An auricular vagus nerve stimulator

Abstract

The ear vagus nerve stimulator provided by the embodiment of the present application realizes non-invasive ear vagus nerve stimulation through a modular circuit design, avoids the risks and trauma of traditional implantable surgery. The internal electrical isolation architecture and constant current output control ensure accurate and adjustable stimulation energy while providing high use safety, effectively preventing the risk of electric leakage or overload. The device has high integration and strong portability, and is matched with a magnetic electrode and an ergonomic ear hanging structure, so that the device is stable, comfortable and easy to operate, greatly improving the user compliance and daily use convenience. Finally, the present application successfully converts professional nerve regulation technology into a safe, reliable and self-operated household health management tool, providing an innovative and inclusive solution for the auxiliary treatment and daily health intervention of chronic nerve function disorders.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to an ear vagus nerve stimulator. Background Technology

[0002] The vagus nerve, the longest cranial nerve in the human body, is a crucial information pathway connecting the brain to several vital organs (such as the heart and gastrointestinal tract), playing a central role in regulating heart rate, gastrointestinal motility, inflammatory responses, and emotional states. Therefore, vagus nerve stimulation has been proven to be an effective treatment for drug-resistant epilepsy, depression, and many other diseases. The traditional mainstream technique is "invasive vagus nerve stimulation," which involves surgically implanting a pulse generator and electrodes in the neck to directly stimulate the vagus nerve trunk. While this method has proven effective, its invasive nature has always faced fundamental limitations, including high surgical risks, high costs, complex postoperative maintenance, and applicability only to severely ill patients, significantly restricting its widespread adoption and application.

[0003] To overcome the limitations of invasive therapies, the industry has attempted to develop non-invasive percutaneous vagus nerve stimulation (PVS) techniques. Stimulation of the vagus nerve branches in the ear has become a research hotspot due to the abundant nerve distribution in the auricle and ease of surface contact. However, existing non-invasive ear vagus nerve stimulation protocols still have significant problems: First, most devices are poorly designed, with fixed or narrow adjustable stimulation parameters (such as current, frequency, and waveform), failing to achieve precise and personalized treatment for different diseases and individual differences, resulting in insufficient efficacy stability; second, the safety, reliability, and durability of these devices lack rigorous industrial-grade design, for example, the circuitry lacks effective electrical isolation protection, posing potential safety risks, and portability and user-friendliness are poor; finally, existing solutions often neglect user experience, with electrodes that are unstable and uncomfortable to wear, making long-term daily use difficult. Therefore, developing a safe, reliable, precisely adjustable, portable, and easy-to-use non-invasive ear vagus nerve stimulator is of urgent clinical need and significant market value for promoting the expansion of neuromodulation technology from intensive care hospital treatment to more accessible and family-based chronic disease management. Summary of the Invention

[0004] In view of the above problems, an ear vagus nerve stimulator is proposed to overcome or at least partially solve the above problems, comprising: a stimulating device and stimulating electrodes; the stimulating device includes: a charging / battery power supply switching module, a power on / off module, a voltage conversion module, a main control module, an isolation module, a boost module, and a stimulation module; the stimulating electrodes include: electrode leads and auricular acupoint electrodes; wherein:

[0005] The charging / battery power switching module has a voltage output terminal VOUT;

[0006] The voltage input terminal of the power-on / off module is connected to the voltage output terminal VOUT of the charging / battery power supply switching module, and the voltage output terminal VCC of the power-on / off module is connected to the voltage input terminal of the voltage conversion module.

[0007] The voltage output terminal VDD of the voltage conversion module is connected to the voltage input terminal of the main control module and the voltage input terminal of the isolation module;

[0008] The pre-isolation communication terminal of the isolation module is connected to the signal communication terminal of the main control module, the post-isolation communication terminal of the isolation module is connected to the signal communication terminal of the stimulation module, and the voltage output terminal ISO_VDD of the isolation module is connected to the voltage input terminal of the boost module and the power supply voltage input terminal of the stimulation module.

[0009] The stimulation voltage input terminal of the stimulation module is connected to the voltage output terminal BOOST_OUT of the boost module;

[0010] One end of the electrode wire is provided with an electrical connector for connecting to the output end of the stimulation module, and the other end of the electrode wire is provided with a first magnetic connector. An ear structure is provided between the electrical connector and the first magnetic connector.

[0011] One end of the ear acupoint electrode is provided with a second magnetic connector that is adapted to the first magnetic connector, and the other end of the ear acupoint electrode is provided with at least two surface electrodes for attaching to the skin of the human ear.

[0012] Optionally, the charging / battery power switching module includes a battery (BAT), a power management chip (U101), diodes (D101, D102, D103), capacitors (C101, C102), an inductor (L101), resistors (R101, R102), and a field-effect transistor (Q101); wherein:

[0013] The cathodes of diodes D101 and D102 are connected to pins 3 and 4 of power management chip U101, respectively; one end of capacitor C101 is connected to pin 2 of power management chip U101, and the other end is grounded; pin 2 of power management chip U101 is connected to the charging voltage input terminal VIN; pin 5 of power management chip U101 is shorted to the charging voltage input terminal VIN; one end of capacitor C102 and the positive terminal of battery BAT are connected to pin 6 of power management chip U101, and the other end of capacitor C102 and the negative terminal of battery BAT are grounded; one end of inductor L101 is connected to pin 7 of power management chip U101 and resistor R1. One end of resistor R101 is connected to pin 8 of power management chip U101; the other end of resistor R101 is connected to the positive terminal of battery BAT; pins 1 and 9 of power management chip U101 are grounded; the drain of MOSFET Q101 is connected to the positive terminal of battery BAT, and the source of MOSFET Q101 serves as the voltage output terminal VOUT of the charging / battery power supply switching module; the gate of MOSFET Q101, one end of resistor R102, and the positive terminal of diode D103 are all connected to the charging voltage input terminal VIN; the other end of resistor R102 is grounded; the negative terminal of diode D103 is connected to the voltage output terminal VOUT of the charging / battery power supply switching module.

[0014] Optionally, the power-on / off module includes a field-effect transistor Q201, a transistor Q202, resistors R201, R202, R203, and R204, a capacitor C201, a switch SW201, a diode D201, and a diode D202; wherein:

[0015] The source of MOSFET Q201 and one end of resistor R201 are connected to the voltage output terminal VOUT of the charging / battery power supply switching module. The drain of MOSFET Q201 serves as the voltage output terminal VCC of the power-on / off module. The gate of MOSFET Q201 is connected to the other end of resistor R201 and one end of resistor R202. The other end of resistor R202 is connected to the collector of transistor Q202 and the anode of diode D201. The emitter of transistor Q202 is grounded. The base of transistor Q202 is connected to one end of resistors R203 and R204. The other end of resistor R204 is grounded. The cathode of diode D201 is connected to the cathode of diode D202, one end of capacitor C201, and one end of switch SW201. The other ends of capacitor C201 and switch SW201 are grounded.

[0016] Optionally, the voltage conversion module includes a voltage chip U301, resistors R301, R302, and R303, capacitors C301, C302, and C303, and an inductor L301; wherein:

[0017] Pins 10 and 11 of voltage chip U301 are interconnected and connected to the voltage output terminal VCC of the power-on / off module. One end of capacitor C303 is connected to the voltage output terminal VCC of the power-on / off module, and the other end is grounded. Pins 4 and 5 of voltage chip U301 are interconnected and serve as the voltage output terminal VDD of the voltage conversion module. One end of capacitor C301 is connected to the voltage output terminal VDD of the voltage conversion module, and the other end is grounded. One end of resistor R302 and one end of resistor R303 are connected to the voltage output terminal VDD of the voltage conversion module. The other end of resistor R302 is connected to one end of resistor R301 and the voltage chip. The third pin of U301; the other end of resistor R303 is connected to the fourteenth pin of voltage chip U301; the other end of resistor R301 is grounded together with the second pin of voltage chip U301; the twelfth and thirteenth pins of voltage chip U301 are interconnected and connected together with the first pin of voltage chip U301 to one end of capacitor C302, the other end of capacitor C302 is grounded; the fifteenth pin of voltage chip U301 is grounded together; the sixth and seventh pins of voltage chip U301 are connected together to one end of inductor L301, the other end of inductor L301 is connected to the eighth and ninth pins of voltage chip U301.

[0018] Optionally, the first pin of the isolation module serves as the voltage input terminal of the isolation module; the second and third pins of the isolation module constitute the communication port after isolation; the sixth and seventh pins of the isolation module constitute the communication port before isolation; and the fourth and fifth pins of the isolation module are grounded.

[0019] Optionally, the main control module includes a main control chip U501, a screen U502, buttons SW501, SW502, and SW503, a crystal oscillator X1, a crystal oscillator X2, a transistor Q501, resistors R501, R502, R503, R504, R505, R506, R507, R508, R509, R510, and R511, and capacitors C501, C502, C503, C504, C505, C506, C507, C508, C509, C510, C511, C512, C513, and C514; wherein:

[0020] Pins 1, 13, 19, 32, 41, 48, 55, 57, 58, 60, and 64 of the main control chip U501 are connected to the voltage output terminal VDD of the voltage conversion module.

[0021] One end of capacitors C502, C503, C504, C505, C506, and C507 is connected to the voltage output terminal VDD of the voltage conversion module, and the other end is grounded.

[0022] Pin 41 of the main control chip U501 is connected to one end of resistor R506, and the other end of resistor R506 is connected to the voltage output terminal VDD of the voltage conversion module.

[0023] Pin 55 of the main control chip U501 is connected to one end of resistor R505, and the other end of resistor R505 is connected to the voltage output terminal VDD of the voltage conversion module.

[0024] Pin 57 of the main control chip U501 is connected to one end of resistor R504, and the other end of resistor R504 is connected to the voltage output terminal VDD of the voltage conversion module.

[0025] Pin 58 of the main control chip U501 is connected to one end of resistor R503. The other end of resistor R503 is connected to the other end of resistor R504 and then connected to the voltage output terminal VDD of the voltage conversion module.

[0026] Pin 37 of the main control chip U501 is connected to one end of button SW501. Pin 37 of the main control chip U501 is also connected to one end of capacitor C512. Pin 37 of the main control chip U501 is also connected to one end of resistor R507. Pin 38 of the main control chip U501 is connected to one end of button SW502. Pin 38 of the main control chip U501 is also connected to one end of capacitor C513. Pin 38 of the main control chip U501 is also connected to one end of resistor R508. Pin 39 of the main control chip U501 is connected to one end of button SW503. Pin 39 of the main control chip U501 is also connected to one end of capacitor C514. Pin 39 of the main control chip U501 is also connected to one end of resistor R509.

[0027] The other ends of buttons SW501, SW502, and SW503 are all grounded; the other ends of capacitors C512, C513, and C514 are all grounded; the other ends of resistors R507, R508, and R509 are all connected to the voltage output terminal VDD of the voltage conversion module.

[0028] The base of transistor Q501 is connected to one end of resistor R510, and the other end of resistor R510 is connected to pin 15 of the main control chip U501; the collector of transistor Q501 is connected to one end of resistor R511, and the other end of resistor R511 is connected to pin 14 of screen U502; the emitter of transistor Q501 is grounded.

[0029] The fifth pin of screen U502 is connected to the twenty-fourth pin of main control chip U501, the sixth pin of screen U502 is connected to the twentieth pin of main control chip U501, the seventh pin of screen U502 is connected to the twenty-first pin of main control chip U501, the eighth pin of screen U502 is connected to the twenty-third pin of main control chip U501, and the ninth pin of screen U502 is connected to the twenty-fifth pin of main control chip U501.

[0030] Pins 10 and 13 of screen U502 are connected to the voltage output terminal VDD of the voltage conversion module, and pin 11 of screen U502 is grounded.

[0031] The first pin of crystal oscillator X1 is connected to one end of capacitor C509. The first pin of crystal oscillator X1 is also connected to the fifth pin of the main control chip U501. The third pin of crystal oscillator X1 is connected to capacitor 508. The third pin of crystal oscillator X1 is also connected to the sixth pin of the main control chip U501. The other ends of capacitors C508 and C509 are grounded. The second and fourth pins of crystal oscillator X1 are grounded.

[0032] The first pin of crystal oscillator X2 is connected to one end of capacitor C510. The first pin of crystal oscillator X2 is also connected to the fourth pin of the main control chip U501. The second pin of crystal oscillator X2 is connected to one end of capacitor 511. The second pin of crystal oscillator X2 is also connected to the third pin of the main control chip U501. The other ends of capacitors C510 and C511 are grounded.

[0033] Pins 51 and 52 of the main control chip U501 serve as the signal communication interface for the main control module;

[0034] One end of resistor R501 is connected to the voltage output terminal VDD of the voltage conversion module, and the other end is connected to one end of capacitor C501 and the seventh pin of the main control chip U501.

[0035] Pins 12, 18, 31, 47, 60, and 63 of the main control chip U501 are grounded;

[0036] Pin 60 of the main control chip U501 is connected to one end of resistor R502, and the other end of resistor R502 is grounded.

[0037] Optionally, the boost module includes a boost chip U601, an inductor L601, a diode D601, a diode D602, a resistor R601, a resistor R602, a capacitor C601, a capacitor C602, and a capacitor C603; wherein:

[0038] The first pin of the boost converter U601 is connected to one end of resistors R601 and R602; the other end of resistor R602 is grounded; the other end of resistor R601 is connected to the negative terminal of diode D602, serving as the voltage output terminal BOOST_OUT of the boost module; the positive terminal of diode D602 is connected to the third and fourth pins of the boost converter U601; the third and fourth pins of the boost converter U601 are also connected to one end of inductor L601; the other end of inductor L601 is connected to the fifth pin of the boost converter U601 and... Pin 8 is connected to the voltage output terminal ISO_VDD of the isolation module as the voltage input terminal of the boost module; one end of capacitor C603 is connected to the voltage output terminal ISO_VDD of the isolation module, and the other end is connected to pin 9 of the boost chip U601 and grounded; the negative terminal of diode D601, one end of capacitor C601, and one end of capacitor C602 are connected to the voltage output terminal BOOST_OUT of the boost module; the positive terminal of diode D601, the other end of capacitor C601, and the other end of capacitor C602 are grounded.

[0039] Optionally, the electrical connector on the electrode wire is a 2.5mm audio plug; the first magnetic connector is a circular magnetic female with a center contact.

[0040] Optionally, the second magnetic connector on the ear acupoint electrode is a circular magnetic male head with a central pin.

[0041] Optionally, the surface electrode of the ear acupuncture electrode is a metal contact electrode with a built-in adhesive.

[0042] The stimulator provided in this invention achieves non-invasive vagus nerve stimulation of the ear through a modular circuit design, avoiding the risks and trauma of traditional implantation surgery. Its internal electrical isolation architecture and constant current output control ensure precise and adjustable stimulation energy while providing high safety, effectively preventing leakage or overload risks. The device is highly integrated and portable, and with magnetic electrodes and an ergonomic ear-hook structure, it is secure and comfortable to wear, easy to operate, and greatly improves user compliance and daily convenience. Ultimately, this invention successfully transforms professional neuromodulation technology into a safe, reliable, and self-operated home health management tool, providing an innovative and accessible solution for the adjunctive treatment of chronic neurological dysfunction and daily health intervention. Attached Figure Description

[0043] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a connection diagram of an ear vagus nerve stimulator module provided in an embodiment of the present invention;

[0045] Figure 2a and Figure 2b This is a schematic diagram of a charging / battery power supply switching module provided in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of a power-on / off module provided in an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of a voltage conversion module provided in an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of an isolation module provided in an embodiment of the present invention;

[0049] Figure 6a and Figure 6b This is a schematic diagram of the main control module provided in an embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of a boost module provided in an embodiment of the present invention;

[0051] Figure 8 This is a schematic diagram of a stimulation module provided in an embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram of an electrode wire provided in an embodiment of the present invention;

[0053] Figure 10 This is a schematic diagram of an ear acupoint electrode provided in an embodiment of the present invention. Detailed Implementation

[0054] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0055] Reference Figures 1 to 10 This invention provides an ear vagus nerve stimulator, which may specifically include:

[0056] The stimulation device and stimulation electrodes are included. The stimulation device comprises: a rechargeable / battery-powered switching module, a power-on / off module, a voltage conversion module, a main control module, an isolation module, a boost module, and a stimulation module. The stimulation electrodes comprise: electrode leads and auricular electrodes.

[0057] The charging / battery power switching module has a voltage output terminal VOUT;

[0058] The voltage input terminal of the power-on / off module is connected to the voltage output terminal VOUT of the charging / battery power supply switching module, and the voltage output terminal VCC of the power-on / off module is connected to the voltage input terminal of the voltage conversion module.

[0059] The voltage output terminal VDD of the voltage conversion module is connected to the voltage input terminal of the main control module and the voltage input terminal of the isolation module;

[0060] The pre-isolation communication terminal of the isolation module is connected to the signal communication terminal of the main control module, the post-isolation communication terminal of the isolation module is connected to the signal communication terminal of the stimulation module, and the voltage output terminal ISO_VDD of the isolation module is connected to the voltage input terminal of the boost module and the power supply voltage input terminal of the stimulation module.

[0061] The stimulation voltage input terminal of the stimulation module is connected to the voltage output terminal BOOST_OUT of the boost module;

[0062] One end of the electrode wire is provided with an electrical connector for connecting to the output end of the stimulation module, and the other end of the electrode wire is provided with a first magnetic connector. An ear structure is provided between the electrical connector and the first magnetic connector.

[0063] One end of the ear acupoint electrode is provided with a second magnetic connector that is adapted to the first magnetic connector, and the other end of the ear acupoint electrode is provided with at least two surface electrodes for attaching to the skin of the human ear.

[0064] In an embodiment of the present invention, the auricular vagus nerve stimulator can be composed of two physical parts: a stimulation device and stimulation electrodes. When using the device, the user first inserts one end of the electrode wire into the corresponding stimulation output port on the stimulation device housing via its electrical connector, thus completing the physical and electrical connection. The other end of the electrode wire is equipped with a first magnetic connector, and the wire is guided to naturally conform to the contour of the auricle by the ear-hook structure 3. Subsequently, the user attaches the second magnetic connector on one end of the auricular acupoint electrode to the first magnetic connector on the electrode wire, forming a complete conductive path; the two surface electrodes at the other end of the auricular acupoint electrode are then attached to the skin of the pre-set target area, such as the concha.

[0065] Internally, once the stimulator is powered on, the charging / battery power switching module acts as the main power manager. If the stimulator is connected to an external adapter, it prioritizes using the external power supply and charging the built-in battery; if no external power supply is available, it automatically switches to battery power. This module can output a relatively stable voltage, providing power to all subsequent circuits.

[0066] The voltage output from the charging / battery power switching module can be directly supplied to the voltage input terminal of the power-on / off module. When the user presses the physical power switch button on the stimulator, the internal circuitry of the power-on / off module is triggered, outputting power from its voltage output terminal VCC, thereby turning on the main power supply of the entire device.

[0067] Furthermore, the voltage conversion module can convert the power output from the power-on / off module into a low-noise DC voltage to meet the operating requirements of the digital chip. This DC voltage can be simultaneously supplied to the voltage input terminals of the main control module and the isolation module, providing operating power to the microprocessor, memory, and other components inside the main control module, and powering the primary-side circuit of the isolation power supply inside the isolation module.

[0068] The main control module starts up after receiving DC power. Its microprocessor loads a pre-set control program and interacts with the user through a connected screen and buttons. The user can select the treatment mode and adjust parameters such as stimulation intensity and duration using the buttons. The main control module generates corresponding digital control signals based on user instructions and sends them to the pre-isolation communication terminal of the isolation module through its signal communication terminal.

[0069] The isolation module internally uses magnetic or optocoupler technology to electrically isolate the main control side (low voltage, safety side) from the stimulation side (high voltage, power side). It transmits received digital control signals across the isolation barrier from its isolated communication terminal to the signal communication terminal of the stimulation module, achieving secure transmission of control commands. Simultaneously, the isolation circuit inside the isolation module converts the DC voltage output from the voltage conversion module into an electrically isolated voltage, which is output from its voltage output terminal ISO_VDD. ISO_VDD serves two purposes: firstly, as the power supply voltage input terminal for the stimulation module, powering its internal logic and drive circuits; and secondly, as the voltage input terminal for the boost module, providing it with its energy source.

[0070] The boost module can raise the isolated safe voltage to a higher value to overcome skin resistance and provide sufficient voltage "potential energy" for effective electrical stimulation. BOOST_OUT is directly connected to the stimulation voltage input of the stimulation module. The stimulation module begins operation after receiving ISO_VDD power and control signals from the isolation module. Utilizing the high voltage provided by BOOST_OUT, the stimulation module generates and outputs constant microcurrent pulses based on the waveform, frequency, pulse width, and other parameters specified by the control signals. This current pulse flows through the device's stimulation output port, through the connected electrode leads and auricular electrodes, and ultimately acts between two surface electrodes on the skin of the ear, forming a circuit. This non-invasively stimulates the underlying vagus nerve branch, achieving the desired neuromodulation therapeutic effect. Throughout the process, the isolation module ensures that even if an abnormality occurs in the stimulation-side circuit, dangerous voltage cannot be conducted to the device casing, buttons, or main control circuit that the user may directly contact, fundamentally protecting the user's electrical safety.

[0071] Reference Figure 2a and Figure 2b In an embodiment of the present invention, the charging / battery power supply switching module includes a battery BAT, a power management chip U101, diodes D101, D102, and D103, capacitors C101 and C102, an inductor L101, resistors R101 and R102, and a field-effect transistor Q101; wherein:

[0072] The cathodes of diodes D101 and D102 are connected to pins 3 and 4 of power management chip U101, respectively; one end of capacitor C101 is connected to pin 2 of power management chip U101, and the other end is grounded; pin 2 of power management chip U101 is connected to the charging voltage input terminal VIN; pin 5 of power management chip U101 is shorted to the charging voltage input terminal VIN; one end of capacitor C102 and the positive terminal of battery BAT are connected to pin 6 of power management chip U101, and the other end of capacitor C102 and the negative terminal of battery BAT are grounded; one end of inductor L101 is connected to pin 7 of power management chip U101 and resistor R1. One end of resistor R101 is connected to pin 8 of power management chip U101; the other end of resistor R101 is connected to the positive terminal of battery BAT; pins 1 and 9 of power management chip U101 are grounded; the drain of MOSFET Q101 is connected to the positive terminal of battery BAT, and the source of MOSFET Q101 serves as the voltage output terminal VOUT of the charging / battery power supply switching module; the gate of MOSFET Q101, one end of resistor R102, and the positive terminal of diode D103 are all connected to the charging voltage input terminal VIN; the other end of resistor R102 is grounded; the negative terminal of diode D103 is connected to the voltage output terminal VOUT of the charging / battery power supply switching module.

[0073] The core function of the charging / battery power switching module is to achieve automatic and seamless switching between external power supply and built-in battery, and to provide a stable voltage output terminal VOUT for the whole machine.

[0074] The core controller of the charging / battery power switching module is the power management chip U101, which can be model HE3342EAP8. When an external power adapter is connected, its output charging voltage is introduced through the charging voltage input terminal VIN. Capacitor C101 is used to filter out high-frequency noise on the input power line and stabilize the input voltage. The second pin (connected to VIN) and the fifth pin (short-circuited to VIN) of the power management chip U101 jointly receive this input power, thereby activating the chip's charging management function. The third and fourth pins of the chip receive control signals or perform status detection through diodes D101 and D102 (both with their negative terminals connected to the chip). The diodes serve to prevent reverse current flow.

[0075] The positive terminal of battery BAT and one end of capacitor C102 are connected to pin 6 of power management chip U101, while the negative terminal of the battery is grounded. Capacitor C102 is used to smooth the voltage at the battery terminals. Power management chip U101 forms a switching charging circuit through its pins 7 and 8 and external inductor L101. Specifically, one end of inductor L101 is connected to pin 7 of the chip, and the other end is connected to pin 8. Resistor R101 is connected between inductor L101 and the positive terminal of the battery, and can be used for charging current detection or to form a feedback loop, enabling U101 to execute a constant current / constant voltage charging algorithm based on the battery state to charge battery BAT.

[0076] The power path switching is executed by a field-effect transistor (FET) Q101. Its drain is directly connected to the positive terminal of the battery BAT, and its source serves as the voltage output terminal VOUT of the entire module. Its gate control logic determines the power supply path: when an external power supply is present, VIN is high. This high level acts on the gate of Q101 through the path formed by diode D103 (which is forward-biased at this time) and resistor R102. For the FET Q101, pulling its gate high (close to the VIN voltage) will turn it off, thus cutting off the direct power supply path from the battery to VOUT. Simultaneously, the high voltage of VIN is directly delivered to VOUT through the conducting diode D103, powering the system. At this time, the module is powered by an external power supply, and the power management chip U101 independently manages battery charging in the background.

[0077] When the external power supply is disconnected, the VIN voltage drops to 0. Diode D103 is reverse-biased due to the zero anode voltage. The gate of MOSFET Q101 is pulled down to ground (GND) through resistor R102, becoming low. For MOSFET Q101, whose source is connected to the positive battery voltage, a negative voltage difference is formed between the gate and source, causing Q101 to conduct. The positive voltage of battery BAT is then output from its source to VOUT through the conducting Q101, achieving a seamless switch from battery power to system power. During this process, diode D103 acts as reverse isolation, preventing battery current from flowing back into the disconnected VIN terminal in battery-powered mode.

[0078] The first and ninth pins of the power management chip U101 are connected to ground (GND) to provide a reference potential for the chip and complete the circuit.

[0079] Reference Figure 3 In an embodiment of the present invention, the power-on / off module includes a field-effect transistor Q201, a transistor Q202, resistors R201, R202, R203, and R204, a capacitor C201, a switch SW201, a diode D201, and a diode D202; wherein:

[0080] The source of MOSFET Q201 and one end of resistor R201 are connected to the voltage output terminal VOUT of the charging / battery power supply switching module. The drain of MOSFET Q201 serves as the voltage output terminal VCC of the power-on / off module. The gate of MOSFET Q201 is connected to the other end of resistor R201 and one end of resistor R202. The other end of resistor R202 is connected to the collector of transistor Q202 and the anode of diode D201. The emitter of transistor Q202 is grounded. The base of transistor Q202 is connected to one end of resistors R203 and R204. The other end of resistor R204 is grounded. The cathode of diode D201 is connected to the cathode of diode D202, one end of capacitor C201, and one end of switch SW201. The other ends of capacitor C201 and switch SW201 are grounded.

[0081] The power-on / off module enables low-power standby and button-triggered power-on of the entire device, and allows for controlled power-off via the main control system.

[0082] When the device is powered off, the physical button SW201 is disconnected. The main control module is not powered on, its control signal terminal is in a high impedance state, and transistor Q202 is cut off because its base is grounded through resistor R204. The gate of MOSFET Q201 is pulled up to the source voltage VOUT through resistor R201, causing its gate-source voltage to approach zero and turn off. There is no output at the voltage output terminal VCC, and the entire device is in a low-power state.

[0083] When powering on, pressing SW201 closes it, creating a drive path: VOUT current flows through R201, the gate of Q201, R202, D201, and SW201 to GND. This pulls down the gate potential of Q201, creating an effective gate-source bias voltage, which then turns it on. The VOUT voltage is then transferred to VCC via Q201, starting the downstream module. Simultaneously, C201 charges rapidly, suppressing switch bounce, and D202 is connected in reverse parallel for voltage clamping protection. Releasing SW201 causes C201 to discharge slowly, working with the voltage divider between R201 and R202 to keep Q201 on, maintaining continuous VCC output. Q202 remains off due to the pull-down effect of R204, keeping the device in standby or operating mode. When powering off, pressing SW201 again causes C201 to discharge rapidly, Q201's gate bias disappears and it turns off, VCC output stops, downstream modules are powered off, and the device returns to a power-off state.

[0084] Reference Figure 4 In an embodiment of the present invention, the voltage conversion module includes a voltage chip U301, resistors R301, R302, and R303, capacitors C301, C302, and C303, and an inductor L301; wherein:

[0085] Pins 10 and 11 of voltage chip U301 are interconnected and connected to the voltage output terminal VCC of the power-on / off module. One end of capacitor C303 is connected to the voltage output terminal VCC of the power-on / off module, and the other end is grounded. Pins 4 and 5 of voltage chip U301 are interconnected and serve as the voltage output terminal VDD of the voltage conversion module. One end of capacitor C301 is connected to the voltage output terminal VDD of the voltage conversion module, and the other end is grounded. One end of resistor R302 and one end of resistor R303 are connected to the voltage output terminal VDD of the voltage conversion module. The other end of resistor R302 is connected to one end of resistor R301 and the voltage chip. The third pin of U301; the other end of resistor R303 is connected to the fourteenth pin of voltage chip U301; the other end of resistor R301 is grounded together with the second pin of voltage chip U301; the twelfth and thirteenth pins of voltage chip U301 are interconnected and connected together with the first pin of voltage chip U301 to one end of capacitor C302, the other end of capacitor C302 is grounded; the fifteenth pin of voltage chip U301 is grounded together; the sixth and seventh pins of voltage chip U301 are connected together to one end of inductor L301, the other end of inductor L301 is connected to the eighth and ninth pins of voltage chip U301.

[0086] The voltage conversion module is responsible for converting VCC to a stable VDD to power downstream modules. VCC is input through pins 10 and 11 of U301, and C303 filters out input ripple. After U301 starts up, it completes energy storage and voltage conversion through inductor L301 between pins 6 and 7 and pins 8 and 9. The converted VDD is output through pins 4 and 5, and C301 filters out output ripple. R302, R303, and R301 form a voltage divider feedback network, feeding the VDD signal back to pins 3 and 14 of U301. The chip dynamically adjusts the duty cycle of the switching transistor to achieve closed-loop stable control of VDD. Pins 1, 12, and 13 of U301 are connected to ground via C302 for filtering in the chip's reference circuit; pins 15 and 2 are grounded together with R301 to ensure circuit reference consistency, achieving efficient and stable voltage conversion throughout the process. U301 can be a TPS63020.

[0087] Reference Figure 5 In an embodiment of the present invention, the first pin of the isolation module serves as the voltage input terminal of the isolation module; the second and third pins of the isolation module constitute the communication port after isolation; the sixth and seventh pins of the isolation module constitute the communication port before isolation; and the fourth and fifth pins of the isolation module are grounded.

[0088] The isolation module, as a core safety unit, achieves dual isolation of voltage and communication. Its first pin is connected to the voltage conversion module VDD, which outputs ISO_VDD after internal isolation to power downstream modules; pins six and seven (communication ports before isolation) are connected to the main control module to receive control signals, and pins two and three (communication ports after isolation) are connected to the stimulation module to transmit isolated signals, avoiding interference from both sides; pins four and five are grounded together to provide a unified reference, ensuring the isolation effect and guaranteeing circuit safety and signal transmission accuracy.

[0089] Reference Figure 6a and Figure 6b In an embodiment of the present invention, the main control module includes a main control chip U501, a screen U502, buttons SW501, SW502, and SW503, a crystal oscillator X1, a crystal oscillator X2, a transistor Q501, resistors R501, R502, R503, R504, R505, R506, R507, R508, R509, R510, and R511, and capacitors C501, C502, C503, C504, C505, C506, C507, C508, C509, C510, C511, C512, C513, and C514; wherein:

[0090] Pins 1, 13, 19, 32, 41, 48, 55, 57, 58, 60, and 64 of the main control chip U501 are connected to the voltage output terminal VDD of the voltage conversion module.

[0091] One end of capacitors C502, C503, C504, C505, C506, and C507 is connected to the voltage output terminal VDD of the voltage conversion module, and the other end is grounded.

[0092] Pin 41 of the main control chip U501 is connected to one end of resistor R506, and the other end of resistor R506 is connected to the voltage output terminal VDD of the voltage conversion module.

[0093] Pin 55 of the main control chip U501 is connected to one end of resistor R505, and the other end of resistor R505 is connected to the voltage output terminal VDD of the voltage conversion module.

[0094] Pin 57 of the main control chip U501 is connected to one end of resistor R504, and the other end of resistor R504 is connected to the voltage output terminal VDD of the voltage conversion module.

[0095] Pin 58 of the main control chip U501 is connected to one end of resistor R503. The other end of resistor R503 is connected to the other end of resistor R504 and then connected to the voltage output terminal VDD of the voltage conversion module.

[0096] Pin 37 of the main control chip U501 is connected to one end of button SW501. Pin 37 of the main control chip U501 is also connected to one end of capacitor C512. Pin 37 of the main control chip U501 is also connected to one end of resistor R507. Pin 38 of the main control chip U501 is connected to one end of button SW502. Pin 38 of the main control chip U501 is also connected to one end of capacitor C513. Pin 38 of the main control chip U501 is also connected to one end of resistor R508. Pin 39 of the main control chip U501 is connected to one end of button SW503. Pin 39 of the main control chip U501 is also connected to one end of capacitor C514. Pin 39 of the main control chip U501 is also connected to one end of resistor R509.

[0097] The other ends of buttons SW501, SW502, and SW503 are all grounded; the other ends of capacitors C512, C513, and C514 are all grounded; the other ends of resistors R507, R508, and R509 are all connected to the voltage output terminal VDD of the voltage conversion module.

[0098] The base of transistor Q501 is connected to one end of resistor R510, and the other end of resistor R510 is connected to pin 15 of the main control chip U501; the collector of transistor Q501 is connected to one end of resistor R511, and the other end of resistor R511 is connected to pin 14 of screen U502; the emitter of transistor Q501 is grounded.

[0099] The fifth pin of screen U502 is connected to the twenty-fourth pin of main control chip U501, the sixth pin of screen U502 is connected to the twentieth pin of main control chip U501, the seventh pin of screen U502 is connected to the twenty-first pin of main control chip U501, the eighth pin of screen U502 is connected to the twenty-third pin of main control chip U501, and the ninth pin of screen U502 is connected to the twenty-fifth pin of main control chip U501.

[0100] Pins 10 and 13 of screen U502 are connected to the voltage output terminal VDD of the voltage conversion module, and pin 11 of screen U502 is grounded.

[0101] The first pin of crystal oscillator X1 is connected to one end of capacitor C509. The first pin of crystal oscillator X1 is also connected to the fifth pin of the main control chip U501. The third pin of crystal oscillator X1 is connected to capacitor 508. The third pin of crystal oscillator X1 is also connected to the sixth pin of the main control chip U501. The other ends of capacitors C508 and C509 are grounded. The second and fourth pins of crystal oscillator X1 are grounded.

[0102] The first pin of crystal oscillator X2 is connected to one end of capacitor C510. The first pin of crystal oscillator X2 is also connected to the fourth pin of the main control chip U501. The second pin of crystal oscillator X2 is connected to one end of capacitor 511. The second pin of crystal oscillator X2 is also connected to the third pin of the main control chip U501. The other ends of capacitors C510 and C511 are grounded.

[0103] Pins 51 and 52 of the main control chip U501 serve as the signal communication interface for the main control module;

[0104] One end of resistor R501 is connected to the voltage output terminal VDD of the voltage conversion module, and the other end is connected to one end of capacitor C501 and the seventh pin of the main control chip U501.

[0105] Pins 12, 18, 31, 47, 60, and 63 of the main control chip U501 are grounded;

[0106] Pin 60 of the main control chip U501 is connected to one end of resistor R502, and the other end of resistor R502 is grounded.

[0107] The main control module is the core control center of the vagus nerve stimulator. It is responsible for receiving user operation commands, generating control signals, driving the screen display, maintaining the timing stability of the device, and communicating with the isolation module. Its operation process follows the predetermined connection relationship of each component to ensure convenient operation and accurate signal processing.

[0108] In terms of power supply, the stable VDD voltage output by the voltage conversion module provides power to the entire main control module. It is directly connected to pins 1, 13, 19, 32, 41, 48, 55, 57, 58, 60, and 64 of the main control chip U501, and also provides power to capacitors C502-C507. These capacitors are connected to VDD at one end and grounded at the other end, forming a distributed decoupling filter network, which can effectively filter out high-frequency ripple and transient interference in the power supply voltage, ensuring the purity of power supply to each pin of U501. At the same time, pins 41, 55, 57, and 58 of U501 are also connected to VDD again through resistors R506, R505, R504, and R503, respectively, forming a multiple pull-up structure to enhance the level stability of these pins and avoid signal distortion caused by voltage fluctuations.

[0109] User interaction is achieved through buttons SW501-SW503. These three buttons are connected to pins 37, 38, and 39 of the U501, respectively. Each button is equipped with pull-up resistors (R507-R509) and decoupling capacitors (C512-C514). Under normal conditions, the pull-up resistors clamp the corresponding pins to a high level. When the user presses a button, the other end of the button is grounded, causing the pin level to go low. The U501 identifies the operation command by detecting the level transition, while the decoupling capacitors suppress instantaneous level fluctuations caused by button mechanical bounce, ensuring accurate command recognition. Users can use these three buttons to switch stimulation modes, adjust current levels, and set stimulation duration. The U501 model can be STM32F103RGT6.

[0110] Screen U502 serves as the human-computer interaction display terminal. Its 10th and 13th pins are connected to VDD for power supply, and its 11th pin is grounded for reference. Pins 5, 6, 7, 8, and 9 are connected to pins 24, 20, 21, 23, and 25 of U501, respectively, receiving display signals such as mode information and parameter data transmitted by U501. Simultaneously, pin 15 of U501 is connected to the base of transistor Q501 via resistor R510. The collector of Q501 is connected to pin 14 of U502 via resistor R511, and its emitter is grounded, forming the screen enable control loop. When U501 outputs a high level to the base of Q501, Q501 conducts, providing an enable signal to U502, and the screen lights up. When it outputs a low level, Q501 is cut off, and the screen turns off, achieving energy-saving control.

[0111] Stable timing is fundamental to the reliable operation of the main control module. Crystal oscillators X1 and X2, along with matching capacitors C508-C511, constitute a clock oscillation circuit: the first and third pins of X1 are connected to the fifth and sixth pins of U501, respectively, forming an oscillation loop with C508 and C509 grounded; the first and second pins of X2 are connected to the fourth and third pins of U501, respectively, with C510 and C511 grounded. The two crystal oscillators can provide clock signals of different frequencies (such as a high-frequency master clock and a low-frequency real-time clock), providing a precise timing reference for U501's instruction processing and signal transmission. For communication, pins 51 and 52 of U501 serve as signal communication interfaces, directly connecting to the pre-isolation communication port of the isolation module, accurately transmitting the processed control signals to the isolation module, and then forwarding them to the stimulation module. In addition, one end of resistor R501 is connected to VDD, and the other end is connected to pin 7 of C501 and U501, forming a reset or reference filter circuit to ensure stable startup of U501; pins 12, 18, 31, 47, 60 and 63 of U501 are grounded, with pin 60 also grounded through R502, forming a double pull-down structure to further stabilize the pin level, avoid ground potential drift affecting chip operation, and ensure stable operation and precise control of the main control module.

[0112] Reference Figure 7 In an embodiment of the present invention, the boost module includes a boost chip U601, an inductor L601, a diode D601, a diode D602, a resistor R601, a resistor R602, a capacitor C601, a capacitor C602, and a capacitor C603; wherein:

[0113] The first pin of the boost converter U601 is connected to one end of resistors R601 and R602; the other end of resistor R602 is grounded; the other end of resistor R601 is connected to the negative terminal of diode D602, serving as the voltage output terminal BOOST_OUT of the boost module; the positive terminal of diode D602 is connected to the third and fourth pins of the boost converter U601; the third and fourth pins of the boost converter U601 are also connected to one end of inductor L601; the other end of inductor L601 is connected to the fifth pin of the boost converter U601 and... Pin 8 is connected to the voltage output terminal ISO_VDD of the isolation module as the voltage input terminal of the boost module; one end of capacitor C603 is connected to the voltage output terminal ISO_VDD of the isolation module, and the other end is connected to pin 9 of the boost chip U601 and grounded; the negative terminal of diode D601, one end of capacitor C601, and one end of capacitor C602 are connected to the voltage output terminal BOOST_OUT of the boost module; the positive terminal of diode D601, the other end of capacitor C601, and the other end of capacitor C602 are grounded.

[0114] Specifically, during the power input phase, the ISO_VDD voltage output from the isolation module serves as the input terminal of the boost module. On one hand, it directly connects to pins 5 and 8 of the boost chip U601, providing power to the chip. On the other hand, it forms an input-side decoupling filter circuit through capacitor C603, with one end connected and the other end grounded with pin 9 of U601. This effectively filters out high-frequency interference and transient ripple in the ISO_VDD voltage, preventing voltage fluctuations from affecting the stability of the chip's internal switching transistors. During the boost conversion phase, after power-on, U601 activates its internal switching transistors. Pins 3, 4, 5, and 8 form a core energy storage and conversion circuit through inductor L601: when the internal switching transistor is on, the ISO_VDD voltage forms a current path through L601, rapidly storing electromagnetic energy, and the current increases linearly. When the switching transistor is off, a reverse induced electromotive force is generated across L601, releasing the stored electromagnetic energy. At this time, diode D602 conducts forward, guiding the energy released by the inductor to the output terminal, completing the energy conversion from low voltage to high voltage. During the voltage stabilization control phase, resistors R601 and R602 form a voltage divider feedback network. The boosted BOOST_OUT voltage is divided by R601 and R602 and then the feedback voltage signal is transmitted to the chip through the first pin of U601. The chip dynamically adjusts the duty cycle of the internal switching transistor by comparing the feedback voltage with the internal reference voltage. If the BOOST_OUT voltage is too high, the chip reduces the on-time of the switching transistor, thereby reducing the inductor energy storage and output voltage; if the voltage is too low, the chip increases the duty cycle to increase the output voltage, thus achieving closed-loop stabilization control of the BOOST_OUT voltage. In the output filtering and protection stage, BOOST_OUT, as the voltage output terminal of the boost module, uses diode D601 for freewheeling and reverse protection to prevent high voltage from flowing back to the chip or inductor, thus avoiding device damage. On the other hand, capacitors C601 and C602 are connected in parallel, one end connected to BOOST_OUT and the other end grounded, forming a composite filter network. This network filters out high-frequency ripple in the output voltage and suppresses instantaneous voltage fluctuations, ensuring a smooth and stable BOOST_OUT voltage and providing a clean and continuous high-voltage power supply to the stimulation module. U601 can be an LGS6302EP.

[0115] In a preferred embodiment of the present invention, the electrical connector on the electrode wire is a 2.5mm audio plug 1; the first magnetic connector is a circular magnetic female head 2 with a center contact.

[0116] In a preferred embodiment of the present invention, the second magnetic connector on the ear acupoint electrode is a circular magnetic male head 4 with a central pin.

[0117] In a preferred embodiment of the present invention, the surface electrode of the auricular acupoint electrode is a metal contact electrode 5 with a self-adhesive sticker.

[0118] Reference Figure 9 and Figure 10 In this embodiment of the invention, the electrical connector on the electrode wire can be a 2.5mm audio plug 1. This plug has a mature structure, a smooth insertion and removal feel, and its size precisely matches the stimulation output interface of the stimulation module. When using it, the user only needs to align the 2.5mm audio plug 1 with the corresponding interface of the stimulation module and gently insert it to complete the mechanical fixation and electrical connection. The metal contacts of the plug and the interface fit tightly, which can effectively reduce contact resistance and avoid the attenuation or interruption of the electrical stimulation signal due to loose connection. At the same time, the anti-misinsertion design of the 2.5mm audio plug 1 can prevent the user from inserting it in reverse and causing damage to the device or plug, ensuring the safety of use. The first magnetic connector on the electrode wire is a circular magnetic female head 2 with a center contact, and the second magnetic connector on the corresponding ear acupoint electrode is a circular magnetic male head 4 with a center pin. The two adopt a magnetic attraction design, and the circular structure allows the user to achieve quick adsorption without precise alignment. During use, the user holds the ear acupoint electrode and brings the magnetic male head 4 close to the magnetic female head 2 of the electrode wire. The two automatically align and tightly connect under the action of magnetism. The operation is simple and efficient, especially suitable for blind operation when users wear the electrode themselves. The center contact of the magnetic female head 2 and the center pin of the magnetic male head 4 form the core electrical conduction path. After they are connected, the pin and the contact are in close contact, ensuring that the electrical stimulation signal is transmitted from the electrode wire to the ear acupoint electrode without loss. The magnetic attraction force of the magnetic structure is precisely calibrated to ensure a firm connection and prevent the two from separating due to limb movement during use. When it is necessary to replace the ear acupoint electrode or adjust its position, it can be easily separated with a little external force, avoiding pulling on the ear skin. The surface electrode of the ear acupoint electrode is a metal contact electrode 5 with a built-in adhesive patch. The metal contact is made of a material with excellent conductivity (such as medical-grade stainless steel or gold-plated material), which can efficiently conduct electrical stimulation signals and has good biocompatibility to avoid skin irritation and allergic reactions. The built-in adhesive patch is made of medical-grade low-sensitivity pressure-sensitive adhesive, which is gentle and long-lasting. Before use, the user only needs to clean the skin of the area to be applied to the ear to remove oil and dust. Then, align the adhesive side of the metal contact electrode 5 with the vagus nerve stimulation point on the ear as instructed by the doctor and press gently to achieve a firm fixation. The adhesive patch can closely conform to the skin texture and will not fall off even during the user's daily activities (such as walking, bending over, turning over, etc.), ensuring the continuity of electrical stimulation. At the same time, the adhesive patch can be reused multiple times without leaving adhesive residue. Changing the application position will not cause skin irritation or damage, further improving the convenience and comfort of use. The entire connection and application process can be completed independently by the user without the assistance of professionals. The cooperation of each component ensures the stable transmission of electrical stimulation signals while taking into account the safety and comfort of use, which is in line with the core design goal of non-invasive and home-use ear vagus nerve stimulators.

[0119] The stimulator provided in this invention achieves non-invasive vagus nerve stimulation of the ear through a modular circuit design, avoiding the risks and trauma of traditional implantation surgery. Its internal electrical isolation architecture and constant current output control ensure precise and adjustable stimulation energy while providing high safety, effectively preventing leakage or overload risks. The device is highly integrated and portable, and with magnetic electrodes and an ergonomic ear-hook structure, it is secure and comfortable to wear, easy to operate, and greatly improves user compliance and daily convenience. Ultimately, this invention successfully transforms professional neuromodulation technology into a safe, reliable, and self-operated home health management tool, providing an innovative and accessible solution for the adjunctive treatment of chronic neurological dysfunction and daily health intervention.

[0120] The above provides a detailed description of the provided auricular vagus nerve stimulator. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the invention. At the same time, those skilled in the art will recognize that, based on the ideas of the invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the invention.

Claims

1. A vagus nerve stimulator, characterized in that, The stimulator includes a stimulating device and stimulating electrodes. The stimulating device includes: a charging / battery power supply switching module, a power on / off module, a voltage conversion module, a main control module, an isolation module, a boost module, and a stimulating module. The stimulating electrodes include: electrode leads and auricular electrodes. The charging / battery power supply switching module has a voltage output terminal (VOUT). The voltage input terminal of the power-on / off module is connected to the voltage output terminal (VOUT) of the charging / battery power supply switching module, and the voltage output terminal (VCC) of the power-on / off module is connected to the voltage input terminal of the voltage conversion module. The voltage output terminal (VDD) of the voltage conversion module is connected to the voltage input terminal of the main control module and the voltage input terminal of the isolation module; The pre-isolation communication terminal of the isolation module is connected to the signal communication terminal of the main control module, the post-isolation communication terminal of the isolation module is connected to the signal communication terminal of the stimulation module, and the voltage output terminal (ISO_VDD) of the isolation module is connected to the voltage input terminal of the boost module and the power supply voltage input terminal of the stimulation module. The stimulation voltage input terminal of the stimulation module is connected to the voltage output terminal (BOOST_OUT) of the boost module; One end of the electrode wire is provided with an electrical connector for connecting to the output end of the stimulation module, and the other end of the electrode wire is provided with a first magnetic connector. An ear-hanging structure is provided between the electrical connector and the first magnetic connector. One end of the ear acupoint electrode is provided with a second magnetic connector that is adapted to the first magnetic connector, and the other end of the ear acupoint electrode is provided with at least two surface electrodes for attaching to the skin of the human ear.

2. The stimulator according to claim 1, characterized in that, The charging / battery power supply switching module includes a battery (BAT), a power management chip (U101), diodes (D101), (D102), and (D103), capacitors (C101) and (C102), an inductor (L101), a resistor (R101), a resistor (R102), and a field-effect transistor (Q101); wherein: The cathodes of diodes (D101) and (D102) are connected to the third and fourth pins of the power management chip (U101), respectively. One end of capacitor (C101) is connected to the second pin of the power management chip (U101), and the other end is grounded. The second pin of the power management chip (U101) is connected to the charging voltage input terminal (VIN). The fifth pin of the power management chip (U101) is shorted to the charging voltage input terminal (VIN). One end of capacitor (C102) and the positive terminal of the battery (BAT) are connected to the sixth pin of the power management chip (U101), and the other end of capacitor (C102) and the negative terminal of the battery (BAT) are grounded. One end of inductor (L101) is connected to the seventh pin of the power management chip (U101) and the resistor (R1). One end of the resistor (R101) is connected to the eighth pin of the power management chip (U101); the other end of the resistor (R101) is connected to the positive terminal of the battery (BAT); the first and ninth pins of the power management chip (U101) are grounded; the drain of the field-effect transistor (Q101) is connected to the positive terminal of the battery (BAT), and the source of the field-effect transistor (Q101) serves as the voltage output terminal (VOUT) of the charging / battery power supply switching module; the gate of the field-effect transistor (Q101), one end of the resistor (R102), and the positive terminal of the diode (D103) are all connected to the charging voltage input terminal (VIN); the other end of the resistor (R102) is grounded; the negative terminal of the diode (D103) is connected to the voltage output terminal (VOUT) of the charging / battery power supply switching module.

3. The stimulator according to claim 2, characterized in that, The power-on / off module includes a field-effect transistor (Q201), a transistor (Q202), resistors (R201, R202, R203, R204), a capacitor (C201), a switch (SW201), a diode (D201), and a diode (D202); wherein: The source of the field-effect transistor (Q201) and one end of the resistor (R201) are connected to the voltage output terminal (VOUT) of the charging / battery power supply switching module. The drain of the field-effect transistor (Q201) serves as the voltage output terminal (VCC) of the power-on / off module. The gate of the field-effect transistor (Q201) is connected to the other end of the resistor (R201) and one end of the resistor (R202). The other end of the resistor (R202) is connected to the collector of the transistor (Q202) and the diode. The positive terminal of the diode (D201); the emitter of the transistor (Q202) is grounded, and the base of the transistor (Q202) is connected to one end of the resistor (R203) and the resistor (R204); the other end of the resistor (R204) is grounded; the negative terminal of the diode (D201) is connected to the negative terminal of the diode (D202), one end of the capacitor (C201), and one end of the switch (SW201); the other end of the capacitor (C201) and the other end of the switch (SW201) are grounded.

4. The stimulator according to claim 3, characterized in that, The voltage conversion module includes a voltage chip (U301), resistors (R301), (R302), (R303), capacitors (C301), (C302), (C303), and an inductor (L301); wherein: The tenth and eleventh pins of the voltage chip (U301) are interconnected and connected to the voltage output terminal (VCC) of the power-on / off module. One end of the capacitor (C303) is connected to the voltage output terminal (VCC) of the power-on / off module, and the other end is grounded. The fourth and fifth pins of the voltage chip (U301) are interconnected and serve as the voltage output terminal (VDD) of the voltage conversion module. One end of the capacitor (C301) is connected to the voltage output terminal (VDD) of the voltage conversion module, and the other end is grounded. One end of the resistor (R302) and one end of the resistor (R303) are connected to the voltage output terminal (VDD) of the voltage conversion module. The other end of the resistor (R302) is connected to one end of the resistor (R301) and the voltage chip. The third pin of (U301); the other end of the resistor (R303) is connected to the fourteenth pin of the voltage chip (U301); the other end of the resistor (R301) is grounded together with the second pin of the voltage chip (U301); the twelfth and thirteenth pins of the voltage chip (U301) are interconnected and connected together with the first pin of the voltage chip (U301) to one end of the capacitor (C302), the other end of the capacitor (C302) is grounded; the fifteenth pin of the voltage chip (U301) is grounded; the sixth and seventh pins of the voltage chip (U301) are connected together to one end of the inductor (L301), the other end of the inductor (L301) is connected to the eighth and ninth pins of the voltage chip (U301).

5. The stimulator according to claim 4, characterized in that, The first pin of the isolation module serves as the voltage input terminal of the isolation module; the second and third pins of the isolation module constitute the communication port after isolation; the sixth and seventh pins of the isolation module constitute the communication port before isolation; and the fourth and fifth pins of the isolation module are grounded.

6. The stimulator according to claim 5, characterized in that, The main control module includes a main control chip (U501), a screen (U502), buttons (SW501), (SW502), (SW503), a crystal oscillator (X1), a crystal oscillator (X2), a transistor (Q501), resistors (R501), (R502), (R503), (R504), (R505), (R506), (R507), (R508), (R509), (R510), (R511), and capacitors (C501), (C502), (C503), (C504), (C505), (C506), (C507), (C508), (C509), (C510), (C511), (C512), (C513), and (C514); wherein: The first, thirteenth, nineteenth, thirty-second, forty-first, forty-eighth, fifty-fifth, fifty-seventh, fifty-eighth, sixtieth, and sixty-fourth pins of the main control chip (U501) are connected to the voltage output terminal (VDD) of the voltage conversion module. One end of capacitors (C502), (C503), (C504), (C505), (C506), and (C507) is connected to the voltage output terminal (VDD) of the voltage conversion module, and the other end is grounded. The 41st pin of the main control chip (U501) is connected to one end of the resistor (R506), and the other end of the resistor (R506) is connected to the voltage output terminal (VDD) of the voltage conversion module. The 55th pin of the main control chip (U501) is connected to one end of the resistor (R505), and the other end of the resistor (R505) is connected to the voltage output terminal (VDD) of the voltage conversion module. The fifty-seventh pin of the main control chip (U501) is connected to one end of the resistor (R504), and the other end of the resistor (R504) is connected to the voltage output terminal (VDD) of the voltage conversion module. The fifty-eighth pin of the main control chip (U501) is connected to one end of the resistor (R503), and the other end of the resistor (R503) is connected to the other end of the resistor (R504) and then connected to the voltage output terminal (VDD) of the voltage conversion module. The 37th pin of the main control chip (U501) is connected to one end of the button (SW501). The 37th pin of the main control chip (U501) is also connected to one end of the capacitor (C512). The 37th pin of the main control chip (U501) is also connected to one end of the resistor (R507). The 38th pin of the main control chip (U501) is connected to one end of the button (SW502). The 38th pin of the main control chip (U501) is also connected to one end of the capacitor (C513). The 38th pin of the main control chip (U501) is also connected to one end of the resistor (R508). The 39th pin of the main control chip (U501) is connected to one end of the button (SW503). The 39th pin of the main control chip (U501) is also connected to one end of the capacitor (C514). The 39th pin of the main control chip (U501) is also connected to one end of the resistor (R509). The other ends of the buttons (SW501), (SW502), and (SW503) are all grounded; the other ends of the capacitors (C512), (C513), and (C514) are all grounded; the other ends of the resistors (R507), (R508), and (R509) are all connected to the voltage output terminal (VDD) of the voltage conversion module. The base of the transistor (Q501) is connected to one end of the resistor (R510), and the other end of the resistor (R510) is connected to the fifteenth pin of the main control chip (U501); the collector of the transistor (Q501) is connected to one end of the resistor (R511), and the other end of the resistor (R511) is connected to the fourteenth pin of the screen (U502); the emitter of the transistor (Q501) is grounded. The fifth pin of the screen (U502) is connected to the twenty-fourth pin of the main control chip (U501), the sixth pin of the screen (U502) is connected to the twentieth pin of the main control chip (U501), the seventh pin of the screen (U502) is connected to the twenty-first pin of the main control chip (U501), the eighth pin of the screen (U502) is connected to the twenty-third pin of the main control chip (U501), and the ninth pin of the screen (U502) is connected to the twenty-fifth pin of the main control chip (U501). The tenth and thirteenth pins of the screen (U502) are connected to the voltage output terminal (VDD) of the voltage conversion module, and the eleventh pin of the screen (U502) is grounded. The first pin of the crystal oscillator (X1) is connected to one end of the capacitor (C509), and the first pin of the crystal oscillator (X1) is also connected to the fifth pin of the main control chip (U501). The third pin of the crystal oscillator (X1) is connected to the capacitor (508), and the third pin of the crystal oscillator (X1) is also connected to the sixth pin of the main control chip (U501). The other ends of the capacitors (C508) and (C509) are grounded, and the second and fourth pins of the crystal oscillator (X1) are grounded. The first pin of the crystal oscillator (X2) is connected to one end of the capacitor (C510), and the first pin of the crystal oscillator (X2) is also connected to the fourth pin of the main control chip (U501). The second pin of the crystal oscillator (X2) is connected to one end of the capacitor (511), and the second pin of the crystal oscillator (X2) is also connected to the third pin of the main control chip (U501). The other ends of the capacitors (C510 and C511) are grounded. The 51st and 52nd pins of the main control chip (U501) serve as the signal communication interface of the main control module. One end of the resistor (R501) is connected to the voltage output terminal (VDD) of the voltage conversion module, and the other end is connected to one end of the capacitor (C501) and the seventh pin of the main control chip (U501). Pins 12, 18, 31, 47, 60 and 63 of the main control chip (U501) are grounded; The sixtieth pin of the main control chip (U501) is connected to one end of the resistor (R502), and the other end of the resistor (R502) is grounded.

7. The stimulator according to claim 6, characterized in that, The boost module includes a boost chip (U601), an inductor (L601), a diode (D601), a diode (D602), a resistor (R601), a resistor (R602), a capacitor (C601), a capacitor (C602), and a capacitor (C603); wherein: The first pin of the boost converter chip (U601) is connected to one end of the resistors (R601 and R602); the other end of the resistor (R602) is grounded; the other end of the resistor (R601) is connected to the negative terminal of the diode (D602) and serves as the voltage output terminal (BOOST_OUT) of the boost module; the positive terminal of the diode (D602) is connected to the third and fourth pins of the boost converter chip (U601); the third and fourth pins of the boost converter chip (U601) are also connected to one end of the inductor (L601); the other end of the inductor (L601) is connected to the boost converter chip (U601). The fifth and eighth pins of the voltage converter are connected to the voltage output (ISO_VDD) of the isolation module as the voltage input terminal of the boost module; one end of the capacitor (C603) is connected to the voltage output (ISO_VDD) of the isolation module, and the other end is connected to the ninth pin of the boost chip (U601) and grounded; the negative terminal of the diode (D601), one end of the capacitor (C601), and one end of the capacitor (C602) are all connected to the voltage output (BOOST_OUT) of the boost module; the positive terminal of the diode (D601), the other end of the capacitor (C601), and the other end of the capacitor (C602) are all grounded.

8. The stimulator according to claim 7, characterized in that, The electrical connector on the electrode wire is a 2.5mm audio plug; the first magnetic connector is a circular magnetic female with a center contact.

9. The stimulator according to claim 8, characterized in that, The second magnetic connector on the ear acupoint electrode is a circular male magnetic connector with a central pin.

10. The stimulator according to claim 9, characterized in that, The surface electrode of the ear acupuncture electrode is a metal contact electrode with a self-adhesive sticker.

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