Magnetic flexible dry electrode device

Abstract

The utility model discloses a magnetic flexible dry electrode device which comprises an electrode base and a flexible dry electrode. A rigid conductive part and a first magnetic part are arranged in the electrode base; the flexible dry electrode comprises a flexible connecting part and a flexible claw part in contact with the head part, a second magnetic component is arranged in the flexible connecting part, and the magnetism of the second magnetic component is opposite to that of the first magnetic component; during assembly, under the mutual attraction of the two magnetic parts, the flexible connecting part is aligned with the electrode base and enters the electrode base through extrusion to be in contact with the rigid conductive part, and the rigid conductive part transmits electroencephalogram signals sensed by the flexible claw part out. According to the flexible dry electrode, the assembling hand feeling of the flexible dry electrode is improved, and meanwhile the stability of electrode connection can be better improved.

Description

Technical Field

[0001] The utility model relates to the field of electroencephalogram sensors, in particular to a magnetically attracted flexible dry electrode device. Background Art

[0002] At present, the connection between the flexible dry electrode and the rear base mostly adopts the connection method of male and female buckles, where the male buckle end is made of flexible material and the female buckle end is made of rigid material. However, during the plugging and unplugging process, it is not easy to align the male and female buckles, the process of inserting the male buckle into the female buckle is not smooth enough, and the buckling feel is poor; moreover, after multiple pluggings and unplugging, the male buckle end is prone to deformation and falling off, resulting in unstable electrical connection with the base end.

[0003] Existing solutions mostly adopt rigid dry electrodes or increase the hardness of flexible dry electrodes to solve the problem of unstable electrical connection with the electrode wire, but this method will sacrifice the comfort of contact between the dry electrode and the scalp, and is likely to cause discomfort to the wearer. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a magnetically attracted flexible dry electrode device that can simultaneously improve the assembly feel and connection stability between the dry electrode and the electrode base.

[0005] The technical solution adopted by the utility model is as follows:

[0006] Provide a magnetically attracted flexible dry electrode device, including an electrode base and a flexible dry electrode;

[0007] The electrode base is internally provided with a rigid conductive component and a first magnetic component;

[0008] The flexible dry electrode includes a flexible connection part and a flexible claw part that contacts the head. The flexible connection part is internally provided with a second magnetic component, and the magnetic property is opposite to that of the first magnetic component;

[0009] During assembly, under the mutual attraction of the two magnetic components, the flexible connection part is aligned with the electrode base and enters it through extrusion to contact the rigid conductive component, and the rigid conductive component transmits the electroencephalogram signal sensed by the flexible claw part.

[0010] According to the above technical solution, when the flexible connection part is extruded into the interior of the electrode base, its side surface or top surface is attached to the rigid conductive component.

[0011] According to the above technical solution, at least one convex connecting piece is provided on the rigid conductive component. During assembly, the convex connecting piece is in full contact with the flexible connecting piece through extrusion.

[0012] According to the above technical solution, a signal interface connected to the rigid conductive component is provided on the electrode base, and an external device is connected to the flexible dry electrode device through the signal interface.

[0013] Continuing with the above technical solution, the second magnetic component is embedded in the flexible dry electrode; or the second magnetic component is attached to the surface of the flexible dry electrode through a connecting member.

[0014] Continuing with the above technical solution, a card slot is provided between the flexible connecting portion and the flexible claw portion of the flexible dry electrode. During assembly, the bottom of the electrode base is clamped in this card slot.

[0015] Continuing with the above technical solution, a cavity is provided in the electrode base, and a push plate for installing the first magnetic component is provided therein. An elastic member is provided above the push plate, and a rigid conductive component is provided around the lower part of the cavity. When the flexible dry electrode is not assembled, the elastic member pushes the push plate to the bottom of the electrode base; when assembling the flexible dry electrode, the flexible connecting portion is adsorbed onto the push plate under the magnetic action and pushes the push plate upward into the cavity under the thrust force to contact the rigid conductive component.

[0016] Continuing with the above technical solution, a cavity is provided in the electrode base, and a push plate for installing the first magnetic component is provided therein. An elastic member is provided above the push plate, and a plurality of claw-shaped tentacle-like rigid conductive components are provided at the bottom of the push plate. A plurality of matching card slots are provided on the flexible connecting portion of the flexible dry electrode. When the flexible dry electrode is not assembled, the elastic member pushes the push plate to the bottom of the electrode base; when assembling the flexible dry electrode, the flexible connecting portion is adsorbed onto the push plate under the magnetic action and pushes the push plate upward into the cavity under the thrust force, and the rigid conductive component is inserted into the corresponding card slot of the flexible connecting portion.

[0017] Continuing with the above technical solution, a wire groove is provided on the rigid conductive component, and the wire connected to the rigid conductive component is placed in this wire groove and connected to the outside.

[0018] Continuing with the above technical solution, the part of the flexible claw portion in contact with the head is additionally coated with a conductive layer having a higher conductivity than the flexible dry electrode body.

[0019] The beneficial effects of the present utility model are as follows: By arranging a rigid conductive component and a magnetic component inside the electrode base in the present utility model, a magnetic component is also arranged inside the flexible connecting portion of the flexible dry electrode, and the magnetic properties of the two magnetic components are opposite; during assembly, under the mutual attraction of the two magnetic components, the flexible connecting portion can be better aligned with the electrode base to achieve the function of pre-positioning and improve the assembly feel; the flexible connecting portion enters the electrode base through extrusion and is in full contact with the rigid conductive component, which can better improve the stability of the electrode connection.

[0020] In addition, the bottom of the flexible dry electrode uses a claw-like structure, which can enable the dry electrode to effectively penetrate the hair and form good contact with the scalp. Further, a conductive coating with better conductivity is coated at the bottom end of the flexible claw portion, which can improve the sensing accuracy.

[0021] Further, when the flexible connection part is extruded into the electrode base, it can be attached to the rigid conductive component through its side or top. The rigid conductive component can select a suitable structure and attachment area according to the contact position with the flexible dry electrode, thereby ensuring sufficient and stable contact.

[0022] Further, by arranging a push plate and an elastic component in the electrode base, and directly arranging the magnetic component in the push plate, pre-positioning can be better achieved through magnetic force guidance during the assembly of the flexible dry electrode. During the upward pushing of the push plate, the elastic component is compressed, creating a space to accommodate the head of the flexible dry electrode. And after the assembly is completed, under the thrust of the elastic component, the flexible dry electrode is in more sufficient contact with the rigid conductive component.

[0023] Further, by providing at least one convex connecting piece on the rigid conductive component, during assembly, the convex connecting piece is in full contact with the flexible connecting piece through extrusion, improving the assembly efficiency and the stability of the electrode connection at the same time.

[0024] Of course, any product implementing the present utility model does not necessarily need to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a magnetically attracted flexible dry electrode device according to an embodiment of the present utility model;

[0027] Figure 2 is Figure 1 an exploded view of the embodiment;

[0028] Figure 3 is Figure 1 a cross-sectional schematic diagram of the flexible dry electrode of the embodiment installed in the electrode base;

[0029] Figure 4A is a cross-sectional schematic diagram of a magnetically attracted flexible dry electrode device before assembly according to another embodiment of the present utility model;

[0030] Figure 4B is Figure 4A a cross-sectional schematic diagram of the magnetically attracted flexible dry electrode device after assembly;

[0031] Figure 5 is a cross-sectional schematic diagram of a magnetically attracted flexible dry electrode device after assembly according to the third embodiment of the present utility model;

[0032] Figure 6 is a cross-sectional schematic diagram of a magnetically attracted flexible dry electrode device after assembly according to the fourth embodiment of the present utility model;

[0033] Figure 7 It is a cross-sectional schematic diagram after the assembly of the magnetic-attraction flexible dry electrode device according to the fifth embodiment of the present invention;

[0034] Figure 8A It is a cross-sectional schematic diagram of the electrode base in the fifth embodiment of the present invention;

[0035] Figure 8B It is a top view of the flexible connection part of the flexible dry electrode in the fifth embodiment of the present invention;

[0036] Figure 9 It is a cross-sectional schematic diagram of the flexible dry electrode in the sixth embodiment of the present invention;

[0037] In the figure:

[0038] 1. Electrode base; 2. Flexible dry electrode; 3. Lead wire; 11. Base; 111. First magnetic component; 12. Rigid conductive component; 13. Outer shell; 14. Push plate; 15. Elastic member; 21. Second magnetic component; 22. Flexible claw part; 23. Card slot; 24. Connector; 241. Card member; 131. Limit buckle. Specific embodiments

[0039] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] As Figure 1 shown, the magnetic-attraction flexible dry electrode device in this embodiment mainly collects brain electrical signals, and mainly includes an electrode base 1 and a flexible dry electrode 2. The device can send out the collected brain electrical signals through a lead wire 3.

[0041] Among them, the electrode base 1 is internally provided with a rigid conductive component 12 and a first magnetic component 111; the flexible dry electrode 2 includes a flexible connection part and a flexible claw part 22 that contacts the head. The flexible connection part is internally provided with a second magnetic component 21, and the magnetic property is opposite to that of the first magnetic component 111;

[0042] During assembly, under the mutual attraction of the two magnetic components, the flexible connection part can be better aligned with the electrode base 1 to achieve the function of pre-positioning and improve the assembly feel; the flexible connection part enters it through extrusion and is in full contact with the rigid conductive component 12, which can better improve the stability of electrode connection. The rigid conductive component 12 transmits the brain electrical signals sensed by the flexible claw part 22.

[0043] The flexible dry electrode 2 is made of a flexible conductive material, and its contact end with the scalp is a multi-claw structure, which can effectively pass through the hair and contact the scalp to form a connection.

[0044] As Figure 2 shown, the electrode base 1 includes a base 11 and a housing 13. A first magnetic component 111 is built into the base 11; the rigid conductive component 12 is a ring-shaped part and is arranged around the housing 13; the flexible dry electrode 2 is a circular electrode. During assembly, the circular electrode is pressed into the housing 13, and its periphery fits against the inner side of the ring-shaped part. As Figure 3 shown, the outer diameter of the flexible connection part of the flexible dry electrode 2 can be slightly larger than the inner diameter of the rigid conductive component 12. Through extrusion deformation, the side wall and the top of the flexible connection part are made to fit against the side wall and the top of the rigid conductive component 12 respectively, forming an electrical connection path.

[0045] Furthermore, as Figure 3 shown, the connection between the base 11 and the housing 13 is a threaded connection or a snap connection, and the rigid conductive component 12 is fixed by being pressed tightly by the base 11 and the housing 13. As Figure 2 and Figure 3 shown, the base 11 is provided with an external thread, and the housing 13 is provided with an internal thread, and the two are connected in cooperation. A receiving groove is provided at the bottom of the housing 11, and the rigid conductive component 12 can be placed in the receiving groove. When the base 11 is connected to the housing 13, the base 11 simultaneously presses the rigid conductive component 12 located below it.

[0046] Furthermore, a wire outlet hole can be provided on the housing 13, and the wire 3 passes through the wire outlet hole.

[0047] The second magnetic component 21 can be embedded in the flexible dry electrode 2 through a plastic injection molding process with encapsulation. A card slot 23 is provided between the flexible connection part and the flexible claw part 22 of the flexible dry electrode 2, and the card slot 23 can be formed by a connection part with a smaller diameter between the flexible connection part and the flexible claw part 22. During assembly, the bottom of the electrode base 1 is clamped in the card slot 23.

[0048] As Figure 3 shown, when installing the flexible dry electrode 2, the second magnetic component 21 is attracted by the first magnetic component 111, which can enhance the insertion and extraction feel of the flexible dry electrode 2, and stabilize the fitting of the flexible connection part of the flexible dry electrode 2 with the electrode base 1, so that the flexible dry electrode 2 is in a stable fitting state with the side wall of the rigid conductive component 12, and also makes the electrical connection more reliable. It can be seen that the setting of the magnetic component improves the assembly feel between the dry electrode and the base and the connection stability at the same time.

[0049] In another embodiment of the present invention, as Figure 4AAs shown in the figure, a cavity is provided inside the electrode base 1, and a push plate 14 for installing the first magnetic component 111 is arranged therein. The push plate 14 can slide vertically in the cavity of the electrode base 1. An elastic member 15 is provided above the push plate 14, and the elastic member 15 can be a spring. The rigid conductive component 12 is arranged in a ring shape below the cavity; when the flexible dry electrode 2 is not assembled, the elastic member 15 pushes the push plate 14 to the bottom of the electrode base 1; when the flexible dry electrode 2 is assembled, the flexible connecting portion is adsorbed onto the push plate 14 under the magnetic action, and is pushed by the thrust force to move the push plate 14 upward into the cavity and contact the rigid conductive component 12. This embodiment also achieves the pre-positioning effect through the adsorption between the magnetic components. As Figure 4B shown, when the flexible dry electrode 2 is assembled, the flexible dry electrode 2 is pushed by hand, the elastic member 15 is pushed back together with the push plate 14 under the pressure, and the flexible connecting portion at the head of the flexible dry electrode is squeezed into the cavity of the electrode base 1. The electrode base 1 can also be as Figure 3 the embodiment shown, which includes a housing and a base, and a limit buckle 131 is further arranged at the bottom end of the housing. A card slot 23 is arranged between the flexible connecting portion and the flexible claw portion 22 of the flexible dry electrode 2. When the flexible connecting portion of the flexible dry electrode 2 is squeezed into the housing, the limit buckle 131 is snapped into the card slot 23 on the dry electrode to prevent the dry electrode from falling off. The outer diameter of the flexible connecting portion of the flexible dry electrode 2 is slightly larger than the inner diameter of the rigid conductive component 12, and the flexible connecting portion is attached to the rigid conductive component 12 through extrusion deformation to form an electrical connection path.

[0050] In the above embodiment, by arranging the push plate 14 and the elastic member 15 inside the electrode base 1, the first magnetic component 111 is directly arranged in the push plate 14, which can better achieve pre-positioning through magnetic force guidance during the assembly process of the flexible dry electrode 2. During the upward push of the push plate 14, the elastic member 15 is compressed, creating a space to accommodate the head of the flexible dry electrode. And after the assembly is completed, under the thrust force of the elastic member 15, the flexible dry electrode 2 contacts the rigid conductive component 12 more fully.

[0051] In order to reasonably arrange the wire 3, in the above embodiments, a wire groove can be arranged on the rigid conductive component 12, and the wire 3 connected to the rigid conductive component 12 is placed in the wire groove and connected to the outside.

[0052] As Figure 5 shown, it is another embodiment of the present invention, which is based on Figure 4AIn the embodiment, the difference is that instead of additionally providing a rigid conductive component inside the electrode base 1, a plurality of claw-shaped tentacle-like rigid conductive components 12 are directly provided at the bottom of the push plate 14, and a plurality of matching card slots 23 are provided on the flexible connection part of the flexible dry electrode 2; when the flexible dry electrode 2 is not assembled, the elastic member 15 pushes the push plate 14 to the bottom of the electrode base 1; when assembling the flexible dry electrode 2, the flexible connection part 2 is adsorbed onto the push plate 14 under the magnetic action, and under the thrust, the push plate 14 is pushed upward into the cavity, and the rigid conductive component 12 at the bottom of the push plate 14 is inserted into the corresponding card slot 23 of the flexible connection part. This embodiment improves the assembly efficiency and also improves the stability of the electrode connection.

[0053] The bottom of the flexible dry electrode 2 in the above embodiment uses a claw-like structure, and a conductive coating with stronger conductivity can be coated on the bottom end. The flexible dry electrode structure with a claw-like structure can effectively penetrate through the hair and form good contact with the scalp, and the conductive coating makes the dry electrode more sensitive to sense brain waves.

[0054] It can be understood that in other embodiments, the extrusion connection between the rigid conductive component and the flexible dry electrode can have various forms:

[0055] (1) The inner side of the rigid conductive component 12 is extruded with the side surface of the flexible connection part of the flexible dry electrode 22 to form a connection

[0056] After being assembled in this way, the flexible connection part is placed inside the rigid conductive component 12. As shown in the embodiments of Figure 2 and 3 , the extrusion between the annular surface of the rigid conductive component 12 and the special-shaped convex surface on the side of the flexible dry electrode 22 has been described in detail in the above embodiments and will not be elaborated here;

[0057] Or, the inner side of the rigid conductive component 12 has a special-shaped convex surface that is extruded with the cylindrical surface on the side of the flexible dry electrode 22 to form a connection. As shown in Figure 6 , the inner side of the rigid conductive component 12 can be designed as an arc-shaped, special-shaped or other shaped convex surface, and the flexible connection part of the flexible dry electrode 22 is cylindrical. When assembling, when the flexible connection part enters the electrode base 1 by extrusion, the convex surface on the inner side of the rigid conductive component 12 simultaneously extrudes the side cylindrical surface of the flexible connection part to form full contact.

[0058] (2) The bottom surface of the rigid conductive component 12 is extruded with the top of the flexible connection part of the flexible dry electrode 22 to form a connection

[0059] After being assembled in this way, the flexible connection part is placed under the rigid conductive component 12. The bottom surface of the rigid conductive component 12 forms a pressing connection with the top of the flexible connection part. That is, the top of the flexible connection part in contact with the rigid conductive component 12 can be designed as a plane or a relatively smooth convex surface, and the bottom surface of the rigid conductive component 12 can be designed as a convex surface or some relatively smooth protrusions. When the two are pressed, sufficient contact can be formed on the top of the flexible connection part.

[0060] As Figure 7 shown, the bottom surface of the rigid conductive component 12 is a plane, while the top of the flexible connection part of the flexible dry electrode 22 can be an arc surface or a special-shaped surface. During assembly, the arc surface or special-shaped surface of the flexible connection part presses against the bottom plane of the rigid conductive component 12 to form sufficient contact.

[0061] Furthermore, in an embodiment of the present utility model, both the assembly inlet on the electrode base 1 for assembling the flexible dry electrode 22 and the flexible connection part of the flexible dry electrode 22 can be set as rectangles. As Figure 8A shown, two first magnetic components 111 are provided on the electrode base 1, and are respectively fixed on both long sides of the assembly inlet inside the electrode base 1; correspondingly, as Figure 8B shown, two second magnetic components 21 are also provided on the flexible connection part, and are respectively fixed on both short sides of the flexible connection part. During assembly, after the flexible connection part is aligned and inserted into the assembly inlet of the electrode base, it will be rotated by 90°. Through the mutual attraction of the first magnetic component 111 and the second magnetic component 21, the rotation angle of the flexible connection part is limited, achieving the effect of stable connection.

[0062] Furthermore, in addition to the encapsulation injection molding in the above-mentioned embodiment for the combination of the flexible dry electrode 22 and the second magnetic attraction component 21, as Figure 9 shown, the second magnetic attraction component 21 can also be fixed on the connecting member 24 through glue or a clamping member 241, and then the connecting member 24 is clamped or adhesively bonded to the flexible dry electrode 22 through glue.

[0063] In addition, in addition to being directly connected to an external device through the wire 3, the rigid conductive component 12 can also be provided with a signal interface (the signal interface can select any feasible method) connected to the rigid conductive component 12 on the electrode base 1. The external device is connected to the flexible dry electrode device through this signal interface to transmit the detected electroencephalogram signal.

[0064] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A magnetic adsorption flexible dry electrode device, characterized in that, It includes an electrode base and a flexible dry electrode; The electrode base internally houses a rigid conductive component and a first magnetic component; The flexible dry electrode includes a flexible connecting portion and a flexible claw portion that contacts the head. The flexible connecting portion internally houses a second magnetic component, and the magnetic property of the second magnetic component is opposite to that of the first magnetic component; During assembly, under the mutual attraction of the two magnetic components, the flexible connecting portion aligns with the electrode base and enters it by extrusion to contact the rigid conductive component. The rigid conductive component transmits the electroencephalogram signal sensed by the flexible claw portion; 2. The magnetically attracted flexible dry electrode device according to claim 1, wherein When the flexible connecting portion is extruded into the interior of the electrode base, its side or top fits with the rigid conductive component; 3. The magnetic adsorption flexible dry electrode device according to claim 1, characterized in that At least one protruding connecting piece is provided on the rigid conductive component. During assembly, the protruding connecting piece contacts the flexible connecting piece fully by extrusion; 4. The magnetically-attracted flexible dry electrode device according to claim 1, characterized in that, A signal interface connected to the rigid conductive component is provided on the electrode base. An external device is connected to the flexible dry electrode device through this signal interface; 5. The magnetic adsorption flexible dry electrode device according to claim 1, wherein The second magnetic component is buried in the flexible dry electrode; or the second magnetic component is attached to the surface of the flexible dry electrode through a connecting piece; 6. The magnetic adsorption flexible dry electrode device according to claim 1, wherein A card slot is provided between the flexible connecting portion and the flexible claw portion of the flexible dry electrode. During assembly, the bottom of the electrode base is clamped in this card slot; 7. The magnetically attracted flexible dry electrode device according to claim 1, wherein, A cavity is provided in the electrode base. A push plate for installing the first magnetic component is provided therein. An elastic member is provided above the push plate. The rigid conductive component is looped below the cavity; when the flexible dry electrode is not assembled, the elastic member pushes the push plate to the bottom of the electrode base; when the flexible dry electrode is assembled, the flexible connecting portion is adsorbed to the push plate under the magnetic action and pushes the push plate to move upward into the cavity under the thrust to contact the rigid conductive component; 8. The magnetically attracted flexible dry electrode device according to claim 1, wherein A cavity is provided in the electrode base. A push plate for installing the first magnetic component is provided therein. An elastic member is provided above the push plate. Multiple claw-like tentacle-shaped rigid conductive components are provided at the bottom of the push plate. Multiple corresponding card slots are provided on the flexible connecting portion of the flexible dry electrode; when the flexible dry electrode is not assembled, the elastic member pushes the push plate to the bottom of the electrode base; when the flexible dry electrode is assembled, the flexible connecting portion is adsorbed to the push plate under the magnetic action and pushes the push plate to move upward into the cavity under the thrust, and the rigid conductive components are inserted into the corresponding card slots of the flexible connecting portion; 9. The magnetically attracted flexible dry electrode device according to claim 1, wherein, A wire groove is provided on the rigid conductive component. The wire connected to the rigid conductive component is placed in this wire groove and connected to the outside; 10. The magnetically attracted flexible dry electrode device according to any one of claims 1-8, characterized in that, The portion of the flexible claw portion that contacts the head is additionally coated with a conductive layer having a higher conductivity than the flexible dry electrode body;

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