Detachable anti-theft alarm device of two-wheeled vehicle

By designing an anti-theft alarm device that includes a base, top cover, and inner cover, and utilizing the cooperation of a magnetic slide and a limiting component, the alarm achieves double-layer protection and built-in power supply, solving the problems of easy disassembly and power cut-off in existing technologies, and improving the safety and reliability of the two-wheeled vehicle anti-theft alarm device.

CN121404411APending Publication Date: 2026-01-27ZHEJIANG RUXIN INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202511376768.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-25
Publication Date
2026-01-27

AI Technical Summary

Technical Problem

Existing anti-theft alarm devices for two-wheeled vehicles are easily damaged and rendered ineffective by professional methods. They also rely on batteries or vehicle power, making them vulnerable to being disassembled or having their power cut off by thieves, resulting in alarm failure and poor protection.

Method used

Design an anti-theft alarm device including a base, a top cover, and an inner cover. The inner cover is equipped with a magnetic slide and a limiting component. Through the cooperation of the magnetic slide and the limiting plate, active and passive limiting are formed to ensure that the top cover and the inner cover are integrated, increasing the difficulty of disassembly. The built-in power supply and double protection mechanism prevent thieves from disassembling or damaging the alarm.

Benefits of technology

It effectively prevents the alarm from being disassembled or damaged by thieves, ensuring that the alarm works normally and increasing security. The built-in power supply ensures that the alarm will not fail due to power failure. The inner cover design makes it difficult to remove directly, enhancing the anti-theft performance of the device.

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Abstract

The invention relates to the technical field of alarms, and discloses a two-wheeled vehicle detachable anti-theft alarm device which comprises a base and an upper cover which are installed together, an inner cover is further arranged between the base and the upper cover, and a magnet sliding disc, an active limiting assembly and a passive limiting assembly are arranged in the inner cover. Wherein the magnet sliding disc slides in the inner cover, the magnet sliding disc is matched with the active limiting assembly and controls the active limiting assembly to change the limiting target of the active limiting assembly, through the arrangement of the active limiting assembly, the upper cover and the inner cover can be integrally arranged together during normal use, the inner cover can be taken down together in the process of disassembling the upper cover, and the working efficiency is improved. After the vehicle is locked, the base and the inner cover are integrated, when the upper cover is detached, the inner cover cannot be taken down together with the upper cover, meanwhile, the base cannot be detached, at the moment, the alarm and internal elements of the alarm can be protected, and normal work of the alarm is guaranteed.
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Description

Technical Field

[0001] This invention relates to the field of alarm technology, specifically to a detachable anti-theft alarm device for two-wheeled vehicles. Background Technology

[0002] Two-wheeled vehicle anti-theft alarm devices are devices that use vibration sensors to detect abnormal vehicle conditions (such as being moved or impacted) and trigger high-decibel sound and light alarms to deter thieves. They are easily damaged and rendered ineffective by professional means (such as cutting the wires or removing them directly) and rely on their own battery or vehicle power (they will be paralyzed if the power is cut off).

[0003] Nowadays, most alarms are installed independently inside electric vehicles. However, some thieves can directly disconnect the alarm by unplugging or cutting the connection wires. They can also use force to destroy key components (buzzers), causing the alarm to fail. Moreover, since alarms are now directly bolted to the vehicle, thieves can easily remove them, resulting in poor protection for both the vehicle and the alarm. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, the present invention provides a detachable anti-theft alarm device for two-wheeled vehicles, which has the advantage of preventing thieves from disassembling and damaging the alarm.

[0005] To achieve the above objectives, the present invention provides the following technical solution: comprising two bases and a top cover installed together, wherein an inner cover is provided between the bases and the top cover; The inner cover is provided with a magnetic slide, an active limiting component and a passive limiting component. The magnetic slide slides inside the inner cover and cooperates with the active limiting component to control the active limiting component to change its limiting target. Sealing caps are also fixed on both sides of the inner cover. The active limiting component includes four magnetic limiting plates, which are divided into upper and lower groups. The two upper magnetic limiting plates cooperate with the upper cover, and the two lower magnetic limiting plates cooperate with the base. The passive limiting component includes an auxiliary limiting block, which cooperates with the base to limit movement and is located between two upper and lower magnetic limiting plates.

[0006] Preferably, the inner cover has a sliding cavity inside, the magnetic slide slides inside the sliding cavity, magnetic blocks are fixed on both sides of the magnetic slide, the magnetic blocks correspond to the magnetic limiting plate, and the magnetic slide is interference-fitted with the inner wall of the sliding cavity.

[0007] Preferably, electromagnets are fixed on both the upper and lower end faces of the magnetic slide, and the magnetism generated by the electromagnets is the same on both sides of the magnetic slide. The magnetic poles of the magnetic block and the magnetic limiting plate are also the same.

[0008] Preferably, the magnetic limiting plate slides within the inner cover, and the middle position of the magnetic limiting plate is raised, with a main limiting spring fixedly installed between the raised portion and the inner wall of the inner cover.

[0009] Preferably, the auxiliary limiting block slides within the inner cover, and the inner wall of the auxiliary limiting block is connected to the inner wall of the inner cover by an auxiliary limiting spring. The upper surface of the auxiliary limiting block on the side away from the inner cover is set as an inclined surface.

[0010] Preferably, the upper and lower end faces of the inner cover are also provided with an external interface and an internal interface, which are connected by wires. The internal interface is electrically connected to the electronic components inside the base, and the external interface is connected to the controller wires outside.

[0011] Preferably, connecting plates are fixed on both sides of the top cover, and connecting seats are fixed on both sides of the base. The connecting plates and connecting seats are installed together by a first fastening bolt.

[0012] Preferably, the inner end face of the top cover also has two symmetrical blocks and a top cover limiting groove. The blocks abut against the auxiliary limiting blocks, and the top cover limiting groove cooperates with the upper magnetic limiting plate. One side end face of the top cover has a through wire hole.

[0013] Preferably, the two end faces inside the base are provided with symmetrical auxiliary limiting grooves and base limiting grooves, wherein the auxiliary limiting grooves are through-holes and cooperate with the auxiliary limiting block, and the base limiting grooves cooperate with the base limiting grooves below. One end face of the connecting seat is provided with a first fastening hole and a sealing notch, and a second fastening hole is provided inside the sealing notch. The base is fixedly installed on the vehicle by a second fastening bolt, the second fastening bolt being located in the second fastening hole. The sealing cover matches the sealing notch, and the first fastening bolt is located in the first fastening hole.

[0014] Preferably, the base contains several electronic components, including a built-in power supply, a circuit board, control components, and a buzzer, wherein the power supply can provide power to the electronic components inside the base.

[0015] Compared with the prior art, the present invention provides a detachable anti-theft alarm device for two-wheeled vehicles, which has the following beneficial effects: 1. The two-wheeled vehicle features a detachable anti-theft alarm device. Through the setting of the active limit component, the upper cover and the inner cover can be integrated into one unit during normal use. During the removal of the upper cover, the inner cover can also be removed together. Then, the base can be disassembled and installed normally. After the vehicle is locked, the base and the inner cover become integrated. When removing the upper cover, the inner cover cannot be removed together, and the base cannot be disassembled either. This protects the alarm and its internal components, ensuring the normal operation of the alarm.

[0016] 2. The two-wheeled vehicle has a detachable anti-theft alarm device. The inner cover provides double protection for the electronic components inside the alarm, increasing its security. Even if the top cover is damaged, the alarm will not be significantly affected and can still be used normally.

[0017] 3. The two-wheeled vehicle has a detachable anti-theft alarm device. When the controller wire is pulled out, the alarm will not be directly powered off. It has an internal power supply to provide power. At the same time, the inner cover prevents thieves from removing the buzzer inside the alarm, so that the alarm can still work and effectively prevent thieves from continuing to commit crimes. Moreover, the outer surface of the inner cover is rounded, which makes it relatively smooth and not easy to be removed by hand. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the half-section structure of the present invention; Figure 3 This is a schematic diagram of the half-section structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the internal structure of the present invention; Figure 6 This is a schematic diagram of the base structure of the present invention; Figure 7 This is a schematic diagram of the upper cover structure of the present invention; Figure 8 This is a schematic diagram of the inner cover structure of the present invention; Figure 9 This is a schematic diagram of the magnetic slide structure of the present invention.

[0019] In the diagram: 10. Base; 101. Auxiliary limiting groove; 102. Base limiting groove; 11. First fastening bolt; 12. Second fastening bolt; 13. Connecting seat; 131. First fastening hole; 132. Sealing notch; 133. Second fastening hole; 20. Top cover; 201. Stop block; 202. Top cover limiting groove; 203. Wire hole; 21. Connecting plate; 30. Inner cover; 301. Sealing cover; 302. Outer interface; 303. Sliding cavity; 304. Inner interface; 31. Magnetic slide; 311. Magnetic block; 32. Magnetic limiting plate; 321. Main limiting spring; 33. Auxiliary limiting block and auxiliary limiting spring; 331. Auxiliary limiting spring; 34. Electromagnet. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1-9 As shown, the alarm includes two interconnected bases 10 and a top cover 20. The base 10 houses several electronic components, including a built-in power supply, circuit board, control components, a buzzer, and lights. Several through holes are located on the side of the base 10 for emitting sound or light to the outside. The power supply can power the electronic components within the base 10. Even when an external person unplugs the vehicle controller's main plug, disconnecting the alarm's main power, the built-in power supply can still power the buzzer and control components. In this case, a remote control is required to deactivate the alarm. Under normal conditions, inserting the vehicle's key will also deactivate the alarm. An inner cover 30 is located between the base 10 and the top cover 20. This inner cover 30 provides double protection for the internal electronic components, increasing the alarm's security. Even if the top cover 20 is damaged, the alarm will not be significantly affected and can still be used normally.

[0022] The inner cover 30 contains a magnetic slide 31, an active limiting component, and a passive limiting component. The magnetic slide 31 slides within the inner cover 30 and cooperates with the active limiting component to control the active limiting component to change its limiting target. Sealing covers 301 are also fixed to both sides of the inner cover 30. The active limiting component includes four magnetic limiting plates 32, which are divided into upper and lower groups. The two upper magnetic limiting plates 32 cooperate with the upper cover 20, and the two lower magnetic limiting plates 32 cooperate with the base 10. That is, the upper magnetic limiting plates 32 can enter the upper cover's limiting position. The upper cover 20 is contained within the groove 202, thus restricting the upper cover 20 and the inner cover 30 to form an integral unit. During the disassembly of the upper cover 20, the inner cover 30 is removed along with it. At this time, the electronic components inside the base 10 can be inspected or replaced. When the lower magnetic limiting plate 32 enters the base limiting groove 102, the upper magnetic limiting plate 32 exits from the upper cover limiting groove 202. At this time, the inner cover 30 and the base 10 form an integral unit and cannot be easily opened. This protects the electronic components inside the base 10 from damage and ensures that the buzzer can continue to work.

[0023] Furthermore, when the inner cover 30 is restricted to the base 10, the sealing cover 301 will block the disassembly port of the second fastening bolt 12, thereby preventing the base 10 from being removed from the vehicle and causing the vehicle to be without an alarm. Therefore, it can effectively prevent thieves from disassembling or damaging the alarm and stealing the vehicle. When the inner cover 30 is restricted to the upper cover 20, disassembling the upper cover 20 can simultaneously remove the inner cover 30. At this time, without the obstruction of the sealing cover 301, the second fastening bolt 12 can be removed, and the entire alarm can be disassembled. The entire alarm can be installed independently in any position on the vehicle. After installation, it can be disassembled normally. Only when the alarm is triggered and the inner cover 30 is restricted to the base 10 can the alarm not be easily disassembled.

[0024] The passive limiting component includes an auxiliary limiting block 33, which cooperates with the base 10 for limiting and is located between the upper and lower magnetic limiting plates 32. The auxiliary limiting block 33 slides inside the inner cover 30. The inner wall of the auxiliary limiting block 33 is connected to the inner wall of the inner cover 30 by an auxiliary limiting spring 331. The upper surface of the auxiliary limiting block 33 on the side away from the inner cover 30 is set with an incline. By setting the auxiliary limiting block 33, the cooperation between the inner cover 30 and the base 10 can be further enhanced, making the connection between the two tighter, thereby increasing the difficulty of removing the inner cover 30 from the base 10, further protecting the electronic components inside the base 10 from damage, and avoiding affecting the normal alarm of the alarm.

[0025] The inner cover 30 has a sliding cavity 303 inside, and the magnetic slide 31 slides inside the sliding cavity 303. Magnet blocks 311 are fixed on both sides of the magnetic slide 31, and the magnet blocks 311 correspond to the magnet limiting plate 32. There is an interference fit between the magnetic slide 31 and the inner wall of the sliding cavity 303, making it difficult for the magnetic slide 31 to slide easily inside the sliding cavity 303. That is, normal shaking or impact forces cannot cause the magnetic slide 31 to slide. Multiple layers of slightly raised rings can also be provided on the inner wall of the sliding cavity 303 to restrict the sliding of the magnetic slide 31. Electromagnets 34 are fixed on both the upper and lower end faces of the magnetic slide 31. The magnetism generated by the electromagnets 34 is the same on both sides of the magnetic slide 31. The magnetic poles of the corresponding faces of the magnet blocks 311 and the magnet limiting plate 32 are also the same. The magnet limiting plate 32 slides inside the inner cover 30. The center of the magnet limiting plate 32 is raised, and a main limiting spring 321 is fixedly installed between the raised part and the inner wall of the inner cover 30. The large magnetic force of the electromagnet 34 can push the magnet slide 31 to slide in the slide cavity 303. Each time it slides, it will only slide to the opposite side of the electromagnet 34. That is, when the upper electromagnet 34 is activated and the lower one is deactivated, the magnet slide 31 will slide to the lower side, and vice versa. When both sides are activated at the same time, the magnet slide 31 will slide to the middle. When the magnet slide 31 drives the magnet block 311 to slide to the top or bottom, the magnet block 311 will correspond to the magnet limiting plate 32 at the corresponding position. Then, the action of the same magnetic pole will drive the magnet limiting plate 32 to slide and compress the main limiting spring 321, so that the magnet limiting plate 32 enters the corresponding position.

[0026] The triggering condition for electromagnet 34 is as follows: when a thief steals the vehicle, i.e., when the alarm is activated, or when the vehicle is remotely locked, the upper electromagnet 34 will activate once. The repulsive magnet slide 31 will drive the magnet block 311 to move to the bottom. Then, the lower magnet limiting plate 32 will be repelled by the magnet block 311 and enter the base limiting groove 102, thereby locking the base 10 and the inner cover 30 together. This prevents the thief from removing the alarm. To unlock this lock, the lock can be unlocked during the process of unlocking the vehicle with a remote key or after the key is directly inserted into the vehicle. At this time, it can be disassembled and installed normally.

[0027] The inner cover 30 is provided with an external interface 302 and an internal interface 304 on the upper and lower end faces. The two are connected by wires. The internal interface 304 is electrically connected to the electronic components inside the base 10, and the external interface 302 is connected to the external controller wires. That is, the wires of the external vehicle controller (including the vehicle battery) are connected to the external interface 302 and are not directly connected to the electronic components inside the base 10. The entire inner cover 30 is made of good materials that are not easily damaged, such as steel and carbon fiber. Therefore, when a thief forcibly pulls out the controller wires, the internal electronic components of the alarm will not be damaged, which ensures the security of the alarm. After the controller wires are pulled out, the alarm will not be directly powered off. It has an internal power supply to provide power, and the alarm can still work, effectively preventing the thief from continuing to commit the crime. Moreover, the outer surface of the inner cover 30 is rounded, which makes it smooth and not easy to be directly removed by hand.

[0028] Connecting plates 21 are fixed on both sides of the top cover 20, and connecting seats 13 are fixed on both sides of the base 10. The connecting plates 21 and the connecting seats 13 are installed together by the first fastening bolts 11. The inner end face of the top cover 20 also has two symmetrical stops 201 and a top cover limiting groove 202. The stops 201 abut against the auxiliary limiting block 33, and the top cover limiting groove 202 cooperates with the upper magnetic limiting plate 32. One side end face of the top cover 20 has a through wire hole 203, which is used for the insertion of vehicle control wires. The stops 201 are protruding and can abut against the auxiliary limiting block 33, causing the auxiliary limiting block 33 to retract inward.

[0029] The base 10 has symmetrical auxiliary limiting grooves 101 and base limiting grooves 102 on both sides inside. The auxiliary limiting grooves 101 are through-hole and cooperate with the auxiliary limiting block 33. The base limiting grooves 102 cooperate with the base limiting grooves 102 below. The connecting seat 13 has a first fastening hole 131 and a sealing notch 132 on one side. The sealing notch 132 has a second fastening hole 133 inside. The base 10 is fixedly installed on the vehicle by a second fastening bolt 12. The second fastening bolt 12 is located in the second fastening hole 133. The sealing cover 301 matches the sealing notch 132. The first fastening bolt 11 is located in the first fastening hole 131. The thickness of the sealing notch 132 ensures that the sealing cover 301 is completely inside the sealing notch 132, reducing the risk of external personnel using tools to pry up the sealing cover 301.

[0030] Working principle: When the user locks the vehicle, the upper electromagnet 34 will be activated once, causing the repulsive magnet slide 31 to move the magnet block 311 to the bottom. Then, the lower magnet limiting plate 32 is repelled by the magnet block 311 and enters the base limiting groove 102, thereby locking the base 10 and the inner cover 30 together. When a thief steals the vehicle, the alarm will be activated to deter the thief from stealing. If the thief continues to steal and damages the alarm, the damage to the upper cover 20 will not affect the normal use of the alarm. Moreover, when the upper cover 20 is removed, the inner cover 30 is restricted on the base 10, and the sealing cover 301 prevents the thief from removing the second fastening bolt 12, thus preventing the entire base 10 from being disassembled. Therefore, the alarm is protected. Furthermore, since the alarm cannot be disassembled for a long time, the thief will give up the theft, preventing the theft and damage of the vehicle and the alarm.

[0031] After the user unlocks the vehicle, the electromagnet 34 below will be activated once, causing the repulsive magnet slide 31 to move the magnet block 311 to the top. Then, the upper magnet limiting plate 32 is repelled by the magnet block 311 and enters the upper cover limiting groove 202, thereby locking the upper cover 20 and the inner cover 30 together. When the alarm needs to be replaced or repaired, the upper cover 20 is first removed by removing the first fastening bolt 11. Since the upper cover 20 and the inner cover 30 are locked together, the inner cover 30 will be removed together. At this time, due to the abutment of the stop block 201, the auxiliary limiting block 33 is in a retracted state before the inner cover 30 is removed. During the process of the inner cover 30 moving upward to remove it, the auxiliary limiting block 33 will be abutted by the auxiliary limiting groove 101 and continue to retract inward, so that the upper cover 20 and the inner cover 30 can be safely removed to repair the internal parts of the alarm. At this time, since the sealing cover 301 no longer restricts the second fastening bolt 12, the base 10 can be completely removed by removing the second fastening bolt 12.

[0032] After the repair is completed, the base 10 is installed on the vehicle using the second fastening bolt 12. Then, manually retract the auxiliary limiting blocks 33 on both sides inward, or set the bottom of the auxiliary limiting blocks 33 with a slope. Then, the upper cover 20 and the inner cover 30 can be directly fastened onto the base 10. At this time, the upper cover 20 and the inner cover 30 can be initially installed by the restriction of the auxiliary limiting blocks 33, and they will not fall off easily, making it convenient to continue installing the first fastening bolt 11. There is no need to manually support the upper cover 20, making it more convenient for single-person operation.

[0033] In summary, this detachable anti-theft alarm device for two-wheeled vehicles, through the active limiting component, allows the upper cover 20 and inner cover 30 to form a single unit during normal use. During the removal of the upper cover 20, the inner cover 30 can also be removed simultaneously, allowing for normal disassembly and installation of the base 10. When the vehicle is locked, the base 10 and inner cover 30 become a single unit, preventing the removal of the inner cover 30 and the base 10 during the removal of the upper cover 20. This protects the alarm and its internal components, ensuring its normal operation. The inner cover 30 provides double-layer protection for the internal electronic components, increasing the alarm's security. Even if the upper cover 20 is damaged, the alarm will not be significantly affected and can continue to function normally. When the controller wire is unplugged, the alarm will not be powered off directly. It has an internal power supply to provide power. At the same time, the inner cover 30 prevents thieves from removing the buzzer inside the alarm, so that the alarm can still work and effectively prevent thieves from continuing to commit crimes. Moreover, the outer surface of the inner cover 30 is rounded, making it smooth and not easy to be removed by hand.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable anti-theft alarm device for a two-wheeled vehicle, comprising two bases (10) and a top cover (20) mounted together, characterized in that: An inner cover (30) is also provided between the base (10) and the top cover (20); The inner cover (30) is provided with a magnetic slide (31), an active limiting component and a passive limiting component. The magnetic slide (31) slides inside the inner cover (30). The magnetic slide (31) cooperates with the active limiting component to control the active limiting component to change its limiting target. Sealing caps (301) are also fixed on both sides of the inner cover (30). The active limiting component includes four magnetic limiting plates (32), which are divided into upper and lower groups. The two upper magnetic limiting plates (32) cooperate with the upper cover (20), and the two lower magnetic limiting plates (32) cooperate with the base (10). The passive limiting component includes an auxiliary limiting block (33), which cooperates with the base (10) for limiting and is located between the upper and lower magnetic limiting plates (32).

2. The detachable anti-theft alarm device for a two-wheeled vehicle according to claim 1, characterized in that: The inner cover (30) has a sliding cavity (303) inside. The magnetic slide (31) slides inside the sliding cavity (303). Magnet blocks (311) are fixed on both sides of the magnetic slide (31). The magnet blocks (311) correspond to the magnet limiting plate (32). The magnetic slide (31) and the inner wall of the sliding cavity (303) are interference-fitted.

3. The detachable anti-theft alarm device for a two-wheeled vehicle according to claim 2, characterized in that: Electromagnets (34) are fixed on both the upper and lower end faces of the magnetic slide (31). The magnetism generated by the electromagnets (34) is the same on both sides of the magnetic slide (31). The magnetic poles of the magnet block (311) and the corresponding magnetic poles of the magnet limiting plate (32) are also the same.

4. The detachable anti-theft alarm device for a two-wheeled vehicle according to claim 1, characterized in that: The magnet limiting plate (32) slides inside the inner cover (30). The middle position of the magnet limiting plate (32) is raised, and a main limiting spring (321) is fixedly installed between the raised part and the inner wall of the inner cover (30).

5. The detachable anti-theft alarm device for a two-wheeled vehicle according to claim 1, characterized in that: The auxiliary limiting block (33) slides inside the inner cover (30). The inner wall of the auxiliary limiting block (33) is connected to the inner wall of the inner cover (30) by an auxiliary limiting spring (331). The upper surface of the auxiliary limiting block (33) on the side away from the inner cover (30) is set as an inclined surface.

6. The detachable anti-theft alarm device for a two-wheeled vehicle according to claim 1, characterized in that: The inner cover (30) is also provided with an outer interface (302) and an inner interface (304) on the upper and lower end faces. The two are connected by wires. The inner interface (304) is electrically connected to the electronic components inside the base (10), and the outer interface (302) is connected to the controller wires outside.

7. A detachable anti-theft alarm device for a two-wheeled vehicle according to claim 1, characterized in that: Connecting plates (21) are fixed on both sides of the top cover (20), and connecting seats (13) are fixed on both sides of the base (10). The connecting plates (21) and connecting seats (13) are installed together by the first fastening bolt (11).

8. A detachable anti-theft alarm device for a two-wheeled vehicle according to claim 7, characterized in that: The inner end face of the upper cover (20) also has two symmetrical stops (201) and an upper cover limiting groove (202). The stops (201) abut against the auxiliary limiting block (33), and the upper cover limiting groove (202) cooperates with the upper magnet limiting plate (32). One side end face of the upper cover (20) has a through wire hole (203).

9. A detachable anti-theft alarm device for a two-wheeled vehicle according to claim 7, characterized in that: The base (10) has symmetrical auxiliary limiting grooves (101) and base limiting grooves (102) on both sides inside. The auxiliary limiting grooves (101) are through-holes and cooperate with the auxiliary limiting block (33). The base limiting grooves (102) cooperate with the base limiting grooves (102) below. The connecting seat (13) has a first fastening hole (131) and a sealing notch (132) on one side. The sealing notch (132) has a second fastening hole (133) inside. The base (10) is fixedly installed on the vehicle by a second fastening bolt (12). The second fastening bolt (12) is located in the second fastening hole (133). The sealing cover (301) matches the sealing notch (132). The first fastening bolt (11) is located in the first fastening hole (131).

10. A detachable anti-theft alarm device for a two-wheeled vehicle according to claim 1, characterized in that: The base (10) contains several electronic components, including a built-in power supply, a circuit board, control components, and a buzzer, wherein the power supply can provide power to the electronic components inside the base (10).