WO2020147555A1

WO2020147555A1 - Electroencephalogram electrode

Info

Publication number: WO2020147555A1
Application number: PCT/CN2019/129347
Authority: WO
Inventors: 韩璧丞; 林佳奇
Original assignee: 浙江强脑科技有限公司
Priority date: 2019-01-15
Filing date: 2019-12-27
Publication date: 2020-07-23
Also published as: CN209644892U

Abstract

An electroencephalogram electrode. The electroencephalogram electrode comprises a shell (10), hydrogel (20), and a signal transmission component (30). The shell (10) is provided in the shape of an arc; the shell (10) comprises an inner arc-shaped surface (101) and an outer arc-shaped surface (102) that are opposite to each other; the hydrogel (20) is provided at the inner arc-shaped surface (101) and extends along the length direction of the shell (10), and at least a part of the hydrogel (20) protrudes out of the inner arc-shaped surface (101) of the shell (10); the signal transmission component (30) is connected with the shell (10), and the signal transmission component (30) is electrically connected with the hydrogel (20) to output an electroencephalogram signal received by the hydrogel (20).

Description

EEG electrodes

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on January 15, 2019, with the application number of 201920065444.1 and the utility model name of "brain electrodes", the entire content of which is incorporated into the application by reference.

Technical field

This application relates to the technical field of EEG interfaces, and in particular to an EEG electrode.

Background technique

At present, electroencephalogram (EEG) signal acquisition tools generally use a metal microneedle electrode, which touches the dermis after piercing the epidermis of the skin with the microneedle, thereby reducing the impedance between the electrode and the skin and effectively collecting EEG signals. However, this type of electrode is a semi-invasive electrode, and the microneedles on the electrode pierce the skin, causing discomfort to the experiencer during use.

Technical solution

The main purpose of this application is to provide an EEG electrode, which aims to improve the wearing comfort of the EEG electrode.

To achieve the above objective, this application proposes an EEG electrode, the EEG electrode including;

The housing is arranged in an arc shape, and the housing has opposite inner and outer arc surfaces;

The hydrogel is arranged on the inner arc surface and extends along the length direction of the casing, and at least part of the hydrogel protrudes from the inner arc surface of the casing;

The signal transmission component is connected to the housing, and the signal transmission component is electrically connected to the hydrogel to output brain electrical signals received by the hydrogel.

Optionally, an installation groove is recessed on the inner arc surface of the housing, and the hydrogel is installed in the installation groove.

Optionally, the bottom surface of the mounting groove is provided with a through mounting hole, and the signal transmission component passes through the mounting hole and protrudes out of the outer arc surface of the housing.

Optionally, the signal transmission component includes a first conductive buckle provided on the outer arc surface, and a second conductive buckle provided on the inner arc surface, the second conductive buckle and the hydrogel Connection, the first conductive buckle has a clamping hole on the side facing the outer arc surface, the second conductive buckle has a clamping portion on the side facing the inner arc surface, and the clamping portion passes through the Mount the hole and snap to the card hole.

Optionally, a first positioning groove is formed on the outer arc surface, and at least part of the first conductive buckle is positioned and installed in the first positioning groove; and/or,

A second positioning groove is defined on the bottom surface of the installation groove, and at least part of the second conductive buckle is installed in the second positioning groove.

Optionally, a bayonet is provided on the bottom surface of the installation groove, and the bayonet is clamped with the side of the hydrogel facing the bottom surface of the installation groove.

Optionally, the mounting groove has two opposite inner side walls extending along the length direction of the housing;

A first positioning rib is protrudingly provided on the inner side wall, and the first positioning rib extends from the inner arc surface to the outer arc surface. The first positioning rib and the hydrogel Positioning connection, so that the hydrogel and the shell are positioned and matched; and/or,

The bottom surface of the installation groove is convexly provided with a second positioning rib, the second positioning rib extends along the arrangement direction of the two inner side walls, and the second positioning rib is positioned and connected with the hydrogel to The hydrogel and the shell are positioned and matched.

Optionally, a flange is provided on the outer side wall of the housing, the flange is located at the edge of the notch of the outer side wall close to the mounting groove, and the flange extends along the length direction of the housing .

Optionally, the number of the flanges is two, and the two flanges are distributed on opposite sides of the installation slot.

Optionally, two ends of the housing have connecting parts, and the two connecting parts are used for connecting with the two ends of the connecting belt.

Beneficial effect

This application uses hydrogel as the medium that contacts the human skin and collects EEG signals, which not only makes the human body feel more comfortable, but also can be used repeatedly. In addition, the shell of the EEG electrode is arranged in an arc shape, the dry hydrogel is arranged on the inner arc surface of the shell, and at least part of the hydrogel is protruded on the inner arc surface, which can make the EEG electrode and the human body The forehead is more fit, with the help of the connection around the back of the user’s head, the EEG electrode can be firmly attached to the user’s forehead, which increases the contact area between the hydrogel and the skin, thereby improving the detection and recording of the user’s EEG Signal ability.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of an embodiment of a housing and a signal transmission component of the present application;

Fig. 2 is a schematic structural diagram of an implementation of an EEG electrode according to this application;

Fig. 3 is another angle view of the housing in Fig. 1.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

It should be noted that all directional indicators (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the inter-components in a certain posture (as shown in the drawings) With respect to the relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions related to "first", "second", etc. in this application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the meaning of “and/or” appearing throughout the text is to include three parallel schemes, taking “A and/or B” as an example, including scheme A, or scheme B, or schemes satisfying both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to achieve. When the combination of technical solutions conflicts with each other or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the scope of protection required by this application.

This application proposes an EEG electrode.

1 and 2, the EEG electrode includes a housing 10, a hydrogel 20, and a signal transmission assembly 30. The housing 10 is arranged in an arc shape, and the housing 10 has opposite inner arc surfaces 101 and outer arcs. Surface 102; the hydrogel 20 is provided on the inner arc 101 and extends along the length of the housing 10, and at least part of the hydrogel 20 protrudes from the inner arc 101 of the housing 10; the signal transmission assembly 30 and the housing 10 And the signal transmission component 30 is electrically connected to the hydrogel 20 to output brain electrical signals received by the hydrogel 20. It is understandable that by using the hydrogel 20 as a medium that contacts the human skin and collects EEG signals, not only can the human body feel more comfortable, but it can also be used repeatedly. In addition, by making the case 10 of the EEG electrode arranged in an arc shape, the dry hydrogel 20 is arranged on the inner arc surface 101 of the case 10, and at least part of the hydrogel 20 protrudes from the inner arc surface 101, The EEG electrode can be more closely attached to the forehead of the human body. With the help of the connecting belt around the back of the user’s head, the EEG electrode can be firmly attached to the user’s forehead, which improves the effectiveness of the hydrogel 20 and the skin. The contact area improves the ability of the hydrogel 20 to detect and record user EEG signals.

Wherein, the hydrogel 20 can be directly arranged on the inner arc surface 101 of the casing 10, and at this time, the hydrogel 20 all extends out of the inner arc surface 101 of the casing 10. Or, as shown in FIGS. 2 and 3, the inner arc surface 101 of the housing 10 can be recessed to form an installation groove 103, and the hydrogel 20 can be installed in the installation groove 103, so that the hydrogel 20 and the housing The connection of 10 is more stable.

Optionally, a bayonet 104 can be provided on the bottom surface of the installation groove 103. After the hydrogel 20 is installed in the installation groove 103, the bayonet 104 is clamped with the side of the hydrogel 20 facing the bottom surface of the installation groove 103 to The connection between the housing 10 and the hydrogel 20 is more stable, and the hydrogel 20 is prevented from falling off the installation groove 103.

Specifically, a clamping structure (not shown) may be provided on the side of the hydrogel 20 facing the bayonet 104. After the hydrogel 20 is installed in the installation groove 103, the clamping structure on the hydrogel 20 is inserted into Inside the bayonet 104, and snapped with the bayonet 104.

Wherein, the number of the bayonet 104 can be multiple, and the multiple bayonet 104 can be arranged along the extending direction of the housing 10 to further improve the clamping effect of the bayonet 104 on the hydrogel 20.

In addition, the bayonet 104 can penetrate the bottom surface of the installation groove 103 to make the processing of the bayonet 104 more convenient and improve the clamping effect of the bayonet 104 on the hydrogel 20. Of course, when the bottom surface of the mounting groove 103 is thick, the bayonet 104 can also be a blind hole, which is not limited here.

Optionally, as shown in FIG. 3, the mounting groove 103 has two opposite inner side walls extending along the length direction of the housing 10. It is also possible to protrude first positioning ribs 105 on the inner side walls of the mounting groove 103. The positioning rib 105 extends in the direction from the inner arc surface 101 to the outer arc surface 102, and the first positioning rib 105 is positioned and connected to the hydrogel 20, so that the hydrogel 20 and the housing 10 are positioned and matched, and the water is coagulated. The movement of the glue 20 along the extending direction of the housing 10 is restricted.

Wherein, the number of the first positioning ribs 105 can be multiple, the multiple first positioning ribs 105 are distributed on two opposite inner side walls, and the first positioning rib 105 on each inner side wall runs along the housing 10 Are arranged in the length direction to further improve the positioning effect of the first positioning rib 105.

Alternatively, a second positioning rib 106 may be protruded on the bottom surface of the mounting groove 103, and the second positioning rib 106 extends along the arrangement direction of the two opposite side walls of the mounting groove 103. The gel 20 is positioned and connected to position and match the hydrogel 20 with the housing 10 and restrict the movement of the hydrogel 20 in the extending direction of the housing 10.

Wherein, the number of the second positioning ribs 106 can be multiple, and the multiple second positioning ribs 106 can be distributed along the length direction of the casing 10 to improve the positioning effect of the second positioning ribs 106.

It should be noted that only one of the first positioning rib 105 and the second positioning rib 106 may be provided in the installation groove 103, or the first positioning rib 105 and the second positioning rib 106 may be provided at the same time. Of course, The latter has a better positioning effect on the hydrogel 20.

In one embodiment, as shown in FIG. 1, a penetrating installation hole 107 may be provided on the bottom surface of the installation groove 103, so that the signal transmission assembly 30 passes through the installation hole 107 and protrudes from the outer arc surface 102 of the housing 10. This makes the connection between the signal transmission component 30 and the hydrogel 20 more stable, and facilitates the signal transmission component 30 to output brain electrical signals to other devices.

Wherein, the signal transmission assembly 30 may include a first conductive buckle 31 and a second conductive buckle 32. The first conductive buckle 31 is provided on the outer arc surface 102 of the housing 10, and the second conductive buckle 32 is provided on the inner arc of the housing 10. On the surface 101, the second conductive buckle 32 is connected to the hydrogel 20, and the second conductive buckle 32 is connected to the first conductive buckle 31 through the mounting hole 107, so that the connection between the signal transmission assembly 30 and the housing 10 is faster. It is stable and improves the connection strength between the shell 10 and the hydrogel 20.

Specifically, the side of the first conductive buckle 31 facing the outer arc surface 102 may have a clamping hole (not shown), and the side of the second conductive buckle 32 facing the inner arc surface 101 may have a clamping portion 321. The clamping portion 321 Pass through the mounting hole 107 and clamp with the card hole. Wherein, the clamping portion 321 may be a columnar structure, may be a buckle structure, etc., which is not limited here.

Optionally, the second conductive button 32 may be a silver-plated (Ag/AgCl) button to improve the signal transmission effect of the second conductive button 32.

Optionally, as shown in FIGS. 1 and 3, a first positioning groove 108 may be opened on the outer arc surface 102, and at least a part of the first conductive buckle 31 may be positioned and installed in the first positioning groove 108 to improve the first conductivity. The connection between the buckle 31 and the outer arc surface 102 of the housing 10 is stable. Specifically, the first conductive buckle 31 may be provided with an abutting portion 311 arranged in a disc shape, and the abutting portion 311 is recessed on one side facing the outer arc surface 102 to form a clamping portion 321 with the second conductive buckle 32 The clamping hole may be recessed on the outer arc surface 102 to form a circular first positioning groove 108. The diameter of the first positioning groove 108 is substantially the same as the diameter of the contact portion 311. When the first conductive buckle 31 After the abutting portion 311 is installed in the first positioning groove 108, the inner wall of the first positioning groove 108 can position the abutting portion 311 to prevent the abutting portion 311 from moving in its radial direction. Wherein, the mounting hole 107 is opened on the bottom surface of the first positioning groove 108 to facilitate the clamping portion 321 of the second conductive buckle 32 to pass through the mounting hole 107 to be clamped with the clamping hole on the first conductive buckle 31.

Similarly, a second positioning groove 109 can be opened on the bottom surface of the mounting groove 103, and at least part of the second conductive buckle 32 is installed in the second positioning groove 109 to improve the gap between the second conductive buckle 32 and the housing 10. Connection stability. The structure of the second conductive buckle 32 and the structure of the second positioning groove 109 can refer to the structure of the first conductive buckle 31 and the first positioning groove 108, which will not be repeated here.

It should be noted that the first positioning groove 108 and the second positioning groove 109 may be simultaneously provided on the housing 10, or only one of the first positioning groove 108 and the second positioning groove 109 may be provided on the housing 10. It can be determined according to the structure of the housing 10.

In an embodiment, as shown in FIGS. 1 to 3, a flange 112 may be provided on the outer side wall 113 of the housing 10, and the flange 112 is located on the edge of the outer side wall 113 near the notch of the mounting groove 103, and the The flange 112 extends along the length of the casing 10 to increase the width of the casing 10 close to the inner arc surface 101, thereby making the contact between the casing 10 and the forehead more stable.

Wherein, the surface of the flange 112 on the side close to the inner arc surface 101 can be flush with the inner arc surface 101, or the surface of the flange 112 on the side close to the inner arc surface 101 can protrude from the inner arc surface 101. Of course, the former It can make users wear more comfortable.

Optionally, the number of flanges 112 can be two, and the two flanges 112 are distributed on opposite sides of the notch of the installation groove 103, so that the force between the housing 10 and the forehead is on the housing 10 The uniform distribution in the width direction further improves the abutment stability between the housing 10 and the forehead.

In one embodiment, as shown in FIGS. 1 to 3, the two ends of the length direction of the housing 10 may be provided with connecting parts 110, and the two connecting parts 110 are used to connect with the two ends of the connecting belt, so that the EEG electrode It is enclosed with the connecting belt to form a ring structure that can surround the user's head, so that the brain electricity electrode can be worn on the user's forehead.

Specifically, a connecting hole 111 may be opened on the connecting portion 110, the connecting hole 111 penetrates the connecting portion 110, and the connecting strap passes through the connecting hole 111 and then connects to the connecting portion 110, thereby making the connection between the connecting portion 110 and the connecting strap more convenient .

Wherein, the connecting hole 111 can penetrate the connecting portion 110 along the arrangement direction of the inner arc surface 101 and the outer arc surface 102 of the housing 10, so that the processing of the connecting hole 111 is more convenient.

In an embodiment, the shell 10 can be made elastic, so that the shell 10 fits the user's forehead more closely, so that the hydrogel 20 fits the user's skin more closely. Of course, the housing 10 may not have elasticity, and the curvature of the housing 10 can be adjusted to make the housing 10 fit the forehead of the user more closely.

The above are only the preferred embodiments of the application, and do not limit the scope of the patent for this application. Under the inventive concept of the application, the equivalent structure transformation made by the content of the specification and drawings of the application, or direct/indirect use Other related technical fields are included in the scope of patent protection of this application.

Claims

An EEG electrode, wherein the EEG electrode includes:

The housing is arranged in an arc shape, and the housing has opposite inner and outer arc surfaces;

The hydrogel is arranged on the inner arc surface and extends along the length direction of the casing, at least part of the hydrogel protrudes from the inner arc surface of the casing; and,

The signal transmission component is connected to the housing, and the signal transmission component is electrically connected to the hydrogel, and is configured to output brain electrical signals received by the hydrogel.
3. The brain electricity electrode according to claim 1, wherein the inner arc surface of the housing is recessed to form an installation groove, and the hydrogel is installed in the installation groove.
The EEG electrode according to claim 2, wherein the bottom surface of the mounting groove is provided with a through mounting hole, and the signal transmission component passes through the mounting hole and protrudes from the outer arc surface of the housing .
The EEG electrode according to claim 3, wherein the signal transmission component comprises a first conductive button provided on the outer arc surface, and a second conductive button provided on the inner arc surface, and the first conductive button Two conductive buckles are connected to the hydrogel, the first conductive buckle has a clamping hole on the side facing the outer arc surface, and the second conductive buckle has a clamping portion on the side facing the inner arc surface, The clamping part passes through the mounting hole and is clamped with the clamping hole.
The EEG electrode of claim 4, wherein a first positioning groove is formed on the outer arc surface, and at least part of the first conductive buckle is positioned and installed in the first positioning groove; and/or,

A second positioning groove is defined on the bottom surface of the installation groove, and at least part of the second conductive buckle is installed in the second positioning groove.
The EEG electrode according to claim 5, wherein a flange is provided on the outer side wall of the housing, and the flange is located on the edge of the notch of the outer side wall close to the mounting groove, and the flange It extends along the length of the housing.
7. The brain electricity electrode according to claim 5, wherein two ends of the housing have connecting parts, and the two connecting parts are arranged to be connected to both ends of the connecting belt.
3. The EEG electrode according to claim 2, wherein a bayonet is formed on the bottom surface of the installation groove, and the bayonet is clamped with the side of the hydrogel facing the bottom surface of the installation groove.
The EEG electrode according to claim 8, wherein a flange is provided on the outer side wall of the housing, and the flange is located on the edge of the notch of the outer side wall close to the installation groove, and the flange It extends along the length of the housing.
8. The EEG electrode according to claim 8, wherein two ends of the housing have connecting parts, and the two connecting parts are arranged to be connected to both ends of the connecting belt.
3. The EEG electrode of claim 2, wherein the mounting groove has two opposite inner side walls extending along the length of the housing;

A first positioning rib is protrudingly provided on the inner side wall, and the first positioning rib extends from the inner arc surface to the outer arc surface. The first positioning rib and the hydrogel The positioning connection is configured such that the hydrogel and the housing are positioned and matched; and/or,

The bottom surface of the installation groove is convexly provided with a second positioning rib, the second positioning rib extends along the arrangement direction of the two inner side walls, and the second positioning rib is positioned and connected with the hydrogel, and is arranged Positioning and matching of the hydrogel and the shell.
The EEG electrode of claim 11, wherein a flange is provided on the outer side wall of the housing, and the flange is located on the edge of the notch of the outer side wall close to the installation groove, and the flange It extends along the length of the housing.
11. The brain electricity electrode of claim 12, wherein the number of the flanges is two, and the two flanges are distributed on opposite sides of the mounting slot.
11. The brain electricity electrode according to claim 11, wherein both ends of the housing have connecting parts, and the two connecting parts are arranged to be connected to both ends of the connecting band.
The EEG electrode according to claim 2, wherein a flange is provided on the outer side wall of the housing, and the flange is located on the edge of the notch of the outer side wall close to the installation groove, and the flange It extends along the length of the housing.
3. The EEG electrode of claim 2, wherein the number of the flanges is two, and the two flanges are distributed on opposite sides of the installation slot.
3. The brain electricity electrode according to claim 1, wherein both ends of the housing have connecting parts, and the two connecting parts are arranged to be connected to both ends of the connecting belt.