Connection structure of retrofit smart lock
By designing the interlocking and connecting shaft between the smart lock sticker and the mechanical lock cylinder, the problem of requiring an additional mounting plate for existing smart lock stickers is solved, achieving a stable connection, simplified installation, expanded application range, reduced costs, and adaptability to door bodies of different thicknesses.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- YU YANXUE
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-09
AI Technical Summary
Existing smart lock stickers require additional mounting plates or clamping devices to connect to the mechanical lock cylinder, increasing cost, complexity, and space occupation. They are also incompatible with most mechanical lock cylinders, especially those that are fully embedded in the door.
The first protrusion engages with the first groove of the lock housing and is connected by a fixing mechanism. The connecting shaft drives the lock cylinder to rotate, eliminating the need for an additional mounting plate. This allows it to adapt to door bodies of different thicknesses and expands its application range through the extension of the lock housing and the extension of the lock cylinder.
It achieves plug-and-play functionality, robust connection, simplified installation process, reduced costs, expanded application range, improved security and adaptability, and reduced size and failure rate.
Smart Images
Figure CN2025116013_09072026_PF_FP_ABST
Abstract
Description
A connection structure for a smart lock Technical Field
[0001] This invention relates to the field of locks, specifically to the design of a connection structure for an intelligent lock pad. Background Technology
[0002] With the rapid development of technologies such as the Internet of Things (IoT), mobile internet, and artificial intelligence (AI), smart locks have been rapidly adopted as part of smart homes. Smart locks not only offer enhanced security but also provide functions such as remote control, automatic unlocking, user access management, and access logging. However, existing smart locks typically require a complete replacement of the original mechanical lock system, which increases costs for users and wastes resources.
[0003] Against this backdrop, smart lock stickers have emerged as an innovative solution. A smart lock sticker is a device specifically designed to connect to a standard mechanical lock cylinder, adding intelligent features without altering the original mechanical lock's structure. By installing a smart lock sticker, users can retain their existing mechanical lock cylinder while enjoying the various conveniences and advanced functions offered by smart locks.
[0004] Currently available smart lock sticker solutions generally require an additional mounting plate to connect the mechanical lock cylinder to the smart lock sticker. This not only increases the number of parts, leading to higher manufacturing and assembly costs, but also makes the entire installation process more complex. For ordinary users, the extra installation steps may be beyond their skill level, forcing them to seek professional help, thus increasing installation time and costs. Furthermore, the additional mounting plate often occupies space on the door surface, potentially disrupting the overall aesthetics of the door, especially in situations where decoration is important. In addition, the mounting plate can become a breeding ground for dust and other dirt, affecting long-term cleaning and maintenance. Moreover, to facilitate connection with the mechanical lock cylinder, existing smart lock stickers typically have a relatively complex internal structure to ensure stable operation with various types of lock cylinders. However, this complexity results in increased size, making the smart lock sticker occupy more space and increasing installation difficulty. The larger size is not only unfavorable for installation in space-constrained situations but may also affect the overall appearance of the door and ease of operation. Furthermore, the complex design also means a higher failure rate and maintenance costs, placing an additional burden on users. For example, the Chinese invention patent with authorization announcement number CN114562157B, publication date May 31, 2022, and patent name "Installation Structure of Mechanical Lock Drive Device" has the above-mentioned situation.
[0005] Another common connection method is to connect the smart lock sticker to the mechanical lock cylinder using a clamping device. However, a key prerequisite for this method is that the mechanical lock cylinder must be partially exposed outside the door panel for effective clamping. Because traditional mechanical door locks were not designed with future smart upgrades in mind, the lock cylinder is usually completely embedded in the door, leaving no space for clamping. This greatly limits the application of clamping connections, making them unsuitable for many existing mechanical door lock systems. Even in certain special cases where clamping connections can be achieved, the clamping force is difficult to control precisely, potentially leading to insecure clamping and affecting the security and stability of the smart lock sticker. If the clamping is too loose, the smart lock sticker may fall off during use; if the clamping is too tight, it may damage the lock cylinder or the door.
[0006] Therefore, overcoming the aforementioned defects and providing a connection structure for a smart lock that is stable and easy to install has become an important issue that needs to be addressed by those skilled in the art. Summary of the Invention
[0007] This invention overcomes the shortcomings of the above-mentioned technologies and provides a connection structure for an intelligent locking device.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A smart lock sticker connection structure includes a mechanical lock and a smart lock sticker connected to the mechanical lock. The mechanical lock includes a lock shell and a lock cylinder. A lock cylinder is installed inside the lock cylinder. The smart lock sticker is used to drive the lock cylinder to rotate, thereby locking / unlocking the mechanical lock. One end of the lock cylinder has a keyhole, and the other end of the lock cylinder has a connection hole for connecting to the smart lock sticker. The smart lock sticker includes a connector. The outer wall of the connector has a first protrusion. The side wall of the lock shell has a corresponding first groove for the first protrusion to fit into. The first protrusion and the first groove are connected by a fixing mechanism to connect and fix the mechanical lock to the smart lock sticker. A connecting shaft with both ends protruding from the connector is rotatably connected to the middle of the connector. One end of the connecting shaft is limited and connected to the connection hole to drive the lock cylinder to rotate synchronously, and the other end is connected to the inside of the smart lock sticker.
[0010] Furthermore, the fixing mechanism includes a first screw hole in the connector, a second screw hole in the first groove, and a bolt installed in the first screw hole and the second screw hole. The bolt passes through the first screw hole and is threaded into the second screw hole. The head of the bolt is recessed into the first screw hole and is lower than the inner wall surface of the connector.
[0011] Furthermore, a lock case extension and a lock cylinder extension are provided between the mechanical lock and the connector. The lock case extension is used to extend the lock case and its structure matches the lock case. The lock cylinder extension is used to extend the lock cylinder and its structure matches the connecting hole. The lock case extension has a second protrusion on one side with the same structure as the first protrusion and a second groove on the other side with the same structure as the first groove. The second groove has a third screw hole with the same structure as the second screw hole. The second protrusion is fitted into the first groove, and the first protrusion is fitted into the second groove. The lock case extension includes a lock cylinder mounting hole. The lock cylinder extension is installed in the lock cylinder mounting hole. One side of the lock cylinder extension is fitted into the connecting hole, and the other side is limited and connected to the connecting shaft.
[0012] Furthermore, the smart lock also includes a housing rotatably connected to the connector. The housing includes a top cover and a sleeve detachably connected to the top cover. The top cover has a mounting cavity at one end facing the connector. The bottom of the mounting cavity is recessed to form a mounting groove. The connector is embedded in the mounting cavity. One end of the connecting shaft is fixedly installed in the mounting groove. A third screw hole is opened on the side wall of the top cover. A fourth screw hole is opened on the connecting shaft. A second bolt is recessed in the third screw hole, passing through the third screw hole and threaded into the fourth screw hole.
[0013] Furthermore, the connector has an annular inner ring and a first annular groove formed on the outer periphery of the annular inner ring on the side facing the upper cover. The mounting cavity is provided with a second annular groove for the connector to be embedded in. The mounting cavity is also provided with a third annular groove formed on the outer periphery of the upper end of the mounting groove. The annular inner ring is embedded in the third annular groove.
[0014] Furthermore, the smart lock also includes a detachable mounting base installed inside the sleeve. The mounting base is detachably connected to the upper cover. A positioning pin is provided at the upper end of the mounting base, and a corresponding positioning hole for the positioning pin is provided on the upper cover. A protruding strip is provided on the side wall of the mounting base, and a slotted groove is provided on the inner wall of the sleeve for the protruding strip to engage. A motor, a control circuit board, a battery, and a gear transmission assembly are connected to the mounting base. The motor and battery are both electrically connected to the control circuit board. The sleeve includes a detachable base plate, and a button for driving the motor is provided on the outer side of the base plate. The motor can... The drive gear transmission assembly moves to rotate the connecting shaft, thereby locking / unlocking the mechanical lock. The first annular groove sidewall is circumferentially provided with several internal gear teeth. The gear transmission assembly meshes with the internal gear teeth. The motor is connected to a motor gear that can rotate with the motor shaft. The motor gear passes upward through the fixed seat and meshes with the gear transmission assembly. The sidewall of the fixed seat is recessed to provide a motor receiving cavity for accommodating the motor. The sidewall of the fixed seat is also recessed to provide a battery receiving cavity for accommodating the battery. The upper middle part of the fixed seat is also provided with a clearance groove for the lower end of the mounting groove to be embedded.
[0015] Furthermore, the gear transmission assembly includes a first gear meshing with a motor gear, a second gear coaxially connected above the first gear and rotating synchronously with the first gear, a third gear meshing with the second gear, a fourth gear coaxially connected above the third gear and rotating synchronously with the third gear, a swing arm coaxially disposed above the fourth gear and capable of rotating relative to the fourth gear, a clutch gear rotatably connected to the swing arm and meshing with the fourth gear, a fifth gear meshing with the clutch gear after the clutch gear has rotated to its position, and a sixth gear coaxially connected above the fifth gear and rotating synchronously with the fifth gear, wherein the sixth gear meshes with an inner gear tooth.
[0016] Furthermore, the swing arm includes an upward-facing connecting column, and the lower end of the upper cover is provided with a first limiting hole. The connecting column is rotatably connected to the first limiting hole. The swing arm also includes a downward-facing first gear shaft, and a clutch gear is rotatably sleeved on the first gear shaft. Two clutch gears are provided on both the first gear shaft and the clutch gear. When the motor rotates forward to its final position, one clutch gear can mesh with the fifth gear; when the motor rotates in reverse to its final position, the other clutch gear can mesh with the fifth gear. The upper cover has a through hole through which a sixth gear passes and can rotate. After exiting the through hole, it meshes with the inner gear teeth. The fixed seat is circumferentially fixed relative to the sleeve. The fixed seat also has a second gear shaft and a third gear shaft fixedly installed. The first gear and the second gear are coaxially sleeved on the second gear shaft and can rotate synchronously. The third gear and the fourth gear are coaxially sleeved on the third gear shaft and can rotate synchronously. The fifth gear and the sixth gear are coaxially connected and fixed through the fourth gear shaft and rotate synchronously. The upper end of the fixed seat has a second limiting hole. The lower end of the fourth gear shaft is fixedly connected to the second limiting hole. When the fixed seat rotates relative to the connector, the sixth gear moves around the inner gear teeth.
[0017] Furthermore, the control circuit board has a positive conductive part and a negative conductive part on the side facing the top cover. A conductive spring extending vertically upward is connected to the negative conductive part. The conductive spring includes a connecting end, a spring end, and a vertical rod located between the connecting end and the spring end. The connecting end is connected to the negative conductive part. The positive electrode of the battery abuts against the positive conductive part, and the negative electrode of the battery abuts against the spring end. The battery is vertically arranged between the positive conductive part and the spring end. A first positioning groove for supporting and fixing the vertical rod and a second positioning groove for supporting and fixing the spring end are formed on the inner wall surface of the battery receiving cavity.
[0018] Furthermore, three positive conductive parts and three negative conductive parts are provided respectively, and three batteries and three battery housing cavities are provided respectively. The connection end is connected and fixed to the control circuit board by screws. The screws pass upward through the control circuit board and are threaded to the bottom of the fixing base. The side of the control circuit board facing the top cover is also provided with a socket and a USB interface. The side of the control circuit board facing the bottom plate is provided with buttons and LEDs. Several LEDs are equidistantly arranged around the circumference of the control circuit board. The bottom plate is made of light-transmitting material. The side of the control circuit board facing the bottom plate is also provided with a buzzer and a reset button.
[0019] Compared with the prior art, the beneficial effects of the present invention are:
[0020] 1. Existing smart lock stickers typically require an additional mounting plate to connect the mechanical lock cylinder and the smart lock sticker. This not only increases the number of parts and costs but also complicates the installation process. This invention eliminates the need for an additional mounting plate by directly utilizing the internal space of the lock cylinder. Specifically, a first protrusion is provided on the outer wall of the connector, which fits into a first groove on the lock housing and is connected by a fixing mechanism. Then, a connecting shaft 12 is used to limit the connection to a connecting hole, thereby driving the lock cylinder to rotate synchronously and unlock the smart lock sticker. This structure achieves an integrated design without the need for an additional mounting plate, significantly simplifying the installation steps, reducing the number of required parts, lowering the overall cost, and improving product adaptability and installation efficiency.
[0021] 2. Secondly, the first protrusion is fitted into the first groove on the lock shell and connected by a fixing mechanism. The other end of the lock cylinder is provided with a connecting hole. One end of the connecting shaft is limited and connected to the connecting hole, thereby driving the lock cylinder to rotate synchronously to unlock the smart lock sticker. This design ensures that even if the lock cylinder is completely embedded in the door, the smart lock sticker can be installed smoothly through the connecting shaft, greatly expanding the application range and making it compatible with various types of mechanical lock cylinders, including those that are completely embedded in the door, achieving true plug and play.
[0022] 3. In this invention, the first protrusion and the first groove are connected by a fixing mechanism, thus securing the smart lock sticker to the mechanical lock. This design provides a stable connection point, preventing the smart lock sticker from shifting or falling off during use. It improves the stability and security of the connection between the smart lock sticker and the mechanical lock, ensuring stable operation of the smart lock sticker under various usage conditions.
[0023] 4. This design, by incorporating extended lock housings and extended lock cylinders, allows for the extension of the mechanical lock, enabling connection with the smart lock even when the mechanical lock is not exposed on the door. Furthermore, this extended structure design allows for installation on doors of varying thicknesses.
[0024] 5. This invention, by setting a vertically upward-extending conductive spring, places the positive and negative terminals of the control circuit board at the same end. This method of installing the battery at the same end reduces the footprint on the internal structure, eliminates cumbersome wiring connections, and reduces the overall size of the smart lock. When installing the battery, the user can easily and intuitively distinguish the positive and negative terminals of the control circuit board, facilitating battery installation. Attached Figure Description
[0025] Figure 1 is a structural schematic diagram of the mechanical lock and an exploded view of the smart lock sticker in this case.
[0026] Figure 2 is a schematic diagram of the mechanical lock and an exploded view of the smart lock sticker in this case.
[0027] Figure 3 is a schematic diagram of the connection status of the mechanical lock and the smart lock in this case.
[0028] Figure 4 is one of the structural schematic diagrams of the mechanical lock, connecting plate, extended lock shell, and extended lock cylinder in this case.
[0029] Figure 5 is the second structural schematic diagram of the mechanical lock, connecting plate, extended lock shell, and extended lock cylinder in this case.
[0030] Figure 6 is one of the structural schematic diagrams of the top cover in this case.
[0031] Figure 7 is the second structural schematic diagram of the top cover in this case.
[0032] Figure 8 is a structural diagram of the mounting base, motor, control circuit board, battery and gear transmission assembly in the assembled state.
[0033] Figure 9 is one of the structural schematic diagrams of the fixed base in this case.
[0034] Figure 10 is the second structural schematic diagram of the fixed base in this case.
[0035] Figure 11 is a schematic diagram of the structure of the motor and gear transmission mechanism in this case.
[0036] Figure 12 is a structural diagram of the control circuit board and battery assembly in this case.
[0037] Figure 13 is a schematic diagram of the disassembled components shown in Figure 12 of this case.
[0038] Figure 14 is a schematic diagram of the control circuit board in this case. Detailed Implementation
[0039] The following examples further illustrate the features and other related characteristics of the present invention in detail, to facilitate understanding by those skilled in the art:
[0040] As shown in Figures 1 to 14, this invention provides a connection structure for a smart lock sticker, including a mechanical lock 100 and a smart lock sticker 200 connected to the mechanical lock 100. The mechanical lock 100 includes a lock housing 101 and a lock cylinder 102, with a lock cylinder 103 installed inside the lock cylinder 102. One end of the lock cylinder 103 has a keyhole 1031 to retain the basic unlocking function of the mechanical lock. The smart lock sticker 200 is used to drive the lock cylinder 103 to rotate, thereby locking / unlocking the mechanical lock 100. The other end of the lock cylinder 103 has a connection hole 1032 for connecting to the smart lock sticker 200. The smart lock sticker 200 includes a connector 1, with a first protrusion 11 on the outer side wall of the connector 1, and a corresponding first groove 1011 on the side wall of the lock housing 101 for the first protrusion 11 to fit into. In specific implementation, the first groove 1011 and the first protrusion 11 are shaped to match, meaning the first protrusion 11 can be completely embedded in the first groove 1011. This interlocking design provides a stable connection point, effectively ensuring the stability of the connection between the smart lock sticker 200 and the mechanical lock 100, while also facilitating their positioning and connection. Secondly, compared to existing technologies, this structure eliminates the need for a fixing plate, making installation simple and convenient. The first protrusion 11 and the first groove 1011 are connected by a fixing mechanism, thereby fixing the mechanical lock 100 to the smart lock sticker 200. This fixing mechanism ensures the reliability and security of the connection between the mechanical lock 100 and the smart lock sticker 2000. A connecting shaft 12 with both ends extending out of the connector 1 is rotatably connected to the middle of the connector 1. One end of the connecting shaft 12 is limited and connected to the connecting hole 1032, thereby driving the lock cylinder 103 to rotate synchronously; the other end is connected to the inside of the smart lock sticker 200. In practical implementation, the shape of the connecting hole 1032 of the lock cylinder 103 matches that of the connecting shaft 12. Through the limiting connection between the two, the smart lock sticker 200 drives the lock cylinder 103, thereby realizing the intelligent control of the mechanical lock 100. This connection method, in which the connecting shaft 12 is directly inserted into the connecting hole 1032 of the lock cylinder 103, eliminates unnecessary installation components and facilitates installation. In practical implementation, the smart lock sticker 200 has an overall cylindrical structure. The effective cooperation of the structure design of the first protrusion 11 fitting into the first groove 1011 and the connecting shaft 12 being directly inserted into the connecting hole 1032 of the lock cylinder 103 eliminates the cumbersome process of installing a fixing plate, reduces the number of installation components, and most importantly, allows for effective installation even when the mechanical lock 100 is not exposed on the door or when dealing with door bodies of different thicknesses. It also simplifies the installation process, saves parts, and reduces production costs.
[0041] Specifically, as shown in Figures 1-5, the fixing mechanism includes a first screw hole 13 on the connector 1, a second screw hole 10111 in the first groove 1011, and a bolt 131 installed in the first screw hole 13 and the second screw hole 10111. The bolt 131 passes through the first screw hole 13 and is threaded into the second screw hole 10111. This bolt 131 connection method ensures the stability of the connection between the mechanical lock 100 and the smart lock sticker 200, effectively preventing the smart lock sticker 200 from loosening or falling off during use, thus improving security. Furthermore, this connection method is convenient to install and disassemble and has a low cost. The head of the bolt 131 is recessed into the first screw hole 13 and is lower than the inner wall surface of the connector 1. This recessed design effectively avoids its impact on other components at the lower end of the connector 1, preventing interference with the connection between the connector 1 and other components of the smart lock sticker 200.
[0042] Further, continuing as shown in Figures 1-5, this is a preferred embodiment of the present invention. In this embodiment, a lock shell extension 300 and a lock cylinder extension 400 are also provided between the mechanical lock 100 and the connector 1. The lock shell extension 300 is used to extend the lock shell 101 and its structure matches the lock shell 101. The lock cylinder extension 400 is used to extend the lock cylinder 102 and its structure matches the connecting hole 1032. One side of the lock shell extension 300 is provided with a second protrusion 301 with the same structure as the first protrusion 11, and the other side is provided with a groove 1011 with the same structure. The second groove 302 has a third screw hole 3021 with the same structure as the second screw hole 10111. The second protrusion 301 is fitted into the first groove 1011, and the first protrusion 11 is fitted into the second groove 302. The lock shell extension 300 includes a lock cylinder mounting hole 303, and the lock cylinder extension 400 is installed in the lock cylinder mounting hole 303. One side of the lock cylinder extension 400 is fitted into the connecting hole 1032, and the other side is limited and connected to the connecting shaft 12. It should be noted that the lock cylinder extension 400 is used to extend the lock cylinder part 102 and its structure matches the connecting hole 1032. That is to say, the shape, size and internal structure of the two are the same. It can be understood that the lock cylinder extension 400 is a part directly cut off from the cross-sectional direction of the connecting hole 1032 side of the lock cylinder part 102; the lock shell extension 300 is the same. By introducing the extended lock housing 300 and the extended lock cylinder 400, this invention can adapt to door panels of different thicknesses, greatly expanding its application range. Users can select appropriate extension components according to their actual needs, achieving true plug-and-play functionality and greatly facilitating installation and use.
[0043] As shown in Figures 1-7, the smart lock sticker 200 further includes a housing 2 rotatably connected to the connector 1. The housing 2 includes a top cover 21 and a sleeve 22 detachably connected to the top cover 21. The detachable design of the housing 2 facilitates maintenance and upgrades of the smart lock sticker's internal components. The top cover 21 has a mounting cavity 211 at the end facing the connector 1, and a mounting groove 212 is formed by an indentation at the bottom of the mounting cavity 211. The mounting cavity 211 accommodates the connector 1, ensuring its secure embedding. The connector 1 is embedded in the mounting cavity 211, and one end of the connecting shaft 12 is fixedly installed in the mounting groove 212. The mounting groove 212 fixes one end of the connecting shaft 12, provides a connection position for the connecting shaft 12, and ensures accurate alignment. The design of the mounting cavity 211 and the mounting groove 212 reduces assembly errors and improves assembly convenience. A third screw hole 213 is provided on the side wall of the upper cover 21, and a fourth screw hole 121 is provided on the connecting shaft 12. A second bolt 2131 is recessed into the third screw hole 213, passing through the third screw hole 213 and threaded into the fourth screw hole 121. The connecting shaft 12 and the upper cover 21 are fixed relative to each other by the second bolt 2131 to achieve synchronous rotation of the two. The user can drive the connecting shaft 12 to rotate by rotating the outer casing 2, thereby locking / unlocking the mechanical lock 100. This design realizes the knob function of the smart lock sticker 200.
[0044] Continuing as shown in Figures 1-7, the connector 1 has an annular inner ring 14 and a first annular groove 15 formed on the outer periphery of the annular inner ring 14 on the side facing the upper cover 21. The mounting cavity 211 has a second annular groove 214 for the connector 1 to be inserted into, and a third annular groove 215 formed on the outer periphery of the upper end of the mounting groove 212. The annular inner ring 14 is embedded in the third annular groove 215. This structural design achieves a stable fit between the connector 1 and the upper cover 21, facilitating the positioning and connection of the connector 1 and the upper cover 21, and effectively ensuring the stability and accuracy of the rotation of the upper cover 21 relative to the connector 1.
[0045] Furthermore, as shown in Figures 1-14, the smart lock sticker 200 of this invention also includes a fixing seat 3 that can be detachably installed inside the sleeve 22. The fixing seat 3 is detachably connected to the upper cover 21, so that the user can easily open the upper cover 21 to inspect the fixing seat 3 and the inside of the sleeve 22. In specific implementation, the fixing seat 3 and the upper cover 21 are detachably connected by using a screw thread connection. This connection method is simple in structure and easy to operate. The upper end of the fixing seat 3 is provided with a positioning pin 31, and the upper cover 21 is provided with a positioning hole 216 for the positioning pin 31 to be inserted. The cooperation of the positioning pin 31 and the positioning hole 216 facilitates the quick and accurate positioning and installation of the fixing seat 3 and the upper cover 21, and can effectively improve the stability of the connection between the two. The side wall of the fixing seat 3 is provided with a protrusion 32, and the inner wall of the sleeve 22 is provided with a strip groove 221 for the protrusion 32 to be engaged. Two, three, or four protruding strips 32 and strip grooves 221 can be arranged circumferentially. The limiting fit between the protruding strips 32 and strip grooves 221 facilitates the sliding assembly and disassembly of the fixed base 3 and the sleeve 22; at the same time, it is used to limit the circumferential movement of the fixed base 3 and the sleeve 22, that is, to allow the two to rotate together. In specific implementation, the sleeve 22 and the fixed base 3 are also fixed by bolts.
[0046] Referring to Figures 1-14, a motor 4, a control circuit board 5, a battery 6, and a gear transmission assembly 7 are connected to the mounting base 3. Both the motor 4 and the battery 6 are electrically connected to the control circuit board 5. The mounting base 3 provides an installation platform to ensure stable installation of the components. The sleeve 22 includes a removable base plate 222. This removable base plate 222 facilitates maintenance of the internal components of the sleeve 22 and allows for easy replacement of the battery 6. A button 2221 for driving the motor 4 is located on the outer side of the base plate 222, enabling the smart lock 200 to be unlocked via a button. In practice, the control circuit board 5 can control the smart lock 200 using a mobile app, NFC, or Bluetooth, providing multiple intelligent control methods and enhancing user convenience. The motor 4 drives the gear transmission assembly 7, thereby rotating the connecting shaft 12 to lock / unlock the mechanical lock 100. The first annular groove 15 has several internal gear teeth 151 arranged circumferentially on its side wall. The gear transmission assembly 7 meshes with the internal gear teeth 151. A motor gear 42, which can rotate with the motor shaft 41, is connected to the motor 4. The motor gear 42 extends upward through the fixed seat 3 and meshes with the gear transmission assembly 7. The motor 4 transmits power to the connecting shaft 12 through the gear transmission assembly 7, realizing the locking / unlocking operation of the mechanical lock 100. The gear transmission assembly 7 achieves precise power transmission, ensuring the reliability and response speed of the system. The meshing of the gear transmission assembly 7 with the internal gear teeth 151 ensures the accuracy, stability, and reliability of power transmission when using the motor 4 to unlock, and ultimately transmits the power output by the motor 4 from the gear transmission assembly 7. The side wall of the fixed seat 3 is recessed to provide a motor receiving cavity 33 for accommodating the motor 4, and the side wall of the fixed seat 3 is also recessed to provide a battery receiving cavity 34 for accommodating the battery 6. The structural design of the motor housing 33 and battery housing 34 makes reasonable use of the structure of the mounting base 3, which helps to reduce the space occupied inside the sleeve 22, thereby reducing the overall size of the smart lock 200 and making it suitable for more installation environments. It also facilitates installation, transportation, and storage. Simultaneously, the motor housing 33 allows the motor 4 to be securely mounted on the mounting base 3, and the battery housing 34 allows the battery 6 to be securely mounted on the mounting base 3, improving the overall structural connection stability. An avoidance groove 35 is also provided in the upper middle part of the mounting base 3 for the lower end of the mounting slot 212 to be embedded, further reducing the installation space and the overall size of the smart lock 200 by making reasonable use of space.
[0047] Referring to Figures 1-5, 8, and 11, the gear transmission assembly 7 includes a first gear 71 meshing with the motor gear 42, a second gear 72 coaxially connected above the first gear 71 and rotating synchronously with the first gear 71, a third gear 73 meshing with the second gear 72, a fourth gear 74 coaxially connected above the third gear 73 and rotating synchronously with the third gear 73, a rocker arm 75 coaxially disposed above the fourth gear 74 and capable of rotating relative to the fourth gear 74, a clutch gear 76 rotatably connected to the rocker arm 75 and meshing with the fourth gear 74, a fifth gear 77 meshing with the clutch gear 76 after the clutch gear 76 has rotated to its position, and a sixth gear 78 coaxially connected above the fifth gear 77 and rotating synchronously with the fifth gear 77. The sixth gear 78 meshes with the inner gear teeth 151. The rotation of the swing arm 75 allows for flexible control of the clutch gear 76's movement. This control, through the engagement and disengagement of the clutch gear 76 and the fifth gear 77, enables switching between motor 4 unlocking and knob unlocking. Even if the motor 4 is damaged or the battery 6 is dead, the user can still unlock using the knob unlocking method. This structure also effectively protects the motor 4. Specifically, if the motor 4 fails when the clutch gear 76 and fifth gear 77 are disengaged, or if the battery 6 is dead and cannot unlock, the user can unlock by rotating the housing 2. If the motor 4 fails when the clutch gear 76 and fifth gear 77 are engaged, or if the battery 6 is dead and cannot unlock, this usually occurs when the motor 4's unlocking action is halfway through. In this case, the user can still unlock by rotating the housing 2. Specifically, the rotation of the housing 2 activates the reverse drive gear transmission mechanism 7. Preferably, the first gear 71 and the second gear 72 are integrally designed double gears, and the third gear 73 and the fourth gear 74 are integrally designed double gears. These are separated and named for clarity of description and understanding. The multi-stage gear meshing transmission design of the aforementioned gear transmission assembly 7 facilitates smoother and more precise unlocking.
[0048] It should be noted that the inner gear teeth 151 are disposed on the side wall of the first annular groove 15 of the connector 1, and several are circumferentially distributed thereon, always maintaining meshing with the sixth gear 78. The placement of the inner gear teeth 151 provides stable support for the sixth gear 78, ensuring that it will not deviate or wobble during rotation. At the same time, it determines and guides the movement trajectory of the sixth gear 78, ensuring that it rotates smoothly along the predetermined path, guaranteeing the accuracy and stability of power transmission, and avoiding power loss or failure caused by gear misalignment. The inner gear 151 and the sixth gear 78 form a closed transmission chain through precise meshing, which effectively ensures that the power transmitted by the motor 4 through the gear transmission assembly 7 can accurately reach the connecting shaft 12, ultimately realizing the locking / unlocking operation of the mechanical lock 100. Through this tight meshing structure design, energy loss during power transmission is reduced, the efficiency of the system is improved, and each unlocking / locking action can be executed accurately, avoiding failures caused by transmission errors. Through precise gear meshing, vibration and noise are reduced, making the unlocking action smoother. And through reasonable spatial layout, the overall volume is reduced, making the smart lock sticker 200 lighter and more compact.
[0049] Referring again to Figures 1-5, 8, and 11, the swing arm 75 further includes an upward-facing connecting post 751. The lower end of the upper cover 21 has a first limiting hole 217, and the connecting post 751 is rotatably connected to the first limiting hole 217. The rotatable connection of the connecting post 751 to the first limiting hole 217 ensures that the swing arm 75 can rotate relative to the gear, while also limiting the swing arm 75 to prevent displacement that could affect the entire gear transmission mechanism 7. The swing arm 75 also includes a downward-facing first gear shaft 752, on which the clutch gear 76 is rotatably mounted. The first gear shaft 752 provides a stable rotational fulcrum and limiting support for the clutch gear 76, effectively preventing the clutch gear 76 from disengaging from the fourth gear 75. In this embodiment, two first gear shafts 752 and two clutch gears 76 are provided. When motor 4 rotates forward to its designated position, one clutch gear 76 can engage with the fifth gear 77; when motor 4 rotates in reverse to its designated position, the other clutch gear 76 can engage with the fifth gear 77. By using different clutch gears 76 to lock / unlock via the forward and reverse rotation of motor 4, the stability and service life of the clutch gears 76 and the entire gear transmission mechanism 7 are effectively improved, the unlocking stroke of motor 4 is reduced, and a faster response is achieved. As mentioned above, by setting two clutch gears 76, power consumption can be effectively saved, losses reduced, wear on the clutch gears 76 distributed, and the stability and service life of the entire gear transmission mechanism 7 improved.
[0050] It should be noted that the dual-clutch gear 76 makes the system more stable and reduces the probability of overall failure due to the failure of a single component. Even if one clutch gear 76 malfunctions, the other can still work normally, and the entire gear transmission mechanism 7 can still operate normally, enhancing the system's fault tolerance. By using two clutch gears 76 to handle the forward and reverse rotation of the motor 4 respectively, the logic design of the control system is simplified. The control system only needs to select the corresponding clutch gear 76 according to the rotation direction of the motor 4, without the need for complex intermediate state switching, reducing the complexity of the control system, improving control accuracy, and avoiding malfunctions caused by intermediate state switching.
[0051] Referring to Figures 1-5, 8, and 11, a through hole 218 is provided on the upper cover 21 for the sixth gear 78 to pass through and rotate within. After passing through the through hole 218, the sixth gear 78 meshes with the inner gear tooth 151. The design of the through hole 218 provides installation and movement space for the sixth gear 78, allowing it to smoothly mesh with the inner gear tooth 151 and complete the final power transmission. This design ensures a reasonable layout between the various components, reduces unnecessary space waste, and makes the installation process simpler and faster. The fixing base 3 is circumferentially fixed relative to the sleeve 22 to rotate synchronously with the sleeve 22, thereby realizing the locking / unlocking of the knob. The fixing base 3 also has a second gear shaft 711 and a third gear shaft 731 fixedly installed. The first gear 71 and the second gear 72 are coaxially sleeved on the second gear shaft 711 and can rotate synchronously. The third gear 73 and the fourth gear 74 are coaxially sleeved on the third gear shaft 731 and can rotate synchronously. The second gear shaft 711 and the third gear shaft 731, fixedly mounted on the fixed base 3, provide stable rotation shafts for the first gear 71, the second gear 72, the third gear 73, and the fourth gear 74, respectively, while also providing support to ensure synchronous rotation among these gears and improve power transmission efficiency. The fifth gear 77 and the sixth gear 78 are coaxially connected and fixed, rotating synchronously, via the fourth gear shaft 771. The upper end of the fixed base 3 has a second limiting hole 36, and the lower end of the fourth gear shaft 771 is fixedly connected to the second limiting hole 36. When the fixed base 3 rotates relative to the connector 1, the sixth gear 78 moves around the inner gear tooth 151. The design of the second limiting hole 36 provides installation space for the fourth gear shaft 771. Since the fourth gear shaft 771 is fixedly connected to the fixed base 3, when the user rotates the outer casing 2, it drives the fixed base 3 to rotate synchronously, thereby enabling the sixth gear 78 to move around the inner gear tooth 151, achieving smooth and precise knob-style locking / unlocking.
[0052] As shown in Figures 1-5, 8, and 12-14, the control circuit board 5 has a positive conductive part 51 and a negative conductive part 52 on the side facing the upper cover 21. The positive conductive part 51 and the negative conductive part 52 are used to connect the positive and negative terminals of the battery 3 to achieve electrical connection between the battery 3 and the control circuit board 5. A vertically extending conductive spring 53 is connected to the negative conductive part 52. The conductive spring 53 includes a connecting end 531, a spring end 532, and a vertical rod 533 located between the connecting end 531 and the spring end 532. The spring end 532 provides elastic contact pressure to ensure that the negative terminal of the battery 6 always maintains good contact with the negative conductive part 52. The connecting end 531 is connected to the negative conductive part 52, the positive terminal of the battery 6 abuts against the positive conductive part 51, and the negative terminal of the battery 6 abuts against the spring end 532. The battery 6 is vertically disposed between the positive conductive part 51 and the spring end 532. The inner wall of the battery housing cavity 34 is provided with a first positioning groove 341 for supporting and fixing the vertical rod 533 and a second positioning groove 342 for supporting and fixing the spring end 532. The cooperation of the first positioning groove 341 and the second positioning groove 342 ensures that the conductive spring 53 is stably installed on the fixing base 3, ensuring the stability of the electrical connection system. Through reasonable layout and compact design, the battery 6 and other components can be reasonably arranged, reducing unnecessary space waste. The first positioning groove 341 and the second positioning groove 342 on the inner wall of the battery housing cavity 34 ensure that each part of the conductive spring 53 can be firmly fixed in the appropriate position, optimizing the use of internal space. By setting the positive conductive part 51 and the negative conductive part 52 at the same end, the battery 6 can be placed vertically on one side of the control circuit board 5. This same-end design makes the space arrangement between the battery and other components more compact, reducing unnecessary gaps. Traditional battery installation methods often require the use of multiple wires to connect the positive and negative terminals of the battery to the control circuit board, increasing assembly difficulty and failure risk. The same-end design achieves electrical connection directly through the conductive spring 53, eliminating the need for additional wires and simplifying the electrical connection process. Users only need to insert the battery 6 vertically to complete the installation. Users can easily and intuitively distinguish the positive and negative polarity of the battery 6 during installation, greatly facilitating daily use and maintenance. Especially when multiple batteries 6 need to be installed, installing one battery 6 allows for quick installation of the others without having to re-confirm the positive and negative polarity. This same-end design makes installation much faster.
[0053] Referring further to Figures 1-5, 8, and 12-14, to accommodate more batteries 6 and provide more power to increase the battery life of the smart lock 200, in this embodiment, three positive conductive parts 51 and three negative conductive parts 52 are respectively provided, and correspondingly, three batteries 6 and three battery housing cavities 34 are provided. The connection end 531 is connected and fixed to the control circuit board 5 by screws 54 to prevent the conductive spring 53 from loosening and to ensure that the conductive spring 53 is stably and firmly fixed to the control circuit board 5. The screws 54 pass upward through the control circuit board 5 and are threaded to the bottom of the fixing base 3 to ensure a stable connection between the control circuit board 5 and the fixing base 3, ensuring the stability of the entire electrical system. The side of the control circuit board 5 facing the top cover 21 is also provided with a socket 55 and a USB interface 56. The socket 55 and the USB interface 56 provide various power supply interfaces and data transmission interfaces, facilitating the debugging of the smart lock 200 and the charging of the batteries 6. The control circuit board 5, facing the base plate 222, has a button 57 and LEDs 58. Several LEDs 58 are evenly spaced around the circumference of the control circuit board 5. The base plate 222 is made of a light-transmitting material. The button 57 controls the smart lock 200 by pressing. The LEDs 58, in conjunction with the light-transmitting base plate 222, provide the smart lock 200 with indication of its working status and illumination, making operation more convenient for users. The control circuit board 5, facing the base plate 222, also has a buzzer 59 and a factory reset button 591. In practice, the buzzer 59 provides an audible alert to remind the user of the current working status or any abnormalities, helping the user to understand the status of the smart lock and avoid misoperation. The factory reset button 591 resets the settings of the smart lock 200, allowing users to quickly reset the smart lock 200 when needed, simplifying the maintenance process.
[0054] As described above, in this case, the connector 1 and the outer casing 2 are rotatable relative to each other. The connecting shaft 12 is rotatably connected to the connector 1 and one end is fixedly connected to the upper cover 21. Within the outer casing 2, the upper cover 21, the sleeve 22, and the fixing seat 3 are all circumferentially fixed. That is, when the smart lock pad 200 rotates, the entire outer casing 2 and its internal components rotate relative to the connector 1. Under this premise, the working principles of the manual rotation unlocking method and the electric unlocking method in this case will be described respectively.
[0055] Manual rotation unlocking method:
[0056] 1. First scenario: The user applies a certain torque by manually rotating the entire outer casing 2 (including the top cover 21 and the sleeve 22). Since the top cover 21, sleeve 22, and fixing base 3 in the outer casing 2 are all circumferentially fixed, the rotation of the outer casing 2 is transmitted to the sixth gear 78 through the top cover 21. The sixth gear 78 meshes with the inner gear 151. Under normal conditions, the clutch gear 76 is disengaged from the fifth gear 77. As the outer casing 2 rotates, the sixth gear 78 drives the connecting shaft 12 to rotate, thereby locking / unlocking the mechanical lock 100.
[0057] 2. Second scenario: Even if motor 4 has started but has not completed the unlocking action, or if motor 4 is damaged during the unlocking process or battery 6 is dead, the user can still reverse the gear transmission assembly 7 by rotating the outer casing 2. The user's rotational force on the outer casing 2 is transmitted to other gears in the gear transmission assembly 7 (such as the fifth gear 77) through the sixth gear 78, and continues to transmit power through the engagement of the clutch gear 76 until it is transmitted to motor 4. At the same time, the sixth gear 78 always remains engaged with the inner gear teeth 151, and continues to rotate with the outer casing 2. The sixth gear 78 drives the connecting shaft 12 to rotate, realizing the locking / unlocking action of the mechanical lock 100.
[0058] Electric unlocking method:
[0059] The user sends an unlocking command via button 2221 on the base plate 222 or through smart control methods (such as a mobile app, NFC, Bluetooth, etc.). Upon receiving the command, the control circuit board 5 starts the motor 4, causing it to rotate forward or backward to its designated position. When the motor 4 rotates forward, one of the clutch gears 76 engages with the fifth gear 77; when the motor 4 rotates backward, the other clutch gear 76 engages with the fifth gear 77. The clutch gear 76 drives the other gears (first gear 71 to sixth gear 78) in the gear transmission assembly 7 to rotate. The sixth gear 78 engages with the inner gear tooth 151, driving the connecting shaft 12 to rotate, thus enabling the mechanical lock 100 to complete the unlocking or locking action.
[0060] As stated above, this case protects a connection structure for a smart lock, 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. A connection structure for a smart lock sticker, comprising a mechanical lock (100) and a smart lock sticker (200) connected to the mechanical lock (100), wherein the mechanical lock (100) comprises a lock housing (101) and a lock cylinder (102), a lock cylinder (103) is installed inside the lock cylinder (102), and the smart lock sticker (200) is used to drive the lock cylinder (103) to rotate, thereby locking / unlocking the mechanical lock (100), wherein a keyhole (1031) is provided at one end of the lock cylinder (103), characterized in that: The other end of the lock cylinder (103) is provided with a connection hole (1032) for easy connection with the smart lock sticker (200). The smart lock sticker (200) includes a connector (1). The outer wall of the connector (1) is provided with a first protrusion (11). The side wall of the lock housing (101) is provided with a first groove (1011) for the first protrusion (11) to fit into. The first protrusion (11) and the first groove (1011) are connected by a fixing mechanism so that the mechanical lock (100) and the smart lock sticker (200) are connected and fixed. The middle part of the connector (1) is rotatably connected with a connecting shaft (12) with both ends protruding from the connector (1). One end of the connecting shaft (12) is limited and connected in the connection hole (1032) so as to drive the lock cylinder (103) to rotate synchronously, and the other end is connected to the inside of the smart lock sticker (200).
2. The connection structure of the smart lock according to claim 1, characterized in that: The fixing mechanism includes a first screw hole (13) opened on the connector (1), a second screw hole (10111) opened in the first groove (1011), and a bolt (131) installed in the first screw hole (13) and the second screw hole (10111). The bolt (131) passes through the first screw hole (13) and is threaded into the second screw hole (10111). The head of the bolt (131) is recessed into the first screw hole (13) and is lower than the inner wall surface of the connector (1).
3. The connection structure of the smart lock according to claim 2, characterized in that: Between the mechanical lock (100) and the connector (1), there is also a lock case extension (300) and a lock cylinder extension (400). The lock case extension (300) is used to extend the lock case (101) and its structure matches the lock case (101). The lock cylinder extension (400) is used to extend the lock cylinder (102) and its structure matches the connector hole (1032). The lock case extension (300) has a second protrusion (301) on one side with the same structure as the first protrusion (11) and a second groove (300) on the other side with the same structure as the first groove (1011). 02), the second groove (302) has a third screw hole (3021) with the same structure as the second screw hole (10111), the second protrusion (301) is fitted into the first groove (1011), the first protrusion (11) is fitted into the second groove (302), the lock shell extension (300) includes a lock cylinder mounting hole (303), the lock cylinder extension (400) is installed in the lock cylinder mounting hole (303), one side of the lock cylinder extension (400) is fitted into the connecting hole (1032), and the other side is limited and connected to the connecting shaft (12).
4. The connection structure of the smart lock according to any one of claims 1-3, characterized in that: The smart lock sticker (200) also includes a housing (2) rotatably connected to the connector (1). The housing (2) includes a top cover (21) and a sleeve (22) detachably connected to the top cover (21). The top cover (21) has an installation cavity (211) at one end facing the connector (1). The bottom of the installation cavity (211) is recessed to form an installation groove (212). The connector (1) is embedded in the installation cavity (211). One end of the connecting shaft (12) is fixedly installed in the installation groove (212). A third screw hole (213) is opened on the side wall of the top cover (21). A fourth screw hole (121) is opened on the connecting shaft (12). A second bolt (2131) is recessed in the third screw hole (213) and threaded into the fourth screw hole (121).
5. The connection structure of the smart lock according to claim 4, characterized in that: The connector (1) has an annular inner ring (14) and a first annular groove (15) formed on the side facing the upper cover (21). The mounting cavity (211) is provided with a second annular groove (214) for the connector (1) to be embedded. The mounting cavity (211) is also provided with a third annular groove (215) formed on the outer periphery of the upper end of the mounting groove (212). The annular inner ring (14) is embedded in the third annular groove (215).
6. The connection structure of the smart lock according to claim 5, characterized in that: The smart lock sticker (200) also includes a fixing seat (3) that can be detachably installed inside the sleeve (22). The fixing seat (3) is detachably connected to the upper cover (21). The upper end of the fixing seat (3) is provided with a positioning pin (31). The upper cover (21) is provided with a positioning hole (216) for the positioning pin (31) to be inserted. The side wall of the fixing seat (3) is provided with a protrusion (32). The inner wall of the sleeve (22) is provided with a strip groove (221) for the protrusion (32) to be inserted. The fixing seat (3) is connected to a motor (4), a control circuit board (5), a battery (6) and a gear transmission assembly (7). The motor (4) and the battery (6) are both electrically connected to the control circuit board (5). The sleeve (22) includes a detachable base plate (222). The outer side of the base plate (222) is provided with a button (222) for driving the motor (4) to work. 1) The motor (4) can drive the gear transmission assembly (7) to rotate the connecting shaft (12) so that the mechanical lock (100) is locked / unlocked. The first annular groove (15) has several internal gear teeth (151) arranged circumferentially on its side wall. The gear transmission assembly (7) meshes with the internal gear teeth (151). The motor (4) is connected to a motor gear (42) that can rotate with the motor shaft (41). The motor gear (42) passes through the fixed seat (3) upward and meshes with the gear transmission assembly (7). The side wall of the fixed seat (3) is recessed to provide a motor receiving cavity (33) for accommodating the motor (4). The side wall of the fixed seat (3) is also recessed to provide a battery receiving cavity (34) for accommodating the battery (6). The upper middle part of the fixed seat (3) is also provided with an avoidance groove (35) for the lower end of the mounting groove (212) to be embedded.
7. The connection structure of the smart lock according to claim 6, characterized in that: The gear transmission assembly (7) includes a first gear (71) meshing with a motor gear (42), a second gear (72) coaxially connected above the first gear (71) and rotating synchronously with the first gear (71), a third gear (73) meshing with the second gear (72), a fourth gear (74) coaxially connected above the third gear (73) and rotating synchronously with the third gear (73), a swing arm (75) coaxially disposed above the fourth gear (74) and capable of rotating relative to the fourth gear (74), a clutch gear (76) rotatably connected to the swing arm (75) and meshing with the fourth gear (74), a fifth gear (77) meshing with the clutch gear (76) after the clutch gear (76) has rotated to its position, and a sixth gear (78) coaxially connected above the fifth gear (77) and rotating synchronously with the fifth gear (77). The sixth gear (78) meshes with the inner gear teeth (151).
8. The connection structure of the smart lock according to claim 7, characterized in that: The swing arm (75) includes an upwardly facing connecting column (751), and the lower end of the upper cover (21) is provided with a first limiting hole (217). The connecting column (751) is rotatably connected to the first limiting hole (217). The swing arm (75) also includes a downwardly facing first gear shaft (752). The clutch gear (76) is rotatably sleeved on the first gear shaft (752). There are two of both the first gear shaft (752) and the clutch gear (76). When the motor (4) rotates forward to the position, one of the clutch gears (76) can mesh with the fifth gear (77). When the motor (4) rotates in reverse to the position, the other clutch gear (76) can mesh with the fifth gear (77). The upper cover (21) is provided with a through hole (218) through which the sixth gear (78) passes and can rotate. The sixth gear (78) passes through the through hole (218). 18) The gear is engaged with the inner gear teeth (151). The fixed seat (3) is circumferentially fixed relative to the sleeve (22). The fixed seat (3) is also fixedly installed with the second gear shaft (711) and the third gear shaft (731). The first gear (71) and the second gear (72) are coaxially sleeved on the second gear shaft (711) and can rotate synchronously. The third gear (73) and the fourth gear (74) are coaxially sleeved on the third gear shaft (731) and can rotate synchronously. The fifth gear (77) and the sixth gear (78) are coaxially connected and fixed through the fourth gear shaft (771) and rotate synchronously. The upper end of the fixed seat (3) is provided with a second limiting hole (36). The lower end of the fourth gear shaft (771) is fixedly connected in the second limiting hole (36). When the fixed seat (3) rotates relative to the connector (1), the sixth gear (78) moves around the inner gear teeth (151).
9. The connection structure of the smart lock sticker according to claim 6, characterized in that: The control circuit board (5) has a positive conductive part (51) and a negative conductive part (52) on the side facing the top cover (21). A conductive spring (53) extending vertically upward is connected to the negative conductive part (52). The conductive spring (53) includes a connecting end (531), a spring end (532), and a vertical rod (533) located between the connecting end (531) and the spring end (532). The connecting end (531) is connected to the negative conductive part (52). The positive electrode of the battery (6) abuts against the positive conductive part (51), and the negative electrode of the battery (6) abuts against the spring end (532). The battery (6) is vertically arranged between the positive conductive part (51) and the spring end (532). The inner wall of the battery receiving cavity (34) is provided with a first positioning groove (341) for supporting and fixing the vertical rod (533) and a second positioning groove (342) for supporting and fixing the spring end (532).
10. The connection structure of the smart lock according to claim 9, characterized in that: The positive conductive part (51) and the negative conductive part (52) are respectively provided in threes. The battery (6) and the battery housing cavity (34) are respectively provided in threes. The connection end (531) is connected and fixed to the control circuit board (5) by screws (54). The screws (54) pass upward through the control circuit board (5) and are threaded to the bottom of the fixing seat (3). The side of the control circuit board (5) facing the top cover (21) is also provided with a socket (55) and a USB interface (56). The side of the control circuit board (5) facing the bottom plate (222) is provided with a button (57) and an LED bead (58). Several LED beads (58) are arranged equidistantly along the circumference of the control circuit board (5). The bottom plate (222) is made of light-transmitting material. The side of the control circuit board (5) facing the bottom plate (222) is also provided with a buzzer (59) and a reset setting button (591).