1. A lock core with directional special-shaped beads, characterized in that: The invention comprises a lock core body and a matching key (1), wherein the key (1) is provided with a special-shaped unlocking groove (11), the lock core body comprises a lock housing (2), a lock core (3) rotatably arranged in the lock housing (2), a puller (4) connected to the lock core (3), and a special-shaped marble assembly (5) arranged between the lock housing (2) and the lock core (3), the lock housing (2) is provided with a first receiving hole (21), and the lock core (3) is provided with a second receiving hole (21) which can be radially aligned with and communicated with the first receiving hole (21). The shaped marble assembly (5) comprises an upper marble (51) arranged in the first accommodating hole (21), a return spring (52) arranged in the first accommodating hole (21) and elastically pressing the lower marble (53) toward the second accommodating hole (31), and a lower marble (53) arranged in the second accommodating hole (31), wherein the lower end of the lower marble (53) is provided with a shaped lock head (531) which can extend downward from the second accommodating hole (31) and cooperate with the shaped unlocking groove (11); A limiting structure for limiting the circumferential direction and vertical movement distance of the lower marble (53) is provided between the lower marble (53) and the second receiving hole (31); Only when the special-shaped lock head (531) extends to the corresponding special-shaped unlocking groove (11) with a limited depth and direction can it be fully matched therewith. At this time, the upper end of the lower marble (53) is exactly located at the boundary between the first receiving hole (21) and the second receiving hole (31), so that the key (1) can drive the lock core (3) and the pull (4) to rotate.
2. A lock core with directional special-shaped beads according to claim 1, characterized in that: The limiting structure comprises a limiting protrusion (532) arranged on the side wall of the lower marble (53), and a vertical limiting groove (311) arranged on the inner 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 protrusion (532) from below, and the limiting protrusion (532) is inserted into the corresponding limiting groove (311) and can move up and down therein.
3. The lock core with directional special-shaped beads according to claim 2, characterized in that: A plurality of limiting grooves (311) are provided on the inner side wall of each second accommodating hole (31), and the limiting grooves (311) are staggered with each other in the circumferential direction.
4. The lock core with directional special-shaped beads according to claim 1, characterized in that: The special-shaped lock head (531) is a crescent-shaped protrusion, and correspondingly, the special-shaped unlocking groove (11) is a crescent-shaped groove.
5. The lock core with directional special-shaped beads according to claim 1, characterized in that: The upper marble (51) and the lower marble (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 special-shaped beads according to claim 1, characterized in that: The second receiving hole (31) is also provided with a blocking cover (54) blocking the outer side of the upper marble (51) and the return spring (52).
7. The lock core with directional special-shaped beads according to claim 1, characterized in that: A plurality of special-shaped marble assemblies (5) are arranged between the lock housing (2) and the lock core (3).