Electronic padlock
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- YU YANXUE
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-02
Smart Images
Figure CN2025116010_02072026_PF_FP_ABST
Abstract
Description
An electronic padlock Technical Field
[0001] This utility model relates to the field of smart locks, specifically an electronic padlock. Background Technology
[0002] Passive electronic padlocks, as a security device, are widely used in various situations, such as the security protection of items in warehouses, cabinets, and suitcases. Traditional mechanical lock cylinders and early electronic lock cylinders relied on physical keys or simple electronic components for unlocking. With the development of technology, smart locks and passive padlocks with electronic control systems have gradually become the mainstream in the market, and their security, convenience, and reliability have been significantly improved.
[0003] However, existing passive electronic padlocks still have some design shortcomings. Traditional products typically use limit mechanisms to restrict the motor's rotation range to ensure the locking mechanism can accurately switch from the locked to the unlocked state. This not only results in inconsistent unlocking strokes each time, but also, after long-term use, wear and tear on mechanical parts may cause the limit mechanism to fail, affecting the accuracy of locking and unlocking. Users may encounter situations where they cannot unlock or lock smoothly.
[0004] Due to the lack of precise position detection methods, existing designs often require the motor to rotate several times to ensure successful unlocking, and the motor typically does not automatically shut off after the unlocking action is completed. While this improves the unlocking success rate, it also increases unnecessary power consumption. With frequent use, battery life is significantly shortened, increasing maintenance costs and inconvenience for users.
[0005] When the motor must run until its physical limit is reached, and there is no power-off mechanism, prolonged excessive operation can easily damage the motor and locking mechanism, increasing the failure rate and potentially even causing the motor to burn out due to overheating. This not only increases maintenance costs but may also pose safety hazards to users. Because of the reliance on mechanical limit components, these components may wear out or fail after long-term use, affecting the stability and reliability of the entire system. Users will have to frequently replace or repair the locks, increasing operating costs.
[0006] Therefore, how to overcome the above-mentioned defects and provide an electronic padlock that can accurately control the unlocking stroke and promptly cut off the power to the motor without physical limits has become an important issue that needs to be addressed by those skilled in the art. Utility Model Content
[0007] This invention overcomes the shortcomings of the above-mentioned technologies and provides an electronic padlock.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] An electronic padlock includes a lock housing, within which a lock beam is installed, a locking mechanism connected to the lock beam for driving the lock beam to move relative to the lock housing to unlock, a motor for driving the locking mechanism, and a control circuit board. A sensing circuit board is also installed at the bottom of the lock housing, electrically connected to the control circuit board and the motor. A position detection switch is also installed within the lock housing. A drive component that follows the rotation of the motor is connected to the upper end of the motor. The drive component includes four pawls arranged circumferentially at equal intervals, with each pair of adjacent pawls extending to the axis of the drive component forming an angle of 90 degrees. In the locked state of the locking mechanism, one pawl abuts against the non-detection area to the left of the position detection switch. When the sensing circuit board senses an unlocking command, the motor rotates, causing the drive component to rotate. As the motor rotates, the locking mechanism is driven to operate through the pawl until the next pawl adjacent to the first pawl in the direction of rotation passes the position detection switch, completing the unlocking action. At this point, the position detection switch transmits a signal to the control circuit board to de-energize the motor.
[0010] Furthermore, the position detection switch is a tactile switch or a proximity switch.
[0011] Furthermore, a mounting base is also fixedly installed inside the lock housing, and the motor, control circuit board, and position detection switch are all connected and fixed to the mounting base. A waterproof gasket is used to seal the mounting base and the lock housing.
[0012] Furthermore, the motor includes a rotatable reducer, and the drive component is connected to the upper end of the reducer and can rotate with the reducer.
[0013] Furthermore, the inner wall of the lock beam is symmetrically provided with recesses that cooperate with the locking mechanism. The locking mechanism includes an actuating member that abuts against the driving member and can rotate with the driving member, a rotating column fixedly connected to the upper end of the actuating member and can rotate with the actuating member, and spheres symmetrically arranged on the left and right sides of the rotating column that can be partially accommodated in the recesses. The rotating column includes a protrusion for pushing the spheres into the recesses when it rotates. The protrusions are symmetrically arranged front and back. The rotating column also includes a notch for accommodating the spheres after they come out of the recesses.
[0014] Furthermore, the upper end of the rotating column is provided with a cross-shaped limiting protrusion, and a cross-shaped limiting groove is formed between the cross-shaped limiting protrusions. The cross-shaped limiting groove includes four slots that are equidistantly arranged. The angle formed by two adjacent slots extending to the axis of the rotating column is 90 degrees. A torsion spring is sleeved around the cross-shaped limiting protrusion. One end of the torsion spring is limited in one of the slots, and the other end is fixedly connected to the lock housing. The torsion spring is used to drive the rotating column to rotate and reset after the ball disengages from the recess and when the locking beam is pressed down again, thereby completing the locking action. The locking mechanism also includes a limiting mechanism provided at the lower end of the rotating column to limit the rotation angle of the rotating column.
[0015] Furthermore, the limiting mechanism includes a limiting piece fixedly disposed within the lock housing, the limiting piece having an irregular groove, the rotating column including a protrusion rotatably disposed in the irregular groove, and the irregular groove including two symmetrically disposed 90-degree fan-shaped grooves.
[0016] Furthermore, the lock housing has a cavity for accommodating and allowing the ball to move within it, and the outer wall of the cavity has a limiting surface for preventing the ball from completely exiting the cavity. The lock housing also has a first channel and a second channel for accommodating and allowing the lock beam to move within it.
[0017] Furthermore, a first drain hole communicating with the first channel is provided on the side wall of the lock housing, and a second drain hole communicating with the second channel is also provided on the side wall of the lock housing.
[0018] Furthermore, the lock housing includes a base plate, the base plate includes an annular connecting portion and a mounting groove formed in the annular connecting portion, a support column is provided in the middle of the mounting groove, a through hole for inserting the support column is provided on the sensing circuit board, the sensing circuit board is embedded in the mounting groove, a waterproof gasket is fitted on the outer wall of the annular connecting portion, and an annular groove for embedding the waterproof gasket is provided at the lower end of the lock housing.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] 1. This design utilizes a position detection switch that engages with the teeth of the drive mechanism. In the locked state, one tooth is positioned in the non-detection area to the left of the position detection switch. When the sensing circuit board receives an unlock command, the motor starts and drives the drive mechanism to rotate. Because the four teeth are equidistantly distributed and the angle between adjacent teeth is 90 degrees, each rotation precisely covers the angle required for unlocking, effectively ensuring the consistency and accuracy of each unlocking action and eliminating the uncertainties caused by mechanical wear or limit switch failure in existing technologies. Users can rely on the same unlocking experience every time, improving the reliability of this electronic padlock.
[0021] 2. When the next tooth adjacent to the current tooth passes the position detection switch along the rotation direction, the position detection switch immediately transmits a signal to the control circuit board, which quickly cuts off the power supply to the motor, avoiding excessive motor operation, preventing damage to the motor and locking mechanism due to excessive rotation, preventing the motor from overheating and being damaged due to prolonged operation, and protecting the safety of the system hardware.
[0022] 3. The electronic padlock structure in this case effectively reduces friction and wear between internal components, improving system durability and lowering maintenance costs and failure rates. Since the motor only needs to rotate a few degrees to complete a full unlocking action, the entire process is very rapid, allowing users to complete the operation in a short time. This fast response time enhances the user experience, especially in emergency situations, providing faster security.
[0023] 4. This design features four circumferentially spaced teeth, with each pair of adjacent teeth extending to the axis of the drive component at a 90-degree angle. Upon completion of the unlocking action, the locking mechanism automatically resets, and the motor stops at the position where the next tooth is ready. In other words, after the motor completes the unlocking action and is powered off, the next tooth continues to engage in the non-detection area to the left of the position detection switch. This facilitates the next unlocking operation and ensures stability. This design simplifies the continuous unlocking process, reduces user waiting time, and further enhances convenience and efficiency. Attached Figure Description
[0024] Figure 1 is an exploded view of the electronic padlock in this case.
[0025] Figure 2 is a structural diagram of the locking mechanism, motor, lock beam, drive unit and position detection switch in this case in their coordinated state.
[0026] Figure 3 is a structural schematic diagram of the limiting mechanism, rotating column, actuating component, and torsion spring in this case.
[0027] Figure 4 is a side view of the electronic padlock in this case.
[0028] Figure 5 is a cross-sectional view along direction AA in Figure 4 of this case.
[0029] Figure 6 is a 3D view of the electronic padlock in this case. Detailed Implementation
[0030] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art:
[0031] As shown in Figures 1 to 6, this invention provides an electronic padlock, including a lock housing 100. The lock housing 100 protects internal components and provides an installation platform, offering a robust and enclosed environment to protect internal components from external influences, thus enhancing the overall stability and security of the system. Specifically, the lock housing 100 is made of metal, preferably a copper or zinc alloy. Inside the lock housing 100 are a lock beam 1, a locking mechanism 2 connected to the lock beam 1 for driving the lock beam 1 relative to the lock housing to unlock, a motor 3 for driving the locking mechanism 2, and a control circuit board 4. The lock beam 1 is connected to the lock housing 100 via the locking mechanism 2, enabling relative movement to complete unlocking or locking actions. A sensor circuit board 5 is also installed at the bottom of the lock housing 100, electrically connected to the control circuit board 4 and the motor 3. According to the instructions issued by the sensor circuit board 5, the motor 3 rotates to drive the locking mechanism 2, achieving unlocking or locking. Specifically, the sensor circuit board 5 receives external unlocking commands and sends control signals to the motor 3; simultaneously, it monitors the state of the position detection switch 6 to control the motor 3 to cut off power. The sensing circuit board 5 enables intelligent control of the electronic padlock in this case, improving the user experience. In specific implementation, the sensing circuit board 5 supports mobile phone NFC near-field communication technology and provides power through the mobile phone NFC, eliminating the need for a built-in power supply. This increases the flexibility, convenience and lifespan of use, and eliminates the need for a battery compartment and related circuit design, making the padlock structure more compact and lightweight, improving the product's aesthetics and portability, and saving energy and being environmentally friendly. A position detection switch 6 is also installed inside the lock housing 100. A drive component 7 that rotates with the motor 3 is connected to the upper end of the motor 3. The drive component 7 includes four teeth 71 arranged equidistantly around the outer periphery of the drive component 7. The angle formed by the extension of each pair of adjacent teeth 71 to the axis of the drive component 7 is 90 degrees. In the locked state of the locking mechanism 2, one of the teeth 71 abuts against the non-detection area on the left side of the position detection switch 6. When the sensing circuit board 5 senses the unlocking command, the motor 3 rotates and drives the drive component 7 to rotate. As the motor 3 rotates, the locking mechanism 2 is driven to move through the teeth 71 until the next tooth 71 adjacent to the tooth 71 in the direction of rotation passes the position detection switch 6, and the unlocking action is completed. At this time, the position detection switch 6 transmits a signal to the control circuit board 4 to control the motor to cut off the power. This design utilizes a position detection switch 6 that works in conjunction with the lever 71 of the drive unit 7. When the motor drives the drive unit 7 to switch the locking mechanism 2 from the locked state to the unlocked state, the lever 71 triggers the position detection switch 6. The sensing circuit board 5 receives the signal and transmits it to the control circuit board 4, which then controls the motor 3 to power off. This structure and control method provide precise position feedback for the electronic padlock, preventing excessive operation of the motor 3, thus preventing damage to the motor 3 and locking mechanism 2 due to excessive rotation, and preventing overheating damage to the motor 3 due to prolonged operation, protecting the motor 3 and other critical components from damage.Compared to existing technologies that use limit mechanisms to lock the motor 3 and control the rotation range of the locking part, this design features a fixed unlocking stroke and a fixed rotation angle of 90 degrees. The timely power cut-off ensures precise locking and unlocking, prevents the motor 3 from continuing to rotate and triggering the position detection switch 6 after unlocking, and prevents damage to the locking mechanism 2 and motor 3 due to prolonged operation, thus avoiding burnout of motor 3. The 90-degree stroke facilitates unlocking, provides a fast response, and demonstrates a reasonable structural design.
[0032] It should be noted that in this design, four teeth are circumferentially spaced, and the angle formed by the extension of every two adjacent teeth to the axis of the drive component is 90 degrees. This determines that the unlocking rotation angle of the electronic padlock is 90 degrees. When each tooth 71 passes the position detection switch 6, the motor 3 is immediately de-energized, ensuring the consistency and accuracy of each unlocking stroke. This design simplifies the control logic and enhances the reliability and stability of the system.
[0033] Choosing a 90-degree unlocking angle has specific advantages and considerations compared to other rotation angles such as 45 degrees, 60 degrees, 120 degrees, or 180 degrees.
[0034] Compared to 45 degrees and 60 degrees, a 90-degree rotation angle provides sufficient range of motion to ensure the locking mechanism can fully unlock, while maintaining a relatively compact design. For electronic padlocks, a 90-degree rotation is neither too lengthy nor too small, thus avoiding mechanical complexity.
[0035] In contrast, while unlocking angles of 45 or 60 degrees can reduce rotation time, they may not be sufficient to guarantee full release of the locking mechanism, especially in applications requiring a large operating space. Furthermore, smaller angles may increase the torque requirements of the motor, thus increasing design complexity. Smaller angles also demand higher manufacturing and assembly precision to ensure accurate positioning with each rotation. This not only increases production and maintenance costs but may also affect long-term reliability.
[0036] Compared to 120 degrees and 180 degrees, a larger rotation angle means greater energy consumption and wear on the internal mechanical transmission, especially under frequent use. Furthermore, a larger rotation angle may cause the motor 3 and locking mechanism 2 to experience greater stress, increasing the risk of wear and failure. The longer rotation time may also increase user waiting time, reducing user experience and potentially hindering rapid response in emergency situations.
[0037] In practice, the position detection switch 6 can be a tactile switch or a proximity switch, and users can choose to install it according to their needs.
[0038] As shown in Figures 1, 4, and 5, a fixing base 200 is also fixedly installed inside the lock housing 100. The motor 3, control circuit board 4, and position detection switch 6 are all connected and fixed to the fixing base 200. The fixing base 200 provides a stable installation limiting platform, ensuring that the above-mentioned components will not shift or loosen during operation, enhancing the overall stability and reliability, and reducing the risk of failure due to vibration or impact. In specific implementation, the fixing base 200 is provided with a limiting structure for limiting and fixing the motor 3, control circuit board 4, and position detection switch 6, and is connected and fixed by screws or other means to further improve the stability of each component. A waterproof gasket is sealed between the fixing base 200 and the lock housing 100. The waterproof gasket can effectively prevent moisture intrusion, protect the internal circuits and mechanical components from corrosion and short circuit risks, and improve the service life of the electronic padlock in this case.
[0039] Furthermore, referring to Figures 1 and 2, the motor 3 in this invention includes a rotatable reducer 31, and the drive component 7 is connected to the upper end of the reducer 31 and can rotate with the reducer 31. By setting the reducer 31, the rotational speed of the output shaft of the motor 3 can be reduced, while the torque can be increased. This converts the high-speed rotation of the motor 3 into a low-speed, high-torque motion suitable for driving the locking mechanism 2, increasing the torque required to drive the locking mechanism 2, ensuring sufficient force to complete the unlocking and locking actions, reducing the operating speed of the motor 3, reducing wear on mechanical parts, and extending the service life of the motor. At the same time, the low-speed rotation makes the system more sensitive to the position detection switch 6, improving the accuracy of unlocking and locking.
[0040] As shown in Figures 1, 2, 4, and 5, specifically, recesses 11 that cooperate with the locking mechanism 2 are symmetrically arranged on the inner wall of the locking beam 1. In specific implementations, the locking beam 1 has a common U-shaped structure, and the recesses 11 are symmetrically arranged on the inner walls at both ends of the U-shaped locking beam. The locking mechanism 2 includes an actuating member 21 that abuts against the driving member 7 and can rotate with the driving member 7, a rotating column 22 fixedly connected to the upper end of the actuating member 21 and can rotate with the actuating member 21, and spheres 23 symmetrically arranged on the left and right sides of the rotating column 22 that can be partially accommodated in the recesses 11. The actuating member 21 ensures the synchronous movement of the locking mechanism 2 and the driving member 7, improving the coordination of the system. In specific implementations, the shapes of the recesses 11 and the spheres 23 are matched. The rotating post 22 includes a protrusion 221 for pushing the ball 23 into the recess 11 when it rotates. The protrusions 221 are symmetrically arranged front and rear. The rotating post 22 also includes a notch 222 for receiving the ball 23 after it disengages from the recess 11. The design of the protrusions 221 and the notch 222 ensures the accurate movement of the ball 23, realizes reliable locking and unlocking actions, reduces additional mechanical parts, and lowers design complexity and failure rate. The cooperation between the recess 11 and the ball 23 ensures the stability of the lock beam 1 in the locked state and prevents accidental unlocking. When the electronic padlock is in the locked state, the protrusion 221 of the rotating column 22 presses against the two balls 23 and makes the two balls 23 respectively accommodate in the corresponding recesses 11, thereby locking the lock beam 1; when the motor 3 rotates, the tooth 71 of the drive member 7 drives the actuating member 21 to rotate, thereby driving the rotating column 22 to rotate until the balls 23 disengage from the recesses 11 and respectively engage with the notches 222 of the rotating column 22, the lock beam 1 pops up, and the unlocking is completed.
[0041] Further, as shown in Figures 1-5, a cross-shaped limiting protrusion 223 is provided at the upper end of the rotating column 22, and a cross-shaped limiting groove 224 is formed between the cross-shaped limiting protrusions 223. The cross-shaped limiting groove 224 includes four slots 2241 arranged at equal intervals. The angle formed by two adjacent slots 2241 extending to the axis of the rotating column 22 is 90 degrees. A torsion spring 8 is sleeved around the cross-shaped limiting protrusion 223. One end of the torsion spring 8 is limited in one of the slots 2241, and the other end is fixedly connected to the lock housing 100. The torsion spring 8 is used to drive the rotating column 22 to rotate and reset after the ball 23 is disengaged from the recess 11 and when the lock beam 1 is pressed down again, thereby completing the locking action. In other words, after the user unlocks the electronic padlock, if the user wants to relock it, they only need to press down the lock beam 1 again. At this time, the locking mechanism 2 will automatically reset due to the torque of the torsion spring 8. That is, the rotating column 22 will reset and rotate under the torque of the torsion spring 8. The protrusion 221 of the rotating column 22 presses against the two balls 23 and causes the two balls 23 to move outward. As the lock beam 1 continues to be pressed down, the two balls 23 are respectively accommodated in the corresponding recesses 11, thereby locking the lock beam 1 again. At this time, the electronic padlock reaches the locked state. The function of the cross limiting groove 224 is to facilitate the installation of the torsion spring 8 and provide a stable preload for the torsion spring 8. That is to say, because different torsion springs 8 produced cannot guarantee that the initial preload is consistent, this may affect the rotation angle of the rotating column 22, thus affecting unlocking and, in the long run, also affecting unlocking accuracy. However, by fitting one end of the torsion spring 8 into one of the slots 2241, it can be effectively ensured that the preload of all torsion springs 8 of the same model is consistent. Even if they are inconsistent, they can be adjusted adaptively according to the different slots 2241 they are installed in. This structure of the cross-shaped limiting protrusion 223 and the cross-shaped limiting slot 224 ensures that the rotational accuracy of the rotating column 22 is not affected by the difference in the preload of the torsion spring 8, effectively ensuring the consistency and stability of the system. It avoids the tedious debugging and installation process during the installation of the torsion spring 8, allowing the torsion spring 8 to maintain high-precision operation over a long period. The locking mechanism 2 also includes a limiting mechanism 24 located at the lower end of the rotating column 22 to limit the rotation angle of the rotating column 22. By setting the limiting mechanism, mechanical wear caused by excessive rotation of the rotating column 22 is avoided, extending the service life of the system. It ensures that the movement range of the rotating column 22 is within a controllable range, guaranteeing an unlocking angle of 90 degrees, thus improving the stability and reliability of the system.
[0042] Referring again to Figures 1-5, the limiting mechanism 24 includes a limiting plate 241 fixedly disposed within the lock housing 100. The limiting plate 241 has a shaped groove 2411. The rotating column 22 includes a protrusion 225 rotatably disposed within the shaped groove 2411. The shaped groove 2411 includes two symmetrically arranged 90-degree fan-shaped grooves 24111. Through the cooperation of the above limiting structure, the torque of the torsion spring 8 is effectively prevented from driving the rotating column 22 to rotate indefinitely, always providing a preload force to the torsion spring 8 to facilitate the automatic reset of the rotating column 22, and always maintaining it within a 90-degree range. This effectively protects the corresponding mechanical components, avoiding wear on the corresponding components of the locking mechanism 2 and damage to the motor 3 due to excessive rotation of the rotating column 22, thus extending the service life of the system.
[0043] Further, as shown in Figures 1 and 4-6, a receiving cavity 101 is provided within the lock housing 100 to accommodate and allow the ball 23 to move. A limiting surface is provided on the outer wall of the receiving cavity 101 to prevent the ball 23 from completely exiting the receiving cavity 101. In specific implementations, the receiving cavities 101 are respectively opened corresponding to the two sides of the ball 23. The receiving cavity 101 provides a stable moving space for the ball 23, ensuring smooth movement of the ball 23 during locking and unlocking processes, effectively preventing interference or wear between the ball 23 and other components. The limiting surface ensures that the ball 23 will not exit the receiving cavity 101, guaranteeing reliability. The lock housing 100 also has a first channel 102 and a second channel 103 for accommodating and allowing the lock beam 1 to move.
[0044] As shown in Figures 1 and 4-6, a first drainage hole 104 communicating with the first channel 102 is provided on the side wall of the lock housing 100, and a second drainage hole 105 communicating with the second channel 103 is also provided on the side wall of the lock housing 100. Since electronic padlocks are generally used outdoors, they need to have good waterproof performance. In the above embodiment, a waterproof gasket is sealed between the fixing base 200 and the lock housing 100. This invention further improves the waterproof performance of the electronic padlock by providing the first drainage hole 104 and the second drainage hole 105. Even in accidental situations, if liquid flows in from the first channel 102 or the second channel 103, it can be discharged outside the lock housing through the first drainage hole 104 and the second drainage hole 105 respectively, preventing liquid accumulation inside. This achieves a good waterproof effect, effectively protecting the internal mechanical parts and electronic components from the influence of a humid environment, reducing the risk of short circuits or corrosion caused by liquid intrusion, and avoiding situations where the lock cannot be opened. This improves the stability and security of the electronic padlock and extends its service life.
[0045] As shown in Figures 1, 4, and 5, the lock housing 100 includes a base plate 106, which includes an annular connecting portion 1061 and a mounting groove 1062 formed within the annular connecting portion 1061. A support column 1063 is provided in the middle of the mounting groove 1062. A through hole 51 for inserting the support column 1063 is provided on the sensing circuit board 5, which is embedded in the mounting groove 1062. Through the structural cooperation between the support column 1063 and the mounting groove 1062, the sensing circuit board 5 can be accurately positioned and stably installed, reducing the impact on the sensing unlocking performance caused by the loosening or displacement of the sensing circuit board 5 due to vibration or impact. A waterproof gasket 9 is fitted on the outer wall of the annular connecting portion 1061, and an annular groove 107 for the waterproof gasket 9 to be embedded is provided at the lower end of the lock housing 100. The design of the waterproof gasket 9 and the annular groove 107 further improves the waterproof performance of the electronic padlock in this case. Under this premise, the base plate 106 and the lock housing 100 are detachable. In this preferred embodiment, after the sensor circuit board 5 is installed, the base plate 106 and the lock shell 100 can be in a non-removable state with glue sealing. This sealing method has good waterproof effect and good connection stability.
[0046] As stated above, this case protects an electronic padlock, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.
Claims
1. An electronic padlock, comprising a lock housing (100), wherein a lock beam (1), a locking mechanism (2) connected to the lock beam (1) for driving the lock beam (1) to move relative to the lock housing to unlock, a motor (3) for driving the locking mechanism (2) to move, and a control circuit board (4) are installed inside the lock housing (100), and a sensing circuit board (5) is also installed at the bottom of the lock housing (100), the sensing circuit board (5) being electrically connected to the control circuit board (4) and the motor (3), characterized in that: The lock housing (100) is also equipped with a position detection switch (6). The upper end of the motor (3) is connected to a drive unit (7) that rotates with the motor (3). The drive unit (7) includes a tooth (71) disposed on the outer periphery of the drive unit (7). The tooth (71) is equidistantly arranged in four directions, and the angle formed by the extension of each two adjacent teeth (71) to the axis of the drive unit (7) is 90 degrees. In the locked state of the locking mechanism (2), one of the teeth (71) abuts against the non-detection area on the left side of the position detection switch (6). When the sensing circuit board (5) senses the unlocking command, the motor (3) rotates and drives the drive unit (7) to rotate. As the motor (3) rotates, the locking mechanism (2) is driven to move through the tooth (71) until the next tooth (71) adjacent to the tooth (71) along the rotation direction passes the position detection switch (6) and the unlocking action is completed. At this time, the position detection switch (6) transmits a signal to the control circuit board (4) to control the motor (3) to cut off the power.
2. The electronic padlock according to claim 1, characterized in that: The position detection switch (6) is a tactile switch or a proximity switch.
3. An electronic padlock according to claim 1, characterized in that: A fixing seat (200) is also fixedly installed inside the lock housing (100). The motor (3), control circuit board (4), and position detection switch (6) are all connected and fixed on the fixing seat (200). A waterproof gasket is sealed between the fixing seat (200) and the lock housing (100).
4. An electronic padlock according to claim 1, wherein: The motor (3) includes a rotatable reducer (31), and the drive (7) is connected to the upper end of the reducer (31) and can rotate with the reducer (31).
5. An electronic padlock according to any one of claims 1-4, characterized in that: The inner wall of the locking beam (1) is symmetrically provided with recesses (11) that cooperate with the locking mechanism (2). The locking mechanism (2) includes a toggle (21) that abuts against the drive member (7) and can rotate with the drive member (7), a rotating column (22) that is fixedly connected to the upper end of the toggle (21) and can rotate with the toggle (21), and spheres (23) that are symmetrically arranged on the left and right sides of the rotating column (22) and can be partially accommodated in the recesses (11). The rotating column (22) includes a protrusion (221) that pushes the sphere (23) into the recesses (11) when it rotates. The protrusion (221) is symmetrically arranged front and back. The rotating column (22) also includes a notch (222) that accommodates the sphere after the sphere (23) comes out of the recesses (11).
6. An electronic padlock according to claim 5, wherein: The upper end of the rotating column (22) is provided with a cross-shaped limiting protrusion (223), and a cross-shaped limiting groove (224) is formed between the cross-shaped limiting protrusions (223). The cross-shaped limiting groove (224) includes four slots (2241) arranged at equal intervals. The angle formed by two adjacent slots (2241) extending to the axis of the rotating column (22) is 90 degrees. A torsion spring (8) is sleeved around the cross-shaped limiting protrusion (223). One end of the torsion spring (8) is limited to the center of the rotating column (22). One end is fixedly connected to the lock housing (100) in one slot (2241); the torsion spring (8) is used to drive the rotating column (22) to rotate and reset after the ball (23) is disengaged from the recess (11) and when the lock beam (1) is pressed down again, thereby completing the locking action; the locking mechanism (2) also includes a limiting mechanism (24) provided at the lower end of the rotating column (22) for limiting the rotation angle of the rotating column (22).
7. An electronic padlock according to claim 6, characterized in that: The limiting mechanism (24) includes a limiting piece (241) fixedly disposed in the lock housing (100), the limiting piece (241) having a shaped groove (2411), the rotating column (22) including a protrusion (225) rotatably disposed in the shaped groove (2411), the shaped groove (2411) including two symmetrically arranged 90-degree fan-shaped grooves (24111).
8. An electronic padlock according to claim 7, characterized in that: The lock housing (100) has a cavity (101) for accommodating the ball (23) and allowing it to move. The outer wall of the cavity (101) has a limiting surface for preventing the ball (23) from completely exiting the cavity (101). The lock housing (100) also has a first channel (102) and a second channel (103) for accommodating the two ends of the lock beam (1) and allowing it to move.
9. An electronic padlock according to claim 8, wherein: The lock housing (100) has a first drain hole (104) that communicates with the first channel (102) on its side wall, and a second drain hole (105) that communicates with the second channel (103) is also provided on the side wall of the lock housing (100).
10. An electronic padlock according to claim 9, characterized in that: The lock housing (100) includes a base plate (106), the base plate (106) includes an annular connecting part (1061) and a mounting groove (1062) formed in the annular connecting part (1061). A support column (1063) is provided in the middle of the mounting groove (1062). A through hole (51) for inserting the support column (1063) is provided on the sensing circuit board (5). The sensing circuit board (5) is embedded in the mounting groove (1062). A waterproof gasket (9) is fitted on the outer wall of the annular connecting part (1061). A corresponding annular groove (107) for embedding the waterproof gasket (9) is provided at the lower end of the lock housing (100).