Lock cylinder with anti-drilling structure
By setting a baffle accommodating groove on the outer sleeve of the lock core and installing an anti-drilling blank, the problem of weak and easy damage of the existing lock core material is solved, effective protection of the drill bit is achieved, and the safety and anti-theft performance of the lock are improved.
Patent Information
- Application Number
- CN202421932832.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing lock core material is weak and easily damaged by the drill bit, resulting in insufficient anti-theft performance of the lock.
A lock core with an anti-drill structure is designed. By setting a blank receptacle groove on the outer sleeve and a drill anti-drill receptacle in the blank receptacle groove, the drill bit first contacts the anti-drill receptacle when entering the lock core, preventing the drill bit from entering the lock core.
Effectively prevent the drill bit from causing damage to the internal structure of the lock core, and improve the safety and anti-theft performance of the lock.
Smart Images
Figure CN222909687U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of locks, and particularly relates to a lock core with an anti-drilling structure. Background Art
[0002] The lock core is the main part that controls the opening of the lock and is the heart of the lock. The existing lock cores generally include an outer sleeve and a lock cylinder rotatably arranged inside the outer sleeve. After the key is inserted into the lock core, the lock cylinder rotates with the key and drives the lock bolt to move to achieve the purpose of unlocking. Most of the outer sleeves and lock cylinders of the existing lock cores are made of soft materials such as copper or aluminum alloy. If a criminal uses a drill to directly damage the lock core, the lock can be directly opened. Therefore, how to protect the lock core from being forced to unlock has become a difficult problem in the lock manufacturing industry. Content of the Utility Model
[0003] Aiming at the deficiencies existing in the prior art, the utility model provides a lock core with an anti-drilling structure, which can prevent the drill from damaging the internal structure of the lock core and improve the anti-theft performance of the lock.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A lock core with an anti-drilling structure includes a lock core body and an anti-drilling shim. The lock core body includes an outer sleeve and a lock cylinder rotatably arranged inside the outer sleeve. One end of the outer sleeve is provided with a shim accommodating groove, one end of the lock cylinder is provided with a key insertion port, a key hole is provided in the shim accommodating groove and is opposite to the key insertion port, the anti-drilling shim is arranged in the shim accommodating groove, a lock cover for preventing the anti-drilling shim from falling out is arranged at the opening of the shim accommodating groove, a first through hole opposite to the key hole is arranged on the anti-drilling shim, and a second through hole opposite to the key hole is arranged on the lock cover. By arranging the shim accommodating groove on the outer sleeve and arranging the anti-drilling shim in the shim accommodating groove, when the drill enters the lock core, it first contacts the anti-drilling shim, and the drill cannot enter the interior of the lock core through the anti-drilling shim, preventing the drill from damaging the lock cylinder, thereby improving the safety of the lock.
[0006] As a preferred solution, the cross-sectional shapes of the key hole and the first through hole are both the same as the shape of the key insertion port.
[0007] As a preferred solution, the anti-drilling shim is made of tungsten steel.
[0008] As a preferred solution, a limiting structure for preventing the anti-drilling shim from rotating relative to the outer sleeve is arranged in the shim accommodating groove.
[0009] As a preferred solution, the limiting structure includes a convex block arranged on the anti-drilling shim and a limiting groove arranged in the shim accommodating groove. During assembly, the convex block is embedded in the limiting groove.
[0010] As a preferred solution, there are two bumpers, and the two bumpers protrude from opposite sides of the anti-drilling baffle.
[0011] As a preferred solution, limit blocks are arranged at intervals in the baffle accommodating groove, and a limit groove is formed between two adjacent limit blocks.
[0012] As a preferred solution, it further includes a retaining ring. The retaining ring is provided with a third through hole for the key to pass through. A plurality of arc-shaped positioning blocks are arranged on the inner side of the lock cover. A positioning space adapted to the retaining ring is formed between the arc-shaped positioning blocks. During assembly, the retaining ring is arranged between the lock cover and the anti-drilling baffle, and the retaining ring is embedded in the positioning space.
[0013] As a preferred solution, an inlay block extending downward is arranged at the edge of the lock cover, and an inlay groove corresponding to the inlay block is arranged on the outer sleeve at the outer side of the accommodating groove. During assembly, the lock cover is connected to the outer sleeve by embedding the inlay block into the inlay groove.
[0014] As a preferred solution, it further includes an elastic split ring. A second arc-shaped groove corresponding to the elastic split ring is arranged on the outer side of the inlay block, and a first arc-shaped groove corresponding to the elastic split ring is arranged on the outer sleeve. During assembly, the first arc-shaped groove communicates with the second arc-shaped groove, and the elastic split ring is embedded in the first arc-shaped groove and the second arc-shaped groove.
[0015] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, by arranging a baffle accommodating groove on the outer sleeve and arranging an anti-drilling baffle in the baffle accommodating groove, when the drill bit enters the lock core, it first contacts the anti-drilling baffle, and the drill bit cannot enter the interior of the lock core through the anti-drilling baffle, preventing the drill bit from damaging the lock cylinder, thereby improving the security of the lock.
[0016] To more clearly illustrate the structural features, technical means, and the specific purposes and functions achieved by the utility model, the following further detailed description of the utility model is provided in conjunction with the drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is the assembled structure diagram of the embodiment of the utility model;
[0018] Figure 2 is the exploded structure diagram of the embodiment of the utility model;
[0019] Figure 3 is the exploded structure diagram of the lock cylinder of the embodiment of the utility model;
[0020] Figure 4 is the structure diagram of the lock cover of the embodiment of the utility model.
[0021] Description of the reference numerals in the drawings:
[0022] 10. Outer sleeve, 11. Retaining plate accommodating groove, 12. Key insertion hole
[0023] 13. Limit groove, 14. Limit block, 15. Embedded groove
[0024] 16. First arc-shaped groove, 17. Accommodating cavity, 20. Lock cylinder
[0025] 21. Key insertion port, 30. Anti-drilling retaining plate, 31. First through hole
[0026] 32. Protrusion, 40. Lock cover, 41. Second through hole
[0027] 42. Arc-shaped positioning block, 43. Embedded block, 44. Second arc-shaped groove
[0028] 50. Retaining ring, 51. Third through hole, 60. Elastic split ring Detailed implementation manner
[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.
[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0031] Please refer to Figures 1-4 As shown, a lock core with an anti-drilling structure includes a lock core body and an anti-drilling retaining plate 30. The lock core body includes an outer sleeve 10 and a lock cylinder 20 rotatably arranged inside the outer sleeve 10. One end of the outer sleeve 10 is provided with a retaining plate accommodating groove 11. One end of the lock cylinder 20 is provided with a key insertion port 21. A key insertion hole 12 facing the key insertion port 21 is provided in the retaining plate accommodating groove 11. The anti-drilling retaining plate 30 is arranged in the retaining plate accommodating groove 11. A lock cover 40 for preventing the anti-drilling retaining plate 30 from falling out is provided at the opening of the retaining plate accommodating groove 11. A first through hole 31 facing the key insertion hole 12 is provided on the anti-drilling retaining plate 30. A second through hole 41 facing the key insertion hole 12 is provided on the lock cover 40.
[0032] In the present utility model, the cross-sectional shapes of the key insertion hole 12 and the first through hole 31 are both the same as the shape of the key insertion port 21. The sizes of the first through hole 31 and the key insertion hole 12 are just large enough for the key to pass through, so as not to affect the normal unlocking operation of the key. If they are too large, the drill bit can directly pass through and damage the lock cylinder 20. The anti-drilling flap 30 is made of tungsten steel, so that the hardness of the anti-drilling flap 30 is greater than that of an ordinary drill bit.
[0033] In the present utility model, a limiting structure for preventing the anti-drilling flap 30 from rotating relative to the outer sleeve 10 is provided in the flap accommodating groove 11. The limiting structure includes a convex block 32 provided on the anti-drilling flap 30 and a limiting groove 13 provided in the flap accommodating groove 11. During assembly, the convex block 32 is embedded in the limiting groove 13. Specifically, two convex blocks 32 are provided, and the two convex blocks 32 protrude from opposite sides of the anti-drilling flap 30. Limiting blocks 14 are provided in the flap accommodating groove 11 at intervals, and a limiting groove 13 is formed between two adjacent limiting blocks 14. It should be understood that in actual applications, the convex block 32 can be a structure protruding radially outward along the anti-drilling flap 30, or a structure protruding axially along the anti-drilling flap 30; and, the convex block 32 in the limiting structure can also be provided in the flap accommodating groove 11, and the corresponding limiting groove 13 is provided on the anti-drilling flap 30; and, the number and shape of the convex block 32 and the limiting groove 13 can also be set according to actual needs.
[0034] In the present utility model, a retaining ring 50 is further included. A third through hole 51 for the key to pass through is provided on the retaining ring 50. A plurality of arc-shaped positioning blocks 42 are provided on the inner side of the lock cover 40. A positioning space adapted to the retaining ring 50 is formed between the arc-shaped positioning blocks 42. During assembly, the retaining ring 50 is provided between the lock cover 40 and the anti-drilling flap 30, and the retaining ring 50 is embedded in the positioning space. By providing the retaining ring 50, after the lock cover 40 is installed on the outer sleeve 10, the lock cover 40 presses against the anti-drilling flap 30 through the retaining ring 50 to prevent the anti-drilling flap 30 from loosening.
[0035] Specifically, an elastic split ring 60 is further included. An embedding block 43 extending downward is provided on the edge of the lock cover 40. A corresponding embedding groove 15 is provided on the outer sleeve 10 on the outer side of the accommodating groove. A second arc-shaped groove 44 corresponding to the elastic split ring 60 is provided on the outer side of the embedding block 43. A first arc-shaped groove 16 corresponding to the elastic split ring 60 is provided on the outer sleeve 10. During assembly, the lock cover 40 is connected to the outer sleeve 10 by embedding the embedding block 43 into the embedding groove 15. The first arc-shaped groove 16 is communicated with the second arc-shaped groove 44, and the elastic split ring 60 is embedded in the first arc-shaped groove 16 and the second arc-shaped groove 44.
[0036] In the present utility model, the other end of the outer sleeve 10 is provided with a receiving cavity 17 which has a downward opening. The lock cylinder 20 is installed in the receiving cavity 17 from the opening of the receiving cavity 17. A plurality of lock pieces 22 are provided on the lock cylinder 20. When unlocking, the key pushes the lock pieces 22 to move axially along the lock cylinder 20, and then makes the lock pieces 22 rotate together with the lock cylinder.
[0037] In summary, in the present utility model, by providing a retaining piece receiving groove on the outer sleeve and arranging an anti-drilling retaining piece in the retaining piece receiving groove, when the drill bit enters the lock core, it first contacts the anti-drilling retaining piece, and the drill bit cannot enter the interior of the lock core through the anti-drilling retaining piece, preventing the drill bit from damaging the lock cylinder, thereby improving the security of the lock.
[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the actual technology of the present utility model still fall within the scope of the technical solutions of the present utility model.
Claims
1. A lock core with an anti-drilling structure, characterized in that: The lock core body comprises a lock core body and an anti-drill baffle, wherein the lock core body comprises an outer sleeve and a lock core rotatably arranged in the outer sleeve, one end of the outer sleeve is provided with a baffle accommodating groove, one end of the lock core is provided with a key insertion port, a key insertion hole is provided in the baffle accommodating groove and is opposite to the key insertion port, the anti-drill baffle is arranged in the baffle accommodating groove, a lock cover is provided at the opening of the baffle accommodating groove to prevent the anti-drill baffle from falling out, the anti-drill baffle is provided with a first through hole opposite to the key insertion hole, and the lock cover is provided with a second through hole opposite to the key insertion hole.
2. A lock core with an anti-drilling structure according to claim 1, characterized in that: The cross-sectional shapes of the key insertion hole and the first through hole are the same as the shape of the key insertion port.
3. The lock core with an anti-drilling structure according to claim 1, characterized in that: The anti-drilling baffle is made of tungsten steel.
4. The lock core with an anti-drilling structure according to claim 1, characterized in that: A limiting structure is provided in the baffle accommodating groove to prevent the anti-drilling baffle from rotating relative to the outer sleeve.
5. The lock core with an anti-drilling structure according to claim 4, characterized in that: The limiting structure comprises a protrusion arranged on the anti-drilling baffle and a limiting groove arranged in the baffle accommodating groove. During assembly, the protrusion is embedded in the limiting groove.
6. The lock core with an anti-drilling structure according to claim 5, characterized in that: There are two protrusions, which are protrudingly arranged on two opposite sides of the anti-drilling baffle.
7. A lock core with an anti-drilling structure according to claim 5 or 6, characterized in that: The baffle accommodating groove is provided with spaced-apart limiting blocks, and a limiting groove is formed between two adjacent limiting blocks.
8. The lock core with an anti-drilling structure according to claim 1, characterized in that: It also includes a baffle ring, which is provided with a third through hole for the key to pass through. A plurality of arc-shaped positioning blocks are provided on the inner side of the lock cover, and a positioning space adapted to the baffle ring is formed between the arc-shaped positioning blocks. During assembly, the baffle ring is arranged between the lock cover and the anti-drill baffle, and the baffle ring is embedded in the positioning space.
9. The lock core with an anti-drilling structure according to claim 1, characterized in that: The edge of the lock cover is provided with an embedded block extending downward, and the outer sleeve is provided with an embedded groove corresponding to the embedded block on the outer side of the accommodating groove. During assembly, the lock cover is connected to the outer sleeve by embedding the embedded block into the embedded groove.
10. The lock core with an anti-drilling structure according to claim 9, characterized in that: It also includes an elastic opening ring, the outer side of the insert is provided with a second arc groove corresponding to the elastic opening ring, and the outer sleeve is provided with a first arc groove corresponding to the elastic opening ring. During assembly, the first arc groove is connected to the second arc groove, and the elastic opening ring is embedded in the first arc groove and the second arc groove.