A USB lock
By tightly fitting the plug assembly with the USB interface and using the push-twist assembly and movable connecting block to achieve reliable interlocking, the problems of looseness and poor positioning of existing USB locks are solved, providing a USB lock that is compact, easy to operate, and has a long lifespan, and is suitable for complex environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHUHAI JULI SECURITY EQUIP CO LTD
- Filing Date
- 2026-04-27
- Publication Date
- 2026-06-02
AI Technical Summary
Existing USB locks are prone to loosening after prolonged use, have poor positioning performance, short lifespan, and large structural footprint, making them unsuitable for complex usage environments.
The plug assembly works in conjunction with the USB interface. By pushing the movable connecting block with the push-twist component, the movable pad lifts the locking part. The protruding hook fits tightly with the USB interface to achieve reliable interlocking and unlocking, preventing unauthorized devices from being inserted, preventing dust and dirt, and extending the life of the equipment.
It features a compact structure, convenient operation, long service life, good positioning effect, prevention of data leakage and equipment contamination, and adaptability to various usage environments.
Smart Images
Figure CN122136672A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of interface locks, and particularly to a USB lock. Background Technology
[0002] USB locks primarily refer to three types of products used to ensure computer security: First, hardware locks that physically block the USB port to prevent unauthorized devices from being inserted; second, computer locking software that uses the USB device as a key to lock the screen after insertion and removal; and third, software dongles used to verify software licenses. Users can choose the appropriate type based on their specific needs for data leakage prevention, convenient screen locking, or software copyright protection. Hardware locks, by physically blocking or locking the USB port, achieve the following functions: preventing data leakage by preventing others from inserting USB flash drives, external hard drives, and other devices, thus preventing unauthorized copying or theft of files; preventing malicious device access by avoiding the implantation of malicious hardware into the system through the USB port; and preventing dust and dirt by sealing the USB port to prevent dust and liquids from entering the device, further extending the device's lifespan. For example, Chinese patent CN223566151U discloses a USB interface locking structure. A motor drives a rotating end to rotate via a rotating component, causing the locking component to switch between a locked and unlocked position. The rotating end has an abutment boss, and the rotating component has a locking abutment top. When the locking abutment top rotates to the locked position, it pushes against the abutment boss, causing the locking part to rotate. When the locking abutment top rotates to the unlocked position, it releases its push against the abutment boss. However, under prolonged rotational wear, the rotating component is prone to loosening and displacement, resulting in the locking part not being able to tightly position itself with the USB interface. Secondly, during the locking process, the rotation angle of the locking part is relatively large, which can easily lead to a weak locking force, poor positioning effect, and short service life, requiring periodic replacement of parts. Furthermore, its structure occupies a large area, limiting its application environment and making it unsuitable for complex usage scenarios. Therefore, it is necessary to provide a USB lock with a compact structure, convenient operation, long service life, and good positioning effect. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a USB lock that is compact in structure, easy to operate, has a long service life and good positioning effect.
[0004] The technical solution adopted in this invention is as follows: This invention includes a plug assembly that is plugged into a USB interface. The USB interface includes contact terminals. The plug assembly includes a housing. The top of the housing is provided with a clearance hole. The clearance hole is provided with several sets of locking parts. The locking parts are provided with protruding hooks. A movable connecting block is slidably disposed inside the housing. The top of the movable connecting block is provided with a movable pad. The movable pad cooperates with the protruding hooks. The movable connecting block is connected to a push-twist assembly. When the plug assembly is inserted into the USB interface, the movable connecting block is pushed by the push-twist assembly, and the movable pad slides forward. The movable pad lifts the locking parts, and the protruding hooks generate radial movement of vertical displacement, thereby realizing reliable interlocking and unlocking between the USB interface and the plug assembly. As can be seen from the above solution, the push-twist assembly is inserted into the interior of the housing. When the plug assembly is inserted into the USB interface, the push-twist assembly is pushed forward, causing the movable connecting block to slide forward and drive the movable pad to lift the locking part. The protruding hook is positioned and engaged with the USB interface. The rotation angle of the locking part is small, and the protruding hook is tightly engaged with the USB interface, thereby achieving the locking of the USB interface, ensuring the safety of electronic products, effectively blocking the USB interface, preventing unauthorized device insertion, preventing data leakage, preventing others from arbitrarily inserting USB flash drives, external hard drives, and other devices, preventing unauthorized copying or theft of files; preventing malicious hardware from being implanted into the system through the USB interface; and providing dust and dirt protection by sealing the USB interface to prevent dust and liquid from entering the device, further extending the device's lifespan.
[0005] In a preferred embodiment, the housing has a first mounting hole that is symmetrically arranged on both sides, the push-torque assembly includes a first push-torque, a second push-torque, and a transmission rod, the two ends of the transmission rod are respectively connected to the first push-torque and the second push-torque, the movable connecting block has a through hole that is symmetrically arranged on both sides, the transmission rod passes through the first mounting hole and the through hole, and the first push-torque and the second push-torque are respectively located on the left and right sides of the housing.
[0006] In a preferred embodiment, the first mounting hole and the push-torque assembly are both located on the rear side of the housing, and the first push-torque, the second push-torque, and the transmission rod are connected to form an I-shaped structure.
[0007] In a preferred embodiment, a positioning block is provided inside the housing. The top front end of the positioning block has a first protrusion, and the bottom rear end of the positioning block has a second protrusion. The first protrusion is positioned and engaged with the movable pad, and the second protrusion is positioned and engaged with the movable connecting block.
[0008] In a preferred embodiment, the positioning block has symmetrical circular holes, the housing has symmetrical second mounting holes, the positioning block is fixedly connected to the housing by a positioning pin, and the positioning pin passes through the second mounting hole and the circular holes.
[0009] In a preferred embodiment, the top of the housing is provided with two sets of locking parts arranged side by side. The locking parts are cantilever beam springs, and the protruding hooks are provided at the ends of the locking parts. The cantilever beam springs are located on the front side of the housing. The USB interface includes contact terminals, and the front side of the housing serves as a tongue. When the tongue is inserted into the USB interface, the movable connecting block is pushed by the push-twist assembly, and the movable pad slides forward. The movable pad lifts the locking parts, and the protruding hooks extend out of the clearance holes. The clearance holes on the side of the contact terminals are positioned and engaged with the protruding hooks.
[0010] In a preferred embodiment, the top and bottom of the housing are provided with the clearance holes and several sets of the locking parts, the top and bottom of the movable connecting block are provided with the movable pads, and the front and back of the plug assembly are positioned and engaged with the USB interface.
[0011] In a preferred embodiment, the top and bottom of the movable connecting block are provided with T-shaped grooves, the movable pad is a T-shaped structure, and the movable pad is disposed in the T-shaped groove.
[0012] In a preferred embodiment, the locking part is a spring-loaded structure, with both ends of the locking part fixedly connected to both ends of the clearance hole, the protruding hook being disposed in the middle of the locking part, and the locking part having a concave structure. When the plug assembly is inserted into the USB interface, the movable connecting block is pushed by the push-twist assembly, the movable pad slides forward, the movable pad lifts the locking part, and the protruding hook engages with the USB interface for positioning.
[0013] In a preferred embodiment, the protruding hook is a boss structure with a beveled side. When the movable pad pushes up the locking part, the protruding hook extends out of the clearance hole, and the contact terminal is engaged in the beveled structure, thus playing a secondary positioning role.
[0014] In a preferred embodiment, the rear end of the plug assembly is provided with a lock body assembly, the lock body assembly including a lock body housing, the interior of which is provided with a lock cylinder, a rotating groove, and a locking pin. The lock cylinder is rotatably disposed in the rotating groove, and a return spring is provided on the top of the locking pin. The return spring cooperates with the locking pin in a support manner, and the lock cylinder and the locking pin are in a transmission cooperation. Positioning holes are provided on the top of the housing, the top of the movable connecting block, the movable pad, the bottom of the movable connecting block, and the bottom of the housing. When the plug assembly... When the front end of the key is inserted into the USB interface, the push-twist assembly is pushed forward, and the positioning block and the movable connecting block are positioned and engaged. The positioning holes of the housing, the movable connecting block, and the movable pad are vertically connected. When the key turns the lock cylinder, the lock cylinder rotates along the rotating groove, causing the locking pin to move downward. The bottom of the locking pin is inserted into the positioning hole. The movable pad and the lock body assembly are associated through the locking pin. The opening and closing of the lock body assembly can control the axial movement of the movable pad. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the plug assembly; Figure 3 This is an exploded three-dimensional view of the plug assembly; Figure 4 This is a three-dimensional structural diagram of the plug assembly inserted into the USB interface; Figure 5 This is a first cross-sectional view of the present invention; Figure 6 This is a second cross-sectional view of the present invention; Figure 7 This is a three-dimensional structural diagram of the lock cylinder and the rotating groove; Figure 8 This is a three-dimensional structural diagram of the plug assembly when both ends of the locking mechanism are fixed structures. Detailed Implementation
[0016] like Figures 1 to 6As shown, in this embodiment, the present invention includes a plug assembly 1, which is plugged into a USB interface 9. The USB interface 9 includes contact terminals 21. The plug assembly 1 includes a housing 2. The top of the housing 2 is provided with a clearance hole 3. The clearance hole 3 is provided with a plurality of locking parts 4. The locking parts 4 are provided with protruding hooks 5. A movable connecting block 6 is slidably disposed inside the housing 2. The top of the movable connecting block 6 is provided with a movable pad 7. The movable pad 7 cooperates with the protruding hooks 5. The movable connecting block 6 is connected to a push-twist assembly 8. When the plug assembly 1 is inserted into the USB interface 9, the movable connecting block 6 is pushed by the push-twist assembly 8, and the movable pad 7 slides forward. The movable pad 7 lifts the locking parts 4, and the protruding hooks 5 generate radial movement of vertical displacement, thereby realizing reliable interlocking and unlocking between the USB interface 9 and the plug assembly 1. The locking part 4 is an elastic structure. The push-twist assembly 8 is used to push the movable connecting block 6. The movable connecting block 6 is used to drive the movable pad 7 to slide forward or backward. The movable pad 7 is located at the bottom of the locking part 4. The movable pad 7 is used to lift or pull away from the bottom of the locking part 4. The protruding hook 5 is positioned and engaged with the USB interface 9. The protruding hook 5 generates radial movement of vertical displacement to realize reliable interlocking and unlocking between the USB interface 9 and the plug assembly 1.
[0017] like Figures 2 to 3 As shown, in this embodiment, the housing 2 has symmetrical first mounting holes 10. The push-torque assembly 8 includes a first push-torque 11, a second push-torque 12, and a transmission rod 13. The two ends of the transmission rod 13 are connected to the first push-torque 11 and the second push-torque 12, respectively. The movable connecting block 6 has symmetrical through holes 14. The transmission rod 13 passes through the first mounting holes 10 and the through holes 14. The first push-torque 11 and the second push-torque 12 are located on the left and right sides of the housing 2, respectively. The outer sides of the first push-torque 11 and the second push-torque 12 have a striped structure, facilitating the forward or backward movement of the push-torque assembly 8.
[0018] like Figures 2 to 3 As shown, in this embodiment, the first mounting hole 10 and the push-torque assembly 8 are both located on the rear side of the housing 2, and the first push-torque 11, the second push-torque 12 and the transmission rod 13 are connected to form an I-shaped structure.
[0019] like Figure 3As shown, in this embodiment, a positioning block 15 is provided inside the housing 2. A first protrusion 16 is provided at the top front end of the positioning block 15, and a second protrusion 17 is provided at the bottom rear end of the positioning block 15. The first protrusion 16 is positioned and engaged with the movable pad 7, and the second protrusion 17 is positioned and engaged with the movable connecting block 6. The positioning block 15 is used to limit the sliding stroke of the movable pad 7 and the movable connecting block 6, which facilitates the precise locking of the plug assembly 1.
[0020] like Figures 2 to 3 As shown, in this embodiment, the positioning block 15 has symmetrical circular holes 18, and the housing 2 has symmetrical second mounting holes 19. The positioning block 15 is fixedly connected to the housing 2 by a positioning pin, and the positioning pin passes through the second mounting hole 19 and the circular hole 18.
[0021] like Figures 1 to 4 As shown, in this embodiment, the top of the housing 2 is provided with two sets of locking parts 4 arranged side by side. The locking part 4 is a cantilever beam spring piece. The protruding hook 5 is provided at the end of the locking part 4. The cantilever beam spring piece is located on the front side of the housing 2. The USB interface 9 includes a contact terminal 21. The front side of the housing 2 serves as a tongue. The movable pad 7 is an elastic or non-elastic structure. When the tongue is inserted into the USB interface 9, the movable connecting block 6 is pushed by the push-twist assembly 8, and the movable pad 7 slides forward. The movable pad 7 lifts the locking part 4, and the protruding hook 5 extends out of the clearance hole 3. The clearance hole on one side of the contact terminal 21 is positioned and engaged with the protruding hook 5.
[0022] like Figures 3 to 6 As shown, in this embodiment, the top and bottom of the housing 2 are provided with the clearance hole 3 and several sets of the locking parts 4, the top and bottom of the movable connecting block 6 are provided with the movable pad 7, and the front and back of the plug assembly 1 are positioned and cooperated with the USB interface 9.
[0023] like Figure 3 As shown, in this embodiment, the top and bottom of the movable connecting block 6 are provided with T-shaped grooves, the movable pad 7 has a T-shaped structure, and the movable pad 7 is disposed in the T-shaped groove.
[0024] like Figure 8As shown, in this embodiment, the locking part 4 is a spring-loaded structure, and the two ends of the locking part 4 are fixedly connected to the two ends of the clearance hole 3 respectively. The protruding hook 5 is disposed in the middle of the locking part 4. The locking part 4 is a concave structure. The movable pad 7 is an elastic structure or a non-elastic structure. When the plug assembly 1 is inserted into the USB interface 9, the movable connecting block 6 is pushed by the push-twist assembly 8, and the movable pad 7 slides forward. The movable pad 7 lifts up the locking part 4, and the protruding hook 5 is positioned and engaged with the USB interface 9.
[0025] like Figure 3 As shown, in this embodiment, the protruding hook 5 is a boss structure, and the side of the boss structure is a slope structure 23. When the movable pad 7 pushes up the locking part 4, the protruding hook 5 extends out of the avoidance hole 3, and the contact terminal 21 is locked in the slope structure 23, restricting the protruding hook 5 from moving forward, thereby playing a secondary positioning role.
[0026] like Figures 5 to 7 As shown, in this embodiment, a lock body assembly 24 is provided at the rear end of the plug assembly 1. The lock body assembly 24 includes a lock body shell 25. Inside the lock body shell 25, a lock cylinder 26, a rotating groove 27, and a locking pin 28 are provided. The lock cylinder 26 is rotatably disposed in the rotating groove 27. A return spring 29 is provided on the top of the locking pin 28. The return spring 29 and the locking pin 28 provide a support engagement. The lock cylinder 26 and the locking pin 28 are in a transmission engagement. Positioning holes 30 are provided on the top of the housing 2, the top of the movable connecting block 6, the movable pad 7, the bottom of the movable connecting block 6, and the bottom of the housing 2. When… When the front end of the plug assembly 1 is inserted into the USB interface 9, the push-twist assembly 8 is pushed forward, the positioning block 15 is positioned and engaged with the movable connecting block 6, the positioning hole of the housing 2, the positioning hole of the movable connecting block 6, and the positioning hole of the movable pad 7 are vertically connected, the key rotates the lock cylinder 26, the lock cylinder 26 rotates along the rotating groove 27, driving the locking pin 28 to move downward, the bottom of the locking pin 28 is inserted into the positioning hole 30, the movable pad 7 and the lock body assembly 24 are associated through the locking pin 28, the opening and closing of the lock body assembly 24 controls the axial movement of the movable pad 7.
[0027] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.
Claims
1. A USB lock, comprising a plug assembly (1) that is mated with a USB interface (9), the USB interface (9) including contact terminals (21), and the plug assembly (1) including a housing (2), characterized in that: The top of the housing (2) is provided with a clearance hole (3), the clearance hole (3) is provided with a number of locking parts (4), the locking parts (4) are provided with protruding hooks (5), the inside of the housing (2) is provided with a movable connecting block (6), the top of the movable connecting block (6) is provided with a movable pad (7), the movable pad (7) cooperates with the protruding hooks (5), the movable connecting block (6) is connected to a push-twist assembly (8), when the plug assembly (1) is inserted into the USB interface (9), the movable connecting block (6) is pushed by the push-twist assembly (8), the movable pad (7) slides forward, the movable pad (7) lifts the locking part (4), and the protruding hook (5) generates a radial movement of up and down displacement, thereby realizing the interlocking and unlocking of the USB interface (9) and the plug assembly (1).
2. The USB lock according to claim 1, characterized in that, The housing (2) has a first mounting hole (10) that is symmetrical on the left and right. The push-torque assembly (8) includes a first push-torque (11), a second push-torque (12) and a transmission rod (13). The two ends of the transmission rod (13) are respectively connected to the first push-torque (11) and the second push-torque (12). The movable connecting block (6) has a through hole (14) that is symmetrical on the left and right. The transmission rod (13) passes through the first mounting hole (10) and the through hole (14). The first push-torque (11) and the second push-torque (12) are located on the left and right sides of the housing (2).
3. The USB lock according to claim 2, characterized in that, The first mounting hole (10) and the push-torque assembly (8) are both located on the rear side of the housing (2). The first push-torque (11), the second push-torque (12) and the transmission rod (13) are connected to form an I-shaped structure.
4. The USB lock according to claim 1, characterized in that, The housing (2) is provided with a positioning block (15) inside. The top front end of the positioning block (15) is provided with a first protrusion (16) and the bottom rear end of the positioning block (15) is provided with a second protrusion (17). The first protrusion (16) is positioned and cooperates with the movable pad (7), and the second protrusion (17) is positioned and cooperates with the movable connecting block (6).
5. The USB lock according to claim 4, characterized in that, The positioning block (15) has a symmetrical circular hole (18), and the housing (2) has a symmetrical second mounting hole (19). The positioning block (15) is fixedly connected to the housing (2) by a positioning pin, and the positioning pin passes through the second mounting hole (19) and the circular hole (18).
6. The USB lock according to claim 1, characterized in that, The top of the housing (2) is provided with two sets of locking parts (4) arranged side by side. The locking part (4) is a cantilever beam spring. The protruding hook (5) is provided at the end of the locking part (4). The cantilever beam spring is located on the front side of the housing (2). The USB interface (9) includes a contact terminal (21). The front side of the housing (2) serves as a tongue. When the tongue is inserted into the USB interface (9), the movable connecting block (6) is pushed by the push-twist assembly (8), and the movable pad (7) slides forward. The movable pad (7) lifts up the locking part (4), and the protruding hook (5) extends out of the clearance hole (3). The clearance hole on one side of the contact terminal (21) is positioned and engaged with the protruding hook (5).
7. The USB lock according to claim 1, characterized in that, The housing (2) is provided with the clearance hole (3) and several sets of the locking parts (4) at the top and bottom. The movable connecting block (6) is provided with the movable pad (7) at the top and bottom. The front and back of the plug assembly (1) are positioned and cooperated with the USB interface (9).
8. The USB lock according to claim 1, characterized in that, The locking part (4) is a spring-loaded structure. Both ends of the locking part (4) are fixedly connected to both ends of the clearance hole (3). The protruding hook (5) is located in the middle of the locking part (4). The locking part (4) has a concave structure. When the plug assembly (1) is inserted into the USB interface (9), the movable connecting block (6) is pushed by the push-twist assembly (8), the movable pad (7) slides forward, the movable pad (7) lifts up the locking part (4), and the protruding hook (5) is positioned and engaged with the USB interface (9).
9. The USB lock according to claim 6, characterized in that, The protruding hook (5) is a boss structure, and the side of the boss structure is a slope structure (23). When the movable pad (7) pushes up the locking part (4), the protruding hook (5) extends out of the avoidance hole (3), and the contact terminal (21) is locked in the slope structure (23), which plays a secondary positioning role.
10. The USB lock according to claim 4, characterized in that, The rear end of the plug assembly (1) is provided with a lock body assembly (24), which includes a lock body shell (25). The lock body shell (25) is provided with a lock cylinder (26), a rotating groove (27), and a locking pin (28). The lock cylinder (26) is rotatably disposed in the rotating groove (27). A return spring (29) is provided on the top of the locking pin (28). The return spring (29) and the locking pin (28) are in a support cooperation. The lock cylinder (26) and the locking pin (28) are in a transmission cooperation. The top of the housing (2), the top of the movable connecting block (6), the movable pad (7), the bottom of the movable connecting block (6), and the bottom of the housing (2) are all provided with positioning holes (30). When the When the front end of the plug assembly (1) is inserted into the USB interface (9), the push-twist assembly (8) is pushed forward. The positioning block (15) and the movable connecting block (6) are positioned and engaged. The positioning holes of the housing (2), the movable connecting block (6), and the movable pad (7) are connected vertically. When the key rotates the lock cylinder (26), the lock cylinder (26) rotates along the rotating groove (27), causing the locking pin (28) to move downward. The bottom of the locking pin (28) is inserted into the positioning hole (30). The movable pad (7) and the lock body assembly (24) are associated through the locking pin (28). The opening and closing of the lock body assembly (24) controls the axial movement of the movable pad (7).