Brain-computer interface electrode connection structure

Abstract

The utility model discloses a kind of brain-computer interface electrode connection structures, comprising: signal acquisition device ontology, connecting part, electrode;Acquisition device ontology is connected with connecting part, first recess is provided in the part of acquisition device ontology and connecting part interconnect;Electrode is provided with connecting hole, first fixing device is provided in connecting hole;Connecting part is detachably inserted into connecting hole, first fixing device is clamped into first recess, first fixing device is resisted to the groove wall of first recess;Connecting part outer wall or the surface of first recess is coated with conductive material, connecting hole inner wall or first fixing device is provided with conductive terminal, and conductive material is tightly attached with conductive terminal.The above-mentioned brain-computer interface electrode connection structure can solve the problems in the prior art, such as the brain-computer interface electrode connection structure cannot quickly realize detachable connection, the comfort level is low, the cost is high, the signal is unstable and the like.

Description

Technical Field

[0001] This utility model relates to the field of brain-computer interfaces, and in particular to a brain-computer interface electrode connection structure. Background Technology

[0002] Brain-computer interface (BCI) is a communication pathway that establishes a direct link between the human brain and an external device. Its working principle typically involves the acquisition, analysis, and conversion of brain electrical activity signals into control commands. Non-invasive BCIs, without surgery, use an EEG signal acquisition device placed in the head to establish communication between the brain and an external device. The EEG signal acquisition device usually consists of electrodes and a main body; the electrodes are in direct contact with the body to acquire EEG signals and transmit them to the main body.

[0003] In existing technologies, there are generally four ways to connect electrodes to the signal acquisition device body. The first is the embedded method, where the electrode and the signal acquisition device body are integrally formed, or the electrode is embedded into the signal acquisition device body using technologies such as 3D printing. With this method, the electrode is often not replaceable, which cannot meet the needs of electrode removal in some medical or wearable scenarios. Furthermore, if the electrode is damaged, the entire device must be replaced, resulting in wasted costs. The second method is the welding connection method, where the electrode is welded and fixed to the signal acquisition device body. This method also cannot achieve immediate detachment. During signal acquisition, repeated pressure on the human head can cause the weld points to loosen over time, leading to poor contact. The third method is the snap-on installation method, where the electrode and the signal acquisition device body are connected using snaps. However, the tolerance control of metal snaps is difficult, and defects such as jamming due to interference fits or loosening due to clearance fits are easily encountered during mass production. The fourth method is the magnetic attraction method, where the electrode is attracted to the signal acquisition device body by a magnet. The magnetic attraction method is relatively weak, and the electrode and the signal acquisition device body are prone to sliding displacement, thus causing measurement errors. In the above connection methods, the metal parts of some electrodes are directly attached to human skin, which can easily cause pressure pain or discomfort due to low temperature.

[0004] Therefore, a stable, reliable, easy-to-disassemble, and comfortable electrode connection structure is needed in brain-computer interface signal acquisition devices.

[0005] The above information is presented as background information only to aid in understanding this utility model. No confirmation or other representation is made regarding whether any of the above constitutes prior art application related to this utility model. Utility Model Content

[0006] This invention addresses the problems of the aforementioned brain-computer interface electrode connection structures, such as the inability to quickly achieve detachable connections, low comfort, high cost, high environmental sensitivity, poor durability, and inability to flexibly configure according to specific shapes. It provides a brain-computer interface electrode connection structure that allows for quick disassembly and replacement, comfortable wear, easy cleaning, stable signal, and is less prone to loosening that could lead to measurement errors. This electrode connection structure allows for customization of the electrode's shape and covering material, improving wearing comfort. It can be repeatedly disassembled and reassembled as needed, when the electrode is damaged, or when cleaning is required. In the connected state, this electrode connection structure offers the advantages of a stable connection, resistance to loosening, and stable signal.

[0007] The first aspect of this utility model provides a brain-computer interface electrode connection structure, comprising: a signal acquisition device body, a connecting part, and electrodes; characterized in that the acquisition device body is connected to the connecting part, and a first groove is provided at the connection point between the acquisition device body and the connecting part; a connecting hole is provided on the electrode, and a first fixing device is provided in the connecting hole; the connecting part is detachably inserted into the connecting hole, and the first fixing device is engaged in the first groove, abutting against the groove wall of the first groove; the outer wall of the connecting part is covered with a conductive material, and a conductive terminal is provided on the inner wall of the connecting hole, the outer wall of the connecting part covered with conductive material is tightly fitted with the conductive terminal provided on the inner wall of the connecting hole, or the surface of the first groove is covered with conductive material, the first fixing device is provided with a conductive terminal, and the surface of the first groove covered with conductive material is tightly fitted with the conductive terminal provided on the first fixing device.

[0008] For example, in at least one embodiment, the connecting hole is a through hole, and the connecting portion passes through the connecting hole.

[0009] For example, in at least one embodiment, the first fixing device is disposed on the upper surface of the electrode; the connecting portion further includes a second groove, and the electrode further includes a second fixing device disposed on its lower surface, the second fixing device being engaged in the second groove and abutting against the groove wall of the second groove; the first fixing device and the second fixing device are elastic.

[0010] For example, in at least one embodiment, the connecting hole is a blind hole, and the connecting part is embedded in the blind hole.

[0011] For example, in at least one embodiment, the electrode is spherical, drum-shaped, or cube-shaped.

[0012] For example, in at least one embodiment, the signal acquisition device body, the connecting part, and the first groove are integrally formed; or, the signal acquisition device body and the connecting part are connected by welding; or, the signal acquisition device body and the connecting part are connected by adhesive bonding; or, the signal acquisition device body and the connecting part are connected by threads.

[0013] For example, in at least one embodiment, the signal acquisition device body is disposed on the human head, with both ends connected to the two connecting parts respectively, and the two connecting parts connected to the two electrodes respectively; the two electrodes are respectively disposed in the area behind the human ears.

[0014] For example, in at least one embodiment, the signal acquisition device body is disposed on the human head, and the corresponding connecting part is disposed in the area covered by human hair; the electrode is a claw-shaped electrode and is disposed in the area corresponding to the connecting part.

[0015] For example, in at least one embodiment, the electrode is coated with a biocompatible conductive material.

[0016] For example, in at least one embodiment, the signal acquisition device body is elastic. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0018] Figure 1 This is a schematic diagram of the first component structure according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of a first component structure according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the second component structure according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of a third component structure according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the fourth component structure according to an embodiment of the present utility model;

[0023] Figure 6 This is a schematic diagram of the fourth component structure assembly according to an embodiment of the present utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] In this utility model, "multiple" refers to two or more.

[0027] According to an embodiment of the present invention, Figure 1 and Figure 2 A brain-computer interface electrode connection structure is disclosed, comprising: a signal acquisition device body 1, a connecting part 2, a first fixing device 3, an electrode 4, and a first groove 5. The acquisition device body 1 is connected to the connecting part 2, and the first groove 5 is provided at the connection point between the acquisition device body 1 and the connecting part 2. The electrode 4 is provided with a connection hole 6, and the first fixing device 3 is disposed in the connection hole 6. The signal acquisition device body 1 and the electrode 4 are detachably connected through the connecting part 2. The unconnected state of this connection structure is as follows: Figure 1 As shown. When the signal acquisition device body 1 is connected to the electrode 4, the connecting part 2 passes through the connecting hole 6 provided on the electrode 4, and the first groove 5 reaches the position corresponding to the first fixing device 3. By forcefully pushing the first fixing device 3 into the first groove 5, so that the first fixing device 3 abuts against the groove wall of the first groove 5, a stable connection can be achieved. The state after connection is as shown. Figure 2 As shown. When disassembling electrode 4, pull electrode 4 away from the main body 1 of the acquisition device, causing the first fixing device 3 to disengage from the first groove 5, and the main body 1 of the acquisition device and electrode 4 to return to the original position. Figure 1The diagram shows the unconnected state. This structure allows for repeated point-to-point disassembly and reassembly. The detachable design facilitates electrode replacement and cleaning while ensuring connection stability.

[0028] Preferably, the outer wall of the connecting part 2 is covered with conductive material, and the inner wall of the connecting hole 6 is provided with conductive terminals. The outer wall of the connecting part 2 covered with conductive material is closely fitted with the conductive terminals provided on the inner wall of the connecting hole 6 to realize the electrical connection between the acquisition device body 1 and the electrode 4.

[0029] Preferably, the surface of the first groove 5 is covered with a conductive material, and the first fixing device 3 is provided with a conductive terminal. The surface of the first groove 5 covered with conductive material is closely fitted with the conductive terminal provided on the first fixing device 3 to realize the electrical connection between the acquisition device body 1 and the electrode 4.

[0030] Figure 2 To more clearly demonstrate the mating position of the first fixing device 3 and the first groove 5, a gap is provided at the connection point. In a preferred embodiment, the outer wall of the connecting part 2 and the inner wall of the connecting hole 6 are tightly fitted together, abutting against each other, and their relative positions do not change. This helps to generate greater friction between the connecting part 2 and the connecting hole 6, increasing the stability of the connection structure. It also helps to ensure the stability of the measurement signal transmission and eliminate measurement errors caused by electrode movement.

[0031] Preferred, such as Figure 3 As shown, the connecting hole 6 is a through hole, and the connecting part 2 passes through the connecting hole 6. The first fixing device 3 is disposed on the upper surface of the electrode and is engaged with the first groove 5 during connection. The connecting part 2 also includes a second groove 8, and the electrode 4 also includes a second fixing device 7 disposed on its lower surface. During connection, the second fixing device 7 is engaged with the second groove 8 and abuts against the groove wall of the second groove 8. The second fixing device 7 and the second groove 8 cooperate with each other to further improve the strength and stability of the connection.

[0032] Preferably, the first fixing device 3 and the second fixing device 7 are elastic. The elastic structure of the first fixing device 3 and the second fixing device 7 facilitates smoother installation and disassembly.

[0033] Preferably, the connecting hole 6 is a blind hole, and the connecting part 2 is embedded in the blind hole. This structure helps to shorten the length of the connecting part 2 and achieve the desired overall external shape design of the electrode 4.

[0034] Preferred, such as Figure 4As shown, the outer end of the connecting part 2 is narrower and gradually widens towards the body 1 of the acquisition device. Correspondingly, the connecting hole 6 is wider at the opening and gradually narrows towards the inside of the electrode 4. This structural design facilitates the rapid insertion of the connecting part 2 into the connecting hole 6 in scenarios requiring quick connection. Simultaneously, when the first fixing device 3 engages with the first groove 5, preferably, the connecting part 2 and the connecting hole 6 exhibit an interference fit based on their surface elasticity. At this time, there is significant friction between the connecting part 2 and the connecting hole 6, which helps to strengthen the connection and prevent loosening.

[0035] In the embodiments of this disclosure, the shape of the electrodes is not limited in any way and can be set as needed. Figure 1 and Figure 2 In the illustrated embodiment, preferably, the signal acquisition device body 1 is a head-mounted device, and the electrode 4 is located behind the human ear. Preferably, the electrode 4 is spherical, drum-shaped, or square-shaped. By adjusting the shape and size of the electrode 4, it can be secured by the natural shape behind the human ear when the head-mounted device of the signal acquisition device body 1 is worn. This ensures contact between the electrode 4 and the human body, and also makes the head-mounted device less likely to fall off.

[0036] Preferably, the signal acquisition device body 1, the connecting part 2, and the first groove 5 are integrally formed, and the process for achieving this integral structure can be any existing processing technology such as injection molding or 3D printing. The integral molding process allows the product to have better overall integrity and offers higher dimensional accuracy and processing efficiency.

[0037] Preferably, the signal acquisition device body 1 and the connecting part 2 are processed into two parts, and connected into a whole by one or more of the following processes: welding, bonding, and threaded connection.

[0038] Preferably, the outer surface of electrode 4 is coated with a biocompatible conductive material. This helps to prevent the metal electrode from directly contacting the human body, thus avoiding sensory discomfort for the user. At the same time, the fully coated electrode 4 can effectively prevent sweat residue, and the contact parts of the product are also easier to clean.

[0039] Preferably, the signal acquisition device body 1 is elastic, which helps absorb micro-vibrations generated by movement, improving comfort and signal stability. The signal acquisition device body 1 is designed to be easily worn on the human head, thus integrating into a head-mounted device, for example, shaped like a hair clip or glasses. One end connected to the electrode 4 rests against the area behind the ear, while the other end without the electrode connection is designed in a certain shape to rest against the corresponding area on the opposite side of the body. The structure and elasticity of the head-mounted device ensure compatibility with most subjects, preventing slippage and misalignment between the electrode 4, the connecting part 2, and the signal acquisition device body 1 due to external factors. In this structure, the electrode 4 also functions as a retaining ring for the legs of a hair clip or glasses, preventing it from falling off during wear, and also ensuring closer contact between the electrode 4 and the skin for better acquisition of brain signals.

[0040] According to an embodiment of the present invention, Figure 5 and Figure 6 Another brain-computer interface electrode connection structure is disclosed, which also includes: a signal acquisition device body 1, a connecting part 2, a first fixing device 3, an electrode 4, and a first groove 5. The electrode 4 includes multiple conductive fingers 41 and an electrode body 42, with the conductive fingers 41 surrounding and connected to the electrode body 42 to form a claw-shaped electrode structure. A connecting hole 6 is provided on the electrode body 42; the connecting hole 6 is a through hole, and the first fixing device 3 is disposed in the connecting hole 6. The connecting part 2 passes through the connecting hole 6, and the first groove 5 reaches the corresponding position of the first fixing device 3. Figure 5 The diagram shows the state before installation. During connection, the first fixing device 3 is pushed forcefully into the first groove 5, so that the first fixing device 3 abuts against the groove wall of the first groove 5, thus achieving the desired connection. Figure 6 The connection state is shown. To disassemble the electrode, pull electrode 4 away from the main body 1 of the data acquisition device, causing the first fixing device 3 to disengage from the first groove 5, thus achieving disassembly. This detachable design facilitates electrode replacement and cleaning while ensuring connection stability. Figure 6 In the connection structure shown, both the connector 2 and the electrode 4 are located in the area covered by human hair. The claw-shaped electrode facilitates penetration through the human hair and contact with the scalp for measurement. Simultaneously, multiple electrode fingers 41 enable multi-channel signal acquisition, ensuring that poor signal quality in individual channels does not affect the overall signal acquisition effect.

[0041] The following points also need to be explained:

[0042] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment, and other structures can refer to the general design.

[0043] (2) For clarity, the thickness of devices, layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0044] (3) Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0045] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A brain-computer interface electrode connection structure, comprising: Signal acquisition device body, connecting part, electrodes; Its characteristic is that the main body of the acquisition device is connected to the connecting part, and a first groove is provided at the part where the main body of the acquisition device and the connecting part are connected to each other; The electrode is provided with a connection hole, and a first fixing device is provided in the connection hole; The connecting part is detachably inserted into the connecting hole, the first fixing device is snapped into the first groove, and the first fixing device abuts against the groove wall of the first groove. The outer wall of the connecting part is covered with conductive material, and the inner wall of the connecting hole is provided with conductive terminals. The outer wall of the connecting part covered with conductive material is in close contact with the conductive terminals provided on the inner wall of the connecting hole. The surface of the first groove is covered with a conductive material, and the first fixing device is provided with a conductive terminal. The surface of the first groove covered with the conductive material is in close contact with the conductive terminal provided on the first fixing device.

2. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The connecting hole is a through hole, and the connecting part passes through the connecting hole.

3. The brain-computer interface electrode connection structure according to claim 2, characterized in that, The first fixing device is disposed on the upper surface of the electrode; The connecting part further includes a second groove, and the electrode further includes a second fixing device disposed on its lower surface. The second fixing device is inserted into the second groove and abuts against the groove wall of the second groove. The first fixing device and the second fixing device are elastic.

4. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The connecting hole is a blind hole, and the connecting part is embedded in the blind hole.

5. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The electrode is spherical, drum-shaped, or square-shaped.

6. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The signal acquisition device body, the connecting part, and the first groove are integrally formed as a whole structure; Alternatively, the signal acquisition device body and the connecting part are connected by welding; Alternatively, the signal acquisition device body and the connecting part are connected by adhesive bonding; Alternatively, the signal acquisition device body and the connecting part are connected by a thread.

7. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The main body of the signal acquisition device is set on the human head, with both ends connected to the two connecting parts respectively, and the two connecting parts connected to the two electrodes respectively. The two electrodes are respectively positioned behind the ears of the human body.

8. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The main body of the signal acquisition device is set on the human head, and the connecting part is set in the area covered by human hair. The electrode is a claw-shaped electrode and is disposed in the area corresponding to the connecting portion.

9. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The electrode is coated with a biocompatible conductive material.

10. The brain-computer interface electrode connection structure according to claim 1, characterized in that, The signal acquisition device body is elastic.

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