CN220236890U - Electrode sheet for sticking to skin surface - Google Patents

Abstract

The utility model relates to an electrode sheet for application to the skin surface, comprising: the touch screen comprises a circuit substrate, a conductive coating, an insulating adhesive layer, a release film layer and an electrode connecting sheet, wherein the circuit substrate comprises a first surface and a second surface which are oppositely arranged, a circuit of the first surface comprises a plurality of electrode contacts, and when the electrode sheet is used, the first surface is close to the surface of skin; the conductive coating covers all of the electrode contacts; the insulating adhesive layer comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is arranged on the conductive coating, the second adhesive layer is arranged on the first surface in a region except the first adhesive layer, and the second adhesive layer is in direct contact with the first surface; the release film layer is arranged above the insulating adhesive layer; and the electrode connecting sheet is arranged on the second surface, and an electrode mounting part is arranged on the electrode connecting sheet and used for enabling the external electrode to be electrically connected with the electrode sheet through the electrode mounting part.

Description

Electrode sheet for sticking to skin surface

Technical Field

The utility model relates to the field of medical instruments and equipment, in particular to an electrode sheet for being stuck to the surface of skin.

Background

In recent years, brain-computer interface related technologies and applications thereof have been receiving widespread attention. A direct communication path between the human brain and external devices independent of the peripheral nerves and muscles can be established through the brain-computer interface. The brain-computer interface for electroencephalogram acquisition or nerve electrical stimulation has obvious practical significance in real life, and comprises sleep monitoring and management, driver vigilance assessment, exercise training, intelligent control and the like. Compared with the invasive brain-computer interface, the non-invasive brain-computer interface has the advantages of low cost, low risk, convenient operation and the like. With the development of technology, in non-invasive brain-computer interface applications, there is a growing demand for wearable electrodes that are in contact with the skin. The effective brain-computer interface requires the electrode to have low impedance, has the function of brain electricity acquisition/electric stimulation, and simultaneously meets the use requirements of light weight and simplicity. At present, the electrode in research or use often needs a complex wearing process and a complicated subsequent processing process, and meanwhile, the electrode has the problems of short service time and the like, so that the electrode cannot meet the daily application of long-time sleep monitoring management and the like.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an electrode plate which is low in impedance, light in weight, high in strength and durable and is used for being adhered to the surface of skin.

The technical scheme adopted by the utility model for solving the technical problems is an electrode sheet for being stuck on the surface of skin, comprising: the touch screen comprises a circuit substrate, a conductive coating, an insulating adhesive layer, a release film layer and an electrode connecting sheet, wherein the circuit substrate comprises a first surface and a second surface which are oppositely arranged, a circuit of the first surface comprises a plurality of electrode contacts, and when the electrode sheet is used, the first surface is close to the surface of skin; the conductive coating covers all of the electrode contacts; the insulating adhesive layer comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is arranged on the conductive coating, the second adhesive layer is arranged on the first surface in a region except the first adhesive layer, and the second adhesive layer is in direct contact with the first surface; the release film layer is arranged above the insulating adhesive layer; the electrode connecting sheet is arranged on the second surface, and an electrode mounting part is arranged on the electrode connecting sheet and used for enabling an external electrode to be electrically connected with the electrode sheet through the electrode mounting part.

In an embodiment of the present application, the conductive coating comprises a plurality of mutually independent conductive coating areas, each of the conductive coating areas corresponding to at least one of the electrode contacts.

In an embodiment of the present application, the first glue layer includes a plurality of first glue layer areas that are independent of each other, and the first glue layer areas are in one-to-one correspondence with the conductive coating areas.

In an embodiment of the present application, the electrode contacts include a first electrode contact serving as a current output end and a second electrode contact serving as a current input end, and an area of the first adhesive layer area covering the first electrode contact is not less than 8mm ² The area of the first adhesive layer area covering the second electrode contact is not less than 8mm ² 。

In an embodiment of the application, the circuit board further includes a fixing piece, and the circuit board includes a first fixing hole, and the fixing piece makes the electrode connection piece and the second surface be fixedly connected through the first fixing hole.

In an embodiment of the application, the electrode connecting piece further comprises a non-woven fabric layer, the non-woven fabric layer is arranged on the second face, the non-woven fabric layer comprises a second fixing hole, and the fixing piece is fixedly connected with the second face through the first fixing hole and the second fixing hole.

In one embodiment of the present application, the material of the conductive coating is graphite or silver paste.

In one embodiment of the present application, the first gel layer is a hydrogel.

In an embodiment of the present application, the second adhesive layer is a foam adhesive.

In an embodiment of the present application, a thickness of the first adhesive layer is greater than a thickness of the second adhesive layer.

In an embodiment of the present application, the electrode connecting sheet includes a hard fixing sheet and a soft adhesive sheet that are attached to each other, and the hard fixing sheet is located between the second face and the soft adhesive sheet.

In one embodiment of the present application, the hard fixing sheet is a polycarbonate film and the soft adhesive sheet is a polyurethane sheet.

According to the electrode slice, the conductive coating is added between the first adhesive layer and the circuit substrate, so that the usable time of the electrode slice is prolonged, and the electrolysis of the basic metal electrode of the circuit is effectively reduced; the first adhesive layer and the second adhesive layer which are good in adhesion performance, good in biocompatibility and low in impedance are selected, so that user experience is improved, and impedance is reduced; the electrode connection sheet made of polyurethane material is adopted to realize repeated adhesion between the electrode sheet and equipment, so that the electrode sheet has the advantages of low impedance, light weight, high durability and the like.

Drawings

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below, wherein:

FIG. 1 is a schematic view of an exploded structure of an electrode sheet according to an embodiment of the present application;

FIG. 2 is a schematic side view of the electrode pad of the embodiment of FIG. 1;

FIG. 3 is a schematic view of an exploded structure of an electrode sheet according to another embodiment of the present application;

FIG. 4 is a schematic side view of the electrode pad of the embodiment of FIG. 3;

FIG. 5 is a schematic view of an exploded structure of an electrode sheet according to yet another embodiment of the present application;

FIG. 6 is a schematic side view of the electrode pad of the embodiment of FIG. 5;

FIG. 7 is a schematic illustration of the results of a polyurethane sheet bonding shear test in an electrode sheet of the present application;

FIG. 8 is a schematic diagram of electrochemical impedance detection results for a 10-contact electrode pad;

FIG. 9 is a schematic diagram of electrochemical impedance detection results for a 3-contact electrode pad;

FIG. 10 is a schematic diagram of the results of an electrode resistance to electrolysis test.

Detailed Description

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than as described herein, and therefore the present utility model is not limited to the specific embodiments disclosed below.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application. Furthermore, although terms used in the present application are selected from publicly known and commonly used terms, some terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present application be understood, not simply by the actual terms used but by the meaning of each term lying within.

Hereinafter, embodiments of the present utility model will be described based on the drawings. However, the examples shown below are examples of electrode sheets for application to the skin surface for embodying the technical idea of the present utility model, and the electrode sheets for application to the skin surface of the present utility model are not particularly limited to the following. Further, in order to facilitate understanding of the scope of the claims, the numbers corresponding to the elements shown in the examples are given to the elements shown in the columns of "claims" and "summary of the utility model". However, the elements shown in the claims are by no means intended to be specific as elements of the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present utility model to those described herein unless specifically stated, but are merely illustrative examples.

However, the dimensions, positional relationships, and the like of the members shown in the drawings may be exaggerated for clarity. In the following description, the same names and symbols denote the same or similar members, and detailed description thereof is omitted. Further, each element constituting the present utility model may be a plurality of elements formed by the same member, and one member may also serve as a plurality of elements, or conversely, the functions of one member may be shared by a plurality of members. The contents described in some of the examples and embodiments may be applied to other examples and embodiments. In the present specification, "upper" is used not only in the case of being in contact with the upper surface but also in the case of being formed above in a spaced-apart manner, and also in the meaning of including a layer and a layer having an intervening layer therebetween.

The application of the electrode sheet for application to the skin surface of the present application includes attaching to the skin surface of a living body, collecting an electrical signal from the living body, or applying electrical stimulation to the living body. The organism is not limited to a human body, but may include an animal. The electrical signal can be various bioelectric signals such as brain electricity, electrocardio, myoelectricity and the like. The position of the electrode sheet may be any position of a living body. Preferably, the electrode sheet is an electrode sheet for electroencephalography and electrical stimulation, adapted in use to be applied to the skin of a human head.

Fig. 1 is an exploded view of an electrode sheet according to an embodiment of the present application. Fig. 2 is a schematic side view of the electrode pad of the embodiment shown in fig. 1. As shown in fig. 1 and 2, the electrode sheet 100 of this embodiment includes a circuit substrate 110, a conductive coating 120, an insulating adhesive layer, a release film 140, and an electrode connecting sheet. Fig. 1 is an exploded view, and when the respective elements are taken up to form the electrode sheet 100, the respective elements are basically taken up in sequence according to the positions shown in the exploded view, so that fig. 1 can be used in combination with fig. 2 to collectively describe the relative positional relationship between the respective elements.

Referring to fig. 1 and 2, the circuit substrate 110 includes a first surface 111 and a second surface 112 disposed opposite to each other, the first surface 111 being close to the skin surface when in use, and the second surface 112 being located on the back of the first surface 111, i.e. at a position facing away from the skin surface.

As shown in fig. 1, the circuit board 110 is substantially in the shape of a stadium. The illustration in fig. 1 is merely an example and is not intended to limit the shape and size of the circuit substrate 110. In other embodiments, the circuit substrate 110 may be of any other shape.

As shown in fig. 1, electrode contacts are indicated by black solid dots in the first face 111, and wires are indicated by solid lines. In this embodiment, there are 5 electrode contacts on the first face 111. The conductive coating 120 covers all of the electrode contacts. The conductive coating 120 is a thin layer applied to the first side 111 and has a thickness of about 0.2 mm.

Fig. 1 is not intended to limit the number and location distribution of electrode contacts. The shape and size of the conductive coating 120 are not limited in this application.

In some embodiments, the conductive coating 120 includes a plurality of mutually independent conductive coating regions, each conductive coating region corresponding to at least one electrode contact. As shown in fig. 1, wherein 3 conductive coating areas are respectively indicated by 3 larger circles, wherein the conductive coating area located in the middle covers 3 electrode contacts, and the 2 conductive coating areas located at both sides cover 1 electrode contact, respectively.

In some embodiments, the material of the conductive coating 120 is graphite.

In some embodiments, the material of the conductive coating 120 is silver paste.

The electrode plate adopts the conductive coating, so that the electrode plate has stronger tolerance to high voltage, the impedance change rate of the electrode plate is low under high voltage, the stability of the electrode plate is good, and the electrolysis of the metal electrode in the circuit substrate 110 can be effectively reduced.

As shown in fig. 1, the insulating adhesive layer includes a first adhesive layer 131 and a second adhesive layer 132, where the first adhesive layer 131 is disposed on the conductive coating 120, and the second adhesive layer 132 is disposed on the first surface 111 in a region other than the first adhesive layer 131, and the second adhesive layer 132 is in direct contact with the first surface 111.

As shown in fig. 1 and fig. 2, the second adhesive layer 132 may be formed by digging a hole in the film, where a portion corresponding to the conductive coating area is a hollowed-out structure. It should be noted that a positioning hole 133 may be formed therein, and the positioning hole 133 is used to perform positioning and alignment functions together with the positioning holes in the other layers. Accordingly, the first adhesive layer 131 is correspondingly filled in the hollow area of the second adhesive layer 132, so that the combined area of the first adhesive layer 131 and the second adhesive layer 132 is approximately equal to the total area of the first surface 111.

Since the region other than the region of the conductive coating is not coated with the conductive material on the first face 111, the second adhesive layer 132 is directly in contact with the ground 111.

In some embodiments, the first glue layer 131 is a hydrogel. The hydrogel has the characteristics of low impedance, adhesion and good biocompatibility, has good skin-friendly effect, and is suitable for long-time application on skin.

Similar to the conductive coating, the first glue layer 131 also includes a plurality of first glue layer regions independent of each other. As shown in fig. 1 and 2, the first adhesive layer 131 includes 3 first adhesive layer regions independent of each other, and each first adhesive layer region is isolated by the second adhesive layer 132 and is not communicated with each other. According to the design, the phenomenon of short circuit between the electrode contacts covered by different first adhesive layer areas can be avoided.

In some embodiments, the electrode contacts on the circuit substrate 110 include a first electrode contact as a current output terminal and a second electrode contact as a current input terminal, and the area of the first adhesive layer region covering the first electrode contact is not less than 8mm ² The area of the first adhesive layer region covering the second electrode contact is not less than 8mm ² . According to such an arrangement, good signal contact can be ensured.

In some embodiments, the second adhesive layer 132 is a foam. The foam rubber has the characteristics of good selective adhesion performance and good biocompatibility, and is suitable for helping the adhesion of the electrode plate and the skin.

In some embodiments, the second adhesive layer 132 is double sided adhesive.

Referring to fig. 2, in some embodiments, the thickness of the first adhesive layer 131 is greater than the thickness of the second adhesive layer 132. Since the thickness of the conductive coating 120 is extremely thin, the bottoms of the first and second adhesive layers 131 and 132 are almost flush, and when the thickness of the first adhesive layer 131 is greater than that of the second adhesive layer 132, the top surface of the first adhesive layer 131 is higher than that of the second adhesive layer 132. Through such setting, when using this electrode piece 100, can make electrode piece 100 mainly paste the skin through first glue film 131, because first glue film 131 has better skin effect, be favorable to improving user experience and feel to increase the length of time of use of electrode piece.

With reference to fig. 1 and 2, a release film 140 is further disposed above the insulating adhesive layer. One surface of the release film 140 facing the circuit substrate 110 is bonded to the insulating adhesive layer for protecting the insulating adhesive layer. The release film 140 has the property of being easily torn. In use, the release film 140 is torn to apply the layer of insulating adhesive to the skin.

In this embodiment, the shape and size of the release film 140 are consistent with the shape and size of the circuit substrate 110.

Referring to fig. 1 and 2, an electrode connection pad is further provided under the circuit substrate 110, and an electrode mounting portion is provided on the electrode connection pad for electrically connecting the external electrode to the electrode pad 100 through the electrode mounting portion. In the embodiment shown in fig. 1 and 2, the electrode connecting sheet includes a hard fixing sheet 141 and a soft adhesive sheet 142 that are attached to each other, and the hard fixing sheet 141 is located between the second face 112 and the soft adhesive sheet 142. The hard fixing sheet 141 is provided with an electrode mounting portion 143, the soft adhesive sheet 142 is provided with an electrode mounting portion 145, and the electrode mounting portions 143, 145 are corresponding to each other, i.e., the size, shape, and position are the same, and are all in the shape of a through hole. In the mounted state, the hard fixing sheet 141 and the soft adhesive sheet 142 are attached to each other, and the electrode mounting portions 143, 145 are aligned with each other to form a through hole so that the external electrode can be mounted in the electrode mounting portions 143, 145.

In some embodiments, the rigid fixing sheet is a polycarbonate film and the flexible adhesive sheet is a polyurethane sheet. Further, the thickness of the polycarbonate film was 0.38mm, which had a certain hardness, and acted as a fixing for the polyurethane sheet. The polyurethane sheet is soft in texture, has certain physical adhesion capability, can realize adhesion connection between the electrode sheet and external electrode equipment, and can be repeatedly bonded.

In some embodiments, the electrode connection pads may be adhesively secured to the second face 11 of the circuit substrate 110.

In some embodiments, the electrode sheet 100 further includes a fixing member (not shown), and the circuit substrate 110 includes a first fixing hole 113 thereon, and the fixing member can fixedly connect the electrode connecting sheet with the second surface 112 through the first fixing hole 113. The fixing piece is, for example: and (5) a screw.

As shown in fig. 1, the hard fixing piece 141 has a through hole 144, and the soft adhesive piece 142 has a through hole 146. The fixing member may sequentially pass through the through holes 146 and 144 and the first fixing hole 113, thereby fixedly connecting the electrolytic connecting sheet with the circuit substrate 110.

In some embodiments, electrode sheet 100 further comprises a nonwoven layer 150. As shown in fig. 1 and 5, the nonwoven fabric layer 150 is located below the second surface 112 of the circuit substrate 110, and serves to protect the second surface 112 of the circuit substrate 110. As shown in fig. 1, the nonwoven fabric layer 150 has a second fixing hole 151 corresponding to the through holes 144 and 146 for positioning and fixing. The fixing member sequentially passes through the through holes 146 and 144, the second fixing hole 151 and the first fixing hole 113 to fixedly connect the electrode connecting sheet with the second face 112.

Referring to fig. 1 and 2, the positions of the hard fixing sheet 141 and the soft adhesive sheet 142 that are bonded to each other are located approximately at the middle position of the circuit board 110. When the electrode sheet 100 is used, after the release film 140 is torn off, the first adhesive layer 131 and the second adhesive layer 132 are contacted with the skin, so that the electrode connecting sheet faces outwards, and at the moment, an external device, such as an external electrode of an electroencephalogram device or an electric stimulation device, is installed on an electrode installation part of the electrode connecting sheet, so that signal acquisition can be performed to acquire that electric stimulation is applied.

Fig. 3 is an exploded view of an electrode sheet according to another embodiment of the present application. Fig. 4 is a schematic side view of the electrode pad of the embodiment shown in fig. 3. As shown in fig. 3 and 4, the electrode sheet 200 of this embodiment includes a circuit substrate 210, a conductive coating 220, an insulating adhesive layer, a release film 240, and an electrode connecting sheet. The circuit substrate 210 includes a first face 211 and a second face 212.

Compared to the embodiment shown in fig. 1 and fig. 2, the embodiment shown in fig. 3 and fig. 4 has the following differences, for example, the shape and size of the circuit substrate 210 are different, the circuit structure is also different, the number and positions of the electrode contacts are also different, and therefore, the shape of the corresponding conductive coating 220 is different, the shape and number of the first glue layer regions included in the first glue layer 231 are also different, and the shape and the openings of the second glue layer 232 are also different. The shape, size, and hole conditions of the hard fixing piece 241 and the soft adhesive piece 242, which are bonded to each other, included in the electrode connecting piece are different. Other similar structures and functions may be described above with reference to the drawings and will not be expanded herein.

As shown in fig. 3, the second adhesive layer 232, the circuit substrate 210, the non-woven fabric layer 250, the hard fixing sheet 241 and the soft adhesive sheet 242 have 3 circular through holes, respectively, to perform positioning and fixing functions.

In the embodiment shown in fig. 3 and 4, the number of electrode contacts is greater, and the shapes of the first adhesive layer 231 and the second adhesive layer 232 are also more complex, so that the electrode device is suitable for external electrode devices with more channels.

Fig. 5 is an exploded view of an electrode sheet according to still another embodiment of the present application. Fig. 6 is a side view schematic of the electrode pad of the embodiment shown in fig. 5. As shown in fig. 5 and 6, the electrode sheet 300 of this embodiment includes a circuit substrate 310, a conductive coating 320, an insulating adhesive layer, a release film layer 340, and an electrode connecting sheet. The circuit substrate 310 includes a first face 311 and a second face 312.

The obvious difference in shape of this embodiment compared to the previously described embodiment is that the circuit substrate 310 has protruding contacts 313 therein, which contacts 313 are further from the body of the circuit substrate 310. As shown in fig. 6, a part of the structure including the contact 313 is bent and then positioned under the circuit substrate 310. In addition, the circuit board 31 has another contact 314 therein. Correspondingly, the second adhesive layer 332 has hollowed-out portions corresponding to the contacts 313 and 314, and the first adhesive layer 331 also includes first adhesive layer regions corresponding to the contacts 313 and 314, respectively.

In the embodiment shown in fig. 5, the electrode sheet 300 further includes a non-woven fabric layer 250 having a portion of a structure corresponding to the hard fixing piece 341 protruding and attached to the soft fixing piece 342.

As shown in fig. 5, the second adhesive layer 332, the circuit substrate 310, the non-woven fabric layer 350, the hard fixing sheet 341 and the soft adhesive sheet 342 have 3 circular through holes, respectively, to perform positioning and fixing functions.

In the installation, after the hard fixing sheet 341 is bent, the 3 through holes on the hard fixing sheet are aligned with the 3 through holes on the non-woven fabric layer 350.

The following takes an embodiment of the conductive coating as graphite, the first adhesive layer as hydrogel, the second adhesive layer as double-sided adhesive, and the electrode connecting sheet comprising a polyurethane sheet as an example, and describes the preparation process of the electrode sheet of the present application: manufacturing a circuit substrate according to the circuit design; covering a graphite pattern layer on a first surface of the circuit substrate at a portion contacted with the hydrogel according to design; assembling the cut double-sided adhesive tape on the first surface of the circuit substrate; covering the hydrogel on the graphite coating; attaching the cut non-woven fabric layer to the second surface of the circuit base; attaching the cut polyurethane sheet to the circuit interface of the second surface; and (3) attaching the prepared release film layer to the double-sided adhesive tape and the hydrogel surface to complete the assembly of the electrode plate.

The following tests prove that the electrode plate has low impedance, high strength and high electrolysis resistance.

(1) Polyurethane sheet adhesion shear force test

Principle of: the shear strength is a shear stress measured at the material bond by applying a tensile force parallel to the bond plane and in the direction of the sample principal axis.

The device comprises: the tensile testing machine (universal testing machine) and the clamp is a clamping type.

Sample: 2cm x 5cm of the shell substrate and 2cm x 5cm of the polyurethane sheet sample were cut, the protective film was removed before the test, and the adhesive surface was not stained during the test.

The steps are as follows: the polyurethane sheet is aligned and bonded with the long side of the shell substrate, and the bonding areas are respectively 1 cm, 2cm, 3 cm, 4 cm and 5cm ² . And respectively clamping one end of the polyurethane sheet and one end of the shell substrate on an upper clamp and a lower clamp of the universal testing machine. The distance from the clamping position to the bonding end is ensured to be consistent. The tensile machine was stretched at a constant stretching speed of 50 mm/min. The maximum load of shear failure of the test specimen was recorded as the failure load.

Results: the test sample results are expressed as the arithmetic mean of the breaking load (N) or tensile shear strength (MPa) of the effective test sample. Tensile shear strength (MPa) divided by breaking load (N) by shear area (mm) ² ) To calculate.

Fig. 7 is a schematic diagram of the results of the polyurethane sheet adhesion shear force test in the electrode sheet of the present application. Wherein the transverse axis is the bonding area, and the unit is cm ² The vertical axis is the shear stressThe unit is N. The results show that the shear strength of the polyurethane sheet and the substrate is 9.54+/-0.25x10 ^-2 And (3) Mpa. The polyurethane sheet is adopted to make the electrode sheet have higher strength.

(2) Electrochemical impedance detection of electrode pads

The device comprises: table digital bridge (VICTOR 4091A), 1KHz. A frequency of 1KHz was chosen for evaluation, as this is considered a common reference for nerve impedance analysis. Electrode sites are considered viable implant sites if their impedance values at 1KHz are less than 600kΩ.

Sample: 3-contact and 10-contact electrode plates.

The steps are as follows: the electrode plate is attached to a conductive metal plate (0.00012 omega, with very small impedance, negligible), and the test chucks are clamped on the metal plate and each contact, respectively. The impedance value is recorded. Each channel is used for measuring at least three groups of electrode slice effective data.

Results: the result is expressed in terms of the magnitude of the impedance value (Ω).

Fig. 8 is a schematic diagram of electrochemical impedance detection results for a 10-contact electrode pad. Fig. 9 is a schematic diagram of electrochemical impedance detection results for a 3-contact electrode pad. Wherein the horizontal axis represents the interface number, the vertical axis represents the impedance value, and the unit is Ω. Referring to fig. 8 and 9, although there is a difference in impedance value between channels due to the difference in hydrogel area corresponding to different contacts and the difference between batches, the impedance value of each channel is basically less than 500 Ω and is far lower than the requirement that the impedance of the electrode sheet is lower than 600kΩ, calculated as a whole.

(3) Electrode electrolysis resistance test

The device comprises: DC stabilized power supply and digital bridge.

Sample: graphite coating electrode slice and electrode slice without graphite coating.

The steps are as follows: measuring the path impedance R of each contact of the electrode plate by using a digital bridge ₀ After applying 12V voltage for 30min, the path impedance R of each contact of the electrode sheet was measured again.

Results: expressed as a rate of change of impedance, ((R-R) ₀ )/R ₀ )x100％

FIG. 10 is a schematic diagram of the results of an electrode resistance to electrolysis test. Wherein, the horizontal axis comprises two categories of no graphite coating and a graphite coating, the vertical axis is the impedance change rate, and the unit is%. Referring to fig. 10, the results show that the electrode sheet coated with the graphite coating layer can be more resistant to high voltage, and the resistance change rate of the electrode sheet without the graphite coating layer reaches about 255.55% at a high voltage of 12v for 30min for a long period of time, whereas the average resistance change rate of the electrode sheet coated with the graphite coating layer is only about 11.34%.

The test proves that the electrode plate has the advantages of low impedance, high strength, good electrolytic resistance and the like. In addition, the electrode plate has a simple structure and has the advantage of mass production.

While certain presently useful inventive embodiments have been discussed in the foregoing disclosure, by way of example, it is to be understood that such details are merely illustrative and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements included within the spirit and scope of the embodiments of the utility model. For example, while the system components described above may be implemented by hardware devices, they may also be implemented solely by software solutions, such as installing the described system on an existing server or mobile device.

Similarly, it should be noted that in order to simplify the description of the present disclosure and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are required by the subject utility model. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations in some embodiments for use in determining the breadth of the range, in particular embodiments, the numerical values set forth herein are as precisely as possible.

While the utility model has been described with reference to the specific embodiments presently, it will be appreciated by those skilled in the art that the foregoing embodiments are merely illustrative of the utility model, and various equivalent changes and substitutions may be made without departing from the spirit of the utility model, and therefore, all changes and modifications to the embodiments are intended to be within the scope of the claims of this application as long as they come within the true spirit of the utility model.

Claims (12)

1. An electrode sheet for application to a skin surface, comprising: the circuit substrate, the conductive coating, the insulating adhesive layer, the release film layer and the electrode connecting sheet, wherein,

the circuit substrate comprises a first surface and a second surface which are oppositely arranged, the circuit of the first surface comprises a plurality of electrode contacts, and when the electrode plate is used, the first surface is close to the surface of the skin;

the conductive coating covers all of the electrode contacts;

the insulating adhesive layer comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is arranged on the conductive coating, the second adhesive layer is arranged on the first surface in a region except the first adhesive layer, and the second adhesive layer is in direct contact with the first surface;

the release film layer is arranged above the insulating adhesive layer; and

the electrode connecting piece is arranged on the second surface, and an electrode mounting part is arranged on the electrode connecting piece and used for enabling an external electrode to be electrically connected with the electrode piece through the electrode mounting part.

2. The electrode pad of claim 1, wherein said conductive coating comprises a plurality of mutually independent conductive coating regions, each of said conductive coating regions corresponding to at least one of said electrode contacts.

3. The electrode pad of claim 2, wherein the first glue layer comprises a plurality of mutually independent first glue layer regions, the first glue layer regions being in one-to-one correspondence with the conductive coating regions.

4. An electrode sheet according to claim 3, wherein the electrode contacts include a first electrode contact as a current output terminal and a second electrode contact as a current input terminal, and the area of the first adhesive layer area covering the first electrode contact is not less than 8mm ² The area of the first adhesive layer area covering the second electrode contact is not less than 8mm ² 。

5. The electrode tab of claim 1, further comprising a fixing member including a first fixing hole on the circuit substrate, the fixing member fixedly connecting the electrode tab with the second face through the first fixing hole.

6. The electrode tab of claim 5, further comprising a nonwoven layer disposed on the second face, the nonwoven layer including a second securing aperture, the securing member fixedly connecting the electrode tab to the second face through the first securing aperture and the second securing aperture.

7. The electrode sheet of claim 1, wherein the material of the conductive coating is graphite or silver paste.

8. The electrode sheet of claim 1, wherein the first glue layer is a hydrogel.

9. The electrode pad of claim 1, wherein the second adhesive layer is a foam.

10. The electrode tab of claim 1 wherein the first glue layer has a thickness greater than a thickness of the second glue layer.

11. The electrode tab of claim 1 wherein the electrode attachment tab comprises a rigid anchor tab and a flexible adhesive tab that are attached to one another, the rigid anchor tab being located between the second face and the flexible adhesive tab.

12. The electrode sheet of claim 11, wherein the hard fixing sheet is a polycarbonate film and the soft adhesive sheet is a polyurethane sheet.