WO2022004408A1

WO2022004408A1 - Brainwave measurement device

Info

Publication number: WO2022004408A1
Application number: PCT/JP2021/023017
Authority: WO
Inventors: 雄眞北添; 慈厚尾野
Original assignee: 住友ベークライト株式会社
Priority date: 2020-07-02
Filing date: 2021-06-17
Publication date: 2022-01-06

Abstract

A brainwave measurement device (10) that has a fixing frame (20), a brainwave electrode unit (80) that has an electrode protrusion (83) (an electrode part) for detecting brainwaves and is attached to the fixing frame (20), and an adjustment mechanism that makes it possible to adjust the attachment direction of the brainwave electrode unit (80). The adjustment mechanism is, for example, a biaxial rocking mechanism.

Description

EEG measuring device

The present invention relates to an electroencephalogram measuring device.

Various developments have been made regarding electrodes for EEG detection. As this kind of technique, for example, the technique described in Patent Document 1 is known. The brain wave measurement electrode (brain wave electrode holder) disclosed in Patent Document 1 includes a main body portion arranged around the head, a plurality of support portions attached to the main body portion, and at least a part of the support portions. A brain wave electrode holder provided on the tip side and supported inside the main body portion, wherein the main body portion has a size that allows fingers to be inserted and touched with the brain wave electrode. The brain wave electrode has an opening, and the base end side is supported by the support portion, and the flexible portion is flexible and elastically deformed, and the flexible portion is provided on the tip end side of the flexible portion and is provided on the head surface. The flexible portion has an electrode portion to be brought into contact with the flexible portion, and the flexible portion can be deformed until the electrode portion is moved in a direction away from the axis of the support portion. The contact pressure of the flexible portion is applied, and the flexible portion also applies the contact pressure with the head surface to the electrode portion moved in a substantially parallel direction along the head surface.

Japanese Unexamined Patent Publication No. 2018-94054

In general, since the electrodes and the headset are fixed in the electroencephalogram measuring device, there is a problem that other electrodes move when each electrode is adjusted, and an improved technology is required. The technique disclosed in Patent Document 1 is also the same, and the pressure can be adjusted by moving it in the direction perpendicular to the scalp, but there is no adjustment function in the front-back and left-right directions, and if an electrode is adjusted as described above, The electrode, which originally does not need to be adjusted in position, also moves, which requires readjustment, which causes a problem that the adjustment work is very troublesome. Further, if only the adjustment function in the front-back and left-right directions is used, the orientation of the electrodes with respect to the head cannot be adjusted, and the work of appropriately adjusting the contact state between the head and the electrodes is troublesome, and a countermeasure technique is required.

The present invention has been made in view of such a situation, and an object of the present invention is to provide a technique for facilitating the work of adjusting the position of an electrode in an electroencephalogram measuring device.

According to the present invention
With the frame
An electroencephalogram electrode unit having an electrode portion used for detecting electroencephalograms and attached to the frame,
A direction adjustment mechanism that can adjust the mounting direction of the EEG electrode unit,
An electroencephalogram measuring device is provided.

According to the present invention, it is possible to provide a technique for facilitating the work of adjusting the position of an electrode in an electroencephalogram measuring device. That is, by making it possible to adjust the mounting direction of the electroencephalogram electrode unit, it becomes easy to adjust the direction in which the electrode hits the scalp.

It is a figure which shows typically the electroencephalogram measuring apparatus in the state attached to the human head which concerns on 1st Embodiment. It is a perspective view of the electroencephalogram measuring apparatus which concerns on 1st Embodiment. It is a figure which shows the electroencephalogram electrode unit which concerns on 1st Embodiment. It is a figure which showed the electrode holding part which concerns on 1st Embodiment. It is an exploded perspective view of the electrode holding part which concerns on 1st Embodiment. It is a vertical sectional view of the electrode holding part which concerns on 1st Embodiment. It is sectional drawing of the electrode holding part which concerns on 1st Embodiment. It is sectional drawing of the electrode holding part which concerns on 1st Embodiment. FIG. 3 is a perspective view of an electrode holding portion in a state where the third holding portion is swung according to the first embodiment. It is a figure explaining the transition of the fixed state of the electrode holding part and the fixing frame which concerns on 1st Embodiment. It is a perspective view of the electroencephalogram measuring apparatus which concerns on 2nd Embodiment. It is a perspective view which shows the electroencephalogram electrode unit which concerns on 2nd Embodiment. It is an exploded perspective view which shows the electroencephalogram electrode unit which concerns on 2nd Embodiment. It is a vertical sectional view which shows the electroencephalogram electrode unit which concerns on 2nd Embodiment. It is a vertical cross-sectional view which shows the electroencephalogram electrode unit in the state attached to the electrode holding part which concerns on 3rd Embodiment.

<< First Embodiment >>
<Overview of EEG measuring device 10>
The first embodiment of the present invention will be described with reference to FIGS. 1 to 10.
FIG. 1 is a diagram schematically showing an electroencephalogram measuring device 10 in a state of being attached to a human head 99. FIG. 2 is a perspective view of the electroencephalogram measuring device 10, and the electroencephalogram electrode unit 80 is omitted here.

The electroencephalogram measuring device 10 is attached to a human head 99, detects an electroencephalogram as a potential fluctuation from a living body, and outputs the detected electroencephalogram to a brain wave display device (not shown). The electroencephalogram display device acquires the electroencephalogram detected by the electroencephalogram measuring device 10, displays it on a monitor, stores data, and performs well-known electroencephalogram analysis processing.

<Structure of EEG measuring device 10>
As shown in FIG. 1, the electroencephalogram measuring device 10 has a plurality of electroencephalogram electrode units 80, a fixing frame 20, and an electrode holding portion 40 for attaching the electroencephalogram electrode unit 80 to the fixing frame 20. The electroencephalogram electrode unit 80 is attached to the electrode holding portion 40 and then attached to the fixing frame 20.

In the present embodiment, the electroencephalogram electrode unit 80 is provided for 5 channels (5 pieces), and along with this, 5 electrode holding portions 40 are also provided. The position of the 5ch (that is, the mounting position of the electroencephalogram electrode unit 80) corresponds to, for example, the positions of T3, C3, Cz, C4, and T4 in the international 10-20 electrode arrangement method.

<EEG electrode unit 80>
3A and 3B are views showing an electroencephalogram electrode unit 80, FIG. 3A is a front view, and FIG. 3B is a side view. The electroencephalogram electrode unit 80 is provided on a substantially cylindrical brain wave electrode unit main body 81 (body), an electrode protrusion 83 provided on one end side (lower side in the figure), and an electrode protrusion 83 provided on the other end side (upper side in the figure). It has a signal extraction unit 85.

A screw is formed on the electroencephalogram electrode unit main body 81. An electrode member is provided on the electrode protrusion 83, and the electrode member comes into contact with the scalp of the head 99 to acquire an electroencephalogram. The signal extraction unit 85 draws out a signal line extending from the electrode protrusion 83 and is connected to the above-mentioned electroencephalogram display device (not shown).

Further, although the details will be described later, an electrode cut surface 82 is formed on the side surface of the electroencephalogram electrode unit main body 81, and rotation is caused by the regulation surface 49a (see FIG. 6 described later) of the electrode insertion hole 49 of the electrode holding portion 40. The vertical movement ring portion 70, which is regulated and screw-fitted with the electroencephalogram electrode unit main body 81, is rotated. As a result, the electroencephalogram electrode unit 80 itself moves linearly up and down without rotation.

The electrode protrusion 83 is provided with a conductive electrode member in a structure of, for example, a rubber-like elastic body (silicone rubber or the like) having a predetermined shape, and a signal (electroencephalogram) detected by the electrode member is transmitted from a signal extraction unit 85 by a signal line. It is designed to be taken out.

The predetermined shape of the rubber-like elastic body exhibited by the electrode protrusion 83 is, for example, a shape in which a plurality of protrusions extend in an annular shape from a columnar base. A conductive electrode member is provided on the protrusion. The electrode protrusion 83 is fixed to the electroencephalogram electrode unit main body 81 (body portion) so as not to rotate.

The side surface portion of the electroencephalogram electrode unit main body 81 is screwed, and is screw-fitted with the vertical movement ring portion 70 described later. Further, on the electroencephalogram electrode unit main body 81, two electrode cut surfaces 82 cut out on vertical surfaces are formed at positions facing each other. That is, it has a shape (also referred to as an I-cut shape) having a D-cut on two opposite surfaces in a cross-sectional view.

<Structure of fixing frame 20 and electrode holding portion 40>
The structure of the electrode holding portion 40 and the fixing frame 20 to which the electrode holding portion 40 is attached will be described with reference to FIG. The fixing frame 20 and the electrode holding portion 40 are made of a hard member such as a polyamide resin, but the purpose is not limited to these materials, they do not affect the electroencephalogram detection, and are suitable for wearability and workability. Any material will do. Further, different materials may be used for the fixing frame 20 and the electrode holding portion 40.

<Structure of fixing frame 20>
The fixing frame 20 has a pair (two) of rails 21 arranged in parallel, and a rail fastening portion 23 for connecting the rails 21 so as to be passed at a plurality of places.

As shown in the figure, the pair of rails 21 are curved along the head 99. Further, the space surrounded by the pair of rails 21 and the rail fastening portion 23 is a movable region 29 in which the electrode holding portion 40 can move. That is, the movable region 29 is provided in a range in which the electrode holding portion 40 (electroencephalogram electrode unit 80) is arranged and moves within a certain range. In other words, the rail fastening portion 23 is provided at a position that does not hinder the movement of the electrode holding portion 40. In the present embodiment, the movable regions 29 are provided at five locations corresponding to each of the five electrode holding portions 40 (electroencephalogram electrode unit 80).

<Structure of fixing frame 40>
The structure of the electrode holding portion 40 will be described with reference to FIGS. 4 to 8.
4A and 4B are views showing the electrode holding portion 40, FIG. 4A is a side view, FIG. 4B is a plan view, and FIG. 4C is a perspective view. FIG. 5 is an exploded perspective view of the electrode holding portion 40, and shows a state in which FIG. 4 (c) is disassembled. FIG. 6 is a vertical cross-sectional view of the electrode holding portion 40, and is a cross-sectional view taken along the line A1-A1 of FIG. 4 (b). FIG. 7 is a cross-sectional view of the electrode holding portion 40, and is a cross-sectional view taken along the line A2-A2 of FIG. 4A. FIG. 8 is a cross-sectional view of the electrode holding portion 40, and is a cross-sectional view taken along the line A3-A3 of FIG. 4A.

The electrode holding portion 40 includes a first holding portion 41, a second holding portion 42, a third holding portion 43, and a vertical movement ring portion 70. The electrode holding portion 40 has an adjusting mechanism capable of adjusting the mounting direction of the electroencephalogram electrode unit 80, that is, the direction when the electrode projection 83 abuts on the head 99. Hereinafter, an example in which a biaxial swing mechanism that swings back and forth and left and right is applied as such an adjustment mechanism will be described, but as another mechanism, there is a ball joint mechanism described later in the third embodiment. ..

<First holding portion 41>
The first holding portion 41 is a substantially plate-shaped first holding portion 41 having a long rectangular shape in the front-rear direction, and a first holding portion 41 penetrating in the vertical direction (thickness direction) near the center of the first holding portion 41 in the front-rear direction and left-right direction. Has an opening 44 and an arm-shaped connecting portion 60 extending downward at each of the ends.

The first opening 44 is a substantially rectangular through-hole when viewed from above, and accommodates the second holding portion 42. On the wall surface in the front-rear direction of the first opening 44, a concave fitting recess 51 having a circular outer shape and a predetermined depth is provided at the center of the wall surface in the left-right and vertical directions. When the second holding portion 42 is accommodated, the fitting recess 51 is rotatably fitted with the first fitting projection 53, which will be described later.

The connecting portion 60 has a first connecting portion 61 extending downward from the lower surface 41b in the vicinity of each of the front and rear ends of the first holding portion 41, and a predetermined direction inward from the lower end of the first connecting portion 61. It has a second connecting portion 62 extending and a third connecting portion 63 extending upward from the inner end of the second connecting portion 62. Here, the inward direction means the direction of the end portions on the opposite sides of the front and rear, and specifically, the second connecting portion 62 extending from the first connecting portion 61 on the front side has a predetermined length on the rear side. Only postpone. The second connecting portion 62 extending from the first connecting portion 61 on the rear side extends to the front side by a predetermined length. At this time, the distance between the extending ends of the second connecting portion 62 is such that the electroencephalogram electrode unit 80 attached to the electrode holding portion 40 can tilt the electroencephalogram electrode unit 80 to a certain extent as described later. Leave.

Further, at the inner end of the second connecting portion 62, the third connecting portion 63 extends further upward by a predetermined length. The extending end portion (upper end portion) of the third connecting portion 63 does not hit the lower surface 41b of the first holding portion 41 and has a certain interval.

The space surrounded by the lower surface 41b of the first holding portion 41, the first connecting portion 61, the second connecting portion 62, and the third connecting portion 63 is referred to as a cotangent space 68. When the electrode holding portion 40 is attached to the rail 21, the rail 21 is accommodated in this extra space 68 (see, for example, FIG. 2). The distance between the upper end of the third connecting portion 63 and the lower surface 41b of the first holding portion 41 is used when the electrode holding portion 40 is attached to the rail 21.

<Second holding part 42>
The second holding portion 42 has a substantially rectangular outer shape when viewed from above, and has a frame shape having a second opening 46 penetrating vertically inside. The outer shape of the second holding portion 42 is slightly smaller than the first opening 44 of the first holding portion 41 and is separated to a certain extent. Further, the third holding portion 43 is housed in the second opening 46.

A cylindrical first fitting projection 53 projecting a predetermined length is provided on each of the upper, lower, left, and right centers on the outside of the side wall surface in front of and behind the second holding portion 42. The first fitting protrusion 53 is rotatably fitted into the fitting recess 51 of the first holding portion 41.

Fitting through holes 52 that penetrate the inside and outside of the frame are provided in each of the upper, lower, front, back, and center of the left and right wall surfaces of the second holding portion 42. In the fitting through hole 52, when the third holding portion 43 described later is accommodated in the second opening 46, the second fitting protrusion 54 provided in the third holding portion 43 is rotatable. It is fitted in.

<Third holding unit 43>
The third holding portion 43 integrally includes the base portion 43a, the tubular portion 43b, and the flange portion 43c in a positional relationship in which they overlap in the vertical direction. Further, an electrode insertion hole 49 that vertically penetrates the base portion 43a, the tubular portion 43b, and the flange portion 43c is provided. The electroencephalogram electrode unit 80 is inserted into the electrode insertion hole 49.

The base portion 43a is substantially rectangular (square) when viewed from above. On the left and right side wall surfaces of the base portion 43a, a second cylindrical fitting projection 54 projecting a predetermined length is provided. The second fitting protrusion 54 is rotatably fitted into the fitting through hole 52 of the second holding portion 42. Further, a part of the electrode insertion hole 49 is formed in the center of the base portion 43a when viewed from above.

The tubular portion 43b has a cylindrical shape extending upward from the upper surface of the base portion 43a by a predetermined length. Here, the outer shape of the top view of the cylindrical shape is large enough to be inscribed in the square presented by the base portion 43a. A part of the electrode insertion hole 49 is formed in the center of the tubular portion 43b when viewed from above.

The flange portion 43c is formed at the upward end of the tubular portion 43b in a disk shape (flange shape) when viewed from above. The flange portion 43c is rotatably fitted into the flange fitting recess 72 formed on the inner wall surface of the vertical movement ring portion 70, which will be described later. A part of the electrode insertion hole 49 is formed in the center of the flange portion 43c when viewed from above.

<Electrode insertion hole 49>
As described above, the third holding portion 43 is provided with an electrode insertion hole 49 that vertically penetrates the base portion 43a, the tubular portion 43b, and the flange portion 43c in the vertical direction, that is, in the center of the top view.

The electrode insertion hole 49 exhibits a shape corresponding to the electrode cut surface 82 (I-cut shape) of the above-mentioned electroencephalogram electrode unit 80. That is, in the electrode insertion hole 49, two regulation surfaces 49a are formed at opposite positions in the circular through hole. The position of the regulation surface 49a is not particularly limited, but in the present embodiment, it is formed on the front and rear sides of the electrode insertion hole 49. With such a shape of the electrode insertion hole 49, the electroencephalogram electrode unit 80 can move up and down freely when inserted into the electrode insertion hole 49, but the fitting structure of the electrode cut surface 82 and the electrode insertion hole 49 Cannot rotate due to. That is, the electroencephalogram electrode unit 80 moves linearly up and down without rotation. In the following, the fitting structure in which the electroencephalogram electrode unit 80 is operated up and down without rotation as described above will be referred to as a rotation-restricted fitting structure for convenience.

<Ring part for vertical movement 70>
The vertical movement ring portion 70 is formed in a ring shape with a predetermined thickness. A flange fitting recess 72 formed in a concave shape at a predetermined depth is formed on the lower portion of the inner peripheral surface 71 of the vertical movement ring portion 70. The flange fitting recess 72 is rotatable without interfering with the outer peripheral surface of the flange portion 43c when the flange portion 43c is fitted.

The circular ring inner peripheral surface 71 has an inner diameter substantially the same as the electrode insertion hole 49 and is coaxial with the vertical movement ring portion 70 fitted in the flange portion 43c. Further, the electrode insertion hole 71 is screwed and screw-fitted with the screw formed on the side surface of the electroencephalogram electrode unit main body 81 of the electroencephalogram electrode unit main body 81.

Unlike the electrode insertion hole 49 of the electrode holding portion 40, the inner peripheral surface 71 of the ring is not formed with a regulating surface or the like, and the vertical movement ring portion 70 screw-fitted to the electroencephalogram electrode unit 80 is rotatable. be.

When the electroencephalogram electrode unit 80 is inserted into the vertical movement ring portion 70 and the electrode insertion holes 71 and 49 of the electrode holding portion 40 while the vertical movement ring portion 70 is attached to the electrode holding portion 40, the vertical movement ring portion 70 is inserted. Unless operated, the electroencephalogram electrode unit 80 is not inserted any more, that is, it cannot move in the vertical direction with respect to the electrode holding portion 40. That is, when moving the electroencephalogram electrode unit 80 in the vertical direction, an operation of rotating the vertical movement ring portion 70 in a predetermined direction is performed.

<Angle adjustment function of the electroencephalogram electrode unit 80 by the electrode holding portion 40>
The angle adjusting function of the electroencephalogram electrode unit 80 by the electrode holding portion 40 will be further described with reference to FIG. 9A and 9B are perspective views of the electrode holding portion 40, FIG. 9A is a perspective view seen from above, and FIG. 9B is a perspective view seen from below, both of which are third holding portions. It shows a state in which the direction of 43 is slanted.

As described above, in the electrode holding portion 40, the first holding portion 41 and the second holding portion 42 are attached by fitting the first fitting protrusion 53 into the fitting recess 51. With this structure, the second holding portion 42 realizes a swing function (second swing function) that swings left and right within a certain range with the first fitting projection 53 as an axis. At this time, the swing axis (that is, the projecting direction of the first fitting projection 53) is oriented in a direction orthogonal to the extending direction of the fixing frame 20. The swingable range is determined by the size (that is, the distance between them) and the thickness of the first opening 44 and the second holding portion 42, and is a range that does not interfere when swinging.

Further, in the electrode holding portion 40, the second holding portion 42 and the third holding portion 43 are attached by fitting the second fitting projection 54 into the fitting through hole 52. With this structure, the third holding portion 43 realizes a swing function (first swing function) that swings back and forth within a certain range about the second fitting projection 54 as an axis. At this time, the swing axis (that is, the projecting direction of the second fitting projection 54) is the same as the extending direction of the fixing frame 20. The swingable range is determined by the size (that is, the distance between them) and the thickness of the second opening 46 and the third holding portion 43 (base portion 43a), and is a range that does not interfere when swinging. It is said that.

In this way, the electrode holding portion 40 can swing the electroencephalogram electrode unit 80 in the front-back and left-right directions within a certain range. FIG. 9 shows a state in which the third holding portion 43 is swung so as to be tilted forward. By swinging the electrode holding portion 40 back and forth and left and right in this way, the orientation of the electroencephalogram electrode unit 80 attached to the electrode holding portion 40 can be adjusted. That is, it becomes easy to adjust the angle when the electrode projection 83 of the electroencephalogram electrode unit 80 hits the head 99.

The first fitting protrusion 53 (second swing shaft) and the second fitting protrusion 54 (first swing shaft) are not swinging, that is, the electrode insertion hole 49. It is provided on the same plane when the orientation is vertical. With this configuration, the two-axis swing mechanism can be miniaturized.

<Adjustment function of the fixed state by the ring portion 70 for vertical movement>
A fixed state adjusting function by the vertical movement ring portion 70 will be described with reference to FIG. 10. FIG. 10 is a diagram illustrating the transition of the fixed state of the electrode holding portion 40 and the fixing frame 20. The following will be described in relation to the non-rotating linear motion of the electroencephalogram electrode unit 80.

FIG. 10A shows a state in which the electrode holding portion 40 to which the electroencephalogram electrode unit 80 is attached is arranged on the fixing frame 20 (rail 21). In this state, the rail 21 and the electrode holding portion 40 are not fixed, and the electrode holding portion 40 can move up, down, left, and right with respect to the rail 21 and in the extending direction of the rail 21.

In FIG. 10B, the vertical movement ring portion 70 is rotated in a predetermined direction to directly move the electroencephalogram electrode unit 80 downward (head 99 side), and the electrode protrusion 83 abuts on the head 99. , The rail 21 is in contact with the contact surface 65 of the connecting portion 50.

When the vertical movement ring portion 70 is further rotated from this state to directly move the electroencephalogram electrode unit 80 downward, the fixed state between the rail 21 and the contact surface 65 becomes stronger. Further, the tip of the electrode protrusion 83 in contact with the head 99 is bent, and the force with which the electrode protrusion 83 is pressed against the scalp becomes stronger. That is, as the pressure contact state between the electrode protrusion 83 of the electroencephalogram electrode unit 80 and the scalp (head 99) becomes stronger, the electrode holding portion 40 (contact surface 65 of the connecting portion 60) and the rail 21 are strongly fixed. Become. On the contrary, when it is desired to loosen the pressure contact state, the electroencephalogram electrode unit 80 is changed from the state of FIG. 10 (b) to the state of FIG. 10 (a) by rotating the vertical movement ring portion 70 in the direction opposite to the above rotation direction. ..

FIG. 10 (c) shows a state in which the electroencephalogram electrode unit 80 attached to the electrode holding portion 40 is swung so as to tilt forward from the state of FIG. 10 (a). For example, the state shown in FIG. 10B is set, but when it is desired to adjust the direction in which the electrode projection 83 of the electroencephalogram electrode unit 80 abuts on the head 99, the state is returned to the state shown in FIG. 10A, and further. By swinging the electroencephalogram electrode unit 80 back and forth and left and right by a predetermined amount, the electroencephalogram electrode unit 80 is adjusted in an appropriate direction. It can also be moved back and forth and left and right as needed. After that, the vertical movement ring portion 70 is rotated to bring the electroencephalogram electrode unit 80 into pressure contact with the head 99.

As described above, the electrode holding portion 40 has a fixed structure in which two parallel rails 21 are fixed by the two connecting portions 50. In this fixing structure, the electroencephalogram electrode unit 80 moves up and down in a non-rotatable manner with respect to the electrode holding portion 40 by the ball screw mechanism, and the fixing strength is adjusted by the amount of the direct movement. That is, with the linear movement of the electroencephalogram electrode unit 80 due to the rotation of the vertical movement ring portion 70, the two connecting portions 60 provided in the electrode holding portion 40 are pressed against the two parallel rails 21. As a result, the attachment operation of the electroencephalogram electrode unit 80 (position adjustment operation in the vertical direction) and the fixing operation of the rail 21 and the electrode holding portion 40 (connecting portion 60) proceed at the same time. That is, as the electroencephalogram electrode unit 80 is directly moved and the pressure contact state (electrode contact state) with the pushing head 99 becomes stronger, the fixed state of the rail 21 and the electrode holding portion 40 also becomes stronger. Further, by adjusting the direction of the electroencephalogram electrode unit 80 as desired by the angle adjusting function of the electrode holding portion 40, the direction in which the electrode projection 83 hits the head 99 can be optimized.

This mounting operation, fixing operation, and angle adjustment operation are performed independently by the respective electrode holding portions 40. Therefore, the attachment work and the position adjustment work of a certain electroencephalogram electrode unit 80 do not affect the attachment state of another electroencephalogram electrode unit 80. Further, since the electroencephalogram electrode unit 80 moves linearly, a state in which hair is caught by rotation occurs, and a state in which hair is caught between the rail 21 and the electrode holding portion 40 can be suppressed.

Further, in a state where the electroencephalogram electrode unit 80 is not fixed to the electrode holding portion 40, a cotangent space 68 is provided in which the relative position between the connecting portion 50 and the rail 21 can be adjusted. As a result, the following functions and effects can be realized.

That is, within the range of this extra space 68, the position of the connecting portion 60 can be adjusted up, down, front, back, left, and right relative to the rail 21. This does not affect the fixed state of the other electrode holding portions 40. Further, the extra space 68 makes it possible to adjust the relative position of the connecting portion 60 and the rail 21 in the extending direction (extending direction). That is, the position of the electroencephalogram electrode unit 80 can be adjusted in the left-right direction within the range in which the movable region 29 is formed. Further, the extra space 68 allows the connecting portion 60 and the rail 21 to adjust the positions of the two rails 21 in the passing direction. That is, the position of the electrode holding portion 40 can be adjusted in the width direction of the rail 21 (front-back direction in the drawing). Further, the position of the connecting portion 60 and the rail 21 in the distance direction between the rail 21 and the head 99 can be adjusted by the extra space 68. That is, the electrode holding portion 40 (connecting portion 60) can move up and down within the range of the cotangent space 68.

The fixing of each electrode holding portion 40 and the electrode portion (electroencephalogram electrode unit 80) is independent of the fixing of the other electrode holding portions 40 and the electrode portion (electroencephalogram electrode unit 80). Therefore, when the fixed position or angle of a certain electroencephalogram electrode unit 80 is adjusted, the fixing work / angle adjusting work between the other electrode holding portion 40 and the electrode portion (electroencephalogram electrode unit 80) is not affected.

If there is a change in the fixed state of the electroencephalogram electrode unit 80 whose fixed state or detection level has been adjusted, it may be necessary to adjust the detection level or the like again. That is, if the adjustment of the fixed state of one electroencephalogram electrode unit 80 affects the fixed state of another electroencephalogram electrode unit 80, the above adjustment work is required and it takes time to detect the electroencephalogram. However, in the electroencephalogram measuring device 10 of the present embodiment, such useless work can be avoided.

Further, the electroencephalogram electrode unit 80 does not have an elastic member that can be turned to itself. That is, the orientation of the electroencephalogram electrode unit 80 is adjusted by the above-mentioned swing mechanism. Further, the orientation is fixed by operating the vertical movement ring portion 70. Therefore, there is no concern that the orientation of the electroencephalogram electrode unit 80 will change after fixation.

<Features / Functions of EEG Measuring Device 10>
The features and functions of the electroencephalogram measuring device 10 of the present embodiment are summarized as follows.
(1) The electroencephalogram measuring device 10 is
Frame (fixing frame 20) and
An electroencephalogram electrode unit 80 having an electrode projection 83 (electrode portion) used for detecting electroencephalograms and attached to a frame,
A direction adjustment mechanism that makes it possible to adjust the mounting direction of the EEG electrode unit 80,
Have.
As the direction adjusting mechanism, there are a two-axis swing mechanism, a multi-axis swing mechanism having two or more axes, and a ball joint mechanism. With such a configuration, the orientation of the electrode projection 83 of the electroencephalogram electrode unit 80 when it comes into contact with the head 99 can be optimized, and stable electroencephalogram measurement can be realized.
(2) The direction adjustment mechanism is
A first fixing portion (third holding portion 43) to which the electroencephalogram electrode unit 80 is attached, and
A second fixing portion to which the first fixing portion (third holding portion 43) is attached,
A frame to which the second fixing portion (second holding portion 42) is attached, and
A first swing mechanism that allows the first fixed portion (third holding portion 43) and the second fixed portion (second holding portion 42) to swing.
It has a second fixing portion (second holding portion 42), a frame, and a second swinging mechanism that enables swinging.
The simple structure of the first and second swing mechanisms (that is, the biaxial swing mechanism) facilitates the optimization of the orientation of the electroencephalogram electrode unit 80.
As described above, when the frame is composed of the fixing frame 20, the rail 21, and the electrode holding portion 40 as shown in FIGS. 1 and 2, the second fixing portion (second holding portion) is used. The portion 42) may be attached to the third fixing portion (that is, the first holding portion 41) and further attached to the fixing frame 20 (rail 21). In this case, the second fixing portion (second holding portion 42) swings with respect to the third fixing portion (first holding portion 41) about a predetermined swing axis.
(3) The first swing shaft of the first swing mechanism (that is, the swing shaft by the second fitting projection 54) and the second swing shaft of the second swing mechanism (that is, the first fitting). The swing axis by the joint projection 53) is orthogonal.
As described above, the biaxial swing mechanism facilitates the adjustment (optimization) of the orientation of the electroencephalogram electrode unit 80.
(4) The first swing shaft (that is, the swing shaft by the second fitting protrusion 54) and the second swing shaft (that is, the swing shaft by the first fitting protrusion 53) are provided on the same plane. ing.
(5) The electroencephalogram electrode unit 80 does not have an elastic member capable of changing the direction of the electroencephalogram electrode unit 80.
(6) The frame has a pair of rails 21 provided in parallel, and a fixing frame 20 mounted on the head 99 and a fixing frame 20.
A plurality of electrode holding portions 40 to which the electroencephalogram electrode unit 80 is attached, and
Have,
The electrode holding portion 40 has a direction adjusting mechanism and also has a connecting portion 60 for connecting to each of the rails 21.
In the state where the electroencephalogram electrode unit 80 is not attached, the connecting portion 60 and the rail 21 are not fixed, and as the electroencephalogram electrode unit 80 is attached and the pressure contact state between the electroencephalogram electrode unit 80 and the scalp becomes stronger, the electroencephalogram electrode The fixing between the unit 80 and the rail 21 becomes stronger.

<< Second Embodiment >>
<Overview of EEG measuring device 10>
A second embodiment of the present invention will be described with reference to FIGS. 11-14. FIG. 11 is a perspective view of the electroencephalogram measuring device 100. FIG. 12 is a perspective view of the electroencephalogram electrode unit 110. FIG. 13 is an exploded perspective view of the electroencephalogram electrode unit 110. FIG. 14 is a vertical cross-sectional view of the electroencephalogram electrode unit 110.

The electroencephalogram measuring device 100 of the present embodiment has a configuration in which the electroencephalogram electrode unit 80 of the electroencephalogram measuring device 10 described in the first embodiment is an electroencephalogram electrode unit 110 having a pressure adjusting mechanism for the head 99. Hereinafter, the description will be focused mainly on the configurations / functions different from those of the first embodiment, and the description of the same configurations / functions will be omitted as appropriate. In addition, in FIGS. 11 to 13, the electrode projection 83 is omitted. Further, the electrode holding portion 40 of FIG. 11 has a partially different shape from the electrode holding portion 40 (mainly the connecting portion 60) of the first embodiment, but holds the basic structure and function (electroencephalogram electrode unit 80). The function of attaching to the fixing frame 20 and the like) is the same, and the electrode holding portion 40 having the shape of the first embodiment can also be used.

The electroencephalogram measuring device 100 has a plurality of electroencephalogram electrode units 110, a fixing frame 20, and an electrode holding portion 40 for attaching the electroencephalogram electrode unit 110 to the fixing frame 20. The electroencephalogram electrode unit 110 is attached to the electrode holding portion 40 and then attached to the fixing frame 20. Also in this embodiment, as in the first embodiment, 5 channels (5 pieces) of electrode holding portions 40, a vertical movement ring portion 70, and an electroencephalogram electrode unit 110 are provided.

<EEG electrode unit 110>
The electroencephalogram electrode unit 110 includes a pressure adjusting mechanism for adjusting the pressure contact force of the electroencephalogram electrode unit 110 (that is, the electrode projection 83) with respect to the head 99. Specifically, the electroencephalogram electrode unit 110 has a base portion 111 including a cap portion 120 and an outer cylinder portion 130, a plunger portion 140, and a compression spring 150, and realizes a pressure adjusting mechanism. An electrode protrusion 83 is attached to the plunger tip portion 145 of the plunger portion 140 (for example, shown by a broken line in FIG. 14).

<Base 111>
The base 111 is attached to the fixing frame 20 so as to project in the direction of the head 99. The base portion 111 has a cylindrical outer cylinder portion 130 and a bottomed cylindrical cap portion 120 that is screwed and attached to an opening at one end (here, the upper end portion in the drawing) of the outer cylinder portion 130.

<Cap part 120>
The cap portion 120 has a circular top surface and a cylindrical peripheral surface hanging from the peripheral edge of the top surface. A through hole 121 is provided in the center of the top surface and functions as a signal extraction unit. Further, a screw is provided on the inner surface of the cylindrical shape, and the screw is fitted to the upper end portion of the screw portion 132 on the outer peripheral surface of the outer cylinder portion 130. Further, the lower surface in the drawing of the top surface functions as a spring arrangement surface 126, and the upper end portion of the compression spring 150 comes into contact with the surface.

<Outer cylinder 130>
The outer cylinder portion 130 is provided with a threaded portion 132 on the outer peripheral surface, and is screw-fitted into the electrode holding portion 40 (electrode insertion hole 49) similar to that of the first embodiment. Further, the outer cylinder portion 130 has a cut portion 133 that is flatly cut into two opposing regions on the outer peripheral surface and functions as an I-cut portion, and a groove-shaped notch in the region of the cut portion 133 downward by a predetermined length from the upper end of the drawing. It has a guide groove portion 134 and the like. The cut portion 133 of the present embodiment is a portion corresponding to the electrode cut surface 82 of the first embodiment (see, for example, FIG. 3A).

The outer cylinder portion 130 has a rotation-restricted fitting structure in which rotation is restricted by the cut portion 133 of the screwed portion 132 and the restricted surface 49a of the electrode insertion hole 49 of the electrode holding portion 40 having the same configuration as that of the first embodiment. Has been realized. Further, by rotating the vertical movement ring portion 70 screw-fitted with the electroencephalogram electrode unit 110, the electroencephalogram electrode unit 80 itself directly moves up and down without rotation. That is, the threaded portion 132 of the outer cylinder portion 130 functions as a position adjusting portion for adjusting the amount of protrusion from the fixing frame 20.

<Plunger section 140>
The plunger portion 140 is arranged inside the through hole 131 of the outer cylinder portion 130. The outer diameter of the plunger portion 140 is substantially the same as the diameter of the through hole 131. Further, two display pieces 144 are provided so as to project at opposite positions on the upper peripheral surface of the plunger portion 140. When the plunger portion 140 is arranged inside the through hole 131 of the outer cylinder portion 130, the display piece 144 is exactly located in the guide groove portion 134 of the through hole 131.

An electrode protrusion 83 is attached to the plunger tip portion 145 of the plunger portion 140. The signal line 155 extending from the electrode projection 83 is drawn out from the upper part of the cap portion 120 via the through

holes

141, 131, 121 at the center of the shaft.

When the inside of the outer cylinder portion 130 (that is, the inside of the through hole 131) slides in the plunger portion 140, the display piece 144 is arranged and moved in the guide groove portion 134, so that the plunger portion 140 does not rotate and the guide portion 140 does not rotate. It can move up and down within the range of the groove 134.

<Compression spring 150>
The compression spring 150 is arranged between the spring arrangement surface 126 of the cap portion 120 and the plunger upper end portion 146 of the plunger portion 140. The compression spring 150 urges the plunger portion 140 toward the head 99.

<Pressure adjustment function of EEG electrode unit 110>
As shown in FIG. 14A, in a state where no external force (more specifically, a force in the upward direction shown in the drawing) is applied to the plunger portion 140 (that is, the electrode protrusion 83), the urging force of the compression spring 150 causes the plunger portion 140 (that is, the electrode protrusion 83) to be subjected to an external force (more specifically, a force in the upward direction shown in the drawing). The plunger portion 140 is in the most protruding state from the outer cylinder portion 130. At this time, the display piece 144 comes into contact with the lowermost portion (groove bottom portion) of the guide groove portion 134, so that the plunger portion 140 cannot move further downward.

As shown in FIG. 14B, when the plunger portion 140 (that is, the electrode protrusion 83) is pressed against the head 99 and a force in the upward direction in the drawing acts on the plunger portion 140, the plunger portion 140 opposes the urging force of the compression spring 150. Moves upwards. Here, with respect to the state of FIG. 14A, the plunger portion 140 moves upward by the displacement amount d. As the compression spring 150 is compressed, the force acting on the head 99 gradually increases.

The urging force can be adjusted by selecting a compression spring 150 having a different spring constant, length, etc. Further, the distance between the spring arrangement surface 126 and the upper end portion 146 of the plunger can be adjusted by making it possible to adjust the fitting amount of the outer cylinder portion 130 into the cap portion 120 and providing a spacer in the arrangement portion of the compression spring 150. , The urging force may be adjustable.

<Pressure display function of display piece 144>
The display piece 144 can indicate the compressed state of the compression spring 150 by displaying its position to the outside when the guide groove portion 134 is moved. That is, the position of the display piece 144 is associated with the pressure contact force acting on the head 99. By providing a mark (scale) as an index of the pressure contact force acting on the guide groove portion 134, the pressure contact force acting on the head 99 can be grasped more accurately.

<Features / Functions of EEG Measuring Device 10>
The features and functions of the electroencephalogram measuring device 10 of the present embodiment are summarized as follows.
First, it has the same features / functions as the features / functions (1) to (6) of the first embodiment described above.
Further, it has the following features / functions (7) to (10).
(7) A pressure adjusting mechanism for adjusting the pressure contact force of the electroencephalogram electrode unit 110 (that is, the electrode protrusion 83) with the head 99 is provided.
When the electroencephalogram measuring device 10 is attached to the head 99, the pressure contact force of the electrode protrusion 83 with the head 99 can be optimized, and it is necessary for the electroencephalogram measurement while suppressing the discomfort (especially pain) felt by a person. The contact state with the head 99 can be surely realized.
Further, as mainly described in the first embodiment, since the electrode holding portion 40 has an angle adjusting function, the state in which the electrode projection 83 is in contact with the head 99 can be further optimized, and stable electroencephalogram measurement is realized. can.
(8) The pressure adjusting mechanism includes a base portion 111 (cap portion 120, outer cylinder portion 130) attached to the fixing frame 20 so as to project toward the head.
A plunger portion 140 (movable piece) provided so as to be movable from the base portion 111 toward the head direction, and
A compression spring 150 (elastic member) that urges the plunger portion 140 toward the head, and
A display piece 144 (display unit) that displays the compression state of the compression spring 150, and
Have.
Since the plunger portion 140 provided with the electrode protrusions 83 is mounted on the head 99 in a state of being urged by the compression spring 150, the compression spring 150 is gradually compressed at the time of mounting, and the force acting on the head 99 is gradually applied. growing. Therefore, it is possible to suppress the person from feeling uncomfortable. Further, by replacing the compression spring 150, the amount of force acting on the head 99 can be adjusted.
Further, the angle adjusting function facilitates fine adjustment because the plunger portion 140 can be moved upward when adjusting the direction of the electroencephalogram electrode unit 110 (that is, the direction of the electrode projection 83).
(9) The compressed state of the compression spring 150 displayed on the display piece 144 is associated with the pressure contact force acting on the head 99.
By making the display piece 144 recognizable from the outside, the compressed state of the compression spring 150 can be easily grasped. By providing a scale in the vicinity of the guide groove portion 134, the compressed state can be grasped more accurately.
(10) The base portion 111 (here, the outer cylinder portion 130) includes a position adjusting portion for adjusting the amount of protrusion from the fixing frame 20.
More specifically, the threaded portion 132 of the outer cylinder portion 130 is screwed into the electrode holding portion 40 and moves up and down by operating the vertical movement ring portion 70. As a result, the amount of protrusion of the electroencephalogram electrode unit 110 from the fixing frame 20 can be adjusted. Further, by preparing the outer cylinder portions 130 having different lengths, it is possible to flexibly respond to various conditions (head shape, hair amount, etc.). For example, by changing the plunger portion 140 or the above-mentioned compression spring 150 depending on the measurement position (channel position), stable and good EEG measurement is realized without causing discomfort to the EEG measurer. can.

<< Third Embodiment >>
A third embodiment of the present invention will be described with reference to FIG. FIG. 15 is a vertical cross-sectional view showing a part of the electroencephalogram measuring device 10 in a state where the electroencephalogram electrode unit 210 is attached to the electrode holding portion 40 (frame). In the first embodiment described above, as the direction adjusting mechanism of the electroencephalogram electrode unit 80, a biaxial swing mechanism (first) that swings the electroencephalogram electrode unit 80 attached to the electrode holding portion 40 (frame) back and forth and left and right. An example of the holding portion 41 and the second holding portion 42) has been described. In this embodiment, an example in which a ball joint mechanism (ball kinematic pair) is applied as a direction adjustment mechanism will be described. Hereinafter, the direction adjustment mechanism will be focused on and described. The electroencephalogram electrode unit 210 has a structure having the pressure adjusting mechanism described in the second embodiment.

The electroencephalogram electrode unit 210 has a base portion 211 including a cap portion 220 and an outer cylinder portion 230, a plunger portion 240, and a compression spring 250, and realizes a pressure adjusting mechanism similar to that of the second embodiment. An electrode protrusion 283 is attached to the plunger tip portion 245 of the plunger portion 240. A signal line (not shown) is attached to the electrode protrusion 283 as in the second embodiment, and is drawn out from the cap portion 220 through the inside of the outer cylinder portion 230, for example.

The direction adjusting mechanism has a sphere portion 270, a housing portion 260, and a sphere fixing portion 290. The spherical portion 270 is provided in a spherical shape around the outer cylinder 230 of the electroencephalogram electrode unit 210. In other words, the electroencephalogram electrode unit 210 is configured to penetrate the spherical portion 270 of the sphere.

The housing portion 260 is provided integrally with the electrode holding portion 240 in an upwardly convex tubular shape. The housing portion 260 has a sphere accommodating surface 263 forming a sphere kinematic pair together with the sphere portion 270. An opening 265 is provided at the center of the sphere accommodating surface 263, and the electroencephalogram electrode unit 210 penetrates the opening 265. A threaded portion 269 is provided on the outer peripheral surface of the housing portion 260.

The sphere fixing portion 290 is formed in a ring shape, and the electroencephalogram electrode unit 210 penetrates from the opening at the center of the ring. A holding surface 291 and a screwed portion 299 are provided on the inner surface of the sphere fixing portion 290.

The threaded portion 269 of the housing portion 260 and the threaded portion 299 of the sphere fixing portion are screwed into each other, and by operating the sphere fixing portion 290, the sphere portion 270 is replaced with the housing portion 260 (more specifically, the sphere accommodating surface 263). ) Can be fixed or released.

The shapes of the sphere accommodating surface 263, the sphere portion 270, and the holding surface 291 can take various shapes as long as they exhibit their respective functions.

In a state where the sphere portion 270 is not fixed to the housing portion 260, the sphere portion 270 is rotatable, and the orientation of the electroencephalogram electrode unit 210 integrated with the sphere portion 270 can be adjusted. The orientation of the electroencephalogram electrode unit 210 can be adjusted individually.

The features and functions of the electroencephalogram measuring device 10 of the present embodiment are summarized as follows.
Features / Functions of the above-mentioned first and second embodiments It has the same features / functions as (1) to (10). Further, it has the following features / functions (11).
(11) The direction adjustment mechanism is
A spherical portion 270 attached so that the electroencephalogram electrode unit 210 penetrates, and
A housing portion 290 provided on the electrode holding portion 240 (frame) for rotatably arranging the spherical portion 270, and a housing portion 290.
A sphere fixing portion 290 that fixes the sphere portion 270 arranged in the housing portion 260 so as not to rotate, and a sphere fixing portion 290.
Have,
The housing portion 260 has an opening 265 through which the electroencephalogram electrode unit 210 penetrates.
The electroencephalogram electrode unit 210 is rotatable in a state where the sphere portion 270 is arranged in the housing portion 260 and is not fixed by the sphere fixing portion 290.
With such a configuration, when the electroencephalogram measuring device 10 is attached to the head 99, if the orientation of the electroencephalogram electrode unit 210 is inappropriate (in other words, adjustment is required), it is considered inappropriate. The electroencephalogram electrode unit 210 can be individually adjusted, and the contact state of the electroencephalogram electrode unit 210 that does not require adjustment with the head 99 is not affected.

Although the embodiments of the present invention have been described above with reference to the drawings, these are examples of the present invention, and various configurations (modifications) other than the above can be adopted. For example, in the second embodiment, the pressure adjusting function is realized together with the angle adjusting mechanism of the first embodiment, but the configuration omitting the angle adjusting mechanism, that is, the configuration of only the pressure adjusting function may be used. In this case, it is difficult to finely adjust the orientation of the electroencephalogram electrode unit 110, but even when the electroencephalogram measuring device 10 is attached to the head 99, the state of the hair is changed while the plunger portion 140 is moved up and down to change the head of the electrode protrusion 83. By adjusting the pressure contact state with 99, suitable electroencephalogram measurement can be realized.

This application claims priority on the basis of Japanese Application Japanese Patent Application No. 2020-114779 filed on July 2, 2020 and Japanese Application Japanese Patent Application No. 2020-209286 filed on December 17, 2020. , All of its disclosures are taken here.

10, 100 EEG measuring device 20 Fixing frame 21 Rail 23 Rail fastening part 29 Movable area 40 Electrode holding part 41 First holding part 42 Second holding part 43 Third holding part

43a Base part

43b Cylinder part

43c Flange part 44 First opening 46 Second opening 49 Electrode insertion hole 49a Restriction surface 51 Fitting recess 52 Fitting through hole 53 First fitting protrusion 54 Second fitting protrusion 60 Connecting portion 61 First connection Part 62 Second connecting part 63 Third connecting part 65 Contact surface 68 Extra space 70 Vertical movement ring part 71 Inner peripheral surface 72

Flange fitting recess

80, 110, 210 EEG electrode unit 81 EEG electrode unit body 82

Electrode cut Surface

83, 283 Electrode protrusion 85 Signal extraction part 99

Head

111, 211

Base part

120, 220

Cap part

121, 131, 141 Through hole 126 Spring arrangement surface 130 Outer cylinder part 132 Screw part 133 Cut part 134

Guide groove part

140, 240 Flange part 142 Flange outer peripheral surface 143 Cut part 144 Display piece 145 Plunger tip part 146 Plunger

upper end part

150, 250 Compression spring 155 Signal line 260 Housing part 263 Sphere accommodation surface 265 Opening 270 Sphere part

Claims

With the frame
An electroencephalogram electrode unit having an electrode portion used for detecting electroencephalograms and attached to the frame,
A direction adjustment mechanism that can adjust the mounting direction of the EEG electrode unit,
An electroencephalogram measuring device.
The direction adjustment mechanism is
The first fixing portion to which the electroencephalogram electrode unit is attached and
The first fixing portion is attached, and the second fixing portion attached to the frame is attached.
A first swing mechanism that allows the first fixing portion and the second fixing portion to swing,
The second fixing portion, the frame, and the second swing mechanism capable of swinging,
The electroencephalogram measuring device according to claim 1.
The electroencephalogram measuring device according to claim 2, wherein the first swing axis of the first swing mechanism and the second swing axis of the second swing mechanism are orthogonal to each other.
The electroencephalogram measuring device according to claim 3, wherein the first swing axis and the second swing axis are provided on the same plane.
The direction adjustment mechanism is
A sphere portion attached so that the electroencephalogram electrode unit penetrates, and
A housing portion provided on the frame for rotatably arranging the spherical portion, and a housing portion.
A sphere fixing portion arranged in the housing portion and
Have,
The housing portion has an opening through which the electroencephalogram electrode unit penetrates.
The electroencephalogram measuring device according to claim 1.
The electroencephalogram measuring device according to any one of claims 1 to 5, wherein the electroencephalogram electrode unit does not have an elastic member capable of changing the direction of the electroencephalogram electrode unit.
The electroencephalogram measuring device according to any one of claims 1 to 6, further comprising a pressure adjusting mechanism for adjusting the pressure contact force of the electroencephalogram electrode unit with the head.
The pressure adjusting mechanism is
A base attached to the frame so as to project toward the head,
A movable piece provided so as to be movable from the base toward the head,
An elastic member that urges the movable piece toward the head,
A display unit that displays the compressed state of the elastic member, and
7. The electroencephalogram measuring device according to claim 7.
The electroencephalogram measuring device according to claim 8, wherein the compressed state of the elastic member displayed on the display unit is associated with the pressure contact force acting on the head.
The electroencephalogram measuring device according to claim 8 or 9, wherein the base portion includes a position adjusting unit for adjusting the amount of protrusion from the frame.
The electroencephalogram measuring device according to any one of claims 7 to 10, wherein the pressure adjusting mechanism is provided in the electroencephalogram electrode unit.
The frame is
A fixing frame that has a pair of rails installed in parallel and is attached to the head,
A plurality of electrode holding portions to which the electroencephalogram electrode unit is attached, and
Have,
The electrode holding portion has the direction adjusting mechanism and also has a connecting portion for connecting to each of the rails.
In the state where the electroencephalogram electrode unit is not attached, the connecting portion and the rail are not fixed, and as the electroencephalogram electrode unit is attached and the pressure contact state between the electroencephalogram electrode unit and the scalp becomes stronger, the electroencephalogram The fixing between the electrode unit and the rail becomes stronger.
The electroencephalogram measuring device according to any one of claims 1 to 11.