Head-mounted device for collecting forehead three-lead electroencephalogram signals

Abstract

The invention relates to the technical field of electroencephalogram signal acquisition, in particular to a forehead three-lead electroencephalogram signal acquisition head-mounted device, which comprises a head-mounted main body, an elastic braid and a signal connector, the same elastic braid is arranged at the two ends of the head-mounted main body, and a buckle shaped like a Chinese character'ri 'for adjusting the length of the elastic braid is movably arranged in the middle of the elastic braid; the head-mounted main body is provided with a protective socket assembly for outputting electric signals, and the signal connector is in magnetic attraction connection with the protective socket assembly; the protection socket assembly comprises a magnetic attraction sheet for outputting an electric signal and a pressure reduction buffer output module, and is used for reducing the wearing pressure of the head-mounted device; the signal connector comprises an elastic output module used for receiving electric signals and a magnetic sheet. According to the head-mounted device for forehead three-lead electroencephalogram signal collection, comfort collection of the head-mounted device for forehead three-lead electroencephalogram signal collection is achieved, extrusion of the head-mounted device to the head of a wearer is relieved, and the pressed head is prevented from affecting detection of electrical signal data.

Description

Technical Field

[0001] The present invention relates to the technical field of electroencephalogram (EEG) signal acquisition, and specifically to a head-mounted device for acquiring three-lead EEG signals at the forehead. Background Art

[0002] EEG signals are electrical signals generated by the activity of brain neurons. By collecting and analyzing these signals, we can obtain information about the user's psychological state, such as depression, anxiety, etc. Electroencephalogram (EEG): Weak electrical signals generated by brain neuron activity, which can be captured through scalp electrodes to reflect the functional state of the brain. Three-lead acquisition: Use three electrodes (usually two recording electrodes and one reference electrode) to synchronously collect EEG data from the forehead area. Recording electrodes: Placed in the target area of ​​the forehead (such as international 10-20 electrode sites such as Fp1 and Fp2) to capture local EEG activity. Reference electrodes: Usually placed in relatively stable areas such as the earlobe (A1, A2) or mastoid as a potential reference. The EEG signal acquisition device is connected to the transmission line to act on the signal collector to record EEG signals.

[0003] At present, when collecting three-channel EEG signals, elastic rubber bands and nylon ropes with Velcro are mostly used to put the headset on the wearer's head. However, when worn for a long time, the headset will squeeze the wearer's head. The sockets and external connectors are mostly made of hard materials. The protruding structure of the socket has a large pressure, which will excessively squeeze the wearer, causing discomfort and inconvenience for users with different head circumferences. The through-type plug-in and unplugging of the sockets and connectors makes it difficult to insert them directly during use, which has poor applicability and does not provide a good user experience. Based on the above reasons, it is necessary to design a comfortable and comprehensive forehead three-channel EEG signal collection headset. Summary of the Invention

[0004] The purpose of the present invention is to provide a head-mounted device for collecting three-channel EEG signals from the forehead to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A head-mounted device for collecting three-lead EEG signals from the forehead, comprising a head-mounted body, an elastic webbing, and a signal connector. The head-mounted body is provided with a single elastic webbing at both ends, and a Japanese-shaped buckle is movably provided in the middle of the elastic webbing for adjusting its length. A protective socket assembly for outputting electrical signals is provided on the head-mounted body, and the signal connector is magnetically connected to the protective socket assembly. The protective socket assembly includes a magnetic sheet for outputting electrical signals and a pressure-reducing buffer output module, which is used to reduce the wearing pressure of the head-mounted device; The signal connector includes an elastic output module for receiving electrical signals and a magnetic sheet. The elastic output module includes a plurality of elastic metal contacts distributed at equal intervals.

[0006] Preferably, the number of the magnetic sheets and the magnetic sheets is the same, and the magnetic sheets and the magnetic sheets are relatively distributed, so as to protect the magnetic connection between the socket assembly and the signal connector.

[0007] Preferably, the headband main body includes a sponge layer, an EVA layer, an elastic lining and an elastic fabric. The sponge layer and the EVA layer are arranged inside the headband main body from the inside to the outside, and the elastic lining and the elastic fabric are covered on the outside of the headband main body from the inside to the outside, thereby increasing the overall comfort of the headband main body.

[0008] Preferably, both ends of the head-mounted body are provided with outwardly extending behind-the-ear electrodes, three pressure pads are embedded on the inner side of the front end of the head-mounted body, a fixing seat is provided in the middle of the outer side of the pressure pad, and a four-button is clamped on the outer side of the fixing seat, and the same forehead gasket is provided on the outer side of the three four-buttons, and the forehead gasket is fitted with the inner side of the head-mounted body, and the forehead gasket is provided with a forehead electrode sheet connected to the four-button for forehead compression protection.

[0009] Preferably, an annular groove is provided on the inner side of the fixing seat, and a convex point that cooperates with the annular groove is provided on the peripheral side of the snap fastener.

[0010] Preferably, the buffer output module includes a plurality of connection ends arranged on the same side as the magnetic sheet, the number of the connection ends is the same as the number of the elastic metal contacts, and the connection ends are used in conjunction with the elastic metal contacts.

[0011] Preferably, the ends of the multiple connection ends are provided with the same integrated output end, and the outside of the integrated output end is semi-enclosed and provided with a buffer airbag, which penetrates one side of the protective socket assembly and is used for buffering protection of the wearer's head.

[0012] Preferably, the elastic metal contact includes a fixed tube arranged on the signal connector, an elastic ring is arranged in the fixed tube, the elastic ring is a conical spring, and the end of the elastic ring is provided with a pin that slides with the fixed tube for buffering and fitting the elastic metal contact with the connection end.

[0013] Preferably, one end of the head-mounted body is fixed to the elastic webbing, and the other end of the head-mounted body is provided with an adjustment ring for the elastic webbing to pass through. The elastic webbing passes through the Japanese-shaped buckle and the adjustment ring in sequence and is connected to the middle part of the Japanese-shaped buckle for adjusting the size of the head-mounted device.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting a buckle on the headgear and using an adjustable elastic webbing length, users with different head circumferences can adjust the tightness of the headgear according to their own needs, making it easier for the wearer to wear it comfortably and improving the applicability of the device. Next, the buffer output module on the protective socket assembly can provide elastic protection between the headgear and the wearer's head. The use of an elastic material socket connector can reduce its hardness, reduce the pressure exerted by the socket on the wearer's head, and reduce the discomfort caused by using the headgear.

[0015] 2. In the present invention, by setting a magnetic sheet on the protective socket assembly and a magnetic sheet on the magnetic connector, the socket and connector on the head-mounted device are conveniently connected and disassembled by magnetic attraction. On the one hand, stable collection of electrical signal transmission is achieved, and on the other hand, it is convenient for the wearer to operate with one hand or blindly, and can be quickly put on and taken off.

[0016] 3. In the present invention, the sponge layer and the EVA layer are arranged inside the head-mounted body from the inside to the outside, and the elastic lining and the elastic fabric are covered on the outside of the head-mounted body from the inside to the outside, so as to supplement the softness and elasticity of the inside and outside of the head-mounted device, thereby increasing the applicability and comfort; then, the forehead gasket and the four-button arrangement are used on the forehead electrode sheet, so as to facilitate the head-mounted device to stably collect forehead electrical signals, protect the wearer's forehead, increase the detachability of the electrode sheet, and facilitate replacement and maintenance; the behind-the-ear electrode sheets are extended outward at both ends of the head-mounted device, thereby increasing its flexibility of use, and can be more accurately fixed at the corresponding position for detection, thereby increasing detection accuracy, providing the wearer with a comfortable wearing experience, and increasing durability and aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded view of the structure of the present invention; Figure 3 This is an exploded view of the partial structure of the headband body and forehead pad in the present invention; Figure 4 for Figure 3 A magnified view of the structure of middle A; Figure 5 It is a partial structural diagram of the protective socket assembly and the magnetic connector in the present invention; Figure 6 A partial structural cross-sectional view of the protective socket assembly of the present invention; Figure 7 This is an exploded view of the structure of the magnetic connector in the present invention; Figure 8 This is an exploded view of the structure of the elastic contact point in the present invention.

[0018] In the picture: 1. Headband body; 2. Sponge layer; 3. EVA layer; 4. Elastic lining; 5. Elastic fabric; 6. Pressure pad; 7. Fixed seat; 8. Ring groove; 9. Snap buckle; 10. Bump; 11. Forehead gasket; 12. Protective socket assembly; 13. Magnetic sheet; 14. Buffer output module; 15. Signal connector; 16. Magnetic sheet; 17. Elastic metal contact; 18. Fixed tube; 19. Elastic ring; 20. Thimble; 21. Elastic webbing; 22. Japanese buckle; 23. Electrode behind the ear; 24. Electrode on the forehead; 25. Connector; 26. Integrated output terminal; 27. Buffer airbag. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] See also Figure 1-8 , the present invention provides a technical solution: A head-mounted device for collecting three-channel EEG signals from the forehead is disclosed. Currently, most head-mounted devices use elastic bands or nylon hook-and-loop fasteners to secure the head-mounted device 1 to the wearer's head, so that the front electrodes 24 and the back electrodes 23 on the head-mounted device fit the wearer's forehead and ears, respectively. The signal connector 15 is then plugged into the socket on the head-mounted device to output the detection signal, thereby enabling EEG signal detection. To facilitate the head-mounted device's adaptation to different wearers and provide increased comfort, a spherical buckle 22 for adjusting the length of the elastic webbing 21 can be movably provided in the middle of the elastic webbing 21. One end of the head-mounted device is secured to the elastic webbing 21, and an adjustment ring for the elastic webbing 21 to pass through is provided at the other end of the head-mounted device. After the elastic webbing 21 passes through the adjustment ring, the length is adjusted and secured by the spherical buckle 22. The overlapping elastic webbing 21 can be adjusted to adjust the size of the headband according to the wearer's position, allowing the wearer to adjust the tightness to the desired level. A protective socket assembly 12 is then installed on the headband body 1 to output the electrical signals detected by the headband body 1. This structure can be made of PA9T (a polyamide engineering plastic), which can withstand repeated friction, has good sliding resistance, and is wear-resistant, making it suitable for long-term plug-in and unplug use.

[0021] The signal connector 15 is connected to the protective socket assembly 12 by magnetic attraction. The protective socket assembly 12 includes a magnetic sheet 13 for outputting electrical signals and a buffer output module 14 for reducing pressure on the protective socket assembly 12, thereby alleviating the wearing pressure of the head-mounted device. An elastic output module and a magnetic sheet 16 for receiving electrical signals are used on the signal connector 15. The elastic output module includes a plurality of elastic metal contacts 17 distributed at equal intervals. When the signal connector 15 is close to the protective socket assembly 12, the magnetic sheet 13 and the magnetic sheet 16 utilize the attraction between opposite magnetic poles to achieve quick connection and disassembly, thereby improving ease of use and facilitating single-handed or blind connection operation by the wearer. Among them, such as Figure 5 As shown, it is worth noting that the number of magnetic sheets 13 and magnetic sheets 16 is the same, the magnetic sheets 13 are evenly located on both sides of the protective socket assembly 12, and the magnetic sheets 16 are located on both sides of the signal connector 15. When the protective socket assembly 12 and the signal connector 15 are connected, the magnetic sheets 13 and the magnetic sheets 16 are relatively distributed, and are magnetically attached to each other, thereby realizing the magnetic connection between the protective socket assembly 12 and the signal connector 15.

[0022] At the same time, if Figure 3 As shown, in order to make the headband main body more comfortable to wear, a sponge layer 2, an EVA layer 3, an elastic lining 4 and an elastic fabric 5 can be set in the headband main body 1, wherein the sponge layer 2 and the EVA layer 3 are arranged inside the headband main body 1 from the inside to the outside to disperse the wearing pressure and provide a comfortable wearing experience. The elastic lining 4 and the elastic fabric 5 cover the outside of the headband main body 1 from the inside to the outside to increase durability and aesthetics, supplement the softness and elasticity of the inside and outside of the headband device, and increase applicability and comfort.

[0023] Then, if Figure 2As shown, the ear-behind electrode pieces 23 are arranged at both ends of the head-mounted body 1 in an outwardly extending manner. The ear-behind electrode pieces 23 are connected to the internal circuit of the head-mounted body 1 through flexible signal lines, and the signals of the forehead electrode pieces 24 are transmitted to the integrated output end 26 together, thereby increasing the flexibility of the ear-behind electrode pieces 23 and allowing them to be fitted behind the ear for detection. Three pressing pads 6 are embedded on the inner side of the front end of the head-mounted body 1. The pressing pads 6 can be made of rubber material, and then a fixing seat 7 is provided in the middle of the outer portion of the pressing pad 6. The outer portion of the fixing seat 7 is clamped with a snap button 9, which is clamped through the fixing seat 7. The three four The exterior of the buckle 9 is provided with a common forehead gasket 11. When the buckle 9 and the fixing seat 7 are inserted through the buckle, the forehead gasket 11 is in contact with the inner side of the head-mounted body 1. The forehead gasket 11 can be covered with elastic materials such as non-woven fabrics and sponge pads to cover the fixing seat 7. The buckle 9 and the fixing seat 7 do not directly contact or apply pressure to the wearer's head, and the forehead gasket 11 is reduced in size, not affecting wearability. The forehead gasket 11 is provided with forehead electrode pads 24 connected to the buckle 9. The three forehead electrode pads 24 correspond to the three electrode points on the human forehead on the existing head-mounted device, namely FP2, FP1, and FPz. The buckle 9 and the fixing seat 7 are both made of conductive materials. The forehead electrode pads 24 are in contact with the wearer's forehead. The detected signal is transmitted to the head-mounted body 1 through the buckle 9 and the fixing seat 7, realizing the transmission of electrical signals, protecting the forehead from compression, and adding a detachable structure of the electrode pads and the device for easy maintenance.

[0024] Furthermore, as shown in FIG4 , in some embodiments, an annular groove 8 may be provided on the inner side of the fixing seat 7 , and a convex point 10 cooperating with the annular groove 8 may be provided on the peripheral side of the snap button 9 . When the convex point 10 is engaged with the fixing seat 7 , the position of the snap button 9 may be stably fixed, thereby increasing the stability of the forehead gasket 11 during use.

[0025] In some embodiments, Figure 5 and 6 As shown, the buffer output module 14 includes a plurality of connection ends 25 arranged on the same side as the magnetic sheet 13. The number of the connection ends 25 is the same as the number of the elastic metal contacts 17, and the connection ends 25 can be set to a concave structure. When the elastic metal contact 17 is magnetically attached to the connection end 25, it can slide into the groove, thereby limiting the position of the elastic metal contact 17 and increasing the connection stability between the connector and the socket.

[0026] Next, the same integrated output terminal 26 can be set at the end of multiple connection terminals 25. The integrated output terminal 26 uses circuit output technology and socket signal transmission technology in existing head-mounted devices to simultaneously output the detection electrical signals on the forehead electrode sheet 24 and the behind-the-ear electrode sheet 23 on the head-mounted device to the signal connector 15. The outside of the integrated output terminal 26 is semi-enclosed and provided with a buffer airbag 27. The buffer airbag 27 is fixedly connected to one side of the shell of the protective socket assembly 12, and buffers pressure through elastic deformation. A through hole can be opened on the outside of the buffer airbag 27 to provide favorable conditions for elastic buffering and recovery of the buffer airbag 27. The shape change of the buffer airbag 27 is used to weaken the pressure applied to the wearer of the socket box, avoid high pressure on the structure, and provide buffering protection for the wearer's head.

[0027] Secondly, if Figure 7 and 8 As shown, in some embodiments, the elastic metal contact 17 is composed of a fixing tube 18, a conical spring 19, and a pin 20. The spring provides axial elasticity, ensuring reliable contact between the pin and the connector 25. The elastic ring 19 uses a conical spring to transmit electrical signals to the signal connector 15, completing the head-mounted device's detection of three-lead EEG signals from the forehead. Furthermore, the elasticity of the elastic ring 19 does not affect the adsorption of the magnetic sheet 13 and the magnetic sheet 16. It provides a cushioned fit between the elastic metal contact 17 and the connector 25, effectively resolving the problem of uneven contact surface between the connectors and increasing the connection security and stability between the connector and the socket.

[0028] Working principle: Step 1, wearing stage: snap the snap 9 on the forehead gasket 11 into the fixing seat 7 to fix it, then adjust the Japanese buckle 22 to adjust the head-mounted device to the appropriate size for wearing. When wearing, place the forehead electrode piece 24 on the wearer's forehead, flexibly attach the ear electrode piece 23 to the corresponding position through the flexible signal line, use one side of the magnetic piece 13 on the signal connector 15 close to the buffer output module 14, and the magnetic piece 13 is magnetically connected to the magnetic piece 16 on its outside to limit the position of the signal connector 15, completing the wearing of the head-mounted device. The buffer airbag 27 reduces the pressure on the protective socket assembly 12. The sponge layer 2, EVA layer 3, elastic lining 4 and elastic fabric 5 on the head-mounted body 1 increase the overall comfort of the device, and the snap increases the detachability and maintenance convenience of the forehead electrode piece 24.

[0029] Step 2, signal acquisition stage: the forehead electrode 24 and the behind-the-ear electrode 23 simultaneously capture EEG signals. The forehead signal is transmitted to the internal circuit through a fixing device, and the behind-the-ear signal is transmitted to the internal circuit through a flexible signal line. After the integrated output terminal 26 aggregates the signals, the corresponding elastic metal contact 17 on the signal connector 15 is used to contact the connection terminal 25 to transmit the signals to the external device.

[0030] The basic principles, main features, and advantages of the present invention are shown and described above. The present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A head-mounted device for collecting three-lead EEG signals from the forehead, comprising a head-mounted body (1), an elastic webbing (21) and a signal connector (15), wherein the same elastic webbing (21) is provided at both ends of the head-mounted body (1), and a Japanese-style buckle (22) for adjusting the length of the elastic webbing (21) is movably provided in the middle of the elastic webbing (21), and characterized in that: The head-mounted body (1) is provided with a protective socket assembly (12) for outputting electrical signals, and the signal connector (15) is magnetically connected to the protective socket assembly (12); The protective socket assembly (12) comprises a magnetic sheet (13) for outputting electrical signals and a pressure-reducing buffer output module (14), which is used to reduce the wearing pressure of the head-mounted device; The signal connector (15) comprises an elastic output module for receiving electrical signals and a magnetic sheet (16), wherein the elastic output module comprises a plurality of elastic metal contacts (17) distributed at equal intervals.

2. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 1, characterized in that: The number of the magnetic sheets (13) and the number of the magnetic sheets (16) are the same, and the magnetic sheets (13) and the magnetic sheets (16) are relatively distributed, and are used to protect the magnetic connection between the socket assembly (12) and the signal connector (15).

3. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 1, characterized in that: The head-mounted body (1) comprises a sponge layer (2), an EVA layer (3), an elastic lining (4) and an elastic fabric (5); the sponge layer (2) and the EVA layer (3) are arranged inside the head-mounted body (1) from the inside to the outside, and the elastic lining (4) and the elastic fabric (5) cover the outside of the head-mounted body (1) from the inside to the outside, thereby increasing the overall comfort of the head-mounted body (1).

4. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 1, characterized in that: Both ends of the head-mounted body (1) are provided with ear-back electrodes (23) extending outwards, three pressing pads (6) are embedded in the inner side of the front end of the head-mounted body (1), a fixing seat (7) is provided in the middle of the outer side of the pressing pad (6), a four-button (9) is clamped on the outer side of the fixing seat (7), and the same forehead pad (11) is provided on the outer side of the three four-buttons (9), and the forehead pad (11) is fitted with the inner side of the head-mounted body (1), and a forehead electrode (24) connected to the four-button (9) is provided on the forehead pad (11) for forehead compression protection.

5. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 4, characterized in that: An annular groove (8) is provided on the inner side of the fixing seat (7), and a convex point (10) that cooperates with the annular groove (8) is provided on the peripheral side of the snap button (9).

6. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 1, characterized in that: The buffer output module (14) includes a plurality of connection ends (25) arranged on the same side as the magnetic sheet (13), the number of the connection ends (25) is the same as the number of the elastic metal contacts (17), and the connection ends (25) are used in conjunction with the elastic metal contacts (17).

7. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 6, characterized in that: The ends of the plurality of connection ends (25) are provided with a common integrated output end (26), and the outside of the integrated output end (26) is semi-enclosed and provided with a cushioning airbag (27), which penetrates one side of the protective socket assembly (12) and is used for cushioning and protecting the head of the wearer.

8. The head-mounted device for collecting three-channel EEG signals from the forehead according to claim 1, characterized in that: The elastic metal contact (17) includes a fixed tube (18) arranged on the signal connector (15), an elastic ring (19) is arranged in the fixed tube (18), and the elastic ring (19) is a conical spring. The end of the elastic ring (19) is provided with a pin (20) that is slidably mounted on the fixed tube (18) and is used for buffering and fitting the elastic metal contact (17) with the connection end (25).

9. A head-mounted device for collecting three-channel EEG signals from the forehead according to any one of claims 1 to 8, characterized in that: One end of the head-mounted body (1) is fixed to the elastic webbing (21), and the other end of the head-mounted body (1) is provided with an adjustment ring for the elastic webbing (21) to pass through. The elastic webbing (21) passes through the Japanese-style buckle (22) and the adjustment ring in sequence and is connected to the middle part of the Japanese-style buckle (22) for adjusting the size of the head-mounted device.

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