Hand function low frequency therapeutic instrument

Abstract

The utility model discloses a kind of hand function low frequency therapeutic instrument, it is related to the field of treatment equipment, solve the current hand function rehabilitation treatment equipment function single, cannot flexibly adjust the problem of treatment plan.Integrated low frequency electric stimulation circuit, intermediate frequency electric stimulation circuit, electromyographic feedback circuit on the finger separation board, patient will finger naturally place in finger separation board, finger respectively inserts the gap between adjacent finger separation block, controller can according to treatment needs, through the low frequency electric stimulation circuit, intermediate frequency electric stimulation circuit generates low frequency or intermediate frequency electric stimulation signal, in addition, controller collects the electromyographic signal of patient hand muscle by electromyographic feedback circuit, controller can according to these signals real-time adjustment low frequency or intermediate frequency electric stimulation intensity and mode.For the different needs of hand function disorder patient provide comprehensive rehabilitation treatment scheme, real-time adjustment treatment parameter, avoid excessive or insufficient stimulation, ensure the accuracy and effectiveness of treatment.

Description

Technical Field

[0001] This utility model relates to the field of therapeutic equipment, and in particular to a low-frequency therapeutic device for hand function. Background Technology

[0002] Hand dysfunction is a common clinical problem, particularly prominent in post-stroke patients. The most common form of functional impairment after a stroke is the inability to straighten the fingers while they are bent. Due to lesions in one side of the central nervous system, loss of control over lower brain centers can lead to contralateral motor and sensory dysfunction. Hand dysfunction can be caused by a variety of factors, with finger spasticity and bending being relatively common.

[0003] Currently, traditional rehabilitation treatments mainly include finger separators and robotic gloves for hand rehabilitation. Finger separators are a relatively primitive treatment tool that helps patients with rehabilitation training by physically separating the fingers. However, finger separators have significant limitations; they cannot quantify the current degree of finger curvature and make it difficult to develop personalized treatment plans based on the patient's specific situation.

[0004] Pneumatic gloves are a common type of robotic glove for hand rehabilitation. They use periodic inflation and deflation to passively stretch or contract the fingers under external force. While pneumatic gloves can exercise finger muscles to some extent, they primarily target flexion and extension functions, and their therapeutic effect on lateral finger mobility is very limited.

[0005] Therefore, it is evident that solving the problem of current hand function rehabilitation equipment having limited functionality and being unable to flexibly adjust treatment plans is a technical issue that urgently needs to be addressed by those in this field. Utility Model Content

[0006] The purpose of this invention is to provide a low-frequency therapeutic device for hand function, which solves the problems of current hand function rehabilitation devices having limited functions and being unable to flexibly adjust treatment plans.

[0007] To solve the above-mentioned technical problems, this utility model provides a low-frequency hand function therapy device, including: a finger separator, a low-frequency electrical stimulation circuit, a medium-frequency electrical stimulation circuit, an electromyography feedback circuit, and a controller;

[0008] The finger-separating plate is provided with 5 finger-separating blocks, and a gap matching the human finger is formed between two adjacent finger-separating blocks; each finger-separating block has a positive electrical stimulation block and a negative electrical stimulation block on each side wall, and the polarity of the electrical stimulation blocks on the side walls in the same direction of different finger-separating blocks is the same.

[0009] The output terminals of the low-frequency electrical stimulation circuit and the medium-frequency electrical stimulation circuit are connected to each of the positive electrical stimulation blocks and the negative electrical stimulation blocks;

[0010] The controller is connected to the input terminals of the low-frequency electrical stimulation circuit and the medium-frequency electrical stimulation circuit, and controls the low-frequency electrical stimulation circuit or the medium-frequency electrical stimulation circuit to output corresponding electrical stimulation signals to the positive electrical stimulation block and the negative electrical stimulation block.

[0011] The electromyographic feedback circuit is disposed on the base plate of the finger-split plate; the controller is connected to the electromyographic feedback circuit and receives the electromyographic signals collected by the electromyographic feedback circuit so as to control the output of the low-frequency electrical stimulation circuit or the medium-frequency electrical stimulation circuit according to the electromyographic signals.

[0012] As an optional solution, the aforementioned low-frequency hand function therapy device also includes: a heating circuit and a heating pad;

[0013] The heating pad is laid flat on the bottom plate of the finger-shaped plate, and the heating pad is connected to the heating circuit;

[0014] The controller is connected to the heating circuit and controls the heating temperature and heating time of the heating circuit.

[0015] As an optional solution, the aforementioned low-frequency therapy device for hand function also includes: airbags disposed on both sides of each finger segment;

[0016] Each of the positive electrical stimulation blocks and the negative electrical stimulation blocks is disposed on the surface of the corresponding airbag;

[0017] The controller is connected to the airbag and controls the inflation and deflation of the airbag.

[0018] As an alternative, in the aforementioned low-frequency therapeutic device for hand function, the low-frequency electrical stimulation circuit includes: a boost power supply module and a pulse width frequency adjustment module;

[0019] The input terminal of the boost power supply module is connected to the power supply; the output terminal of the boost power supply module is connected to the input terminal of the pulse width frequency adjustment module; the control terminal of the pulse width frequency adjustment module is connected to the controller; the output terminal of the pulse width frequency adjustment module is connected to the positive electrical stimulation block and the negative electrical stimulation block.

[0020] The pulse width frequency adjustment module includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor;

[0021] The control terminal of the first transistor is connected to the first pulse width frequency control terminal of the controller. The first terminal of the first transistor is connected to the first terminal of the first resistor and the first terminal of the second resistor. The second terminal of the second resistor is connected to the control terminal of the second transistor. The second terminal of the first resistor and the first terminal of the second transistor are connected to the output terminal of the boost power supply module. The second terminal of the second transistor is connected to the first terminal of the first capacitor and the first terminal of the third transistor. The second terminal of the first capacitor, the second terminal of the third transistor, and the second terminal of the first transistor are grounded. The control terminal of the third transistor is connected to the first amplitude control terminal. The second terminal of the second transistor serves as the positive stimulation signal output terminal.

[0022] The control terminal of the fourth transistor is connected to the second pulse width frequency control terminal of the controller. The first terminal of the fourth transistor is connected to the first terminal of the third resistor and the first terminal of the fourth resistor. The second terminal of the fourth resistor is connected to the control terminal of the fifth transistor. The second terminal of the third resistor and the first terminal of the fifth transistor are connected to the output terminal of the boost power supply module. The second terminal of the fifth transistor is connected to the first terminal of the second capacitor and the first terminal of the sixth transistor. The second terminal of the second capacitor, the second terminal of the sixth transistor, and the second terminal of the fourth transistor are grounded. The control terminal of the sixth transistor is connected to the second amplitude control terminal. The second terminal of the fifth transistor serves as the negative stimulation signal output terminal.

[0023] As an optional solution, in the aforementioned low-frequency therapeutic device for hand function, the boost power supply module includes: a seventh transistor, an eighth transistor, a ninth transistor, a first transformer, a third capacitor, a fourth capacitor, a fifth capacitor, a fifth resistor, a first diode, and a second diode;

[0024] The control terminal of the seventh transistor is connected to the voltage control terminal of the controller, the first terminal of the seventh transistor is connected to the control terminal of the eighth transistor and the power supply, the first terminal of the eighth transistor is connected to the power supply, and the second terminal of the seventh transistor is grounded.

[0025] The first end of the primary coil of the first transformer is grounded through the third capacitor. The first end of the primary coil of the first transformer is connected to the battery voltage terminal. The second end of the primary coil of the first transformer is connected to the first end of the ninth transistor. The second end of the ninth transistor is grounded. The control terminal of the ninth transistor is connected to the first waveform control terminal of the controller.

[0026] The first end of the secondary coil of the first transformer is connected to the anode of the second diode, the cathode of the second diode is connected to the cathode of the first diode and the first end of the fourth capacitor, the anode of the first diode is connected to the second end of the eighth transistor, and the anode of the first diode is grounded through the fifth capacitor; the second end of the secondary coil of the first transformer is grounded through the fifth resistor, and the second end of the fourth capacitor is grounded; the cathode of the second diode serves as the output terminal of the boost power supply module.

[0027] As an alternative, in the aforementioned low-frequency hand function therapy device, the intermediate-frequency electrical stimulation circuit includes: an intermediate-frequency signal output module and an intermediate-frequency electrical stimulation output module;

[0028] The control terminal of the intermediate frequency signal output module is connected to the controller, the output terminal of the intermediate frequency signal output module is connected to the input terminal of the intermediate frequency electrical stimulation output module, and the output terminal of the intermediate frequency electrical stimulation output module is connected to the positive electrical stimulation block and the negative electrical stimulation block.

[0029] The intermediate frequency signal output module includes: a first amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a digital-to-analog converter chip, and a dual 4-channel analog switch chip;

[0030] The non-inverting input of the first amplifier is connected to the square wave output of the controller. The inverting input of the first amplifier is connected to the first end of the sixth resistor and the first end of the seventh resistor. The second end of the sixth resistor is grounded, and the second end of the seventh resistor is connected to the power supply. The non-inverting input of the first amplifier is connected to the first end of the ninth resistor and the output of the first amplifier through the eighth resistor. The second end of the ninth resistor is grounded. The output of the first amplifier is connected to the Y-channel input of the dual 4-channel analog switch chip. The Y common input / output of the dual 4-channel analog switch chip is connected to the A-channel reference voltage input of the digital-to-analog converter chip. The A-channel feedback voltage port of the digital-to-analog converter chip is connected to the B-channel reference voltage input. The B-channel feedback voltage port of the digital-to-analog converter chip is connected to the X-channel input of the dual 4-channel analog switch chip. The X common input / output of the dual 4-channel analog switch chip serves as the output of the intermediate frequency signal output module.

[0031] As an optional solution, in the aforementioned low-frequency hand function therapy device, the intermediate frequency electrical stimulation output module includes: a power amplifier chip, a tenth resistor, a second transformer, a sixth capacitor, an adjustable resistor, a first bidirectional diode, a second bidirectional diode, and a first connector;

[0032] The output terminal of the intermediate frequency signal output module is connected to the first terminal of the adjustable resistor, the second terminal of the adjustable resistor is grounded, the moving terminal of the adjustable resistor is connected to the first terminal of the sixth capacitor, the second terminal of the sixth capacitor is connected to the input terminal of the power amplifier chip, the positive output terminal of the power amplifier chip is connected to the first terminal of the tenth resistor, the second terminal of the tenth resistor is connected to the first terminal of the primary coil of the second transformer, the negative output terminal of the power amplifier chip is connected to the second terminal of the primary coil of the second transformer, the second terminal of the secondary coil of the second transformer is connected to the first terminal of the second bidirectional diode and the third port of the first connector, the second terminal of the second bidirectional diode is grounded, the first port of the first connector is connected to the first terminal of the first bidirectional diode, and the second terminal of the first bidirectional diode is grounded; the first terminal of the secondary coil of the second transformer serves as the positive stimulation signal output terminal, and the first terminal of the first bidirectional diode serves as the negative stimulation signal output terminal.

[0033] As an optional solution, the aforementioned low-frequency therapeutic device for hand function also includes: a current feedback circuit;

[0034] The current feedback circuit includes: a second amplifier, a third amplifier, and a fourth amplifier;

[0035] The two input terminals of the second amplifier are connected in parallel across the tenth resistor. The output terminal of the second amplifier is connected to the inverting input terminal of the fourth amplifier. The B-channel feedback voltage port of the digital-to-analog converter chip is connected to the non-inverting input terminal of the third amplifier. The inverting input terminal of the third amplifier is connected to the output terminal of the third amplifier. The output terminal of the third amplifier is connected to the non-inverting input terminal of the fourth amplifier. The output terminal of the fourth amplifier is connected to the X-channel input terminal of the dual 4-channel analog switch chip.

[0036] As an optional solution, in the aforementioned low-frequency therapeutic device for hand function, the heating circuit includes: a tenth transistor, an eleventh transistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a light-emitting diode;

[0037] The control terminal of the tenth transistor is connected to the heating control terminal of the controller. The first terminal of the tenth transistor is connected to the first terminal of the eleventh resistor and the control terminal of the eleventh transistor. The second terminal of the eleventh resistor and the first terminal of the eleventh transistor are connected to a power supply. The second terminal of the eleventh transistor is connected to the first terminal of the twelfth resistor and the first terminal of the thirteenth resistor. The second terminal of the thirteenth resistor is connected to the anode of the light-emitting diode. The cathode of the thirteenth resistor, the second terminal of the twelfth resistor, and the second terminal of the tenth transistor are grounded.

[0038] As an optional solution, the aforementioned low-frequency therapeutic device for hand function further includes: a temperature measuring circuit; the temperature measuring circuit is connected to the heating pad, and the output terminal of the temperature measuring circuit is connected to the controller;

[0039] The temperature measuring circuit includes: a fifth amplifier, a fourteenth resistor, and a seventh capacitor;

[0040] The non-inverting input terminal of the fifth amplifier is connected to the first terminal of the seventh capacitor, the first terminal of the fourteenth resistor, and the temperature sampling terminal. The second terminal of the seventh capacitor and the second terminal of the fourteenth resistor are grounded. The inverting input terminal of the fifth amplifier is connected to the output terminal of the fifth amplifier. The output terminal of the fifth amplifier is connected to the controller.

[0041] This invention provides a low-frequency hand function therapy device that integrates a low-frequency electrical stimulation circuit, a medium-frequency electrical stimulation circuit, and an electromyographic feedback circuit on a finger separator plate. The patient naturally places their fingers on the finger separator plate, inserting them into the gaps between adjacent finger blocks. The controller can generate low-frequency or medium-frequency electrical stimulation signals by controlling the low-frequency and medium-frequency electrical stimulation circuits according to treatment needs. Additionally, the controller collects electromyographic signals from the patient's hand muscles through the electromyographic feedback circuit, and can adjust the intensity and mode of the low-frequency or medium-frequency electrical stimulation in real time based on these signals. Through the synergistic effect of low-frequency and medium-frequency electrical stimulation, hand function recovery can be promoted from multiple aspects. Combined with electromyographic signal control feedback, it can provide comprehensive rehabilitation treatment plans tailored to the different needs of patients with hand dysfunction, adjusting treatment parameters in real time to avoid excessive or insufficient stimulation, ensuring the accuracy and effectiveness of treatment. Attached Figure Description

[0042] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of a low-frequency hand function therapy device provided in an embodiment of this application;

[0044] Figure 2 A schematic diagram of a finger-split plate provided in an embodiment of this application;

[0045] Figure 3 A schematic diagram of a pulse width frequency adjustment module provided in an embodiment of this application;

[0046] Figure 4 A circuit diagram of a DAC modulation circuit provided in an embodiment of this application;

[0047] Figure 5 A circuit diagram of a boost power supply module provided for an embodiment of this application;

[0048] Figure 6 A circuit diagram of an intermediate frequency signal output module provided in an embodiment of this application;

[0049] Figure 7 A circuit diagram of a mid-frequency electrical stimulation output module provided for an embodiment of this application;

[0050] Figure 8 A circuit diagram of a current feedback circuit provided in an embodiment of this application;

[0051] Figure 9 A circuit diagram of a heating circuit provided in an embodiment of this application;

[0052] Figure 10 A circuit diagram of a temperature measuring circuit provided in an embodiment of this application;

[0053] The attached diagram is labeled as follows: finger-split plate 11, low-frequency electrical stimulation circuit 12, medium-frequency electrical stimulation circuit 13, electromyographic feedback circuit 14, controller 1, positive electrical stimulation block 16, and negative electrical stimulation block 17. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0055] The core of this utility model is to provide a low-frequency therapeutic device for hand function.

[0056] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] This application provides a low-frequency hand function therapy device. Figure 1 This is a schematic diagram of a low-frequency therapeutic device for hand function provided in an embodiment of this application, as shown below. Figure 1 As shown, it includes: a finger-split plate 11, a low-frequency electrical stimulation circuit 12, a medium-frequency electrical stimulation circuit 13, an electromyographic feedback circuit 14, and a controller 15;

[0058] The finger-separating plate 11 is provided with 5 finger-separating blocks, and the gap between two adjacent finger-separating blocks is matched with the human finger; each finger-separating block has a positive electrical stimulation block 16 and a negative electrical stimulation block 17 on each side wall, and the polarity of the electrical stimulation blocks on the side walls in the same direction of different finger-separating blocks is the same.

[0059] The output terminals of the low-frequency electrical stimulation circuit 12 and the medium-frequency electrical stimulation circuit 13 are connected to each positive electrical stimulation block 16 and negative electrical stimulation block 17.

[0060] The controller 15 is connected to the input terminals of the low-frequency electrical stimulation circuit 12 and the medium-frequency electrical stimulation circuit 13, and controls the low-frequency electrical stimulation circuit 12 or the medium-frequency electrical stimulation circuit 13 to output the corresponding electrical stimulation signal to the positive electrical stimulation block 16 and the negative electrical stimulation block 17.

[0061] The electromyographic feedback circuit 14 is mounted on the base plate of the finger-split plate 11; the controller 15 is connected to the electromyographic feedback circuit 14 and receives the electromyographic signals collected by the electromyographic feedback circuit 14 so as to control the output of the low-frequency electrical stimulation circuit 12 or the medium-frequency electrical stimulation circuit 13 according to the electromyographic signals.

[0062] Figure 2 This is a schematic diagram of a finger-spreading plate 11 provided in an embodiment of this application, as shown below. Figure 2 As shown, the main function of the finger separator 11 is to provide physical separation for the patient's fingers, avoid interference between the fingers, and provide a stable contact platform for electrical stimulation.

[0063] The finger separator 11 has five finger-separating blocks, with gaps between adjacent blocks that match the human finger. This design is similar to a traditional finger separator 11, but it conforms more closely to the natural shape of the finger and can better adapt to the hand structure of different patients. In practice, an adjustable gap finger separator 11 design can be used to accommodate patients with different finger sizes, or the finger separator 11 can be made of elastic material so that it can automatically adapt to the shape of the finger.

[0064] The electrical stimulation blocks are used to transmit low-frequency or medium-frequency electrical stimulation signals to the patient's fingers, achieving neuromuscular stimulation and rehabilitation training. Each finger block has a positive electrical stimulation block 16 and a negative electrical stimulation block 17 on each side wall, and the polarity of the electrical stimulation blocks on the same side wall of different finger blocks is the same. This design ensures that the current can be evenly distributed between the fingers, avoiding current short circuits or concentration at a certain point.

[0065] A ring-shaped electrical stimulation block can be used to completely wrap around the finger to provide more even electrical stimulation. Alternatively, multiple small electrical stimulation blocks can be used, distributed at different locations on the finger, to achieve more precise stimulation.

[0066] Low-frequency electrical stimulation is mainly used for neuromuscular training to promote muscle contraction and nerve regeneration; medium-frequency electrical stimulation has analgesic effects, improves local blood circulation, and promotes inflammation resolution. The output terminals of the low-frequency and medium-frequency electrical stimulation circuits 13 are connected to each electrical stimulation block, and the controller 15 controls the corresponding circuit to output electrical stimulation signals according to the mode selected by the user. The low-frequency electrical stimulation circuit 12 outputs signals with a lower frequency (e.g., 1-120Hz), while the medium-frequency electrical stimulation circuit 13 outputs signals with a higher frequency (e.g., 2000-8000Hz).

[0067] Multi-frequency electrical stimulation circuits can be used, capable of simultaneously outputting low-frequency and mid-frequency signals to achieve a more comprehensive therapeutic effect. Alternatively, programmable electrical stimulation circuits can be used to dynamically adjust the electrical stimulation parameters based on the patient's real-time feedback.

[0068] The electromyography (EMG) feedback circuit 14 is used to collect EMG signals from the patient's hand muscles in real time. The controller 15 dynamically adjusts the intensity and mode of electrical stimulation based on these signals to achieve personalized treatment plans. The EMG feedback circuit 14 is mounted on the base plate of the finger separator 11, and contacts the patient's hand skin through electrodes to collect EMG signals and transmit them to the controller 15. The controller 15 automatically adjusts the output of the electrical stimulation circuit based on the intensity and changes in the EMG signals. Specifically, a wireless EMG sensor can be used, avoiding the inconvenience of wired connections and improving patient comfort. Alternatively, it can be combined with other collected physiological signals (such as heart rate and blood oxygenation) for comprehensive feedback adjustment.

[0069] Electromyography (EMG) feedback can dynamically adjust electrical stimulation parameters based on the real-time responses of the patient's hand muscles, enabling personalized treatment plans and improving the safety and effectiveness of treatment. If the patient experiences muscle fatigue during treatment, the EMG signal will show a decrease in intensity. The controller 15 can then reduce the intensity of electrical stimulation based on this signal to avoid overstimulation.

[0070] The controller 15 is responsible for controlling the operating status of the low-frequency electrical stimulation circuit 12, the medium-frequency electrical stimulation circuit 13, and the electromyographic feedback circuit 14, thereby realizing an intelligent treatment process. In addition, the controller 15 connects to the human-machine interface via a serial port, receives user input commands, and controls the operation of each circuit module according to the commands. Simultaneously, the controller 15 receives signals from the electromyographic feedback circuit 14 and dynamically adjusts the electrical stimulation parameters.

[0071] The electrical stimulation block is connected to the output terminals of the low-frequency electrical stimulation circuit 12 and the medium-frequency electrical stimulation circuit 13 via wires. This connection method ensures that the electrical stimulation signal can be accurately transmitted to the patient's finger, realizing neuromuscular stimulation and rehabilitation training.

[0072] Alternatively, optocoupler isolation can be used to isolate the connection between the controller 15 and the electrical stimulation circuit, thereby improving the system's anti-interference capability and safety.

[0073] The hand function low-frequency therapy device provided in this application integrates a low-frequency electrical stimulation circuit 12, a medium-frequency electrical stimulation circuit 13, and an electromyographic feedback circuit 14 on the finger separator 11. The patient naturally places their fingers on the finger separator 11, inserting them into the gaps between adjacent finger blocks. The controller 15 can generate low-frequency or medium-frequency electrical stimulation signals by controlling the low-frequency electrical stimulation circuit 12 and the medium-frequency electrical stimulation circuit 13 according to treatment needs. Additionally, the controller 15 collects electromyographic signals from the patient's hand muscles through the electromyographic feedback circuit 14, and can adjust the intensity and mode of the low-frequency or medium-frequency electrical stimulation in real time based on these signals. Through the synergistic effect of low-frequency and medium-frequency electrical stimulation, the recovery of hand function can be promoted from multiple aspects. Combined with electromyographic signals to achieve control feedback, it can provide comprehensive rehabilitation treatment plans for different needs of patients with hand dysfunction, adjust treatment parameters in real time, avoid excessive or insufficient stimulation, and ensure the accuracy and effectiveness of treatment.

[0074] According to the above embodiments, it further includes: a heating circuit and a heating pad;

[0075] The heating pad is laid flat on the bottom plate of the finger-shaped plate 11, and the heating pad is connected to the heating circuit;

[0076] The controller 15 is connected to the heating circuit to control the heating temperature and heating time of the heating circuit.

[0077] The main function of the heating pad is to provide warmth to the patient's hands, promote blood circulation, relieve muscle spasms, and soften scar tissue, thereby assisting electrical stimulation therapy and improving rehabilitation outcomes. The heating pad is laid flat on the base of the finger separator 11, making direct contact with the patient's palm. The heating pad is typically made of flexible material with embedded heating elements (such as heating wires or heating films) that can evenly distribute heat.

[0078] Alternatively, a water circulation heating system can be used to provide heat therapy to the hands through circulating hot water, which can provide more lasting and stable heat.

[0079] The heating circuit controls the temperature and heating time of the heating pad, ensuring the safety and effectiveness of thermotherapy. Connected to the heating pad, the circuit receives user-input heating parameters (such as target temperature and heating time) via controller 15 and monitors the actual temperature of the heating pad in real time, adjusting the heating power based on feedback. Wireless charging technology can also be used, powering the heating pad through electromagnetic induction, avoiding the inconvenience of wired connections. Alternatively, a separate temperature control module can be used, independent of the heating circuit, improving system flexibility and scalability.

[0080] The heating circuit is connected to the controller 15 via a control line. The controller 15 controls the heating power of the heating circuit through a PWM (Pulse Width Modulation) signal and simultaneously receives the temperature feedback signal from the heating pad. Based on the user-set target temperature and heating time, the controller 15 adjusts the output power of the heating circuit via the PWM signal to ensure the heating pad temperature remains stable within the set range. Simultaneously, the controller 15 monitors the actual temperature of the heating pad in real time and automatically stops heating when the temperature reaches the set value to prevent overheating.

[0081] According to the above embodiments, it further includes: airbags disposed on both sides of each finger block;

[0082] Each positive electrical stimulation block 16 and negative electrical stimulation block 17 is placed on the surface of the corresponding airbag;

[0083] The controller 15 is connected to the airbag and controls the inflation and deflation of the airbag.

[0084] The main function of the airbag is to passively stretch and relax the patient's fingers through inflation and deflation, assisting in electrical stimulation therapy and further improving finger mobility and functional recovery. The airbag is positioned on both sides of each finger segment, with positive and negative electrical stimulation blocks 16 and 17 mounted on its surface. The airbag is connected to an inflation device (such as a miniature air pump) via tubing, and its inflation and deflation are controlled by a controller 15.

[0085] Positive and negative electrical stimulation blocks 16 and 17 are positioned on the surface of the air bladder, ensuring good contact between the blocks and the fingers during inflation and deflation, while simultaneously transmitting electrical stimulation signals. This design not only achieves passive stretching of the fingers but also provides electrical stimulation during the stretching process, further promoting muscle and nerve rehabilitation. The inflation of the air bladder simulates finger extension, while the deflation simulates finger relaxation; combined with electrical stimulation, this provides a more comprehensive improvement in hand function.

[0086] In addition, the electrical stimulation block can be designed to be detachable and installed in different positions on the airbag according to different treatment needs, so as to achieve more precise stimulation.

[0087] Specifically, the airbag is connected to a miniature air pump via a tube, and the air pump is controlled by a controller 15 via a control line. The controller 15 controls the inflation and deflation of the air pump according to a preset treatment program or real-time feedback signals. The controller 15 can set the inflation and deflation cycle of the airbag according to the treatment plan, for example, inflating once every 3 seconds for 2 seconds, then deflating for 2 seconds. This periodic action can simulate the natural movement of the fingers, promoting the flexibility of the finger joints and the recovery of muscles.

[0088] The passive stretching function of the airbag can simulate the natural movement of the fingers, promoting the flexibility of the finger joints and the recovery of muscles. At the same time, the inflation and deflation of the airbag can be precisely controlled according to the treatment plan, realizing personalized treatment.

[0089] According to the above embodiment, the low-frequency electrical stimulation circuit 12 further includes: a boost power supply module and a pulse width frequency adjustment module;

[0090] The input terminal of the boost power supply module is connected to the power supply; the output terminal of the boost power supply module is connected to the input terminal of the pulse width frequency adjustment module; the control terminal of the pulse width frequency adjustment module is connected to the controller 15; the output terminal of the pulse width frequency adjustment module is connected to the positive electrical stimulation block 16 and the negative electrical stimulation block 17.

[0091] Figure 3 A schematic diagram of a pulse width frequency adjustment module provided in an embodiment of this application is shown below. Figure 3 As shown, the pulse width frequency adjustment module includes: a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a second capacitor C2.

[0092] The control terminal of the first transistor Q1 is connected to the first pulse width frequency control terminal WF_1 of the controller 15. The first terminal of the first transistor Q1 is connected to the first terminal of the first resistor R1 and the first terminal of the second resistor R2. The second terminal of the second resistor R2 is connected to the control terminal of the second transistor Q2. The second terminal of the first resistor R1 and the first terminal of the second transistor Q2 are connected to the output terminal Power_Trans_1 of the boost power supply module. The second terminal of the second transistor Q2 is connected to the first terminal of the first capacitor C1 and the first terminal of the third transistor Q3. The second terminals of the first capacitor C1, the third transistor Q3, and the first transistor Q1 are grounded. The control terminal of the third transistor Q3 is connected to the first amplitude control terminal CTRL_1. The second terminal of the second transistor Q2 serves as the positive stimulation signal output terminal.

[0093] The control terminal of the fourth transistor Q4 is connected to the second pulse width frequency control terminal WF_2 of the controller 15. The first terminal of the fourth transistor Q4 is connected to the first terminal of the third resistor R3 and the first terminal of the fourth resistor R4. The second terminal of the fourth resistor R4 is connected to the control terminal of the fifth transistor Q5. The second terminal of the third resistor R3 and the first terminal of the fifth transistor Q5 are connected to the output terminal Power_Trans_1 of the boost power supply module. The second terminal of the fifth transistor Q5 is connected to the first terminal of the second capacitor C2 and the first terminal of the sixth transistor Q6. The second terminals of the second capacitor C2, the sixth transistor Q6, and the fourth transistor Q4 are grounded. The control terminal of the sixth transistor Q6 is connected to the second amplitude control terminal CTRL_2. The second terminal of the fifth transistor Q5 serves as the negative stimulation signal output terminal.

[0094] The main function of the low-frequency electrical stimulation circuit 12 is to generate low-frequency electrical stimulation signals for neuromuscular training, promoting muscle contraction and nerve regeneration. The low-frequency electrical stimulation circuit 12 includes a boost power supply module and a pulse width frequency adjustment module. The boost power supply module provides a stable power supply, and the pulse width frequency adjustment module adjusts the pulse width and frequency of the electrical stimulation signal according to the instructions of the controller 15.

[0095] Boost power supply modules can use linear regulators, which, although less efficient, provide a more stable output voltage in low-power applications. Alternatively, switching regulators can be used, employing high-frequency switching technology to improve power conversion efficiency.

[0096] The main function of the pulse width and frequency adjustment module is to adjust the pulse width and frequency of the electrical stimulation signal according to the instructions of the controller 15 to achieve different therapeutic effects. The pulse width and frequency adjustment module consists of multiple transistors, resistors, and capacitors, forming an adjustable pulse generator. The controller 15 sends a signal through the pulse width and frequency control terminal to control the conduction and cutoff of the transistors, thereby adjusting the pulse width and frequency.

[0097] Transistor Q1, transistor Q2, and transistor Q3 form a pulse generator to generate a positive stimulation signal. Transistor Q4, transistor Q5, and transistor Q6 form a pulse generator to generate a negative stimulation signal.

[0098] The boost power supply module ensures that the pulse width frequency adjustment module can function properly, providing sufficient voltage and current to generate a stable electrical stimulation signal.

[0099] Figure 4 A circuit diagram of a DAC modulation circuit provided in an embodiment of this application is shown below. Figure 4As shown, the DAC modulation circuit includes: a sixth amplifier, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, an eighth capacitor C8, a twelfth transistor Q12, a thirteenth transistor Q13, a fourteenth transistor Q14, and a fifteenth transistor Q15.

[0100] The DAC control terminal PA5 of controller 15 is connected to the first terminal of the eighth capacitor C8 and the non-inverting input terminal of the sixth amplifier. The second terminal of the eighth capacitor C8 is grounded. The inverting input terminal of the sixth amplifier is connected to the output terminal of the sixth amplifier. The output terminal of the sixth amplifier is connected to the second terminal of the nineteenth resistor R19 and the first terminal of the twentieth resistor R20.

[0101] The first pulse width frequency control terminal WF_1 is connected to the control terminal of the twelfth transistor Q12. The second terminal of the twelfth transistor Q12 is grounded. The first terminal of the twelfth transistor Q12 is connected to the power supply VDD through the fifteenth resistor R15. The first terminal of the twelfth transistor Q12 is connected to the control terminal of the thirteenth transistor Q13 through the sixteenth resistor R16. The second terminal of the thirteenth transistor Q13 is grounded. The first terminal of the thirteenth transistor Q13 is connected to the first terminal of the nineteenth resistor R19. The first terminal of the thirteenth transistor Q13 serves as the first amplitude control terminal CTRL_1.

[0102] The second pulse width frequency control terminal WF_2 is connected to the control terminal of the fourteenth transistor Q14. The second terminal of the fourteenth transistor Q14 is grounded. The first terminal of the fourteenth transistor Q14 is connected to the power supply VDD through the seventeenth resistor R17. The first terminal of the fourteenth transistor Q14 is connected to the control terminal of the fifteenth transistor Q15 through the eighteenth resistor R18. The second terminal of the fifteenth transistor Q15 is grounded. The first terminal of the fifteenth transistor Q15 is connected to the first terminal of the twentieth resistor R20, and the first terminal of the fifteenth transistor Q15 serves as the second amplitude control terminal CTRL_2.

[0103] The DAC control terminal PA5 of controller 15 is controlled by the DAC of the microcontroller, with a range of 0-4095. Adjusting the DAC can control the output amplitude of the circuit from 0-50V on one side.

[0104] According to the above embodiments, further, Figure 5 The circuit diagram of a boost power supply module provided in this application embodiment includes: a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a first transformer T1, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a fifth resistor R5, a first diode D1, and a second diode D2.

[0105] The control terminal of the seventh transistor Q7 is connected to the voltage control terminal V-9-EN1 of the controller 15. The first terminal of the seventh transistor Q7 is connected to the control terminal and power supply of the eighth transistor Q8. The first terminal of the eighth transistor Q8 is connected to the power supply. The second terminal of the seventh transistor Q7 is grounded.

[0106] The first end of the primary coil of the first transformer T1 is grounded through the third capacitor C3. The first end of the primary coil of the first transformer T1 is connected to the battery voltage terminal Vbat_in. The second end of the primary coil of the first transformer T1 is connected to the first end of the ninth transistor Q9. The second end of the ninth transistor Q9 is grounded. The control terminal of the ninth transistor Q9 is connected to the first waveform control terminal Trans_control_1 of the controller 15.

[0107] The first terminal of the secondary coil of the first transformer T1 is connected to the anode of the second diode D2. The cathode of the second diode D2 is connected to the cathode of the first diode D1 and the first terminal of the fourth capacitor C4. The anode of the first diode D1 is connected to the second terminal of the eighth transistor Q8. The anode of the first diode D1 is grounded through the fifth capacitor C5. The second terminal of the secondary coil of the first transformer T1 is grounded through the fifth resistor R5. The second terminal of the fourth capacitor C4 is grounded. The cathode of the second diode D2 serves as the output terminal Power_Trans_1 of the boost power supply module.

[0108] The main function of the voltage power supply module is to boost the input power supply (such as a battery or DC power supply) to a voltage level suitable for the operation of the pulse width frequency adjustment module.

[0109] The seventh transistor Q7, the eighth transistor Q8, and the ninth transistor Q9 are used to control the switching action of the power supply, thereby boosting the voltage. The first transformer T1 is used to boost the voltage, converting the input voltage into a higher output voltage.

[0110] The voltage control terminal of controller 15 is connected to the control terminal of the seventh transistor Q7, and the first waveform control terminal is connected to the control terminal of the ninth transistor Q9, used to control the conduction and cutoff of the seventh transistor Q7 and the ninth transistor Q9. Controller 15 sends signals through these control terminals to control the operating state of the boost power supply module, realizing voltage boosting and power management.

[0111] The boost power supply module raises the input low voltage to a high voltage suitable for the pulse width frequency adjustment module to operate, ensuring a stable output of the electrical stimulation signal.

[0112] Controller 15, i.e., the microcontroller outputs a 500kHz waveform (Trans_control_1) to control the on / off state of the MOSFET. The microcontroller outputs a high level (V-9-EN1) to control the transistor to conduct and output 12V, which is then output as the voltage (Power_Trans_1) through the step-up transformer (T1). WF_1 and WF_2 are the positive and negative square waves output by the microcontroller, respectively, with their frequency and pulse width determined by the parameters sent to the microcontroller from the screen.

[0113] According to the above embodiments, the intermediate frequency electrical stimulation circuit 13 further includes: an intermediate frequency signal output module and an intermediate frequency electrical stimulation output module;

[0114] The control terminal of the intermediate frequency signal output module is connected to the controller 15, the output terminal of the intermediate frequency signal output module is connected to the input terminal of the intermediate frequency electrical stimulation output module, and the output terminal of the intermediate frequency electrical stimulation output module is connected to the positive electrical stimulation block 16 and the negative electrical stimulation block 17.

[0115] like Figure 6 As shown, the intermediate frequency signal output module includes: a first amplifier LM1, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a digital-to-analog converter chip U1, and a dual 4-channel analog switch chip U2.

[0116] The non-inverting input of the first amplifier LM1 is connected to the square wave output ZP_PWM of the controller 15. The inverting input of the first amplifier LM1 is connected to the first end of the sixth resistor R6 and the first end of the seventh resistor R7. The second end of the sixth resistor R6 is grounded, and the second end of the seventh resistor R7 is connected to the power supply. The non-inverting input of the first amplifier LM1 is connected to the first end of the ninth resistor R9 and the output of the first amplifier LM1 through the eighth resistor R8. The second end of the ninth resistor R9 is grounded. The output of the first amplifier LM1 is connected to the Y channel input of the dual 4-channel analog switch chip U2. The Y common input / output of the dual 4-channel analog switch chip U2 is connected to the A channel reference voltage input of the digital-to-analog converter chip U1. The A channel feedback voltage port of the digital-to-analog converter chip U1 is connected to the B channel reference voltage input. The B channel feedback voltage port of the digital-to-analog converter chip U1 is connected to the X channel input of the dual 4-channel analog switch chip U2. The X common input / output of the dual 4-channel analog switch chip U2 serves as the output of the intermediate frequency signal output module XINHAO_OUT.

[0117] The main function of the intermediate-frequency electrical stimulation circuit 13 is to generate intermediate-frequency electrical stimulation signals for analgesia, improving local blood circulation, and promoting the dissipation of inflammation. The frequency of the intermediate-frequency electrical stimulation signal is usually between 2000-8000Hz, which can effectively penetrate tissues and achieve deep therapeutic effects.

[0118] The first amplifier LM1 amplifies the square wave signal output by the controller 15, ensuring signal strength and stability. The digital-to-analog converter chip U1 converts the digital signal into an analog signal to generate an intermediate frequency electrical stimulation signal. The dual 4-channel analog switch chip U2 switches and controls the signal transmission path to ensure correct signal output.

[0119] The intermediate frequency electrical stimulation signal generated by the intermediate frequency signal output module is transmitted to the electrical stimulation block through the intermediate frequency electrical stimulation output module, and finally applied to the patient's finger to achieve intermediate frequency electrical stimulation therapy.

[0120] Although the specific form of the intermediate frequency electrical stimulation output module needs to be designed according to the electrical stimulation requirements, its basic function is to amplify the intermediate frequency signal and transmit it to the electrical stimulation block. Therefore, a variety of different designs can be used to achieve this function.

[0121] According to the above embodiments, further, Figure 7 A circuit diagram of a mid-frequency electrical stimulation output module provided in this application embodiment is provided. The mid-frequency electrical stimulation output module includes: a power amplifier chip U3, a tenth resistor R10, a second transformer T2, a sixth capacitor C6, an adjustable resistor RL1, a first bidirectional diode D3, a second bidirectional diode D4, and a first connector P1.

[0122] The output terminal XINHAO_OUT of the intermediate frequency signal output module is connected to the first terminal of the adjustable resistor RL1, the second terminal of the adjustable resistor RL1 is grounded, the moving terminal of the adjustable resistor RL1 is connected to the first terminal of the sixth capacitor C6, the second terminal of the sixth capacitor C6 is connected to the input terminal of the power amplifier chip U3, the positive output terminal of the power amplifier chip U3 is connected to the first terminal of the tenth resistor R10, the second terminal of the tenth resistor R10 is connected to the first terminal of the primary coil of the second transformer T2, the negative output terminal of the power amplifier chip U3 is connected to the second terminal of the primary coil of the second transformer T2, the second terminal of the secondary coil of the second transformer T2 is connected to the first terminal of the second bidirectional diode D4 and the third port of the first connector P1, the second terminal of the second bidirectional diode D4 is grounded, the first port of the first connector P1 is connected to the first terminal of the first bidirectional diode D3, and the second terminal of the first bidirectional diode D3 is grounded; the first terminal of the secondary coil of the second transformer T2 serves as the positive stimulation signal output terminal BA4, and the first terminal of the first bidirectional diode D3 serves as the negative stimulation signal output terminal BA3.

[0123] Power amplifier chip U3 amplifies the intermediate frequency signal, ensuring sufficient power output. Second transformer T2 further boosts the signal voltage level and isolates the circuit for safety. Adjustable resistor RL1 adjusts the signal amplitude to achieve personalized treatment plans.

[0124] A bidirectional diode is used to protect the circuit from reverse voltage damage to the power amplifier chip U3 and the transformer. The specific form of the intermediate frequency electrical stimulation output module can be designed according to different electrical stimulation requirements, such as using different power amplifier chips U3 or transformers to achieve different power outputs and voltage boosting effects.

[0125] According to the above embodiments, further, Figure 8 A circuit diagram of a current feedback circuit provided in an embodiment of this application further includes: a current feedback circuit;

[0126] The current feedback circuit includes: second amplifier LM2, third amplifier LM3, and fourth amplifier LM4;

[0127] The two input terminals of the second amplifier LM2 are connected in parallel across the tenth resistor R10 (BA1, BA2). The output terminal of the second amplifier LM2 is connected to the inverting input terminal of the fourth amplifier LM4. The B-channel feedback voltage port OUTB of the digital-to-analog converter chip U1 is connected to the non-inverting input terminal of the third amplifier LM3. The inverting input terminal of the third amplifier LM3 is connected to the output terminal of the third amplifier LM3. The output terminal of the third amplifier LM3 is connected to the non-inverting input terminal of the fourth amplifier LM4. The output terminal of the fourth amplifier LM4 is connected to the X-channel input terminal OUTS of the dual 4-channel analog switch chip U2.

[0128] The main function of the current feedback circuit is to monitor the current in the electrical stimulation output module in real time and feed the monitored current signal back to the controller 15. In this way, the controller 15 can adjust the intensity of the electrical stimulation signal according to the actual current, ensuring the safety and effectiveness of the treatment.

[0129] The second amplifier LM2 is used to sample the voltage drop across the tenth resistor R10, thereby indirectly measuring the current through the tenth resistor R10. The third amplifier LM3 is used to amplify the B-channel feedback voltage signal of the digital-to-analog converter chip U1, and the fourth amplifier LM4 is used to further amplify and process the current feedback signal to ensure the signal strength and stability.

[0130] The current feedback circuit samples and amplifies the current signal, feeding back the actual current value to the controller 15. The controller 15 dynamically adjusts the intensity of the electrical stimulation signal based on the feedback signal to ensure the safety and effectiveness of the treatment.

[0131] In electrical stimulation therapy, the intensity of the current directly affects the treatment effect and patient safety. A current feedback circuit allows for real-time monitoring of current changes, ensuring the current remains within a safe range and dynamically adjusting the intensity of the electrical stimulation signal as needed.

[0132] In scenarios requiring more comprehensive rehabilitation treatment, a current monitoring module can be added to monitor current changes in real time and provide feedback to the controller 15 for more precise current control. Alternatively, multiple current feedback circuits can be used, distributed across different treatment areas, to achieve even more accurate current monitoring.

[0133] According to the above embodiments, further, Figure 9 A circuit diagram of a heating circuit provided in an embodiment of this application is shown. The heating circuit includes: a tenth transistor Q10, an eleventh transistor Q11, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a light-emitting diode D5.

[0134] The control terminal HEAT1 of the tenth transistor Q10 is connected to the heating control terminal of the controller 15. The first terminal of the tenth transistor Q10 is connected to the first terminal of the eleventh resistor R11 and the control terminal of the eleventh transistor Q11. The second terminal of the eleventh resistor R11 and the first terminal of the eleventh transistor Q11 are connected to the power supply. The second terminal of the eleventh transistor Q11 is connected to the first terminal of the twelfth resistor R12 and the first terminal of the thirteenth resistor R13. The second terminal of the thirteenth resistor R13 is connected to the anode of the light-emitting diode D5. The cathode of the thirteenth resistor R13, the second terminal of the twelfth resistor R12, and the second terminal of the tenth transistor Q10 are grounded.

[0135] The main function of the heating circuit is to control the heating action of the heating pad according to the instructions of the controller 15, providing heat therapy to the patient's hands. Heat therapy can promote blood circulation, relieve muscle spasms, and soften scar tissue, thereby assisting electrical stimulation therapy and improving rehabilitation outcomes.

[0136] The heating circuit consists of a transistor, a resistor, and an LED (D5), forming a simple switching control circuit. The LED D5 indicates the operating status of the heating circuit, making it convenient for users and medical personnel to observe. A high-brightness LED D5 or an LED can be used instead to improve the indication effect.

[0137] The controller 15 sends a signal through the heating control terminal to control the conduction and cutoff of the tenth transistor Q10, thereby realizing the switching control of the heating circuit. When treating finger bending and spasms, the heat therapy can first soften the tissues around the fingers, so that the electrical stimulation can act more effectively on the muscles and nerves, and accelerate the recovery process.

[0138] By combining transistors and resistors, the heating circuit enables precise on / off control, ensuring that the temperature and heating time of the heating pad meet treatment requirements. Simultaneously, the LED D5 indicator function allows users and medical personnel to easily monitor the heating status, improving ease of use and safety.

[0139] In practical applications, the number of heating circuits can be set according to actual needs.

[0140] According to the above embodiments, further, Figure 10 A circuit diagram of a temperature measuring circuit provided in an embodiment of this application is included, further comprising: a temperature measuring circuit; the temperature measuring circuit is connected to a heating pad, and the output terminal of the temperature measuring circuit is connected to a controller 15;

[0141] The temperature measurement circuit includes: fifth amplifier LM5, fourteenth resistor R14, and seventh capacitor C7;

[0142] The non-inverting input terminal WD2 of the fifth amplifier LM5 is connected to the first terminal of the seventh capacitor C7, the first terminal of the fourteenth resistor R14, and the temperature sampling terminal. The second terminal of the seventh capacitor C7 and the second terminal of the fourteenth resistor R14 are grounded. The inverting input terminal of the fifth amplifier LM5 is connected to the output terminal of the fifth amplifier LM5. The output terminal AD_WD2 of the fifth amplifier LM5 is connected to the controller 15.

[0143] The main function of the temperature sensing circuit is to monitor the temperature of the heating pad in real time and convert the temperature signal into a voltage signal, which is then fed back to the controller 15. In this way, the controller 15 can adjust the working state of the heating circuit according to the actual temperature, ensuring that the temperature of the heating pad is within a safe range and avoiding overheating or underheating.

[0144] The temperature measurement circuit consists of an amplifier, resistors, and capacitors, forming a simple temperature sampling and amplification circuit. The temperature sampling terminal is connected to the temperature sensor (such as a thermistor or thermocouple) of the heating pad, which converts the temperature change into a voltage signal. This signal is then amplified and processed by the amplifier before being fed back to the controller 15.

[0145] The fifth amplifier, LM5, amplifies the voltage signal at the temperature sampling terminal, ensuring signal strength and stability. The fourteenth resistor, R14, and the seventh capacitor, C7, are used to filter and stabilize the sampling signal, ensuring the stability and accuracy of the temperature signal.

[0146] The temperature sensing circuit samples the temperature of the heating pad using a temperature sensor, converts the temperature change into a voltage signal, amplifies and processes it through a fifth amplifier LM5, and finally feeds it back to the controller 15. The controller 15 dynamically adjusts the operating state of the heating circuit based on the feedback signal to ensure that the temperature of the heating pad remains within a safe range.

[0147] If the heating pad is too hot, it may cause burns to the patient; if the temperature is too low, it may not achieve the desired therapeutic effect. Through a temperature sensing circuit, the controller 15 can monitor the temperature in real time and adjust the operating state of the heating circuit based on feedback signals to ensure the temperature remains within a safe range.

[0148] In practical applications, the number of temperature measurement circuits can be multiple, and redundancy can be achieved.

[0149] The foregoing has provided a detailed description of the low-frequency hand function therapy device provided by this utility model. The various embodiments in the specification 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 devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0150] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

Claims

1. A low-frequency therapeutic device for hand function, characterized in that, include: Finger plate (11), low-frequency electrical stimulation circuit (12), medium-frequency electrical stimulation circuit (13), electromyographic feedback circuit (14), controller (15); The finger-separating plate (11) is provided with 5 finger-separating blocks, and a gap matching the human finger is formed between two adjacent finger-separating blocks; each of the two side walls of each finger-separating block is provided with a positive electrical stimulation block (16) and a negative electrical stimulation block (17), and the polarity of the electrical stimulation blocks on the side walls of different finger-separating blocks in the same direction is the same. The output terminals of the low-frequency electrical stimulation circuit (12) and the medium-frequency electrical stimulation circuit (13) are connected to each of the positive electrical stimulation blocks (16) and the negative electrical stimulation blocks (17); The controller (15) is connected to the input terminals of the low-frequency electrical stimulation circuit (12) and the medium-frequency electrical stimulation circuit (13), and controls the low-frequency electrical stimulation circuit (12) or the medium-frequency electrical stimulation circuit (13) to output corresponding electrical stimulation signals to the positive electrical stimulation block (16) and the negative electrical stimulation block (17). The electromyographic feedback circuit (14) is disposed on the base plate of the finger-split plate (11); the controller (15) is connected to the electromyographic feedback circuit (14) and receives the electromyographic signals collected by the electromyographic feedback circuit (14) so ​​as to control the output of the low-frequency electrical stimulation circuit (12) or the medium-frequency electrical stimulation circuit (13) according to the electromyographic signals.

2. The low-frequency hand function therapy device according to claim 1, characterized in that, Also includes: Heating circuit, heating pad; The heating pad is laid flat on the bottom plate of the finger plate (11), and the heating pad is connected to the heating circuit; The controller (15) is connected to the heating circuit and controls the heating temperature and heating time of the heating circuit.

3. The low-frequency hand function therapy device according to claim 1, characterized in that, Also includes: Airbags are installed on both sides of each finger block; Each of the positive electrical stimulation blocks (16) and the negative electrical stimulation blocks (17) is disposed on the surface of the corresponding airbag; The controller (15) is connected to the airbag and controls the inflation and deflation of the airbag.

4. The low-frequency hand function therapy device according to claim 1, characterized in that, The low-frequency electrical stimulation circuit (12) includes: a boost power supply module and a pulse width frequency adjustment module; The input terminal of the boost power module is connected to the power supply; the output terminal of the boost power module is connected to the input terminal of the pulse width frequency adjustment module; the control terminal of the pulse width frequency adjustment module is connected to the controller (15); the output terminal of the pulse width frequency adjustment module is connected to the positive electrical stimulation block (16) and the negative electrical stimulation block (17). The pulse width frequency adjustment module includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor; The control terminal of the first transistor is connected to the first pulse width frequency control terminal of the controller (15). The first terminal of the first transistor is connected to the first terminal of the first resistor and the first terminal of the second resistor. The second terminal of the second resistor is connected to the control terminal of the second transistor. The second terminal of the first resistor and the first terminal of the second transistor are connected to the output terminal of the boost power supply module. The second terminal of the second transistor is connected to the first terminal of the first capacitor and the first terminal of the third transistor. The second terminal of the first capacitor, the second terminal of the third transistor, and the second terminal of the first transistor are grounded. The control terminal of the third transistor is connected to the first amplitude control terminal. The second terminal of the second transistor serves as the positive stimulation signal output terminal. The control terminal of the fourth transistor is connected to the second pulse width frequency control terminal of the controller (15). The first terminal of the fourth transistor is connected to the first terminal of the third resistor and the first terminal of the fourth resistor. The second terminal of the fourth resistor is connected to the control terminal of the fifth transistor. The second terminal of the third resistor and the first terminal of the fifth transistor are connected to the output terminal of the boost power supply module. The second terminal of the fifth transistor is connected to the first terminal of the second capacitor and the first terminal of the sixth transistor. The second terminal of the second capacitor, the second terminal of the sixth transistor, and the second terminal of the fourth transistor are grounded. The control terminal of the sixth transistor is connected to the second amplitude control terminal. The second terminal of the fifth transistor serves as the negative stimulation signal output terminal.

5. The low-frequency hand function therapy device according to claim 4, characterized in that, The boost power supply module includes: a seventh transistor, an eighth transistor, a ninth transistor, a first transformer, a third capacitor, a fourth capacitor, a fifth capacitor, a fifth resistor, a first diode, and a second diode; The control terminal of the seventh transistor is connected to the voltage control terminal of the controller (15), the first terminal of the seventh transistor is connected to the control terminal of the eighth transistor and the power supply, the first terminal of the eighth transistor is connected to the power supply, and the second terminal of the seventh transistor is grounded. The first end of the primary coil of the first transformer is grounded through the third capacitor. The first end of the primary coil of the first transformer is connected to the battery voltage terminal. The second end of the primary coil of the first transformer is connected to the first end of the ninth transistor. The second end of the ninth transistor is grounded. The control terminal of the ninth transistor is connected to the first waveform control terminal of the controller (15). The first end of the secondary coil of the first transformer is connected to the anode of the second diode, the cathode of the second diode is connected to the cathode of the first diode and the first end of the fourth capacitor, the anode of the first diode is connected to the second end of the eighth transistor, and the anode of the first diode is grounded through the fifth capacitor; the second end of the secondary coil of the first transformer is grounded through the fifth resistor, and the second end of the fourth capacitor is grounded; the cathode of the second diode serves as the output terminal of the boost power supply module.

6. The low-frequency hand function therapy device according to claim 3, characterized in that, The intermediate frequency electrical stimulation circuit (13) includes: an intermediate frequency signal output module and an intermediate frequency electrical stimulation output module; The control terminal of the intermediate frequency signal output module is connected to the controller (15), the output terminal of the intermediate frequency signal output module is connected to the input terminal of the intermediate frequency electrical stimulation output module, and the output terminal of the intermediate frequency electrical stimulation output module is connected to the positive electrical stimulation block (16) and the negative electrical stimulation block (17). The intermediate frequency signal output module includes: a first amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a digital-to-analog converter chip, and a dual 4-channel analog switch chip; The non-inverting input of the first amplifier is connected to the square wave output of the controller (15). The inverting input of the first amplifier is connected to the first end of the sixth resistor and the first end of the seventh resistor. The second end of the sixth resistor is grounded. The second end of the seventh resistor is connected to the power supply. The non-inverting input of the first amplifier is connected to the first end of the ninth resistor and the output of the first amplifier through the eighth resistor. The second end of the ninth resistor is grounded. The output of the first amplifier is connected to the Y channel input of the dual 4-channel analog switch chip. The Y common input / output of the dual 4-channel analog switch chip is connected to the A channel reference voltage input of the digital-to-analog converter chip. The A channel feedback voltage port of the digital-to-analog converter chip is connected to the B channel reference voltage input. The B channel feedback voltage port of the digital-to-analog converter chip is connected to the X channel input of the dual 4-channel analog switch chip. The X common input / output of the dual 4-channel analog switch chip serves as the output of the intermediate frequency signal output module.

7. The low-frequency therapeutic device for hand function according to claim 6, characterized in that, The intermediate frequency electrical stimulation output module includes: a power amplifier chip, a tenth resistor, a second transformer, a sixth capacitor, an adjustable resistor, a first bidirectional diode, a second bidirectional diode, and a first connector; The output terminal of the intermediate frequency signal output module is connected to the first terminal of the adjustable resistor, the second terminal of the adjustable resistor is grounded, the moving terminal of the adjustable resistor is connected to the first terminal of the sixth capacitor, the second terminal of the sixth capacitor is connected to the input terminal of the power amplifier chip, the positive output terminal of the power amplifier chip is connected to the first terminal of the tenth resistor, the second terminal of the tenth resistor is connected to the first terminal of the primary coil of the second transformer, the negative output terminal of the power amplifier chip is connected to the second terminal of the primary coil of the second transformer, the second terminal of the secondary coil of the second transformer is connected to the first terminal of the second bidirectional diode and the third port of the first connector, the second terminal of the second bidirectional diode is grounded, the first port of the first connector is connected to the first terminal of the first bidirectional diode, and the second terminal of the first bidirectional diode is grounded; the first terminal of the secondary coil of the second transformer serves as the positive stimulation signal output terminal, and the first terminal of the first bidirectional diode serves as the negative stimulation signal output terminal.

8. The low-frequency therapeutic device for hand function according to claim 7, characterized in that, Also includes: Current feedback circuit; The current feedback circuit includes: a second amplifier, a third amplifier, and a fourth amplifier; The two input terminals of the second amplifier are connected in parallel across the tenth resistor. The output terminal of the second amplifier is connected to the inverting input terminal of the fourth amplifier. The B-channel feedback voltage port of the digital-to-analog converter chip is connected to the non-inverting input terminal of the third amplifier. The inverting input terminal of the third amplifier is connected to the output terminal of the third amplifier. The output terminal of the third amplifier is connected to the non-inverting input terminal of the fourth amplifier. The output terminal of the fourth amplifier is connected to the X-channel input terminal of the dual 4-channel analog switch chip.

9. The low-frequency hand function therapy device according to claim 2, characterized in that, The heating circuit includes: a tenth transistor, an eleventh transistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a light-emitting diode; The control terminal of the tenth transistor is connected to the heating control terminal of the controller (15). The first terminal of the tenth transistor is connected to the first terminal of the eleventh resistor and the control terminal of the eleventh transistor. The second terminal of the eleventh resistor and the first terminal of the eleventh transistor are connected to the power supply. The second terminal of the eleventh transistor is connected to the first terminal of the twelfth resistor and the first terminal of the thirteenth resistor. The second terminal of the thirteenth resistor is connected to the anode of the light-emitting diode. The cathode of the thirteenth resistor, the second terminal of the twelfth resistor, and the second terminal of the tenth transistor are grounded.

10. The low-frequency therapeutic device for hand function according to claim 9, characterized in that, Also includes: Temperature measurement circuit; The temperature measuring circuit is connected to the heating pad, and the output terminal of the temperature measuring circuit is connected to the controller (15); The temperature measuring circuit includes: a fifth amplifier, a fourteenth resistor, and a seventh capacitor; The non-inverting input terminal of the fifth amplifier is connected to the first terminal of the seventh capacitor, the first terminal of the fourteenth resistor, and the temperature sampling terminal. The second terminal of the seventh capacitor and the second terminal of the fourteenth resistor are grounded. The inverting input terminal of the fifth amplifier is connected to the output terminal of the fifth amplifier. The output terminal of the fifth amplifier is connected to the controller (15).

Images