Anti-drill class c lock cylinder

Abstract

The utility model relates to the field of anti-drilling C level lock cylinder, including the lock head shell and the core, the accommodating cavity for connecting the core is seted up in the lock head shell, the core is installed in the lock head shell, the unlocking hole for entering the key is seted up in the core, the end of lock head shell is seted up the recessed connecting part, the end of core forms the clamping part with the abutting of connecting part, the one end of lock head shell is sleeved with the shell cover, the sleeve joint groove of with lock head shell is formed on the shell cover and is inserted with the matched sleeve joint groove, and the through -hole that communicates with the accommodating cavity is seted up on the shell cover, the rotating gap is formed between sleeve joint groove and connecting part, and the rotatable anti-drilling piece is connected in the rotating gap, the lock eye that communicates with unlocking hole and through -hole is seted up on the anti-drilling piece, the utility model discloses a layer of protection structure to unlocking hole through anti-drilling piece, prevents the drill to enter unlocking hole easily, greatly improves the anti-drilling performance of lock cylinder, strengthens the security and reliability of lock use.

Description

Technical Field

[0001] This utility model relates to the field of lock cylinders, specifically to a drill-proof Class C lock cylinder. Background Technology

[0002] As the core component of locks, the lock cylinder is widely used in various door locks, cabinet locks, vehicle locks, and other security devices, serving as a crucial barrier to protect personal property and privacy. With technological advancements and increasing societal security demands, lock cylinder technology has continuously evolved, transforming from simple mechanical structures into complex systems integrating mechanics, electronics, materials science, and other disciplines. Among these, drill-resistant lock cylinders are particularly favored in the market due to their effective resistance to forced entry methods (such as electric drill attacks), and possess broad application prospects.

[0003] The basic function of a lock cylinder is to open and close the lock by inserting and rotating a key, which drives the internal mechanism of the lock body. Its basic structure typically includes a lock case, a lock cylinder body, a rotating plate, a keyhole, and related transmission components. Under normal operating conditions, when the correct key is inserted into the keyhole and rotated, the rotating plate moves to a specific position under the push of the key teeth, allowing the lock cylinder body to rotate, which in turn drives other components of the lock body to complete the unlocking action.

[0004] However, despite significant improvements in anti-theft performance, existing Class C lock cylinders still suffer from noticeable deficiencies in drill resistance. The lock cylinder contains critical components such as rotating plates and springs, and the keyhole lacks effective drill protection. When the front of the lock cylinder is subjected to high-intensity physical attacks such as electric drills, the drill bit can easily penetrate the existing lock shell structure and enter the cylinder, causing damage to internal components and leading to lock failure. This, in turn, allows for unauthorized opening, further compromising security. Therefore, improving the drill resistance of Class C lock cylinders has become a pressing technical challenge for the lock industry. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned defects and provide a C-level anti-drill lock cylinder, so as to solve the technical problem that the existing lock cylinders in the above-mentioned background art have poor anti-drilling effect, which means that when the front of the lock cylinder is subjected to high-intensity physical attacks such as electric drills, the drill bit can easily penetrate the existing lock shell structure and enter the lock cylinder to cause damage, thereby affecting the safety and reliability of the lock cylinder.

[0006] The objective of this utility model is achieved through the following means:

[0007] The C-grade anti-drilling lock cylinder includes a lock shell and a cylinder body. The lock shell has a cavity for connecting the cylinder body. The cylinder body is fitted into the lock shell, with one end protruding through the cavity. The cylinder body has an unlocking hole for inserting a key. One end of the cylinder body is connected to a rotating plate. The end of the lock shell has a recessed connecting portion. One end of the cylinder body passes into the cavity and has a retaining portion that abuts against the connecting portion. A sleeve is fitted onto one end of the lock shell. The sleeve has a fitting groove for insertion and assembly with the lock shell and a through hole communicating with the cavity. A rotational gap is formed between the fitting groove and the connecting portion. A rotatable anti-drilling block is connected within the rotational gap. The anti-drilling block has a keyhole communicating with the unlocking hole and the through hole. One end of the anti-drilling block protrudes through the through hole and out of the sleeve.

[0008] Optionally, when the keyhole of the anti-drilling block is damaged by the external force of the drill bit, and no pressure is applied to the anti-drilling block, the rotation of the drill bit can drive the anti-drilling plate to rotate synchronously along the rotation gap, thereby playing an anti-drilling role.

[0009] Furthermore, as described above, the anti-drilling block is made of metal.

[0010] Metal materials have high hardness and strength. When a drill bit attempts to damage the keyhole of the anti-drill block, the metal anti-drill block can better resist the drill bit's penetration. Compared with other materials, it can effectively enhance the anti-drill capability, prevent the drill bit from easily penetrating the lock shell structure and entering the lock cylinder to cause damage, and improve the safety and reliability of the lock cylinder.

[0011] Further as described above, the anti-drilling block includes a support portion and a protrusion portion. The support portion is built into the rotation gap, and the side of the support portion contacts the end face of the clamping portion. The protrusion portion is formed on the support portion and protrudes through the through hole to be exposed outside the housing. The keyhole penetrates the protrusion portion and the support portion and communicates with the unlocking hole.

[0012] The support is built into the rotation gap and contacts the end face of the clamping part, providing stable support for the anti-drill block. When subjected to external force from the drill bit, it can rotate synchronously along the radial direction of the rotation gap, thereby reducing the damage of the drill bit to the lock core.

[0013] The protrusion protrudes through the through hole and is exposed outside the housing, facilitating key insertion into the keyhole for unlocking. The keyhole passes through the protrusion and the support and connects to the unlocking hole, ensuring that the key can smoothly enter the unlocking hole of the lock cylinder for unlocking. This structural design allows the anti-drill block to effectively prevent drill bits from damaging the inside of the lock cylinder while ensuring normal unlocking function, thus improving the anti-drilling performance and security of the lock cylinder.

[0014] Further, in the above description, a first wear-resistant gasket is provided between the support portion and the clamping portion. The first wear-resistant gasket is disposed within the rotation gap, and a second wear-resistant gasket is sleeved on the convex portion such that the second wear-resistant gasket contacts the end face of the support portion and the inner wall of the socket groove.

[0015] Providing a first wear-resistant gasket between the support portion and the clamping portion, and sleeving a second wear-resistant gasket on the convex portion can reduce the friction and wear between the anti-drilling block and the clamping portion, the end face of the support portion, and the inner wall of the socket groove during rotation. This can not only extend the service life of the anti-drilling block, but also ensure that the anti-drilling block rotates smoothly within the rotation gap, ensuring that it can play a normal anti-drilling role when subjected to the external force of the drill bit, and improving the anti-drilling performance and reliability of the lock core.

[0016] Further, in the above description, the convex portion and the support portion are provided in a "convex" shape, and grooves are formed on the outer side surfaces of the convex portion and the support portion. The grooves are arranged along the outer side surfaces of the convex portion and the support portion.

[0017] Forming grooves on the outer side surfaces of the convex portion and the support portion can, on the one hand, reduce the weight of the anti-drilling block, and on the other hand, when subjected to the external force of the drill bit, the grooves can disperse part of the stress. At the same time, the grooves reduce the contact with the inner wall of the connecting portion, thereby improving the anti-drilling ability and service life of the anti-drilling block, and enhancing the anti-drilling performance and safety of the lock core.

[0018] Further, in the above description, one end of the core body passes through the receiving cavity and is exposed outside the lock head shell, and a threaded portion is provided at one end of the core body. The core body is connected with a nut through the threaded portion.

[0019] Further, in the above description, a plug-in portion for mating with the socket groove is formed on the lock head shell, so that the shell sleeve is inserted and mated with the plug-in portion through the socket groove.

[0020] The plug-in portion formed on the lock head shell is inserted and mated with the socket groove of the shell sleeve for embedded installation, ensuring that the connection between the shell sleeve and the lock head shell is tighter and more secure, and guaranteeing the overall structural strength of the lock head shell and the shell sleeve.

[0021] The beneficial effects of the present utility model are as follows: A receiving cavity is provided in the lock head shell for mating and installing the core body. The clamping portion is formed at the end of the core body and abuts against the connecting portion at the end of the lock head shell. One end of the lock head shell is inserted and connected with the shell cover, so that a rotating member is formed between the socket groove and the connecting portion. A rotatable anti-drilling block is connected within the rotation gap between the end of the lock head shell and the shell sleeve, and a keyhole communicating with the unlocking hole and the through hole is formed on the anti-drilling block. When the keyhole is drilled and damaged by a drill bit, the anti-drilling block can provide a layer of protection structure for the unlocking hole, preventing the drill bit from easily entering the unlocking hole, greatly improving the anti-drilling performance of the lock core, and enhancing the safety and reliability of the lock during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a perspective view of this embodiment;

[0023] Figure 2 This is a cross-sectional view of this embodiment;

[0024] Figure 3 This is an exploded view of the entire embodiment;

[0025] Figure 4 This is a partial exploded view of this embodiment;

[0026] The reference numerals in the figure are as follows: 1-lock housing, 2-core, 3-receiving cavity, 4-unlocking hole, 5-rotating plate, 6-connecting part, 7-shell sleeve, 8-sleeve groove, 9-through hole, 10-anti-drilling block, 101-support part, 102-protrusion, 103-keyhole, 104-groove, 11-first wear-resistant pad, 12-second wear-resistant pad, 13-threaded part, 14-nut, 15-plug-in part. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer, the following describes the solution in further detail with reference to the accompanying drawings and embodiments.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In this embodiment, refer to Figures 1-4The specific implementation of the drill-resistant Class C lock cylinder includes a lock housing 1 and a core 2. The lock housing 1 has a receiving cavity 3 for connecting the core 2. The core 2 is fitted into the lock housing 1, with one end of the core 2 passing through the receiving cavity 3 and protruding to the outside. The core 2 has an unlocking hole 4 for inserting a key. One end of the core 2 is connected to a rotating piece 5. The end of the lock housing 1 has a recessed connecting portion 6. One end of the core 2 passes into the receiving cavity 3, and the end of the core 2 forms a connecting portion... The connecting part 6 is a retaining part that abuts against the lock head housing 1. One end of the lock head housing 1 is fitted with a housing sleeve 7. The housing sleeve 7 has a fitting groove 8 that is fitted and matched with the lock head housing 1. The housing sleeve 7 also has a through hole 9 that communicates with the receiving cavity 3. A rotation gap is formed between the fitting groove 8 and the connecting part 6. A rotatable anti-drilling block 10 is connected in the rotation gap. The anti-drilling block 10 has a keyhole 103 that communicates with the unlocking hole 4 and the through hole 9. One end of the anti-drilling block 10 passes through the through hole 9 and protrudes outside the housing sleeve 7.

[0031] The anti-drilling block 10 is made of metal. Metal has high hardness and strength. When a drill bit attempts to damage the keyhole 103 of the anti-drilling block 10, the metal anti-drilling block 10 can better resist the drill bit's penetration. Compared with other materials, it can effectively enhance the anti-drilling capability, prevent the drill bit from easily penetrating the lock shell structure and entering the lock cylinder to cause damage, and improve the safety and reliability of the lock cylinder.

[0032] Optionally, in some embodiments, the anti-drill block 10 is made of tungsten carbide coating, high-carbon tool steel, or bearing steel, etc.

[0033] Specifically, in this embodiment, the anti-drilling block 10 is made of high carbon steel, which can reduce the efficiency of the drill bit in drilling damage, thereby meeting the requirements of the lock core anti-drilling level.

[0034] Specifically, in this embodiment, there is a gap between the outer side of the anti-drilling block 10 and the inner wall of the connecting part 6. When the keyhole 103 of the anti-drilling block 10 is damaged by the external force of the drill bit, and no pressure is applied to the anti-drilling block 10, the rotation of the drill bit can drive the anti-drilling plate to rotate synchronously along the inner wall of the connecting part 6, thereby playing an anti-drilling role. Since the material of the anti-drilling block 10 is relatively hard, it further reduces the phenomenon of damage.

[0035] The anti-drilling block 10 is cylindrical and includes a support portion 101 and a protrusion 102. The support portion 101 is built into the rotation gap, and the outer diameter of the support portion 101 is smaller than the inner diameter of the connecting portion 6. The side of the support portion 101 contacts the end face of the clamping portion. The protrusion 102 is formed on the support portion 101, and the outer diameter of the protrusion 102 is smaller than the outer diameter of the support portion 101. The end of the protrusion 102 away from the support portion 101 can pass through the through hole 9 and be exposed outside the housing 7. The keyhole 103 passes through the protrusion 102 and the support portion 101 and communicates with the unlocking hole 4.

[0036] The supporting part 101 is built into the rotation gap and contacts the end face of the clamping part, providing stable support for the anti-drilling block 10. When it is subjected to the external force of the drill bit, it can rotate synchronously along the radial direction of the rotation gap, thereby reducing the damage of the drill bit to the lock core.

[0037] The convex part 102 passes through the through hole 9 and is exposed outside the housing sleeve 7, facilitating the insertion of the key into the keyhole 103 for unlocking operation; the keyhole 103 penetrates through the convex part 102 and the supporting part 101 and is connected to the unlocking hole 4, ensuring that the key can smoothly enter the unlocking hole 4 of the core body 2 for unlocking. This structural design enables the anti-drilling block 10 to effectively prevent the drill bit from damaging the inside of the lock core while ensuring normal unlocking function, improving the anti-drilling performance and use safety of the lock core.

[0038] A first wear-resistant gasket 11 is arranged between the supporting part 101 and the clamping part. The first wear-resistant gasket 11 is arranged in the rotation gap. A second wear-resistant gasket 12 is sleeved on the convex part 102, making the second wear-resistant gasket 12 contact the end face of the supporting part 101 and the inner wall of the socket groove 8.

[0039] Arranging the first wear-resistant gasket 11 between the supporting part 101 and the clamping part and sleeving the second wear-resistant gasket 12 on the convex part 102 can reduce the friction and wear between the anti-drilling block 10 and the clamping part, the end face of the supporting part 101, and the inner wall of the socket groove 8 during rotation. This can not only extend the service life of the anti-drilling block 10 but also ensure the smooth rotation of the anti-drilling block 10 in the rotation gap, ensuring that it can play a normal anti-drilling role when subjected to the external force of the drill bit, and improving the anti-drilling performance and reliability of the lock core.

[0040] The first wear-resistant gasket 11 and the second wear-resistant gasket 12 are circular gasket settings.

[0041] The convex part 102 and the supporting part 101 are arranged in a "convex" shape. Grooves 104 are formed on the outer side surfaces of the convex part 102 and the supporting part 101, and the grooves 104 are arranged along the outer side surfaces of the convex part 102 and the supporting part 101.

[0042] The grooves 104 are formed on the outer side surfaces of the convex part 102 and the supporting part 101. On the one hand, it can reduce the weight of the anti-drilling block 10. On the other hand, when subjected to the external force of the drill bit, the grooves 104 can disperse part of the stress. At the same time, the setting of the grooves 104 reduces the contact with the inner wall of the connecting part 6, thereby improving the anti-drilling ability and service life of the anti-drilling block 10 and enhancing the anti-drilling performance and safety of the lock core.

[0043] One end of the core body 2 passes through the accommodation cavity 3 and is exposed outside the lock head shell 1, and a threaded part 13 is provided at one end of the core body 2. The core body 2 is connected with a nut 14 through the threaded part 13.

[0044] The lock housing 1 has a plug-in portion 15 for mating with the socket groove 8, allowing the housing 7 to be mated and inserted into the socket groove 8. The plug-in portion 15 on the lock housing 1 is mated and inserted into the socket groove 8 of the housing 7, ensuring a tighter and more secure connection between the housing 7 and the lock housing 1, thus guaranteeing the overall structural strength of the lock housing 1 and the housing 7.

[0045] The specific installation and usage in this embodiment are as follows:

[0046] The core 2 is inserted into the receiving cavity 3 of the lock housing 1, so that the retaining part of the core 2 is engaged with the connecting part 6. The end of the core 2 near the threaded part 13 is connected to the rotating piece 5, and is threadedly connected to the threaded part 13 through the nut 14. The first wear-resistant pad 11 is brought into contact with the end face of the retaining part, and the protrusion 102 is fitted onto the second wear-resistant pad 12. The support part 101 of the anti-drilling block 10 is paired with the connecting part 6, so that the support part 101 is in contact with the first wear-resistant pad 11. The housing 7 is inserted and assembled with the insertion part 15 of the lock housing 1 through the sleeve groove 8, and the through hole 9 on the housing 7 is connected to the lock. The keyhole 103 and the unlocking hole 4 are connected. At the same time, the inner wall of the cover is in contact with the second wear-resistant pad 12. When an external drill bit is used to drill and damage the keyhole 103, the anti-drilling block 10 can provide a protective structure for the unlocking hole 4, preventing the drill bit from easily entering the unlocking hole 4, which greatly improves the anti-drilling performance of the lock cylinder. At the same time, when the drill bit applies rotational force to the keyhole 103, a certain rotational gap is generated between the anti-drilling block 10 and the connecting part 6. At this time, the anti-drilling block 10 can rotate synchronously under the drive of the drill bit, thereby slowing down the drilling damage to the core 2 and enhancing the safety and reliability of the lock.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A C-grade anti-drill lock cylinder, comprising a lock housing and a cylinder body, wherein the lock housing has a receiving cavity for connecting the cylinder body, the cylinder body is fitted into the lock housing, and one end of the cylinder body passes through the receiving cavity and protrudes to the outside; the cylinder body has an unlocking hole for inserting a key; and one end of the cylinder body is connected to a rotating plate, characterized in that: A recessed connecting portion is provided at the end of the lock head housing. One end of the core body penetrates into the accommodating cavity, and a clamping portion for abutting against the connecting portion is formed at the end of the core body. A housing sleeve is sleeved on one end of the lock head housing. A socket groove for inserting and mating with the lock head housing is formed on the housing sleeve, and a through hole communicating with the accommodating cavity is provided on the housing sleeve. A rotation gap is formed between the socket groove and the connecting portion, and a rotatable anti-drilling block is connected in the rotation gap. A keyhole communicating with the unlocking hole and the through hole is provided on the anti-drilling block, and one end of the anti-drilling block passes through the through hole and is exposed outside the housing sleeve.

2. The drill-resistant Class C lock cylinder according to claim 1, characterized in that: The anti-drilling block is made of a metal material.

3. The drill-resistant Class C lock cylinder according to claim 1, characterized in that: The anti-drilling block includes a supporting portion and a protruding portion. The supporting portion is placed in the rotation gap, the side surface of the supporting portion contacts the end surface of the clamping portion, the protruding portion is formed on the supporting portion, the protruding portion passes through the through hole and is exposed outside the housing sleeve, and the keyhole penetrates through the protruding portion and the supporting portion and communicates with the unlocking hole.

4. The drill-resistant Class C lock cylinder according to claim 3, characterized in that: A first wear-resistant gasket is provided between the supporting portion and the clamping portion. The first wear-resistant gasket is arranged in the rotation gap. A second wear-resistant gasket is sleeved on the protruding portion, and the second wear-resistant gasket contacts the end surface of the supporting portion and the inner wall of the socket groove.

5. The drill-resistant Class C lock cylinder according to claim 3 or 4, characterized in that: The protruding portion and the supporting portion are arranged in a "convex" shape, and grooves are provided on the outer side surfaces of the protruding portion and the supporting portion. The grooves are arranged along the outer side surfaces of the protruding portion and the supporting portion.

6. The drill-resistant Class C lock cylinder according to any one of claims 1-5, characterized in that: One end of the core body passes through the accommodating cavity and is exposed outside the lock head housing, and a threaded portion is provided at one end of the core body. The core body is connected with a nut through the threaded portion.

7. The drill-resistant Class C lock cylinder according to any one of claims 1-5, characterized in that: An inserting portion for mating with the socket groove is formed on the lock head housing, and the housing sleeve is inserted and mated with the inserting portion through the socket groove.

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