Electroencephalogram measurement device

Abstract

This electroencephalogram measurement device (10) is provided with a support body (110), an elastic member (130), an electroencephalogram electrode member (120), and a holding member (140). The support body (110) can be attached to the head. The elastic member (130) is elastically deformable and is provided with a first through-hole (131). The electroencephalogram electrode member (120) is held by the support body (110) via the elastic member (130). The holding member (140) passes through the first through-hole (131), one end (141) holding the electroencephalogram electrode member (120), and the other end (142) being exposed to the outside of the support body (110).

Description

EEG measuring device

[0001] The present invention relates to an electroencephalogram measuring device.

[0002] In electroencephalogram (EEG) measurements, electrodes are placed on the head to conduct electrical measurements.

[0003] Patent Document 1 describes measuring electroencephalograms by bringing the tips of electrode pins supported by an elastic member into contact with the scalp.

[0004] Japanese Patent Application Laid-Open No. 2020-000268

[0005] However, hair may be interposed between the EEG electrodes and the scalp, and it is necessary to part the hair to ensure good contact between the EEG electrodes and the scalp. With the structure described in Patent Document 1, the EEG electrodes cannot be moved freely, making it difficult to part the hair.

[0006] The present invention provides an electroencephalogram measuring device that can bring electroencephalogram electrodes into stable contact with the scalp.

[0007] According to one aspect of the present invention, there is provided the following electroencephalogram measuring device.

[0008] 1. An electroencephalogram measuring device comprising: a support that can be worn on the head; an elastic member that is elastically deformable and has a first through-hole; an EEG electrode member that is held on the support via the elastic member; and a holding member that passes through the first through-hole and has one end that holds the EEG electrode member and the other end that is exposed to the outside of the support. 2. The electroencephalogram measuring device described in 1., wherein the holding member is detachable from the EEG electrode member. 3. The electroencephalogram measuring device described in 1. or 2., wherein the angle of the holding member relative to the support is variable when the holding member holds the EEG electrode member. 4. The electroencephalogram measuring device described in any one of 1. to 3., wherein the elastic member is made of an elastic material. 5. The electroencephalogram measuring device described in 4., wherein the elastic member is made of one or more selected from urethane sponge, polyethylene sponge, polypropylene sponge, and silicone rubber sponge. 6. 4. 7. The electroencephalogram measuring device according to any one of 1. to 6., wherein the hardness of the elastic material measured by JIS K 6400-2・A method is 30N or more and 200N or less. 7. The electroencephalogram measuring device according to any one of 1. to 6., wherein the area of ​​the surface of the elastic member facing the head is 3 cm ２ 25cm or more ２ An electroencephalogram measuring device as set forth in any one of 8. to 7., wherein the thickness of the elastic member in a direction perpendicular to the surface of the elastic member facing the head is 10 mm or more and 100 mm or less when the support body is not attached to the head. 9. An electroencephalogram measuring device as set forth in any one of 8. to 10., wherein the support body comprises a base positioned on the head side and a covering member positioned on the opposite side from the head side when attached to the head, the holding member holds the electroencephalogram electrode member while passing through a second through-hole and the first through-hole provided in the covering member, and the diameter of the second through-hole is larger than the diameter of the first through-hole.

[0009] According to the present invention, an electroencephalogram measuring device can be provided that can bring the electroencephalogram electrodes into stable contact with the scalp.

[0010] 11 is a diagram illustrating a partial cross section of an electroencephalogram measuring device according to an embodiment. FIG. 12 is a perspective view illustrating an electroencephalogram measuring device according to an embodiment. FIG. 13 is a perspective view illustrating an electroencephalogram measuring device according to an embodiment. FIG. 14 is a diagram illustrating a state in which a support is attached to a person's head. FIG. 15 is a diagram illustrating an example of the state of the inside of the support. FIG. 16 is a diagram illustrating a state in which the support is pressed against the scalp of the head. FIG. 17 is a diagram illustrating a method of moving the holding member. FIG. 18 is a diagram illustrating a state in which a tube is attached to the support. A cross-sectional view illustrating an electroencephalogram electrode member and its surroundings during measurement. FIG. 19 is a diagram illustrating a partial cross section of an electroencephalogram measuring device in a state in which the holding member and the electroencephalogram electrode member have been removed from the support. A diagram illustrating the structure of the side of the electroencephalogram electrode member that faces the head. A side view of the electroencephalogram electrode member. A cross-sectional view taken along the A-A line in FIG. 11. A diagram illustrating the relationship between the convex portion and the tube.

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, like components are designated by like reference numerals, and the description thereof will be omitted as appropriate.

[0012] 1 is a diagram illustrating a partial cross section of an EEG measurement device 10 according to an embodiment. The EEG measurement device 10 includes a support 110 and an EEG electrode member 120. The support 110 can be worn on the head. The EEG electrode member 120 is held by the support 110.

[0013] Brain waves can be measured by bringing the EEG electrode member 120 of the EEG measuring device 10 into contact with the head.

[0014] 2 and 3 are perspective views illustrating the EEG measuring device 10 according to this embodiment. FIG. 4 is a diagram illustrating a state in which the support 110 is attached to a person's head 20. FIG. 5 is a diagram illustrating a state of the inside of the support 110 (the side into which the head 20 is inserted). In the examples of FIGS. 2 to 5, the support 110 is helmet-shaped. When the support 110 is helmet-shaped, the support 110 has a recess into which the head 20 is inserted. The EEG measuring device 10 is configured so that one or more EEG electrode members 120 come into contact with the head 20 when the helmet-shaped support 110 is attached to the head 20. The EEG measuring device 10 may include a belt 170 for fixing the support 110 to the head 20, as shown in FIG. 5.

[0015] Hereinafter, the side of the support 110 facing the head 20 will be referred to as the inside of the support 110, and the side opposite the inside will be referred to as the outside of the support 110. In FIG. 1 , the direction from the inside to the outside of the support 110 is referred to as the z direction. The x direction, y direction, and z direction are perpendicular to each other. The z direction is generally the normal direction of the scalp 22. Note that the x direction, y direction, and z direction can be defined as different directions for each EEG electrode member 120 in the EEG measurement device 10.

[0016] The holding member 140, which will be described in detail later, may be detachable from the support body 110. Fig. 2 shows a state in which the holding member 140 is attached to the support body 110, and Figs. 3 and 4 show a state in which the holding member 140 has been removed from the support body 110.

[0017] In the examples of Figures 2 to 5, the support 110 holds a plurality of EEG electrode members 120. With the support 110 attached to the head 20, each EEG electrode member 120 can be brought into contact with a predetermined position on the head 20. EEG signals are then measured using the plurality of EEG electrode members 120. For example, the support 110 can hold seven EEG electrode members 120. The positions of the seven EEG electrode members 120 may correspond to positions F3, F4, C3, C4, P3, Pz, and P4 in the International 10-20 electrode placement system. The number and positions of the EEG electrode members 120 provided on the support 110 are not particularly limited and can be set according to the application, etc.

[0018] In the example of Fig. 1, the EEG electrode member 120 is provided with a third through-hole 121. The third through-hole 121 is a hole for supplying a liquid to the head 20. Providing the third through-hole 121 in the EEG electrode member 120 makes it easy to inject a liquid into the scalp. For example, if an auxiliary liquid containing an electrolyte is supplied to the head 20 prior to measuring EEGs, it is possible to improve the electrical contact between the scalp and the EEG electrode member 120. The EEG electrode member 120 and a method for measuring EEGs will be described in detail below.

[0019] 1 , the EEG measuring device 10 further includes an elastic member 130 and a holding member 140. The elastic member 130 is elastically deformable. A first through-hole 131 is provided in the elastic member 130. The holding member 140 passes through the first through-hole 131, with one end 141 holding the EEG electrode member 120 and the other end 142 exposed to the outside of the support body 110. The EEG electrode member 120 is held by the support body 110 via the elastic member 130.

[0020] The shape of the support 110 is determined based on, for example, an average head shape. However, head shapes vary greatly from person to person, and an element that can absorb these differences is necessary. In an EEG measurement device 10 in which the EEG electrode member 120 is held on the support 110 via an elastic member 130, the elastic member 130 elastically deforms when the support 110 is attached to the head 20. This allows the EEG electrode member 120 to be in stable contact with the scalp, allowing EEG measurement, even if there are individual differences in head shape (irregularities and surface angles).

[0021] Furthermore, since the EEG measuring device 10 has both the elastic member 130 and the holding member 140, the EEG electrode member 120 can be moved using the holding member 140. In other words, the EEG electrode member 120 can be used to part the hair, allowing the EEG electrode to stably contact the scalp.

[0022] In one example of the EEG measurement device 10, the holding member 140 is detachable from the EEG electrode member 120. This eliminates any protrusions from the support 110 during measurement, and stabilizes the center of gravity when attached to the head 20. In addition, the subject can lie down while wearing the support 110, reducing noise caused by body movement and the like. EEG measurement may also be performed while the subject is moving around.

[0023] Furthermore, the EEG electrode member 120 is detachable from the support 110. This allows the EEG electrode member 120 to be replaced as needed, or different types of EEG electrode member 120 to be used for different measurements.

[0024] The method of using the EEG measuring device 10 will be described below. First, as shown in Fig. 1, the support 110, to which the EEG electrode members 120 and the holding member 140 are attached, is attached to the head 20. However, the holding member 140 may be attached to the EEG electrode members 120 after the support 110 is attached to the head 20.

[0025] FIG. 6 is a diagram illustrating a state in which the support 110 is pressed against the scalp 22 of the head 20. FIG. 6 is a partial cross-sectional view of the EEG measuring device 10. The cross-section shown in FIG. 6 corresponds to the cross-section shown in FIG. 1. When the support 110 is pressed against the scalp 22 of the head 20, the elastic member 130 is contracted compared to before pressing. When the support 110 is attached to the head 20, the EEG electrode member 120 comes into contact with the scalp 22. The elastic member 130 then deforms depending on the position and angle of the scalp 22 relative to the support 110. Furthermore, the EEG electrode member 120 is pressed against the scalp 22 with a force corresponding to the elasticity of the elastic member 130. In other words, contraction of the elastic member 130 allows the position and angle of the tip of the EEG electrode member 120 relative to the support 110 to change to fit the shape of the head 20.

[0026] FIG. 7 is a diagram illustrating an example of how to move the holding member 140. FIG. 7 is a partial cross-sectional view of the EEG measurement device 10. The cross-section shown in FIG. 7 corresponds to the cross-section shown in FIG. 1. When the holding member 140 holds the EEG electrode member 120, the angle of the holding member 140 with respect to the support body 110 is variable. Furthermore, the length of the portion of the holding member 140 that is exposed to the outside from the support body 110 is variable depending on the degree of contraction of the elastic member 130. After attaching the support body 110 to the head 20, for example, the operator of the EEG measurement device 10 moves the holding member 140 using the support body 110 as a reference.

[0027] Specifically, the operator can move the holding member 140 so as to change the angle of the holding member 140 relative to the support 110, i.e., the angle relative to the head 20. It is particularly effective to move the holding member 140 so as to rotate the other end 142 of the holding member 140 around the EEG electrode member 120 as a fulcrum. The operator can also push and pull the holding member 140 relative to the support 110, i.e., the head 20. These movements of the holding member 140 can part the hair on the scalp 22, improving the contact between the EEG electrode member 120 and the scalp 22.

[0028] Next, the operator attaches the tube to the support 110. The EEG measurement device 10 according to this embodiment further includes a tube that passes through a third through-hole 121 provided in the EEG electrode member 120. The tube is insertable into and removable from the third through-hole 121 of the EEG electrode member 120.

[0029] Fig. 8 is a diagram illustrating a state in which a tube 151 is attached to the support body 110. Fig. 8 is a partial cross-sectional view of the EEG measurement device 10. The cross-section shown in Fig. 8 corresponds to the cross-section shown in Fig. 1. Fig. 6 can also be said to show the support body 110 in a state in which the tube 151 has been removed. In the example of Fig. 8, the EEG measurement device 10 further includes an injection member 152 for injecting a liquid 30 into the tube 151. In the example of Fig. 8, the EEG measurement device 10 further includes a connecting member 153. The connecting member 153 is a connecting member for connecting the tube 151 to the injection member 152.

[0030] When the operator attaches the tube 151 to the support 110, the operator injects auxiliary liquid into the tube 151 to supply the auxiliary liquid to the scalp 22 and wet the scalp 22 as illustrated in Fig. 8. The auxiliary liquid is an example of the liquid 30. The auxiliary liquid is not particularly limited as long as it can reduce the electrical resistance between the EEG electrode member 120 and the scalp 22, and includes, for example, an electrolyte. However, it is also possible to perform EEG measurement using the EEG measurement device 10 without supplying auxiliary liquid.

[0031] Next, the operator removes the holding member 140 from the support 110 and starts electroencephalogram measurement.

[0032] According to this embodiment, the EEG measuring device 10 includes the EEG electrode member 120 having the third through-hole 121, and the tube 151 passing through the third through-hole 121. Therefore, auxiliary liquid can be efficiently supplied to the area where the EEG electrode member 120 and the scalp 22 come into contact with each other.

[0033] Furthermore, after the EEG electrode member 120 is brought into contact with the scalp 22, the auxiliary liquid can be supplied immediately before measurement. Therefore, a low-viscosity liquid can be used as the auxiliary liquid. For example, if the auxiliary liquid is applied before placing the EEG electrode member on the head, there is a risk that the auxiliary liquid will run off or evaporate before measurement begins, necessitating the use of a paste or gel-like auxiliary liquid. When using a paste-like auxiliary liquid, the extremely high viscosity of the auxiliary liquid necessitates the laborious manual application of the auxiliary liquid, which requires parting the hair. Furthermore, when using a gel-like auxiliary liquid, the hair can interfere with its ability to reach the scalp, and excessive application can lead to dripping and short-circuiting between the electrodes. On the other hand, these concerns are eliminated when the auxiliary liquid can be supplied immediately before measurement. With the EEG measurement device 10 according to this embodiment, the holding member 140 can be manipulated in advance to part the hair and inject a small amount of auxiliary liquid close to the scalp. Furthermore, using an auxiliary liquid with a low viscosity equivalent to that of water is even less susceptible to hair interference, significantly reducing contact resistance with a small amount of liquid.

[0034] Fig. 9 is a cross-sectional view illustrating the state of the EEG electrode member 120 and its surroundings during measurement. The cross-section shown in Fig. 9 corresponds to the cross-section shown in Fig. 1. EEG measurement can be performed with the tube 151 and the holding member 140 removed from the support 110.

[0035] Each component of the electroencephalogram measuring device 10 will be described in detail below.

[0036] The support body 110 has a shape that can cover at least a part of the head 20. In this embodiment, the support body 110 includes a base body 111 and a covering member 112. The base body 111 is located on the head 20 side when the support body 110 is attached to the head 20. The covering member 112 is located on the opposite side from the head 20 side when the support body 110 is attached to the head 20.

[0037] The base 111 is made of, for example, polystyrene foam. The covering member 112 is made of, for example, resin. The covering member 112 is harder than the base 111 and can protect the head 20. However, the support body 110 does not necessarily have to include the covering member 112.

[0038] However, the support 110 may be made of, for example, cloth or rubber, as long as it can be attached to the head 20. The support 110 may be, for example, in the shape of a helmet, a hat, or a band.

[0039] FIG. 10 is a diagram illustrating a partial cross section of the EEG measuring device 10 with the holding member 140 and the EEG electrode member 120 removed from the support 110. The cross section shown in FIG. 10 corresponds to the cross section shown in FIG. 1. Wiring 163, circuit 162, and wiring 165, which will be described later, are not depicted in FIG. 10. The elastic member 130 is housed in a hole provided in the support 110. The outer shape and size of the elastic member 130 approximately match the inner shape and size of the hole provided in the support 110, and the elastic member 130 is fitted into the hole in the support 110. When the support 110 is not attached to the head 20, the elastic member 130 may fill the entire hole provided in the support 110 except for the first through-hole 131. Furthermore, as shown in FIG. 10, a portion of the elastic member 130 may protrude from the hole in the support 110. A second through-hole 114 is provided in the covering member 112. The first through-hole 131 provided in the elastic member 130 and the second through-hole 114 provided in the covering member 112 are in communication with each other. For example, as shown in FIG. 1 , the holding member 140 holds the EEG electrode member 120 in a state where it passes through the first through-hole 131 and the second through-hole 114.

[0040] Here, it is preferable that the hole diameter d2 of the second through hole 114 is larger than the hole diameter d1 of the first through hole 131. By making the hole diameter d2 of the second through hole 114 larger in this manner, the holding member 140 can be tilted significantly with respect to the support body 110.

[0041] The elastic member 130 is made of an elastic material, such as one or more selected from the group consisting of urethane sponge, polyethylene sponge, polypropylene sponge, and silicone rubber sponge. The elastic material may be a foam, and examples of the foam include low-resilience sponge and low-resilience elastic foam.

[0042] The elastic member 130 may be configured without a spring. When a spring is used, the repulsive force of the spring increases in proportion to the deformation of the spring. Therefore, when the deformation is large, excessive repulsive force is generated, making the subject more likely to feel pain. On the other hand, when a foam elastic material is used, there is a range of displacement in which the repulsive force does not increase significantly (is not proportional) with an increase in the deformation. By configuring the elastic member 130 to be usable within this range of displacement, an appropriate repulsive force can be obtained even if the deformation varies depending on the position of the EEG electrode member 120.

[0043] The hardness H of the elastic material, as measured by JIS K 6400-2・A method, is, for example, 30 N or more and 200 N or less. From the viewpoint of further reducing the burden on the subject, the hardness H is preferably 100 N or less. Furthermore, from the viewpoint of more stably pressing the EEG electrode member 120 against the scalp 22, the hardness H is preferably 50 N or more.

[0044] The thickness t of the elastic member 130 is, for example, 10 mm or more and 100 mm or less when the support 110 is not attached to the head 20. Here, the thickness t is the thickness of the elastic member 130 in a direction perpendicular to a surface 132 of the elastic member 130 that faces the head 20. The elastic member 130 is fixed to the support 110 at one end, and the thickness t of the elastic member 130 is variable depending on the force received in the thickness direction. Specifically, the elastic member 130 is fixed to the support 110 at a surface 133 opposite to the surface 132. The thickness t of the elastic member 130 is preferably 20 mm or more and 60 mm or less when the support 110 is not attached to the head 20.

[0045] The area of ​​the surface 132 of the elastic member 130 facing the head is, for example, 3 cm ２ 25cm or more ２ The shape of the surface 132 is not particularly limited. Examples of the shape of the surface 132 include a circle, a square, an egg, and an ellipse.

[0046] A conductive part 164 is fixed inside the first through-hole 131 of the elastic member 130. The conductive part 164 is made of, for example, metal. A through-hole is provided in the conductive part 164, and a screw groove is provided inside the through-hole for fixing the EEG electrode member 120.

[0047] Fig. 11 is a diagram (bottom view) illustrating the structure of the side of the EEG electrode member 120 that faces the head 20. Fig. 12 is a side view of the EEG electrode member 120. Fig. 13 is a cross-sectional view taken along line A-A in Fig. 11. The EEG electrode member 120 comprises a base 122 and one or more protrusions 123 provided on the base 122. A third through-hole 121 is provided in the base 122. In this embodiment, the EEG electrode member 120 further comprises a conductive member 124, wiring 127, and a cover 129.

[0048] The conductive member 124 is made of, for example, metal, and has a first portion 124a and a second portion 124b. The first portion 124a and the second portion 124b are integrally formed.

[0049] The first portion 124a is tubular. The through-hole provided in the conductive member 124 and the through-hole provided in the base 122 are in communication with each other, and these through-holes form the third through-hole 121. A thread is provided on the outside of the first portion 124a.

[0050] 13, the cover 129 covers a part of the conductive member 124 and a part of the base 122. The cover 129 is made of, for example, a resin and is insulating. The base 122 is fixed to the main surface of the second portion 124b.

[0051] The convex portion 123 has a first portion 123a, a conductive portion 123b, and a second portion 123c. A plurality of convex portions 123 are provided on the surface of the base 122 opposite the conductive member 124 side. The base 122 and the first portion 123a are integrally formed using a rubber-like elastic body. Ten or more convex portions 123 may be provided. The first portion 123a may have a shape such as a cone or a polygonal pyramid. The conductive portion 123b is provided so as to cover the first portion 123a. The tip of the first portion 123a is covered with the second portion 123c. The second portion 123c is a spherical member made of a gel-like material (also known as hydrogel) containing water inside, and is attached so as to pierce the tip of the first portion 123a.

[0052] When the EEG electrode member 120 is pressed against the head 20 to measure EEG, the second portion 123c comes into contact with the head 20. At this time, electrolytes (generally salt) from the scalp 22 are absorbed into the second portion 123c. As a result, the EEG electrode member 120 and the scalp 22 are electrically connected. The shape of the second portion 123c is not limited to a sphere. The gel material constituting the second portion 123c is not particularly limited as long as it is capable of sufficient water absorption and has sufficient strength and flexibility when pressed against the head 20; for example, an acrylic hydrogel or a silicone hydrogel can be used.

[0053] The materials of the base 122 and the first portion 123a will be described. The base 122 and the first portion 123a are configured to have a rubber-like elastic body. Specific examples of the rubber-like elastic body include rubber and thermoplastic elastomer (also simply referred to as "elastomer (TPE)"). Examples of rubber include silicone rubber. Examples of thermoplastic elastomers include styrene-based TPE (TPS), olefin-based TPE (TPO), vinyl chloride-based TPE (TPVC), urethane-based TPE (TPU), ester-based TPE (TPEE), and amide-based TPE (TPAE).

[0054] The conductive portion 123b is formed using, for example, a paste containing a highly conductive metal, such as copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, or an alloy thereof.

[0055] Wiring 127 connected to conductive portion 123b is provided inside first portion 123a. Wiring 127 electrically connects conductive portion 123b and conductive member 124. Wiring 127 may be made of, for example, conductive fiber. The conductive fiber may be one or more types selected from the group consisting of metal fiber, metal-coated fiber, carbon fiber, conductive polymer fiber, conductive polymer-coated fiber, and conductive paste-coated fiber. These may be used alone or in combination of two or more types.

[0056] The holding member 140 and the tube 151 will be described with reference to Figure 8. In this embodiment, the holding member 140 has a generally rod-like outer shape. A through-hole is provided on the inside of the holding member 140. The through-hole of the holding member 140 connects the inside and outside of the support body 110 when the holding member 140 is attached to the support body 110.

[0057] The EEG electrode member 120 is attached to the conductive portion 164 (i.e., attached to the elastic member 130) by screwing the first portion 124a of the conductive member 124 into the conductive portion 164. With the EEG electrode member 120 attached to the conductive portion 164, the first portion 124a penetrates the conductive portion 164, with the tip of the first portion 124a protruding outside the conductive portion 164. A thread groove is provided on the inside of one end 141 of the holding member 140. The holding member 140 can hold the EEG electrode member 120 by screwing the thread groove of the one end 141 of the holding member 140 into the portion of the first portion 124a protruding from the conductive portion 164. The operator can attach and detach the holding member 140 to and from the EEG electrode member 120 by holding the other end 142 of the holding member 140 and rotating the holding member 140 around the z-axis.

[0058] The other end 142 of holding member 140 is provided with a connection portion for attaching injection member 152. The connection portion is part of the through-hole of holding member 140 and is configured so that connecting member 153 can be fitted into it. Injection member 152 is, for example, a syringe and has a liquid-containing portion. Tube 151 is, for example, made of metal. With connecting member 153 and tube 151 attached to injection member 152, tube 151 is inserted into third through-hole 121, and connecting member 153 is fitted into the connection portion of holding member 140. In this way, with tube 151 inserted into the through-hole of holding member 140 and third through-hole 121 of EEG electrode member 120, injection member 152 and tube 151 are fixed to holding member 140 via connecting member 153.

[0059] With the tube 151 inserted into the third through-hole 121 of the EEG electrode member 120, the tube 151 penetrates the base 122. The liquid pushed out from the injection member 152 is supplied to the scalp 22 through the tube 151.

[0060] 14 is a diagram illustrating the relationship between the convex portion 123 and the tube 151. When the tube 151 is inserted into the third through-hole 121 of the EEG electrode member 120, the protruding height h1 of the tube 151 from the base 122 is smaller than the protruding height h2 of the convex portion 123 from the base 122. This prevents the tip of the tube 151 from touching the scalp 22 and causing injury.

[0061] 3, 5, 9, and 13, the electrical connections in the EEG measuring device 10 will be described below. The EEG measuring device 10 further includes wiring 163, a circuit 162, wiring 165, a signal processing unit 160, and a reference potential measuring wiring 161. Of these, the conductive portion 164, wiring 163, circuit 162, and wiring 165 are provided for each EEG electrode member 120. The wiring 163 and circuit 162 are fixed to the elastic member 130 together with the conductive portion 164.

[0062] When the scalp 22 contacts the second portion 123c, an electrical signal from the scalp 22 is transmitted to the conductive member 124 via the second portion 123c, the conductive portion 123b, and the wiring 127. The electrical signals obtained from each EEG electrode 120 are sent from the conductive member 124 of the EEG electrode 120 to the signal processing unit 160 via the conductive portion 164, the wiring 163, the circuit 162, and the wiring 165. The circuit 162 includes, for example, a preamplifier that amplifies the electrical signals from the EEG electrode 120. The signal processing unit 160 acquires electrical signals from the multiple EEG electrode 120 (via the circuit 162). The signal processing unit 160 performs processing such as amplification of the EEG electrical signals, analog-to-digital conversion, and frequency filtering. The signal processing unit 160 can record the EEG signal data obtained by these processes in a recording unit provided within the signal processing unit 160. The signal processing unit 160 can also transmit EEG signal data to an external device via wired or wireless communication. The signal processing unit 160 is implemented, for example, using an integrated circuit. The signal processing unit 160 preferably has a built-in battery. This eliminates the need to connect a power line to the signal processing unit 160 for power supply. Ultimately, the subject can move and be active to a certain degree during measurement. It also prevents noise dependent on the power supply frequency. The reference potential measurement wiring 161 connects the signal processing unit 160 to a reference electrode (not shown). The reference electrode is an electrode used to obtain a reference potential that serves as a reference for measuring EEG signals. The reference electrode is attached, for example, with a clip to the earlobe or the top of the outer ear, or attached to the bone on the back side of the outer ear, to obtain a reference potential.

[0063] Next, the operation and effects of this embodiment will be described. According to this embodiment, the EEG measuring device 10 includes a support 110, an elastic member 130, an EEG electrode member 120, and a holding member 140. The support 110 is attachable to the head 20. The elastic member 130 is elastically deformable and has a first through-hole 131. The EEG electrode member 120 is held on the support 110 via the elastic member 130. The holding member 140 passes through the first through-hole 131, with one end 141 holding the EEG electrode member 120 and the other end 142 exposed to the outside of the support 110. This allows hair to be parted and the EEG electrode to be in stable contact with the scalp.

[0064] Although the embodiments of the present invention have been described above with reference to the drawings, these are merely examples of the present invention, and various other configurations can also be adopted.

[0065] This application claims priority based on Japanese Patent Application No. 2023-104863, filed on June 27, 2023, the disclosure of which is incorporated herein by reference in its entirety.

[0066] REFERENCE SIGNS LIST 10 EEG measuring device 20 Head 22 Scalp 110 Support 111 Base 112 Covering member 114 Second through-hole 120 EEG electrode member 121 Third through-hole 122 Base 123 Convex portion 124 Conductive member 127 Wiring 129 Cover 130 Elastic member 131 First through-hole 140 Holding member 151 Tube 152 Injection member 153 Connection member 160 Signal processing unit 161 Reference potential measurement wiring 162 Circuit 163, 165 Wiring 164 Conductive portion 170 Belt

Claims

1. A support that can be worn on the head, An elastic member that is elastically deformable and has a first through hole, An electroencephalogram electrode member held in the support via the elastic member, The support comprises a holding member that passes through the first through-hole, with one end holding the electroencephalogram electrode member and the other end exposed to the outside of the support. Electroencephalogram (EEG) measuring device.

2. In the electroencephalogram measuring device according to claim 1, The holding member is detachable from the electroencephalogram electrode member. Electroencephalogram (EEG) measuring device.

3. In the electroencephalogram measuring device according to claim 1 or 2, While the holding member is holding the electroencephalogram electrode member, the angle of the holding member with respect to the support is variable. Electroencephalogram (EEG) measuring device.

4. In the electroencephalogram measuring device according to claim 1 or 2, The aforementioned elastic member is made of an elastic material. Electroencephalogram (EEG) measuring device.

5. In the electroencephalogram measuring device according to claim 4, The elastic member consists of one or more materials selected from urethane sponge, polyethylene sponge, polypropylene sponge, and silicone rubber sponge. Electroencephalogram (EEG) measuring device.

6. In the electroencephalogram measuring device according to claim 4, The hardness of the aforementioned elastic material, as measured by JIS K 6400-2-A method, is between 30 N and 200 N. Electroencephalogram (EEG) measuring device.

7. In the electroencephalogram measuring device according to claim 1 or 2, The area of ​​the surface of the elastic member that faces the head is 3 cm². ２ 25cm or more ２ The following is Electroencephalogram (EEG) measuring device.

8. In the electroencephalogram measuring device according to claim 1 or 2, The thickness of the elastic member in the direction perpendicular to the surface of the elastic member facing the head is 10 mm or more and 100 mm or less when the support is not attached to the head. Electroencephalogram (EEG) measuring device.

9. In the electroencephalogram measuring device according to claim 1 or 2, The support, when attached to the head, comprises a base located on the head side and a covering member located on the opposite side from the head side. The holding member holds the electroencephalogram electrode member while passing through the second through-hole and the first through-hole provided in the covering member. The diameter of the second through-hole is larger than the diameter of the first through-hole. Electroencephalogram (EEG) measuring device.