High-safety lock

Abstract

The invention discloses a high-safety lock, which relates to the technical field of locks, and comprises a lock cylinder, a key and a marble assembly, the lock cylinder comprises a lock liner with a key hole and a lock shell, a positioning marble with a positioning notch is arranged in a positioning marble hole of the lock cylinder, and an extension groove extending to the positioning marble hole is formed in the end part of the lock liner; the key comprises a key handle, a transition section and a key body, the transition section is provided with a positioning boss, and the boss extends into the extension groove to be embedded into the positioning notch. A unique positioning structure forms a closed private interface, a general key blank cannot be copied, and key copying is blocked from the source; the positioning boss and the notch are embedded to realize dual precise positioning and also realize identity verification, so that the anti-opening capability is improved; the innovative positioning system adapts to an existing lock structure, is compatible with multiple scenes, and gives consideration to safety and practicability.

Description

Technical Field

[0001] This invention relates to the field of lock technology, and more specifically to a high-security lock. Background Technology

[0002] The security of mechanical locks has long focused on the complexity of the internal structure of the lock cylinder, such as increasing the number of pin rows, changing the direction of pin movement, or adding various anti-technical opening mechanisms. However, a long-neglected weakness lies in the fact that most locks use the industry-standard "key shoulder" positioning method for key axial positioning. The "key shoulder" positioning method refers to the step surface (key shoulder) formed between the key handle and the key body. When the key is inserted, this key shoulder rests against the end face of the lock cylinder, thus determining the key's insertion depth. This positioning method has become a global standard in the lock industry. A serious consequence of this is that although the key teeth (embossed coding) of different brands and models vary greatly, the basic interface based on "key shoulder" positioning is uniform and open. This open interface leaves a huge security vulnerability for illegal counterfeiting. 1. Extremely low barrier to counterfeiting: The anti-theft performance of a lock collapses the moment a key is successfully counterfeited. Based on a universal key shoulder structure, counterfeiters do not need to understand the complex internal workings of the lock cylinder; they can quickly and cost-effectively replicate a usable key using standard key blanks simply through simple mapping or reverse engineering. The widely available key duplication machines operate based on this universal interface.

[0003] 2. Inability to achieve true technical isolation: Even if a manufacturer develops an extremely complex lock cylinder structure, as long as it still uses a key shoulder for positioning, its key blank cannot be physically isolated from the universal standard. Counterfeiters can always easily obtain compatible blank key blanks, rendering the core security design of the lock cylinder ineffective.

[0004] Therefore, while the industry-standard "key shoulder" positioning method provides basic positioning functionality, it also essentially constructs an open, low-protection "standard interface," which has become a structural bottleneck restricting the anti-counterfeiting capabilities of high-security locks. To achieve a fundamental breakthrough in lock security, this universal standard must be completely broken, and disruptive innovation must be carried out from the source of the key's positioning structure to construct a closed, proprietary "private interface."

[0005] The purpose of this invention is to fundamentally solve the aforementioned counterfeiting loopholes by creating a completely new, non-standard key positioning system, making illegal counterfeiting impossible due to the inability to obtain suitable key blanks, thereby truly achieving the "uncounterfeitability" of locks. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides a high-security lock.

[0007] The technical solution adopted in this invention is: a high-security lock, including a lock cylinder, a key and a pin assembly. The lock cylinder includes a lock cylinder with a keyhole and a lock shell fitted outside the lock cylinder. It also includes a positioning pin installed in the positioning pin hole of the lock cylinder. The bottom of the positioning pin is provided with a positioning notch. The end of the lock cylinder is provided with an extension groove extending into the positioning pin hole; The key includes a handle, a transition section, and a key body. One end of the transition section extends with a positioning boss, which extends from the extension groove and engages with the positioning notch.

[0008] Furthermore, the positioning tumbler includes a positioning bead, a positioning spring, and a positioning body, with the positioning notch provided on the positioning body.

[0009] Furthermore, the pin assembly includes a front pin assembly and a side pin assembly. The lock cylinder is provided with a front pin hole and a side pin hole. The side pin assembly is composed of multiple side pins. The side pin includes a side sealing bead, a side spring, a side middle spring, a side body, and a side steel ball arranged in sequence. The key has a raised elongated ridge on its side, and a steel ball groove that matches the side steel ball. The side pin assembly is moved by the steel ball groove to release the side lock cylinder.

[0010] Furthermore, the bottom of the side body is provided with a lower support slope, and the middle of the lower support slope is provided with an arc-shaped concave surface adapted to the side steel ball. The upper end of the side body is provided with a first slope and a second slope. The slope of the first slope is greater than the slope of the second slope. The second slope fits and abuts against the third slope at the bottom of the side spring.

[0011] Furthermore, the upper end of the side spring is provided with a spring boss that fits onto one end of the side spring.

[0012] Furthermore, the side of the lock cylinder is provided with a ball hole corresponding to the side ball, a stop pin groove is provided in the ball hole, and a stop pin shaft is provided in the stop pin groove.

[0013] Furthermore, the front pin assembly includes at least three engineering pins and a lock cylinder pin, wherein the engineering pins, lock cylinder pins, and positioning pins are arranged side by side.

[0014] Furthermore, the engineering projectile includes an engineering sealing bead, an engineering spring, an engineering middle projectile, an engineering steel ball, and an engineering body arranged in sequence, with the ends of the engineering middle projectile and the engineering body having a flat surface that abuts against the engineering steel ball.

[0015] Furthermore, the end of the lock cylinder is provided with a positioning groove, and the transition section has a positioning part that engages with the positioning groove.

[0016] Furthermore, the length codes of the multiple engineering projectiles are different from each other, and they can be simultaneously driven to a set position by an engineering key to activate or deactivate the engineering key function.

[0017] The beneficial effects of this invention are: 1. Prevents and enhances anti-theft performance: By incorporating unique positioning pins and positioning protrusions on the key, all generic key blanks produced based on the "key shoulder" standard on the market are completely unusable for counterfeiting the keys of this invention. Illegal counterfeiters cannot obtain suitable blank key blanks, fundamentally blocking the path of illegal unlocking through key duplication. This unique structure establishes a solid technical barrier for the lock, preventing counterfeiters from even reaching the most basic "material acquisition" stage, greatly enhancing the overall security of the lock, and achieving a qualitative leap from "difficult to counterfeit" to "impossible to counterfeit."

[0018] 2. Revolutionary high-precision positioning enhances lock cylinder reliability: Traditional "key shoulders" only perform a single axial positioning function and have no linkage with the lock cylinder's anti-theft structure. In this invention, the positioning boss must extend from the lock cylinder extension groove and precisely engage with the positioning notch of the positioning pin to complete key positioning. This process not only achieves precise positioning of both key insertion depth and circumferential position but also makes the positioning structure itself an important component of the lock cylinder's anti-theft system. If the positioning boss and positioning notch misalign, the key cannot be positioned correctly, thus failing to drive the subsequent pin mechanism. This is equivalent to adding a "dedicated identity verification" checkpoint before the lock opening process, deeply binding the positioning function with anti-theft performance, significantly improving the overall security level of the lock, and effectively resisting the risks of technical unlocking and unauthorized key attempts.

[0019] 3. Strong structural compatibility, adaptable to various usage scenarios: The innovative positioning system of this invention optimizes only the positioning and coordination between the key and the lock cylinder, without requiring radical modifications to the main structure of the lock shell and lock cylinder, or the core mechanism of the pin tumbler transmission. It can flexibly adapt to mechanical locks with different opening modes, such as single-opening and double-opening. While ensuring high anti-theft performance, it reduces the difficulty of compatibility with existing lock manufacturing processes, facilitating industrial application and providing a feasible solution for upgrading lock security in different scenarios (such as homes, commercial venues, and industrial facilities), combining security and practicality.

[0020] In summary, this invention is not a simple improvement on existing technology, but a disruptive innovation. By reconstructing the positioning basis of the key, it not only solves the long-standing problem of positioning accuracy, but more importantly, it successfully elevates the security of locks to a completely new dimension—that is, through the privatization of the physical interface, it achieves essential anti-counterfeiting, setting an insurmountable technical threshold for high-security locks.

[0021] In addition to the objectives, features and advantages described above, the present invention has other objectives, features and advantages.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of a key.

[0025] Figure 3 This is a schematic diagram of the cross-section of the side ball bearing assembly.

[0026] Figure 4 This is a cross-sectional schematic diagram of the front ball bearing assembly.

[0027] Figure 5 This is an exploded view of the present invention.

[0028] Figure 6 This is a schematic diagram of the main body from the side.

[0029] Figure 7 This is a schematic diagram of the side ball bearing assembly.

[0030] Figure 8 This is a schematic diagram of the front-side ball bearing assembly.

[0031] Figure 9 This is a schematic diagram of the lock cylinder structure.

[0032] Figure 10 This is a structural schematic diagram of the clasp from another perspective.

[0033] Figure 1-101. Lock cylinder; 2. Key; 3. Keyhole; 4. Lock cylinder; 5. Lock case; 6. Positioning pin hole; 7. Positioning notch; 8. Extension groove; 9. Key handle; 10. Transition section; 11. Key body; 12. Positioning boss; 13. Positioning sealing bead; 14. Positioning spring; 15. Positioning body; 16. Front pin assembly; 17. Side pin assembly; 18. Front pin hole; 19. Side pin hole; 20. Side sealing bead; 21. Side spring; 22. Side center spring; 23. Side body; 24. 25. Side steel ball; 26. Long strip protrusion; 27. Steel ball groove; 28. Lower support slope; 29. ​​Arc-shaped concave surface; 30. First slope; 31. Second slope; 32. Third slope; 33. Spring boss; 34. Steel ball hole; 35. Stop pin groove; 36. Stop pin shaft; 37. Engineering pin; 38. Lock core pin; 39. Engineering sealing bead; 40. Engineering spring; 41. Engineering steel ball; 42. Engineering main body; 43. Positioning groove; 44. Positioning part; 45. Engineering pin hole. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] This invention provides a high-security lock.

[0037] In this embodiment, refer to Figure 1-10 The high-security lock includes a lock cylinder 1, a key 2 and a pin assembly. The lock cylinder includes a lock cylinder 3 with a keyhole 4 and a lock shell 5 fitted outside the lock cylinder. It also includes a positioning pin 6 installed in the positioning pin hole of the lock cylinder. The bottom of the positioning pin is provided with a positioning notch 7. The end of the lock cylinder is provided with an extension groove 8 that extends into the positioning pin hole; The key includes a handle 9, a transition section 10 and a key body 11. One end of the transition section extends with a positioning boss 12, which extends from the extension groove and engages with the positioning notch 7.

[0038] The above technical solution adds a dedicated positioning system consisting of "positioning pins (with positioning notches), lock cylinder extension grooves, and key positioning bosses": the positioning pins are pre-installed in the positioning pin holes of the lock cylinder, and their bottom positioning notches form matching slots; the extension groove at the end of the lock cylinder provides an insertion channel for the positioning bosses, and the extension groove is connected to the positioning pin holes to ensure that the bosses can reach the notch positions directly; the positioning bosses of the key transition section extend from the extension grooves and engage with the positioning notches of the positioning pins to complete the axial and circumferential positioning of the key in the lock cylinder, thereby enabling subsequent opening actions.

[0039] The unique design of the positioning pin notch shape, boss, and extension groove structure forms a closed "private interface." Counterfeiters cannot obtain the parameters through conventional surveying, nor can they process the boss using a standard key blank, thus blocking the key duplication path at the source. The fitting of the positioning boss and the notch is a prerequisite for effective key positioning. If the structures do not match, positioning cannot be completed. This is equivalent to adding "authentication" before the opening process, preventing unauthorized keys from attempting to open the lock, improving the overall security level of the lock, enhancing anti-theft and anti-duplication effects, and greatly improving security.

[0040] Specifically, the positioning ball includes a positioning sealing bead 13, a positioning spring 14, and a positioning body 15, with the positioning notch provided on the positioning body.

[0041] In this embodiment, the positioning pin is disassembled into three parts: positioning sealing bead, positioning spring, and positioning body. The positioning sealing bead is used to block the positioning pin hole of the lock cylinder to prevent foreign objects from entering. The positioning spring provides continuous elastic pressure so that the positioning body always maintains a close fit with the key positioning boss. The positioning notch is specially opened at the bottom of the positioning body to ensure that the notch position is stable. The positioning body can be finely adjusted under the action of the spring to compensate for the slight deviation when the key is inserted and ensure that the boss and the notch fit together.

[0042] Specifically, the pin assembly includes a front pin assembly 16 and a side pin assembly 17. The lock cylinder is provided with a front pin hole 18 and a side pin hole 19. The side pin assembly is composed of multiple side pins. The side pin includes a side sealing bead 20, a side spring 21, a side center spring 22, a side body 23, and a side steel ball 24 arranged in sequence. The key has a raised elongated ridge 25 on its side, and a steel ball groove 26 adapted to the side steel ball on the elongated ridge 25. The side tumbler assembly is moved by the steel ball groove 26 to release the side lock cylinder.

[0043] In this embodiment, the pin assemblies are divided into two categories: front (main drive) and side (auxiliary locking). The front pin assemblies correspond to the front pin holes of the lock cylinder and undertake the core opening and transmission function. The side pin assemblies consist of multiple "side sealing beads, side springs, side middle springs, side bodies, and side steel balls", which are pre-installed in the side pin holes. The side steel balls protrude into the gap between the lock cylinder and the lock shell, forming a side lock. The steel ball groove on the long ridge of the key side is adapted to the side steel ball. When the key is inserted, the steel ball groove squeezes the side steel ball, which in turn pushes the side body and the side middle spring to compress the side spring, causing the side steel ball to retract into the lock cylinder, releasing the side lock, and cooperating with the front pin assemblies to realize the rotation of the lock cylinder.

[0044] By adding a side lock on top of the front lock, a "two-way protection" is formed. Breaking it requires precise control of multiple sets of pins on the front and sides at the same time, which greatly increases the difficulty of technically opening it.

[0045] Specifically, the bottom of the side body is provided with a lower support slope 277, the middle of the lower support slope 27 is provided with an arc-shaped concave surface 28 adapted to the side steel ball, the upper end of the side body is provided with a first slope 29 and a second slope 30, the slope of the first slope is greater than the slope of the second slope, and the second slope is fitted and abutted against the third slope 31 at the bottom of the side ball.

[0046] In this embodiment, a supporting slope is designed at the bottom of the side body. The arc-shaped concave surface in the middle of the slope precisely fits with the side steel ball, ensuring that the steel ball can slide smoothly along the concave surface when under force, avoiding jamming. The upper end of the side body is provided with first and second slopes with different inclinations. The second slope fits with the third slope at the bottom of the side ball. Because the first slope has a larger inclination, it can provide a "stepped" guide when the side ball moves. At the same time, the contact area between the second and third slopes is increased. The unique interlocking structure (arc-shaped concave surface precisely fits with the side steel ball, and second slope fits with the third slope) can effectively prevent the side ball from rotating during movement, ensuring that it always operates in the correct working posture and improving reliability.

[0047] Specifically, the upper end of the side spring is provided with a spring boss 32 that is fitted to one end of the side spring.

[0048] In this embodiment, a spring boss is provided at the upper end of the side spring. The boss is precisely fitted with the side spring, so that the spring always moves around the axis of the boss during compression and reset, avoiding spring deviation, twisting or friction with the inner wall of the ball hole.

[0049] Specifically, the side of the lock cylinder is provided with a ball hole 33 corresponding to the side ball, a stop pin groove 34 is provided in the ball hole 33, and a stop pin shaft 35 is provided in the stop pin groove.

[0050] In this embodiment, a stop pin groove is opened in the ball hole corresponding to the side ball on the side of the lock cylinder. The stop pin shaft is pre-installed in the stop pin groove, and the position of the stop pin shaft corresponds to the outer side of the side ball. This restricts the side ball from protruding excessively outward in the non-unlocked state (to prevent the ball from leaving the ball hole), while not affecting the ball's retraction into the ball hole when unlocking.

[0051] Specifically, the front pin assembly includes at least three engineering pins 36 and a lock cylinder pin 37, with the engineering pins 36, lock cylinder pins, and positioning pins arranged side by side.

[0052] In this embodiment, the front pin assembly is designed as a combination of "at least three engineering pins and lock cylinder pins," with the engineering pins, lock cylinder pins, and positioning pins arranged side by side. Traditional engineering locks typically control only one engineering pin, making them extremely easy to copy. This invention, by simultaneously controlling three or more engineering pins (with multiple engineering pin holes 45 on the corresponding lock cylinder to accommodate the engineering pins), and with their codes differing from the master key, makes the probability of reverse-engineering or copying the master key using the engineering key extremely low. By integrating multiple sets of pins for engineering functions, master key functions, and positioning functions onto the same side of the lock cylinder, the structure is compact, maximizing functionality.

[0053] The specific principle is as follows: Since the operation of the engineering key is a conventional technology, it will be briefly described here. In use, when the engineering key is inserted into the lock cylinder, it simultaneously positions the three engineering pins from their respective holes, at which point the engineering key has unlocking authority. The master key is configured such that, when inserted into the lock cylinder, it pushes the three engineering pins from their holes to the front pin holes. At this position, a portion of the engineering pins enters the lock housing, thus disabling the engineering key.

[0054] Specifically, the engineering projectile includes an engineering sealing bead 38, an engineering spring 39, an engineering middle projectile 40, an engineering steel ball 41, and an engineering body 42 arranged in sequence. The ends of the engineering middle projectile and the engineering body are provided with a flat surface that abuts against the engineering steel ball.

[0055] In this embodiment, the specific structure of the engineering ball is similar to that of the side ball. The ends of the engineering ball and the engineering body are flat and abut against the engineering steel ball. The flat contact provides a more stable and accurate force transmission, ensuring that multiple engineering balls can be controlled synchronously and accurately when the engineering key is activated and deactivated.

[0056] Specifically, the end of the lock cylinder is provided with a positioning groove 43, and the transition section has a positioning part 44 that engages with the positioning groove 43.

[0057] In this embodiment, a positioning groove is provided at the end of the lock cylinder, and a positioning part that matches the groove is designed at the key transition section. When the key is inserted into the lock cylinder, the positioning part of the transition section engages with the positioning groove of the lock cylinder, forming a dual positioning with the "positioning boss and positioning notch": the positioning groove and the positioning part cooperate to limit the circumferential rotation deviation of the key, and the positioning boss and the notch cooperate to limit the axial insertion depth. The two work together to achieve bidirectional precise positioning of the key in the lock cylinder.

[0058] Specifically, the length codes of the multiple engineering projectiles are different from each other, and they can be simultaneously driven to a set position by an engineering key to activate or deactivate the engineering key function.

[0059] In this embodiment, the length codes of the multiple engineering pins are all different. This means that the depth of the serrations corresponding to these pins on the engineering key is different for each. This is crucial to the security of the engineering key system. The different codes greatly increase the coding complexity of the engineering key, making it virtually impossible to mass-copy the master key or crack the coding pattern by intercepting an engineering key.

[0060] Please note to all technical personnel: Although the present invention has been described according to the specific embodiments above, the ideas of the present invention are not limited to this invention. Any modifications that utilize the ideas of the present invention will be included within the scope of protection of this patent.

Claims

1. A high-security lock, comprising a lock cylinder, a key, and a pin tumbler assembly, wherein the lock cylinder includes a lock cylinder with a keyhole and a lock shell fitted over the lock cylinder, characterized in that: It also includes a positioning pin installed in the positioning pin hole of the lock cylinder, wherein the bottom of the positioning pin is provided with a positioning notch; The end of the lock cylinder is provided with an extension groove extending into the positioning pin hole; The key includes a handle, a transition section, and a key body. One end of the transition section extends with a positioning boss, which extends from the extension groove and engages with the positioning notch.

2. The high-security lock according to claim 1, characterized in that: The positioning tumbler includes a positioning bead, a positioning spring, and a positioning body, with the positioning notch provided on the positioning body.

3. The high-security lock according to claim 1, characterized in that: The pin assembly includes a front pin assembly and a side pin assembly. The lock cylinder is provided with a front pin hole and a side pin hole. The side pin assembly is composed of multiple side pins. The side pin includes a side sealing bead, a side spring, a side middle spring, a side body, and a side steel ball arranged in sequence. The key has a raised elongated ridge on its side, and a steel ball groove that matches the side steel ball. The side pin assembly is moved by the steel ball groove to release the side lock cylinder.

4. The high-security lock according to claim 3, characterized in that: The bottom of the side body is provided with a lower support slope, and the middle of the lower support slope is provided with an arc-shaped concave surface that matches the side steel ball. The upper end of the side body is provided with a first slope and a second slope. The slope of the first slope is greater than the slope of the second slope. The second slope fits against the third slope at the bottom of the side ball.

5. The high-security lock according to claim 4, characterized in that: The upper end of the side spring is provided with a spring boss that fits onto one end of the side spring.

6. The high-security lock according to claim 5, characterized in that: The side of the lock cylinder is provided with a ball hole corresponding to the side ball, and a stop pin groove is provided in the ball hole, and a stop pin shaft is provided in the stop pin groove.

7. The high-security lock according to claim 3, characterized in that: The front pin assembly includes at least three engineering pins and a lock cylinder pin, with the engineering pins, lock cylinder pins and positioning pins arranged side by side.

8. The high-security lock according to claim 7, characterized in that: The engineering projectile includes an engineering sealing bead, an engineering spring, an engineering middle projectile, an engineering steel ball, and an engineering body arranged in sequence. The ends of the engineering middle projectile and the engineering body are provided with flat surfaces that abut against the engineering steel ball.

9. The high-security lock according to claim 1, characterized in that: The end of the lock cylinder is provided with a positioning groove, and the transition section has a positioning part that engages with the positioning groove.

10. The high-security lock according to claim 7, characterized in that: The length codes of the multiple engineering projectiles are different from each other, and they can be simultaneously driven to a set position by an engineering key to activate or deactivate the engineering key function.

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