阅读说明：本技术 一种麻醉深度检测仪的新型脑电信号采集装置 (Novel electroencephalogram signal acquisition device of anesthesia depth detector ) 是由 杨鑫 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种麻醉深度检测仪的新型脑电信号采集装置,属于医疗设备技术领域,包括：信号采集盒；两个采集板,两个所述采集板分别设置于信号采集盒的两侧,两个采集板均通过活动轴与信号采集盒活动连接；信号采集组件,包括电路板、控制模块和三个电极片,信号采集盒的内壁固定连接有螺孔柱,本发明通过转动转盘带动收卷轮转动,从而达到收放卷两个拉绳的目的,两个拉绳被收卷时,带动两个第一弹性松紧带被收紧,从而缩小适配的头围,两个拉绳被放卷时,两个第一弹性松紧带佩戴的范围更大,从而增大适配的头围,利用棘爪与棘轮的自锁功能,使得两个第一弹性松紧带收紧后不会松动,保证佩戴后不会掉落,提高使用效果。(The invention discloses a novel electroencephalogram signal acquisition device of an anesthesia depth detector, which belongs to the technical field of medical equipment and comprises: a signal acquisition box; the two acquisition plates are respectively arranged on two sides of the signal acquisition box, and are movably connected with the signal acquisition box through movable shafts; the signal acquisition assembly comprises a circuit board, a control module and three electrode plates, wherein a threaded hole column is fixedly connected to the inner wall of the signal acquisition box, the rotating disc is rotated to drive the rolling wheel to rotate, so that the purpose of rolling and unrolling the two pull ropes is achieved, when the two pull ropes are rolled, the two first elastic bands are driven to be tightened, so that the head circumference of the adaptation is reduced, when the two pull ropes are unrolled, the wearing range of the two first elastic bands is larger, the head circumference of the adaptation is increased, the self-locking function of a pawl and a ratchet wheel is utilized, the two first elastic bands cannot be loosened after being tightened, the situation that the two first elastic bands fall off after being worn is ensured, and the using effect is improved.)

1. The utility model provides a novel brain electrical signal collection system of anesthesia depth detector which characterized in that includes:

a signal acquisition box (1);

the two acquisition plates (4) are respectively arranged on two sides of the signal acquisition box (1), and the two acquisition plates (4) are movably connected with the signal acquisition box (1) through movable shafts (3);

the signal acquisition assembly comprises a circuit board (9), a control module (10) and three electrode plates (18), wherein a threaded hole column (8) is fixedly connected to the inner wall of the signal acquisition box (1), the circuit board (9) is fixedly connected to the threaded hole column (8) through a bolt, the control module (10) is installed on the circuit board (9), the three electrode plates (18) are respectively arranged on the signal acquisition box (1) and the two acquisition plates (4), the three electrode plates (18) are in signal connection with the control module (10), elastic assemblies are respectively arranged on the signal acquisition box (1) and the two acquisition plates (4), and each elastic assembly is connected with the corresponding electrode plate (18);

tighten up box (2), it is provided with second elastic band (25) to tighten up between box (2) and signal acquisition box (1), the both ends difference fixed connection of second elastic band (25) is in signal acquisition box (1) and tighten up the top of box (2), two gather the equal fixedly connected with first elastic band (5) of one end that board (4) kept away from mutually, it tightens up the subassembly, two to tighten up to be provided with on box (2) first elastic band (5) all with tighten up the subassembly and be connected.

2. The novel electroencephalogram signal acquisition device of the anesthesia depth detector according to claim 1, which is characterized in that: the signal acquisition assembly further comprises a data analysis module (11) and a wireless module (12), wherein the data analysis module (11) and the wireless module (12) are both installed on the circuit board (9), the control module (10) is in signal connection with the data analysis module (11), and the data analysis module (11) is in signal connection with the wireless module (12).

3. The novel electroencephalogram signal acquisition device of the anesthesia depth detector as claimed in claim 2, which is characterized in that: the signal acquisition assembly further comprises a storage battery (7), a battery jar (6) is arranged in the signal acquisition box (1), the storage battery (7) is installed in the battery jar (6), and the circuit board (9) is electrically connected with the storage battery (7).

4. The novel electroencephalogram signal acquisition device of the anesthesia depth detector, according to claim 3, is characterized in that: the signal acquisition assembly further comprises an electric quantity prompting lamp (13), a signal acquisition lamp (14) and a control button (35), the side portion of the signal acquisition box (1) is detachably connected with a sealing cover (101), the electric quantity prompting lamp (13), the signal acquisition lamp (14) and the control button (35) are arranged on the side portion of the sealing cover (101), and the electric quantity prompting lamp (13), the signal acquisition lamp (14) and the control button (35) are all in signal connection with the control module (10).

5. The novel electroencephalogram signal acquisition device of the anesthesia depth detector, according to claim 4, is characterized in that: the bottom of signal acquisition box (1) is provided with the module of charging (36), the module of charging (36) and battery (7) electric connection, the bottom of signal acquisition box (1) is rotated and is connected with shielding piece (37).

6. The novel electroencephalogram signal acquisition device of the anesthesia depth detector according to claim 5, which is characterized in that: mounting grooves (16) have all been seted up to the inboard of signal acquisition box (1) and two acquisition boards (4), every equal fixedly connected with elastic rubber (19) in mounting groove (16), every second spout (20), three are all seted up to the lateral part of elastic rubber (19) electrode slice (18) sliding connection respectively in three second spout (20).

7. The novel electroencephalogram signal acquisition device of the anesthesia depth detector, as recited in claim 6, is characterized in that: each group of elastic components comprises a sliding block (17) and a wafer (21), one end of the sliding block (17) is fixedly connected to the side portion of the electrode plate (18), the wafer (21) is fixedly connected to the other end of the sliding block (17), a first sliding groove (15) is formed in the inner wall of the mounting groove (16), and the sliding block (17) penetrates through the first sliding groove (15) in a sliding mode.

8. The novel electroencephalogram signal acquisition device of the anesthesia depth detector according to claim 7, which is characterized in that: the equal fixedly connected with sleeve (23) in the inboard of signal acquisition box (1) and the outside of two collection boards (4), every group elastic component still includes disk (21) and telescopic link (22), telescopic link (22) fixed connection is in the opposite side of disk (21), disk (21) sliding connection is in sleeve (23), the circumference surface of telescopic link (22) is located to first spring (24) cover, the other end fixed connection of telescopic link (22) is in the inner wall of sleeve (23).

9. The novel electroencephalogram signal acquisition device of the anesthesia depth detector according to claim 8, which is characterized in that: tighten up the subassembly and include two stay cords (26), wind-up wheel (28) and carousel (29), two stay cords (26) respectively with two first elastic band (5) fixed connection, the side inner wall of tightening up box (2) rotates and is connected with pivot (27), wind-up wheel (28) fixed connection is in the circumferential surface of pivot (27), two the other end of stay cord (26) all twines in the circumferential surface of wind-up wheel (28), carousel (29) rotate the lateral part of connecting tightening up box (2), antiskid groove (34) have been seted up on the circumferential surface of carousel (29), and carousel (29) and pivot (27) fixed connection.

10. The novel electroencephalogram signal acquisition device of the anesthesia depth detector according to claim 9, which is characterized in that: the tightening assembly further comprises a ratchet wheel (30), a pawl (31), a shifting rod (32) and a second spring (33), the ratchet wheel (30) is fixedly connected to the circumferential surface of the rotating shaft (27), the pawl (31) is rotatably connected to the inner wall of the side of the tightening box (2), the pawl (31) is meshed with the ratchet wheel (30), the second spring (33) is fixedly connected between the pawl (31) and the inner wall of the tightening box (2), the shifting rod (32) is rotatably connected to the side of the tightening box (2), and the shifting rod (32) is fixedly connected with the pawl (31).

Technical Field

The invention relates to the technical field of medical equipment, in particular to a novel electroencephalogram signal acquisition device of an anesthesia depth detector.

Background

The anesthesiology becomes a special independent subject in clinical medicine, mainly comprises the research of clinical anesthesiology, emergency resuscitation medicine, intensive care therapy, pain diagnosis and treatment and other related medicine and mechanisms thereof, and is a comprehensive subject for researching anesthesia, analgesia, emergency resuscitation and intensive care medicine. Wherein clinical anesthesia is a major component of modern anesthesiology. The anesthesia is a reversible function inhibition of central nerve and/or peripheral nervous system produced by medicine or other methods, the inhibition is characterized by mainly the loss of sensation, especially pain sensation, to achieve the purpose of painless operation treatment, the monitor of anesthesia depth is used for monitoring the anesthesia depth of the general intoxicated patient in the operation, it is composed of earphone, electrode, signal processing and displaying, the EEG signal is the biological potential related to the reflection of brain nerve activity, formed by the synchronous sum of the potentials after the protrusion of a large number of neurons in the cortex, it is the result of the common activity of a plurality of neurons, the EEG signal collecting device for the anesthesia depth monitor is matched with the anesthesia depth monitor to monitor the anesthesia depth of the operation patient in real time.

The existing electroencephalogram signal acquisition device is not convenient to fix with the head of a patient when being worn, the condition that the electroencephalogram signal is acquired by the anesthesia depth detector cannot be matched conveniently when the electroencephalogram signal acquisition device is used, the use effect is poor, a user is inconveniently brought a little, the practicability is remarkably reduced, and the use requirement of the anesthesia depth detector for acquiring the electroencephalogram signal cannot be met.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a novel electroencephalogram signal acquisition device of an anesthesia depth detector, aiming at solving the problems that the existing electroencephalogram signal acquisition device is inconvenient to fix with the head of a patient when being worn, can fall off when being used, is not beneficial to matching the anesthesia depth detector to acquire electroencephalogram signals, has poor use effect, brings some inconvenience to users, obviously reduces the practicability, and cannot meet the use requirement of the anesthesia depth detector for acquiring the electroencephalogram signals.

In order to solve the problems, the invention adopts the following technical scheme:

a novel electroencephalogram signal acquisition device of an anesthesia depth detector comprises:

a signal acquisition box;

the two acquisition plates are respectively arranged on two sides of the signal acquisition box, and are movably connected with the signal acquisition box through movable shafts;

the signal acquisition assembly comprises a circuit board, a control module and three electrode plates, wherein a threaded hole column is fixedly connected to the inner wall of the signal acquisition box, the circuit board is fixedly connected to the threaded hole column through a bolt, the control module is installed on the circuit board, the three electrode plates are respectively arranged on the signal acquisition box and the two acquisition plates, the three electrode plates are in signal connection with the control module, elastic assemblies are arranged on the signal acquisition box and the two acquisition plates, and each elastic assembly is connected with the corresponding electrode plate;

the signal acquisition box is provided with a signal acquisition board, and the signal acquisition box is provided with a signal acquisition box, tighten up the box, it is provided with second elastic cord to tighten up between box and the signal acquisition box, the both ends of second elastic cord respectively fixed connection in the signal acquisition box with tighten up the top of box, two gather the equal fixedly connected with first elastic cord of one end that the board was kept away from, tighten up and be provided with on the box and tighten up the subassembly, two first elastic cord all with tighten up the subassembly and be connected.

As a preferred scheme of the present invention, the signal acquisition assembly further includes a data analysis module and a wireless module, both the data analysis module and the wireless module are mounted on the circuit board, the control module is in signal connection with the data analysis module, and the data analysis module is in signal connection with the wireless module.

As a preferable scheme of the present invention, the signal acquisition assembly further includes a storage battery, a battery jar is disposed in the signal acquisition box, the storage battery is mounted in the battery jar, and the circuit board is electrically connected to the storage battery.

As a preferred scheme of the invention, the signal acquisition assembly further comprises an electric quantity prompting lamp, a signal acquisition lamp and a control button, the side part of the signal acquisition box is detachably connected with a sealing cover, the electric quantity prompting lamp, the signal acquisition lamp and the control button are all arranged on the side part of the sealing cover, and the electric quantity prompting lamp, the signal acquisition lamp and the control button are all in signal connection with the control module.

As a preferred scheme of the invention, a charging module is arranged at the bottom of the signal acquisition box, the charging module is electrically connected with a storage battery, and a shielding sheet is rotatably connected to the bottom of the signal acquisition box.

As a preferable scheme of the invention, mounting grooves are respectively formed in the inner sides of the signal collecting box and the two collecting plates, an elastic rubber is fixedly connected in each mounting groove, a second sliding groove is formed in the side part of each elastic rubber, and the three electrode plates are respectively connected in the three second sliding grooves in a sliding manner.

As a preferable scheme of the invention, each group of elastic components comprises a sliding block and a wafer, one end of the sliding block is fixedly connected to the side part of the electrode plate, the wafer is fixedly connected to the other end of the sliding block, the inner wall of the mounting groove is provided with a first sliding groove, and the sliding block penetrates through the first sliding groove in a sliding manner.

As a preferable scheme of the invention, sleeves are fixedly connected to the inner side of the signal acquisition box and the outer sides of the two acquisition plates, each group of elastic assemblies further comprises a wafer and a telescopic rod, the telescopic rod is fixedly connected to the other side of the wafer, the wafer is slidably connected in the sleeve, the first spring is sleeved on the circumferential surface of the telescopic rod, and the other end of the telescopic rod is fixedly connected to the inner wall of the sleeve.

As a preferable scheme of the present invention, the tightening assembly includes two pulling ropes, a winding wheel and a rotary table, the two pulling ropes are respectively and fixedly connected to the two first elastic bands, a rotary shaft is rotatably connected to a side inner wall of the tightening box, the winding wheel is fixedly connected to a circumferential surface of the rotary shaft, the other ends of the two pulling ropes are wound around the circumferential surface of the winding wheel, the rotary table is rotatably connected to a side portion of the tightening box, an anti-slip groove is formed in the circumferential surface of the rotary table, and the rotary table is fixedly connected to the rotary shaft.

As a preferred scheme of the present invention, the tightening assembly further includes a ratchet wheel fixedly connected to the circumferential surface of the rotating shaft, a pawl rotatably connected to the inner side wall of the tightening box, the pawl engaged with the ratchet wheel, a shift lever fixedly connected between the pawl and the upper inner wall of the tightening box, and a second spring rotatably connected to the side portion of the tightening box.

Compared with the prior art, the invention has the advantages that:

1. the electrode plates send the collected brain flow data to the control module, the control module sends the brain flow data to the data analysis module, the brain flow data is processed by the data analysis module, finally the brain flow data is sent to the external display equipment through the wireless module, workers observe the brain flow data through the external display equipment, and the three electrode plates are used for simultaneously collecting the brain flow data, so that the accuracy of the brain flow data is guaranteed, and errors are reduced.

2. The contact surfaces of the signal acquisition box and the acquisition plate with a user are cambered surfaces, the inner side of the tightening box is also provided with the cambered surfaces so as to be better attached to the forehead skin of the user, the comfort level is improved, the slide block can be extruded when the electrode plate is contacted with the skin of the user so as to push the wafer to slide in the sleeve, the electrode plate is pushed by the elastic reaction of the first spring, the electrode plate can be better contacted with the skin of the patient, meanwhile, the contact area of the electrode plate and the skin is increased, the test impedance is reduced, and the electrode plate and the forehead skin are ensured to be uniformly stressed, closely contacted and comfortable.

3. According to the invention, the rolling wheel is driven to rotate by rotating the rotary table, so that the purpose of rolling and unrolling the two pull ropes is achieved, when the two pull ropes are rolled, the two first elastic bands are driven to be tightened, so that the adaptive head circumference is reduced, when the two pull ropes are unrolled, the wearing range of the two first elastic bands is larger, so that the adaptive head circumference is increased, the two first elastic bands are prevented from loosening after being tightened by utilizing the self-locking function of the pawl and the ratchet wheel, the two first elastic bands are prevented from falling off after being worn, and the use effect is improved.

Drawings

FIG. 1 is a perspective view of the overall construction of the present invention;

FIG. 2 is a perspective view of the present invention in a bottom view;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 4 is an exploded view of the signal acquisition assembly of the present invention;

FIG. 5 is an exploded view of the signal acquisition box of the present invention;

FIG. 6 is a cross-sectional view of the tightening box of the present invention;

fig. 7 is an exploded view of the tightening assembly of the present invention.

The reference numbers in the figures illustrate:

1. a signal acquisition box; 101. a sealing cover; 2. tightening the box; 3. a movable shaft; 4. collecting a plate; 5. a first elastic band; 6. a battery case; 7. a storage battery; 8. a threaded post; 9. a circuit board; 10. a control module; 11. a data analysis module; 12. a wireless module; 13. an electric quantity prompting lamp; 14. a signal acquisition lamp; 15. a first chute; 16. mounting grooves; 17. a slider; 18. an electrode sheet; 19. an elastic rubber; 20. a second chute; 21. a wafer; 22. a telescopic rod; 23. a sleeve; 24. a first spring; 25. a second elastic band; 26. pulling a rope; 27. a rotating shaft; 28. a winding wheel; 29. a turntable; 30. a ratchet wheel; 31. a pawl; 32. a deflector rod; 33. a second spring; 34. an anti-slip groove; 35. a control button; 36. a charging module; 37. a shielding sheet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "having," "nested/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-7, a novel electroencephalogram signal acquisition device of an anesthesia depth detector comprises:

a signal acquisition box 1;

the two acquisition plates 4 are respectively arranged on two sides of the signal acquisition box 1, and the two acquisition plates 4 are movably connected with the signal acquisition box 1 through movable shafts 3;

the signal acquisition assembly comprises a circuit board 9, a control module 10 and three electrode plates 18, wherein a threaded hole column 8 is fixedly connected to the inner wall of the signal acquisition box 1, the circuit board 9 is fixedly connected to the threaded hole column 8 through bolts, the control module 10 is installed on the circuit board 9, the three electrode plates 18 are respectively arranged on the signal acquisition box 1 and the two acquisition plates 4, the three electrode plates 18 are respectively in signal connection with the control module 10, elastic assemblies are respectively arranged on the signal acquisition box 1 and the two acquisition plates 4, each elastic assembly is connected with the corresponding electrode plate 18, the signal acquisition assembly further comprises a data analysis module 11 and a wireless module 12, the data analysis module 11 and the wireless module 12 are both installed on the circuit board 9, the control module 10 is in signal connection with the data analysis module 11, the data analysis module 11 is in signal connection with the wireless module 12, and the signal acquisition assembly further comprises a storage battery 7, a battery jar 6 is arranged in the signal acquisition box 1, a storage battery 7 is arranged in the battery jar 6, and a circuit board 9 is electrically connected with the storage battery 7.

Tighten up box 2, tighten up and be provided with second elastic cord 25 between box 2 and the signal acquisition box 1, the both ends of second elastic cord 25 are fixed connection respectively in signal acquisition box 1 and tighten up the top of box 2, and the equal fixedly connected with first elastic cord 5 of one end that two collection boards 4 kept away from mutually tightens up the subassembly on tightening up box 2, and two first elastic cords 5 all with tighten up the subassembly and be connected.

In this embodiment, the signal collection box 1 and the tightening box 2 are both cavity structures, the signal collection box 1 is movably connected with the collection plate 4 by the movable shaft 3, so that when the device is worn, the contact surfaces of the signal collection box 1 and the collection plate 4 with a user are arc surfaces, and the inner side of the tightening box 2 is also set to be an arc surface, so as to better fit the forehead skin of the user, improve the comfort level, the electrode plate 18 can press the sliding block 17 when contacting with the skin of the user, thereby pushing the wafer 21 to slide in the sleeve 23, pushing the electrode plate 18 by the elastic reaction of the first spring 24, ensuring that the electrode plate 18 can better contact with the skin of the patient, simultaneously increasing the contact area between the electrode plate 18 and the skin, reducing the test impedance, ensuring that the electrode plate 18 and the forehead skin are stressed evenly, contacted closely and comfortably, the elastic rubber 19 is made of skin-friendly material, and utilizing the electrode plate 18 to slide in the second chute 20 for a short distance, the position of the electrode plate 18 is ensured not to be deviated, the electrode plate 18 sends the collected brain flow data to the control module 10, the control module 10 sends the brain flow data to the data analysis module 11, the brain flow data is processed by the data analysis module 11, finally, the brain flow data is sent to an external display device by the wireless module 12, a worker observes through the external display device, the three electrode plates 18 are used for simultaneously collecting the brain flow data so as to ensure the accuracy of the brain flow data and reduce errors, the two first elastic bands 5 are used for being worn on the top of the head of the user by matching with the second elastic band 25, the rotating disc 29 is used for driving the winding wheel 28 to rotate, the length of the first elastic bands 5 can be adjusted so as to realize the user adapting to different head circumferences, and the self-locking function of the pawl 31 and the ratchet 30 is used for ensuring that the brain flow data cannot fall off after being worn, the use effect is improved.

Specifically, the signal acquisition subassembly still includes electric quantity warning light 13, signal acquisition lamp 14 and control button 35, the lateral part of signal acquisition box 1 can be dismantled and be connected with sealed lid 101, electric quantity warning light 13, signal acquisition lamp 14 and control button 35 all set up in the lateral part of sealed lid 101, and electric quantity warning light 13, signal acquisition lamp 14 and control button 35 all with control module 10 signal connection, the bottom of signal acquisition box 1 is provided with the module 36 that charges, the module 36 and the battery 7 electric connection charge, the bottom of signal acquisition box 1 is rotated and is connected with shielding piece 37.

In this embodiment, the setting of control button 35 for the start-up and the closing of control electrode slice 18 collection function, the setting of electric quantity warning light 13 for the suggestion battery 7 electric quantity surplus, the setting of signal acquisition lamp 14 for whether normal operating is gathered to suggestion electrode slice 18, the setting of module 36 that charges for directly charging for battery 7 from the outside, shelter from piece 37 through rotating and can shelter from module 36 that charges, reach and prevent grey dirt-proof effect.

Specifically, the inner sides of the signal acquisition box 1 and the two acquisition plates 4 are respectively provided with a mounting groove 16, each mounting groove 16 is internally and fixedly connected with elastic rubber 19, the side part of each elastic rubber 19 is provided with a second sliding groove 20, three electrode plates 18 are respectively and slidably connected into the three second sliding grooves 20, each group of elastic components comprises a sliding block 17 and a circular plate 21, one end of the sliding block 17 is fixedly connected with the side part of the electrode plate 18, the circular plate 21 is fixedly connected with the other end of the sliding block 17, the inner wall of the mounting groove 16 is provided with a first sliding groove 15, the sliding block 17 slidably penetrates through the first sliding groove 15, the inner side of the signal acquisition box 1 and the outer sides of the two acquisition plates 4 are respectively and fixedly connected with a sleeve 23, each group of elastic components further comprises a circular plate 21 and a telescopic rod 22, the telescopic rod 22 is fixedly connected with the other side of the circular plate 21, the circular plate 21 is slidably connected into the sleeve 23, and the first spring 24 is sleeved on the circumferential surface of the telescopic rod 22, the other end of the telescopic rod 22 is fixedly connected to the inner wall of the sleeve 23.

In this embodiment, one of the sleeves 23 is fixedly connected to the inner wall of the side of the signal acquisition box 1, the other two sleeves 23 are respectively and fixedly connected to the side portion of the acquisition plate 4, the electrode plate 18 can be pressed against the sliding block 17 when contacting with the skin of a user, so that the wafer 21 is pushed to slide in the sleeve 23, the electrode plate 18 is pushed by the elastic reaction of the first spring 24, the electrode plate 18 can be better contacted with the skin of the patient, meanwhile, the contact area between the electrode plate 18 and the skin is increased, the test impedance is reduced, and the uniform stress between the electrode plate 18 and the forehead skin, close contact and comfort are ensured.

Specifically, the tightening assembly comprises two pulling ropes 26, a winding wheel 28 and a rotating disc 29, the two pulling ropes 26 are respectively and fixedly connected with the two first elastic bands 5, the inner side wall of the tightening box 2 is rotatably connected with a rotating shaft 27, the winding wheel 28 is fixedly connected with the circumferential surface of the rotating shaft 27, the other ends of the two pulling ropes 26 are wound on the circumferential surface of the winding wheel 28, the rotating disc 29 is rotatably connected with the side part of the tightening box 2, the circumferential surface of the rotating disc 29 is provided with an anti-skidding groove 34, the rotating disc 29 is fixedly connected with the rotating shaft 27, the tightening assembly further comprises a ratchet 30, a pawl 31, a shift lever 32 and a second spring 33, the ratchet 30 is fixedly connected with the circumferential surface of the rotating shaft 27, the pawl 31 is rotatably connected with the inner side wall of the tightening box 2, the pawl 31 is meshed with the ratchet 30, the second spring 33 is fixedly connected between the pawl 31 and the upper inner wall of the tightening box 2, the shift lever 32 is rotatably connected with the side part of the tightening box 2, and the shift lever 32 is fixedly connected with the pawl 31.

In this embodiment, the setting of antiskid groove 34, can increase frictional force, it rotates to drive rolling wheel 28 through rotating carousel 29, thereby reach the purpose of receiving and releasing two stay cords 26, when two stay cords 26 were rolled, drive two first elastic bands 5 and be tightened up, thereby reduce the head circumference of adaptation, when two stay cords 26 were unreeled, the scope of wearing of two first elastic bands 5 is bigger, thereby the head circumference of increase adaptation, utilize pawl 31 and ratchet 30's self-locking function, make two first elastic bands 5 can not become flexible after tightening up, guarantee to wear the back and can not drop, and the use effect is improved.

The working principle is as follows: the device is sleeved on the top of the head of a user, a signal acquisition box 1 is positioned on the forehead of the user, so that an electrode plate 18 is in contact with the forehead skin of the user, the electrode plate 18 sends acquired brain flow data to a control module 10, the control module 10 sends the brain flow data to a data analysis module 11, the data analysis module 11 processes brain flow data, finally the brain flow data is sent to an external display device through a wireless module 12, a worker observes the brain flow data through the external display device, the three electrode plates 18 are used for simultaneously acquiring the brain flow data so as to ensure the accuracy of the brain flow data and reduce errors, two first elastic bands 5 are matched with second elastic bands 25 to be worn on the top of the head of the user, and a rotating disc 29 is rotated to drive a winding wheel 28 to rotate, so that the length of the first elastic bands 5 can be adjusted to be matched with users with different head circumferences, by utilizing the self-locking function of the pawl 31 and the ratchet wheel 30, the anti-falling device can not fall off after being worn, and the using effect is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.