Control circuit, circuit board and exercise device

Abstract

This application discloses a control circuit, a circuit board, and a motion device. The control circuit includes: a first communication interface module, a central control module, and a second communication interface module. The central control module includes a central control chip. A first data terminal of the first communication interface module is connected to a first pin of the central control chip, and a second data terminal of the first communication interface module is connected to a second pin of the central control chip. The first and second data terminals of the first communication interface module are used for data transmission with a display control circuit. A third pin of the central control chip is connected to the first data terminal of the second communication interface module, and a fourth pin of the central control chip is connected to the second data terminal of the second communication interface module. The third and fourth data terminals of the second communication interface module are used for data transmission with a power control circuit. This solution unifies the data transmission port, can support non-standard hardware circuits, reduces development difficulty, and shortens the development cycle.

Description

Technical Field

[0001] This application relates to the field of circuit technology, and more particularly to control circuits, circuit boards, and motion devices. Background Technology

[0002] With the rapid development of intelligent control technology, intelligent control devices are increasingly integrated into people's daily lives. Among these, electric fitness equipment is widely used in home fitness, commercial fitness, and rehabilitation therapy, becoming an important tool for improving residents' physical fitness and health in modern life. Common electric fitness equipment includes treadmills, digital strength trainers, and elliptical trainers. Through motor drive, resistance adjustment, status monitoring, and intelligent control technologies, they provide users with stable, controllable, and diverse exercise options, playing a vital role in meeting daily exercise, physical training, and postural recovery needs, and are closely related to people's healthy lifestyles.

[0003] Existing electric fitness equipment includes a display and control section, a power control section, and a power execution section. The inventors discovered that the display and control section requires the integration of numerous non-standard hardware circuits, and since it is directly connected to the power control section, the development of related equipment is difficult and time-consuming, making it impossible to quickly respond to the needs of equipment expansion and upgrades. Summary of the Invention

[0004] This application provides a control circuit, circuit board, and motion device, which solves the technical problems of high development difficulty, long development cycle, and high maintenance cost of related equipment, which affect the development and upgrading of related equipment. By setting a control circuit between the display control part and the power control part, the control circuit can be connected to the display control part and the power control part respectively. This can unify the data transmission port, support non-standard hardware circuits, reduce development difficulty, shorten the development cycle, and meet the needs of rapid response equipment expansion and upgrade.

[0005] In a first aspect, embodiments of this application provide a control circuit, which includes a first communication interface module, a central control module, and a second communication interface module, wherein the central control module includes a central control chip; The first data terminal of the first communication interface module is connected to the first pin terminal of the central control chip, and the second data terminal of the first communication interface module is connected to the second pin terminal of the central control chip. The first data terminal and the second data terminal of the first communication interface module are used to transmit data with the display control circuit. The third pin of the central control chip is connected to the first data terminal of the second communication interface module, and the fourth pin of the central control chip is connected to the second data terminal of the second communication interface module. The third and fourth data terminals of the second communication interface module are used to transmit data with the power control circuit.

[0006] As described above, by setting up a control circuit between the display control section and the power control section, and connecting to the display control section and the power control section respectively, it is possible to unify the data transmission port, support non-standard hardware circuits, reduce development difficulty, shorten the development cycle, and meet the needs of rapid response equipment expansion and upgrade.

[0007] The first communication interface module includes a fast charging protocol chip and a first interface; The first pin of the fast charging protocol chip is connected to the first data terminal of the first interface, the second pin of the fast charging protocol chip is connected to the second data terminal of the first interface, the first data terminal of the first interface serves as the first data terminal of the first communication interface module, the second data terminal of the first interface serves as the second data terminal of the first communication interface module, the third pin of the fast charging protocol chip is connected to the third data terminal of the first interface, and the fourth pin of the fast charging protocol chip is connected to the fourth data terminal of the first interface. The third and fourth data terminals of the first interface are used for charging negotiation with the display control circuit.

[0008] As mentioned above, by setting up a fast charging protocol chip, the power supply requirements of different display control circuits can be adapted, improving product compatibility. Furthermore, by setting up the first interface, the interface for data transmission and power supply between the display control circuit and the display control circuit can be standardized.

[0009] The first communication interface module further includes an electrostatic discharge protection module. The fast charging protocol chip is connected to the first interface through the electrostatic discharge protection module, and the central control chip is connected to the first interface through the electrostatic discharge protection module.

[0010] As mentioned above, by setting up an electrostatic discharge (ESD) protection module, the anti-ESD capability of the interface can be improved, ensuring the product's service life and long-term operational reliability under frequent plugging and unplugging scenarios.

[0011] The second communication interface module includes a level conversion module and a second interface; The first data terminal of the level conversion module serves as the first data terminal of the second communication interface module, the second data terminal of the level conversion module serves as the second data terminal of the second communication interface module, the third data terminal of the level conversion module is connected to the first data terminal of the second interface, and the fourth data terminal of the level conversion module is connected to the second data terminal of the second interface. The first and second data terminals of the second interface are used to transmit data with the power control circuit.

[0012] As mentioned above, by setting up a level conversion module, level matching and electrical isolation between different voltage domains can be achieved. Furthermore, setting up a second interface can improve interface compatibility and adapt to different power control circuits.

[0013] The level conversion module includes a first conversion unit and a second conversion unit; The first data terminal of the first conversion unit serves as the first data terminal of the level conversion module, the second data terminal of the first conversion unit serves as the third data terminal of the level conversion module, the first data terminal of the second conversion unit serves as the second data terminal of the level conversion module, and the second data terminal of the second conversion unit serves as the fourth data terminal of the level conversion module.

[0014] As described above, the level conversion module has independent first and second conversion units, which can achieve complete isolation between transmitted and received signals, avoid signal crosstalk, and improve the maintainability and configuration flexibility of the circuit.

[0015] The central control module also includes a power conversion module; The first data terminal of the power conversion module is used to receive a first voltage input from the second communication interface module, the second data terminal of the power conversion module is used to provide a second voltage, and the third data terminal of the power conversion module is used to provide a third voltage. The second voltage is less than the first voltage, and the third voltage is less than the first voltage.

[0016] As mentioned above, by setting up a power conversion module, two-stage voltage conversion can be achieved to adapt to the power supply requirements of different devices.

[0017] The central control module further includes a safety lock detection unit. The first data terminal of the safety lock detection unit is connected to the fifth data terminal of the second communication interface module. The fifth data terminal of the second communication interface module is used to receive a first voltage. The second data terminal of the safety lock detection unit is connected to the fifth pin of the central control chip and is used to output a safety detection signal.

[0018] As mentioned above, by setting up a safety lock detection unit, the safety interlock status can be detected, and a safety detection signal can be fed back to the central control chip in a timely manner to ensure equipment safety.

[0019] The central control module also includes a touch button unit. The first data terminal of the touch button unit is connected to the sixth pin of the central control chip and is used to output a touch detection signal.

[0020] As described above, by setting up a touch button unit, touch detection signals can be fed back to the central control chip in a timely manner, and it is deployed in the control circuit without the need for additional configuration of the display control circuit.

[0021] Secondly, embodiments of this application provide a circuit board that includes the control circuitry of any one of the first aspects.

[0022] Thirdly, embodiments of this application provide a sports device, which includes a display and control screen, a power control component, and a control circuit of any one of the first aspects. The display control circuit and the control circuit in the display and control screen transmit data through the first data terminal and the second data terminal of the first communication interface module, and the power control circuit and the control circuit in the power control component transmit data through the third data terminal and the fourth data terminal of the second communication interface module. Attached Figure Description

[0023] Figure 1 A circuit diagram of a control circuit provided in an embodiment of this application.

[0024] Figure 2 A circuit diagram of a first communication interface module provided in an embodiment of this application.

[0025] Figure 3 A circuit diagram of a second communication interface module provided in an embodiment of this application.

[0026] Figure 4 This is a circuit diagram of a power conversion module provided in an embodiment of this application.

[0027] Figure 5 A circuit diagram of a central control module provided in an embodiment of this application. Detailed Implementation

[0028] The following description and accompanying drawings fully illustrate specific embodiments of this application to enable those skilled in the art to practice them. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of embodiments of this application includes the entire scope of the claims and all available equivalents of the claims. In this document, each embodiment may be referred to individually or collectively by the term "invention," which is merely for convenience and is not intended to automatically limit the scope of the application to any single invention or inventive concept if more than one invention is disclosed. Relational terms such as "first" and "second" are used herein only to distinguish one entity or operation from another, without requiring or implying any actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed. The various embodiments in this document are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the structures, products, etc., disclosed in the embodiments, since they correspond to the disclosed parts, the descriptions are relatively simple; relevant details can be found in the method section.

[0029] Existing electric fitness equipment includes a display control section, a power control section, and a power execution section. During the development of related products, the inventors discovered that developing the display control section requires not only developing the hardware circuitry for the control instrument but also verifying the compatibility of the hardware interface with the connected power control section. This significantly increases the difficulty and time required for product development. Furthermore, software development also faces the challenge of debugging and matching controllers with various protocols, leading to high development costs and difficulties in subsequent maintenance.

[0030] In response to the aforementioned technical problems and through in-depth analysis of the underlying causes, the inventors proposed a control circuit, circuit board, and motion device. By setting up a control circuit located between the display control section and the power control section, and connecting to the display control section and the power control section respectively, it can unify the data transmission port, support non-standard hardware circuits, reduce development difficulty, shorten the development cycle, and meet the needs of rapid response equipment expansion and upgrades.

[0031] Please refer to Figure 1 This is a circuit diagram of a control circuit provided in an embodiment of this application, such as... Figure 1As shown, the control circuit includes a first communication interface module 101, a central control module 102, and a second communication interface module 103. The central control module 102 includes a central control chip 1021. The first data terminal of the first communication interface module 101 is connected to the first pin terminal of the central control chip 1021, and the second data terminal of the first communication interface module 101 is connected to the second pin terminal of the central control chip 1021. The first and second data terminals of the first communication interface module 101 are used to transmit data with the display control circuit 104. The third pin terminal of the central control chip 1021 is connected to the first data terminal of the second communication interface module 103, and the fourth pin terminal of the central control chip 1021 is connected to the second data terminal of the second communication interface module 103. The third and fourth data terminals of the second communication interface module 103 are used to transmit data with the power control circuit 105.

[0032] The first communication interface module can be a front-end communication interface for the display control circuit, handling bidirectional data transmission between the upper control and the central control chip, and serving as the physical and protocol interface between the display control section and the control circuit. The central control module can be the core logic unit of the control circuit, centered on the central control chip. Non-standard hardware circuits originally located in the upper control device (e.g., button input, fan control, safety lock switch control, and detection circuits) can be transferred to the control circuit as supporting functional circuits for the central control chip. The second communication interface module can be a back-end communication interface for the power control circuit, handling bidirectional data transmission between the central control chip and the lower control, and serving as the interface between the control circuit and the power control section. The first and second data terminals can serve as the two ends of bidirectional data transmission between the display control circuit and the central control chip, for example, the two ends of differential signal transmission. Specifically, they can be connected to the display control circuit through a USB interface or other physical interfaces; this application does not limit the specific connection. The third and fourth data terminals can serve as the two ends for bidirectional data transmission between the power control circuit and the central control chip, for example, the two ends for bidirectional serial communication of sending and receiving. Specifically, they can be connected to the display control circuit through a USB interface or other physical interface, which is not limited in this application.

[0033] As described above, by setting up a control circuit between the display control section and the power control section, and connecting to the display control section and the power control section respectively, it is possible to unify the data transmission port, support non-standard hardware circuits, reduce development difficulty, shorten the development cycle, and meet the needs of rapid response equipment expansion and upgrade.

[0034] In one embodiment, Figure 2 This application provides a circuit diagram of a first communication interface module 101, which includes a fast charging protocol chip 1011 and a first interface 1012. The first pin of the fast charging protocol chip 1011 (…) Figure 2 The example shown is the DM pin of the fast charging protocol chip 1011 and the first data terminal of the first interface 1012. Figure 2 In the example, the first interface 1012 (DN2 pin and DN1 pin) are connected, and the second pin of the fast charging protocol chip 1011 ( Figure 2 The example shown is the DP pin of the fast charging protocol chip 1011 and the second data terminal of the first interface 1012. Figure 2 In the example, the DP1 and DP2 pins of the first interface 1012 are connected. The first data terminal of the first interface 1012 serves as the first data terminal of the first communication interface module, the second data terminal of the first interface 1012 serves as the second data terminal of the first communication interface module, and the third pin of the fast charging protocol chip 1011 (… Figure 2 The example shown is the CC1 pin of the fast charging protocol chip 1011 and the third data terminal of the first interface 1012. Figure 2 In the example, the CC1 pin of the first interface 1012 is connected to the fourth pin of the fast charging protocol chip 1011. Figure 2 The example shown is the CC2 pin of the fast charging protocol chip 1011 and the fourth data terminal of the first interface 1012. Figure 2 In the example, the CC2 pin of the first interface 1012 is connected, and the third and fourth data terminals of the first interface 1012 are used to negotiate charging with the display control circuit.

[0035] The fast charging protocol chip can be a chip integrating mainstream fast charging protocol stacks such as USB PD3.0, QC, or FCP, responsible for charging protocol negotiation, voltage conversion, output control, and protection. The first interface can be a female connector (e.g., a Type-C interface), which is the only physical connection interface between the display control circuit and the control circuit. (Reference) Figure 2 The transmission link for the differential signal is as follows: the first data terminal of the first interface 1012 ( Figure 2 The example in the text refers to the DN2 and DN1 pins of the first interface 1012 and the second data terminal. Figure 2 In the example, the DP1 and DP2 pins of the first interface 1012 are shown—matching resistors R25 and R26—the first pin of the fast charging protocol chip ( Figure 2 The example shown is the DM pin of the fast charging protocol chip 1011) and the second pin ( Figure 2 In the example shown, the DP pin of the fast charging protocol chip 1011 is used. This transmission link can support differential signal transmission between the display control circuit and the fast charging protocol chip. It should be noted that when the USB is plugged in correctly, the DN1 pin and DP1 pin of the first interface 1012 are used, and when the USB is plugged in reverse, the DN2 pin and DP2 pin of the first interface 1012 are used. In addition, the transmission link for negotiation data is as follows: the third data terminal of the first interface 1012 ( Figure 2 The example shown is the CC1 pin of the first interface 1012 and the fourth data terminal of the first interface 1012. Figure 2 In the example, the CC2 pin of the first interface 1012 is used as an example—matching resistors R27 and R28—the third pin of the fast charging protocol chip 1011 ( Figure 2 The example shown is the CC1 pin and the fourth pin of the fast charging protocol chip 1011. Figure 2 The example shown is the CC2 pin of the fast charging protocol chip 1011. This transmission link can support charging negotiation between the display control circuit and the fast charging protocol chip. It should be noted that the CC1 and CC2 pins of the first interface 1012 are configuration channel pins, which can detect the device insertion or removal status, identify the correct insertion direction of the interface, complete the fast charging protocol negotiation, and determine the output voltage level.

[0036] As mentioned above, by setting up a fast charging protocol chip, the power supply requirements of different display control circuits can be adapted, improving product compatibility. Furthermore, by setting up the first interface, the interface for data transmission and power supply between the display control circuit and the display control circuit can be standardized.

[0037] Optional, such as Figure 2 As shown, the fast charging protocol chip 1011 also includes an input power supply and filtering circuit. The 12V voltage provided by the power control section is input to the first terminal of the ferrite bead L1. The second terminal of the ferrite bead L2 is connected to the positive terminal of the aluminum electrolytic capacitor EC2, whose negative terminal is grounded. The second terminal of the ferrite bead L2 is also connected to the first terminal of the ceramic capacitor C15, whose second terminal is grounded. The second terminal of the ferrite bead L2 is also connected to the first terminal of the ceramic capacitor C16, whose second terminal is grounded. The second terminal of the ferrite bead L2 is also connected to the first terminal of the ceramic capacitor C17, whose second terminal is grounded. Finally, the second terminal of the ferrite bead L2 is connected to the VIN pin of the fast charging protocol chip 1011, which is the chip's input voltage pin. This input power supply and filtering circuit provides a stable 12V operating power supply to the fast charging protocol chip 1011, while suppressing Buck switching noise backflow and filtering out high and low frequency ripple from the input power supply.

[0038] Optional, such as Figure 2As shown, the fast charging protocol chip 1011 is also surrounded by a synchronous Buck step-down converter circuit. The BST pin of the fast charging protocol chip 1011 is connected to the first terminal of the ceramic capacitor C14; this BST pin is the bootstrap circuit pin. The second terminal of the ceramic capacitor C14 is connected to the first terminal of the power inductor L5. Multiple LX pins of the fast charging protocol chip 1011 are also connected to the first terminal of the power inductor L5; this LX pin is the switching node pin. The second terminal of the power inductor L5 is connected to the positive terminal of the aluminum electrolytic capacitor EC1, and the negative terminal of the aluminum electrolytic capacitor EC1 is grounded. The second terminal of the power inductor L5 is also connected to the first terminal of the ceramic capacitor C12. The second terminal of ceramic capacitor C12 is grounded, and the first terminal of ceramic capacitor C12 is also connected to the VSP pin of fast charging protocol chip 1011. This VSP pin is the positive terminal pin for output current limiting detection. The second terminal of power inductor L5 is also connected to the first terminal of resistor R14. The second terminal of resistor R14 is connected to the first terminal of ceramic capacitor C13, and the second terminal of ceramic capacitor C13 is grounded. The second terminal of resistor R14 is also connected to the first terminal of resistor R16, and the second terminal of resistor R16 is grounded. The first terminal of resistor R16 is also connected to the VOUT pin of fast charging protocol chip 1011. This VOUT pin is the output voltage feedback and output current limiting detection pin. This synchronous Buck buck converter circuit uses a Buck topology to step down the 12V input to an adjustable voltage of 3V~20V negotiated by the PD protocol, providing fast charging power to the display control circuit. It should be noted that the two VBUS pins of the first interface 1012 are connected to the VOUT pin of fast charging protocol chip 1011 to provide an adjustable voltage to the display control circuit, and the dual pins ensure stable power supply regardless of whether the circuit is plugged in or out.

[0039] Of course, other pins of the 1011 fast charging protocol chip can also be connected to matching circuit devices. Figure 2 As exemplified, this application does not limit the scope of the application. In one embodiment, such as Figure 2 As shown, the first communication interface module 101 also includes an electrostatic discharge (ESD) protection module 1013; the fast charging protocol chip 1011 is connected to the first interface 1012 via the ESD protection module 1013, and the central control chip ( Figure 2(Not shown in the image) is connected to the first interface 1012 via an electrostatic discharge (ESD) protection module 1013. The ESD protection module can be an ESD protection array composed of multi-channel bidirectional TVS transient voltage suppression diodes. Its core function is to discharge static electricity and surge pulses generated during interface insertion and removal, clamping the voltage within a safe threshold that the downstream chip can withstand, protecting the chip from high-voltage damage. Specifically, the CC1 and CC2 pins of the first interface 1012 are connected to the IN4 and IN3 pins of the ESD protection module 1013, respectively, and are output by the corresponding OUT4 and OUT3 pins of the ESD protection module 1013. The DP and DM pins of the first interface 1012 are connected to the IN2 and IN1 pins of the ESD protection module 1013, respectively, and are output by the corresponding OUT2 and OUT1 pins of the ESD protection module 1013. The G1 and G2 pins of the ESD protection module 1013 are directly grounded. During normal operation, the TVS diode is in a high-impedance state (impedance reaches megaohms), which has no impact on signal transmission. When an electrostatic surge occurs at the interface, the TVS diode breaks down and conducts within nanoseconds, quickly dissipating the high-voltage energy to GND. At the same time, it clamps the voltage on the signal line below 5V, completely preventing high voltage from damaging the sensitive pins of the fast charging protocol chip and the central control chip.

[0040] As mentioned above, by setting up an electrostatic discharge (ESD) protection module, the anti-ESD capability of the interface can be improved, ensuring the product's service life and long-term operational reliability under frequent plugging and unplugging scenarios.

[0041] In one embodiment, Figure 3 This application provides a circuit diagram of a second communication interface module 103, which includes a level conversion module 1031 and a second interface 1032. The level conversion module 1031 has a first data terminal (…). Figure 3 In the example, the D_MCU_TX terminal is used as the first data terminal of the second communication interface module, and the second data terminal of the level conversion module 1031 is used as the second data terminal. Figure 3 In the example, the D_MCU_RX terminal is used as the second data terminal of the second communication interface module, and the third data terminal of the level conversion module 1031 is used as the third data terminal. Figure 3 The example shown is the DOWN_MCU_RX terminal, which is connected to the first data terminal of the second interface 1032. Figure 3 In the example, the third terminal of the second interface 1032, and the fourth data terminal of the level conversion module 1031 ( Figure 3 The example shown is the DOWN_MCU_TX terminal, which is connected to the second data terminal of the second interface 1032. Figure 3In the example shown, the second interface 1032 is the second terminal. The first and second data terminals of the second interface 1032 are used for data transmission with the power control circuit. The level conversion module can be a bidirectional level converter, used to achieve logic level matching between different voltage domains, while also providing electrical isolation to ensure correct identification and transmission of logic signals. The second interface can be the physical connection interface between the control circuit and the power control circuit.

[0042] As mentioned above, by setting up a level conversion module, level matching and electrical isolation between different voltage domains can be achieved. Furthermore, setting up a second interface can improve interface compatibility and adapt to different power control circuits.

[0043] Optional, such as Figure 3 As shown, the level conversion module 1031 includes a first conversion unit 10311 and a second conversion unit 10312. The first data terminal of the first conversion unit 10311 serves as the first data terminal of the level conversion module, the second data terminal of the first conversion unit 10311 serves as the third data terminal of the level conversion module, and the first data terminal of the second conversion unit 10312 serves as the second data terminal of the level conversion module, and the second data terminal of the second conversion unit 10312 serves as the fourth data terminal of the level conversion module. The first conversion unit corresponds to an independent level conversion channel for the UART_TX signal, responsible for level conversion of the transmitted signal from the central control chip to the power control circuit. The second conversion unit corresponds to an independent level conversion channel for the UART_RX signal, responsible for level conversion of the received signal from the power control circuit to the central control chip. The first and second conversion units are completely isolated, with no electrical connection and no signal crosstalk, ensuring independent and synchronous transmission of bidirectional signals. In the specific implementation process, when the central control chip sends a 3.3V high level, the first conversion unit accurately converts the 3.3V high level to a 5V / 12V high level output; when the central control chip sends a low level, the first conversion unit synchronously outputs a low level, realizing zero-delay level conversion and unidirectional transmission of the transmitted signal. When the power control circuit sends a 5V / 12V high level, the second conversion unit accurately converts the 5V / 12V high level to a 3.3V high level output to the central control chip; when the power control circuit sends a low level, the second conversion unit synchronously outputs a low level, realizing zero-delay level conversion and unidirectional transmission of the received signal.

[0044] As described above, the level conversion module has independent first and second conversion units, which can achieve complete isolation between transmitted and received signals, avoid signal crosstalk, and improve the maintainability and configuration flexibility of the circuit.

[0045] Optional, such as Figure 3As shown, the internal components and connections of the first conversion unit 10311 are as follows: the first end of resistor R19 serves as the D_MCU_TX terminal; the second end of resistor R19 is connected to the first end of resistor R20, which is grounded; the first end of resistor R20 is also connected to the base of NPN transistor QB3, whose emitter is grounded; the collector of NPN transistor QB3 is connected to the first end of resistor R17, whose second end is used to connect to a 5V voltage; the collector of NPN transistor QB3 is also connected to the first end of resistor R18; the second end of resistor R18 is connected to the base of NPN transistor QB2, whose emitter is grounded; the collector of NPN transistor QB2 is connected to the first end of resistor R15, whose second end is used to connect to a 5V voltage; and the collector of NPN transistor QB2 also serves as the DOWN_MCU_RX terminal. In the specific implementation process, the level signal received by the D_MCU_TX terminal flows into the base of the NPN transistor QB3 after passing through resistor R19. When the level signal is 3.3V high level, the NPN transistor QB3 is turned on and the collector is pulled low to GND. When the level signal is low level, the NPN transistor QB3 is turned off and the collector is pulled high to 5V by pull-up resistor R17. The collector output of NPN transistor QB3 flows into the base of NPN transistor QB2 after passing through resistor R18. If NPN transistor QB3 is turned on, its collector is pulled low to GND, and the base of NPN transistor QB2 is also low, so NPN transistor QB2 is turned off. The DOWN_MCU_RX terminal is pulled up to 5V by resistor R15. If NPN transistor QB3 is turned off, its collector is pulled high to 5V, and the base of NPN transistor QB2 is also high, so NPN transistor QB2 is turned on, and the DOWN_MCU_RX terminal is pulled low to GND.

[0046] Optional, such as Figure 3As shown, the internal components and connections of the second conversion unit 10312 are as follows: the first terminal of resistor R22 serves as the D_MCU_RX terminal; the second terminal of resistor R22 is used to connect to a 3.3V voltage; the first terminal of resistor R22 is connected to the first terminal of resistor R24; the second terminal of resistor R24 ​​is connected to the collector of NPN transistor QB4; the emitter of NPN transistor QB4 is grounded; the base of NPN transistor QB4 is connected to the first terminal of resistor R29; and the second terminal of resistor R29 is connected to the first terminal of resistor R23. The second terminal of resistor R23 is used to connect to 5V. The first terminal of resistor R23 is connected to the collector of NPN transistor QB5. The emitter of NPN transistor QB5 is grounded. The base of NPN transistor QB5 is connected to the first terminal of resistor R32. The second terminal of resistor R32 is grounded. The first terminal of resistor R32 is connected to the first terminal of resistor R31. The second terminal of resistor R31 is connected to the first terminal of resistor R30. The second terminal of resistor R30 is used to connect to 5V. The first terminal of resistor R30 also serves as the DOWN_MCU_TX terminal. In the specific implementation, the level signal received by the DOWN_MCU_TX terminal flows into the base of NPN transistor QB5 after passing through resistor R31. When the level signal is 5V, NPN transistor QB5 is turned on, and its collector is pulled low to GND. When the level signal is 0V, NPN transistor QB5 is turned off, and its collector is pulled high to 5V by pull-up resistor R23. The collector output of NPN transistor QB5 flows into the base of NPN transistor QB4 after passing through resistor R29. If NPN transistor QB5 is turned on, its collector is pulled low to GND, and the base of NPN transistor QB4 is also low, so NPN transistor QB4 is turned off. The DOWN_MCU_RX terminal is pulled up to 3.3V by resistor R22. If NPN transistor QB5 is turned off, its collector is pulled high, and the base of NPN transistor QB4 is also high, so NPN transistor QB4 is turned on, and the DOWN_MCU_RX terminal is pulled low to GND.

[0047] In one embodiment, the central control module further includes a power conversion module. Figure 4 A circuit diagram of a power conversion module provided in an embodiment of this application is shown below. Figure 4 As shown, the first data terminal of the power conversion module 1022 ( Figure 4 The example shown is the first terminal of ceramic capacitor C21, used to receive signals from the second communication interface module. Figure 4 The second communication interface module is not shown in the diagram. The input voltage is exemplarily set to 12V. The second data terminal of the power conversion module 1022 (…) Figure 4 The first terminal of the ceramic capacitor C22 (exemplary in the example) is used to provide the second voltage, and the third data terminal of the power conversion module 1022 ( Figure 4The example shown is the first terminal of a ceramic capacitor C26, which is used to provide a third voltage, where the second voltage is less than the first voltage and the third voltage is less than the first voltage. Specifically, the first terminal of ceramic capacitor C21 is used to receive 12V voltage, and the second terminal of ceramic capacitor C21 is grounded. The first terminal of ceramic capacitor C21 is connected to the first terminal of ceramic capacitor C24, and the second terminal of ceramic capacitor C24 is grounded. The first terminal of ceramic capacitor C24 is also connected to the VIN pin of the three-terminal positive linear regulator U4, and the GND pin of the three-terminal positive linear regulator U4 is grounded. The OUT pin of the three-terminal positive linear regulator U4 is connected to the first terminal of ceramic capacitor C22, and the second terminal of ceramic capacitor C22 is grounded. The first terminal of ceramic capacitor C22 is also connected to the first terminal of ceramic capacitor C25, and the second terminal of ceramic capacitor C25 is grounded. The first terminal of ceramic capacitor C25 is also connected to the VI terminal of the low-dropout linear regulator U5, and the ADJ terminal of the low-dropout linear regulator U5 is grounded. The VO terminal of the low-dropout linear regulator U5 is connected to the first terminal of ceramic capacitor C23, and the second terminal of ceramic capacitor C23 is grounded. The first terminal of ceramic capacitor C23 is also connected to the first terminal of ceramic capacitor C26, and the second terminal of ceramic capacitor C26 is grounded. In the specific implementation process, the power conversion module adopts a two-stage series step-down structure. The first stage converts the 12V voltage provided by the power control circuit into a stable 5V voltage, and the second stage converts the 5V voltage into a 3.3V voltage.

[0048] As mentioned above, by setting up a power conversion module, two-stage voltage conversion can be achieved to adapt to the power supply requirements of different devices.

[0049] In one embodiment, Figure 5 A circuit diagram of a central control module provided in an embodiment of this application is shown below. Figure 5 As shown, the central control module 102 includes a central control chip 1021, wherein the first pin of the central control chip 1021 ( Figure 5 In the example, pin PA11 is connected to the first end of resistor R6, and the second end of resistor R6 is used to connect to the first data terminal of the first communication interface module (refer to the above). Figure 2 In the example, the first interface 1012 has pins DN2 and DN1, and the second pin of the central control chip 1021 ( Figure 5 In the example, pin PA12 is connected to the first terminal of resistor R5, and the second terminal of resistor R5 is used to connect to the second data terminal of the first communication interface module (refer to the above). Figure 2 In the example, the DP2 and DP1 pins of the first interface 1012 are shown, and the third pin of the central control chip 1021 is shown. Figure 5 In the example, pin PA2 is used as the D_MCU_TX terminal, and the fourth pin of the central control chip 1021 ( Figure 5 The PA3 pin is used as the D_MCU_RX pin (for example).

[0050] Optional, such as Figure 5 As shown, the central control module 102 also includes a safety lock detection unit 1023, and the first data terminal of the safety lock detection unit 1023 ( Figure 5 The example shown is the SAFE-KEY-12V terminal and the second communication interface module ( Figure 5 The fifth data terminal (not shown in the image) (refer to the above) Figure 3 In the example, the first end of the magnetic bead L2 is connected to the second end of the second interface 1032 (the second end of the magnetic bead L2 is connected to the fifth end of the second interface 1032). The fifth data terminal of the second communication interface module is used to receive the first voltage. The second data terminal of the safety lock detection unit 1023 ( Figure 5 The example shown is the SAFE_KEY_mcu terminal, which is connected to the fifth pin of the central control chip. Figure 5 The example shown is pin PB5, used to output a safety detection signal. Specifically, the first end of resistor R12 serves as the SAFE-KEY-12V terminal, the second end of resistor R12 is connected to the first end of resistor R13, the second end of resistor R13 is grounded, the first end of resistor R13 is also connected to the base of NPN transistor QB1, the emitter of NPN transistor QB1 is grounded, the collector of NPN transistor QB1 is connected to the first end of resistor R11, the second end of resistor R11 is used to input a 3.3V voltage, the first end of resistor R11 is connected to the first end of ceramic capacitor, the first end of ceramic capacitor serves as the SAFE_KEY_MCU terminal, and the second end of ceramic capacitor is grounded. In the specific implementation process, when the SAFE-KEY-12V terminal receives a 12V high level, the current flows through resistor R12 into the base of NPN transistor QB1, turning on the NPN transistor QB1. The collector of NPN transistor QB1 is pulled low to GND, and the SAFE_KEY_mcu terminal outputs a low level. The central control chip can determine that the safety lock is closed, and the equipment is allowed to operate normally. When the SAFE-KEY-12V terminal receives a 0V low level, there is no current at the base of NPN transistor QB1, so NPN transistor QB1 is cut off. The collector of NPN transistor QB1 is pulled up to 3.3V through R11, and the SAFE_KEY_mcu terminal outputs a 3.3V high level. The central control chip can determine that the safety lock is open and immediately executes the shutdown protection action.

[0051] As mentioned above, by setting up a safety lock detection unit, the safety interlock status can be detected, and a safety detection signal can be fed back to the central control chip in a timely manner to ensure equipment safety.

[0052] Optional, such as Figure 5 As shown, the central control module 102 also includes a touch button unit 1024, and the first data terminal of the touch button unit 1024 ( Figure 5 The example shown is the TOUCH-KEY terminal, which is connected to the sixth pin of the central control chip 1021. Figure 5In the example, the PA0 terminal is connected for outputting a touch detection signal. Specifically, the first terminal of ceramic capacitor C31 serves as the TOUCH-KEY terminal, the second terminal of ceramic capacitor C31 is grounded, the first terminal of ceramic capacitor C31 is connected to the first terminal of resistor R34, the second terminal of resistor R34 is connected to the fifth terminal of connector CN4, the second terminal of ceramic capacitor C31 is connected to the fourth terminal of connector CN4, the first terminal of ceramic capacitor C30 is grounded, and the second terminal of ceramic capacitor C30 is connected to the sixth terminal of connector CN4. The sixth terminal of connector CN4 is used to input a 3.3V voltage. Connector CN4 is used to connect to an external touch electrode board. In the specific implementation, the touch electrode and C31 form a fixed capacitance value, and the change in capacitance value is detected to determine whether a button has been pressed.

[0053] As described above, by setting up a touch button unit, touch detection signals can be fed back to the central control chip in a timely manner, and it is deployed in the control circuit without the need for additional configuration of the display control circuit.

[0054] Of course, the central control module can also be equipped with an active crystal oscillator circuit, a passive crystal oscillator circuit, a physical keypad interface, a programming and debugging circuit, a reset circuit, etc., but this application does not limit it.

[0055] The following comparison of the control circuit provided in this application with existing display control screen solutions from the perspectives of research and development design, manufacturing, upgrading and maintenance illustrates the beneficial effects of the control circuit provided in this application embodiment.

[0056] Firstly, from a research and development perspective, at the hardware level, existing display and control screens need to directly interface with third-party non-standard controllers and peripheral circuits of various forms. This requires rigorous verification of circuit timing and pin definitions, resulting in long hardware verification cycles and making changes virtually impossible once the solution is finalized. However, by placing the control circuit provided in this application between the display and control screen and the power control component, the display and control screen only interfaces with the control circuit through a standardized interface (e.g., Type-C interface), eliminating the need to interface with third-party non-standard controllers and peripheral circuits of various forms. This avoids hardware design mismatch issues and reduces hardware verification costs. At the software level, existing display and control screens not only need to handle communication protocol parsing for third-party non-standard controllers and the interaction logic processing of the screen's top-level UI, but also need to handle various peripheral data, leading to high software development pressure and long development cycles. By placing the control circuit provided in this application between the display and control screen and the power control component, the display and control screen only needs to focus on handling the interaction logic processing of its own top-level UI and interface protocol parsing, accelerating its secondary development progress. It only needs to handle UI interaction logic, significantly speeding up product delivery efficiency.

[0057] Secondly, from a manufacturing perspective, regarding process defect rates, existing display and control screens, due to the use of many customized circuits, have difficulty covering all functions during production testing, resulting in a defect rate exceeding 8%. However, by placing the control circuit provided in this application embodiment between the display and control screen and the power control component, the display and control screen no longer needs to carry customized circuits; instead, the customized circuits are deployed in the control circuit section. Therefore, the hardware circuit design of the display and control screen can be highly reusable, supporting mass production. The testing fixtures are simple and reusable, and the process defect rate can be controlled below 1%. Regarding inventory backlog, existing display and control screens, due to their highly customized design, require circuit redesign for each added peripheral function, leading to serious finished product inventory backlog problems. However, by placing the control circuit provided in this application embodiment between the display and control screen and the power control component, new peripheral functions can be directly implemented on the control circuit, allowing for flexible modifications and low transformation costs, thus reducing finished product inventory backlog problems.

[0058] Finally, from the perspective of upgrades and maintenance, in terms of upgrade iterations, existing display and control screens can only undergo software upgrades and iterations within a small range of similar products, and most of these are only used to fix software anomalies. However, by placing the control circuit provided in this application embodiment between the display and control screen and the power control component, products using a standardized interface consistent with the control circuit can be upgraded and iterated upon. Combined with software optimization, this provides consumers with more choices. In terms of installation and transportation, existing sports equipment is bulky, cumbersome to assemble, and costly to transport. However, by placing the control circuit provided in this application embodiment between the display and control screen and the power control component, the sports equipment can be transported using modular assembly, simplifying assembly and disassembly and reducing transportation costs.

[0059] In summary, the control circuit provided in this application embodiment is applied between the display screen and the power control component. Various peripheral circuits of different forms can be integrated into this control circuit, while simultaneously interfacing with the display screen via a standardized interface. On one hand, the display screen can overcome the limitations of customized peripheral circuits, allowing R&D teams to focus on building core competitiveness such as product content services and user experience, significantly improving R&D efficiency. On the other hand, the standardized and modular hardware design enables large-scale cost reduction on the production side and efficient and convenient operation and maintenance, comprehensively improving the operational efficiency and market responsiveness of enterprises, providing core technical support for sports equipment manufacturers to achieve cost reduction and efficiency improvement, and rapid product iteration. Furthermore, this application embodiment provides a circuit board, which includes the control circuit described in any of the foregoing embodiments.

[0060] Finally, this application provides a sports device, which includes a display and control screen, a power control component, and a control circuit described in any of the foregoing embodiments. The display control circuit and the control circuit in the display and control screen transmit data through the first and second data terminals of the first communication interface module. The power control circuit and the control circuit in the power control component transmit data through the third and fourth data terminals of the second communication interface module. It should be noted that the display and control screen can be an intelligent terminal screen integrating information display, human-computer interaction, and device control, providing functions such as real-time display, interactive control, data processing, and network communication. For example, the display and control screen can display real-time sports information, such as current sports data (time, speed, mileage, heart rate, calories, incline, resistance level, etc.), sports modes (fat loss, fat burning, interval, incline, custom programs, etc.), goal completion progress, countdown, etc. Furthermore, the display and control screen can realize human-computer interaction and device control, such as starting and stopping the device, adjusting speed, incline, resistance, and switching modes via touch.

[0061] Among them, exercise equipment can be electric fitness equipment, such as treadmills, digital strength trainers, elliptical trainers, etc.

[0062] The circuit board and motion equipment embodiments employ the control circuit described above and achieve the corresponding technical effects.

[0063] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0064] The above specific embodiments have further detailed the purpose, technical solution, and beneficial effects of this application. It should be understood that the above are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A control circuit, characterized in that, It includes a first communication interface module, a central control module, and a second communication interface module, wherein the central control module includes a central control chip; The first data terminal of the first communication interface module is connected to the first pin terminal of the central control chip, and the second data terminal of the first communication interface module is connected to the second pin terminal of the central control chip. The first data terminal and the second data terminal of the first communication interface module are used to transmit data with the display control circuit. The third pin of the central control chip is connected to the first data terminal of the second communication interface module, and the fourth pin of the central control chip is connected to the second data terminal of the second communication interface module. The third and fourth data terminals of the second communication interface module are used to transmit data with the power control circuit.

2. The control circuit according to claim 1, characterized in that, The first communication interface module includes a fast charging protocol chip and a first interface; The first pin of the fast charging protocol chip is connected to the first data terminal of the first interface, the second pin of the fast charging protocol chip is connected to the second data terminal of the first interface, the first data terminal of the first interface serves as the first data terminal of the first communication interface module, the second data terminal of the first interface serves as the second data terminal of the first communication interface module, the third pin of the fast charging protocol chip is connected to the third data terminal of the first interface, and the fourth pin of the fast charging protocol chip is connected to the fourth data terminal of the first interface. The third and fourth data terminals of the first interface are used for charging negotiation with the display control circuit.

3. The control circuit according to claim 2, characterized in that, The first communication interface module also includes an electrostatic discharge protection module; The fast charging protocol chip is connected to the first interface through the electrostatic discharge protection module, and the central control chip is connected to the first interface through the electrostatic discharge protection module.

4. The control circuit according to claim 1, characterized in that, The second communication interface module includes a level conversion module and a second interface; The first data terminal of the level conversion module serves as the first data terminal of the second communication interface module, the second data terminal of the level conversion module serves as the second data terminal of the second communication interface module, the third data terminal of the level conversion module is connected to the first data terminal of the second interface, and the fourth data terminal of the level conversion module is connected to the second data terminal of the second interface. The first and second data terminals of the second interface are used to transmit data with the power control circuit.

5. The control circuit according to claim 4, characterized in that, The level conversion module includes a first conversion unit and a second conversion unit; The first data terminal of the first conversion unit serves as the first data terminal of the level conversion module, the second data terminal of the first conversion unit serves as the third data terminal of the level conversion module, the first data terminal of the second conversion unit serves as the second data terminal of the level conversion module, and the second data terminal of the second conversion unit serves as the fourth data terminal of the level conversion module.

6. The control circuit according to claim 1, characterized in that, The central control module also includes a power conversion module; The first data terminal of the power conversion module is used to receive a first voltage input from the second communication interface module, the second data terminal of the power conversion module is used to provide a second voltage, and the third data terminal of the power conversion module is used to provide a third voltage. The second voltage is less than the first voltage, and the third voltage is less than the first voltage.

7. The control circuit according to claim 1, characterized in that, The central control module also includes a safety lock detection unit. The first data terminal of the safety lock detection unit is connected to the fifth data terminal of the second communication interface module. The fifth data terminal of the second communication interface module is used to receive a first voltage. The second data terminal of the safety lock detection unit is connected to the fifth pin of the central control chip and is used to output a safety detection signal.

8. The control circuit according to claim 1, characterized in that, The central control module also includes a touch button unit. The first data terminal of the touch button unit is connected to the sixth pin of the central control chip and is used to output a touch detection signal.

9. A circuit board, characterized in that, The control circuit includes any one of claims 1-8.

10. A sports device, characterized in that, The device includes a display control screen, a power control component, and a control circuit according to any one of claims 1-8, wherein the display control circuit in the display control screen and the control circuit transmit data through the first data terminal and the second data terminal of the first communication interface module, and the power control circuit in the power control component and the control circuit transmit data through the third data terminal and the fourth data terminal of the second communication interface module.

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