Table tennis racket intelligent renting and renting cabinet

Abstract

The utility model discloses a table tennis racket intelligence rental cabinet belongs to intelligent leasing equipment technical field. The rental cabinet includes hardware equipment main part, and hardware equipment main part contains host case, and installs main control board, electromagnetic lock, voice module, power module and a plurality of handle sleeve in the case, and the top of case is equipped with lock and slide cover and slide bar, and one side is equipped with two -dimensional code, and handle sleeve bottom is equipped with RFID read -write antenna, main control board integrates wireless communication, power control and RFID module, table tennis racket handle bottom embeds RFID label, and electromagnetic lock and handle sleeve one -to -one corresponding and with data feedback line, and the matching wechat applet realizes the interaction of rental and return. The utility model discloses through the accurate identification racket identity of RFID, avoids impersonation and returns, and the rental process automation, deposit automatic return, and the slide cover structure adapts handle, and the experience is optimized with voice, lighting, can create income for main hall, satisfy user immediate demand, and be applicable to self -service table tennis hall.

Description

Technical Field

[0001] This utility model relates to the field of intelligent rental equipment technology, and in particular to an intelligent table tennis racket rental cabinet. Background Technology

[0002] With the rise of self-service table tennis halls, the demand for on-demand table tennis consumption has increased significantly. Most people in this consumer group do not have their own rackets or do not bring them when they need to play, and therefore urgently need convenient ways to obtain rackets.

[0003] Currently, the market lacks smart racket rental devices specifically designed for table tennis rackets. Only a few temporary rental solutions use general-purpose rental cabinets as substitutes, which have the following significant drawbacks:

[0004] Insufficient accuracy in rental and return identification: The smart racket rental cabinet for table tennis rackets lacks an RFID identification device, making it impossible to accurately determine whether the racket has been genuinely returned, or to identify whether the returned racket is the original rental racket. This poses a risk of defective rackets being returned under false pretenses.

[0005] The return process is cumbersome: deposit refunds require manual intervention or complex operations and cannot be automated and instant.

[0006] Poor user experience: The racket is stored in a fully enclosed manner, which prevents users from visually observing the racket's appearance and touching and feeling the elasticity of the rubber and the material of the blade, making it difficult to match personalized usage needs;

[0007] Poor adaptability: The universal rental locker is not designed with a locking structure for the unique shape of the ping-pong paddle handle, resulting in unstable locking or inconvenience in taking it out and putting it away.

[0008] Therefore, there is an urgent need for a smart racket rental cabinet specifically designed for table tennis racket rental scenarios, which features accurate recognition, convenient operation, and strong adaptability to address the shortcomings of existing technologies. Utility Model Content

[0009] The main purpose of this utility model is to propose a smart table tennis racket rental cabinet, which can effectively solve the problems in the background technology.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: a smart ping-pong paddle rental cabinet, comprising:

[0011] The main hardware device includes a host chassis, inside which a main control board, an electromagnetic lock, a voice module, and a power module are fixedly installed. Inside the host chassis, there are multiple handle sleeves for accommodating the handles of ping-pong paddles. The top of the host chassis has multiple locking slide covers and sliding strips that slide with the locking slide covers. A QR code for rental and return interaction is provided on one side of the host chassis. An RFID reading and writing antenna is fixedly installed on the bottom inner wall of the handle sleeve.

[0012] The main control board integrates a wireless communication module, a power control module, and an RFID module. The wireless communication module is used to establish a data connection with the server. The power control module is electrically connected to the electromagnetic lock, the voice module, the power module, and the RFID read / write antenna. The RFID module is electrically connected to the RFID read / write antenna.

[0013] The handle sleeve is a hollow structure adapted to the handle of a ping-pong paddle. The slide bar is connected to the main unit chassis. The locking slide cover has a first hole for inserting the ping-pong paddle handle. The top of the slide bar has a second hole that corresponds to the first hole and has a matching diameter.

[0014] The ping-pong paddle has a mounting hole at the bottom of the handle, and an RFID tag adapted to the RFID read / write antenna is embedded in the mounting hole.

[0015] The electromagnetic lock and the handle sleeve are one-to-one. The inner side of the lock handle cover is fixed with a buckle that matches the locking tongue of the electromagnetic lock. The electromagnetic lock is provided with a data feedback line that is electrically connected to the main control board. The data feedback line is used to transmit the opening and closing status of the electromagnetic lock to the main control board.

[0016] As a further description of the above technical solution, the handle sleeve is a rectangular hollow structure adapted to the handle of a table tennis racket.

[0017] As a further description of the above technical solution, both the first hole and the second hole are elliptical holes, and the first hole and the second hole have the same size.

[0018] As a further description of the above technical solution, the RFID read / write antenna is a patch structure, the RFID tag is a high-frequency tag conforming to the ISO14443A protocol, and the RFID tag is fixed in the mounting hole by epoxy resin adhesive.

[0019] As a further description of the above technical solution, the main body of the hardware device also includes a lighting module, which includes an LED light strip and a QR code background light sheet; the LED light strip is fixed around the outer edge of the opening of the handle sleeve, and the QR code background light sheet is fixed below the QR code, and both are electrically connected to the power control module of the main control board through wires.

[0020] As a further description of the above technical solution, a photoresistor is also fixedly installed inside the main unit chassis. The photoresistor is electrically connected to the main control board through wires and is used to control the opening and closing of the LED light strip and the QR code background light sheet.

[0021] As a further description of the above technical solution, the voice module has a built-in pre-set voice chip, which is used to receive instructions from the main control board and play operation prompts related to renting and returning the camera.

[0022] As a further description of the above technical solution, a first groove is provided on each side of the first hole of the locking slide cover, and a second groove is provided on each side of the second hole of the slide bar. The first groove and the second groove correspond to each other and have the same size, and both have rounded edges.

[0023] As a further description of the above technical solution, both the locking slide cover and the main unit chassis are made of cold-rolled steel plate and coated with an anti-rust coating; the electromagnetic lock is fixed to the inside of the slide bar by a bracket, and the RFID module is electrically connected to the RFID read / write antenna through a shielded wire.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This equipment addresses the immediate needs of users without rackets, attracting a large number of users who do not bring their own rackets to rent them and play, indirectly boosting the rental income of table tennis tables in the hall.

[0026] 2. Provides convenient and efficient racket rental services for players who need rackets temporarily, eliminating the need to bring their own rackets and significantly lowering the barrier to entry for table tennis.

[0027] 3. By combining RFID tags with reading and writing antennas, the identity of the racket can be identified, and it can be determined whether the racket has been genuinely returned and whether it is the original rental racket. This effectively avoids the problem of defective rackets being returned under false pretenses and ensures the safety of racket assets in the sports hall.

[0028] 4. Automated processes enhance user experience. The entire rental and return process is automated through the linkage between the mini-program and hardware. From scanning the code, selecting and renting the item to returning it and getting the deposit back, no manual intervention is required. The sliding cover locking structure is adapted to the shape of the handle, making it easy to pick up and put down. With the help of voice prompts and lighting, the user experience is further optimized.

[0029] 5. Convenient operation and maintenance: The equipment has functions such as automatic network reconnection, real-time status feedback, and anomaly alerts, which reduces the operation and maintenance costs of the stadium and reduces the frequency of manual intervention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the intelligent table tennis racket rental cabinet of this utility model. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the overall structure of the intelligent table tennis racket rental cabinet of this utility model. Figure 2 ;

[0032] Figure 3 This is a partial structural cross-sectional view of the intelligent table tennis racket rental cabinet of this utility model;

[0033] Figure 4 This is an enlarged view of section A of the intelligent table tennis racket rental cabinet of this utility model;

[0034] Figure 5 This is a simplified circuit diagram of the intelligent table tennis racket rental cabinet of this utility model.

[0035] In the diagram: 1. Main unit chassis; 2. Handle cover; 3. Locking cover; 4. Sliding bar; 5. QR code; 6. First hole; 7. Second hole; 8. First slot; 9. Second slot; 11. Electromagnetic lock; 12. RFID tag; 13. RFID reader / writer antenna; 14. Electromagnetic lock power control interface; 15. Electromagnetic lock status feedback interface; 16. Speaker amplifier module; 17. Main control board; 18. NFC card reader module; 19. QR code backlight sheet; 20. Speaker hole; 21. Power supply and communication serial port. Detailed Implementation

[0036] To make the technical means, creative features, and objectives of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments.

[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Please see Figures 1-5 This utility model provides a technical solution: a smart table tennis racket rental cabinet, comprising:

[0040] Main hardware device: The main hardware device includes a host chassis 1. The host chassis 1 has a main control board, an electromagnetic lock, a voice module and a power module fixedly installed inside. The host chassis 1 has multiple racket handle sleeves 2 for accommodating the racket handles. The top of the host chassis 1 has multiple racket locking sliding covers 3 and sliding strips 4 that slide with the racket locking sliding covers 3. The side of the host chassis 1 has a QR code 5 for rental and return interaction. The bottom inner wall of the racket handle sleeve 2 is fixedly installed with an RFID reading and writing antenna.

[0041] Handle Sleeve 2: To fit the rectangular hollow structure of the table tennis racket handle, ensuring that the handle is stable and does not wobble after insertion, and preventing displacement when picking up or putting down the racket.

[0042] Locking slide cover 3 and slide bar 4: The locking slide cover 3 has a first hole 6 for inserting the ping-pong paddle handle, and the top of the slide bar 4 has a second hole 7 that corresponds to the first hole 6 and has a matching diameter. Both are elliptical holes. The cross-section of the first hole 6 is larger than the cross-section of the ping-pong paddle handle. The first hole 6 of the locking slide cover 3 has a first groove 8 on each side, and the second hole 7 of the slide bar 4 has a second groove 9 on each side. The first groove 8 and the second groove 9 are in corresponding positions and have the same size. Both have rounded edges, and the width of the groove is greater than the thickness of the ping-pong paddle.

[0043] To further explain, the sliding connection between the locking cover 3 and the slider 4 is achieved by setting sliding rods on both sides of the slider 4, and opening sliding grooves on both sides inside the locking cover 3. The sliding rods and sliding grooves are matched and slidably connected. For details, please refer to [reference needed]. Figure 4 .

[0044] To further explain, both the locking slide cover 3 and the main unit chassis 1 are made of cold-rolled steel plate and have an anti-rust coating on the surface, which extends the service life of the equipment.

[0045] Electromagnetic lock: Corresponds one-to-one with racket handle sleeve 2. Each device can be configured with 4 to 8 rackets, corresponding to 4 to 8 electromagnetic locks. The electromagnetic lock is fixed to the inside of the slide bar 4 by a bracket. The inside of the racket lock cover 3 is fixed with a buckle that matches the locking tongue of the electromagnetic lock. The electromagnetic lock has its own data feedback line, which is electrically connected to the main control board. It can transmit its own open or closed status to the main control board in real time to ensure that the main control board can judge the status of the lock.

[0046] To further clarify, the electromagnetic lock model is CY-012 with a top rod, where the top rod is the buckle mentioned above. Electromagnetic locks are known existing technology, so their working principle and specific structure will not be described here.

[0047] To further explain, such as Figure 1As shown, the racket is in the locked state at this time. The handle of the ping-pong paddle is inserted into the handle sleeve 4, and the racket plate is located on the outside and above the main unit casing 1. The buckle on the inside of the locking slide cover 3 is inserted into the electromagnetic lock. At this time, the first hole 6 and the second hole 7 are intersected, and the area of ​​the intersecting area is smaller than the cross-sectional area of ​​the ping-pong paddle handle, so the ping-pong paddle cannot be directly removed. When the main control board controls the electromagnetic lock to open, the locking slide cover 3 can slide on the slider 4, as shown. Figure 2 As shown, when the first hole 6 and the second hole 7 overlap, the ping-pong paddle handle can be pulled out from the handle sleeve 4.

[0048] Main control board and related modules: The main control board integrates a wireless communication module, a power control module and an RFID module. The wireless communication module is used to establish a data connection with the server. The power control module is electrically connected to the electromagnetic lock, the voice module, the power module and the RFID read / write antenna respectively. The RFID module is electrically connected to the RFID read / write antenna.

[0049] Main control chip and communication mechanism: The main control chip adopts the STMicroelectronics STM32103C8T6 microcontroller with high anti-interference capability. It connects to the Espressif ESP32 wireless communication module via serial port. After the ESP32 connects to WIFI, it establishes a connection with the cloud server through the MQTT protocol and enters the MQTT transparent transmission mode. The main control board is equipped with a network configuration button and a dual-color WIFI LED indicator. Press and hold the network configuration button for 5 seconds to enter the network configuration mode, at which time the LED flashes red. After connecting to WIFI, the LED is solid red, and after connecting to the cloud server, the LED is solid green. Communication with the server is maintained through MQTT heartbeat frames. If there is a network outage or the router restarts, and no heartbeat response frame is received from the server within a certain period of time, the device will automatically restart the WIFI and cloud platform connection process. After the network is restored, it will automatically retransmit the key data during the network outage.

[0050] RFID identification system: The RFID read / write antenna has a patch structure and is electrically connected to the RFID module through a shielded wire to reduce signal interference; the compatible RFID tags are high-frequency tags that conform to the ISO14443A protocol, and some embodiments use the 15693 protocol to improve compatibility.

[0051] To further explain, the bottom of the ping-pong paddle handle has a mounting hole, and the RFID tag is fixed in the mounting hole with epoxy resin to prevent it from falling off or being damaged during use. Before use, the electronic tag of each paddle must be written with data that matches the corresponding cabinet door number to ensure that the paddle and cabinet door can be accurately matched when renting and returning.

[0052] Voice module: Built-in pre-set voice chip, equipped with 2W power amplifier chip and speaker, used to receive commands from the main control board and play pre-set voice messages in conjunction with scenarios such as racket rental, racket return, and abnormal reminders, such as "Please take out your racket" or "Please put the racket into compartment X" to provide clear operation guidance for users.

[0053] Power supply module: The equipment adopts a low-voltage DC power supply to provide stable and safe power supply for all power-consuming modules such as the main control board, electromagnetic lock, voice module, and RFID read / write antenna, so as to avoid voltage fluctuations affecting the operation of the equipment.

[0054] Lighting Module: The main hardware device also includes a lighting module, which includes an LED light strip for illuminating the racket and a light panel for the device's QR code background. The LED light strip is fixed around the outer edge of the opening of the racket handle sleeve 2, making it convenient for users to insert or remove the racket when the light is insufficient. The QR code background light panel is fixed below the QR code 5 to improve the clarity of QR code recognition. Both are electrically connected to the power control module of the main control board through wires. A photoresistor is fixedly installed inside the main unit chassis 1 and is electrically connected to the main control board through wires. It can automatically control the opening and closing of the LED light strip and the QR code background light panel according to the ambient light intensity, and can also be flexibly set in conjunction with the timer switch function.

[0055] To further explain, such as Figure 5 As shown, the circuit diagram uses the main control board as the core to construct a control-execution-feedback closed loop. The connections and functional logic of each module are as follows:

[0056] I. Core Architecture

[0057] With the main control board as the central hub, it integrates computing, signal transmission, and power distribution functions, and connects to external electromagnetic locks, RFID identification, voice, and lighting modules. It is connected to a cloud server via a wireless communication module. All modules are powered by a unified low-voltage DC power supply, forming a circuit logic of command reception, action execution, and status feedback.

[0058] II. Circuit Connections and Functions of Each Module

[0059] Main control chip circuit: The core is an STM32103C8T6 microcontroller, with a network configuration button (press and hold for 5 seconds to trigger network configuration) and a dual-color WIFI LED. Flashing red indicates network configuration, solid red indicates WIFI connection, and solid green indicates cloud connection. It is responsible for instruction calculation and distribution.

[0060] Wireless communication circuit: The Espressif ESP32 module connects to the main control chip via a serial port and connects to the cloud via WIFI using the MQTT protocol, including heartbeat frame detection, and automatically restarts the connection after network disconnection.

[0061] The RFID module is integrated into the main control board. It is connected to the antenna at the bottom of the patch-type read / write racket handle sleeve via a shielded wire. It reads the RFID tag data inside the handle that conforms to the ISO14443A protocol, decodes it, and transmits it to the main control chip via serial port to achieve racket identification matching.

[0062] The main control board uses a MOSFET driver circuit, powered by 12V. The main control chip outputs a high level to turn on the MOSFET and control the electromagnetic lock to open. Each electromagnetic lock has a data feedback line connected to the main control chip to transmit the opening and closing status in real time to avoid misjudgment. It includes a preset voice chip, a 2W power amplifier chip and a speaker, which are connected to the main control chip via a serial port to receive instructions and play rental and return prompt sounds.

[0063] The LED light strip and QR code background light sheet are connected to the main control board power control module; the photoresistor inside the main unit is connected to the main control chip, which controls the lighting on and off according to the ambient light intensity.

[0064] It adopts a low-voltage DC power supply, with separate power supplies for each module. 12V supplies the electromagnetic lock, and 5V supplies the main control, RFID, voice and lighting. It includes overcurrent protection to prevent short circuit damage.

[0065] Signal flow direction

[0066] Command: Cloud → ESP32 → Main control chip → Each execution module;

[0067] Feedback: Electromagnetic lock / RFID / photoresistor → main control chip;

[0068] Power supply: Power module → Power control module → Various modules.

[0069] It should be noted that the device is also equipped with a specially developed WeChat mini-program, which is responsible for all interactive behaviors and data management. The mini-program supports the following core functions:

[0070] Users can log in via WeChat without additional registration;

[0071] Displays a list of available rackets in the current device, indicating the racket type and corresponding cabinet number, allowing users to select their own rackets;

[0072] Deposit Management: Supports WeChat Pay deposits, or determines whether to waive the deposit based on the user's WeChat credit score; if the credit score meets the requirements, the deposit can be waived directly.

[0073] Rental and return operations: Trigger rental and auction instructions, initiate return and auction requests, and simultaneously display rental duration and fee details;

[0074] Deposit refund: After a successful return of the item, the system will automatically trigger the deposit refund process, requiring no manual intervention.

[0075] Basic data synchronization: Real-time synchronization of device status, such as whether the cabinet door is available, whether the racket is in place, and rental records.

[0076] It should be noted that this utility model is a smart table tennis racket rental cabinet. When in use, press and hold the network configuration button on the main control board for 5 seconds. At this time, the dual-color WIFI LED indicator will flash red, indicating that the device has entered network configuration mode. Turn on your phone's WiFi and connect to the temporary hotspot emitted by the device. Enter the target WiFi name and password on the pop-up configuration page. After completion, the LED will turn solid red, indicating that the WiFi is connected. Once the device establishes a connection with the cloud server via the MQTT protocol, the LED will turn solid green, indicating that the network configuration is complete. If the network is disconnected, the device will automatically detect MQTT heartbeat frames. If no response is received from the server within 10 seconds... The process will restart the WiFi and cloud connection process. Once the network is restored, the rental and return data during the network outage will be automatically re-uploaded. Next, high-frequency RFID tags conforming to the ISO14443A protocol will be fixed to the mounting holes at the bottom of the ping-pong paddle handle with epoxy resin. Using a special tool, the RFID tag of each paddle will be written into the cabinet number, such as cabinet 1, cabinet 2, and so on, to ensure that the tag data corresponds one-to-one with the handle sleeve. Then, the pre-placed paddle will be inserted into the corresponding handle sleeve until the bottom of the handle contacts the RFID reading antenna. At this time, the main control board will read the tag data through the RFID module to confirm that the paddle is in place, and the device will enter standby mode.

[0077] When a racket needs to be rented, the user needs to open WeChat and scan the QR code 5 on the side of the main unit chassis for the rental and return interaction. This will take them to the accompanying WeChat mini-program. The user must authorize the mini-program to access their WeChat login information, and the system will automatically read the user's WeChat credit score. If the score meets the requirements (the default threshold can be set by the sports hall), deposit-free racket rental will be granted. If the score does not meet the requirements, a deposit must be paid via WeChat. After scanning the code and entering the mini-program, the page will automatically display a list of available rackets in the current equipment, indicating the type of each racket, the corresponding cabinet number, and the condition of the rubber. The user clicks on the desired racket and confirms the rental request. The mini-program then forwards the rental instruction to the main control board of the equipment via the cloud server. The main control board triggers the following actions:

[0078] Electromagnetic lock opening: The electromagnetic lock corresponding to the cabinet door receives the signal from the power control module, the bolt retracts, and simultaneously transmits the lock opening status back to the main control board via the data feedback line. The voice module plays a prompt: Cabinet No. 3 is unlocked, please take out the racket. If the ambient light is dim, the photoresistor inside the main unit chassis 1 detects insufficient light intensity and automatically triggers the LED light strip on the outside of the racket handle opening to light up. At the same time, the background light sheet below the QR code 5 lights up to facilitate user operation. After the user observes the LED light strip of the corresponding cabinet door lighting up, push the racket lock cover 5 and slide it along the sliding rod of the slider 4 until the first elliptical hole on the racket lock cover 5 is completely aligned with the second elliptical hole on the slider 4. Hold the racket blade with one hand and the handle with the other hand, and pull the racket vertically upward. At this time, the mini program simultaneously receives the racket retrieval success signal sent by the main control board. The page displays that the rental has taken effect and indicates the rental start time and estimated fee rules. The user can view the real-time rental duration in "My Orders" in the mini program.

[0079] When the racket needs to be returned, the user clicks "Initiate Return" in the "My Orders" section of the mini-program. The page prompts the user to insert the racket into the corresponding cabinet door. Simultaneously, the LED strip on the corresponding cabinet door lights up again, and the voice module plays: "Please insert the racket into the handle sleeve of cabinet X." After confirming the cabinet door number, the user aligns the racket handle with the opening of the corresponding handle sleeve 2 and inserts it vertically into the rectangular cavity until the bottom of the handle contacts the RFID reader antenna at the bottom of the handle sleeve 2. Then, the user manually pushes back the sliding cover 5. The RFID reader antenna reads the RFID tag data inside the handle and transmits the data to the RFID module on the main control board. After decoding, the module compares the data with the original rental cabinet door number. If the data... If the racket is matched and confirmed to be the original rental racket, the main control board triggers the electromagnetic lock, and the voice module announces successful return and deposit refund. If the data does not match, such as inserting a different racket, the voice module will announce: "Racket identity does not match, please insert the original rental racket," the LED strip will flash red, and the mini-program will prompt "Return failed, please check the racket." After confirming that the racket is in place and the electromagnetic lock is engaged, the main control board will upload a successful return signal to the cloud. The mini-program will automatically calculate the rental fee, deduct the fee from the deposit, and refund the remaining deposit to the user's WeChat wallet in real time. After the order settlement is completed, the page will display that the rental has ended and generate a consumption voucher, which users can save as a screenshot.

[0080] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A smart table tennis racket rental cabinet, characterized in that: include: The main body of the hardware device includes a host chassis (1). The host chassis (1) is fixedly installed with a main control board, an electromagnetic lock, a voice module and a power module. The host chassis (1) is provided with multiple racket handle sleeves (2) for accommodating the racket handles. The top of the host chassis (1) is provided with multiple racket locking covers (3) and slide bars (4) that slide with the racket locking covers (3). The host chassis (1) is provided with a QR code (5) for rental and return interaction on one side. The racket handle sleeve (2) is fixedly installed with an RFID reading and writing antenna on the bottom inner wall. The main control board integrates a wireless communication module, a power control module, and an RFID module. The wireless communication module is used to establish a data connection with the server. The power control module is electrically connected to the electromagnetic lock, the voice module, the power module, and the RFID read / write antenna. The RFID module is electrically connected to the RFID read / write antenna. The handle sleeve (2) is a cavity structure adapted to the handle of a ping-pong paddle. The slide bar (4) is connected to the main unit chassis (1). The lock cover (3) has a first hole (6) for inserting the handle of the ping-pong paddle. The top of the slide bar (4) has a second hole (7) that corresponds to the first hole (6) and has a matching diameter. The ping-pong paddle has a mounting hole at the bottom of the handle, and an RFID tag adapted to the RFID read / write antenna is embedded in the mounting hole. The electromagnetic lock corresponds one-to-one with the handle sleeve (2). The inner side of the lock sliding cover (3) is fixed with a buckle that matches the locking tongue of the electromagnetic lock. The electromagnetic lock is provided with a data feedback line that is electrically connected to the main control board. The data feedback line is used to transmit the opening and closing status of the electromagnetic lock to the main control board.

2. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, The handle sleeve (2) is a rectangular hollow structure adapted to the handle of a ping-pong paddle.

3. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, Both the first hole (6) and the second hole (7) are elliptical holes, and the first hole (6) and the second hole (7) have the same size.

4. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, The RFID read / write antenna is a patch-type structure, the RFID tag is a high-frequency tag conforming to the ISO14443A protocol, and the RFID tag is fixed in the mounting hole with epoxy resin adhesive.

5. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, The main body of the hardware device also includes a lighting module, which includes an LED light strip and a QR code background light sheet; the LED light strip is fixed around the outer edge of the opening of the handle sleeve (2), and the QR code background light sheet is fixed below the QR code (5), and both are electrically connected to the power control module of the main control board through wires.

6. The intelligent table tennis racket rental cabinet according to claim 5, characterized in that, The main unit chassis (1) is also equipped with a photoresistor, which is electrically connected to the main control board through wires and is used to control the opening and closing of the LED light strip and the QR code background light sheet.

7. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, The voice module has a built-in pre-set voice chip, which is used to receive instructions from the main control board and play operation prompts related to renting and returning the item.

8. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, The locking slide cover (3) has a first groove (8) on each side of the first hole (6), and the slide bar (4) has a second groove (9) on each side of the second hole (7). The first groove (8) and the second groove are corresponding and have the same size, and both have rounded edges.

9. The intelligent table tennis racket rental cabinet according to claim 1, characterized in that, The locking slide cover (3) and the main unit chassis (1) are both made of cold-rolled steel plate and are coated with anti-rust coating. The electromagnetic lock is fixed to the inside of the slide bar (4) by a bracket, and the RFID module is electrically connected to the RFID reading and writing antenna through a shielded wire.

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