An engineering key system of a high security lock, an engineering key and a master key

Abstract

The utility model discloses an engineering key system of high security lock and engineering key and master key, including lock shell, lock gall, master key and engineering key. The lock gall is equipped with main marble hole and at least three independent engineering marble hole, and engineering marble hole has first position in the lock gall and second position in the junction of lock gall and lock shell. At least three engineering marbles with different length coding are contained in engineering marble hole. Engineering key can position all engineering marbles in first position, and make it have the unlocking right; master key can push engineering marble from first position to second position, and make marble part enter into lock shell, thereby completely cancel engineering key right. The utility model discloses through the design of multiple marble independent hole position and dynamic right switching mechanism, greatly improves the precision reliability of copyproof, anti-technology opening ability and right management.

Description

Technical Field

[0001] This utility model relates to the field of lock security technology, and in particular to an engineering key system for mechanical locks. Specifically, this application provides an engineering key system that achieves high-security access control switching through multiple independently coded engineering pins and their dedicated hole structure. Background Technology

[0002] Mechanical lock engineering key systems (also known as AB key systems) are widely used in fields such as building decoration and hotel management. Their purpose is to allocate and manage temporary and permanent access permissions using different keys. The common working principle of an engineering key system is that one or more sets of special engineering pins are set inside the lock cylinder. By using the difference in tooth shape between the engineering key and the master key, specific engineering pins are driven to different heights, thereby activating or deactivating the engineering key's permissions.

[0003] However, existing systems of this kind have significant security flaws. First, most systems rely on a single engineered pin to switch access. This design makes the coding structure overly simple, allowing malicious actors to easily deduce or replicate the master key's tooth pattern by analyzing, measuring, or copying an engineered key, posing a very high security risk. Second, traditional engineered pins are usually mixed with regular master pins in the same pinhole channel, and their movement trajectory and access switching logic are relatively simple and fixed, making them easy for people familiar with lock principles to detect and crack using technical means.

[0004] Furthermore, regarding the reliability of permission switching, existing designs often fail to achieve thorough and accurate permission cancellation. After use, the cancellation of permissions for engineering keys may not be complete, posing a risk of permission confusion due to manufacturing tolerances or wear, thus failing to provide users with absolutely reliable security.

[0005] Therefore, existing engineering key systems have significant shortcomings in terms of anti-copying, anti-cracking, and reliability of access control, making it difficult to meet the application requirements of high-security scenarios. There is an urgent need for a completely new engineering key system solution that can fundamentally improve the level of security. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides an engineering key system for a high-security lock, as well as an engineering key and a master key.

[0007] The technical solution adopted by this utility model is: an engineering key system for a high-security lock, comprising a lock shell, a lock cylinder rotatably disposed within the lock shell, a master key, and an engineering key. The lock cylinder is provided with at least one main pin hole for accommodating lock cylinder pins, and at least three engineering pin holes for accommodating engineering pins. The engineering pin hole is configured to have a first position located inside the lock cylinder and a second position located at the junction of the lock cylinder and the lock case; At least three engineering projectiles with different length codes are movably accommodated within the engineering projectile holes; The engineering key is configured such that when it is inserted into the lock cylinder, it can simultaneously position at least three engineering pins at the first position of the engineering pin hole, at which time the engineering key has unlocking authority. The master key is configured such that, when inserted into the lock cylinder, it can push the at least three engineering pins from the first position to the second position, in which a portion of the engineering pins enters the lock housing, thereby disabling the engineering key.

[0008] Furthermore, when the engineering pin is in the second position, it is arranged side by side with the lock cylinder pin in the main pin hole.

[0009] 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.

[0010] This application also provides an engineering key for an engineering key system of a high-security lock, wherein the tooth coding of the engineering key is configured to simultaneously position at least three engineering pins with different length codes in a first position within its engineering pin holes.

[0011] This application also provides a master key for an engineering key system of a high-security lock, wherein the master key's toothed coding is configured to push at least three engineering pins from a first position within their engineering pin holes to a second position in which a portion of them enters the lock housing.

[0012] The beneficial effects of this utility model are: 1. Fundamentally Enhanced Anti-Copying and Anti-Cracking Capabilities: By setting at least three engineered pins with distinct length codes and accommodating them in independent engineered pin holes, this system significantly increases the coding complexity and uniqueness of the key. Even if unauthorized individuals obtain the engineered key, it is difficult for them to accurately deduce the coding combinations of all engineered pins and the corresponding tooth shape of the master key through reverse engineering. This fundamentally eliminates the security vulnerability of illegally duplicating the master key by copying the engineered key, resulting in a qualitative leap in anti-copying capabilities.

[0013] 2. Achieving Precise and Reliable Access Control and Management: This application constructs a clear and reliable access control logic by defining a first position (engineering key valid) and a second position (engineering key invalid) for the engineering pin tumbler. When the master key is inserted, the engineering pin is precisely pushed to the second position, with part of its body entering the lock housing. This achieves a physical, irreversible, and complete cancellation of the engineering key's access control, effectively avoiding access control confusion caused by parts wear or tolerances. Access control management is precise and reliable.

[0014] 3. Enhanced overall lock security against technical unlocking: The multiple independently moving engineering pins introduce greater uncertainty and complexity, posing a significant obstacle to the detection and operation of technical unlocking tools (such as hooks and pry bars). Unlockers not only need to deal with the regular main pins, but also need to simultaneously and accurately judge and control multiple engineering pins in unknown states, greatly increasing the difficulty and time cost of technical unlocking, thereby significantly improving the overall security of the lock.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0018] Figure 3 This is an exploded view of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of an engineering projectile.

[0020] Figure 5 This is a schematic diagram of the lock cylinder structure.

[0021] Figure 1-5 In the middle: 1. Lock case; 2. Lock cylinder; 3. Master key; 4. Lock cylinder pins; 5. Main pin hole; 6. Engineering pins; 7. Engineering pin hole; 8. Engineering sealing bead; 9. Engineering spring; 10. Engineering middle spring; 11. Engineering steel ball; 12. Engineering body; 13. Plane. Detailed Implementation

[0022] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of this utility model 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.

[0024] This invention provides an engineering key system for a high-security lock.

[0025] In this embodiment, refer to Figure 1-5 The engineering key system of this high-security lock includes a lock shell 1, a lock cylinder 2 rotatably disposed within the lock shell, a master key 3 and an engineering key. The lock cylinder is provided with at least one master pin hole 5 for accommodating lock cylinder pins 4, and at least three engineering pin holes 7 for accommodating engineering pins 6. The engineering pin hole is configured to have a first position located inside the lock cylinder and a second position located at the junction of the lock cylinder and the lock case; At least three engineering projectiles with different length codes are movably accommodated within the engineering projectile holes; The engineering key is configured such that when it is inserted into the lock cylinder, it can simultaneously position at least three engineering pins at the first position of the engineering pin hole, at which time the engineering key has unlocking authority. The master key is configured such that, when inserted into the lock cylinder, it can push the at least three engineering pins from the first position to the second position, in which a portion of the engineering pins enters the lock housing, thereby disabling the engineering key.

[0026] In this embodiment, at least three independent engineering pin holes are provided within the lock cylinder. These holes are designed with two key working positions—a first position (completely within the lock cylinder) and a second position (across the boundary between the lock cylinder and the lock housing). At least three engineering pins with different length codes are placed within these holes. When the engineering key is used, its specific tooth shape precisely lifts and stabilizes all the engineering pins in the "first position," at which point all pins are concealed within the lock cylinder, allowing the lock cylinder to rotate freely, and the engineering key's permissions are active. When the master key is used, its different tooth shape pushes these engineering pins further upward from the "first position" to the "second position," causing a portion of the pins to enter the lock housing, creating a physical barrier and thus completely deactivating the engineering key's permissions.

[0027] Thus, by placing the engineered pins in two different physical locations, the "activation" and "complete deactivation" of the engineered key's permissions are achieved, resulting in clear and reliable permission management and avoiding the permission confusion risks that may exist in traditional single-pin systems. Because it requires simultaneous and precise control of three or more pins with different codes, it becomes extremely difficult to deduce or copy the master key's tooth pattern by reverse engineering a single engineered key, fundamentally improving anti-copying capabilities. Furthermore, the multiple independently coded pins significantly increase the complexity of technical unlocking, making it difficult for unlockers to simultaneously perceive and control the status of all engineered pins, thereby significantly improving the overall anti-technical unlocking performance of the lock.

[0028] Specifically, when the engineering pin is in the second position, it is arranged side by side with the lock core pin in the main pin hole.

[0029] In this embodiment, on the cross-section of the lock cylinder, the engineered pins and conventional lock cylinder pins are arranged parallel to each other, forming a complete locking interface. This "side-by-side arrangement" makes the internal structure of the lock cylinder more compact and the force distribution more even. When the master key is inserted, its thrust on all pins (including lock cylinder pins and engineered pins) acts on a continuous plane, resulting in smoother operation and higher stability.

[0030] Specifically, the engineering projectile includes an engineering sealing bead 8, an engineering spring 9, an engineering middle projectile 10, an engineering steel ball 11, and an engineering body 12 arranged in sequence. The ends of the engineering middle projectile and the engineering body are provided with a flat surface 13 that abuts against the engineering steel ball.

[0031] In this embodiment, compared with inclined plane contact, planar contact makes the force transmission between the engineering steel ball and the engineering projectile / body vertical and direct, avoiding the component force and uncertainty that may be generated by inclined plane contact, and ensuring the accuracy and consistency of the projectile movement when switching permissions.

[0032] This application also provides an engineering key for an engineering key system of a high-security lock, wherein the tooth coding of the engineering key is configured to simultaneously position at least three engineering pins with different length codes in a first position within its engineering pin holes.

[0033] In this embodiment, the tooth shape of the engineering key is capable of simultaneously and accurately positioning three or more engineering tumblers with different length codes at the first position.

[0034] This application also provides a master key for an engineering key system of a high-security lock, wherein the master key's toothed coding is configured to push at least three engineering pins from a first position within their engineering pin holes to a second position in which a portion of them enters the lock housing.

[0035] In this embodiment, the tooth-shaped code of the master key is designed to push all the engineering pins in the first position to the second position to achieve the cancellation of permissions.

[0036] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A high-security lock engineering key system, comprising a lock housing, a lock cylinder rotatably disposed within the lock housing, a master key, and an engineering key, characterized in that: The lock cylinder is provided with at least one main pin hole for accommodating lock cylinder pins, and at least three engineering pin holes for accommodating engineering pins. The engineering pin hole is configured to have a first position located inside the lock cylinder and a second position located at the junction of the lock cylinder and the lock case; At least three engineering projectiles with different length codes are movably accommodated within the engineering projectile holes; The engineering key is configured such that when it is inserted into the lock cylinder, it can simultaneously position at least three engineering pins at the first position of the engineering pin hole, at which time the engineering key has unlocking authority. The master key is configured such that, when inserted into the lock cylinder, it can push the at least three engineering pins from the first position to the second position, in which a portion of the engineering pins enters the lock housing, thereby disabling the engineering key.

2. The engineering key system for the high-security lock according to claim 1, characterized in that: When the engineering pin is in the second position, it is arranged side by side with the lock cylinder pin in the main pin hole.

3. The engineering key system for the high-security lock according to claim 1, 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.

4. An engineering key for use in an engineering key system of a high-security lock as described in any one of claims 1 to 3, characterized in that: The toothed coding of the engineering key is configured to simultaneously position at least three engineering pins with different length codes in the first position within its engineering pin holes.

5. A master key for use in an engineering key system for a high-security lock as described in any one of claims 1 to 3, characterized in that: The master key's toothed coding is configured to push at least three engineering pins from a first position within their engineering pin holes to a second position, in which a portion of the pins are inserted into the lock case.

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