Adaptive floating electrode assembly and electroencephalogram ring

Abstract

The utility model relates to medical equipment technical field discloses a kind of self-adapting floating electrode assembly and electroencephalogram, including electrode module, universal connecting mechanism, universal connecting mechanism is used to connect electrode module to the elastic support connecting portion of head-mounted support structure, and universal connecting mechanism realizes the multiple freedom rotation of electrode module;Electrode module includes electrode shell and the electrode base, flexible floating mechanism being arranged in it, electrode base is floated and is arranged in electrode shell, and flexible floating mechanism is used to adjust the initial axial position of electrode base in electrode shell and provide axial elastic buffer when electrode base is pressed, and the end of electrode base away from flexible floating mechanism is provided with electrode point position.The utility model improves the self-adapting adhesion ability of electrode module and scalp by universal connecting mechanism, realizes electrode initial height adjustment and dynamic flexible compensation by flexible floating mechanism, and can effectively improve brain electrical signal acquisition stability.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to an adaptive floating electrode assembly and an EEG loop. Background Technology

[0002] An EEG loop is a portable EEG monitoring device used to collect EEG signals from the human scalp. It typically includes a ring-shaped main body, an elastic support structure, electrode components, and signal transmission lines. Compared to traditional EEG caps, EEG loops are simpler in structure, easier to wear, and more portable, and are widely used in routine EEG monitoring, brain-computer interface research, and neurological function assessment.

[0003] Existing EEG loops typically employ a structure with multiple electrode assemblies mounted on a ring-shaped main body or elastic support. The electrodes are pressed against the scalp by the elasticity of the support itself to acquire EEG signals. However, because the surface of the human head is not a regular curved surface, the curvature and height of the scalp vary in different locations. Existing EEG loops, where the electrode assemblies are adjusted only by the elastic support, suffer from limited angle adjustment range. When the electrode contact surface does not match the local curvature of the scalp, electrode tilting, edge contact, or uneven local pressure can easily occur, leading to decreased contact stability between the electrode and the scalp and affecting the quality of EEG signal acquisition. Furthermore, existing EEG loop electrodes usually rely on rigid connection structures or simple elastic structures to maintain contact during wear. When the body moves or the head posture changes, the electrodes are susceptible to instantaneous pressure changes, resulting in contact instability.

[0004] Therefore, the electrode components of existing EEG loops still need further optimization to improve the electrodes' adaptability to the curvature of the scalp and enhance contact stability during wear. Utility Model Content

[0005] This invention provides an adaptive floating electrode assembly and an EEG loop, aiming to solve the technical problems of poor adaptability to the curvature of the scalp and unstable dynamic contact in existing EEG loop electrode assemblies.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: An adaptive floating electrode assembly includes an electrode module and a universal connection mechanism. The universal connection mechanism is used to connect the electrode module to an elastic support connection part of a head-mounted support structure, and the universal connection mechanism enables multi-degree-of-freedom rotation of the electrode module. The electrode module includes an electrode shell and an electrode base disposed therein, and a flexible floating mechanism. The electrode base is floatingly disposed within the electrode shell. The flexible floating mechanism is used to adjust the initial axial position of the electrode base within the electrode shell and to provide axial elastic buffering when the electrode base is under pressure. Electrode points are arranged at the end of the electrode base away from the flexible floating mechanism.

[0007] As a preferred technical solution, the flexible floating mechanism includes an elastic element and an adjustment structure. The elastic element is connected to the adjustment structure and the electrode base at both ends. The adjustment structure includes an adjustment block and an adjustment knob. One end of the adjustment block is connected to the elastic element, and the other end is rotatably connected to the adjustment knob. The adjustment block is slidably disposed inside the electrode housing. The adjustment knob is threadedly connected to the electrode housing. By turning the adjustment knob, the adjustment block is moved, thereby changing the initial axial position of the electrode base inside the electrode housing.

[0008] As a preferred technical solution, the elastic element in the flexible floating mechanism is a diaphragm spring or a helical compression spring.

[0009] As a preferred technical solution, the universal joint mechanism includes a spherical connector and a spherical shell for accommodating the spherical connector, the spherical connector being able to rotate inside the spherical shell; the universal joint mechanism is provided with a damping structure for providing rotational damping.

[0010] As a preferred technical solution, the damping structure is a micro-helical damping structure disposed on the inner wall of the spherical shell, or a high-friction coefficient elastic damping material filled in the fitting gap between the spherical connector and the spherical shell.

[0011] As a preferred technical solution, the universal joint mechanism is further provided with a limiting structure to limit the swing range of the spherical connector.

[0012] As a preferred technical solution, the limiting structure is an asymmetrically shaped opening on the spherical shell, with the area of ​​the opening facing the scalp being larger than the area away from the scalp, and the shape of the opening restricting the spherical connector from swinging away from the scalp.

[0013] As a preferred technical solution, the universal connection mechanism is provided with a through-wire channel for signal wires to pass through.

[0014] As a preferred technical solution, the electrode base has an installation cavity for accommodating conductive cotton on one side of the electrode point. The inner peripheral wall of the installation cavity is provided with an elastic flange protruding towards the center of the installation cavity. The elastic flange is arranged circumferentially along the installation cavity and is used to limit the conductive cotton installed in the electrode base.

[0015] An EEG ring includes a head-mounted support structure and at least one adaptive floating electrode assembly as described above, the head-mounted support structure having at least one elastic support connection portion, and the adaptive floating electrode assembly being connected to the elastic support connection portion via its universal connection mechanism.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: The adaptive floating electrode assembly and EEG ring of this invention can improve the adaptive fit between the electrodes and the scalp: through the universal connection mechanism, the electrode module can be adjusted in multiple degrees of freedom according to the curvature of different users' heads, ensuring that the electrodes always remain in contact with the scalp, effectively reducing poor contact caused by electrode posture deviation and improving the stability of EEG signal acquisition.

[0017] The adaptive floating electrode assembly and EEG ring of this invention can achieve initial electrode height adjustment and dynamic flexibility compensation. Through the flexible floating mechanism, the initial extension height of the electrodes can be adjusted according to different user head shapes and wearing needs, so that the conductive part is closer to the scalp. After the height adjustment is completed, the elastic element continues to provide axial elastic compensation. When the force on the electrodes changes due to head movement, local curvature changes or pressure changes during wearing, the electrode base can generate a small elastic displacement to maintain stable contact between the conductive part and the scalp, thereby improving wearing comfort and the stability of EEG signal acquisition.

[0018] The adaptive floating electrode assembly and EEG ring of this invention form a reliable elastic limit on the edge of the conductive cotton by setting an elastic flange for limiting the position in the conductive cotton mounting cavity of the electrode base. This ensures stable installation of the conductive cotton and prevents it from shifting or falling off during wearing and exercise. When replacing the conductive cotton, there is no need to disassemble the electrode assembly or disconnect the wires, which can quickly complete the replacement of consumables and improve the efficiency of equipment maintenance.

[0019] This invention places the EEG signal wire inside the universal connection mechanism, allowing the signal wire to move synchronously with the spherical connector. This reduces the mechanical damage caused by repeated bending, stretching, and torsion of traditional exposed wires, and improves the reliability and service life of the electrode assembly during long-term use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall EEG loop of this utility model; Figure 2 This is a cross-sectional schematic diagram of the electrode assembly of this utility model; Figure 3 yes Figure 2 Enlarged view of point A within the dashed box.

[0022] Reference numerals: 1-Electrode module, 2-Universal connection mechanism, 3-Headband support structure, 4-Elastic support connection part, 11-Electrode shell, 12-Electrode base, 13-Electrode position, 14-Elastic element, 15-Adjusting pressure block, 16-Adjusting knob, 17-Conductive cotton, 18-Elastic flange, 21-Spherical connector, 22-Spherical shell, 23-Opening. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected 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.

[0024] An adaptive floating electrode assembly, such as Figure 1 , Figure 2As shown, the device includes an electrode module 1 and a universal connection mechanism 2. The universal connection mechanism 2 is used to connect the electrode module 1 to the elastic support connection part 4 of the head-mounted support structure 3. The universal connection mechanism 2 enables the electrode module 1 to rotate in multiple degrees of freedom. The electrode module 1 includes an electrode shell 11 and an electrode base 12 and a flexible floating mechanism disposed therein. The electrode base 12 is floatingly disposed inside the electrode shell 11. The flexible floating mechanism is used to adjust the initial axial position of the electrode base 12 inside the electrode shell 11 and to provide axial elastic buffer when the electrode base 12 is compressed. Electrode points 13 are arranged at the end of the electrode base 12 away from the flexible floating mechanism.

[0025] In one specific embodiment, the flexible floating mechanism includes an elastic element 14 and an adjustment structure. The elastic element 14 is connected at both ends to the adjustment structure and the electrode base 12, respectively. Preferably, the elastic element 14 is a diaphragm spring or a helical compression spring. Both diaphragm springs and helical compression springs are mature and reliable elastic elements, capable of providing stable and predictable axial elastic buffering force to the electrode base. The adjustment structure includes an adjustment block 15 and an adjustment knob 16. One end of the adjustment block 15 is connected to the elastic element 14, and the other end is rotatably connected to the adjustment knob 16. The adjustment block 15 is slidably disposed within the electrode housing 11, and the adjustment knob 16 is threadedly connected to the electrode housing 11. By turning the adjustment knob 16, the adjustment block 15 slides linearly within the electrode housing 11, thereby driving the electrode base 12 to move axially, allowing the electrode base to be adjusted to a suitable fitting height according to different user head shapes and wearing tightness.

[0026] Furthermore, such as Figure 3 As shown, the electrode base 12 has an installation cavity for accommodating conductive cotton 17. The inner circumferential wall of the installation cavity is provided with an elastic flange 18 protruding towards the center of the cavity. The elastic flange 18 is arranged circumferentially around the installation cavity and is used to limit the conductive cotton 17 installed within it. When installing the conductive cotton 17, the conductive cotton 17 squeezes the elastic flange 18 into the installation cavity. After installation, the elastic flange 18 rebounds and applies slight pressure to the edge of the conductive cotton 17, thereby achieving a stable installation of the conductive cotton 17, restricting its movement in the detachment direction, and facilitating easy removal during replacement, making the operation convenient.

[0027] In one specific embodiment, the universal joint mechanism 2 includes a spherical connector 21 and a spherical shell 22 for accommodating the spherical connector 21; the spherical connector 21 is rotatable inside the spherical shell 22; further, the universal joint mechanism is provided with a damping structure for providing rotational damping. By providing the damping structure, after the electrode module 1 is adjusted to a suitable angle, frictional damping is used to maintain its current position, avoiding free swinging due to wearing or movement, thereby improving the stability of the electrode posture. Specifically, the damping structure is a micro-helical damping structure provided on the inner wall of the spherical shell 22, or it can be a high-friction coefficient elastic damping material filled in the mating gap between the spherical connector 21 and the spherical shell 22.

[0028] Furthermore, the universal joint mechanism 2 is also provided with a limiting structure to restrict the swing range of the spherical connector 21, so as to keep the electrode module 1 facing the scalp. Preferably, the limiting structure is an asymmetrical opening 23 on the spherical shell 22, the area of ​​the opening 23 facing the scalp is larger than the area away from the scalp. The shape of the opening 23 allows the spherical connector 21 to swing in the left-right direction and towards the scalp, and restricts the spherical connector 21 from swinging away from the scalp, so that the electrode module can automatically adjust the contact angle according to the curvature of the scalp, while avoiding the electrode from tilting outward and affecting the contact stability.

[0029] Furthermore, the universal joint mechanism 2 is internally provided with a through-wire channel for the signal wire to pass through, the through-wire channel passing through the spherical shell 22 and the spherical connector 21. By placing the signal wire inside the universal joint mechanism, the wire remains within the internal space during the spherical joint's movement, effectively reducing damage caused by repeated bending, stretching, or tangling of the wire, and improving the reliability of the electrode assembly.

[0030] This utility model also provides an EEG ring, including a head-mounted support structure 3 and at least one electrode assembly as described above. The head-mounted support structure 3 has at least one elastic support connection part 4, and the electrode assembly is connected to the elastic support connection part 4 through its universal connection mechanism 2. Figure 1 As shown, the headband support structure 3 is in the shape of a headphone, including a hanger and a head frame at both ends of the hanger. The head frame extends along the head circumference and is provided with multiple elastic support connection parts 4. One end of the universal connection mechanism is fixedly connected to the elastic support connection part 4.

[0031] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. An adaptive floating electrode assembly, characterized in that: The device includes an electrode module (1) and a universal connection mechanism (2). The universal connection mechanism (2) is used to connect the electrode module (1) to the elastic support connection part (4) of the head-mounted support structure (3). The universal connection mechanism (2) enables the electrode module (1) to rotate in multiple degrees of freedom. The electrode module (1) includes an electrode shell (11) and an electrode base (12) and a flexible floating mechanism disposed therein. The electrode base (12) is floating inside the electrode shell (11). The flexible floating mechanism is used to adjust the initial axial position of the electrode base (12) inside the electrode shell (11) and to provide axial elastic buffer when the electrode base (12) is compressed. Electrode points (13) are arranged at the end of the electrode base (12) away from the flexible floating mechanism.

2. The adaptive floating electrode assembly according to claim 1, characterized in that: The flexible floating mechanism includes an elastic element (14) and an adjustment structure. The elastic element (14) is connected to the adjustment structure and the electrode base (12) at both ends. The adjustment structure includes an adjustment block (15) and an adjustment knob (16). One end of the adjustment block (15) is connected to the elastic element (14), and the other end is rotatably connected to the adjustment knob (16). The adjustment block (15) is slidably disposed inside the electrode shell (11). The adjustment knob (16) is threadedly connected to the electrode shell (11). By turning the adjustment knob (16), the adjustment block (15) is moved, thereby changing the initial axial position of the electrode base (12) inside the electrode shell (11).

3. The adaptive floating electrode assembly according to claim 2, characterized in that: The elastic element (14) in the flexible floating mechanism is a diaphragm spring or a helical compression spring.

4. The adaptive floating electrode assembly according to claim 1, characterized in that: The universal joint mechanism (2) includes a spherical connector (21) and a spherical shell (22) for accommodating the spherical connector (21). The spherical connector (21) is rotatable inside the spherical shell (22). The universal joint mechanism (2) is provided with a damping structure for providing rotational damping.

5. The adaptive floating electrode assembly according to claim 4, characterized in that: The damping structure is a micro-spiral damping structure disposed on the inner wall of the spherical shell (22), or a high-friction coefficient elastic damping material filled in the mating gap between the spherical connector (21) and the spherical shell (22).

6. The adaptive floating electrode assembly according to claim 4, characterized in that: The universal joint mechanism (2) is also provided with a limiting structure to limit the swing range of the spherical connector (21).

7. The adaptive floating electrode assembly according to claim 6, characterized in that: The limiting structure is an asymmetrical opening (23) on the spherical shell (22). The area of ​​the opening (23) facing the scalp is larger than the area away from the scalp. The shape of the opening (23) restricts the spherical connector (21) from swinging away from the scalp.

8. The adaptive floating electrode assembly according to claim 4, characterized in that: The universal joint mechanism (2) has a through-wire channel for signal wires to pass through.

9. The adaptive floating electrode assembly according to claim 1, characterized in that: The electrode base (12) is provided with an installation cavity for accommodating conductive cotton on one side of the electrode point (13). The inner peripheral wall of the installation cavity is provided with an elastic flange (18) protruding towards the center of the installation cavity. The elastic flange (18) is arranged circumferentially along the installation cavity and is used to limit the conductive cotton (17) installed in the electrode base (12).

10. A brainwave loop, characterized in that: The device includes a head-mounted support structure (3) and at least one adaptive floating electrode assembly as described in any one of claims 1-9, wherein the head-mounted support structure (3) has at least one elastic support connection (4), and the adaptive floating electrode assembly is connected to the elastic support connection (4) via its universal connection mechanism (2).

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