Saline water electrode structure of electroencephalogram cap

Abstract

A saline water electrode structure of an electroencephalogram cap comprises a silicon rubber case, a water absorption part and an electrode plate, wherein the upper end of the silicon rubber case is fixed on electroencephalogram cap skin, and the lower end of the silicon rubber case is provided with an assembly opening; the lower end of the water absorption piece extends out of the assembly opening; the electrode plate is attached to the upper end face of the water absorption piece and electrically connected with the electrode wire penetrating into the silicon rubber case. A water supplementing hole is formed in the side wall of the silicon rubber sleeve, and the side surface of the water absorption piece covers the water supplementing hole on the inner side. According to the embodiment of the utility model, the water replenishing hole is formed in the side surface of the silicon rubber case, and the water absorbing piece positioned in the silicon rubber case covers the water replenishing hole on the inner side, so that saline water replenished through the water replenishing hole can be directly and quickly absorbed by the water absorbing piece, the saline water replenishing speed is high, and the problem that a user is wetted due to overflow of the water replenishing hole is difficult to cause; the water replenishing hole is located below the electroencephalogram cap skin, when the user wears the electroencephalogram cap, hair can shield the water replenishing hole to a certain degree, the speed of water diffusing through the water replenishing hole is reduced, and the moisturizing effect is further improved.

Description

Technical Field

[0001] This invention belongs to the field of electroencephalography (EEG) monitoring technology, and particularly relates to a saline electrode structure for an EEG cap. Background Technology

[0002] Electroencephalography (EEG) is a non-invasive electrophysiological monitoring method that records brain electrical activity. Electrodes are placed along the scalp, and multiple electrodes placed on the scalp record the brain's spontaneous electrical activity over a period of time. Clinically, it is used to diagnose epilepsy, sleep disorders, depth of anesthesia, coma, encephalopathy, and brain death. It also provides a tool for assessing brain activity in experimental psychology and is a neuroimaging method widely used in computational neuroscience.

[0003] Currently, the principles used in EEG acquisition systems on the market are largely similar, with the biggest differences lying in the electrodes and their anti-interference capabilities. Common electrodes include dry electrodes and wet electrodes. Wet electrodes, which are commonly used, reduce the impedance between the electrode and the skin by applying conductive gel or saline solution to the scalp. Although this type of electrode provides better signal quality, it requires the application of conductive gel or saline solution before the EEG cap with electrodes is worn on the body, which is time-consuming and inconvenient to operate.

[0004] Saline electrodes require no special treatment of the scalp to achieve rapid and effective signal acquisition, overcoming the inconveniences of commonly used wet electrodes. However, currently available saline electrodes have poor water retention, making it impossible to replenish saline during monitoring. This leads to a decrease in saline volume, an increase in impedance, and ultimately, ineffective monitoring. To address this issue, existing technology, "Saline Electrode Cap for Long-Term EEG Monitoring" (publication number CN219021209U), discloses a saline electrode cap with a replenishment hole in its electrode structure, through which saline can be replenished. However, in this type of saline electrode cap, the electrode sheet covers the top surface of the absorbent and blocks the inner end of the replenishment hole. This causes the replenished saline to slowly seep down into the absorbent through the gap between the electrode sheet and the inner end of the replenishment hole. This slow replenishment of saline to the absorbent fails to meet monitoring requirements, and the replenished saline easily fills and overflows the replenishment hole, splashing water onto the user's head and resulting in a poor user experience. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a saline electrode structure for an EEG cap, which solves the problems of slow saline replenishment and easy splashing that wets the user in current EEG cap motor structures.

[0006] This utility model provides a saline electrode structure for an EEG cap, comprising:

[0007] The silicone sleeve is fixed to the EEG cap skin at its upper end and has an assembly opening at its lower end.

[0008] The absorbent component is installed inside a silicone sleeve, with its lower end protruding through an assembly opening.

[0009] The electrode pads are attached to the upper surface of the absorbent component and electrically connected to the electrode wires inserted into the silicone sleeve.

[0010] The silicone sleeve has water inlet holes on its side wall, and the water inlet holes are covered on the inner side of the absorbent component's side surface.

[0011] In some embodiments, it further includes:

[0012] The mounting base is located inside the silicone sleeve. The mounting studs on its upper end face pass through the silicone sleeve and the EEG cap skin in sequence, and the electrode pads are mounted on the lower end face of the mounting base.

[0013] The mounting cap is threaded to the mounting stud through a threaded hole. When the mounting cap is tightened, it presses against the upper surface of the EEG cap skin and causes the mounting base to press and fix the silicone sleeve to the lower surface of the EEG cap skin.

[0014] In some embodiments, the lower end face of the mounting base has a downwardly inclined mounting portion, on which the electrode sheet is mounted.

[0015] In some embodiments, the assembly is located on the side away from the water inlet hole, so that the electrode sheet is radially aligned with the water inlet hole.

[0016] In some embodiments, the electrode sheet is embedded in a mounting groove provided in the assembly part, and the lower surface of the electrode sheet is flush with the lower surface of the assembly part.

[0017] The mounting slot is connected to the wiring hole provided on the mounting base, and the electrode wire extends into the wiring hole and connects to the electrode plate.

[0018] In some embodiments, the absorbent element includes cotton and foam arranged sequentially, with the lower surface of the cotton attached to the upper surface of the foam.

[0019] In some embodiments, a limiting hole is provided on the lower end face of the mounting base, and a limiting head provided on the upper end face of the water suction component is inserted upward into the limiting hole.

[0020] In some embodiments, the assembly opening is provided with barbs that engage with the absorbent component.

[0021] In some embodiments, the lower part of the silicone sleeve is flared, with the outer diameter gradually increasing from top to bottom.

[0022] In some embodiments, the lower part of the absorbent element covers the lower end face of the silicone sleeve, and the lower surface of the absorbent element is a downwardly convex arc shape.

[0023] Compared with the prior art, the beneficial effects of this application are as follows: In the embodiment of this utility model, a water replenishment hole is opened on the side of the silicone sleeve, and the water-absorbing component located inside the silicone sleeve covers the water replenishment hole on the inner side, so that the saline solution replenished through the water replenishment hole can be directly and quickly absorbed by the water-absorbing component. The saline solution replenishment speed is fast, and it is difficult to cause the water replenishment hole to overflow and wet the user. In addition, the water replenishment hole is located under the skin of the EEG cap. When the user wears the EEG cap, the hair will block the water replenishment hole to a certain extent, reducing the speed of water evaporation through the water replenishment hole, further improving the moisturizing effect. This solves the problem that the current EEG cap motor structure has slow replenishment and easy splashing that wets the user when replenishing saline solution. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the saline electrode structure of the EEG cap of this utility model;

[0026] Figure 2 This is a cross-sectional view of the saline electrode structure of the EEG cap of this utility model;

[0027] Figure 3 This is a schematic diagram of the mounting base in the saline electrode structure of the EEG cap of this utility model.

[0028] In the picture:

[0029] 1. Silicone sleeve; 11. Assembly opening; 12. Water inlet hole; 13. Barb;

[0030] 2. Absorbent components; 21. Cotton; 22. Foam;

[0031] 3. Electrode pads; 4. EEG cap skin; 5. Electrode wires;

[0032] 6. Mounting base; 61. Mounting stud; 62. Assembly part; 63. Mounting slot; 64. Wiring hole; 65. Limiting hole;

[0033] 7. Install the cap. Detailed Implementation

[0034] The technical solutions in 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 a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] like Figures 1 to 2 As shown in the schematic embodiment of the saline electrode structure of the EEG cap of this utility model, the saline electrode structure of the EEG cap includes a silicone sleeve 1, an absorbent element 2, and an electrode sheet 3.

[0039] The upper end of the silicone sleeve 1 is fixed to the EEG cap skin 4, and the lower end of the silicone sleeve 1 has an assembly opening 11, allowing the silicone sleeve 1 to open downwards. An absorbent component 2 is installed inside the silicone sleeve 1, with its lower end extending outwards through the assembly opening 11 to contact the user's scalp. Electrode pads 3 are installed inside the silicone sleeve 1 and attached to the upper surface of the absorbent component 2. The electrode pads 3 are electrically connected to the electrode wires 5 inserted into the silicone sleeve 1. A water replenishment hole 12 is provided on the side wall of the silicone sleeve 1, and the side surface of the absorbent component 2 covers the water replenishment hole 12 on its inner side.

[0040] The absorbent component 2 is used to draw in saline solution, allowing the electrode pad 3 to contact the patient's scalp through the saline solution for electroencephalogram (EEG) monitoring. When the saline solution in the absorbent component 2 is insufficient, a dropper is used to draw in saline solution. The tip of the dropper is inserted into the water replenishment hole 12, and the cap of the dropper is squeezed to deliver the drawn saline solution into the water replenishment hole 12. Because the absorbent component 2 covers the water replenishment hole 12 from the inside, the saline solution entering the water replenishment hole 12 can be quickly and directly absorbed by the absorbent component 2, completing the saline solution replenishment. The saline solution will not overflow from the water replenishment hole 12 due to slow absorption, thus preventing the saline solution from wetting the user.

[0041] When a user wears the EEG cap, the lower end of the absorbent part 2 is attached to the user's scalp. The user's hair usually extends upwards to the upper side of the EEG cap skin 4. Since the water inlet 12 is located on the lower side of the EEG cap skin 4 and on the side of the silicone sleeve 1, the user's hair usually covers the water inlet 12 to a certain extent, thereby reducing moisture loss and improving the moisturizing effect. This allows the EEG cap to maintain effective data acquisition for a longer period of time. When water needs to be added, the user can simply part the hair to expose the water inlet 12 and insert the dropper.

[0042] In the above illustrative embodiment, the saline electrode structure of the EEG cap has a water replenishment hole 12 on the side of the silicone sleeve 1. The absorbent component 2 located inside the silicone sleeve 1 covers the water replenishment hole 12 on the inside, so that the saline replenishment through the water replenishment hole 12 can be directly and quickly absorbed by the absorbent component 2. The saline replenishment speed is fast, and it is unlikely to cause the water replenishment hole 12 to overflow and wet the user. In addition, the water replenishment hole 12 is located under the EEG cap skin 4. When the user wears the EEG cap, the hair will block the water replenishment hole 12 to a certain extent, reducing the speed at which water evaporates through the water replenishment hole 12, further improving the moisturizing effect. This solves the problem that the current EEG cap motor structure has slow saline replenishment and is prone to splashing and wetting the user.

[0043] In some embodiments, the saline electrode structure of the EEG cap further includes a mounting base 6 and a mounting cap 7.

[0044] like Figure 3 As shown, the mounting base 6 is located inside the silicone sleeve 1. A mounting stud 61, located on the upper end face of the mounting base 6, passes through the silicone sleeve 1 and the EEG cap 4 sequentially, extending upwards. The electrode pads 3 are mounted on the lower end face of the mounting base 6. The mounting cap 7 is threadedly connected to the mounting stud 61 through a threaded hole. When the mounting cap 7 is tightened, it presses against the upper surface of the EEG cap 4, and the mounting base 6 presses and fixes the silicone sleeve 1 to the lower surface of the EEG cap 4, thus achieving a fixed connection between the silicone sleeve 1 and the EEG cap 4.

[0045] Remove the mounting cap 7 from the mounting stud 61, then pull the EEG cap skin 4 out from top to bottom. Remove the silicone sleeve 1 from the EEG cap skin 4. This makes electrode installation and removal convenient, facilitating component replacement and maintenance. The mounting base 6 not only secures the silicone sleeve 1 but also the electrode pads 3, pressing them against the absorbent component 2 to maintain tight contact and ensure stable electrical signal transmission.

[0046] In some embodiments, the lower end face of the mounting base 6 has a downwardly inclined mounting portion 62, on which the electrode plate 3 is mounted. A portion of the lower end face of the mounting base 6 is configured as an inclined surface, which minimizes the height of the mounting base 6, allowing the space within the silicone sleeve 1 to accommodate a larger volume of the absorbent component 2, thereby increasing the total water absorption capacity of the absorbent component 2 and extending the effective conduction time of the absorbent component 2. Furthermore, the electrode plate 3 is mounted on the inclined surface, allowing it to have a larger radial length while maintaining the same radial space occupation, increasing the surface area of ​​the electrode plate 3 to enhance its contact area with the absorbent component 2 and improve signal acquisition stability.

[0047] In some embodiments, the assembly part 62 is located on the side away from the water inlet hole 12, so that the electrode plate 3 is radially aligned with the water inlet hole 12. The arrangement of the assembly part 62 reduces the axial thickness of one side of the mounting base 6, making room inside the water inlet hole 12, allowing the absorbent 2 to extend into this space and cover the inside of the water inlet hole 12, increasing the volume of the absorbent 2, and simultaneously raising the height of the water inlet hole 12, making it easier for the dropper to be inserted into the water inlet hole 12 to replenish saline solution. The electrode plate 3 is tilted with the assembly part 62, so that the lower surface of the electrode plate 3 faces the water inlet hole 12 to a certain extent, allowing the replenished saline solution to more easily wet the part of the electrode plate 3 that contacts the absorbent 2, quickly improving the conductivity between the electrode plate 3 and the absorbent 2, and enabling the electrode plate 3 to quickly restore stable electrical signal transmission to the scalp after water replenishment.

[0048] In some embodiments, the electrode plate 3 is embedded in the mounting groove 63 provided in the assembly part 62, and the lower surface of the electrode plate 3 is flush with the lower surface of the assembly part 62. The mounting groove 63 is connected to the wiring hole 64 provided in the mounting base 6, and the electrode wire 5 extends into the wiring hole 64 and connects to the electrode plate 3.

[0049] The electrode plate 3 is embedded and flush with the lower end face of the mounting base 6. This ensures that the electrode plate 3 is securely installed while preventing it from taking up additional space inside the silicone sleeve 1, thus increasing the volume of the absorbent component 2, increasing water absorption, and extending the duration of stable signal transmission. The mounting groove 63 also facilitates the connection of the electrode wire 5, thereby concealing the connection point between the electrode wire 5 and the electrode plate 3 internally, preventing corrosion from contact with salt water, and ensuring a stable connection between the electrode wire 5 and the electrode plate 3 for a long time.

[0050] In some embodiments, the absorbent component 2 includes cotton 21 and foam 22, arranged one above the other, with the lower surface of cotton 21 adhering to the upper surface of foam 22. Cotton 21 is positioned on the upper side, and foam 22 on the lower side, so that cotton 21 covers the water inlet hole 12, while foam 22 contacts the scalp. Cotton 21 is relatively soft, resulting in better absorbency, quickly absorbing the saline solution entering through the water inlet hole 12 and preventing saline solution from overflowing and wetting the user during hydration. Foam 22 is relatively hard, making it less prone to deformation under pressure after contact with the scalp, reducing deformation of the absorbent component 2 during EEG cap wear, preventing excessive deformation that could squeeze out saline solution, and ensuring that the saline solution remains in the absorbent component 2. Furthermore, since the bottom of the absorbent component 2 frequently contacts the scalp, it is prone to contamination, leading to decreased wire performance. Dividing the absorbent component 2 into cotton 21 and foam 22 allows foam 22 to be replaced as needed, while cotton 21 does not require replacement, saving replacement costs.

[0051] In some embodiments, a limiting hole 65 is provided on the lower end face of the mounting base 6, and a limiting head (not shown in the figure) provided on the upper end face of the absorbent 2 is inserted upward into the limiting hole 65, that is, the cotton 21 is inserted and connected to the mounting base 6. When it is necessary to replace the foam 22, the limiting insertion of the cotton 21 and the mounting base 6 makes it fixed and stable, and disassembling the foam 22 will not cause the cotton 21 to fall off or move.

[0052] In some embodiments, a barb 13 is provided on the assembly opening 11, and the barb 13 engages with the water-absorbing component 2. The barb 13 is tilted upward. After the water-absorbing component 2 is inserted into the silicone sleeve 1 from bottom to top, the barb 13 holds the water-absorbing component 2 in place, preventing it from falling out of the silicone sleeve 1, ensuring that the water-absorbing component 2 is in close contact with the electrode plate 3, thus ensuring both ease of installation and stability of signal transmission.

[0053] In some embodiments, the lower part of the silicone sleeve 1 is funnel-shaped with its outer diameter gradually increasing from top to bottom. The shape of the absorbent component 2 matches this shape, thereby ensuring that after the absorbent component 2 is inserted into the silicone sleeve 1, the sidewall of the absorbent component 2 can make close contact with the inner wall of the silicone sleeve 1 and be firmly fixed. Furthermore, the funnel-shaped silicone sleeve 1 increases the outer diameter of its bottom end, thereby increasing the surface area of ​​the bottom end of the absorbent component 2, increasing the contact area between the absorbent component 2 and the scalp, and improving the stability of signal transmission.

[0054] In some embodiments, the lower part of the absorbent component 2 covers the lower end face of the silicone sleeve 1, ensuring that the bottom end of the absorbent component 2 has a larger contact area with the scalp, thereby improving the stability of signal transmission. The lower surface of the absorbent component 2 is a downwardly convex arc shape, making it easier for the absorbent component 2 to contact the scalp, and under pressure and fixation, the shape of the lower surface of the absorbent component 2 matches the scalp, thereby ensuring a large contact area between the two and improving the stability of signal transmission.

[0055] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0056] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A saline electrode structure for an electroencephalography cap, characterized by, include: The silicone sleeve is fixed to the EEG cap skin at its upper end and has an assembly opening at its lower end. A water-absorbing component is installed inside the silicone sleeve, with its lower end extending through the assembly opening; The electrode sheet is attached to the upper surface of the absorbent component and electrically connected to the electrode wire inserted into the silicone sleeve. The silicone sleeve has a water inlet hole on its side wall, and the side surface of the absorbent component covers the water inlet hole on its inner side.

2. The saline electrode structure of an electroencephalogram cap according to claim 1, wherein, Further includes: The mounting base is located inside the silicone sleeve, and the mounting studs on its upper end face pass through the silicone sleeve and the EEG cap skin in sequence. The electrode pads are mounted on the lower end face of the mounting base. The mounting cap is threadedly connected to the mounting stud through a threaded hole. When the mounting cap is tightened, the mounting cap presses against the upper surface of the EEG cap skin, and the mounting base presses and fixes the silicone sleeve to the lower surface of the EEG cap skin.

3. The saline electrode structure of an electroencephalogram cap according to claim 2, wherein, The lower end face of the mounting base has a downwardly inclined assembly portion, and the electrode sheet is mounted on the assembly portion.

4. The saline electrode structure of an electroencephalogram cap according to claim 3, wherein The assembly part is located on the side away from the water inlet hole, so that the electrode plate is radially aligned with the water inlet hole.

5. The saline electrode structure of the electroencephalogram cap of claim 3, wherein, The electrode sheet is embedded in the mounting groove provided in the assembly part, and the lower surface of the electrode sheet is flush with the lower surface of the assembly part; The mounting slot is connected to the wiring hole provided on the mounting base, and the electrode wire extends into the wiring hole and connects to the electrode plate.

6. The saline electrode structure of an electroencephalogram cap according to claim 1, wherein, The absorbent component includes cotton and foam arranged sequentially from top to bottom, with the lower surface of the cotton attached to the upper surface of the foam.

7. The saline electrode structure of the EEG cap according to claim 2, characterized in that, A limiting hole is provided on the lower end face of the mounting base, and a limiting head provided on the upper end face of the water-absorbing component is inserted upward into the limiting hole.

8. The saline electrode structure of an electroencephalogram cap according to claim 1, wherein, The assembly opening is provided with a barb, which engages with the water-absorbing component.

9. The saline electrode structure of an electroencephalogram cap according to claim 1, wherein, The lower part of the silicone sleeve is flared, with the outer diameter gradually increasing from top to bottom.

10. The saline electrode structure of an electroencephalogram cap according to claim 1, wherein, The lower part of the absorbent component covers the lower end face of the silicone sleeve, and the lower surface of the absorbent component is a downwardly convex arc shape.

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