WO2022163382A1 - Électrode de mesure d'onde cérébrale, dispositif de mesure d'onde cérébrale et procédé de mesure d'onde cérébrale - Google Patents

Électrode de mesure d'onde cérébrale, dispositif de mesure d'onde cérébrale et procédé de mesure d'onde cérébrale Download PDF

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Publication number
WO2022163382A1
WO2022163382A1 PCT/JP2022/001068 JP2022001068W WO2022163382A1 WO 2022163382 A1 WO2022163382 A1 WO 2022163382A1 JP 2022001068 W JP2022001068 W JP 2022001068W WO 2022163382 A1 WO2022163382 A1 WO 2022163382A1
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Prior art keywords
electrode
group
electroencephalogram measurement
base
cap
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PCT/JP2022/001068
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English (en)
Japanese (ja)
Inventor
隆 八木澤
将志 澤田
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住友ベークライト株式会社
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Priority to JP2022527131A priority Critical patent/JP7294537B2/ja
Publication of WO2022163382A1 publication Critical patent/WO2022163382A1/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

Definitions

  • the present invention relates to an electroencephalogram measurement electrode, an electroencephalogram measurement device, and an electroencephalogram measurement method.
  • the electroencephalogram measurement electrode (electroencephalogram detection bioelectrode) disclosed in Patent Document 1 includes a holder portion having a plurality of through holes, a base portion extending outward from the peripheral surface of the through hole, and a base portion protruding from the base portion. an electrode portion formed of at least one conductive elastic body having at least one projecting portion capable of passing through the through hole; and a conductive lid portion sandwiching the base portion and the holder portion.
  • an adhesive may be used for housing.
  • the adhesive may leak into the snap-button-shaped connection member, causing a conduction failure, and there is a problem that the management of the manufacturing process becomes troublesome.
  • the present invention has been made in view of such circumstances, and provides an electroencephalogram measurement electrode in which an electrode portion (base portion, projection portion) of an elastic member is housed in a holder made of resin.
  • the purpose is to provide a technology to properly accommodate the
  • a columnar base formed of an elastic member; a plurality of electrode projections provided at one end of the base; a conductive portion provided at least on the tip side surface of the electrode projection; a signal path extending to the other end of the base; a conductive connection member provided at the other end of the base directly or via a metal foil and having a connection projection extending in a direction opposite to the base; a holder that holds the electrode part,
  • the holder has a cylindrical shape with a bottom, a through hole provided in the bottom surface of the cylindrical shape with a bottom, through which the connection protrusion of the conductive connection member protrudes in a state in which the electrode portion is held by the holder; and a pressing portion that presses the electrode portion in the thickness direction of the base portion at the end portion opposite to the bottom surface.
  • the electroencephalogram measurement electrode a frame holding the plurality of electroencephalogram measurement electrodes; a measurement unit that is connected to the connection projection of the conductive connection member and measures the measured electroencephalogram signal;
  • An electroencephalogram measurement device is provided.
  • An electroencephalogram measurement method is provided in which the electroencephalogram measurement device is mounted on the subject's head to measure electroencephalograms.
  • an electroencephalogram measurement electrode in which an electrode portion (base portion, protruding portion) of an elastic member is housed in a holder made of resin, there is provided a technique for appropriately housing the electrode portion in the holder without using an adhesive. can be done.
  • FIG. 1 is a diagram schematically showing an electroencephalogram measuring device attached to a person's head according to a first embodiment
  • FIG. 1 is a perspective view of a frame according to the first embodiment
  • FIG. 1 is a perspective view of an electroencephalogram measurement electrode according to a first embodiment
  • FIG. 1 is a cross-sectional view schematically showing an electroencephalogram detection electrode according to a first embodiment
  • FIG. 5 is a cross-sectional view schematically showing an electroencephalogram detection electrode according to a second embodiment
  • FIG. 11 is a cross-sectional view schematically showing an electroencephalogram detection electrode according to a third embodiment
  • FIG. 11 is a perspective view of an electroencephalogram detection electrode according to a fourth embodiment
  • FIG. 1 is a diagram schematically showing an electroencephalogram measuring device attached to a person's head according to a first embodiment
  • FIG. 1 is a perspective view of a frame according to the first embodiment
  • FIG. 1 is a perspective view of an electroencephalogram measurement
  • FIG. 11 is a cross-sectional view schematically showing an electroencephalogram detection electrode according to a fifth embodiment;
  • FIG. 11 is a cross-sectional view schematically showing an electroencephalogram detection electrode according to a sixth embodiment;
  • FIG. 11 is a cross-sectional view schematically showing an electroencephalogram detection electrode according to a seventh embodiment;
  • FIG. 1 is a diagram schematically showing the electroencephalogram measurement device 1 attached to the head 99 of a person (subject).
  • the electroencephalogram measurement device 1 is attached to a person's head 99, detects electroencephalograms as potential fluctuations from a living body, and outputs the detected electroencephalograms to a measurement unit (not shown).
  • the measurement unit acquires the electroencephalogram detected by the electroencephalogram measurement electrode 10, displays it on a monitor, stores the data, and performs well-known electroencephalogram analysis processing.
  • the electroencephalogram measurement device 1 has a plurality of electroencephalogram measurement electrodes 10 and a frame 20 .
  • the electroencephalogram measurement electrodes 10 are provided for 5 channels (five pieces).
  • FIG. 20 A perspective view of the frame 20 is shown in FIG.
  • the frame 20 is made of a rigid material such as polyamide resin, and is formed in a strip shape and curved so as to follow the shape of the human head 99 .
  • the frame 20 is provided with five electrode unit attachment portions 21 as openings for attaching the electroencephalogram measurement electrodes 10 .
  • the position of the electrode unit mounting portion 21 (that is, the mounting position of the electroencephalogram measurement electrode 10) corresponds to, for example, positions T3, C3, Cz, C4, and T4 in the International 10-20 Electrode Arrangement Method.
  • the inner peripheral surface of the electrode unit mounting portion 21 is set to have substantially the same outer diameter as the outer peripheral surface of the electroencephalogram measurement electrode 10, and the electroencephalogram measurement electrode 10 is fitted and fixed to the electrode unit mounting portion 21. be done.
  • the inner peripheral surface of the electrode unit attachment portion 21 and the outer peripheral surface of the electroencephalogram measurement electrode 10 may be threaded so that the electroencephalogram measurement electrode 10 is screwed to the electrode unit attachment portion 21 .
  • FIG. 3 shows a perspective view of the electroencephalogram measurement electrode 10.
  • FIG. 4 shows a schematic cross-sectional view of the electroencephalogram measurement electrode 10 .
  • the electroencephalogram measurement electrode 10 has an electrode section 30 , a snap button 40 , a cap 50 and a metal foil 60 .
  • the cap 50 has a bottomed cylindrical shape and functions as a holder, and accommodates the electrode section 30, the snap button 40, and the metal foil 60 therein. As will be described later, the cap 50 has an electrode portion 30, a snap button 40, and a pressing portion 56 for accommodating and fixing the metal foil 60 inside.
  • the electrode portion 30 has a base portion 31 , a projection portion 32 , a conductive contact portion 33 and a signal line portion 34 .
  • the base portion 31 and the projection portion 32 are integrally provided by a rubber-like elastic member. A specific material for the elastic member will be described later. Note that the base portion 31 and the projection portion 32 are not limited to being provided integrally, and may be provided separately and assembled with an adhesive or a fitting structure.
  • the base 31 has a substantially cylindrical shape.
  • a plurality of substantially conical protrusions 32 protruding downward in the drawing are provided at predetermined intervals in the circular circumferential direction on a circular base lower surface 36 on one end side (lower side in the drawing) of the base 31 .
  • the shape of the protrusion 32 is not limited to the conical shape, and various shapes such as pyramids such as triangular pyramids and quadrangular pyramids, and columnar shapes can be employed.
  • a conductive contact portion 33 is provided on at least the tip side surface of the protruding portion 32 .
  • a conductive contact portion 33 may be provided over the entire surface of the protrusion 32 .
  • the outer diameter of the base portion 31 is, for example, 10 mm to 50 mm.
  • the height (thickness) of the base 31 is, for example, 2 mm to 30 mm.
  • the height of the protrusion 32 is, for example, 3 mm to 15 mm.
  • the width of the protrusion 32 (the outer diameter of the root portion) is, for example, 1 mm to 10 mm.
  • the electrode portion 30 is provided with a signal line portion 34 as a signal path connected to the conductive contact portion 33 .
  • Various wiring structures can be employed for the signal line portion 34 as long as they are in a manner that conducts through the base portion 31 and the projection portion 32 .
  • the signal line portion 34 is provided so as to pass from the conductive contact portion 33 at the tip of the protrusion 32 through the inside of the protrusion 32 and the base portion 31 and be exposed on the base upper surface 35 of the base portion 31 .
  • a portion of the signal line portion 34 protruding from the base upper surface 35 is a bent portion 34a that is sandwiched between the metal foil 60 and the electrode portion 30 (base upper surface 35) and bent.
  • the tip of the signal line portion 34 has a protruded structure, a structure that is substantially on the same plane, or a structure that is buried with respect to the tip portion of the protrusion 32 or its vicinity, that is, the region where the conductive contact portion 33 is formed.
  • a projecting structure may be used.
  • a projecting portion at the tip of the signal line portion 34 is partially or entirely covered with the conductive contact portion 33 .
  • the protruding structure of the tip of the signal line portion 34 may be unfolded, folded, or wrapped around the surface of the tip of the projection 32 .
  • the signal line portion 34 As another wiring structure of the signal line portion 34, a structure provided on the surface of the projection portion 32 and the base portion 31 may be used, or a wiring structure in which a portion is provided inside and a portion is provided on the surface. That is, the signal detected by the conductive contact portion 33 should be transmitted to the metal foil 60 and finally transmitted to the snap button 40 .
  • the electrode part 30 is a rubber-like elastic body as described above.
  • the rubber-like elastic body is rubber or a thermoplastic elastomer (also simply referred to as “elastomer (TPE)”).
  • TPE thermoplastic elastomer
  • examples of rubber include silicone rubber.
  • thermoplastic elastomers include styrene-based TPE (TPS), olefin-based TPE (TPO), vinyl chloride-based TPE (TPVC), urethane-based TPE (TPU), ester-based TPE (TPEE), amide-based TPE (TPAE), and the like.
  • rubber hardness A is the type A durometer hardness of the surface of the electrode portion 30 (the base portion 31 and the projection portion 32) measured in accordance with JIS K 6253 (1997) at 37°C.
  • 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 at 100 to 250° C. for 1 to 30 minutes (primary curing), followed by post-baking (secondary curing) at 100 to 200° C. for 1 to 4 hours. It is done by
  • An insulating silicone rubber is a silicone rubber that does not contain a conductive filler
  • a conductive silicone rubber is a silicone rubber that contains a conductive filler
  • the silicone rubber-based curable composition according to this 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 vinyl group-containing linear organopolysiloxane.
  • the vinyl group-containing linear organopolysiloxane of the same kind includes at least the same vinyl group with the same functional group and has a linear shape. can 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 contain a vinyl group-containing linear organopolysiloxane (A1) having a linear structure.
  • the vinyl group-containing linear organopolysiloxane (A1) has a linear structure and contains vinyl groups, and the vinyl groups serve as cross-linking points during curing.
  • the vinyl group content of the vinyl group-containing linear organopolysiloxane (A1) is not particularly limited, but for example, it preferably has two or more vinyl groups in the molecule and is 15 mol % or less. , 0.01 to 12 mol %.
  • the amount of vinyl groups in the vinyl group-containing linear organopolysiloxane (A1) is optimized, and a network can be reliably formed with each component described later.
  • " ⁇ " means including both numerical values.
  • the vinyl group content is the mol % of the vinyl group-containing siloxane units when the total units constituting the vinyl group-containing linear organopolysiloxane (A1) are taken as 100 mol %. .
  • one vinyl group is considered to be one vinyl group-containing siloxane unit.
  • the degree of polymerization of the vinyl group-containing linear organopolysiloxane (A1) is not particularly limited, it is, for example, preferably in the range of about 1,000 to 10,000, more preferably in the range of about 2,000 to 5,000.
  • the degree of polymerization can be determined, for example, as a polystyrene-equivalent number-average polymerization degree (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 heat resistance, flame retardancy, chemical stability, etc. of the resulting silicone rubber can be improved by using those having the degree of polymerization and specific gravity within the ranges described above. can be improved.
  • vinyl group-containing linear organopolysiloxane (A1) those having a structure represented by the following formula (1) are particularly preferable.
  • R 1 is a substituted or unsubstituted alkyl group, alkenyl group, aryl group, or a hydrocarbon group of a combination thereof having 1 to 10 carbon atoms.
  • the alkyl group having 1 to 10 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferred.
  • the alkenyl group having 1 to 10 carbon atoms includes, for example, vinyl group, allyl group, butenyl group, etc. Among them, vinyl group is preferred.
  • the aryl group having 1 to 10 carbon atoms includes, for example, a phenyl group.
  • R 2 is a substituted or unsubstituted alkyl group, alkenyl group, aryl group having 1 to 10 carbon atoms, or a hydrocarbon group combining these.
  • the alkyl group having 1 to 10 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferred.
  • alkenyl groups having 1 to 10 carbon atoms include vinyl groups, allyl groups and butenyl groups.
  • Examples of 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 combining these.
  • the alkyl group having 1 to 8 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferable.
  • Examples of the aryl group having 1 to 8 carbon atoms include a phenyl group.
  • examples of substituents for R 1 and R 2 in formula (1) include methyl group and vinyl group, and examples of substituents for R 3 include methyl group.
  • a plurality of R 1 are independent of each other and may be different or the same. Furthermore, the same applies to R 2 and R 3 .
  • m and n are the numbers of repeating units constituting the vinyl group-containing linear organopolysiloxane (A1) represented by formula (1), m is an integer of 0 to 2000, and n is 1000 to 10000. is an integer of m is preferably 0-1000 and n is preferably 2000-5000.
  • vinyl group-containing linear organopolysiloxane (A1) represented by formula (1) include, for example, those represented by the following formula (1-1).
  • R 1 and R 2 are each independently a methyl group or a vinyl group, and at least one is a vinyl group.
  • the vinyl group-containing linear organopolysiloxane (A1) a first vinyl group-containing vinyl group having a vinyl group content of 2 or more vinyl groups in the molecule and not more than 0.4 mol% 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 As crude 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 linear organopolysiloxane having a high vinyl group content were used.
  • the vinyl groups can be unevenly distributed, and the crosslink density can be more effectively formed in the crosslink network of the silicone rubber. As a result, the tear strength of silicone rubber can be increased more effectively.
  • the vinyl group-containing linear organopolysiloxane (A1) for example, a unit in which R 1 is a vinyl group and/or a unit in which R 2 is a vinyl group in the above formula (1-1) , a first vinyl group-containing linear organopolysiloxane (A1-1) having 2 or more in the molecule and containing 0.4 mol% or less, and a unit in which R 1 is a vinyl group and / or R It is preferable to use a second vinyl group-containing linear organopolysiloxane (A1-2) containing 0.5 to 15 mol % of units in which 2 is a vinyl group.
  • the first vinyl group-containing linear organopolysiloxane (A1-1) preferably has a vinyl group content of 0.01 to 0.2 mol %.
  • the second vinyl group-containing linear organopolysiloxane (A1-2) preferably has a vinyl group content of 0.8 to 12 mol %.
  • (A1-1) and (A1-2) are 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: 10 is more preferred.
  • the first and second vinyl group-containing linear organopolysiloxanes (A1-1) and (A1-2) may be used singly or in combination of two or more. good.
  • the vinyl group-containing organopolysiloxane (A) may also 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.
  • Cross-linking agents can include organohydrogenpolysiloxanes (B).
  • Organohydrogenpolysiloxane (B) is classified into linear organohydrogenpolysiloxane (B1) having a linear structure and branched organohydrogenpolysiloxane (B2) having a branched structure. Either or both may 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 should have at least a common structure such as a linear structure or a branched structure, and may contain different molecular weight distributions and different functional groups in the molecule, and the amount added may be different.
  • 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 the vinyl group-containing organopolysiloxane (A). It is a polymer that undergoes a hydrosilylation reaction with other vinyl groups and other vinyl groups contained in other components of the silicone rubber-based curable composition to crosslink these components.
  • the molecular weight of the linear organohydrogenpolysiloxane (B1) is not particularly limited, for example, the weight average molecular weight is preferably 20,000 or less, more preferably 1,000 or more and 10,000 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) does not have a vinyl group. Thereby, it is possible to accurately prevent the progress of the cross-linking reaction in the molecule of the linear organohydrogenpolysiloxane (B1).
  • linear organohydrogenpolysiloxane (B1) for example, one having a structure represented by the following formula (2) is preferably used.
  • R 4 is a substituted or unsubstituted alkyl group, alkenyl group, aryl group having 1 to 10 carbon atoms, a hydrocarbon group combining these groups, or a hydride group.
  • the alkyl group having 1 to 10 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferred.
  • alkenyl groups having 1 to 10 carbon atoms include vinyl groups, allyl groups and butenyl groups.
  • the aryl group having 1 to 10 carbon atoms include a phenyl group.
  • R 5 is a substituted or unsubstituted alkyl group, alkenyl group, aryl group having 1 to 10 carbon atoms, a hydrocarbon group combining these, or a hydride group.
  • alkyl group having 1 to 10 carbon atoms include methyl group, ethyl group and propyl group, with methyl group being preferred.
  • alkenyl groups having 1 to 10 carbon atoms include vinyl groups, allyl groups and butenyl groups.
  • Examples of the aryl group having 1 to 10 carbon atoms include a phenyl group.
  • a plurality of R 4 are independent of each other and may be different from each other or may be the same. The same is true for R5. However, at least two or more of the plurality of R 4 and R 5 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 combining these.
  • the alkyl group having 1 to 8 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferred.
  • Examples of the aryl group having 1 to 8 carbon atoms include a phenyl group.
  • a plurality of R 6 are independent from each other and may be different from each other or may be the same.
  • substituents for R 4 , R 5 and R 6 in formula (2) include methyl group and vinyl group, and methyl group is preferred from the viewpoint of preventing intramolecular cross-linking reaction.
  • m and n are the numbers of repeating units constituting the linear organohydrogenpolysiloxane (B1) represented by formula (2), m is an integer of 2 to 150, and n is an integer of 2 to 150. is.
  • m is an integer from 2-100 and n is an integer from 2-100.
  • the straight-chain organohydrogenpolysiloxane (B1) may be used alone or in combination of two or more.
  • the branched organohydrogenpolysiloxane (B2) has a branched structure, it is a component that forms regions with a high crosslink density and greatly contributes to the formation of a loose and dense structure of 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 undergoes a hydrosilylation reaction with the vinyl groups of the components blended in the rubber-based curable composition to crosslink these components.
  • the specific gravity of the branched organohydrogenpolysiloxane (B2) is in the range of 0.9 to 0.95.
  • the branched organohydrogenpolysiloxane (B2) does not have a vinyl group. Thereby, it is possible to accurately prevent the progress of the cross-linking reaction in the molecule of the branched organohydrogenpolysiloxane (B2).
  • branched organohydrogenpolysiloxane (B2) one represented by the following average compositional formula (c) is preferable.
  • R 7 is a monovalent organic group, a is an integer ranging from 1 to 3, m is the number of H a (R 7 ) 3-a SiO 1/2 units, n is SiO 4/ 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 combining these.
  • the alkyl group having 1 to 10 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferred.
  • Examples of the 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.
  • m is the number of H a (R 7 ) 3-a SiO 1/2 units
  • n is the number of SiO 4/2 units.
  • the 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.
  • the number of bound alkyl groups R (R/Si) is 1.8 to 2.1 for the linear organohydrogenpolysiloxane (B1) and 0.8 to 1 for the branched organohydrogenpolysiloxane (B2). .7 range.
  • the branched organohydrogenpolysiloxane (B2) has a branched structure, for example, when heated to 1000° C. at a heating rate of 10° C./min in a nitrogen atmosphere, the residual amount is 5% or more. becomes.
  • the straight-chain organohydrogenpolysiloxane (B1) is straight-chain, the amount of residue after heating under the above conditions is almost zero.
  • branched organohydrogenpolysiloxane (B2) include those having a structure represented by the following formula (3).
  • R 7 is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, a hydrocarbon group combining these, or a hydrogen atom.
  • the alkyl group having 1 to 8 carbon atoms includes, for example, methyl group, ethyl group, propyl group, etc. Among them, methyl group is preferable.
  • Examples of the aryl group having 1 to 8 carbon atoms include a phenyl group.
  • the substituent of R7 include a methyl group and the like.
  • a plurality of R 7 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.
  • linear organohydrogenpolysiloxane (B1) and branched organohydrogenpolysiloxane are The total amount of hydride groups in the siloxane (B2) is preferably from 0.5 to 5 mol, more preferably from 1 to 3.5 mol.
  • the silicone rubber-based curable composition according to this embodiment contains a non-conductive filler.
  • the non-conductive filler may contain silica particles (C) as needed. Thereby, 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.
  • Non-conductive fillers of the same type may have at least common constituent materials, and may differ in particle size, specific surface area, surface treatment agent, or addition amount 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, etc. are used. These may be used alone or in combination of two or more.
  • the silica particles (C) preferably have a BET specific surface area of, for example, 50 to 400 m 2 /g, more preferably 100 to 400 m 2 /g. Also, the average primary particle size of the silica particles (C) is, for example, preferably 1 to 100 nm, more preferably about 5 to 20 nm.
  • silica particles (C) having a specific surface area and an average particle size within the above ranges, the hardness and mechanical strength of the formed silicone rubber can be improved, especially the tensile strength can be improved.
  • the silicone rubber-based curable composition of the present embodiment can contain a silane coupling agent (D).
  • Silane coupling agent (D) can have a hydrolyzable group. The hydrolyzable group is hydrolyzed with water to form a hydroxyl group, and the hydroxyl group undergoes a dehydration condensation reaction with the hydroxyl group on the surface of the silica particle (C), thereby modifying the surface of the silica particle (C).
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same type of silane coupling agent.
  • the silane coupling agents of the same kind should have at least a common functional group, and may differ in other functional groups in the molecule and in the amount added.
  • 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.
  • the hydrophobic group is imparted to the surface of the silica particles (C), so that the cohesive force of the silica particles (C) in the silicone rubber-based curable composition and further in the silicone rubber is reduced (hydrogen 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. This increases the interface between the silica particles (C) and the rubber matrix, increasing the reinforcing effect of the silica particles (C).
  • the slipperiness of the silica particles (C) within the matrix is improved when the rubber matrix is deformed.
  • the improved dispersibility and slipperiness of the silica particles (C) improve the mechanical strength (for example, tensile strength and tear strength) of the silicone rubber due to the silica particles (C).
  • the silane coupling agent (D) can contain a silane coupling agent having a vinyl group.
  • vinyl groups are introduced onto the surfaces of the silica particles (C). Therefore, during curing of the silicone rubber-based curable composition, that is, a hydrosilylation reaction occurs between the vinyl group of the vinyl group-containing organopolysiloxane (A) and the hydride group of the organohydrogenpolysiloxane (B). , When a network (crosslinked structure) is formed by these, the vinyl groups possessed by the silica particles (C) also participate in the hydrosilylation reaction with the hydride groups possessed by the organohydrogenpolysiloxane (B). Silica particles (C) also come to be taken in. 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 1-3.
  • Y represents a 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 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 having a combination thereof, and examples thereof include a methyl group, an ethyl group, a propyl group, a phenyl group, and the like. Methyl groups are preferred.
  • the hydrophilic group includes, for example, a hydroxyl group, a sulfonic acid group, a carboxyl group, a carbonyl group, etc. 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).
  • the hydrolyzable group includes an alkoxy group such as a methoxy group and an ethoxy group, a chloro group, a silazane group, and the like.
  • a silazane group is preferable because of its high reactivity with the silica particles (C).
  • a compound having a silazane group as a hydrolyzable group has two structures of (Y n —Si—) in the above formula (4) due to its structural characteristics.
  • silane coupling agent (D) represented by the above formula (4) are as follows.
  • Those having a hydrophobic group as the functional group include, for example, methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, n-propyltrimethoxysilane, alkoxysilanes such as n-propyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, decyltrimethoxysilane; chlorosilanes such as methyltrichlorosilane, dimethyldichlorosilane, trimethylchlorosilane, phenyltrichlorosilane; hexamethyldisilazane.
  • silane coupling agent having a trimethylsilyl group containing one or more selected from the group consisting of hexamethyldisilazane, trimethylchlorosilane, trimethylmethoxysilane, and trimethylethoxysilane is preferred.
  • Examples of those having a vinyl group as the functional group include methacryloxypropyltriethoxysilane, methacryloxypropyltrimethoxysilane, methacryloxypropylmethyldiethoxysilane, methacryloxypropylmethyldimethoxysilane, vinyltriethoxysilane, and vinyltrimethoxysilane.
  • alkoxysilanes such as silane and vinylmethyldimethoxysilane
  • chlorosilanes such as vinyltrichlorosilane and vinylmethyldichlorosilane
  • divinyltetramethyldisilazane divinyltetramethyldisilazane.
  • a silane coupling agent having a vinyl group-containing organosilyl group containing one or more selected from the group consisting of methyldimethoxysilane is preferred.
  • silane coupling agent (D) contains two kinds of a silane coupling agent having a trimethylsilyl group and a silane coupling agent having a vinyl group-containing organosilyl group
  • those having a hydrophobic group include hexamethyldisilazane, Divinyltetramethyldisilazane is preferably included as one having a vinyl group.
  • the ratio of (D1) and (D2) is not particularly limited, but for example, (D1):(D2) in a weight ratio of 1:0.001 to 1:0.35, preferably 1:0.01 to 1:0.20, more preferably 1:0.03 to 1:0 .15. Desired physical properties of the silicone rubber can be obtained by setting it to such a numerical range. Specifically, the dispersibility of silica in the rubber and the crosslinkability of the rubber can be balanced.
  • 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 at least 5% by mass, even more preferably at least 5% by mass.
  • the upper limit of the content of the silane coupling agent (D) is preferably 100% by mass or less, and 80% by mass or less with respect to 100 parts by weight of the total amount of the vinyl group-containing organopolysiloxane (A). It is more preferable that the content is 40% by mass or less.
  • the silicone rubber can have appropriate mechanical properties.
  • the silicone rubber-based curable composition according to this embodiment may contain a catalyst.
  • the catalyst may contain platinum or a platinum compound (E).
  • Platinum or a platinum compound (E) is a catalytic component that acts as a catalyst during curing.
  • the amount of platinum or platinum compound (E) added is a catalytic amount.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may contain the same type of catalyst. Catalysts of the same kind may have at least common constituent materials, and the catalysts may contain different compositions and may differ in addition amount.
  • the insulating silicone rubber-based curable composition and the conductive silicone rubber-based curable composition may further contain different catalysts.
  • platinum or platinum compound (E) a known one can be used, for example, platinum black, platinum supported on silica or carbon black, chloroplatinic acid or an alcohol solution of chloroplatinic acid, A complex salt of platinic acid and olefin, a complex salt of chloroplatinic acid and vinyl siloxane, and the like are included.
  • the platinum or platinum compound (E) may be used alone or in combination of two or more.
  • the content of platinum or platinum compound (E) in the silicone rubber-based curable composition means the amount of catalyst, and can be set as appropriate.
  • (A), silica particles (C), the total amount of 100 parts by weight of the silane coupling agent (D), platinum group metal is an amount of 0.01 to 1000 ppm by weight unit, 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) is a component that functions as a dispersion medium for dispersing each component contained in the silicone rubber-based curable composition and contributes to the reaction between the silica particles (C) and the silane coupling agent (D). . Therefore, the silica particles (C) and the silane coupling agent (D) can be linked to each other more reliably in the silicone rubber, and uniform properties 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.
  • additives such as inorganic fillers, reaction inhibitors, dispersants, pigments, dyes, antistatic agents, antioxidants, flame retardants, and thermal conductivity improvers.
  • the conductive solution (conductive silicone rubber composition) according to the present embodiment contains the conductive filler and solvent in addition to the silicone rubber-based curable composition containing no conductive filler.
  • solvents can be used as the solvent, and for example, a high boiling point solvent can be included. These may be used alone or in combination of two or more.
  • solvents examples include aliphatic hydrocarbons such as pentane, hexane, cyclohexane, heptane, methylcyclohexane, ethylcyclohexane, octane, decane, dodecane, and tetradecane; benzene, toluene, ethylbenzene, xylene, 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; haloalkanes such as
  • the conductive solution can have a viscosity suitable 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 part 30 is the silica particles (C) and the conductive filler.
  • it is 1% by mass or more, preferably 3% by mass or more, and more preferably 5% by mass or more, relative to the total amount of 100% by mass.
  • the upper limit of the content of the silica particles (C) contained in the electrode part 30 is, for example, 20% by mass or less with respect to the total amount of 100% by mass of the silica particles (C) and the conductive filler, It is preferably 15% by mass or less, more preferably 10% by mass or less. Thereby, it is possible to achieve a balance between conductivity, mechanical strength, and flexibility in the electrode portion 30 .
  • a conductive silicone rubber can be obtained by heating and drying the conductive solution as necessary.
  • the conductive silicone rubber may be configured without silicone oil. As a result, it is possible to suppress deterioration in conductivity due to bleeding out of the silicone oil onto the surface of the electrode portion 30 .
  • the signal line portion 34 can use a known one, and can be made of conductive fiber, for example.
  • 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 fibers and metal-coated fibers is not limited as long as it has conductivity, but copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, stainless steel, aluminum, silver/chloride 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. Moreover, it is preferable that the metal material does not contain a metal such as chromium that causes a load on the environment.
  • the fiber materials of the metal-coated fibers, conductive polymer-coated fibers, and conductive paste-coated fibers are not particularly limited, but may be synthetic fibers, semi-synthetic fibers, or natural fibers. 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 such as polythiophene, polypyrrole, polyaniline, polyacetylene, polyphenylene vinylene, polynaphthalene, and derivatives thereof and a binder resin, Alternatively, an aqueous solution of a conductive polymer such as PEDOT-PSS ((3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid)) is used.
  • PEDOT-PSS ((3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid)
  • the resin material contained in the conductive paste of the conductive paste-coated fiber is not particularly limited, but preferably has elasticity. It can contain one or more selected from the group consisting of propylene rubbers. 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, and known conductive materials may be used, such as metal particles, metal fibers, metal-coated fibers, carbon black, acetylene black, graphite, carbon It may contain 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 for example, copper, silver, gold, nickel, tin, lead, zinc, bismuth, antimony, silver/silver chloride, or at least one of these alloys. or, alternatively, two or more of these.
  • silver or copper is preferable because of its high conductivity and high availability.
  • the signal line portion 34 may be composed of twisted yarn obtained by twisting a plurality of linear conductive fibers. As a result, breakage of the signal line portion 34 during deformation can be suppressed.
  • the coating of the conductive fiber means not only covering the outer surface of the fiber material, but also, in the case of a twisted yarn obtained by twisting single fibers, a metal or a conductive polymer is added between the fibers in the twisted yarn. , or impregnated with a conductive paste to cover each single fiber constituting the twisted yarn.
  • the tensile elongation at break of the signal wire portion 34 is, for example, 1% to 50%, preferably 1.5% to 45%. By setting the value within such a numerical range, it is possible to suppress excessive deformation of the protrusion 32 while suppressing breakage during deformation.
  • the conductive member of the conductive contact portion 33 is, for example, a paste containing a highly conductive metal (so-called conductive paste).
  • the highly conductive metal includes 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 suitable from the viewpoint of availability and conductivity.
  • the conductive contact portion 33 is formed with a paste containing a highly conductive metal
  • the top of the protrusion 32 made of a rubber-like elastic body is dipped (immersed) in a paste-like conductive solution containing a highly conductive metal. Apply). Thereby, a conductive contact portion 33 is formed on the surface of the projection portion 32 .
  • the conductive contact portion 33 may be formed as a conductive resin layer by applying a conductive solution containing a conductive filler and a solvent to the projection portion 32 . At this time, by using the same type of material (silicone rubber) as the solvent for the protrusion 32, the adhesion of the conductive contact portion 33 (conductive resin layer) can be enhanced.
  • a conductive silicone rubber can be obtained by heating and drying the conductive solution as necessary.
  • the conductive silicone rubber may be configured without silicone oil. As a result, it is possible to suppress a decrease in conductivity due to bleeding out of the silicone oil onto the surface of the conductive contact portion 33 .
  • An example of the method for manufacturing the electrode part 30 of this embodiment can include the following steps. First, using a mold, the silicone rubber-based curable composition is molded under heat and pressure to obtain a molded body comprising the base portion 31 and the projection portion 32 . Subsequently, the signal wire portion 34 is threaded through each projection portion 32 of the obtained molding using a sewing needle. A pasty conductive solution is dip-coated on the tip portion of the protruding portion 32 of the molded body obtained thereafter, and post-curing is performed after heating and drying. Thereby, the conductive contact portion 33 can be formed on the projection portion 32 .
  • the electrode part 30 can be manufactured by the above. During the molding process, insert molding may be used in which the silicone rubber-based curable composition is introduced into the molding space in which the signal line portion 34 is arranged, and pressurized and heat-molded.
  • the cap 50 is made of, for example, a hard resin material and has a cylindrical shape with a bottom.
  • the cap 50 functions as a holder that accommodates and holds the electrode section 30 , the snap button 40 and the metal foil 60 inside.
  • the electrode section 30 , the snap button 40 and the metal foil 60 are stacked and accommodated, and are compressed and fixed inside the cap 50 in the thickness direction (vertical direction in the drawing) by the pressing section 56 .
  • the bottom surface of the bottomed cylindrical shape of the cap 50 serves as a cap top plate 51 .
  • a cylindrical cap body portion 52 is integrally provided on the peripheral edge of the cap top plate 51 .
  • the cap inner peripheral surface 55 of the cap barrel 52 is formed slightly larger than the base 31 of the electrode section 30, and the outer surface of the base 31 is in contact with the cap inner peripheral surface 55 when the electrode section 30 is accommodated. are set apart.
  • a central opening 53 penetrating in the thickness direction is provided at the center of the circular cap top plate 51 .
  • the size of the central opening 53 is such that at least the button portion 42 of the snap button 40 can protrude from the inside to the outside when the snap button 40 is accommodated in the cap 50 .
  • a holding portion 56 is formed that extends toward the inner side of the cylinder by a predetermined length.
  • the position of the pressing portion 56 in the thickness direction is slightly shallower than the total thickness of the components housed inside the cap 50 (here, the snap button 40, the metal foil 60, and the electrode portion 30). .
  • the pressing portion 56 moves the vicinity of the outer edge of the base lower surface 36 of the base portion 31 of the electrode portion 30 in the thickness direction (cylinder depth direction). ) while compressing.
  • the electrode portion 30 held by the cap 50 that is, with the pressing portion 56 pressing the base portion 31 , the base portion 31 is compressed in a range of 1% or more and 10% or less.
  • the pressing portions 56 may be provided over the entire circumferential direction, or may be provided in a hook shape at a plurality of locations at predetermined intervals in the circumferential direction. It should be noted that the electrode portion 30 is fitted into the cap 50 by arranging the snap button 40 and the metal foil 60 inside the cap 50 and then pushing it in. As shown in FIG. From the viewpoint of preventing a portion of the electrode portion 30 from floating during use in the fitted state, it is preferable that the pressing portion 56 is provided over the entire circumferential direction.
  • the snap button 40 is made of a conductive member and functions as an interface for connecting the signal of the electrode section 30 to an external measuring section.
  • conductive members include conductive metals such as stainless steel, copper alloys, and aluminum alloys.
  • the snap button 40 has a circular disc portion 41 with a predetermined thickness and a cylindrical button portion 42 extending upward from the center of the disc top surface 43 of the disc portion 41 .
  • the disc lower surface 44 of the disc portion 41 is connected to the metal foil 60 .
  • a disc upper surface 43 of the disc portion 41 abuts on the top plate lower surface 54 of the cap top plate 51 of the cap 50 , more specifically, the area near the central opening 53 .
  • the disk portion 41 has a structure in which the bent portion 34 a of the signal line portion 34 is sandwiched between the metal foil 60 and the base upper surface 35 of the electrode portion 30 .
  • the metal foil 60 is provided between the electrode portion 30 and the snap button 40, and is configured as part of the signal path by being conductive and being compressed and deformed.
  • the metal foil 60 has at least a size and shape that can sandwich the bent portions 34a of all the signal line portions 34 when placed and fixed between the electrode portion 30 and the snap button 40.
  • the metal foil 60 is, for example, a foil of aluminum, copper (including alloys thereof), or stainless steel. Aluminum or stainless steel is preferable in consideration of the difficulty of internal maintenance after the electroencephalogram measurement electrode 10 is assembled and deterioration due to sweat on the scalp.
  • the thickness of the metal foil 60 is, for example, 1 ⁇ m to 100 ⁇ m.
  • the snap button 40 is accommodated from the opening on the lower side of the cap body portion 52 of the cap 50, with the button portion 42 facing upward in the figure.
  • the peripheral edge portion of the disc upper surface 43 contacts the opening edge portion of the central opening 53 of the top plate lower surface 54 .
  • the button portion 42 penetrates the central opening portion 53 of the cap 50 and protrudes to the outside.
  • the metal foil 60 is accommodated so as to abut against the disk lower surface 44 of the snap button 40 .
  • the electrode part 30 is arranged so that the base upper surface 35 is pressed against the metal foil 60 .
  • the electrode part 30 is fitted from the lower opening of the cap 50 .
  • the pressing portion 56 compresses the outer edge portion 38 of the base portion 31 of the electrode portion 30 in the thickness direction.
  • the snap button 40, the metal foil 60 and the electrode portion 30 are accommodated in the cylinder of the cap 50 in a compressed state.
  • Electroencephalogram measurement electrode 10 A columnar base 31 formed of an elastic member, a plurality of projections 32 (electrode projections) provided at one end of the base 31 (that is, the lower surface 36 of the base), and at least the tip side surface of the projections 32.
  • a snap button 40 (conductive snap button 40) is provided at the other end of the base portion 31 (base upper surface 35) via a metal foil 60 and has a button portion 42 (connection projection) extending in the direction opposite to the base portion 31. connection member); and a cap 50 (holder) that holds the electrode part 30,
  • the cap 50 has a cylindrical shape with a bottom, and the button portion 42 of the snap button 40 is held in a state in which the electrode portion 30 is provided on the bottom surface (cap top plate 51) of the cylindrical shape with a bottom (cap top plate 51).
  • the pressing portion 56 compresses the outer edge portion 38 of the surface of the base portion 31 on which the projection portion 32 is provided (base portion lower surface 36 ) in the thickness direction of the base portion 31 . Since the base portion 31 of the electrode portion 30 is compressed in the thickness direction and accommodated in the cap 50, a good electrical connection can be maintained. (3) The compressibility of the base portion 31 of the electrode portion 30 held by the cap 50 is 1% or more and 10% or less based on the removed state. By compressing the base portion 31 with a compression ratio within the above range and holding the electrode portion 30 in the cap 50, a balance between the electrical connection state and the holding force can be ensured. (4) The elastic member forming the electrode portion 30 is made of silicone resin.
  • the signal line portion 34 is made of a conductive fiber, protrudes from the other end (base upper surface 35) of the base portion 31, and is bent while being held by the cap 50 of the base portion 31 of the electrode portion 30, It is electrically connected with the snap button 40 via the metal foil 60 .
  • the portion (that is, the bent portion 34a) of the signal line portion 34 of the conductive fiber protruding from the base upper surface 35 is sandwiched between the metal foil 60 and the base upper surface 35, and the snap button 40 presses them.
  • a signal from the signal line portion 34 can be reliably transmitted to the snap button 40.
  • the cap 50 is made from one piece of material.
  • the electroencephalogram measurement device 1 includes an electroencephalogram measurement electrode 10, a frame 20 that holds a plurality of the electroencephalogram measurement electrodes 10, and a measurement unit that is connected via a snap button 40 and measures a measured electroencephalogram signal. , has (8) The electroencephalogram measurement method includes attaching the electroencephalogram measurement device 1 to the subject's head 99 and performing electroencephalogram measurement.
  • FIG. 5 is a cross-sectional view schematically showing the electroencephalogram measurement electrode 110.
  • the metal foil 60 is omitted, the snap button 40 is directly arranged on the electrode section 30, and the bent portion 34a of the signal line section 34 is formed between the snap button 40 and the electrode section 30 (more specifically, the electrode section 30). is directly sandwiched between the base portion upper surface 35).
  • the number of components can be reduced, and an increase in contact resistance due to deterioration of the metal foil 60 can be suppressed.
  • FIG. 6 is a cross-sectional view schematically showing the electroencephalogram measurement electrode 210.
  • the one-piece cap 50 of the first embodiment is replaced with a cap 250 of a plurality of pieces (here, two parts).
  • the cap 250 includes a first cap 250A and a second cap 250B.
  • the electrode section 30, the snap button 40 and the metal foil 60 are accommodated inside the cap 250 and compressed and fixed.
  • the first cap 250A has a cap top plate 51 and a cylindrical first trunk portion 251 extending downward in the drawing from the lower end of the outer edge of the cap top plate 51 .
  • the outer peripheral surface of the first body portion 251 is threaded.
  • the second cap 250B has a tubular second body portion 252 and a pressing portion 56 provided at the lower end thereof.
  • the inner peripheral surface of the second body portion 252 is threaded.
  • the cap 250 is composed of a plurality of pieces (here, two parts of the first cap 250A and the second cap 250B). By screw-fitting the second cap 250B to the second cap 250B, it is compressed and fixed, so the degree of compression can be adjusted. Further, unlike the first embodiment, it is not necessary to strongly fit the electrode section 30 against the holding portion 56, and therefore the size of the holding portion 56 is not limited.
  • FIG. 7 is a perspective view of the electroencephalogram measurement electrode 310.
  • the electroencephalogram measurement electrode 310 of this embodiment is composed of two parts, a first cap 350A and a second cap 350B, as in the third embodiment. A different point is that hook fitting is used as a structure for fitting and fixing the first cap 350A and the second cap 350B.
  • the first cap 350A has a cap top plate 51 and a tubular first barrel portion 351 extending downward in the figure from the lower end of the outer edge of the cap top plate 51 .
  • a hook-shaped male hook portion 351A is provided at the lower end portion of the first body portion 351 in the drawing.
  • the second cap 350B has a tubular second body portion 352 and a pressing portion 56 provided at the lower end thereof.
  • An upper end portion of the second trunk portion 252 is provided with a concave female hook portion 352B into which the male hook portion 351A can be fitted.
  • the male hook portion 351A and the female hook portion 352B are provided at a plurality of locations, for example, four locations from the viewpoint of appropriately compressing and fixing the accommodated electrode portion 30 and the like.
  • the size of the holding section 56 is not limited.
  • FIG. 8 is a cross-sectional view schematically showing the electroencephalogram measurement electrode 410.
  • a recessed fitting portion 437 is provided on the peripheral surface of the base portion 31 of the electrode portion 430 over the entire circumference.
  • the holding portion 56 provided at the lower end portion of the cap body portion 52 of the cap 450 is fitted into the fitting portion 437 .
  • the electrode section 30 , the metal foil 60 and the snap button 40 are compressed and fixed to the cap 50 .
  • the compressibility at the time of compression fixation is smaller than that of the first embodiment, but the cap 450 can be made compact in the thickness direction.
  • FIG. 9 is a cross-sectional view schematically showing the electroencephalogram measurement electrode 510.
  • the peripheral surface of the base portion 31 of the electrode portion 530 is stepped. That is, the base portion 31 has a large diameter on the upper side in the thickness direction and a small diameter on the lower side, and the boundary surface 357 is pressed by the pressing portion 556 . With such a configuration, the cap 550 can be made compact.
  • FIG. 10 is a cross-sectional view schematically showing the electroencephalogram measurement electrode 610.
  • the cap 650 is made up of a plurality of pieces with a snap-fit fitting structure.
  • the structure of the electrode part 30, the snap button 40, etc. accommodated inside the cap 650 can provide the same structure as the above-described embodiment, and the cap 650 will be described below.
  • the cap 650 has a tubular first cap 650A and a tubular second cap 650B fitted in the tubular of the first cap 650A.
  • the first cap 650A and the second cap 650B are integrally fitted with a snap-fit fitting structure, so that the electrode section 30 and the snap button 40 are accommodated inside the cap 650 and are compressed and fixed.
  • a metal foil may be provided between the electrode portion 30 and the snap button 40 as in the third to fifth embodiments.
  • the first cap 650A has a cylindrical cap body 652A and a pressing part 656A provided at the lower end thereof.
  • the upper region of the cap inner peripheral surface 655A of the cap barrel 652A forms a storage space 658A that is slightly enlarged in diameter to accommodate the second cap 650B.
  • a lower portion of the accommodation space 658A is a recessed locking groove 657A in which the locking piece 657B of the second cap 650B is received and locked during snap-fitting.
  • the second cap 650B has an annular cap top plate 651B having a central opening 653B, and a locking piece 657B extending downward in the drawing from the outer peripheral edge of the annular cap top plate 651B.
  • the locking piece 657B has a substantially cylindrical shape and is elastically deformable in the cylinder inner direction.
  • the lower end portion of the locking piece 657B in the drawing has a shape protruding outward like a hook.
  • the tubular shape may be vertically divided into a plurality of pieces (for example, into three or four pieces).
  • the size of the inner peripheral surface 655B of the second cap 650B (that is, the plurality of locking pieces 657B) is approximately the same as the outer diameter of the base portion 31 of the electrode portion 30.
  • the pressing portion 656A of the first cap 650A presses the outer edge portion 38 of the lower surface of the base portion 31 of the electrode portion 30 from below in the drawing.
  • the top plate lower surface 654B of the second cap 650B presses the disc upper surface 43 of the snap button 40 .
  • the electrode part 30 and the snap button 40 are housed and fixed in the cap 650 in a state of being compressed in the thickness direction.
  • the cap body 652A may be provided with a hole penetrating from the outer peripheral surface to the locking groove 657A.
  • the first cap 650A and the second cap 650B of the cap 650 have a snap-fit fitting structure, so that the electrode section 30 and the snap button 40 can be housed inside to assemble the electroencephalogram measurement electrode 610. It can make your work easier. Moreover, since the structure is simple, it is easy to reduce the size of the electroencephalogram measurement electrode 610, and the weight of the electroencephalogram measurement electrode 610 can be reduced.
  • Electroencephalogram measurement device 10 110, 210, 310, 410, 510, 610 electroencephalogram measurement electrode 20 frame 21 electrode unit mounting portion 30, 430, 530 electrode portion 31 base portion 32 projection portion 33 conductive contact portion 34 signal line portion 34a Bent portion 35 Base upper surface 36 Base lower surface 37 Peripheral surface 38 Outer edge portion 40 Snap button 41 Disk portion 42 Button portion 43 Disk upper surface 44 Disk lower surface 50, 250, 350, 450, 550, 650 Cap 51, 651B Cap top plate 52, 652A Cap trunk portion 53 Central opening portion 54 Top plate lower surface 55 Cap inner peripheral surface 56, 456, 556, 656A Pressing portion 60 Metal foil 70 Mold resin 250A, 350A, 650A First cap 250B, 350B, 650B Second cap 251, 351 First barrel portions 252, 352 Second barrel portion 351A Male hook portion 352B Female hook portion 437 Fitting portion 655B Inner peripheral surface 657A Locking groove 657B Locking piece 658A Accommodation space

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Abstract

L'invention concerne une électrode de mesure d'onde cérébrale (10), comprenant : une partie électrode (30) ayant une section de base en colonne (31) qui est un élément élastique, une pluralité de sections de saillie (32) disposées sur une surface inférieure de section de base (36), des sections de contact conductrices (33) disposées respectivement sur la surface latérale d'extrémité avant des sections de saillie (32), et une section de ligne de signal (34) s'étendant à partir des sections de contact conductrices (33) à une surface supérieure de section de base (35) ; un bouton-pression (40) comprenant une section de bouton (42) qui est disposée sur la surface supérieure de section de base (35) avec une feuille métallique (60) entre celles-ci et s'étend dans une direction opposée à la section de base (31) ; et un support (50) qui maintient la partie électrode (30). Le support (50) a un fond de forme cylindrique, et comporte : une partie d'ouverture centrale (53) qui est disposée sur une plaque supérieure d'espace (51) à partir de laquelle la section de bouton (42) du bouton-pression (40) fait saillie tandis que la partie électrode (30) est maintenue par le support (50) ; et une partie de poussée (56) qui pousse la partie d'électrode (30) dans la direction d'épaisseur de la section de base (31) sur une section d'extrémité opposée à la plaque supérieure d'espace (51).
PCT/JP2022/001068 2021-01-27 2022-01-14 Électrode de mesure d'onde cérébrale, dispositif de mesure d'onde cérébrale et procédé de mesure d'onde cérébrale WO2022163382A1 (fr)

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JP2014057642A (ja) * 2012-09-14 2014-04-03 Sony Corp 生体信号測定電極及び生体信号測定装置
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US20050261559A1 (en) * 2004-05-18 2005-11-24 Mumford John R Wireless physiological monitoring system
JP2011120866A (ja) * 2009-11-10 2011-06-23 Japan Health Science Foundation 脳波測定用電極、脳波測定用電極付きキャップ及び脳波測定装置
JP2014057642A (ja) * 2012-09-14 2014-04-03 Sony Corp 生体信号測定電極及び生体信号測定装置
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WO2019073740A1 (fr) * 2017-10-10 2019-04-18 Nok株式会社 Bioélectrode de détection d'ondes cérébrales
WO2020095589A1 (fr) * 2018-11-09 2020-05-14 住友ベークライト株式会社 Électrode biologique, capteur biologique et système de mesure de signal biologique

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