A self-locking lock cylinder
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-08-14
AI Technical Summary
由于现有锁芯未设置有效的自锁隔离机制，不法分子可通过操作残留的锁芯拨轮或传动组件，直接驱动锁芯拨轮转动以实现非法开锁；更严重的是，部分锁芯的室外与室内传动结构联动性过强，室外锁体被破坏后会直接导致室内锁胆的传动路径失效，造成室内人员无法通过正常钥匙开启门锁，存在被困风险
1、当室外锁体被暴力折断、室外锁胆与转动片一同拔出时，室外锁芯离合转子内的自锁片会在重力（或自锁弹簧弹力）作用下，从容纳腔落入拨轮连接件底部的自锁方孔中，直接锁定室外锁芯离合转子的位置。该锁定状态可阻止室外锁芯离合转子推入锁芯拨轮并与之啮合，彻底切断不法分子通过转动残留部件驱动锁芯拨轮的传动路径，有效杜绝暴力破坏室外锁体后开锁的操作。
Smart Images
Figure CN224634432U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lock cylinder technology, and in particular to a self-locking lock cylinder. Background Technology
[0002] In the security field, the lock cylinder, as the core transmission and protection component of a door lock, directly determines the lock's ability to resist unauthorized entry. Currently, most conventional lock cylinders on the market adopt a symmetrical transmission structure, with the outdoor and indoor lock cylinders using the same set of dial transmission components for unlocking operations, lacking specific designs to prevent forced entry.
[0003] When criminals use force (such as crowbars or hammers) to break the exterior lock body, they often damage the exterior lock cylinder and its connected rotating transmission components. Because existing lock cylinders lack an effective self-locking isolation mechanism, criminals can directly drive the lock cylinder's dial to rotate and illegally unlock it by manipulating any remaining cylinder dials or transmission components. More seriously, some lock cylinders have overly strong linkages between the exterior and interior transmission structures; damage to the exterior lock body can directly cause the transmission path of the interior lock cylinder to fail, preventing occupants from opening the door with a normal key and posing a risk of entrapment. In summary, existing lock cylinders lack dual protection against both unlocking and interior security when facing violent attacks, and their overall security performance needs improvement. Utility Model Content
[0004] The purpose of this invention is to provide a self-locking lock cylinder. This invention enables the outdoor lock cylinder's clutch rotor to self-lock inside the dial wheel connector after the outdoor lock cylinder is forcibly damaged, thereby preventing attempts to forcibly unlock the door by breaking the lock cylinder. Simultaneously, damage to the outdoor lock cylinder does not affect the indoor lock cylinder, avoiding the consequence of the door being unable to be opened from the inside, thus offering the advantage of high security.
[0005] The technical solution of this utility model is as follows: A self-locking lock cylinder includes a lock body, with an outdoor lock cylinder and an indoor lock cylinder respectively provided on both sides of the lock body, and a lock cylinder dial wheel provided in the middle of the lock body; a dial wheel connector is provided on the lock body between the outdoor lock cylinder and the lock cylinder dial wheel; a rotating plate passing through the dial wheel connector is provided at the front end of the outdoor lock cylinder; an outdoor lock cylinder clutch rotor for driving the lock cylinder dial wheel to rotate is provided at the front end of the dial wheel connector, the outdoor lock cylinder clutch rotor is provided with a vertically downward receiving cavity communicating with the outside, a self-locking plate is provided in the receiving cavity, and a flat hole is provided on the self-locking plate; a stop is provided at the bottom of the front end of the rotating plate; a through hole communicating with the receiving cavity is provided on one side of the outdoor lock cylinder clutch rotor; the stop of the rotating plate passes through the through hole and extends to the outside of the flat hole; a self-locking square hole is provided at the bottom of the dial wheel connector below the self-locking plate.
[0006] In the aforementioned self-locking lock cylinder, spring posts are symmetrically arranged at the upper end of the self-locking plate, and a self-locking spring is sleeved on the spring post. The upper end of the self-locking spring abuts against the top of the receiving cavity.
[0007] In the aforementioned self-locking lock cylinder, a step portion for preventing prying is provided at the lower end of one side of the self-locking plate.
[0008] In the aforementioned self-locking lock cylinder, the front side of the dial connector is provided with an annular portion, and the upper end of the annular portion is provided with a first positioning groove; the self-locking square hole is provided at the bottom of the annular portion; and the upper end of the outdoor lock cylinder clutch rotor is provided with a first clutch protrusion for cooperating with the first positioning groove.
[0009] In the aforementioned self-locking lock cylinder, the front end of the rotating plate is U-shaped; one side of the outdoor lock cylinder clutch rotor is provided with a first limiting groove that matches the front end of the rotating plate.
[0010] The aforementioned self-locking lock cylinder has a first sliding cavity at the front end of the outdoor lock cylinder for the rotating plate to slide back and forth, and a second limiting groove at the upper end of the first sliding cavity for limiting the sliding of the rotating plate; the inner wall of the lock cylinder dial is provided with a second positioning groove for cooperating with the first clutch protrusion.
[0011] In the aforementioned self-locking lock cylinder, the front end of the interior lock cylinder is provided with a lock cylinder cavity, and the upper end of the lock cylinder cavity is provided with a third limiting groove; an interior key push rod is provided in the lock cylinder cavity, and the front end of the interior key push rod is fitted with an interior lock cylinder clutch rotor that abuts against the clutch rotor of the exterior lock cylinder; the upper end of the interior lock cylinder clutch rotor is provided with a second clutch protrusion for cooperating with the second positioning groove and the third limiting groove; a return spring is fitted on the front end of the interior key push rod, and one end of the return spring is connected to the interior lock cylinder clutch rotor.
[0012] In the aforementioned self-locking lock cylinder, a rubber sealing sheet is provided between the rotating plate and the dial wheel connector.
[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When the outdoor lock body is forcibly broken and the outdoor lock cylinder and rotating disc are pulled out together, the self-locking disc inside the outdoor lock cylinder clutch rotor will fall from the receiving cavity into the self-locking square hole at the bottom of the dial wheel connector under the action of gravity (or the elasticity of the self-locking spring), directly locking the position of the outdoor lock cylinder clutch rotor. This locking state can prevent the outdoor lock cylinder clutch rotor from being pushed into the lock cylinder dial wheel and engaging with it, completely cutting off the transmission path for criminals to drive the lock cylinder dial wheel by rotating the remaining parts, effectively preventing the operation of unlocking after forcibly damaging the outdoor lock body.
[0014] 2. This utility model adopts a design where the outdoor and indoor transmission structures are relatively independent: when the outdoor lock cylinder and related components (rotating plate, outdoor lock cylinder clutch rotor) are damaged, the indoor lock cylinder cavity, indoor key push rod, indoor lock cylinder clutch rotor, and other components are unaffected. Indoor personnel can insert the key normally, and unlocking is achieved through the cooperation of the indoor lock cylinder clutch rotor and the lock cylinder dial, completely avoiding the risk of the entire house being locked due to damage to the outdoor lock cylinder, thus ensuring the escape and normal door opening needs of indoor personnel.
[0015] 3. The self-locking plate of this utility model is symmetrically equipped with spring posts and self-locking springs at its upper end, and the upper end of the self-locking springs abuts against the top of the receiving cavity. When the rotating plate is pulled out, the elastic force of the self-locking springs can quickly push the self-locking plate out of the receiving cavity and into the self-locking square hole. Compared with the self-locking structure that relies solely on gravity, the response speed is faster, and the locking can be completed before criminals attempt to operate the remaining parts, further reducing the window for illegal operation. In addition, the stepped part provided at the lower end of one side of the self-locking plate can form an anti-pry latch after the self-locking plate falls into the self-locking square hole. If criminals attempt to pry the self-locking plate with a tool, the forward pushing force applied by the tool will cause the self-locking plate to stick tightly to the inner wall of the self-locking square hole, while the stepped part is tightly latched with the lower end face of the self-locking square hole, preventing the self-locking plate from being pried up or moved out. Structurally, this eliminates the possibility of unlocking the self-locking component by prying after damage, and the security level is significantly improved. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is a schematic diagram of the structure of the outdoor lock cylinder and the dial connecting piece; Figure 4 This is a schematic diagram of the rotating plate. Figure 5 This is a schematic diagram of the outdoor lock cylinder clutch rotor; Figure 6 This is a schematic diagram of the self-locking plate; Figure 7 This is a structural schematic diagram of the dial connector; Figure 8 This is a schematic diagram of the lock cylinder dial; Figure 9 This is a structural diagram of an indoor lock cylinder.
[0017] Figure Labels 1. Lock body; 2. Outdoor lock cylinder; 3. Indoor lock cylinder; 4. Lock cylinder dial; 5. Dial connecting piece; 6. Rotating plate; 7. Outdoor lock cylinder clutch rotor; 8. Receiving cavity; 9. Self-locking plate; 10. Flat hole; 11. Stop; 12. Through hole; 13. Self-locking square hole; 14. Spring post; 15. Self-locking spring; 16. Stepped part; 17. Annular part; 18. First positioning groove; 19. First clutch protrusion; 20. First limiting groove; 21. First sliding cavity; 22. Second limiting groove; 23. Second positioning groove; 24. Lock cylinder cavity; 25. Third limiting groove; 26. Indoor key push rod; 27. Indoor lock cylinder clutch rotor; 28. Second clutch protrusion; 29. Return spring; 30. Rubber sealing plate. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0019] Example: A self-locking lock cylinder, such as Figure 1-3 As shown, the lock includes a lock body 1, with an outdoor lock cylinder 2 and an indoor lock cylinder 3 on both sides of the lock body 1, used for inserting outdoor and indoor keys respectively; a lock cylinder derailleur 4 is provided in the middle of the lock body 1, which cooperates with the latch on the outer door frame to lock the door; a derailleur connector 5 is provided on the lock body 1 between the outdoor lock cylinder 2 and the lock cylinder derailleur 4; as shown Figure 2 and Figure 4 As shown, the front end of the outdoor lock cylinder 2 is provided with a rotating plate 6 that passes through the dial wheel connector 5. A rubber sealing plate 30 is provided between the rotating plate 6 and the dial wheel connector 5. The sealing plate 30 is used to prevent water and glue from entering, thus avoiding the possibility of water or other liquids being injected into the lock cylinder before it is forcibly broken, which could then be used to quickly freeze the lock with liquid nitrogen to unlock it or cause it to fail. Figure 3 and Figure 5 As shown, the front end of the dial connecting member 5 is provided with an outdoor lock cylinder clutch rotor 7 for driving the lock cylinder dial 4 to rotate. The outdoor lock cylinder clutch rotor 7 is provided with a vertically downward-facing receiving cavity 8 that communicates with the outside. A self-locking plate 9 is provided in the receiving cavity 8, and a flat hole 10 is provided on the self-locking plate 9. Figure 6As shown; a stop 11 is provided at the bottom front end of the rotating plate 6; a through hole 12 communicating with the receiving cavity 8 is provided on one side of the outdoor lock cylinder clutch rotor 7; the stop 11 of the rotating plate 6 passes through the through hole 12 and extends to the outside of the flat hole 10; a self-locking square hole 13 located below the self-locking plate 9 is provided at the bottom of the dial wheel connector 5. In this embodiment, when the lock body 1 is not damaged, the self-locking plate 9 inside the outdoor lock cylinder clutch rotor 7 is blocked by the stop 11 of the rotating plate in the receiving cavity 8 of the outdoor lock cylinder clutch rotor 7. At this time, the key is inserted into the outdoor lock cylinder 2. The rotation of the outdoor lock cylinder 2 will drive the rotating plate to rotate, the rotation of the rotating plate will drive the outdoor lock cylinder clutch rotor 7 to rotate, and the rotation of the outdoor lock cylinder clutch rotor 7 will drive the lock cylinder dial wheel 4 to rotate, thereby realizing the opening and closing of the door lock. However, when the lock body 1 is forcibly broken, the broken lock body 1 will pull out the outdoor lock cylinder 2 and the rotating plate on the same side. After the rotating plate is pulled out, the self-locking plate 9 inside the outdoor lock cylinder clutch rotor 7 falls from the receiving cavity 8 into the self-locking square hole 13 below the dial wheel connector 5 under the action of gravity, so that the self-locking plate 9 is locked in the dial wheel connector 5, preventing the outdoor lock cylinder clutch rotor 7 from being pushed into the lock cylinder dial wheel 4 and engaging with the lock cylinder dial wheel 4. This restricts the attempt to break the outdoor lock cylinder body to achieve the intention of turning the lock cylinder dial wheel 4 to unlock. At the same time, since the lock cylinder of the indoor lock cylinder is not damaged, it ensures that the indoor lock cylinder can still work normally after the outdoor lock cylinder is broken. Therefore, this utility model can prevent forced unlocking by breaking the lock body 1. At the same time, the damage to the outdoor lock cylinder 2 will not affect the lock cylinder on the inside of the door, avoiding the consequence that the inside of the door cannot be opened. It has the advantage of good security.
[0020] Preferably, such as Figure 6 As shown, spring posts 14 are symmetrically arranged on the upper end of the self-locking plate 9, and self-locking springs 15 are sleeved on the spring posts 14. The upper end of the self-locking springs 15 abuts against the top of the receiving cavity 8. When the rotating plate is pulled out, the self-locking plate 9 inside the outdoor lock cylinder clutch rotor 7 is pushed out of the receiving cavity 8 of the outdoor lock cylinder clutch rotor 7 under the elastic force of the two self-locking springs 15, so that it can enter the self-locking square hole 13 more quickly and achieve more efficient self-locking.
[0021] Preferably, such as Figure 6 and Figure 7 As shown, a step 16 for preventing prying is provided at the lower end of one side of the self-locking piece 9. When the self-locking piece 9 falls into the self-locking square hole 13, if an external person tries to pry the self-locking piece 9 with a tool, the external tool will generate a forward thrust on the self-locking piece 9. This thrust will cause the self-locking piece 9 to press tightly against the inner wall of the self-locking square hole 13, and the step 16 will engage with the lower end face of the self-locking square hole 13. This prevents the self-locking piece 9 from being pried up, thereby preventing the self-locking piece 9 from being unlocked by pulling it upwards with a tool from the outside while it is in the self-locked state.
[0022] Preferably, such as Figure 7 As shown, the front side of the dial connector 5 is provided with an annular portion 17, and the upper end of the annular portion 17 is provided with a first positioning groove 18; the self-locking square hole 13 is provided at the bottom of the annular portion 17; the annular portion 17 on the dial connector 5 is embedded into the lock cylinder dial 4, making the fit between the two more tight and reliable. The upper end of the outdoor lock cylinder clutch rotor 7 is provided with a first clutch protrusion 19 for cooperating with the first positioning groove 18. The interaction between the first positioning groove 18 and the first clutch protrusion 19 can prevent the outdoor lock cylinder clutch rotor 7 from rotating arbitrarily.
[0023] Preferably, such as Figure 4 and Figure 5 As shown, the front end of the rotating plate 6 is U-shaped; one side of the outdoor lock cylinder clutch rotor 7 is provided with a first limiting groove 20 that matches the front end of the rotating plate 6. The mutual locking between the first limiting groove 20 and the front end of the rotating plate 6 improves the installation stability of the rotating plate 6.
[0024] Preferably, such as Figure 2 and Figure 3 As shown, the front end of the outdoor lock cylinder 2 is provided with a first sliding cavity 21 for the rotating plate 6 to slide back and forth, and the upper end of the first sliding cavity 21 is provided with a second limiting groove 22 for limiting the sliding of the rotating plate 6; the inner wall of the lock cylinder dial 4 is provided with a second positioning groove 23 for cooperating with the first clutch protrusion 19. When the key is inserted into the outdoor lock cylinder 2, it will push the rotating plate 6 to slide along the second limiting groove 22, thereby pushing the outdoor lock cylinder clutch rotor 7 forward, so that the first clutch protrusion 19 on the outdoor lock cylinder clutch rotor 7 disengages from the first positioning groove 18 and is embedded in the second positioning groove 23 on the inner wall of the lock cylinder dial 4, so that when the outdoor lock cylinder clutch rotor 7 is rotated, the lock cylinder dial 4 can be driven to rotate, thereby unlocking.
[0025] Preferably, such as Figure 2 and Figure 9As shown, the front end of the indoor lock cylinder 3 is provided with a lock cylinder cavity 24, and the upper end of the lock cylinder cavity 24 is provided with a third limiting groove 25; an indoor key push rod 26 is provided in the lock cylinder cavity 24, and the front end of the indoor key push rod 26 is fitted with an indoor lock cylinder clutch rotor 27 that abuts against the outdoor lock cylinder clutch rotor 7. The upper end of the indoor lock cylinder clutch rotor 27 is provided with a second clutch protrusion 28 for cooperating with the second positioning groove 23 and the third limiting groove 25. The second clutch protrusion 28 is stepped, and the upper end can cooperate with the second positioning groove 23, and the lower part can cooperate with the third limiting groove 25; a return spring 29 is fitted at the front end of the indoor key push rod 26, and one end of the return spring 29 is connected to the indoor lock cylinder clutch rotor 27. When the door is unlocked from the outside, the outdoor lock cylinder clutch rotor 7 pushes the indoor lock cylinder clutch rotor 27 to compress the return spring 29 and slides along the third limiting groove 25. The second clutch protrusion 28 on the indoor lock cylinder clutch rotor 27 disengages from the second positioning groove 23. After the key is removed from the outside, due to the action of the return spring 29, the indoor lock cylinder clutch rotor 27 moves forward, causing the second clutch protrusion 28 to re-embed into the second positioning groove 23. At this time, when the door needs to be opened from the inside, the indoor lock cylinder 3 can be unlocked by inserting the key.
[0026] In summary, this utility model can cause the outdoor lock cylinder clutch rotor 7 to form a self-locking mechanism inside the dial wheel connector 5 after the outdoor lock cylinder 2 is forcibly damaged, thereby preventing the attempt to forcibly unlock the door by breaking the lock cylinder. At the same time, the damage to the outdoor lock cylinder 2 will not affect the indoor lock cylinder 3, avoiding the consequence that the door cannot be opened from the inside, thus having the advantage of good security.
Claims
1. A self-locking lock cylinder, comprising a lock body (1), an outdoor lock cylinder (2) and an indoor lock cylinder (3) respectively provided on both sides of the lock body (1), and a lock cylinder dial wheel (4) provided in the middle of the lock body (1); a dial wheel connector (5) is provided on the lock body (1) between the outdoor lock cylinder (2) and the lock cylinder dial wheel (4); a rotating piece (6) passing through the dial wheel connector (5) is provided at the front end of the outdoor lock cylinder (2); characterized in that: The front end of the dial connector (5) is provided with an outdoor lock cylinder clutch rotor (7) for driving the lock cylinder dial (4) to rotate. The outdoor lock cylinder clutch rotor (7) is provided with a vertically downward and externally connected receiving cavity (8). A self-locking plate (9) is provided in the receiving cavity (8). A flat hole (10) is provided on the self-locking plate (9). A stop (11) is provided at the bottom of the front end of the rotating plate (6). A through hole (12) connected to the receiving cavity (8) is provided on one side of the outdoor lock cylinder clutch rotor (7). The stop (11) of the rotating plate (6) passes through the through hole (12) and extends to the outside of the flat hole (10). A self-locking square hole (13) located below the self-locking plate (9) is provided at the bottom of the dial connector (5).
2. The self-locking lock cylinder according to claim 1, characterized in that: The upper end of the self-locking piece (9) is symmetrically provided with spring posts (14), and a self-locking spring (15) is sleeved on the spring post (14). The upper end of the self-locking spring (15) abuts against the top of the receiving cavity (8).
3. The self-locking lock cylinder according to claim 1, characterized in that: The lower end of one side of the self-locking piece (9) is provided with a step (16) for preventing it from being pushed.
4. The self-locking lock cylinder according to claim 1, characterized in that: The front side of the dial connector (5) is provided with an annular part (17), and the upper end of the annular part (17) is provided with a first positioning groove (18); the self-locking square hole (13) is provided at the bottom of the annular part (17); the upper end of the outdoor lock cylinder clutch rotor (7) is provided with a first clutch protrusion (19) for cooperating with the first positioning groove (18).
5. The self-locking lock cylinder according to claim 1, characterized in that: The front end of the rotating plate (6) is U-shaped; one side of the outdoor lock cylinder clutch rotor (7) is provided with a first limiting groove (20) that matches the front end of the rotating plate (6).
6. The self-locking lock cylinder according to claim 4, characterized in that: The front end of the outdoor lock cylinder (2) is provided with a first sliding cavity (21) for the rotating plate (6) to slide back and forth, and the upper end of the first sliding cavity (21) is provided with a second limiting groove (22) for the sliding limit of the rotating plate (6); the inner wall of the lock cylinder dial (4) is provided with a second positioning groove (23) for cooperating with the first clutch protrusion (19).
7. The self-locking lock cylinder according to claim 6, characterized in that: The front end of the indoor lock cylinder (3) is provided with a lock cylinder cavity (24), and the upper end of the lock cylinder cavity (24) is provided with a third limiting groove (25); the lock cylinder cavity (24) is provided with an indoor key push rod (26), the front end of the indoor key push rod (26) is sleeved with an indoor lock cylinder clutch rotor (27) that abuts against the outdoor lock cylinder clutch rotor (7), and the upper end of the indoor lock cylinder clutch rotor (27) is provided with a second clutch protrusion (28) for cooperating with the second positioning groove (23) and the third limiting groove (25); the front end of the indoor key push rod (26) is sleeved with a return spring (29), and one end of the return spring (29) is connected to the indoor lock cylinder clutch rotor (27).
8. The self-locking lock cylinder according to claim 1, characterized in that: A rubber sealing sheet (30) is provided between the rotating plate (6) and the dial wheel connector (5).