Disposable self-powered acupoint stimulation patch with integrated microcurrent stimulation

Abstract

The application provides a self-powered disposable acupuncture patch with integrated micro-current stimulation, which comprises a needle body and a circular patch main body. The needle body is arranged in a central passage of the circular patch main body, the needle tip extends out of the skin side, and the needle tail conductive interface is detachably connected with the patch side conductive interface. A micro disposable battery in the circular patch main body supplies power to a micro-current control circuit, a first output end of the micro-current control circuit is connected with the needle body through two conductive interfaces, and a second output end of the micro-current control circuit is connected with a ring-shaped return electrode arranged on the skin side and surrounding the central passage. The needle body and the ring-shaped return electrode are electrically insulated in the circular patch main body, so that the current forms a closed current path through the needle body, human body tissue and the ring-shaped return electrode. The application does not need external power supply and wires, and has compact structure and is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a disposable self-powered acupuncture patch with integrated microcurrent stimulation. Background Technology

[0002] Electroacupuncture, which combines acupuncture with electrical stimulation, typically requires inserting needles into acupoints and then connecting them to an external electroacupuncture device via wires and conductive clips. The external device then provides the stimulation current. This type of device requires an external power source and wires. During use, the wires may pull on the needles or restrict the user's movement, and it is not conducive to prolonged wear or continuous stimulation.

[0003] To improve ease of use, existing technologies have proposed stimulation devices that incorporate power sources or stimulation circuits within patches, wearable carriers, or small housings. However, transdermal electrical stimulation patches typically form a surface current path through two electrodes positioned on the skin surface, making it difficult to simultaneously stimulate deep acupoints after the needle has penetrated the tissue. Simply integrating the battery, control circuitry, and needle does not necessarily create a complete stimulation current loop.

[0004] Specifically, when the control circuit is connected to the needle body through only one output terminal, the stimulation current lacks a return path from the human tissue to the control circuit. Using a separately attached return electrode requires additional electrode pads and connecting wires, failing to fully utilize the compact and easy-to-wear advantages of the integrated patch structure. If both the stimulation and return ends are placed in the patch, but their positions, connections, and insulation relationships are unclear, internal short circuits may occur, preventing the stimulation current from passing through the human tissue along the intended path. Summary of the Invention

[0005] This invention provides a disposable self-powered acupuncture patch with integrated microcurrent stimulation, which enables a safe and reliable microcurrent transmission closed loop between the stimulation end entering the human tissue and the patch located on the body surface in a disposable patch-type acupuncture device that does not require an external power supply or external wires, and avoids direct short circuit between the two output paths inside the patch.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A disposable self-powered acupuncture patch with integrated microcurrent stimulation, comprising a needle body and a circular patch body; The needle body includes a needle tip, a needle body trunk, and a conductive interface at the needle tail. The circular patch body includes an insulating shell, a pressure-sensitive adhesive layer, a micro disposable battery, a micro current control circuit, a patch-side conductive interface, and a ring-shaped return electrode. The pressure-sensitive adhesive layer is disposed on the skin side of the circular patch body. The circular patch body has a central channel, the needle body passes through the central channel, the needle tip extends from the skin side of the circular patch body, and the needle tail conductive interface is detachably electrically connected to the patch side conductive interface; The micro disposable battery is electrically connected to the micro current control circuit. The micro current control circuit has a first output terminal and a second output terminal. The first output terminal is electrically connected to the main body of the needle body via the patch side conductive interface and the needle tail conductive interface in sequence. The second output terminal is electrically connected to the annular return electrode. The annular reflux electrode is disposed on the skin side of the circular patch body and surrounds the central channel. The annular reflux electrode and the needle body are electrically insulated inside the circular patch body so as to form a closed current path through the needle body, the human tissue and the annular reflux electrode when the needle body pierces the human tissue and the annular reflux electrode contacts the skin.

[0007] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. The miniature disposable battery, control circuit, needle body and reflux electrode provided by the present invention are integrated in the patch, which does not require external power supply and wires, making the structure more compact and easy to apply and wear.

[0008] 2. The first output terminal of the control circuit is connected to the needle body, and the second output terminal is connected to the annular return electrode on the skin side, so that the stimulation current can form a complete closed path through the needle body, human tissue and the annular return electrode.

[0009] 3. The annular reflux electrode is set around the central channel through which the needle body passes, which allows the surface reflux end to be arranged within a small patch area, without the need to attach a separate reflux electrode away from the needle body.

[0010] 4. The needle body and the annular reflux electrode are electrically insulated inside the patch, which helps to prevent the two output terminals from being directly short-circuited inside the device, allowing the current to pass through human tissue along a predetermined path.

[0011] 5. The central channel, detachable conductive interface, and pressure-sensitive adhesive layer work together to facilitate the assembly of the needle body and the patch body, overall needle insertion, and application and fixation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0013] Figure 1 This is an exploded view of the main structure of the acupuncture patch of the present invention; Figure 2 This is a schematic diagram of the structure of the circular patch body of the present invention, wherein, Figure 2 (a) in the image is a top view of the circular patch body. Figure 2 (b) in the middle is along Figure 2 The sectional view obtained by cutting along line AA in the middle; Figure 3 This is a schematic diagram showing the connection between the pin-tail conductive interface and the patch-side conductive interface of the present invention, wherein... Figure 3 (a) in the diagram is a schematic diagram of the connection between two conductive interfaces. Figure 3 (b) in the diagram is a schematic diagram of the magnetic attraction and conductive connection between the first magnet and the second magnet; Figure 4 This is a complete current path connection block diagram of the microcurrent control circuit of the present invention; Figure 5 This is a schematic diagram illustrating the usage state of the acupuncture patch of the present invention, wherein... Figure 5 (a) in the diagram is a schematic diagram of the acupoint locations. Figure 5 (b) in the diagram is a schematic diagram of the needle's usage state when it is inserted into human tissue.

[0014] Explanation of reference numerals in the attached figures 1-Needle body; 11-Needle tip; 12-Needle body main body; 13-Needle tail conductive interface; 131-First magnet, also serving as a conductive contact; 2-Circular patch body; 21-Insulating shell; 22-Pressure-sensitive adhesive layer; 23-Miniature disposable battery; 24-Micro current control circuit; 241-Pulse generation module; 242-Current adjustment module; 243-Current limiting protection module; 25-Pattern side conductive interface; 251-Second magnet, also serving as a conductive contact; 26-Insulating isolation film, also serving as a power supply activation pull tab; 27-Indicator light; 28-Miniature paddle; 29-Annular reflux electrode; P-Acupoint; S-Skin surface; M-Deep muscle; B-Bone or deep tissue; AA-Sectioning line. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention.

[0016] Unless otherwise stated, the terminology used in this invention has the same meaning as commonly understood by those skilled in the art. If a term is defined in this invention and its definition differs from the common understanding in the art, the definition of this invention shall prevail.

[0017] As mentioned earlier, a key challenge is to establish a safe and reliable microcurrent transmission loop between the stimulation end that enters the human tissue and the patch located on the body surface in a disposable patch-type acupuncture device that requires no external power supply or external wires, while avoiding direct short circuits between the two output paths within the patch. Therefore, this invention provides the following technical solution.

[0018] See Figures 1 to 5 This invention provides a disposable self-powered acupuncture patch with integrated microcurrent stimulation, comprising a needle body 1 and a circular patch body 2. The needle body 1 includes a needle tip 11, a needle body trunk 12, and a needle tail conductive interface 13. The circular patch body 2 includes an insulating shell 21, a pressure-sensitive adhesive layer 22, a miniature disposable battery 23, a microcurrent control circuit 24, a patch-side conductive interface 25, and a ring-shaped return electrode 29. The pressure-sensitive adhesive layer 22 is disposed on the skin side of the circular patch body 2.

[0019] The circular patch body 2 has a central channel, through which the needle body 1 passes. The needle tip 11 extends from the skin side of the circular patch body 2, and the conductive interface 13 at the needle tail is detachably connected to the conductive interface 25 on the patch side. After the needle body 1 and the circular patch body 2 are connected, they can be used as a whole to target acupoints, allowing the needle tip 11 to penetrate human tissue and the pressure-sensitive adhesive layer 22 to adhere to the skin surface.

[0020] A miniature disposable battery 23 is electrically connected to a microcurrent control circuit 24 to supply power to the microcurrent control circuit 24. The microcurrent control circuit 24 has a first output terminal and a second output terminal. The first output terminal is electrically connected to the needle body main 12 via a patch-side conductive interface 25 and a needle tail conductive interface 13 in sequence. The second output terminal is electrically connected to an annular reflux electrode 29. The annular reflux electrode 29 is disposed on the skin side of the circular patch body 2 and surrounds the central channel so as to contact the skin surface when the circular patch body 2 is attached to the skin.

[0021] When the needle 1 pierces the human tissue and the annular return electrode 29 contacts the skin, the current output from the first output terminal of the microcurrent control circuit 24 sequentially passes through the patch-side conductive interface 25, the needle tail conductive interface 13, the needle body main body 12, and the needle tip 11 into the human tissue. It is then conducted through the human tissue to the annular return electrode 29 and returns to the second output terminal of the microcurrent control circuit 24, thus forming a closed current path. The annular return electrode 29 and the needle 1 remain electrically insulated within the circular patch body 2, preventing direct conduction between the first and second output terminals via the needle 1 and the annular return electrode 29 within the circular patch body 2.

[0022] Thus, the micro disposable battery 23, microcurrent control circuit 24, needle body 1, and annular reflux electrode 29 are integrated into the circular patch body 2, forming a closed microcurrent path through the needle body 1, human tissue, and annular reflux electrode 29 without the need for an external power supply, wires, or a separately installed surface reflux electrode. The pressure-sensitive adhesive layer 22 can adhere and fix the circular patch body 2 to the skin, while the central channel provides space for the insertion of the needle body 1 and the connection between the needle tail conductive interface 13 and the patch side conductive interface 25.

[0023] See Figure 1 In some embodiments of the present invention, the needle body 1 is made of medical-grade stainless steel; in other embodiments, the needle body 1 includes a needle body substrate and a conductive layer disposed on the surface of the needle body substrate, enabling the needle body 1 to transmit microcurrents through the conductive layer on its surface. The diameter of the needle body 1 is 0.18 mm to 0.35 mm, and the length is 5 mm to 40 mm, so that the appropriate specification of the needle body 1 can be selected according to the application site and the required insertion depth.

[0024] See Figure 3 In some embodiments of the present invention, the needle-tail conductive interface 13 is provided with a first magnet 131 that also serves as a conductive contact, and the patch-side conductive interface 25 is provided with a second magnet 251 that also serves as a conductive contact. The first magnet 131 and the second magnet 251 are magnetically attracted to each other, keeping the needle-tail conductive interface 13 and the patch-side conductive interface 25 connected. At the same time, an electrical connection is formed through the first magnet 131 and the second magnet 251, thereby realizing a detachable connection and conductive connection between the needle body 1 and the circular patch body 2.

[0025] When the first magnet 131 and the second magnet 251 naturally magnetically adhere to each other without external force and are in the assembled state, the contact resistance between the pin-tail conductive interface 13 and the patch-side conductive interface 25 is less than 1Ω. This contact resistance can be measured using a four-wire milliohm meter. A current line and a voltage line are connected to both sides of the magnetic conductive contacts of the two interfaces, a test current is applied, and the voltage drop between the two conductive contacts is measured. The contact resistance is determined based on the applied test current and the measured voltage drop.

[0026] See Figure 1 and Figure 2 In some embodiments of the present invention, the miniature disposable battery 23 and the microcurrent control circuit 24 are disposed within the insulating shell 21, and the patch-side conductive interface 25 is disposed within the central channel. The pressure-sensitive adhesive layer 22 and the annular reflux electrode 29 are disposed on the skin side of the circular patch body 2, with the annular reflux electrode 29 located on the outer periphery of the circular patch body 2. The needle 1 extends through the central channel, and the annular reflux electrode 29 is disposed around the exit position of the needle 1, enabling the needle 1 to pierce human tissue while simultaneously allowing the annular reflux electrode 29 to adhere to the skin surface surrounding the needle 1.

[0027] See Figure 2 In some embodiments of the present invention, the annular reflux electrode 29 is an annular metal electrode, the annular conductive surface of which is exposed to the skin side of the circular patch body 2, so as to directly contact the skin surface when the circular patch body 2 is attached to the skin. An insulating isolator is provided in the central channel. The insulating isolator is an insulating sleeve or an insulating bushing, and the needle body 1 is clearance-fitted with the insulating isolator. The insulating isolator, the extension of the insulating shell 21, and the insulating substrate of the pressure-sensitive adhesive layer 22 are jointly disposed between the needle body 1 and the annular reflux electrode 29, isolating the two from each other, so that the needle body 1 and the annular reflux electrode 29 can only form a conductive path through human tissue.

[0028] See Figure 2 and Figure 3In some embodiments of the present invention, the needle tail conductive interface 13 is provided with a first magnet 131 that also serves as a conductive contact, and the patch side conductive interface 25 is provided with a second magnet 251 that also serves as a conductive contact. The first magnet 131 and the second magnet 251 are magnetically attracted to each other and electrically connected. The annular return electrode 29 is an annular metal electrode, and its annular conductive surface is exposed on the skin side of the circular patch body 2. An insulating isolation element is provided in the central channel. The insulating isolation element is an insulating sleeve or an insulating bushing. The needle body 1 is clearance-fitted with the insulating isolation element. The insulating isolation element, the extension of the insulating shell 21, and the insulating substrate of the pressure-sensitive adhesive layer 22 are jointly disposed between the needle body 1 and the annular return electrode 29. In the assembled state where the first magnet 131 and the second magnet 251 are naturally magnetically attracted and attached, the contact resistance between the needle tail conductive interface 13 and the patch-side conductive interface 25 is less than 1Ω. This allows the first output terminal of the microcurrent control circuit 24 to be stably electrically connected to the needle body 1 via a low-resistance conductive connection formed by the two magnets. Simultaneously, the insulating isolator, the extension of the insulating shell 21, and the insulating substrate of the pressure-sensitive adhesive layer 22 jointly isolate the first output path where the needle body 1 is located from the second output path where the annular return electrode 29 is located. These structures work together to solve the problem in size-constrained disposable patch acupuncture devices where the detachable conductive interface needs to maintain a stable, low-resistance electrical connection while preventing direct conduction between the needle body conductive path near the central channel and the annular return electrode. The magnetic attraction between the first magnet 131 and the second magnet 251 allows the two conductive interfaces to be connected and electrically linked without the need for a clamping mechanism or an external conductive clip. This facilitates the assembly and disassembly of the needle body 1 and the circular patch body 2, and helps reduce current fluctuations caused by changes in the interface contact state. The multiple insulation isolation structure between the needle body 1 and the annular return electrode 29 prevents the first and second output terminals of the microcurrent control circuit 24 from being directly short-circuited inside the circular patch body 2. This allows the stimulation current to form a closed current path through the needle body 1, human tissue, and the annular return electrode 29, thus balancing the ease of operation of the detachable connection, the reliability of the conductive connection, and the insulation safety between the two output paths.

[0029] See Figure 4 In some embodiments of the present invention, the micro-current control circuit 24 includes a pulse generation module 241, a current adjustment module 242, and a current limiting protection module 243 connected in sequence. The pulse generation module 241 is used to generate a pulse signal, the current adjustment module 242 is used to adjust the output current between the first output terminal and the second output terminal according to the pulse signal, and the current limiting protection module 243 is disposed on the output side of the current adjustment module 242 to limit the output current of the micro-current control circuit 24.

[0030] See Figure 4In some embodiments of the present invention, the output current of the micro-current control circuit 24 is an adjustable constant current in the range of 1μA to 2mA. When pulse current output is used, the frequency of the pulse current is 1Hz to 100Hz; in another output state, the micro-current control circuit 24 outputs DC current. The current limiting protection module 243 limits the output current of the micro-current control circuit 24 to no more than 2mA.

[0031] See Figure 1 and Figure 2 In some embodiments of the present invention, the micro disposable battery 23 is selected from zinc-air batteries, thin-film lithium batteries, and lithium manganese button batteries, and the nominal voltage of the micro disposable battery 23 is 1.4V or 3V. The appropriate type and nominal voltage of the micro disposable battery 23 can be selected according to the size of the circular patch body 2, the required output voltage, and the working time.

[0032] In some embodiments of the present invention, the circular patch body 2 further includes an insulating separator 26, which also serves as a power supply activation pull tab and is removably disposed between the contacts of the micro disposable battery 23 and the micro current control circuit 24. When the insulating separator 26 is not removed, it separates the contacts of the micro disposable battery 23 from the micro current control circuit 24, thereby cutting off the power supply circuit between them; when in use, the insulating separator 26 is removed, so that the contacts of the micro disposable battery 23 are electrically connected to the micro current control circuit 24, thereby connecting the power supply circuit.

[0033] See Figure 1 and Figure 2 In some embodiments of the present invention, the diameter of the circular patch body 2 is 20mm to 40mm, and the thickness is 2mm to 4mm. The insulating shell 21 is made of medical-grade TPU material or medical-grade ABS material, that is, the insulating shell 21 can be made of medical-grade TPU material or medical-grade ABS material.

[0034] In one specific embodiment, the needle body 1 has a length of 25 mm and a diameter of 0.30 mm, the circular patch body 2 has a diameter of 30 mm and a thickness of 4 mm, the micro disposable battery 23 is a lithium manganese button battery with a nominal voltage of 3V, and the micro current control circuit 24 outputs a pulse current of 100 μA with a frequency of 2 Hz. When the needle body 1 pierces human tissue and the annular return electrode 29 is in contact with the skin, the current forms a closed path through the needle body 1, human tissue, and annular return electrode 29.

[0035] In another specific embodiment, the needle body 1 has a length of 5mm and a diameter of 0.18mm, the circular patch body 2 has a diameter of 20mm and a thickness of 2mm, the micro disposable battery 23 is a zinc-air battery with a nominal voltage of 1.4V, and the micro current control circuit 24 outputs a DC current of 10μA.

[0036] In another specific embodiment, the needle body 1 has a length of 40mm and a diameter of 0.35mm, the circular patch body 2 has a diameter of 40mm and a thickness of 4mm, the micro disposable battery 23 adopts a thin-film lithium battery, and the micro current control circuit 24 outputs a pulse current, the frequency of which is adjustable in the range of 1Hz to 100Hz.

[0037] like Figure 1 As shown, Figure 1 The main components of the acupuncture patch are shown in dissection. An insulating shell 21 is located on the side of the circular patch body 2 facing away from the skin. A micro-disposable battery 23 and a micro-current control circuit 24 are disposed within the insulating shell 21 and located to the side of the central channel. A conductive interface 25 on the patch side is disposed within the central channel. A pressure-sensitive adhesive layer 22 is located on the skin side of the circular patch body 2. An insulating insulating film 26 is a removable power activation pull tab, with its insulating portion inserted between the contacts of the battery 23 and the corresponding contacts of the micro-current control circuit 24. The operating end extends out of the insulating shell 21. The needle body 1 includes a needle tip 11, a needle body trunk 12, and a needle tail conductive interface 13, with the needle tip 11 facing the skin side. Figure 1 The disassembly relationship of the main components is emphasized. The location and shape of the annular reflux electrode 29 are shown in [reference needed]. Figure 2 .

[0038] like Figure 2 As shown, the central region of the circular patch body 2 has a central channel corresponding to the patch-side conductive interface 25. The micro disposable battery 23 and the micro current control circuit 24 are disposed inside the insulating shell 21 and avoid the central channel. The annular return electrode 29 is disposed on the skin-side outer periphery of the circular patch body 2 and surrounds the central channel. Figure 2 (a) shows the positional relationship of the patch-side conductive interface 25, the micro disposable battery 23, the annular return electrode 29, the indicator light 27, and the micro lever 28 in the circular patch body 2; Figure 2 (b) shows the positional relationship of the needle body 1 through the central channel, the insulating shell 21, the pressure-sensitive adhesive layer 22, the micro disposable battery 23, the micro current control circuit 24, the patch-side conductive interface 25, and the annular return electrode 29 along the thickness direction of the circular patch body 2.

[0039] like Figure 3 As shown, the needle-tail conductive interface 13 can be detachably connected to the patch-side conductive interface 25. Figure 3 (a) shows the connection relationship between the pin tail conductive interface 13 and the patch side conductive interface 25; Figure 3 (b) shows the relationship between the first magnet 131 and the second magnet 251, which are magnetically attracted to each other and form a conductive connection. Figure 3This diagram is for illustrative purposes only, showing a partial connection between two conductive interfaces. The orientation shown does not limit the actual orientation of pin 1. For the actual orientation of pin 1, please refer to [link to relevant documentation]. Figure 2 (b) and Figure 5 (b) in the middle.

[0040] like Figure 4 As shown, the miniature disposable battery 23 is electrically connected to the microcurrent control circuit 24. The microcurrent control circuit 24 includes a pulse generation module 241, a current regulation module 242, and a current limiting protection module 243, which are connected in sequence. The microcurrent control circuit 24 has a first output terminal and a second output terminal. The first output terminal is connected in sequence to the patch-side conductive interface 25, the needle tail conductive interface 13, and the needle body trunk 12. The needle body trunk 12 forms a conductive path with the annular return electrode 29 through the needle tip 11 and human tissue. The annular return electrode 29 is connected to the second output terminal of the microcurrent control circuit 24, thereby forming a complete closed current path.

[0041] like Figure 5 As shown, Figure 5 (a) shows the location of acupoint P on the human body. Figure 5 (b) shows the usage state where the circular patch body 2 is attached to the skin surface S and the needle body 1 is inserted into the deep muscle M from the skin surface S. Bone or deep tissue is indicated by B. Figure 5 The vertical arrow in the diagram indicates the insertion direction of needle body 1, and the dashed arc below needle body 1 indicates the tissue stimulation area corresponding to needle body 1, but does not indicate the unidirectional flow direction of the stimulation current. The closed current path through needle body 1, human tissue, and annular return electrode 29 is formed according to the electrical connection relationship described above in the instruction manual.

[0042] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. Furthermore, specific examples have been used in the specification to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for helping to understand the technical solutions and core ideas of the present invention, and the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A disposable self-powered acupuncture patch integrating microcurrent stimulation, characterized in that, It includes a needle body (1) and a circular patch body (2); The needle body (1) includes a needle tip (11), a needle body main body (12), and a needle tail conductive interface (13). The circular patch body (2) includes an insulating shell (21), a pressure-sensitive adhesive layer (22), a micro disposable battery (23), a micro current control circuit (24), a patch-side conductive interface (25), and an annular return electrode (29). The pressure-sensitive adhesive layer (22) is disposed on the skin side of the circular patch body (2). The circular patch body (2) has a central channel, the needle body (1) passes through the central channel, the needle tip (11) extends from the skin side of the circular patch body (2), and the needle tail conductive interface (13) is detachably electrically connected to the patch side conductive interface (25). The micro disposable battery (23) is electrically connected to the micro current control circuit (24). The micro current control circuit (24) has a first output terminal and a second output terminal. The first output terminal is electrically connected to the main body of the needle body (12) via the patch side conductive interface (25) and the needle tail conductive interface (13) in sequence. The second output terminal is electrically connected to the annular return electrode (29). The annular reflux electrode (29) is disposed on the skin side of the circular patch body (2) and surrounds the central channel. The annular reflux electrode (29) and the needle body (1) are electrically insulated inside the circular patch body (2) so as to form a closed current path through the needle body (1), the human tissue and the annular reflux electrode (29) when the needle body (1) pierces the human tissue and the annular reflux electrode (29) contacts the skin.

2. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The needle body (1) is made of medical stainless steel, or the needle body (1) includes a needle body substrate and a conductive layer disposed on the surface of the needle body substrate; The diameter of the needle body (1) is 0.18mm to 0.35mm, and the length is 5mm to 40mm.

3. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The needle-tail conductive interface (13) is provided with a first magnet (131) that also serves as a conductive contact, and the patch-side conductive interface (25) is provided with a second magnet (251) that also serves as a conductive contact. The first magnet (131) and the second magnet (251) are magnetically attracted to each other and electrically connected. In the assembly state where the first magnet (131) and the second magnet (251) are naturally magnetically attached, the contact resistance between the needle tail conductive interface (13) and the patch side conductive interface (25) is less than 1Ω.

4. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The micro disposable battery (23) and the micro current control circuit (24) are disposed inside the insulating shell (21), the patch side conductive interface (25) is disposed inside the central channel, the pressure-sensitive adhesive layer (22) and the annular reflux electrode (29) are disposed on the skin side of the circular patch body (2), and the annular reflux electrode (29) is located on the outer periphery of the circular patch body (2).

5. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The annular reflux electrode (29) is an annular metal electrode, and the annular conductive surface of the annular reflux electrode (29) is exposed on the skin side of the circular patch body (2). An insulating isolator is provided in the central channel. The insulating isolator is an insulating sleeve or an insulating bushing. The needle body (1) is fitted with the insulating isolator with a clearance. The insulating isolator, the extension of the insulating shell (21), and the insulating substrate of the pressure-sensitive adhesive layer (22) together isolate the needle body (1) from the annular return electrode (29).

6. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The microcurrent control circuit (24) includes the following components connected in sequence: A pulse generation module (241) is used to generate pulse signals; The current regulation module (242) is used to regulate the output current between the first output terminal and the second output terminal; The current limiting protection module (243) is used to limit the output current.

7. The disposable self-powered acupuncture patch according to claim 6, characterized in that, The output current is an adjustable constant current in the range of 1μA to 2mA; The output of the microcurrent control circuit (24) is a pulse current or DC current with a frequency of 1Hz to 100Hz, and the current limiting protection module (243) limits the output current to no more than 2mA.

8. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The micro disposable battery (23) is selected from one of zinc-air batteries, thin-film lithium batteries and lithium manganese button batteries, and the nominal voltage of the micro disposable battery (23) is 1.4V or 3V.

9. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The circular patch body (2) also includes an insulating isolation film (26), which also serves as a power supply activation pull tab and is removably disposed between the contacts of the micro disposable battery (23) and the micro current control circuit (24). When the insulating membrane (26) is not removed, it isolates the power supply circuit between the micro disposable battery (23) and the micro current control circuit (24). When it is removed, it makes the contacts of the micro disposable battery (23) electrically connected to the micro current control circuit (24).

10. The disposable self-powered acupuncture patch according to claim 1, characterized in that, The diameter of the circular patch body (2) is 20mm to 40mm and the thickness is 2mm to 4mm; The insulating shell (21) is made of medical-grade TPU material or medical-grade ABS material.

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