CN218889674U

CN218889674U - Electroencephalogram detection device

Info

Publication number: CN218889674U
Application number: CN202222082052.0U
Authority: CN
Inventors: 李建辉
Original assignee: Wuhan Xingjiayuan Technology Co ltd
Current assignee: Wuhan Xingjiayuan Technology Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2023-04-21
Anticipated expiration: 2032-08-09

Abstract

The utility model discloses an electroencephalogram detection device, which comprises: the electroencephalogram cap comprises an electroencephalogram cap body, at least one fixing component and at least one electrode component, wherein the electroencephalogram cap body is provided with at least one fixing hole, the fixing component comprises a flexible piece, a first fixing piece and a second fixing piece, the inside of the flexible piece is hollow, one end of the flexible piece is connected to one side of the electroencephalogram cap body, the other end of the flexible piece is open, a first communication hole communicated with the inside of the flexible piece is formed in the mode that the flexible piece is relatively fixed to the fixing hole, the first fixing piece is connected to the inner wall of the flexible piece and is enclosed with the first fixing piece to form a filling cavity, one end of the second fixing piece is connected to the other side of the electroencephalogram cap body, the other end of the second fixing piece sequentially penetrates through the fixing hole and the first communication hole and is connected to the first fixing piece, the electrode component is used for connecting the flexible piece and the first fixing piece to the electroencephalogram cap body, and the electrode component comprises a powder electrode connected to the first fixing piece and is used for cooperatively collecting and detecting weak electric signals of a human brain. The utility model can solve the problem that the electrode seat is easy to fall off from the electroencephalogram cap.

Description

Electroencephalogram detection device

Technical Field

The utility model relates to the technical field of electroencephalogram signal acquisition, in particular to an electroencephalogram detection device.

Background

The silver/silver chloride electrode has the advantages of high exchange current density, difficult polarization, low impedance, constant electrode potential (smaller DC drift) and the like, can be used for detecting bioelectric signals, and has a silver/silver chloride particle highly dispersed structure, so that the silver/silver chloride powder solid electrode has the advantages of interference resistance, high stability, convenience in processing, no surface abrasion and the like compared with a silver/silver chloride coating electrode.

Silver/silver chloride powder solid electrodes are widely used for measuring bioelectrical weak signals, such as detection of brain electrical signals, etc., as the application number: chinese utility model patent of cn200710052564.X, name: the silver/silver chloride powder solid electrode comprises an electrode material 1 (electrode core) with a measuring surface 5, an insulating layer 4 coated on the surface of the electrode material 1 and a wire 3 electrically connected with the electrode material 1, wherein the measuring surface 5 of the electrode material 1 is exposed outside the insulating layer 4 to form a measuring channel. The electrode can accurately and reliably detect bioelectric signals. The powder electrode is connected to the electroencephalogram cap by the electrode seat of pure silica gel generally so as to relieve uncomfortable feeling caused by contact between the electrode and human skin, wherein the powder electrode is directly placed in a hole on the electroencephalogram cap and is fixed by the elasticity of the cloth of the cap body, after the electroencephalogram cap is used for a period of time, the hole at the fixed position of the cloth is deformed or loses elasticity, and the electrode seat is easy to fall off from the cap body.

Therefore, there is a need for an electroencephalogram detection device, which is used for solving the problem that in the prior art, the electrode base is easy to fall off from the cap body due to the fact that the holes for fixing the electrode connecting base on the electroencephalogram cap are easy to deform after long-term use.

Disclosure of Invention

In view of the foregoing, it is necessary to provide an electroencephalogram detection apparatus, which solves the technical problem that in the prior art, the electrode holder is easy to fall off from the cap body due to the fact that the holes for fixing the electrode holder on the electroencephalogram cap are easy to deform after long-term use.

In order to achieve the technical purpose, the technical scheme of the utility model provides an electroencephalogram detection device, which comprises:

the electroencephalogram cap is provided with at least one fixing hole;

the fixing assembly comprises a flexible piece, a first fixing piece and a second fixing piece, wherein the inside of the flexible piece is hollow, one end of the flexible piece is connected to one side of the electroencephalogram cap, the other end of the flexible piece is open, a first communication hole is formed in the flexible piece relative to the fixing hole, the first communication hole is communicated with the inside of the flexible piece, the first fixing piece is arranged in the flexible piece and is connected to the inner wall of the flexible piece, a filling cavity is formed by encircling the inner wall of the flexible piece and the first fixing piece, one end of the second fixing piece is connected to the other side of the electroencephalogram cap, and the other end of the second fixing piece sequentially penetrates through the fixing hole and the first communication hole and is connected to the first fixing piece, so that the flexible piece and the first fixing piece are connected to the electroencephalogram cap;

at least one electrode assembly, the electrode assembly includes powder electrode, the powder electrode connect in first mounting for the weak electric signal of cooperation collection and detection human brain.

Further, the flexible member is further provided with a second communication hole, the electrode assembly further comprises an electrode wire, one end of the electrode wire is connected to the first fixing member and is electrically connected with the powder electrode, and the other end of the electrode wire penetrates through the second communication hole and is connected to an external signal receiving device in an extending mode.

Further, the first fixing piece is detachably connected with the second fixing piece, so that the flexible piece is abutted to one side of the fixing piece and one side of the electroencephalogram cap, and the fixing piece is abutted to the second fixing piece and the other side of the electroencephalogram cap.

Further, the first mounting includes fixed block, solid fixed ring and at least one connecting block, the fixed block is built-in the flexible piece, gu fixed ring cover is located the fixed block, just gu fixed ring's circumference outer wall connect in the circumference inner wall of flexible piece, the connecting block is followed gu the circumference of fixed block set up in between the outer wall of fixed block and the inner wall of solid fixed ring, and with the outer wall of fixed block and the inner wall homogeneous phase connection of solid fixed ring, the outer wall of fixed block with gu fixed ring's inner wall encloses and closes and to be formed with the holding tank, the powder electrode is cyclic annular, and connect in the inner wall of holding tank.

Further, the fixed block is provided with a threaded hole relative to the first communication hole, the second fixed piece comprises a connecting rod, an external thread is provided on the circumferential outer wall of the connecting rod, and one end of the connecting rod sequentially penetrates through the fixed hole and the first communication hole to be in threaded connection with the fixed block.

Further, the connecting rod is the echelonment to have big footpath section and path section, the big footpath section of connecting rod is kept away from relatively path section the setting of flexible piece, the external screw thread has been seted up to the circumference outer wall of path section of connecting rod, path section of connecting rod pass in proper order fixed orifices and first communication hole threaded connection in the fixed block, just the big footpath section butt of connecting rod in the opposite side of brain electricity cap is in order to restrict flexible piece, fixed block and powder electrode are relative brain electricity cap removes.

Further, the connecting block is provided with a notch, and the electrode wire is arranged along the circumferential direction of the fixed block and embedded in the notch.

Further, the flexible piece is loudspeaker form to have straightway and pitch arc section, the straightway of flexible piece is close to relative pitch arc section the setting of brain electricity cap, place in the fixed ring the straightway of flexible piece, and the butt in the bottom inner wall of filling the chamber, the pitch arc section of flexible piece is along keeping away from the direction opening of brain electricity cap constantly increases, just the inner wall of the pitch arc section of flexible piece with fixed ring, powder electrode and fixed block enclose and close and form fill the chamber.

Further, the connecting rod is provided with a through hole along the axis thereof, and the through hole penetrates through the connecting rod and is communicated with the filling cavity.

Further, the cross section of the through hole is polygonal.

Compared with the prior art, the utility model has the beneficial effects that: the inside cavity of flexible piece, and the one end of flexible piece is connected in one side of brain electricity cap, the other end opening, first mounting is built-in the inside of flexible piece, first mounting encloses with the inner wall of flexible piece and closes and form the filling chamber, be used for holding the conducting resin that realizes powder electrode and human skin electric connection, the fixed orifices has been seted up on the brain electricity cap simultaneously, and the first communication hole has been seted up to flexible piece relatively fixed orifices, the second mounting sets up in the opposite side of brain electricity cap, and the second mounting passes fixed orifices and first communication hole in proper order, and be connected with first mounting, be used for with flexible piece and first mounting fixed connection in brain electricity cap, compare in prior art, the flexible piece passes through the connection of first mounting and second mounting, realize with brain electricity cap's fixed connection, replace the elasticity of leaning on the cap body cloth with the hole on directly placing the powder electrode on brain electricity cap to fix it, not only improved the firm degree that the flexible piece is connected on the brain electricity cap, and reduced the uncomfortable feeling that the subject easily caused at the long-term or measurement is worn in proper order through the flexible piece, and because of the flexible piece is used for the electrode is easily to be worn from the easy deformation of the cap seat is realized because of the electrode is pressed down in the life-span is used for leading to the problem of the easy deformation of the electrode seat to the life of the scalp.

Drawings

FIG. 1 is a schematic view of a three-dimensional structure of a connecting rod, a flexible member, a fixed block, a connecting block and a fixed ring according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a three-dimensional structure of a connecting rod, a flexible member, a fixed block, a connecting block and a fixed ring according to another view angle;

FIG. 3 is a cross-sectional view of an electroencephalogram detection apparatus according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a three-dimensional structure of a connection of a fixing block, a connecting block and a fixing ring according to an embodiment of the present utility model;

fig. 5 is a schematic three-dimensional structure of a flexible member according to an embodiment of the present utility model.

Detailed Description

Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the utility model, and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 3, the present utility model provides an electroencephalogram detection apparatus, including: the electroencephalogram cap 1, at least one fixed component 2 and at least one electrode component 3, at least one fixed hole has been seted up to electroencephalogram cap 1, fixed component 2 includes flexible piece 21, first mounting 22 and second mounting 23, the inside cavity of flexible piece 21, one end of flexible piece 21 is connected in one side of electroencephalogram cap 1, the other end opening, first communication hole 211 has been seted up to flexible piece 21 relative to the fixed hole, first communication hole 211 is linked together with the inside of flexible piece 21, first mounting 22 is built-in flexible piece 21, and connect in the inner wall of flexible piece 21, the inner wall of flexible piece 21 encloses with first mounting 22 and is formed with filling cavity 24, the one end of second mounting 23 is connected in the opposite side of electroencephalogram cap 1, the other end passes fixed hole and first communication hole 211 in proper order, and connect in first mounting 22, be used for connecting flexible piece 21 and first mounting 22 in electroencephalogram cap 1, electrode component 3 includes powder electrode 31, powder electrode 31 is connected in first mounting 22, be used for the cooperation to collect and detect the weak electric signal of human brain.

In this device, the inside cavity of flexible piece 21, and the one end of flexible piece 21 is connected in one side of brain electricity cap 1, the other end opening, first mounting 22 is built-in the inside of flexible piece 21, first mounting 22 encloses with the inner wall of flexible piece 21 and closes and form filling chamber 24 for hold the conductive adhesive that realizes powder electrode 31 and human skin electric connection, the fixed orifices has been seted up on brain electricity cap 1 simultaneously, and flexible piece 21 has seted up first communication hole 211 relative to the fixed orifices, second mounting 23 sets up in the opposite side of brain electricity cap 1, and second mounting 23 passes fixed orifices and first communication hole 211 in proper order, and be connected with first mounting 22, be used for with flexible piece 21 and first mounting 22 fixed connection in brain electricity cap 1.

It can be appreciated that, compared with the prior art, the flexible member 21 is connected with the second fixing member 23 through the first fixing member 22, so as to realize the fixed connection with the electroencephalogram cap 1, and replace the manner of fixing the powder electrode 31 in the hole on the electroencephalogram cap by the elasticity of the cap cloth, so that the firmness of connecting the flexible member 21 to the electroencephalogram cap 1 is improved, the discomfort of a subject wearing or measuring for a long time is reduced through the flexible member 21, and the scalp is prevented from being damaged by the pure plastic member easily due to the compression, and the technical problem that the electrode holder is easy to fall off from the cap body due to the deformation of the hole for fixing the electrode connecting holder on the electroencephalogram cap due to long-term use can be solved.

Further, the flexible member 21 in the device is made of silica gel, so as to reduce discomfort caused to the head.

Further, in the device, one side of the electroencephalogram cap 1 is the side where the electroencephalogram cap 1 contacts with the scalp of a person, the other side of the electroencephalogram cap 1 is the side where the electroencephalogram cap 1 is far away from the scalp of a person, meanwhile, in the device, the electroencephalogram cap 1 is provided with a plurality of fixing holes according to the international 10-20 system positioning standard, the flexible piece 21 and the powder electrode 31 are respectively arranged corresponding to the fixing holes, and the international 10-20 system positioning standard is a conventional setting known to a person skilled in the art and is not excessively described herein.

As shown in fig. 1, 3 and 5, the flexible member 21 is further provided with a second communication hole 212, the electrode assembly 3 further includes an electrode wire 32, one end of the electrode wire 32 is connected to the first fixing member 22 and electrically connected to the powder electrode 31, and the other end of the electrode wire 32 passes through the second communication hole 212 and is connected to an external signal receiving device in an extending manner.

It can be understood that, in order to avoid accidentally dragging the electrode wire 32 during use, the electrode wire 32 drives the first fixing member 22 connected with the powder electrode 31 to move, and the first fixing member 21 is separated or loosened from the first communicating hole 211, the flexible member 21 is further provided with a second communicating hole 212, the electrode wire 32 is connected to the first fixing member 22 through the second communicating hole 212 in an extending manner, and two ends of the electrode wire 32 are respectively electrically connected with the powder electrode 31 and an external signal receiving device.

As shown in fig. 3, the first fixing member 22 is detachably connected with the second fixing member 23, so that the flexible member 21 abuts against one side of the fixing member and the electroencephalogram cap 1, and the fixing member abuts against the second fixing member 23 and abuts against the other side of the electroencephalogram cap 1.

It can be understood that the first fixing member 22 and the second fixing member 23 in the device are detachably connected, so that the first fixing member 22 sequentially abuts against one side of the flexible member 21 and one side of the electroencephalogram cap 1, and the second fixing member 23 abuts against the other side of the electroencephalogram cap 1, thereby fixing the flexible member 21 and the first fixing member 22 on the electroencephalogram cap 1.

As shown in fig. 2 and 4, the first fixing member 22 includes a fixing block 221, a fixing ring 222, and at least one connecting block 223, the fixing block 221 is disposed in the flexible member 21, the fixing ring 222 is sleeved on the fixing block 221, a circumferential outer wall of the fixing ring 222 is connected to a circumferential inner wall of the flexible member 21, the connecting block 223 is disposed between an outer wall of the fixing block 221 and an inner wall of the fixing ring 222 along a circumferential direction of the fixing block 221 and is connected to both the outer wall of the fixing block 221 and the inner wall of the fixing ring 222, a containing groove is formed by surrounding the outer wall of the fixing block 221 and the inner wall of the fixing ring 222, and the powder electrode 31 is annular and is connected to the inner wall of the containing groove.

It will be appreciated that the first fixing member 22 is formed as a unit of a fixing block 221, at least one connection block 223, and a fixing ring 222, and is formed with a receiving groove for fixing and mounting the powder electrode 31, thereby connecting the powder electrode 31 to the fixing block 221 to form the fixing of the powder electrode 31 to the electroencephalogram cap 1.

Further, the powder electrode 31 in the present device is formed by molding and sintering silver/silver chloride powder into a ring-shaped solid, and then placing the solid in a receiving tank for further fixation, which will not be described herein.

As an embodiment, as shown in fig. 4, in order to facilitate routing of the electrode wire 32, the electrode wire 32 is arranged around the circumference of the fixed block 221, and to improve the connection strength between the electrode wire 32 and the powder electrode 31, the connection block 223 is provided with a notch 2231, and the electrode wire 32 is arranged along the circumference of the fixed block 221 and is embedded in the notch 2231.

Further, specifically, the number of the connection blocks 223 in the present device is three.

Wherein as an embodiment, the fixing block 221 is provided with a threaded hole opposite to the first communication hole 211, the second fixing member 23 includes a connecting rod 231, an external thread is provided on a circumferential outer wall of the connecting rod 231, and one end of the connecting rod 231 sequentially passes through the fixing hole and the first communication hole 211 to be in threaded connection with the fixing block 221.

It will be appreciated that the first fixing member 22 and the second fixing member 23 in the present device are detachably connected by means of screw connection.

Further, the connecting rod 231 and the fixing block 221 may be detachably connected through a clamping connection, for example, at least one elastic clamping block is connected to an outer axis wall of one end of the connecting rod 231, the fixing block 221 is provided with a through hole, at least one clamping groove is formed in a circumferential inner wall of the through hole, the connecting rod 231 is inserted into the through hole, and the elastic clamping block is clamped in the clamping groove in a matched manner, so that the connecting rod 231 is limited to move along an axis of the through hole, and the detachable connection between the fixing block 221 and the connecting rod 231 may be also realized.

As an embodiment, as shown in fig. 3, the connecting rod 231 is in a step shape and has a large-diameter section and a small-diameter section, the large-diameter section of the connecting rod 231 is relatively small-diameter section far away from the flexible member 21, an external thread is provided on the circumferential outer wall of the small-diameter section of the connecting rod 231, the small-diameter section of the connecting rod 231 sequentially passes through the fixing hole and the first communication hole 211 to be in threaded connection with the fixing block 221, and the large-diameter section of the connecting rod 231 is abutted against the other side of the electroencephalogram cap 1 so as to limit the movement of the flexible member 21, the fixing block 221 and the powder electrode 31 relative to the electroencephalogram cap 1.

It can be understood that the small-diameter section of the connecting rod 231 sequentially passes through the fixing hole and the first communication hole 211, so that the bottom inner wall of the flexible member 21 and the electroencephalogram cap 1 are respectively arranged between the fixing block 221 and the large-diameter section of the connecting rod 231, and are sequentially abutted, and the fixing and the dismounting of the fixing block 221, the flexible member 21, the electroencephalogram cap 1 and the large-diameter section of the connecting rod 231 are realized by screwing the small-diameter section of the connecting rod 231 into the screw depth of the fixing block 221.

In a preferred embodiment, the connecting rod 231 has a through hole 232 along its axis, and the through hole 232 penetrates the connecting rod 231 and communicates with the filling cavity 24.

It will be appreciated that the through-hole 232 penetrates the connecting rod 231 and communicates with the filling cavity 24, so as to facilitate the user to fill the filling cavity 24 with the conductive paste through the through-hole 232, which will not be described herein.

Further, the cross section of the through hole 232 is polygonal.

It will be appreciated that in order to facilitate the user's installation and removal of the threaded connection between the connecting rod 231 and the fixing block 221, the user may insert a screwdriver provided in cooperation with the through-hole 232 into the through-hole 232 to remove the connecting rod 231 from the fixing block 221 or install it on the fixing block 221.

Specifically, as shown in fig. 1, the cross section of the through hole 232 in the present device is regular hexagon.

As shown in fig. 1 and 3, the flexible member 21 is horn-shaped and has a straight line segment and an arc line segment, the straight line segment of the flexible member 21 is arranged close to the electroencephalogram cap 1 relative to the arc line segment, the fixing ring 222 is arranged in the straight line segment of the flexible member 21 and is abutted to the inner wall of the bottom of the filling cavity 24, the arc line segment of the flexible member 21 is opened in a direction away from the electroencephalogram cap 1 and is continuously enlarged, and the inner wall of the arc line segment of the flexible member 21 is enclosed with the fixing ring 222, the powder electrode 31 and the fixing block 221 to form the filling cavity 24.

It will be appreciated that the flexible member 21 is horn-shaped, and when the arcuate section of the flexible member 21 abuts against the skin of the patient, it can better engage with the scalp of the patient, thereby reducing the discomfort of the patient caused by the device.

According to the specific working process, the inside of the flexible part 21 is hollow, one end of the flexible part 21 is connected to one side of the electroencephalogram cap 1, the other end of the flexible part 21 is open, the first fixing part 22 is arranged in the flexible part 21, the first fixing part 22 is enclosed with the inner wall of the flexible part 21 to form the filling cavity 24 for containing conductive adhesive for realizing the electric connection between the powder electrode 31 and human skin, meanwhile, the electroencephalogram cap 1 is provided with a fixing hole, the flexible part 21 is provided with a first communication hole 211 relative to the fixing hole, the second fixing part 23 is arranged on the other side of the electroencephalogram cap 1, the second fixing part 23 sequentially penetrates through the fixing hole and the first communication hole 211 and is connected with the first fixing part 22, and is used for fixedly connecting the flexible part 21 and the first fixing part 22 with the electroencephalogram cap 1.

The user firstly makes the silver/silver chloride powder into a shape, is fixedly connected to a fixed structure formed by the fixed ring 222, the fixed block 221 and the connecting block 223, and places the electrode wire 32 on the notch 2231 of the connecting block 223 so as to facilitate wiring of the electrode wire 32, then places the electrode structure formed by the silver/silver chloride powder, the fixed ring 222, the fixed block 221 and the connecting block 223 in the filling cavity 24, passes through the other end of the electrode wire 32 from the first through hole 213, then sequentially passes through the mounting hole and the through hole 232 to be connected with the fixed block 221 in a threaded manner, so that the electroencephalogram cap 11 is abutted against the flexible piece 21 and the large-diameter section of the connecting rod 231, and finally forms electric connection with the other end of the electrode wire 32 and the detection equipment.

Through the structure, the technical problem that the electrode seat is easy to fall off from the cap body due to the fact that the holes for fixing the electrode connection seat on the electroencephalogram cap in the prior art are easy to deform after long-term use can be solved.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. An electroencephalogram detection apparatus, comprising:

the electroencephalogram cap is provided with at least one fixing hole;

2. The electroencephalogram detection apparatus according to claim 1, wherein the flexible member is further provided with a second communication hole, the electrode assembly further comprises an electrode wire, one end of the electrode wire is connected to the first fixing member and is electrically connected to the powder electrode, and the other end of the electrode wire passes through the second communication hole and is connected to an external signal receiving device in an extending manner.

3. The electroencephalogram detection apparatus according to claim 2, wherein the first fixing member is detachably connected with the second fixing member such that the flexible member abuts against one side of the fixing member and the electroencephalogram cap, and the fixing member abuts against the second fixing member and abuts against the other side of the electroencephalogram cap.

4. The electroencephalogram detection apparatus according to claim 3, wherein the first fixing member comprises a fixing block, a fixing ring and at least one connecting block, the fixing block is internally arranged in the flexible member, the fixing ring is sleeved on the fixing block, the circumferential outer wall of the fixing ring is connected to the circumferential inner wall of the flexible member, the connecting block is circumferentially arranged between the outer wall of the fixing block and the inner wall of the fixing ring along the circumference of the fixing block and is connected with the outer wall of the fixing block and the inner wall of the fixing ring, a containing groove is formed by encircling the outer wall of the fixing block and the inner wall of the fixing ring, and the powder electrode is annular and is connected to the inner wall of the containing groove.

5. The electroencephalogram detection apparatus according to claim 4, wherein the fixing block is provided with a threaded hole relative to the first communication hole, the second fixing member comprises a connecting rod, an external thread is provided on a circumferential outer wall of the connecting rod, and one end of the connecting rod sequentially penetrates through the fixing hole and the first communication hole to be in threaded connection with the fixing block.

6. The electroencephalogram detection apparatus according to claim 5, wherein the connecting rod is stepped and has a large-diameter section and a small-diameter section, the large-diameter section of the connecting rod is arranged away from the flexible member relative to the small-diameter section, an external thread is provided on a circumferential outer wall of the small-diameter section of the connecting rod, the small-diameter section of the connecting rod sequentially passes through the fixing hole and the first communication hole to be connected with the fixing block in a threaded manner, and the large-diameter section of the connecting rod abuts against the other side of the electroencephalogram cap to limit movement of the flexible member, the fixing block and the powder electrode relative to the electroencephalogram cap.

7. The electroencephalogram detection apparatus according to claim 4, wherein the connection block is provided with a notch, and the electrode wire is arranged along the circumferential direction of the fixing block and is embedded in the notch.

8. The electroencephalogram detection device according to claim 4, wherein the flexible piece is horn-shaped and is provided with a straight line section and an arc line section, the straight line section of the flexible piece is arranged close to the electroencephalogram cap relative to the arc line section, the fixing ring is internally arranged in the straight line section of the flexible piece and is abutted to the inner wall of the bottom of the filling cavity, the arc line section of the flexible piece is opened in a direction away from the electroencephalogram cap and is continuously enlarged, and the inner wall of the arc line section of the flexible piece is enclosed with the fixing ring, the powder electrode and the fixing block to form the filling cavity.

9. The electroencephalogram detection apparatus according to claim 5, wherein the connecting rod is provided with a through hole along an axis thereof, the through hole penetrating the connecting rod and communicating with the filling cavity.

10. The electroencephalogram detection apparatus according to claim 9, wherein the cross section of the through hole is polygonal.