Multi-pin cylinder lock
Patent Information
- Application Number
- CN202521585349.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-28
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-07-28
AI Technical Summary
[0005]技术性盗开时，由于无法事先知晓某个锁头个体内的锁定弹子组自动找平的位置或锁芯与驱动装置的连接方式(不同找平位置或不同连接方式的锁头等量生产)，因此只能在N-1种可能的找平位置中逐一尝试；在每次尝试常规弹子组找平的过程中(锁定弹子组已自动在某个位置找平)，由于任意两个相邻弹子的接触面均可与任意两个相邻锁芯的接触面找平，因此常规弹子组与锁芯接触面找平的位置也有N-1种可能，推拉钢丝、拨压弹子的时候，即使某个/些常规弹子组实现了找平，也难以判断找平的位置究竟在哪里、是否与锁定弹子组自动找平的位置(称为预定找平位置)相同，只要任意一个常规弹子组未能与预定找平位置实现找平，仍然无法开锁(或闭锁)；如果拨压过程中某一弹子组未与预定找平位置实现找平而是与其他锁芯接触面找平，则必须先将该弹子组复位，再重新拨压，但该弹子组复位时，其他已经与预定位置找平的弹子组也会随之复位，导致前功尽弃。这就大大增加了技术开锁的难度、降低了技术开锁的速度。
Smart Images
Figure CN224885329U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lock, and more particularly to a multi-cylinder anti-theft lock head. Background Technology
[0002] Most commonly used pin tumbler locks have inner and outer lock cylinders. Only the inner lock cylinder is connected to the unlocking / closing drive mechanism. For technical unlocking, it's sufficient to level the contact surfaces of all pin tumblers with the inner and outer lock cylinders (leveling the contact surfaces of any two adjacent pins in a pin tumbler group with the contact surfaces of two adjacent lock cylinders is called leveling the contact surfaces of that pin tumbler group with those two lock cylinders). Using tools like a wire to press the pins, once the contact surfaces of the pin tumbler group with the lock cylinder are leveled, the leveled position will definitely be the contact surfaces of the inner and outer lock cylinders; there will be no other possibility. This easily achieves the goal of technical unlocking. By simultaneously pushing and pulling the wire or other tools while pressing the pins, multiple pin tumbler groups can be leveled with the contact surfaces of the inner and outer lock cylinders in a single push-pull and pressing motion, making unlocking even faster. Summary of the Invention
[0003] To overcome the shortcomings of commonly used pin tumbler locks being easily opened by technical means, this utility model provides a multi-core anti-theft lock head. This lock head adopts a multi-layered, nested structure of lock cores. Different individual lock heads can select different layers of lock cores (excluding the outer lock core) to connect with the opening / closing drive device. The locking pin group, which is not subject to human manipulation, automatically levels with the contact surface of the lock core connected to the drive device and its adjacent outer lock core. It cannot level with other positions. The lock cores on the inner and outer sides of the leveled contact surface are locked with the inner lock core or the outer lock core as two wholes (the internal parts of each whole cannot rotate relative to each other). The inner whole (including the lock core connected to the drive device) is not restricted from rotating relative to the outer whole. Therefore, when unlocking, it is only necessary to level the contact surface of the conventional pin group with the contact surface of the lock core connected to the drive device and its adjacent outer lock core (i.e., the position where the locking pin group automatically levels, i.e., the contact surface between the inner and outer wholes), thereby releasing the restriction of the conventional pin group on the inner whole.
[0004] The technical solution adopted in this utility model is as follows: a multi-lock cylinder anti-theft lock head, composed of multiple layers (assuming N layers, N≥3) of nested lock cylinders, including an inner lock cylinder, a secondary inner lock cylinder, ... (middle lock cylinder) ..., a secondary outer lock cylinder, and an outer lock cylinder. One of the lock cylinders other than the outer lock cylinder can be randomly selected and connected to the drive device (there are N-1 ways to connect the lock cylinder to the drive device). It includes a conventional pin tumbler group, a locking pin tumbler group, and a matching key. Each conventional pin tumbler group is equipped with multiple pins, including inner pins, secondary inner pins, ... (middle pins) ..., secondary outer pins, and outer pins, and corresponding pin holes. The inner pin holes are connected to the keyhole, allowing the conventional pin tumbler group to be manually manipulated. At least one locking pin tumbler group is provided. Each locking pin tumbler group is located between any two adjacent conventional pin tumbler groups within the cross-section of the same lock cylinder, and is equipped with the same number of pins and pin holes as the conventional pin tumbler groups. Its inner pin holes are blind holes from the outside in (but if there is not enough space between the conventional pin tumbler groups to accommodate the locking pin tumbler group, then...). By modifying any conventional pin tumbler assembly into a locking pin tumbler assembly (i.e., changing its inner pin holes into blind holes from the outside in), the locking pin tumbler assembly is not subject to manual manipulation, but automatically levels itself with the contact surface of the lock cylinder connected to the drive device and its adjacent outer lock cylinder (there are N-1 possible levels). It cannot level itself with the contact surface of other lock cylinders. The lock cylinders on the inner and outer sides of the leveled contact surface are locked as two separate units with the inner or outer lock cylinder (the internal parts of each unit cannot rotate relative to each other), and the rotation of the inner unit (including the lock cylinder connected to the drive device) relative to the outer unit is not restricted. After the matching key is inserted, its teeth must be able to push each conventional pin tumbler assembly to also level itself with the leveled contact surface (i.e., the contact surface of the locking pin tumbler assembly that is automatically leveled, i.e., the contact surface of the lock cylinder connected to the drive device and its adjacent outer lock cylinder), thus releasing the restriction of the conventional pin tumbler assembly on the inner unit. Only then can the key drive the inner lock cylinder to rotate arbitrarily, realizing the locking / unlocking.
[0005] When technically breaking a lock, since it's impossible to know in advance the automatic leveling position of the locking pin group within a specific lock cylinder or the connection method between the lock cylinder and the drive mechanism (lock cylinders with different leveling positions or connection methods are produced in equal batches), one can only try each of the N-1 possible leveling positions. During each attempt to level the regular pin group (where the locking pin group has already automatically leveled at a certain position), since the contact surfaces of any two adjacent pins can level with the contact surfaces of any two adjacent lock cylinders, the leveling position of the regular pin group's contact surface with the lock cylinder also has N-1 possibilities, including pushing and pulling the steel wire, and pressing the pins. Even if some or all the regular pin tumblers achieve leveling, it's difficult to determine exactly where the leveling position is or whether it matches the automatically leveled position of the locking pin tumblers (called the predetermined leveling position). If any regular pin tumbler fails to level with the predetermined leveling position, the lock cannot be opened (or locked). If, during the pressing process, a pin tumbler fails to level with the predetermined leveling position but instead levels with the contact surface of another lock cylinder, the pin tumbler must be reset before pressing again. However, when the pin tumbler resets, the other pin tumblers that have already leveled with the predetermined position will also reset, rendering the entire process futile. This significantly increases the difficulty and slows down the technical unlocking process. Attached Figure Description
[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0007] Figure 1 This is a cross-sectional view of the lock head when a cross-shaped key is inserted in a structure with four lock cylinders and the outermost lock cylinder connected to the drive device.
[0008] In the diagram: 1. Inner lock cylinder, 2. Secondary inner lock cylinder, 3. Secondary outer lock cylinder, 4. Outer lock cylinder, 5. Inner pin, 6. Secondary inner pin, 7. Secondary outer pin, 8. Outer pin, 9. Spring, 10. Protective sleeve, 11. Anti-drilling plate, 12. Key (cross-shaped).
[0009] Figure 2 yes Figure 1 Schematic diagram of the AA section
[0010] In the diagram, 13. Blind hole
[0011] Figure 3 This is a cross-sectional view of the lock head when a cross-shaped key is inserted in a four-layer lock cylinder structure with the innermost lock cylinder connected to the drive mechanism.
[0012] In the diagram: 1. Inner lock cylinder, 2. Secondary inner lock cylinder, 3. Secondary outer lock cylinder, 4. Outer lock cylinder, 5. Inner pin, 6. Secondary inner pin, 7. Secondary outer pin, 8. Outer pin, 9. Spring, 10. Protective sleeve, 11. Anti-drilling plate, 12. Key (cross-shaped).
[0013] Figure 4 yes Figure 3Schematic diagram of the BB cross section
[0014] In the diagram, 13. Blind hole
[0015] Figure 5 This is a cross-sectional diagram of a lock head with a cross-shaped key inserted in a three-layer lock cylinder structure where the inner cylinder is connected to the drive mechanism. The components are: 1. Inner lock cylinder; 2. Secondary inner lock cylinder (also called middle lock cylinder); 4. Outer lock cylinder; 5. Inner pin; 6. Secondary inner pin (also called middle pin); 8. Outer pin; 9. Spring; 10. Protective sleeve; 11. Anti-drilling plate; 12. Key (cross-shaped).
[0016] Figure 6 yes Figure 5 Schematic diagram of the CC section
[0017] In the diagram, 13. Blind hole
[0018] Figure 7 This is a cross-sectional view of the lock head when a single-sided key is inserted in a three-layer lock cylinder structure with the innermost lock cylinder (also known as the middle lock cylinder) connected to the drive device.
[0019] In the diagram: 1. Inner lock cylinder, 2. Secondary inner lock cylinder (also known as middle lock cylinder), 4. Outer lock cylinder, 5. Inner pin, 6. Secondary inner pin (also known as middle pin), 8. Outer pin, 9. Spring, 10. Protective sleeve, 11. Anti-drilling plate, 12. Key (single-sided flat key).
[0020] Figure 8 yes Figure 7 Schematic diagram of the DD section
[0021] In the diagram, 13. Blind hole
[0022] Figure 9 yes Figure 7 Schematic diagram of EE cross section Detailed Implementation
[0023] The first embodiment uses a four-layer lock cylinder structure and a cross-shaped key, therefore there are three ways to connect the lock cylinder and the drive device, among which... Figure 1 , Figure 2 This is the case where the external lock cylinder is connected to the drive device. Figure 3 , Figure 4 This is the case where the inner lock cylinder is connected to the drive device (the third case: the inner lock cylinder is connected to the drive device, and so on).
[0024] Figure 1 , Figure 2 In the middle, the inner lock cylinder 1, the secondary inner lock cylinder 2, the secondary outer lock cylinder 3, and the outer lock cylinder 4 are nested layer by layer. The secondary outer lock cylinder 3 is connected to the drive device (e.g., Figure 1A locking pin group (at blind hole 13) is set in the cross-section of the rearmost lock cylinder. It automatically aligns with the contact surfaces of the secondary outer lock cylinder 3 and the outer lock cylinder 4, but cannot align with the contact surfaces of other lock cylinders (such as...). Figure 2 The inner lock cylinder 1, secondary inner lock cylinder 2, and secondary outer lock cylinder 3 are locked together as a single unit (inner unit), while the outer lock cylinder 4 forms a separate unit (outer unit). After inserting the cross-shaped key 12, its teeth push each conventional pin group to level with the contact surfaces of the secondary outer lock cylinder 3 and the outer lock cylinder 4 (e.g., Figure 1 , Figure 2 When the key 12 is engaged, it can drive the inner lock cylinder 1, the secondary inner lock cylinder 2, and the secondary outer lock cylinder 3 to rotate together, thereby unlocking (or locking).
[0025] Figure 3 , Figure 4 In the middle, the inner lock cylinder 1, the secondary inner lock cylinder 2, the secondary outer lock cylinder 3, and the outer lock cylinder 4 are nested layer by layer. The secondary inner lock cylinder 2 is connected to the drive device (e.g., Figure 3 A locking tumbler assembly is installed within the rearmost lock cylinder cross-section. This assembly automatically aligns with the contact surfaces of the inner lock cylinder 2 and the outer lock cylinder 3, but cannot align with the contact surfaces of other lock cylinders (e.g., ...). Figure 4 The inner lock cylinder 1 and the secondary inner lock cylinder 2 are locked as a single unit (inner unit), and the secondary outer lock cylinder 3 and the outer lock cylinder 4 are also locked as a single unit (outer unit). After inserting the cross-shaped key 12, its teeth push each conventional pin group to level with the contact surfaces of the secondary inner lock cylinder 2 and the secondary outer lock cylinder 3 (e.g., Figure 3 , Figure 4 If the key 12 is used, it can drive the inner lock cylinder 1 and the secondary inner lock cylinder 2 to rotate together, thereby unlocking (or locking).
[0026] The second embodiment uses a three-layer lock cylinder structure and a cross-shaped key, therefore there are two ways to connect the lock cylinder and the drive device. Figure 5 , Figure 6 This refers to the case where the inner lock cylinder is connected to the drive device (the second case is where the secondary inner lock cylinder (also known as the middle lock cylinder) is connected to the drive device, and so on).
[0027] Figure 5 , Figure 6 In the middle, the inner lock cylinder 1, the secondary inner lock cylinder 2 (also called the middle lock cylinder), and the outer lock cylinder 4 are nested layer by layer. The inner lock cylinder 1 is connected to the drive device (e.g., Figure 5 A locking tumbler assembly is installed within the rearmost lock cylinder cross-section. This assembly automatically aligns with the contact surfaces of inner lock cylinder 1 and secondary inner lock cylinder 2, but cannot align with the contact surfaces of other lock cylinders (e.g., ...). Figure 6 This locks the secondary inner lock cylinder 2 and the outer lock cylinder 4 into a single unit (the outer unit), while the inner lock cylinder 1 remains a separate unit (the inner unit). After inserting the cross-shaped key 12, its teeth push each conventional pin group to level with the contact surfaces of the inner lock cylinder 1 and the secondary inner lock cylinder 2 (e.g., ...). Figure 5 , Figure 6 If the key 12 is used, it can drive the inner lock cylinder 1 to rotate, thereby unlocking (or locking).
[0028] The third embodiment uses a three-layer lock cylinder structure and a single-sided key, therefore there are two ways to connect the lock cylinder and the drive device. Figure 7 , Figure 8 , Figure 9 This refers to the case where the inner lock cylinder (also known as the middle lock cylinder) is connected to the drive device (the second case: the inner lock cylinder is connected to the drive device, which can be deduced by analogy).
[0029] Figure 7 , Figure 8 , Figure 9 In the middle, the inner lock cylinder 1, the secondary inner lock cylinder 2 (also called the middle lock cylinder), and the outer lock cylinder 4 are nested layer by layer. The secondary inner lock cylinder 2 is connected to the drive device (e.g., Figure 7 Due to space constraints, the frontmost conventional pin tumbler assembly was modified into a locking pin tumbler assembly. This automatically aligns with the contact surfaces of the inner lock cylinder 2 and the outer lock cylinder 4, but cannot align with the contact surfaces of other lock cylinders (e.g., ...). Figure 8 The inner lock cylinder 1 and the secondary inner lock cylinder 2 are locked together as a single unit (inner unit), while the outer lock cylinder 4 is a separate unit (outer unit). After inserting the flat-head (single-sided) key 12, its teeth push each conventional pin group to level with the contact surfaces of the secondary inner lock cylinder 2 and the outer lock cylinder 4 (e.g., Figure 7 , Figure 9 If the key 12 is used, it can drive the inner lock cylinder 1 and the secondary inner lock cylinder 2 to rotate together, thereby unlocking (or locking).
Claims
1. Multi-cylinder anti-theft lock cylinder, characterized by: It consists of at least three nested multi-layer lock cylinders, with one of the lock cylinders (excluding the main lock cylinder) connected to the opening / closing drive mechanism. It is equipped with a standard tumbler group, a locking tumbler group, and a matching key. Each conventional pin tumbler group is configured with multiple pins and corresponding pin holes. The inner pin holes are connected to the keyhole, so the conventional pin tumbler group can be manually manipulated. At least one locking pin tumbler group is provided, configured with the same number of multiple pins and pin holes as the conventional pin tumbler group. Its inner pin holes are blind holes from the outside in, so they are not manually manipulated, but automatically level with the contact surface of the lock cylinder connected to the drive device and its adjacent lock cylinder on the outside. The contact surface with other lock cylinders cannot be leveled. The lock cylinders on the inner and outer sides of the leveled contact surface are locked to the inner lock cylinder or the outer lock cylinder as two wholes, and the inner whole, including the lock cylinder connected to the drive device, is not restricted from rotating relative to the outer whole.
2. The multi-cylinder anti-theft lock cylinder according to claim 1, characterized in that, Each locking pin group is located between any two adjacent conventional pin groups within the cross-section of the same lock cylinder. However, if there is not enough space between the conventional pin groups to accommodate the locking pin group, any conventional pin group will be converted into a locking pin group, that is, its inner pin hole will be converted into a blind hole from the outside in.
3. The multi-cylinder anti-theft lock cylinder according to claim 1, characterized in that, After the matching key is inserted, its teeth must be able to push each conventional pin group to automatically level the contact surface with the locking pin group—that is, the contact surface between the lock cylinder connecting the drive device and its adjacent outer lock cylinder—in order to drive the inner lock cylinder to rotate arbitrarily and achieve opening / closing.