Bioelectric electrode pads

Abstract

A bioelectric electrode pad includes a moisturizing component, a conductive component, and a fixing component. The moisturizing component includes a sealing cap and an absorbent filler. The sealing cap protrudes upwards in the center, forming a first cavity with one open end. The absorbent filler is housed in the first cavity. The conductive component includes an electrode, a sealing connector, a thin-film circuit, and a shielding sheet. The electrode protrudes upwards in the center, forming a second cavity with one open end. The electrode contacts the absorbent filler, and the protruding portion of the electrode is housed in the first cavity. The sealing connector is disposed at the open end of the electrode to seal the second cavity. One end of the thin-film circuit is connected to the sealing connector to form a conductive path. One end of the shielding sheet has a first through-hole, and the shielding sheet is fitted onto the protruding portion of the electrode through the first through-hole. The fixing component is connected to the conductive component and used to fix the conductive component to the surface of the body to be tested. The sealing cap is fixed to the shielding sheet, and the shielding sheet is connected to and covers the thin-film circuit. This application improves the storage period and usage period of the electrode.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and more specifically, to a bioelectric electrode sheet. Background Technology

[0002] In the medical field, the diagnosis of heart disease relies on the long-term, stable acquisition of bioelectrical signals. Electrode pads are used to monitor the bioelectrical signals of the user's body surface within the electrocardiogram (ECG) monitoring device.

[0003] The inventors of this application have discovered that currently available electrode pads generally use an electrolyte and hydrogel matrix, supplemented with moisturizing and preservative ingredients as a conductive layer, and the application time is limited to no more than 24 hours. After the electrode pad exceeds its effective period, the adhesion and signal acquisition performance will significantly decrease. Furthermore, gel electrodes may cause skin allergies in users. Meanwhile, existing dry fabric electrodes rely on a fiber layer to contact the surface of the body being tested. When the surface is dry, this can lead to increased impedance and signal distortion. Moreover, slight displacement of the electrode can cause changes in the contact pressure between the electrode and the surface of the body being tested, resulting in abrupt changes in impedance and signal jumps.

[0004] The content in the background section is merely technology known to the public and does not necessarily represent existing technology in this field. Utility Model Content

[0005] This application aims to provide a bioelectric electrode sheet to solve at least one of the above-mentioned technical problems.

[0006] According to one aspect of this application, a bioelectric electrode pad is provided, comprising a moisturizing component, a conductive component, and a fixing component. The moisturizing component includes a sealing cap and an absorbent filler. The sealing cap protrudes upwards in the middle, forming a first cavity with one open end. The absorbent filler is accommodated in the first cavity for filling with a moisturizing solution. The conductive component includes an electrode, a sealing connector, a thin-film circuit, and a shielding sheet. The electrode protrudes upwards in the middle, forming a second cavity with one open end, the electrode contacting the absorbent filler, and the protruding portion of the electrode being accommodated in the first cavity. The sealing connector is disposed at the open end of the electrode to seal the second cavity. One end of the thin-film circuit is connected to the sealing connector to form a conductive path. One end of the shielding sheet has a first through-hole, and the shielding sheet is fitted onto the protruding portion of the electrode through the first through-hole. The fixing component is connected to the conductive component for fixing the conductive component to the surface of the body to be tested. The sealing cap is fixed to the shielding sheet, and the shielding sheet is connected to and covers the thin-film circuit.

[0007] According to some embodiments of this application, the second cavity is filled with an antibacterial filler.

[0008] According to some embodiments of this application, the conductive component further includes an electrical connector. The electrical connector is disposed at the other end of the thin-film circuit for connecting to an external power acquisition device.

[0009] According to some embodiments of this application, the shape of the shielding sheet matches the shape of the thin-film circuit, and the size of the shielding sheet is larger than the size of the thin-film circuit.

[0010] According to some embodiments of this application, the fixing component includes a first electrode patch and a second electrode patch. The first electrode patch is fixed to the side of the thin-film circuit facing away from the electrode, and one end of the first electrode patch is connected to the other end of the thin-film circuit via an electrical connector. One end of the second electrode patch is fixed to a first preset area of ​​the shielding sheet, and the other end is used to fix it to the surface of the body to be tested.

[0011] According to some embodiments of this application, the fixing assembly further includes a first isolation plate and a second isolation plate. The first isolation plate is disposed between the sealing cover and the shielding plate, and the first isolation plate has a second through hole, the edge of the second through hole being at a predetermined distance from the edge of the first through hole. The second isolation plate is fixed to a second predetermined area of ​​the second electrode patch.

[0012] According to some embodiments of this application, the conductive component further includes a microneedle assembly. The microneedle assembly is disposed in the second cavity. The microneedle assembly includes a support and microneedles. The microneedles are disposed in the support, pass through the electrode, and are used to fix them to the surface of the body to be tested.

[0013] According to some embodiments of this application, the height of the microneedles does not exceed 500 micrometers.

[0014] According to some embodiments of this application, the microneedles are hook-shaped, thread-shaped, or serrated.

[0015] Beneficial effects

[0016] This application utilizes a centrally protruding sealing cap to form a semi-sealed first cavity, which, in conjunction with the containment of absorbent filler, provides continuous humidification to the electrode during transportation and storage. The protruding portion of the electrode is embedded in the first cavity and contacts the absorbent filler, enabling automatic supply of humidifying solution. No additional humidification is required during use, significantly improving the storage time and clinical convenience of the bioelectric electrode pad. A shielding sheet, through a first through-hole, is fitted onto the protruding portion of the electrode, covering the thin-film circuit, enhancing insulation, and preventing direct contact between the thin-film circuit and the human body. The sealing cap and sealing connector seal the first and second cavities respectively, improving the structural stability of the bioelectric electrode pad during long-term storage and transportation, and extending the humidification time. This prevents signal distortion due to increased impedance caused by low humidity during use. Furthermore, the humidifying component is removed and discarded before application to the skin, reducing the size and weight of the bioelectric electrode pad and improving wearing comfort. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 An exploded view of the bioelectrode sheet structure according to an embodiment of this application is shown;

[0019] Figure 2 A schematic diagram of the structure of a bioelectrode sheet according to an embodiment of this application is shown;

[0020] Figure 3 This illustration shows another structural schematic diagram of the bioelectric electrode sheet according to an embodiment of this application;

[0021] Figure 4 A frontal view of the bioelectric electrode pad with the moisturizing component not removed, according to an embodiment of this application, is shown.

[0022] Figure 5 A schematic diagram of the back side of the bioelectric electrode pad in this embodiment is shown;

[0023] Figure 6 This illustration shows a schematic diagram of a hook-shaped microneedle component in an embodiment of this application.

[0024] Figure 7 This illustration shows a schematic diagram of a microneedle assembly with a threaded microneedle shape, according to an embodiment of this application.

[0025] Figure 8 This illustration shows a schematic diagram of the microneedle assembly fixed within the second cavity according to an embodiment of this application.

[0026] Figure 9 This is a frontal view of the bioelectric electrode patch according to an embodiment of this application after the moisturizing component has been removed.

[0027] Explanation of reference numerals in the attached figures:

[0028] Moisturizing component 1; conductive component 2; fixing component 3; sealing cap 11; water-absorbing filler 12; first cavity 111; electrode 21; sealing connector 22; thin film circuit 23; shielding sheet 24; electrical connector 25; microneedle assembly 26; second cavity 211; first through hole 241; antibacterial filler 212; first electrode patch 31; second electrode patch 32; first isolation sheet 33; second isolation sheet 34; second through hole 331; support base 261; microneedle 262; stepped structure 2611. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0030] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0031] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0032] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.

[0033] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] According to one aspect of this application, a bioelectric electrode sheet is provided. Figure 1 An exploded view of the bioelectrode structure according to an embodiment of this application is shown. Figure 2 A schematic diagram of the structure of a bioelectrode sheet according to an embodiment of this application is shown. Figure 3 This illustration shows another structural schematic diagram of the bioelectric electrode sheet according to an embodiment of this application. Figure 4 A frontal view of the bioelectric electrode pads of an embodiment of this application with the moisturizing component not removed is shown. Figure 5 A schematic diagram of the back side of the bioelectric electrode sheet of this embodiment is shown.

[0035] According to the example embodiment, such as Figure 1-5 As shown, the bioelectric electrode pad includes a moisturizing component 1, a conductive component 2, and a fixing component 3. The moisturizing component 1 includes a sealing cap 11 and an absorbent filler 12. The sealing cap 11 protrudes upward in the middle, forming a first cavity 111 with one end open. The absorbent filler 12 is housed in the first cavity 111 and is used to fill it with a moisturizing solution.

[0036] For example, the sealing cap 11 can be made of plastic, and the absorbent filler 12 can be a substance with water-absorbing properties, which can be filled with a moisturizing liquid. Exemplarily, the moisturizing liquid can be at least one of water, saline solution, hyaluronic acid solution, and sodium hyaluronate solution. Exemplarily, the absorbent filler 12 can be a cylinder with a diameter of 12.5-14.5 mm and a height of 3 mm, to contact the electrode 21.

[0037] The conductive component 2 includes an electrode 21, a sealing connector 22, a thin-film circuit 23, and a shielding sheet 24. The electrode 21 protrudes upwards from its center, forming a second cavity 211 with one open end. The electrode 21 contacts the absorbent filler 12, and the protruding portion of the electrode 21 is housed within the first cavity 111. The sealing connector 22 is disposed at the open end of the electrode 21 to seal the second cavity 211. One end of the thin-film circuit 23 is connected to the sealing connector 22 to form a conductive path. One end of the shielding sheet 24 has a first through-hole 241, through which the shielding sheet 24 is fitted onto the protruding portion of the electrode. A fixing component 3 is connected to the conductive component 2 and is used to fix the conductive component 2 to the surface of the object to be tested (not shown in the figure). The sealing cap 11 is fixed to the shielding sheet 24, and the shielding sheet 24 is connected to and covers the thin-film circuit 23.

[0038] For example, during storage and transportation, the moisturizing component 1 and the conductive component 2 are connected. The moisturizing component 1 can slowly permeate moisturizing liquid into the electrode 21 through the water-absorbing filler 12 in the sealing cap 11, so that the electrode 21 can remain moist for a long time. When using the bioelectric electrode, the moisturizing component 1 is removed, and the conductive component 2 is fixed to the surface of the body to be tested by the fixing component 3.

[0039] For example, the sealing connector 22 can be a conductive film with conductive properties. Exemplarily, the conductive film can be a conductive hot melt adhesive, which can be made by filling the hot melt adhesive with silver conductive filler. For example, the conductive film can also be a conductive self-adhesive.

[0040] For example, the thin-film circuit 23 can be a flexible conductive layer formed by printing a conductive material onto a flexible thin-film substrate. Exemplarily, the flexible thin-film substrate can be one of a 0.05-0.15 mm thick TPU (thermoplastic polyurethane elastomer), PU (polyurethane), PET (polyethylene terephthalate), PE (polyethylene), and PVC (polyvinyl chloride) film. The circuit is formed by printing a conductive paste.

[0041] For example, the shielding sheet 24 can be a double-sided adhesive film with an impermeable film substrate. Exemplarily, the shielding sheet 24 can be connected to the electrode 21 using waterproof hot melt adhesive. The side of the shielding sheet 24 that contacts the surface of the body to be tested can be coated with medical pressure-sensitive adhesive. When the bioelectric electrode is applied to the surface of the body to be tested, the shielding sheet 24 forms a closed space around the electrode 21, preventing moisture loss from the electrode 21 and creating an internal circulation of moisture, thus maintaining a low impedance state between the electrode 21 and the skin.

[0042] Through the above embodiments, this application forms a semi-sealed first cavity with a centrally protruding sealing cap, which, together with the absorbent filler, provides continuous humidification to the electrode during transportation and storage. The protruding part of the electrode is embedded in the first cavity and contacts the absorbent filler, enabling automatic supply of moisturizing solution. No additional humidification is required during use, significantly improving the storage time and clinical convenience of the bioelectric electrode pad. A shielding sheet is fitted onto the protruding part of the electrode through a first through-hole, covering the thin-film circuit, strengthening insulation, and preventing the thin-film circuit from directly contacting the human body. The sealing cap and sealing connector seal the first and second cavities respectively, improving the structural stability of the bioelectric electrode pad during long-term storage and transportation, and increasing the humidification time of the bioelectric electrode pad. This avoids signal distortion due to increased impedance caused by low humidity during use. Furthermore, the moisturizing component is removed and discarded before the bioelectric electrode pad is applied to the skin, reducing the size and weight of the main body of the bioelectric electrode pad and improving wearing comfort.

[0043] According to the example embodiment, electrode 21 is a silver fiber electrode. For example, the material of electrode 21 can also be one of the following: silver-plated fabric, metal-coated fabric (e.g., gold-plated fabric, nickel-plated fabric, and stainless steel fabric), carbon-based fabric (e.g., carbon black / carbon nanotube composite fabric, graphene fabric, etc.), and composite conductive fabric (e.g., metal fiber and polymer fiber blended fabric, carbon-based material and polymer composite fabric, etc.).

[0044] For example, the upward-protruding portion in the middle of the silver fiber electrode can be a cylinder. Exemplarily, the diameter of the cylinder can be 10-15 mm, and the height can be 1.5-3 mm.

[0045] Through the above embodiments, this application improves the conductivity and antibacterial effect of the bioelectric electrode by setting the electrode as a silver fiber electrode, utilizing the high conductivity of silver fibers and the antibacterial properties of the silver ions they contain. Furthermore, the silver fiber electrode can avoid causing skin allergies in users, thereby improving the user experience.

[0046] According to the example embodiment, such as Figure 1-3 As shown, the second cavity 211 is filled with an antibacterial filler 212. For example, the antibacterial filler 212 can be antibacterial cotton. Exemplarily, the antibacterial cotton can be foam (e.g., polyurethane foam, polyolefin foam, rubber foam) with at least one of the following components added: 0.1%-2% silver ions, polyhexamethylene biguanide (PHMB), chlorhexidine gluconate, and dipotassium glycyrrhizate.

[0047] Through the above embodiments, this application further improves the antibacterial effect of the bioelectric electrode sheet by filling the second cavity of the electrode with an antibacterial filler. Furthermore, the antibacterial filler can provide three-dimensional support for the interior of the electrode, thereby improving the structural and morphological stability of the bioelectric electrode sheet and preventing deformation due to compression from affecting the acquisition of bioelectric signals.

[0048] According to the example embodiment, such as Figure 1 As shown, the conductive component 2 also includes an electrical connector 25. The electrical connector 25 is disposed at the other end of the thin-film circuit 23 and is used to connect an external power acquisition device (not shown in the figure).

[0049] For example, the electrical connector 25 may be a metal male thread.

[0050] Through the above embodiments, this application realizes the connection of conductive components to external power acquisition devices by setting electrical connectors. The electrical connectors and external power acquisition devices are plug-and-play, which facilitates the quick separation of electrodes from acquisition devices (e.g., in the case of electrode replacement).

[0051] According to the example embodiment, such as Figure 1 As shown, the shape of the shielding sheet 24 matches the shape of the thin film circuit 23, and the size of the shielding sheet 24 is larger than the size of the thin film circuit 23.

[0052] Through the above embodiments, this application ensures that the shielding sheet can completely cover the thin film circuit by setting the shape of the shielding sheet to match the shape of the thin film circuit, and the size of the shielding sheet is larger than the size of the thin film circuit, thereby strengthening the insulation and preventing the thin film circuit from directly contacting the human body.

[0053] According to the example embodiment, such as Figure 1As shown, the fixing component 3 includes a first electrode patch 31 and a second electrode patch 32. The first electrode patch 31 is fixed to the side of the thin film circuit 23 opposite to the electrode 21, and one end of the first electrode patch 31 is connected to the other end of the thin film circuit 23 through an electrical connector 25. One end of the second electrode patch 32 is fixed to a first preset area of ​​the shielding sheet 24, and the other end is used to fix it to the surface of the body to be tested.

[0054] For example, both the first electrode patch 31 and the second electrode patch 32 can be medical nonwoven fabric coated with a low-sensitivity pressure-sensitive adhesive. The first preset area can be the area of ​​the shielding sheet 24 connected to the electrical connector 25 and used to contact the surface of the body to be tested.

[0055] Through the above embodiments, this application improves the stability of the thin-film circuit by fixing the first electrode patch to the back of the thin-film circuit and connecting the thin-film circuit and the first electrode patch through an electrical connector, thereby reducing the displacement of the thin-film circuit due to limb movement. Furthermore, by combining the second electrode patch to fix the conductive components to the surface of the body being tested, the risk of bioelectric electrode detachment is further reduced.

[0056] According to the example embodiment, such as Figure 1 and Figure 3 As shown, the fixing assembly 3 also includes a first isolation plate 33 and a second isolation plate 34. The first isolation plate 33 is disposed between the sealing cover 11 and the shielding plate 24, and the first isolation plate 33 has a second through hole 331, the edge of the second through hole 331 being at a predetermined distance from the edge of the first through hole 241. The second isolation plate 34 is fixed to the second predetermined area of ​​the second electrode pad 32.

[0057] For example, both the first insulating sheet 33 and the second insulating sheet 34 can be insulating paper. Exemplarily, the insulating paper can be made of kraft paper or parchment substrate treated with silicone oil or a coating. For example, the preset distance can be 2-3 mm. The second preset area can be the area of ​​the second electrode patch 32 opposite to the shielding sheet 24.

[0058] Through the above embodiments, this application isolates and protects the shielding sheet by setting a first insulating sheet, and isolates and protects the second electrode patch by setting a second insulating sheet. This improves the preservation period of the bioelectric electrode patch.

[0059] Figure 6 A schematic diagram of the microneedle assembly of this application is shown, in which the microneedles are hook-shaped. Figure 7 The diagram shows a threaded structure of the microneedle assembly of the present application embodiment. Figure 8 This illustration shows a schematic diagram of a microneedle assembly fixed within a second cavity according to an embodiment of this application. According to an example embodiment, such as… Figure 1 , Figure 3 , Figure 6 , Figure 7and Figure 8 As shown, the conductive component 2 also includes a microneedle component 26. The microneedle component 26 is disposed in the second cavity 211. The microneedle component 26 includes a support 261 and a microneedle 262. The microneedle 262 is disposed in the support 261, passes through the electrode 21, and is used to fix it to the surface of the body to be tested.

[0060] For example, the microneedle 262 can be made of metal. Exemplarily, the microneedle 262 is made of stainless steel or titanium alloy. For example, the support 261 has a stepped structure 2611 protruding from its center. Both the bottom of the support 261 and the stepped structure 262 are cylindrical, and the diameter of the stepped structure 2611 is smaller than the diameter of the bottom of the support 261. For example, the stepped structure 2611 can pass through the electrode 21 and be fixed to the electrode 21.

[0061] Through the above embodiments, this application improves the stability of the bioelectric electrode sheet fixed on the surface of the body by setting a microneedle assembly in the second cavity and fixing it to the surface of the body after the microneedles of the microneedle assembly pass through the electrode.

[0062] According to the example embodiment, the height of the microneedle 262 does not exceed 500 micrometers.

[0063] According to the example embodiment, the microneedle 262 is hook-shaped, thread-shaped, or serrated.

[0064] Through the above embodiments, by defining the structure of the microneedle as hook-shaped, thread-shaped, or sawtooth-shaped, the microneedle hooks onto the skin surface of the body to be tested more firmly, thereby inhibiting the transverse and longitudinal displacement of the bioelectric electrode pad on the body surface of the body to be tested, thus further improving the firmness of the bioelectric electrode pad fixed to the body surface of the body to be tested and improving the stability of the collected bioelectric signals.

[0065] Figure 9 This diagram shows a frontal view of the bioelectric electrode patch after the moisturizing component has been removed, according to an embodiment of this application. In an example embodiment, the antibacterial filler 212 is antibacterial cotton, which is a foam filled with at least one of the following components: 0.1%-2% silver ions, polyhexamethylene biguanide (PHMB), chlorhexidine gluconate, and dipotassium glycyrrhizate. Exemplarily, the foam can be one of polyurethane foam, polyolefin foam, and rubber foam.

[0066] Through the above embodiments, by specifying antibacterial filler as antibacterial cotton, which is foam filled with at least one of the following components: silver ions, polyhexamethylene biguanide (PHMB), chlorhexidine gluconate, and dipotassium glycyrrhizate, the antibacterial effect of the bioelectric electrode sheet is further improved by utilizing the antibacterial effect of silver ions.

[0067] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bioelectric electrode pad, characterized in that, include: Moisturizing components, including: The sealing cap protrudes upward in the middle, forming a first cavity with an opening at one end; An absorbent filler is placed in the first cavity, and the absorbent filler is used to fill a moisturizing liquid; Conductive components, including: An electrode protrudes upward from the middle to form a second cavity with one end open. The electrode contacts the absorbent filler and the protruding part of the electrode is housed in the first cavity. A sealing connector is disposed at the open end of the electrode to seal the second cavity; A thin-film circuit, one end of which is connected to the sealed connector to form a conductive path; A shielding sheet has a first through hole at one end, and the shielding sheet is sleeved on the protruding part of the electrode through the first through hole; A fixing component, connected to the conductive component, is used to fix the conductive component to the surface of the object to be tested; The sealing cap is fixed to the shielding sheet, and the shielding sheet is connected to and covers the thin-film circuit.

2. The bioelectric electrode sheet according to claim 1, characterized in that, The second cavity is filled with antibacterial filler.

3. The bioelectric electrode sheet according to claim 1 or 2, characterized in that, The conductive component also includes: An electrical connector is disposed at the other end of the thin-film circuit, and the electrical connector is used to connect an external power acquisition device.

4. The bioelectric electrode sheet according to claim 1 or 2, characterized in that, The shape of the shielding sheet matches the shape of the thin-film circuit, and the size of the shielding sheet is larger than the size of the thin-film circuit.

5. The bioelectric electrode sheet according to claim 3, characterized in that, The fixing component includes: The first electrode is fixed to the side of the thin film circuit facing away from the electrode, and one end of the first electrode is connected to the other end of the thin film circuit through the electrical connector. The second electrode is fixed at one end to the first preset area of ​​the shielding sheet, and at the other end to the surface of the body to be tested.

6. The bioelectric electrode sheet according to claim 5, characterized in that, The fixing component further includes: A first isolation plate is disposed between the sealing cover and the shielding plate. The first isolation plate has a second through hole, and the edge of the second through hole is at a predetermined distance from the edge of the first through hole. The second insulating sheet is fixed to the second preset area of ​​the second electrode patch.

7. The bioelectric electrode sheet according to claim 1, characterized in that, The conductive component further includes: The microneedle assembly, disposed in the second cavity, includes: Support base; Microneedles, disposed on the support base, pass through the electrode and are used to fix them to the surface of the body to be tested.

8. The bioelectric electrode sheet according to claim 7, characterized in that, The height of the microneedles does not exceed 500 micrometers.

9. The bioelectric electrode sheet according to claim 7 or 8, characterized in that, The microneedles are hook-shaped, spiral-shaped, or serrated.

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