Electroencephalogram electrode and connecting structure thereof

Abstract

The utility model discloses an electroencephalogram electrode and a connecting structure thereof, which comprise a base, a mounting cavity is arranged in the middle of the base, an electrode terminal is clamped in the mounting cavity, the electrode terminal is connected with an electrode wire, a wire slot for the electrode wire to pass through is arranged on the mounting cavity, and the electrode wire is connected with the wire slot. A mounting cavity is formed in the base, a cover body is arranged at the top of the mounting cavity, a soft cavity is formed in the bottom of the electrode terminal, a mounting through hole for the soft cavity to pass through is formed in the bottom of the base, a sponge is arranged in the middle of the soft cavity, and the top of the sponge is attached to the electrode terminal; the utility model has the advantages of convenient operation, good test effect, and good comfort.

Description

Technical Field

[0001] This utility model belongs to the technical field of electroencephalogram (EEG) testing devices, specifically relating to an EEG electrode and its connection structure. Background Technology

[0002] In recent years, multimodal fusion technologies, such as near-infrared and electroencephalography combined with other technologies, have received increasing attention and application in brain science research and clinical diagnosis, and are considered to be one of the most promising cutting-edge technologies.

[0003] Electroencephalography (EEG) is the acquisition of neurophysiological signals. It collects voltage signals through contact between electrodes and the scalp, amplifies them, and performs analog-to-digital conversion for storage and display. Its key advantage lies in its high temporal resolution, directly measuring brain neural signals, and it has been widely applied in research and clinical practice. Near-infrared brain imaging (NIBI) is a non-invasive optical imaging technique that has emerged in recent years. It indirectly measures the functional state of the brain by detecting changes in the concentrations of oxyhemoglobin and deoxyhemoglobin. Its key advantages include ease of use, strong anti-interference capabilities, and moderate temporal and spatial resolution.

[0004] Near-infrared EEG combined technology further integrates the advantages of both, enabling simultaneous acquisition or diagnosis of electrical and optical signals in a single data collection or examination, thus achieving the fusion of the two modalities. Since light and electricity do not interfere with each other, this combination has a comparative advantage over other multimodal technologies such as MRI-EEG.

[0005] The problem with existing technologies is that, in order to ensure that the probe makes contact with the head, most of the current EEG caps rely on conductive gel for data collection. The use of conductive gel is time-consuming and laborious. Furthermore, because conductive gel is prone to overflow, the near-infrared probe is easily contaminated, affecting the test results. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the prior art by providing an EEG electrode and its connection structure, which has the advantages of convenient operation, good testing results, and good comfort.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electroencephalogram (EEG) electrode, comprising a base, a mounting cavity in the middle of the base, an electrode terminal engaged within the mounting cavity, an electrode wire connected to the electrode terminal, a groove for the electrode wire to pass through in the mounting cavity, a cover at the top of the mounting cavity, a soft cavity at the bottom of the electrode terminal, a mounting through hole at the bottom of the base for the soft cavity to pass through, a sponge in the middle of the soft cavity, and the top of the sponge fitting against the electrode terminal.

[0008] In the above scheme, an installation cavity is opened in the middle of the base to position the electrode terminal. The electrode wire of the electrode terminal is led out to the outside of the base through the wire groove to connect to the signal acquisition and processing system. The cover is used to close the installation cavity and limit the position of the electrode terminal. An installation through hole is opened at the bottom of the base. The soft cavity at the bottom of the electrode terminal passes through the installation through hole. A sponge is placed in the middle of the soft cavity. The sponge needs to absorb conductive liquid before use. When in use, the two ends of the sponge contact the human head and the electrode terminal respectively to realize signal transmission. Both the sponge and the soft cavity are soft materials, which will produce a certain elastic deformation when in contact with the human body to ensure comfort and contact effect.

[0009] Furthermore, the cover is provided with an elastic pressing part for engaging with the top surface of the electrode terminal, and a locking structure is provided between the cover and the base.

[0010] When the cover is put on, the top surface of the electrode terminal is pressed by the elastic clamping part to ensure the stable positioning of the electrode terminal. The cover and the base are provided with a locking structure for locking connection.

[0011] Furthermore, one end of the cover is rotatably connected to the base, and the other end of the cover is provided with the locking structure.

[0012] One end of the cover is rotatably connected to the base, and the other end is connected to the base through a snap-fit ​​structure, which facilitates the opening and closing of the cover by rotation and makes the structure simple.

[0013] Furthermore, a guide hole is provided in the middle of the cover, and a pressing column is movably disposed in the guide hole. The elastic pressing part is disposed between the pressing column and the cover.

[0014] A clamping column that can move up and down is installed inside the guide hole. Under the action of the elastic clamping part, the bottom end of the clamping column elastically clamps the electrode terminal, ensuring the stable positioning of the electrode terminal.

[0015] Furthermore, the soft cavity has a ring-shaped structure, and the bottom of the soft cavity has a flared structure.

[0016] The soft cavity is annular, with an internal cavity to accommodate the sponge. The flared structure at the bottom covers the outside of the sponge to limit its movement.

[0017] Furthermore, the sponge has a cylindrical structure, with the bottom end of the cylindrical structure extending beyond the bottom end of the soft cavity.

[0018] The sponge has a cylindrical structure, which makes it easy to connect to the inner cavity of the soft cavity. The bottom end of the cylindrical structure extends out to ensure contact with the human head.

[0019] A connection structure for the above-mentioned EEG electrodes includes a headgear, wherein the base is connected to the headgear, and the EEG electrodes are arranged on the headgear in accordance with international standard 10-20.

[0020] The EEG electrodes are arranged in 10-20 rows according to international standards to cover all brain regions, making them easy to use.

[0021] Furthermore, the headgear is provided with a near-infrared probe along a rectangular edge. The near-infrared probe includes two transmitting probes and two receiving probes. The two transmitting probes are arranged diagonally, and the EEG electrodes are located in the middle of the rectangle.

[0022] By setting the near-infrared probe along a rectangle, with the transmitting and receiving probes positioned diagonally, and placing the EEG electrodes in the center of the rectangle, better coverage and greater comparability with near-infrared channel testing can be achieved.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. By using the electrode terminals in conjunction with a sponge, and utilizing the conductivity of the sponge after absorbing the conductive liquid, a tight contact between the electrode terminals and the head is achieved. No conductive paste is required, making operation convenient and providing good testing results. It does not interfere with the near-infrared probe, ensuring testing effectiveness.

[0025] 2. The cover structure facilitates the installation of electrode terminals and sponge, making the entire wearing process convenient and efficient;

[0026] 3. By setting up a soft cavity to limit the sponge, it makes flexible contact with the head, ensuring close contact with the head while providing good comfort, preventing the residue of the paste, and making it easy to clean. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural view of an electroencephalogram (EEG) electrode according to Embodiment 1 of this utility model;

[0028] Figure 2 This is a cross-sectional view of the structure of an electroencephalogram (EEG) electrode according to Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the connection structure of an EEG electrode in Embodiment 1 of this utility model;

[0030] Figure 4 This is a three-dimensional structural view of an electroencephalogram (EEG) electrode according to Embodiment 2 of this utility model;

[0031] Figure 5 This is a three-dimensional structural view of an electroencephalogram (EEG) electrode according to Embodiment 3 of this utility model;

[0032] In the diagram: 1. Base; 2. Mounting cavity; 3. Electrode terminal; 4. Electrode wire; 5. Wire groove; 6. Cover; 7. Soft cavity; 8. Mounting through hole; 9. Sponge; 10. Rotating shaft; 11. Claw; 12. Slot; 13. Guide hole; 14. Clamping post; 15. Flared structure; 16. Headgear; 17. Transmitting probe; 18. Receiving probe; 19. EEG electrode; 20. Tag; 21. Spring. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms front, back, left, right, etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Example 1

[0034] like Figure 1-2 As shown, an EEG electrode 19 includes a base 1, a mounting cavity 2 in the middle of the base 1, an electrode terminal 3 that is engaged within the mounting cavity 2, an electrode wire 4 connected to the electrode terminal 3, a groove 5 for the electrode wire 4 to pass through the mounting cavity 2, a cover 6 at the top of the mounting cavity 2, a soft cavity 7 at the bottom of the electrode terminal 3, a mounting through hole 8 at the bottom of the base 1 for the soft cavity 7 to pass through, a sponge 9 in the middle of the soft cavity 7, and the top of the sponge 9 being in contact with the electrode terminal 3.

[0035] In the above scheme, the mounting cavity 2 is opened in the middle of the base 1 to position the electrode terminal 3. The electrode wire 4 of the electrode terminal 3 is led out to the outside of the base 1 through the wire groove 5 to connect to the signal acquisition and processing system. The cover 6 is used to close the mounting cavity 2 to limit the position of the electrode terminal 3. The bottom of the base 1 is provided with a mounting through hole 8. The soft cavity 7 at the bottom of the electrode terminal 3 is set through the mounting through hole 8. The soft cavity 7 is provided with a sponge 9 in the middle. The sponge 9 needs to absorb conductive liquid before use. When in use, the two ends of the sponge 9 contact the human head and the electrode terminal 3 respectively to realize signal transmission. Both the sponge 9 and the soft cavity 7 are soft materials, which will produce a certain elastic deformation when in contact with the human body to ensure comfort and contact effect.

[0036] Electrode terminal 3 includes an ag / agcl electrode. In use, first soak electrode terminal 3 and sponge 9 together in a conductive liquid, such as saline solution, allowing sponge 9 to fully absorb the saline solution. Then place them in the EEG electrode holder base 1 according to their respective positions. Secure the EEG holder cover into the base 1 using the snap-fit ​​mechanism. At this point, spring 21 will hold the saline electrodes in place. Because the sponge 9 and soft cavity of the saline electrodes are made of soft material, they will undergo some elastic deformation as the cap is worn, without causing discomfort. A wire leads out to the rear-end EEG amplifier. After placing all the saline electrodes, place the near-infrared probes into their respective positions in the near-infrared holder. A wire connects them to the rear-end near-infrared circuitry.

[0037] Furthermore, the cover 6 is provided with an elastic pressing part for engaging with the top surface of the electrode terminal 3, and a locking structure is provided between the cover 6 and the base 1.

[0038] When the cover 6 is closed, the top surface of the electrode terminal 3 is pressed by the elastic pressing part to ensure the stable positioning of the electrode terminal 3. The cover 6 and the base 1 are provided with a locking structure for locking connection.

[0039] The cover 6 and the base 1 can be connected by a snap-fit ​​structure; or they can be connected by rotation on one side and snap-fit ​​on the other side.

[0040] Furthermore, one end of the cover 6 is rotatably connected to the base 1, and the other end of the cover 6 is provided with the locking structure.

[0041] One end of the cover 6 is rotatably connected to the base 1, and the other end is connected to the base 1 through a snap-fit ​​structure, which facilitates the rotation, opening and closing of the cover 6 and makes the structure simple.

[0042] One end of the cover 6 is rotatably connected to the base 1 via a rotating shaft 10, and the other end of the cover 6 is provided with a claw 11. The base 1 is provided with a slot 12 that cooperates with the claw 11.

[0043] Furthermore, a guide hole 13 is provided in the middle of the cover 6, and a pressing column 14 is movably disposed in the guide hole 13. The elastic pressing part is disposed between the pressing column 14 and the cover 6.

[0044] A pressing column 14 that can move up and down is provided in the guide hole 13. Under the action of the elastic pressing part, the bottom end of the pressing column 14 elastically presses the electrode terminal 3, ensuring that the electrode terminal 3 is positioned stably.

[0045] The clamping column 14 is an H-shaped column, and the elastic clamping part includes a spring 21. The spring 21 can be set on one or both sides of the cover 6.

[0046] Furthermore, the soft cavity 7 has an annular structure, and the bottom of the soft cavity 7 has a flared structure 15.

[0047] The soft cavity 7 is annular, with an internal cavity to accommodate the sponge 9. The flared structure 15 at the bottom covers the outside of the sponge 9 to limit its position.

[0048] The flexible cavity 7 is made of a soft material, such as rubber. The flexible cavity 7 can be snapped into the bottom of the electrode terminal 3 or integrally formed.

[0049] Furthermore, the sponge 9 has a cylindrical structure, and the bottom end of the cylindrical structure extends out of the bottom end of the soft cavity 7.

[0050] The sponge 9 has a cylindrical structure, which makes it easy to connect to the inner cavity of the soft cavity 7. The bottom end of the cylindrical structure extends out to ensure contact with the human head.

[0051] The sponge 9 fits tightly against the upper part of the inner cavity of the soft cavity 7, achieving the snap-fit ​​positioning of the sponge 9.

[0052] like Figure 3 As shown, a connection structure for the above-mentioned EEG electrode 19 includes a head cover 16, the base 1 is connected to the head cover 16, and the EEG electrode 19 is arranged on the head cover 16 in accordance with international standard 10-20.

[0053] The EEG electrodes 19 are arranged in accordance with the international standard of 10-20 to cover all brain regions, making them easy to use.

[0054] Furthermore, the headgear 16 is provided with a near-infrared probe along a rectangle. The near-infrared probe includes two transmitting probes 17 and two receiving probes 18. The two transmitting probes 17 are arranged diagonally, and the EEG electrode 19 is located in the middle of the rectangle.

[0055] By setting the near-infrared probe along the rectangle, with the transmitting probe 17 and the receiving probe 18 set along the diagonal, and the EEG electrode 19 placed in the middle of the rectangle, a better coverage effect and more comparability with near-infrared channel testing can be achieved.

[0056] Thirty-two EEG electrodes are arranged according to the international standard 10-20 layout (with the line connecting the nasal root and the occipital protuberance and the line connecting the anterior concavities of the left and right ears as the central axis, and the electrodes are fixedly placed according to a ratio of 10% and 20%). Each EEG electrode base 1 is equipped with a corresponding EEG electrode tag 20 to facilitate the placement of the corresponding electrode.

[0057] The positions of the transmitting probe 17 and the receiving probe 18 can be interchanged. The distance between adjacent transmitting probes 17 and receiving probes 18 is 30mm. This arrangement is based on a 32-channel EEG that takes into account all brain regions and spatial locations: 29 transmitting and 29 receiving channels, totaling 77 channels.

[0058] The headgear 16 is a black, breathable cloth cap that is easy to wear and provides light protection. The silicone rubber lining provides a certain degree of rigidity for support and ensures the spacing between the near-infrared emitter and receiver.

[0059] Unlike near-infrared spectroscopy, the measurement area for electroencephalography (EEG) is located directly below the EEG electrodes. The EEG measurement area should overlap with the brain region traversed by the near-infrared transmitting probe 17 and receiving probe 18. This allows for correlated comparison of measurements of the same brain region. While placing the EEG electrodes precisely in the center of the transmitting and receiving probes 17 and 18 achieves the best comparability, to maximize coverage and comparability with more near-infrared channels, placing the EEG electrodes in the center of the two transmitting and two receiving rectangular areas, as shown in the diagram, maximizes coverage and comparability with more near-infrared channels. Example 2

[0060] like Figure 4 As shown, the EEG electrode and its connection structure in this embodiment are further modified from Embodiment 1 as follows:

[0061] The elastic clamping part structure is eliminated, and the top surface of the electrode terminal 3 is clamped by the cover 6. Example 3

[0062] like Figure 5 As shown, the EEG electrode and its connection structure in this embodiment are further modified from Embodiment 1 as follows:

[0063] The structure of guide hole 13 and clamping column 14 is cancelled.

[0064] An elastic clamping part is located at the bottom of the cover 6, which ensures the stable positioning of the electrode terminal 3. The elastic clamping part includes a spring.

[0065] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A type of electroencephalogram (EEG) electrode, characterized in that, The device includes a base, a mounting cavity in the middle of the base, an electrode terminal engaged in the mounting cavity, an electrode wire connected to the electrode terminal, a groove for the electrode wire to pass through the mounting cavity, a cover on the top of the mounting cavity, a flexible cavity at the bottom of the electrode terminal, a mounting through hole at the bottom of the base for the flexible cavity to pass through, a sponge in the middle of the flexible cavity, and the top of the sponge fitting against the electrode terminal.

2. The EEG electrode according to claim 1, characterized in that, The cover is provided with an elastic pressing part for engaging with the top surface of the electrode terminal, and a locking structure is provided between the cover and the base.

3. The EEG electrode according to claim 2, characterized in that, One end of the cover is rotatably connected to the base, and the other end of the cover is provided with the locking structure.

4. The EEG electrode according to claim 2, characterized in that, A guide hole is provided in the middle of the cover, and a pressing column is movably disposed in the guide hole. The elastic pressing part is disposed between the pressing column and the cover.

5. The EEG electrode according to claim 1, characterized in that, The soft cavity has a ring-shaped structure, and the bottom of the soft cavity has a flared structure.

6. The EEG electrode according to claim 1, characterized in that, The sponge has a cylindrical structure, with the bottom end of the cylindrical structure extending beyond the bottom end of the soft cavity.

7. A connection structure for EEG electrodes as described in any one of claims 1-6, characterized in that, Includes a headgear, the base is connected to the headgear, and the EEG electrodes are arranged on the headgear according to international standard 10-20.

8. The connection structure of the EEG electrodes according to claim 7, characterized in that, The headgear has a near-infrared probe arranged along a rectangle. The near-infrared probe includes two transmitting probes and two receiving probes. The two transmitting probes are arranged diagonally. The EEG electrodes are located in the middle of the rectangle.

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