WO2021124795A1 - Électrode et système de détection d'ondes cérébrales - Google Patents

Électrode et système de détection d'ondes cérébrales Download PDF

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Publication number
WO2021124795A1
WO2021124795A1 PCT/JP2020/043373 JP2020043373W WO2021124795A1 WO 2021124795 A1 WO2021124795 A1 WO 2021124795A1 JP 2020043373 W JP2020043373 W JP 2020043373W WO 2021124795 A1 WO2021124795 A1 WO 2021124795A1
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Prior art keywords
group
detection electrode
electroencephalogram detection
electrode
protrusions
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PCT/JP2020/043373
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English (en)
Japanese (ja)
Inventor
雄眞 北添
八木澤　隆
拓弥 原田
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住友ベークライト株式会社
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Priority to JP2021515061A priority Critical patent/JP6923107B1/ja
Publication of WO2021124795A1 publication Critical patent/WO2021124795A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/251—Means for maintaining electrode contact with the body
    • A61B5/256—Wearable electrodes, e.g. having straps or bands
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/369—Electroencephalography [EEG]

Definitions

  • the present invention relates to an electroencephalogram detection electrode and an electroencephalogram detection system.
  • Patent Document 1 Various developments have been made so far in electrodes for EEG detection. As a technique of this kind, for example, the technique described in Patent Document 1 is known.
  • the electroencephalogram detection electrode disclosed in Patent Document 1 has a comb tooth row in which a plurality of conductive comb teeth are arranged, and is divided between the hairs of the subject to reach the scalp.
  • the present invention has been made in view of such a situation, and provides an electroencephalogram detection electrode that can be worn regardless of the shape of the wearer's head and an electroencephalogram detection system including such an electroencephalogram detection electrode. With the goal.
  • a rubber-like elastic band member that is attached following the shape of a human head and On one surface of the band member, a plurality of elastic body protrusions provided integrally with the band member, Have, At least the tip of the protrusion constitutes an electrode made of a conductive member.
  • An electrode for detecting an electroencephalogram can be provided.
  • an electroencephalogram detection system including the electroencephalogram detection electrode is provided.
  • an electroencephalogram detection electrode that can be worn regardless of the shape of the wearer's head and an electroencephalogram detection system including such an electroencephalogram detection electrode.
  • FIG. 4 It is a figure which shows another example of the X2-X2 cross-sectional view of FIG. 4 which concerns on 1st Embodiment. It is a top view of the electrode for electroencephalogram detection which concerns on 2nd Embodiment. It is a top view of the electrode for electroencephalogram detection which concerns on 3rd Embodiment. It is a top view of the electrode for electroencephalogram detection which concerns on 4th Embodiment. It is a top view of the electrode for electroencephalogram detection which concerns on 5th Embodiment. It is a top view of the electrode for electroencephalogram detection which concerns on 6th Embodiment. It is a top view of the electrode for electroencephalogram detection which concerns on 7th Embodiment.
  • FIG. 1 is a schematic view showing an electroencephalogram detection system 1 in a state where an electroencephalogram detection electrode 10 is attached to a human head 99.
  • FIG. 2 is a schematic view showing an electroencephalogram detecting electrode 10 in a state of being removed from the head.
  • the electroencephalogram detection system 1 includes an electroencephalogram detection electrode 10 and an electroencephalogram display device 20.
  • the electroencephalogram detection electrode 10 is attached to the human head 99, detects the electroencephalogram as a potential fluctuation from the living body, and outputs the detected electroencephalogram to the electroencephalogram display device 20.
  • the electroencephalogram display device 20 acquires the electroencephalogram detected by the electroencephalogram detection electrode 10 and displays it on a monitor, saves data, and performs a well-known electroencephalogram analysis process (measurement process).
  • the electroencephalogram detection electrode 10 is formed on a rubber-like elastic band member 11 that follows the shape of the human head 99 and a band on one surface of the band member 11. It has a plurality of elastic body protrusions 12 provided integrally with the member 11. At least the tip of the protrusion 12 constitutes an electrode 13 made of a conductive member.
  • the electroencephalogram detection electrode 10 includes a connector, electronic components, and the like, and is connected to the electroencephalogram display device 20.
  • the electroencephalogram detection electrode 10 and the electroencephalogram display device 20 may be integrally configured.
  • the electroencephalogram display device 20 may be composed of a smart device (smart phone, tablet terminal) and a predetermined application that functions on the smart device (smart phone, tablet terminal). In this case, the electroencephalogram detection electrode 10 has a communication function of wirelessly transmitting the detected electroencephalogram.
  • the electroencephalogram display device 20 has, for example, a control unit, a storage unit, a user IF, an output unit, and an electroencephalogram processing data processing unit. These include arithmetic devices such as CPUs, memories such as ROMs and RAMs, storage devices such as HDDs and SSDs, monitors, communication IFs, etc., and brain waves acquired from the brain wave detection electrode 10 can be used by a predetermined program. Converts to various data formats and performs well-known brain wave analysis functions.
  • FIG. 3 is a front view of the electroencephalogram detection electrode 10.
  • FIG. 4 is a plan view of the electroencephalogram detection electrode 10.
  • the band member 11 that was curved in FIGS. 1 and 2 is shown in a flat state.
  • the thickness direction of the band member 11 is the Z direction (+ Z in the upward direction)
  • the longitudinal direction of the rectangular shape is the X direction (+ X in the right direction
  • the lateral direction is the Y direction.
  • the back direction is + Y).
  • the back side (+ Y side) will be described as the front side
  • the front side (-Y side) will be described as the rear side.
  • the band member 11 of the electroencephalogram detection electrode 10 is a plate-like body having a predetermined thickness t. Specifically, the band member 11 exhibits a band-shaped rectangular shape in a top view (plan view).
  • the thickness t of the band member 11 is, for example, 0.1 mm to 30 mm.
  • the length L1 of the rectangular shape in the longitudinal direction is, for example, 20 cm to 65 cm.
  • the length L2 of the rectangular shape in the lateral direction is, for example, 0.5 cm to 5 cm.
  • the shape of the band member 11 is not limited to a strip-shaped rectangular shape. For example, it may be an elongated elliptical shape instead of a rectangular shape.
  • the thickness t of the band member 11 is not limited to a constant value, and a part of the thickness t may be thinned or thickened. In any case, the band member 11 follows the shape of the head 99 when the electroencephalogram detection electrode 10 is attached to the head 99.
  • a plurality of protrusions 12 are provided on one surface of the band member 11 integrally with the band member 11.
  • the plurality of protrusions 12 are provided side by side in a row at a predetermined pitch P in a top view.
  • the pitch P of the protrusion 12 (that is, the electrode 13) is, for example, 1 mm to 20 mm.
  • the pitch P is determined from the viewpoint of the number of electrodes 13 required for detecting brain waves and the followability of the band member 11 to the head 99.
  • FIG. 5 and 6 show views of the protrusion 12 as viewed from the front side (rear side).
  • FIG. 5 is an enlarged view of a region X1 in the front view of FIG. 3 showing one protrusion 12.
  • FIG. 6 is a cross-sectional view of X2-X2 of FIG. 4, and is also a cross-sectional view of the protrusion 12 of FIG.
  • the protrusion 12 is integrally formed with the band member 11 so as to project from one surface of the band member 11 (here, the band inner surface 11a).
  • the height h1 of the protrusion 12 of the triangular pyramid is, for example, 0.5 mm to 20 mm, preferably 3 mm to 15 mm, and more preferably 4 mm to 10 mm.
  • the shape of the bottom surface of the triangular pyramid is an isosceles triangle whose apex is an acute angle.
  • the apex of the isosceles triangle is on one side of the rectangular shape in the lateral direction (front side (+ Y side) in the figure), and the base is on the other side (rear side ( ⁇ Y side) in the figure).
  • the apex of the triangular pyramid is located at the center of gravity of the isosceles triangle in the illustrated example in a top view.
  • the protrusion 12 is provided in a direction in which the front side (+ Y side) is a gentle side and the rear side ( ⁇ Y side) is a steep surface in the drawing.
  • the "direction of the protrusion 12" means the above-mentioned “direction in which the apex of the isosceles triangle is facing”.
  • the protrusion 12 is applied to the head 99 from the gentle side (+ Y side) without causing discomfort (pain, etc.) to the subject, and also. There is little resistance from the hair and it can be smoothly attached to the electroencephalogram detection electrode 10.
  • an electrode 13 made of a conductive member is provided so as to cover the surface of the protrusion 12.
  • the electrode 13 is provided on the surface in the range of a predetermined height h2 from the apex of the triangular pyramid of the protrusion 12.
  • the predetermined height h2 on which the electrode 13 is formed is, for example, 1 mm to 10 mm, although it depends on the height h1 of the protrusion 12.
  • the conductive member of the electrode 13 is, for example, a paste containing a good conductive metal.
  • Good conductive metals include one or more selected from the group consisting of copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, or alloys thereof.
  • silver, silver chloride, and copper are preferable from the viewpoint of availability and conductivity.
  • the electrode 13 is formed of a paste containing a good conductive metal
  • the top of the protrusion 12 made of a rubber-like elastic body is dipped (immersed and coated) in a paste-like conductive solution containing a good conductive metal. ..
  • the electrode 13 is formed on the surface of the tip portion of the protrusion 12.
  • the electrode 13 as a conductive resin layer may be formed by applying a conductive solution containing a conductive filler and a solvent to the tip portion of the protrusion 12. At this time, by using a material (silicone rubber) of the same system as the protrusion 12, the adhesion of the electrode 13 (conductive resin layer) can be enhanced.
  • a conductive signal line 14 connected to the electrode 13 is provided inside the protrusion 12.
  • the material, thickness, and arrangement position of the signal line 14 are not particularly limited as long as the connected brain wave display device 20 or the like can appropriately measure the brain wave.
  • the signal line 14 is on the inner surface of the electrode 13 (that is, the surface on the side in contact with the protrusion 12) at the top of the protrusion 12. Is connected.
  • the signal line 14 is electrically connected to the electrode 13 that covers the tip of the protrusion 12, and is arranged inside the protrusion 12 from the tip toward the band member 11.
  • the signal line 14 may be made of a conductive fiber.
  • the conductive fiber one or more 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 can be used. These may be used alone or in combination of two or more.
  • the metal material of the metal fiber and the metal coating fiber is not limited as long as it has conductivity, but copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, stainless steel, aluminum, silver / chloride. Examples include silver and alloys thereof. These may be used alone or in combination of two or more. Among these, silver can be used from the viewpoint of conductivity. Further, it is preferable that the metal material does not contain a metal such as chromium that gives an environmental load.
  • the fiber material of the metal-coated fiber, the conductive polymer-coated fiber, and the conductive paste-coated fiber is not particularly limited, but may be any of synthetic fiber, semi-synthetic fiber, and natural fiber. Among these, it is preferable to use polyester, nylon, polyurethane, silk, cotton and the like. These may be used alone or in combination of two or more.
  • Examples of the carbon fibers include PAN-based carbon fibers and pitch-based carbon fibers.
  • the conductive polymer material of the conductive polymer fiber and the conductive polymer-coated fiber is, for example, a mixture of a conductive polymer and a binder resin such as polythiophene, polypyrrole, polyaniline, polyacetylene, polyphenylene vinylene, polynaphthalene, and derivatives thereof.
  • a conductive polymer such as PEDOT-PSS ((3,4-ethylenedioxythiophene) -poly (styrene sulfonic acid) is used.
  • the resin material contained in the conductive paste of the conductive paste-coated fiber is not particularly limited, but is preferably elastic, for example, silicone rubber, urethane rubber, fluororubber, nitrile rubber, acrylic rubber, styrene rubber, chloroprene rubber, and ethylene. It can contain one or more selected from the group consisting of propylene rubber. These may be used alone or in combination of two or more.
  • the conductive filler contained in the conductive paste of the conductive paste-coated fiber is not particularly limited, but a known conductive material may be used, but metal particles, metal fibers, metal-coated fibers, carbon black, acetylene black, graphite, carbon. It can include one or more selected from the group consisting of fibers, carbon nanotubes, conductive polymers, conductive polymer coated fibers and metal nanowires.
  • the metal constituting the conductive filler is not particularly limited, but is, for example, copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, silver / silver chloride, or at least one of these alloys. , Or two or more of these can be included. Among these, silver or copper is preferable because of its high conductivity and high availability.
  • the signal line 14 may be composed of a twisted yarn obtained by twisting a plurality of linear conductive fibers. Thereby, the disconnection of the signal line 14 at the time of deformation can be suppressed.
  • the coating on the conductive fiber does not only cover the outer surface of the fiber material, but in the case of a twisted yarn obtained by twisting single fibers, a metal or a conductive polymer is formed in the fiber gap in the twisted yarn. , Or, which is impregnated with a conductive paste and coats the single fibers constituting the plyed yarn one by one.
  • the tensile elongation at break of the signal line 14 is, for example, 1% or more and 50% or less, preferably 1.5% or more and 45%. By setting it within such a numerical range, it is possible to suppress excessive deformation of the protrusion 12 while suppressing breakage at the time of deformation.
  • the signal line 14 may adopt various arrangement structures as long as it conducts the inside of the protrusion 12.
  • the tip of the signal line 14 may have a structure that protrudes from the tip of the protrusion 12 or an inclined surface of the tip, a structure that is substantially on the same surface, or a structure that is buried. From the viewpoint of connection stability with the electrode 13, a protruding structure may be used.
  • the protruding portion at the tip of the signal line 14 is partially or wholly covered with the electrode 13.
  • the protruding structure at the tip of the signal line 14 a structure can be adopted in which there is no folding, there is folding, and the signal line 14 is wound around the surface of the tip of the protruding portion 12. Further, the signal line 14 does not coincide with the perpendicular line extending from the tip (apex) of the protrusion 12, and may be inclined with respect to the perpendicular line.
  • the signal line 14 is connected to the lower end (band member 11 side) of the electrode 13 and extends along the slope (surface) of the protrusion 12 to a predetermined position. It may be in the form of being drawn into the inside of the protrusion 12.
  • the end portion on the side connected to the electrode 13 and the end portion on the opposite side may be individually drawn out to the outside of the band member 11.
  • the plurality of signal lines 14 may be connected to a connector or the like provided on the band outer surface 11b of the band member 11 from the inside of the band member 11 and integrated.
  • the band member 11 and the protrusion 12 are rubber-like elastic bodies, and more specifically, rubber or a thermoplastic elastomer (also simply referred to as “elastomer (TPE)”).
  • rubber include silicone rubber.
  • the thermoplastic elastomer 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).
  • TPS styrene-based TPE
  • TPO olefin-based TPE
  • TPVC vinyl chloride-based TPE
  • TPU urethane-based TPE
  • TPEE ester-based TPE
  • TPAE amide-based TPE
  • the surface of the band member 11 is measured in accordance with JIS K 6253 (1997) at 37 ° C. ),
  • the hardness of the type A durometer is the rubber hardness A
  • the rubber hardness A is, for example, 15 or more and 55 or less.
  • the silicone rubber-based curable composition will be described.
  • the silicone rubber can be composed of a cured product of a silicone rubber-based curable composition.
  • the curing step of the silicone rubber-based curable resin composition is, for example, heating (primary curing) at 100 to 250 ° C. for 1 to 30 minutes and then post-baking (secondary curing) at 100 to 200 ° C. for 1 to 4 hours. It is done by.
  • the insulating silicone rubber is a silicone rubber that does not contain a conductive filler
  • the conductive silicone rubber is a silicone rubber that contains a conductive filler
  • the silicone rubber-based curable composition according to the present embodiment can contain a vinyl group-containing organopolysiloxane (A).
  • the vinyl group-containing organopolysiloxane (A) is a polymer that is the main component of the silicone rubber-based curable composition of the present embodiment.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same kind of vinyl group-containing linear organopolysiloxane.
  • the vinyl group-containing linear organopolysiloxane of the same type may contain at least the same vinyl group as the functional group and have a linearity, and the amount of vinyl group in the molecule, the molecular weight distribution, or the amount thereof added may be. It may be different.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may further contain different vinyl group-containing organopolysiloxanes.
  • the vinyl group-containing organopolysiloxane (A) can include a vinyl group-containing linear organopolysiloxane (A1) having a linear structure.
  • the vinyl group-containing linear organopolysiloxane (A1) has a linear structure and contains a vinyl group, and the vinyl group serves as a cross-linking point at the time of curing.
  • the content of the vinyl group of the vinyl group-containing linear organopolysiloxane (A1) is not particularly limited, but is preferably, for example, having two or more vinyl groups in the molecule and 15 mol% or less. , 0.01-12 mol%, more preferably.
  • the amount of vinyl groups in the vinyl group-containing linear organopolysiloxane (A1) is optimized, and a network with each component described later can be reliably formed.
  • "-" means that the numerical values at both ends thereof are included.
  • the vinyl group content is the mol% of the vinyl group-containing siloxane unit when all the units constituting the vinyl group-containing linear organopolysiloxane (A1) are 100 mol%. .. However, it is considered that there is one vinyl group for each vinyl group-containing siloxane unit.
  • the degree of polymerization of the vinyl group-containing linear organopolysiloxane (A1) is not particularly limited, but is preferably in the range of, for example, about 1000 to 10000, and more preferably about 2000 to 5000.
  • the degree of polymerization can be determined, for example, as the polystyrene-equivalent number average degree of polymerization (or number average molecular weight) in GPC (gel permeation chromatography) using chloroform as a developing solvent.
  • the specific gravity of the vinyl group-containing linear organopolysiloxane (A1) is not particularly limited, but is preferably in the range of about 0.9 to 1.1.
  • the obtained silicone rubber has heat resistance, flame retardancy, chemical stability, etc. Can be improved.
  • the vinyl group-containing linear organopolysiloxane (A1) preferably has a structure represented by the following formula (1).
  • R 1 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an alkenyl group, an aryl group, or a hydrocarbon group in which these are combined.
  • alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • alkenyl group having 1 to 10 carbon atoms include a vinyl group, an allyl group, a butenyl group and the like, and among them, a vinyl group is preferable.
  • the aryl group having 1 to 10 carbon atoms include a phenyl group and the like.
  • R 2 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an alkenyl group, an aryl group, or a hydrocarbon group in which these are combined.
  • alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • alkenyl group having 1 to 10 carbon atoms include a vinyl group, an allyl group, and a butenyl group.
  • the aryl group having 1 to 10 carbon atoms include a phenyl group.
  • R 3 is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, or a hydrocarbon group in which these are combined.
  • alkyl group having 1 to 8 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • aryl group having 1 to 8 carbon atoms include a phenyl group.
  • examples of the substituent of R 1 and R 2 in the formula (1) include a methyl group, a vinyl group and the like, and examples of the substituent of R 3 include a methyl group and the like.
  • a plurality of R 1 is independent from each other, may be different from each other, it may be the same.
  • R 2 and R 3 are independent from each other, it may be the same.
  • m and n are the number of repeating units constituting the vinyl group-containing linear organopolysiloxane (A1) represented by the formula (1), m is an integer of 0 to 2000, and n is 1000 to 10000. Is an integer of. m is preferably 0 to 1000, and n is preferably 2000 to 5000.
  • R 1 and R 2 are each independently a methyl group or a vinyl group, and at least one of them is a vinyl group.
  • the vinyl group-containing linear organopolysiloxane (A1) contains a first vinyl group having a vinyl group content of 2 or more in the molecule and 0.4 mol% or less. It contains a linear organopolysiloxane (A1-1) and a second vinyl group-containing linear organopolysiloxane (A1-2) having a vinyl group content of 0.5 to 15 mol%. It is preferable to have it.
  • raw rubber which is a raw material of silicone rubber, a first vinyl group-containing linear organopolysiloxane (A1-1) having a general vinyl group content and a second vinyl group-containing direct compound having a high vinyl group content.
  • the vinyl groups can be unevenly distributed, and the cross-linking density can be more effectively formed in the cross-linking network of the silicone rubber. As a result, the tear strength of the silicone rubber can be increased more effectively.
  • the vinyl group-containing linear organopolysiloxane (A1) for example, in the above formula (1-1), a unit in which R 1 is a vinyl group and / or a unit in which R 2 is a vinyl group is used.
  • the first vinyl group-containing linear organopolysiloxane (A1-1) preferably has a vinyl group content of 0.01 to 0.2 mol%.
  • the vinyl group-containing linear organopolysiloxane (A1-2) preferably has a vinyl group content of 0.8 to 12 mol%.
  • the ratio of and (A1-2) is not particularly limited, but for example, the weight ratio of (A1-1) :( A1-2) is preferably 50:50 to 95: 5, and 80:20 to 90: It is more preferably 10.
  • the first and second vinyl group-containing linear organopolysiloxanes (A1-1) and (A1-2) may be used alone or in combination of two or more. Good.
  • the vinyl group-containing organopolysiloxane (A) may contain a vinyl group-containing branched organopolysiloxane (A2) having a branched structure.
  • the silicone rubber-based curable composition of the present embodiment may contain a cross-linking agent.
  • the cross-linking agent can include organohydrogenpolysiloxane (B).
  • Organohydrogenpolysiloxane (B) is classified into linear organohydrogenpolysiloxane (B1) having a linear structure and branched organohydrogenpolysiloxane (B2) having a branched structure. Either one or both can be included.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same type of cross-linking agent.
  • the same type of cross-linking agent may have at least a common structure such as a linear structure or a branched structure, may contain a molecular weight distribution in the molecule or a different functional group, and the addition amount thereof is different. You may.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may further contain different cross-linking agents.
  • the linear organohydrogenpolysiloxane (B1) has a linear structure and a structure ( ⁇ Si—H) in which hydrogen is directly bonded to Si, and is a vinyl group-containing organopolysiloxane (A).
  • ⁇ Si—H a structure in which hydrogen is directly bonded to Si
  • A a vinyl group-containing organopolysiloxane
  • it is a polymer that undergoes a hydrosilylation reaction with the vinyl group of the component blended in the silicone rubber-based curable composition to crosslink these components.
  • the molecular weight of the linear organohydrogenpolysiloxane (B1) is not particularly limited, but for example, the weight average molecular weight is preferably 20000 or less, and more preferably 1000 or more and 10000 or less.
  • the weight average molecular weight of the linear organohydrogenpolysiloxane (B1) can be measured, for example, by polystyrene conversion in GPC (gel permeation chromatography) using chloroform as a developing solvent.
  • the linear organohydrogenpolysiloxane (B1) usually preferably has no vinyl group. As a result, it is possible to accurately prevent the cross-linking reaction from proceeding in the molecule of the linear organohydrogenpolysiloxane (B1).
  • linear organohydrogenpolysiloxane (B1) as described above for example, one having a structure represented by the following formula (2) is preferably used.
  • R 4 is a hydrocarbon group or a hydride group, in combination a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an alkenyl group, an aryl group, these.
  • alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • alkenyl group having 1 to 10 carbon atoms include a vinyl group, an allyl group, a butenyl group and the like.
  • the aryl group having 1 to 10 carbon atoms include a phenyl group.
  • R 5 is a hydrocarbon group or a hydride group, in combination a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an alkenyl group, an aryl group, these.
  • alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group and a propyl group, and among them, a methyl group is preferable.
  • alkenyl group having 1 to 10 carbon atoms include a vinyl group, an allyl group, a butenyl group and the like.
  • the aryl group having 1 to 10 carbon atoms include a phenyl group.
  • a plurality of R 4 are independent from each other, may be different from each other, it may be the same. The same is true for R 5. However, of the plurality of R 4 and R 5 , at least two or more are hydride groups.
  • R 6 is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, or a hydrocarbon group in which these are combined.
  • alkyl group having 1 to 8 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • aryl group having 1 to 8 carbon atoms include a phenyl group.
  • a plurality of R 6 are independent from each other, may be different from each other, it may be the same.
  • Examples of the substituent of R 4 , R 5 , and R 6 in the formula (2) include a methyl group and a vinyl group, and a methyl group is preferable from the viewpoint of preventing an intramolecular cross-linking reaction.
  • m and n are the number of repeating units constituting the linear organohydrogenpolysiloxane (B1) represented by the formula (2), m is an integer of 2 to 150, and n is an integer of 2 to 150. Is. Preferably, m is an integer of 2 to 100 and n is an integer of 2 to 100.
  • the linear organohydrogenpolysiloxane (B1) may be used alone or in combination of two or more.
  • the branched organohydrogenpolysiloxane (B2) Since the branched organohydrogenpolysiloxane (B2) has a branched structure, it forms a region having a high crosslink density and is a component that greatly contributes to the formation of a sparsely packed structure with a crosslink density in the silicone rubber system. Further, like the linear organohydrogenpolysiloxane (B1), it has a structure ( ⁇ Si—H) in which hydrogen is directly bonded to Si, and in addition to the vinyl group of the vinyl group-containing organopolysiloxane (A), silicone. It is a polymer that hydrosilylates with the vinyl group of the component contained in the rubber-based curable composition and crosslinks these components.
  • the specific gravity of the branched organohydrogenpolysiloxane (B2) is in the range of 0.9 to 0.95.
  • the branched organohydrogenpolysiloxane (B2) is usually preferably one that does not have a vinyl group. As a result, it is possible to accurately prevent the cross-linking reaction from proceeding in the molecule of the branched organohydrogenpolysiloxane (B2).
  • branched organohydrogenpolysiloxane (B2) those represented by the following average composition formula (c) are preferable.
  • R 7 is a monovalent organic group, a is 1 to 3 in the range of integers, m is H a (R 7) 3- a number of SiO 1/2 units, n represents SiO 4 / It is a number of 2 units)
  • R 7 is a monovalent organic group, preferably a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an aryl group, or a hydrocarbon group in combination thereof.
  • alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • aryl group having 1 to 10 carbon atoms include a phenyl group.
  • a is the number of hydride groups (hydrogen atoms directly bonded to Si), and is an integer in the range of 1 to 3, preferably 1.
  • n is the number of SiO 4/2 units.
  • Branched organohydrogenpolysiloxane (B2) has a branched structure.
  • the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpolysiloxane (B2) differ in that their structures are linear or branched, and are different from Si when the number of Si is 1.
  • the number of alkyl groups R to be bonded (R / Si) is 1.8 to 2.1 for the linear organohydrogenpolysiloxane (B1) and 0.8 to 1 for the branched organohydrogenpolysiloxane (B2). It is in the range of 0.7.
  • the branched organohydrogenpolysiloxane (B2) has a branched structure, for example, the amount of residue when heated to 1000 ° C. at a heating rate of 10 ° C./min under a nitrogen atmosphere is 5% or more. It becomes.
  • the linear organohydrogenpolysiloxane (B1) is linear, the amount of residue after heating under the above conditions is almost zero.
  • R 7 is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, or a hydrocarbon group combining these, or a hydrogen atom.
  • alkyl group having 1 to 8 carbon atoms include a methyl group, an ethyl group, a propyl group and the like, and among them, a methyl group is preferable.
  • aryl group having 1 to 8 carbon atoms include a phenyl group.
  • the substituent of R 7 include a methyl group and the like.
  • the plurality of R 7s are independent of each other and may be different from each other or may be the same.
  • the branched organohydrogenpolysiloxane (B2) may be used alone or in combination of two or more.
  • the amount of hydrogen atoms (hydride groups) directly bonded to Si is not particularly limited.
  • the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpoly are added to 1 mol of the vinyl group in the vinyl group-containing linear organopolysiloxane (A1).
  • the total amount of hydride groups of siloxane (B2) is preferably 0.5 to 5 mol, more preferably 1 to 3.5 mol.
  • the silicone rubber-based curable composition according to the present embodiment contains a non-conductive filler.
  • the non-conductive filler may contain silica particles (C), if necessary. As a result, the hardness and mechanical strength of the elastomer can be improved.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same type of non-conductive filler.
  • the non-conductive fillers of the same type may have at least a common constituent material, and may differ in particle size, specific surface area, surface treatment agent, or the amount added thereof.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may further contain different silane coupling agents.
  • the silica particles (C) are not particularly limited, but for example, fumed silica, calcined silica, precipitated silica and the like are used. These may be used alone or in combination of two or more.
  • the specific surface area of the silica particles (C) according to the BET method is preferably, for example, 50 to 400 m 2 / g, and more preferably 100 to 400 m 2 / g.
  • the average primary particle size of the silica particles (C) is preferably, for example, 1 to 100 nm, and more preferably about 5 to 20 nm.
  • silica particles (C) within the range of the specific surface area and the average particle size, it is possible to improve the hardness and mechanical strength of the formed silicone rubber, particularly the tensile strength.
  • the silicone rubber-based curable composition of the present embodiment can contain a silane coupling agent (D).
  • the silane coupling agent (D) can have a hydrolyzable group.
  • the hydrolyzing group is hydrolyzed by water to become a hydroxyl group, and this hydroxyl group undergoes a dehydration condensation reaction with the hydroxyl group on the surface of the silica particles (C), whereby the surface of the silica particles (C) can be modified.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same type of silane coupling agent. It is sufficient that the silane coupling agent of the same type has at least a common functional group, and other functional groups in the molecule and the amount of addition may be different.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may further contain different silane coupling agents.
  • this silane coupling agent (D) can contain a silane coupling agent having a hydrophobic group.
  • this hydrophobic group is imparted to the surface of the silica particles (C), so that the cohesive force of the silica particles (C) is reduced in the silicone rubber-based curable composition and thus in the silicone rubber (hydrogen due to silanol groups). Aggregation due to bonding is reduced), and as a result, it is presumed that the dispersibility of the silica particles (C) in the silicone rubber-based curable composition is improved. As a result, the interface between the silica particles (C) and the rubber matrix is increased, and the reinforcing effect of the silica particles (C) is increased.
  • the slipperiness of the silica particles (C) in the matrix is improved when the rubber matrix is deformed. Then, by improving the dispersibility and slipperiness of the silica particles (C), the mechanical strength (for example, tensile strength, tear strength, etc.) of the silicone rubber due to the silica particles (C) is improved.
  • the silane coupling agent (D) can include a silane coupling agent having a vinyl group.
  • a vinyl group is introduced on the surface of the silica particles (C). Therefore, when the silicone rubber-based curable composition is cured, that is, the vinyl group contained in the vinyl group-containing organopolysiloxane (A) and the hydride group contained in the organohydrogenpolysiloxane (B) undergo a hydrosilylation reaction. When the network (crosslinked structure) formed by these is formed, the vinyl group of the silica particles (C) is also involved in the hydrosilylation reaction with the hydride group of the organohydrogenpolysiloxane (B). Silica particles (C) will also be incorporated into the siloxane. As a result, it is possible to reduce the hardness and increase the modulus of the formed silicone rubber.
  • silane coupling agent (D) a silane coupling agent having a hydrophobic group and a silane coupling agent having a vinyl group can be used in combination.
  • silane coupling agent (D) examples include those represented by the following formula (4).
  • n represents an integer of 1 to 3.
  • Y represents any functional group having a hydrophobic group, a hydrophilic group or a vinyl group, and when n is 1, it is a hydrophobic group, and when n is 2 or 3, at least one of them is. It is a hydrophobic group.
  • X represents a hydrolyzable group.
  • the hydrophobic group is an alkyl group having 1 to 6 carbon atoms, an aryl group, or a hydrocarbon group in which these are combined, and examples thereof include a methyl group, an ethyl group, a propyl group, a phenyl group, and the like. Methyl groups are preferred.
  • hydrophilic group examples include a hydroxyl group, a sulfonic acid group, a carboxyl group, a carbonyl group and the like, and among them, a hydroxyl group is particularly preferable.
  • the hydrophilic group may be contained as a functional group, but is preferably not contained from the viewpoint of imparting hydrophobicity to the silane coupling agent (D).
  • examples of the hydrolyzable group include an alkoxy group such as a methoxy group and an ethoxy group, a chloro group or a silazane group, and among them, a silazane group is preferable because it has high reactivity with the silica particles (C).
  • a silazane group is preferable because it has high reactivity with the silica particles (C).
  • those having a silazane group as hydrolyzable groups the characteristics of its structure the formula (4) in the structure of (Y n -Si-) comes to have two.
  • silane coupling agent (D) represented by the above formula (4) are as follows.
  • the functional group having a hydrophobic group include methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, and n-propyltrimethoxysilane.
  • alkoxysilanes such as n-propyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, decyltrimethoxysilane; chlorosilanes such as methyltrichlorosilane, dimethyldichlorosilane, trimethylchlorosilane, phenyltrichlorosilane; hexamethyldisilazane. Can be mentioned.
  • a silane coupling agent having a trimethylsilyl group containing at least one selected from the group consisting of hexamethyldisilazane, trimethylchlorosilane, trimethylmethoxysilane, and trimethylethoxysilane is preferable.
  • Examples of those having a vinyl group as the functional group include methaloxypropyltriethoxysilane, methaloxypropyltrimethoxysilane, methaloxypropylmethyldiethoxysilane, methaloxypropylmethyldimethoxysilane, vinyltriethoxysilane, and vinyltrimethoxy.
  • Examples thereof include alkoxysilanes such as silane and vinylmethyldimethoxysilane; chlorosilanes such as vinyltrichlorosilane and vinylmethyldichlorosilane; and divinyltetramethyldisilazane.
  • a silane coupling agent having a vinyl group-containing organosilyl group containing at least one selected from the group consisting of methyldimethoxysilane is preferable.
  • silane coupling agent (D) contains two types of a silane coupling agent having a trimethylsilyl group and a silane coupling agent having a vinyl group-containing organosilyl group, hexamethyldisilazane as having a hydrophobic group is used. Those having a vinyl group preferably contain divinyltetramethyldisilazane.
  • the ratio of (D1) to (D2) is not particularly limited, but for example, By weight ratio (D1): (D2) is 1: 0.001 to 1: 0.35, preferably 1: 0.01 to 1: 0.20, more preferably 1: 0.03 to 1: 0. It is .15. With such a numerical range, the desired physical properties of the silicone rubber can be obtained. Specifically, it is possible to balance the dispersibility of silica in the rubber and the crosslinkability of the rubber.
  • the lower limit of the content of the silane coupling agent (D) is preferably 1% by mass or more with respect to 100 parts by weight of the total amount of the vinyl group-containing organopolysiloxane (A). It is more preferably mass% or more, and further preferably 5 mass% or more.
  • the upper limit of the content of the silane coupling agent (D) is preferably 100% by mass or less, preferably 80% by mass or less, based on 100 parts by mass of the total amount of the vinyl group-containing organopolysiloxane (A). More preferably, it is more preferably 40% by mass or less.
  • the silicone rubber can have appropriate mechanical properties.
  • the silicone rubber-based curable composition according to the present embodiment may contain a catalyst.
  • the catalyst can include platinum or platinum compound (E). Platinum or the platinum compound (E) is a catalytic component that acts as a catalyst during curing. The amount of platinum or platinum compound (E) added is the amount of catalyst.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same type of catalyst.
  • the catalysts of the same type may have at least a common constituent material, and the catalysts may contain different compositions or may be added in different amounts.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may further contain different catalysts from each other.
  • platinum or the platinum compound (E) known ones can be used, for example, platinum black, platinum supported on silica, carbon black or the like, platinum chloride acid or an alcohol solution of platinum chloride acid, chloride. Examples thereof include a complex salt of platinum acid and olefin, and a complex salt of platinum chloride acid and vinyl siloxane.
  • the platinum or the platinum compound (E) may be used alone or in combination of two or more.
  • the content of platinum or the platinum compound (E) in the silicone rubber-based curable composition means a catalytic amount and can be appropriately set, but specifically, a vinyl group-containing organopolysiloxane.
  • the amount of the platinum group metal is 0.01 to 1000 ppm in terms of weight with respect to 100 parts by weight of the total amount of (A), the silica particles (C) and the silane coupling agent (D), and is preferably 0.
  • the amount is 1 to 500 ppm.
  • the silicone rubber-based curable composition according to the present embodiment may contain water (F) in addition to the above components (A) to (E).
  • Water (F) functions as a dispersion medium for dispersing each component contained in the silicone rubber-based curable composition, and is a component that contributes to the reaction between the silica particles (C) and the silane coupling agent (D). .. Therefore, in the silicone rubber, the silica particles (C) and the silane coupling agent (D) can be more reliably connected to each other, and uniform characteristics can be exhibited as a whole.
  • the silicone rubber-based curable composition of the present embodiment may further contain other components in addition to the above components (A) to (F).
  • Other components include silica particles (C) such as diatomaceous earth, iron oxide, zinc oxide, titanium oxide, barium oxide, magnesium oxide, cerium oxide, calcium carbonate, magnesium carbonate, zinc carbonate, glass wool, and mica.
  • silica particles (C) such as diatomaceous earth, iron oxide, zinc oxide, titanium oxide, barium oxide, magnesium oxide, cerium oxide, calcium carbonate, magnesium carbonate, zinc carbonate, glass wool, and mica.
  • additives such as inorganic fillers, reaction inhibitors, dispersants, pigments, dyes, antioxidants, antioxidants, flame retardants, and thermal conductivity improvers.
  • the conductive solution (conductive silicone rubber composition) according to the present embodiment contains the above-mentioned conductive filler and solvent in addition to the above-mentioned silicone rubber-based curable composition which does not contain the above-mentioned conductive filler.
  • solvent various known solvents can be used, and for example, a high boiling point solvent can be included. These may be used alone or in combination of two or more.
  • solvent examples include aliphatic hydrocarbons such as pentane, hexane, cyclohexane, heptane, methylcyclohexane, ethylcyclohexane, octane, decane, dodecane and tetradecane; benzene, toluene, ethylbenzene, xylene and trifluoromethylbenzene.
  • aliphatic hydrocarbons such as pentane, hexane, cyclohexane, heptane, methylcyclohexane, ethylcyclohexane, octane, decane, dodecane and tetradecane
  • benzene toluene
  • ethylbenzene xylene and trifluoromethylbenzene.
  • Aromatic hydrocarbons such as benzotrifluoride; diethyl ether, diisopropyl ether, dibutyl ether, cyclopentyl methyl ether, cyclopentyl ethyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, 1,4-dioxane, 1,3 -Ethers such as dioxane and tetrahydrofuran; haloalcans such as dichloromethane, chloroform, 1,1-dichloroethane, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane; N, N-dimethyl Carboxylamides such as formamide and N, N-dimethylacetamide; sulfoxides such as dimethylsulfoxide and diethylsulfoxide can be exemplified. These may be used alone or in
  • the conductive solution can have an appropriate viscosity for various coating methods such as spray coating and dip coating.
  • the lower limit of the content of the silica particles (C) contained in the electrode 13 is the total of the silica particles (C) and the conductive filler.
  • the amount of 100% by mass for example, it can be 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass or more.
  • the mechanical strength of the electrode 13 can be improved.
  • the upper limit of the content of the silica particles (C) contained in the electrode 13 is, for example, 20% by mass or less, preferably 20% by mass or less, based on 100% by mass of the total amount of the silica particles (C) and the conductive filler. Is 15% by mass or less, more preferably 10% by mass or less. As a result, it is possible to balance the conductivity of the electrode 13 with the mechanical strength and flexibility.
  • a conductive silicone rubber can be obtained by heating and drying the conductive solution as needed.
  • the conductive silicone rubber may have a structure that does not contain silicone oil. As a result, it is possible to prevent the silicone oil from bleeding out to the surface of the electrode 13 to reduce the conductivity.
  • the band member 11 When the band member 11 is molded with silicone rubber, the band member 11 and the plurality of protrusions 12 are seamlessly bonded by molding a curable elastomer composition such as a silicone rubber-based curable composition.
  • a curable elastomer composition such as a silicone rubber-based curable composition.
  • the body is obtained.
  • the electroencephalogram detection electrode 10 which is excellent in flexibility (that is, flexibility capable of following the head 99) and strength and which follows the head 99 well.
  • the rubber hardness A that is, the flexibility can be controlled by appropriately selecting the type and blending amount of each component contained in the silicone rubber-based curable composition, the method for preparing the silicone rubber-based curable composition, and the like.
  • An example of the method for manufacturing the electroencephalogram detection electrode 10 of the present embodiment can include the following steps. First, the silicone rubber-based curable composition is heat-press molded using a mold to obtain a molded product composed of a band member 11 and a protrusion 12. Subsequently, a signal line 14 was passed through the inside of each protrusion 12 of the obtained molded product using a sewing needle. After that, a paste-like conductive solution is dip-coated on the surface (predetermined height h2) of the tip portion of the protrusion 12 of the obtained molded body, and after heating and drying, post-cure is performed. As a result, the electrode 13 can be formed on the surface of the protrusion 12. From the above, the electroencephalogram detection electrode 10 can be manufactured. In the molding step, insert molding may be used in which the silicone rubber-based curable composition is introduced into the molding space in which the signal line 14 is arranged and pressure-heat molded.
  • the electroencephalogram detection electrode 10 includes a rubber-like elastic band member 11 that is attached following the shape of the human head 99. On one surface of the band member 11, a plurality of elastic body protrusions 12 provided integrally with the band member 11 and Have, At least the tip of the protrusion 12 constitutes an electrode 13 made of a conductive member. Since the band member 11 is a rubber-like elastic body, it follows the shape of the human head 99. As a result, the electroencephalogram detection electrode 10 can be attached regardless of the shape of the human head 99.
  • the band members 11 of the plurality of protrusions 12 are arranged as a whole, the pressure at the time of mounting can be dispersed. Further, since it has the flexibility to follow the shape of the head 99 when worn, the pressure does not concentrate on the specific protrusion 12 (electrode 13), and it is possible to avoid making a person feel uncomfortable. .. In other words, it is possible to avoid affecting the measurement result by feeling uncomfortable. Further, since the band member 11 is an elastic body and has flexibility, the electrode 13 of the protrusion 12 comes into contact with the head 99 in an appropriate direction and with an appropriate pressure. From this point of view, EEG detection can be stabilized. (2) The adjacent protrusions 12 have a pitch P of 1 mm or more and 20 mm or less.
  • the conductive member is made of a paste containing a good conductive metal. That is, by using the material of the electrode 13 as a paste, the electrode 13 can be stably formed on the tip portion of the protrusion 12. Further, since it can be formed by dipping (immersion coating) in a paste-like conductive solution as described above, it is easy to control the thickness and range (predetermined height h2) of forming the electrode 13.
  • the good conductive metal includes one or more selected from the group consisting of copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, or alloys thereof.
  • the electrode 13 can be easily manufactured and the manufacturing quality can be stabilized.
  • a paste of a good conductive metal containing silver and silver chloride is suitable for the electrode 13 of the electroencephalogram detection electrode 10.
  • the band member 11 is made of silicone rubber. Silicone rubber is very well-balanced in terms of degree of elasticity (flexibility), flexibility, and durability (weather resistance, chemical resistance), and is easy to manufacture and keep costs down.
  • the protrusions 12 are arranged in a row. By arranging the protrusions 12 in a row, the protrusions 12 can be appropriately followed by the head 99, and the protrusions 12 (electrodes 13) can be stably brought into contact with the head 99.
  • FIG. 8 shows a plan view of the electroencephalogram detection electrode 10A of the present embodiment.
  • the difference from the first embodiment is mainly in the arrangement of the protrusions 12. That is, in the first embodiment, the plurality of protrusions 12 are arranged in a row in the same direction. On the other hand, in the present embodiment, a plurality of protrusions 12 are arranged in two rows. That is, it can be said that the configuration is such that the arrangement of the protrusions 12 of the first embodiment is added in another row. In other words, the plurality of protrusions 12 are arranged in a grid pattern (regular grid pattern).
  • ⁇ Effect of embodiment> In the electroencephalogram detection electrode 10A of the present embodiment, a plurality of protrusions 12 are arranged in a grid pattern (regular grid pattern). As a result, the effect of the first embodiment can be realized, and the protrusion 12 (that is, the electrode 13) suitable for detecting the brain wave can be arranged. That is, stable brain wave detection can be realized.
  • FIG. 9 shows a plan view of the electroencephalogram detection electrode 10B of the present embodiment.
  • the difference from the first embodiment is mainly in the arrangement of the protrusions 12. That is, in the first embodiment, the plurality of protrusions 12 are arranged in a row in the same direction. On the other hand, in the present embodiment, a plurality of protrusions 12 are arranged in two rows. However, unlike the electroencephalogram detection electrode 10A of the second embodiment, the protrusions 12 are arranged in a staggered manner. In other words, the plurality of protrusions 12 are arranged in a houndstooth pattern.
  • ⁇ Effect of embodiment> In the electroencephalogram detection electrode 10B of the present embodiment, a plurality of protrusions 12 are arranged in a houndstooth pattern. As a result, the effect of the first embodiment can be realized, and the protrusion 12 (that is, the electrode 13) suitable for detecting the brain wave can be arranged. That is, stable brain wave detection can be realized.
  • FIG. 10 shows a plan view of the electroencephalogram detection electrode 10C of the present embodiment.
  • the feature of this embodiment is that a plurality of protrusions 12 are arranged in two rows, and the number (density) of the protrusions 12 in the front row (+ Y side row) is reduced.
  • the protrusions 12 in the rear row ( ⁇ Y side row) in the drawing are arranged at a predetermined first pitch P c1.
  • the protrusions 12 in the back row (+ Y side) are arranged at a predetermined second pitch P c2 (for example, twice the first pitch P c1 ).
  • P c2 for example, twice the first pitch P c1
  • the electroencephalogram detection electrode 10C of the present embodiment a plurality of protrusions 12 are arranged alternately and at different densities.
  • the protrusion 12 that is, the electrode 13
  • stable brain wave detection can be realized.
  • the human head 99 has a common constant shape. Further, the shape of the head 99 to which the electroencephalogram detection electrode 10 is attached and the position of the head 99 to be touched when the electrode 10 is attached has certain characteristics. According to the electroencephalogram detection electrode 10C, such a feature can be well followed.
  • FIG. 11 shows a plan view of the electroencephalogram detection electrode 10D of the present embodiment.
  • the electroencephalogram detection electrode 10D of the present embodiment is the same as the first embodiment in that a plurality of protrusions 12 are arranged in a row, but the orientation of the protrusions 12 is different. This makes it appropriately correspond to the flow of hair.
  • the left half (8 on the left side) of the protrusions 12 is oriented to the right (that is, the band member 11 is oriented toward the center in the longitudinal direction), and the right half (8 on the right) of the protrusions in the figure.
  • the direction of 12 is leftward (that is, toward the center of the band member 11 in the longitudinal direction). In other words, when the electroencephalogram detection electrode 10 is attached to the head 99, it can be said that each of the protrusions 12 faces the top of the head 99.
  • each of the protrusions 12 faces the top of the head 99. Therefore, the electroencephalogram detection electrode 10 can be attached by appropriately following the flow and amount of hair on the head 99.
  • the band member 11 is worn in a curved state from a flat state, it comes into contact with the head 99 from the gentle side of the protrusion 12, so that it is possible to avoid giving discomfort.
  • FIG. 12 shows a plan view of the electroencephalogram detection electrode 10E of the present embodiment.
  • the electroencephalogram detection electrode 10E of the present embodiment is the same as the first and fifth embodiments in that a plurality of protrusions 12 are arranged in a row, but the orientation of the protrusions 12 is different. This makes it appropriately correspond to the flow of hair.
  • the direction of the protrusions 12 on the left half (8 on the left side) in the drawing is leftward (that is, the left end side in the longitudinal direction of the band member 11), and the right half (8 pieces on the right side) in the drawing.
  • the direction of the protrusion 12 is to the right (that is, to the right end side in the longitudinal direction of the band member 11). In other words, when the electroencephalogram detection electrode 10 is attached to the head 99, it can be said that each of the protrusions 12 faces downward (ear position side) from the top of the head 99.
  • the electroencephalogram detection electrode 10E of the present embodiment when the electroencephalogram detection electrode 10 is attached to the head 99 as described above, the respective protrusions 12 face downward from the top of the head 99. Therefore, the electroencephalogram detection electrode 10 can be attached by appropriately following the flow and amount of hair on the head 99.
  • the band member 11 when the band member 11 is attached to the inner surface 11a of the band in a state of being curved to some extent, the band member 11 comes into contact with the head 99 from the gentle side of the protrusion 12, so that it is possible to avoid giving discomfort.
  • FIG. 13 shows a plan view of the electroencephalogram detection electrode 10F of the present embodiment.
  • a part 12 is additionally provided.
  • the front (+ Y side) protrusion 12 in the figure is backward ( ⁇ Y direction), and the rear ( ⁇ Y side) protrusion 12 in the figure. Is forward (+ Y direction). That is, two opposing protrusions 12 are provided that face the center (the center of each of the longitudinal direction and the lateral direction) of the band member 11 (band inner surface 11a) when viewed from above.
  • the electroencephalogram detection electrode 10F of the present embodiment has the same effect as the electroencephalogram detection electrode 10D of the fifth embodiment. Further, by adding the above-mentioned two opposing protrusions 12, it is possible to stabilize the attachment of the electroencephalogram detection electrode 10 to the head 99.
  • FIG. 14 shows a plan view of the electroencephalogram detection electrode 10G of the present embodiment.
  • two projections 12 are arranged in the electroencephalogram detection electrode 10E of the sixth embodiment, and two band members 11 are oriented backward to each other in the center of the longitudinal direction.
  • a protrusion 12 is additionally provided.
  • the front (+ Y side) protrusion 12 in the figure is forward (+ Y direction), and the rear ( ⁇ Y side) protrusion 12 in the figure. Is backward (-Y direction). That is, two dorsal protrusions 12 are provided at the center (each center in the longitudinal direction and the lateral direction) of the band member 11 (band inner surface 11a) when viewed from above.
  • the electroencephalogram detection electrode 10G of the present embodiment has the same effect as the electroencephalogram detection electrode 10E of the sixth embodiment. Furthermore, by adding the above-mentioned two dorsal protrusions 12, it is possible to improve the wearability of the electroencephalogram detection electrode 10 to the head 99, particularly the function of the protrusions 12 to separate and stabilize the hair. it can.
  • the rows of the plurality of protrusions 12 in the electroencephalogram detection electrode 10D of the fifth embodiment are formed into two front and rear rows.
  • the direction of the protrusions 12 on the left half (8 in each row on the left) is to the right (that is, to the center in the longitudinal direction of the band member 11), and the right half is shown.
  • the direction of the protrusions 12 (8 in each row on the right side) is to the left (that is, to the center in the longitudinal direction of the band member 11).
  • the electroencephalogram detection electrode 10H of the present embodiment has the same effect as the electroencephalogram detection electrode 10D of the fifth embodiment. Further, by arranging the plurality of protrusions 12 in two rows, front and back, the same effect as that of the electroencephalogram detection electrode 10B of the second embodiment, that is, the protrusions 12 (that is, the electrodes) suitable for brain wave detection. 13) can be arranged, and stable electroencephalogram detection can be realized.
  • the rows of the plurality of protrusions 12 in the electroencephalogram detection electrode 10E of the sixth embodiment are formed into two front and rear rows.
  • the direction of the protrusions 12 on the left half (8 in each row on the left side) is leftward (that is, toward the left end portion in the longitudinal direction of the band member 11), which is shown in the figure.
  • the direction of the protrusions 12 on the right half (8 in each row on the right side) is to the right (that is, to the right end side in the longitudinal direction of the band member 11).
  • the electroencephalogram detection electrode 10I of the present embodiment has the same effect as the electroencephalogram detection electrode 10E of the fifth embodiment. Further, by arranging the plurality of protrusions 12 in two rows, front and back, the same effect as that of the electroencephalogram detection electrode 10B of the second embodiment, that is, the protrusions 12 (that is, the electrodes) suitable for brain wave detection. 13) can be arranged, and stable electroencephalogram detection can be realized.
  • a triangular pyramid is exemplified, but another pyramid such as a cone or a quadrangular pyramid, or a frustum cone from which the top of the pyramid is removed may be used.
  • an electroencephalogram detection electrode 10 in which the band member 11 and the protrusion 12 described in the embodiment are integrally formed of silicone rubber was used.
  • the protrusions 12 are arranged in the same row as in FIGS. 3 and 4.
  • the specific specifications of the band member 11 and the protrusion 12 (electrode 13) are as follows, and the height h1, pitch P, thickness t, and width L2 correspond to those shown in FIGS. 3 and 4.
  • the subject used the same electroencephalogram detection electrode 10.
  • Silica particles (C) (C): Silica fine particles (particle size 7 nm, specific surface area 300 m 2 / g), manufactured by Nippon Aerosil Co., Ltd., "AEROSIL300"
  • D-1) Hexamethyldisilazane (HMDZ), manufactured by Gelest, "HEXAMETHYLDISILAZASE” (SIH6110.1).
  • D-2) Divinyltetramethyldisilazane, manufactured by Gelest, "1,3-DIVINYLTETRAMETHYLDISILAZANE (SID4612.0)"
  • Method powder (G)) (G1): Silver powder, manufactured by Tokuri Chemical Research Institute, trade name "TC-101", median diameter d 50 : 8.0 ⁇ m, aspect ratio 16.4, average major axis 4.6 ⁇ m
  • the vinyl group content calculated by 1 H-NMR spectrum measurement was 0.04 mol%.
  • a silicone rubber-based curable composition was prepared as follows. First, a mixture of 90% vinyl group-containing organopolysiloxane (A), silane coupling agent (D) and water (F) is kneaded in advance at the ratio shown in Table 1 below, and then silica particles (silica particles (A)) are added to the mixture. C) was added and further kneaded to obtain a kneaded product (silicone rubber compound). Here, the kneading after the addition of the silica particles (C) is carried out in the first step of kneading for 1 hour under the condition of 60 to 90 ° C.
  • the band member 11 and the protrusion 12 (electrode 13) of the example and the electrode portion of the comparative example were produced by the following method.
  • the silicone rubber-based curable composition A obtained above is heated at 180 ° C. and 10 MPa for 10 minutes using a mold having a plurality of molding spaces (recesses) of the band member 11 and the protrusion 12 of the triangular pyramid. , And obtained a molded body in which the band member 11 and the protrusion 12 were integrated in each recess (molding step).
  • a conductive wire A (manufactured by Mitsufuji, AGposs, thickness: 100d / 34f, tensile elongation at break: 29.3%) was passed through the inside of the protrusion 12 of the obtained molded product using a sewing needle (manufactured by Mitsufuji Co., Ltd., AGposs, thickness: 100d / 34f, tensile elongation at break: 29.3%). Conductive wire insertion process). Subsequently, the surface (predetermined height h2) of the tip of the protrusion 12 of the molded product was dipped in the above ⁇ conductive solution for dip coating> and dried by heating at 120 ° C. for 30 minutes (tip coating step). ).
  • an electroencephalogram detection electrode 10 having a plurality of triangular pyramid protrusions 12 on the band member 11 shown in FIG. 1 was obtained.
  • the electrode portion of the comparative example was also produced by using the silicone rubber-based curable composition A through the same steps.
  • Table 2 shows the attributes of the subjects and the evaluation results.
  • ⁇ Subject> The evaluation was performed on 5 subjects. The attributes of the subjects are as shown in Table 2, and the ages were in their 20s to 50s and their heights were 160 cm to 178 cm.
  • the wearability was 100%, and the average wearing comfort was 1, and all 5 people evaluated that "there is a feeling of contact, but it does not bother me”.
  • the wearability was 40% (only 2 out of 5 people were allowed), and the average wearing comfort was 2.1.
  • the electroencephalogram detection electrode 500 of the comparative example needs to facilitate the electroencephalogram detection electrodes 10 of a plurality of sizes in order to correspond to an unspecified subject.
  • the electroencephalogram detection electrode 10 of the embodiment it was confirmed that one size of the electroencephalogram detection electrode 10 can handle various types of subjects.
  • EEG detection system 10 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H, 10I EEG detection electrode 11 Band member 11a Band inner surface 12 Projection 13 Electrode 14 Signal line 20 EEG display device

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Abstract

L'invention concerne une électrode de détection d'ondes cérébrales (10) comprenant : un élément bande élastique en caoutchouc (11) porté de sorte qu'il suive la forme d'une tête humaine; et une pluralité de partie saillantes élastiques (12) disposées d'un seul tenant avec l'élément bande (11), sur une surface de celui-ci (11). Au moins les pointes des parties saillantes (12) constituent des électrodes (13) comprenant un élément conducteur.
PCT/JP2020/043373 2019-12-16 2020-11-20 Électrode et système de détection d'ondes cérébrales WO2021124795A1 (fr)

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JPWO2023048065A1 (fr) * 2021-09-24 2023-03-30

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US4967038A (en) * 1986-12-16 1990-10-30 Sam Techology Inc. Dry electrode brain wave recording system
JP2009530064A (ja) * 2006-03-22 2009-08-27 エモーティブ システムズ ピーティーワイ リミテッド 電極および電極ヘッドセット
JP2017064031A (ja) * 2015-09-30 2017-04-06 東海光学株式会社 脳活動検出システム、脳活動検出システムを使用した脳活動の解析方法、そのような脳活動の解析方法による個人特性の評価方法及び個人の見え方の評価方法
JP2018102404A (ja) * 2016-12-22 2018-07-05 グンゼ株式会社 生体電極

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US4967038A (en) * 1986-12-16 1990-10-30 Sam Techology Inc. Dry electrode brain wave recording system
JP2009530064A (ja) * 2006-03-22 2009-08-27 エモーティブ システムズ ピーティーワイ リミテッド 電極および電極ヘッドセット
JP2017064031A (ja) * 2015-09-30 2017-04-06 東海光学株式会社 脳活動検出システム、脳活動検出システムを使用した脳活動の解析方法、そのような脳活動の解析方法による個人特性の評価方法及び個人の見え方の評価方法
JP2018102404A (ja) * 2016-12-22 2018-07-05 グンゼ株式会社 生体電極

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023048065A1 (fr) * 2021-09-24 2023-03-30
JP7375958B2 (ja) 2021-09-24 2023-11-08 住友ベークライト株式会社 脳波検出用電極、脳波測定装置及び脳波測定方法

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