WO2024029446A1 - 生体用電極 - Google Patents

生体用電極 Download PDF

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Publication number
WO2024029446A1
WO2024029446A1 PCT/JP2023/027555 JP2023027555W WO2024029446A1 WO 2024029446 A1 WO2024029446 A1 WO 2024029446A1 JP 2023027555 W JP2023027555 W JP 2023027555W WO 2024029446 A1 WO2024029446 A1 WO 2024029446A1
Authority
WO
WIPO (PCT)
Prior art keywords
biological electrode
core materials
protrusion
support member
electrode according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/027555
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English (en)
French (fr)
Japanese (ja)
Inventor
真之 久保
泰成 林
隆浩 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nok Corp
Original Assignee
Nok Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nok Corp filed Critical Nok Corp
Priority to US18/994,935 priority Critical patent/US20250387060A1/en
Priority to CN202380053755.5A priority patent/CN119584921A/zh
Priority to JP2024539116A priority patent/JP7826491B2/ja
Priority to EP23850001.1A priority patent/EP4566538A4/en
Publication of WO2024029446A1 publication Critical patent/WO2024029446A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
    • A61B5/268—Bioelectric electrodes therefor characterised by the electrode materials containing conductive polymers, e.g. PEDOT:PSS polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0209—Special features of electrodes classified in A61B5/24, A61B5/25, A61B5/283, A61B5/291, A61B5/296, A61B5/053
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/12—Manufacturing methods specially adapted for producing sensors for in-vivo measurements
    • A61B2562/125—Manufacturing methods specially adapted for producing sensors for in-vivo measurements characterised by the manufacture of electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
    • A61B2562/164—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted in or on a conformable substrate or carrier
    • 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
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • 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
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
    • 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
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/296—Bioelectric electrodes therefor specially adapted for particular uses for electromyography [EMG]

Definitions

  • the present disclosure relates to a biological electrode.
  • a bioelectrode that is attached to the surface of the living body is generally used.
  • the biological electrode described in Patent Document 1 includes a plate-shaped portion and a plurality of protrusions protruding from the plate-shaped portion. These are made of insulating elastic members.
  • the tip of each projection is covered with a conductive resin layer.
  • a conductive wire electrically connected to the conductive resin layer is arranged inside each protrusion. This conductive wire is composed of conductive fibers.
  • a biological electrode includes a sheet-like or plate-like base having a first surface and a second surface facing in a direction opposite to the first surface; a plurality of protrusions protruding from a second surface, an electrode member made of an elastic material having conductivity, and provided corresponding to two or more of the plurality of protrusions; A plurality of core materials made of a material having a higher Young's modulus than the elastic material, and a tip of each of the plurality of core materials is located halfway in the corresponding protrusion in the protrusion direction.
  • FIG. 1 is an exploded perspective view of the biological electrode of the first embodiment.
  • FIG. 2 is a side view of the biological electrode of the first embodiment.
  • FIG. 2 is a bottom view of the biological electrode of the first embodiment.
  • 4 is a sectional view taken along line AA in FIG. 3.
  • FIG. 2 is an exploded perspective view of a biological electrode according to a second embodiment.
  • FIG. 3 is a cross-sectional view of a biological electrode according to a second embodiment.
  • FIG. 7 is an exploded perspective view of a biological electrode according to a third embodiment.
  • FIG. 7 is a cross-sectional view of a biological electrode according to a third embodiment. It is a figure which shows the example of use of a biological electrode.
  • FIG. 1 is an exploded perspective view of a biological electrode 1 according to a first embodiment.
  • FIG. 2 is a side view of the biological electrode 1 of the first embodiment.
  • FIG. 3 is a bottom view of the biological electrode 1 of the first embodiment.
  • FIG. 4 is a cross-sectional view taken along line AA in FIG.
  • the biological electrode 1 is an electrode for detecting potential changes in a living body such as a human or an animal as a biological signal.
  • the biological electrode 1 is used in a state in which it is in contact with the surface of a living body to be detected.
  • the biological electrode 1 is suitably used, for example, to measure brain waves while in contact with the scalp.
  • a measuring device that generates biological information such as brain waves based on biological signals from the biological electrode 1 is electrically connected to the biological electrode 1 .
  • the living body to be detected may be referred to as a subject.
  • the use of the biological electrode 1 is not limited to the measurement of brain waves, but may also be used to measure biological information such as an electrocardiogram or an electromyogram. Therefore, the part of the living body to which the biological electrode 1 is brought into contact is not limited to the scalp, but may be, for example, the arm, leg, chest, or back, and may not be a part where hair grows. Furthermore, the use of the biological electrode 1 is not limited to the use of detecting biological signals, but may also be used, for example, to provide electrical stimulation to a living body.
  • the biological electrode 1 includes a support member 10, an electrode member 20, a connector 30, and a core group 60.
  • a support member 10 As shown in FIG. 1, the biological electrode 1 includes a support member 10, an electrode member 20, a connector 30, and a core group 60.
  • each part of the biological electrode 1 will be explained in order.
  • the support member 10 is a member that supports the electrode member 20.
  • the support member 10 is made of an insulating material, that is, a dielectric material.
  • the insulating material include polymers such as silicone rubber, urethane rubber, fluororubber, and ethylene-propylene-diene ternary copolymer rubber (EPDM).
  • EPDM ethylene-propylene-diene ternary copolymer rubber
  • the insulating material is preferably the same type of polymer as the polymer constituting the electrode member 20.
  • the support member 10 has a disk shape.
  • the support member 10 has a pair of plate surfaces 10a and 10b, a through hole 10c, and a plurality of notches 10d.
  • the plate surface 10a is a surface that supports the electrode member 20.
  • the plate surface 10b is a surface facing in the opposite direction to the plate surface 10a.
  • the through hole 10c is a hole that penetrates the support member 10 in the thickness direction.
  • the through hole 10c opens on each of the plate surface 10a and the plate surface 10b.
  • Each of the plurality of cutouts 10d is a groove provided in the outer peripheral surface of the support member 10.
  • Each notch 10d has the radial direction of the support member 10 as the depth direction, and extends from one of the plate surfaces 10a and 10b to the other.
  • a part of the core material group 60 is arranged in the plurality of notches 10d.
  • the shape of the support member 10 in plan view is not limited to the example shown in FIG. 1, and may be, for example, a polygon.
  • Each of the plate surfaces 10a and 10b is not limited to a flat surface, and may be, for example, a convex or concave curved surface or a conical surface.
  • the cross-sectional shape of the through hole 10c is not limited to a circle, but may be a polygon such as a quadrangle or a pentagon.
  • the support member 10 may be provided as needed, may be omitted, or may be configured integrally with the electrode member 20.
  • the electrode member 20 is a conductive member that is brought into contact with the surface of a living body.
  • the electrode member 20 is made of a conductive elastic material.
  • the elastic material includes, for example, a rubber material and conductive particles.
  • the rubber material include silicone rubber, ethylene-propylene-diene ternary copolymer rubber (EPDM), nitrile rubber, and urethane rubber. Among these, silicone rubber is preferably used as the rubber material from the viewpoint of biocompatibility.
  • the conductive particles include carbon particles made of carbon black, carbon nanotubes, or graphite, metal particles made of metal such as silver, and particles made of metal compounds such as silver chloride. Can be mentioned.
  • the elastic material may include a fiber base material such as a nonwoven fabric or woven fabric made of a resin material or a carbon material, and may also contain various additives. You can.
  • the electrode member 20 has a base 21 and a plurality of protrusions 22.
  • the base 21 is a part of the electrode member 20 that supports the plurality of protrusions 22.
  • the base 21 has a disk shape.
  • the outer shape of the base 21 matches the outer shape of the support member 10 in a plan view.
  • the base 21 has a first surface 21a and a second surface 21b.
  • the first surface 21a is a surface that contacts the plate surface 10a of the support member 10.
  • the first surface 21a is bonded to the plate surface 10a by vulcanization bonding, an adhesive, or the like.
  • the second surface 21b is a surface facing in the opposite direction to the first surface 21a.
  • a plurality of protrusions 22 are provided on the second surface 21b.
  • the shape of the base 21 in plan view is not limited to the example shown in FIG. 1, and may be polygonal or different from the shape of the support member 10 in plan view, for example.
  • Each of the first surface 21a and the second surface 21b is not limited to a flat surface, and may be a convex or concave curved surface or a conical surface, for example.
  • Each of the plurality of protrusions 22 is a protrusion that protrudes from the base 21.
  • the tips of the plurality of protrusions 22 come into contact with the surface of the living body.
  • the electrode member 20 having a plurality of protrusions 22 for example, when the biological electrode 1 is used for measuring brain waves, the plurality of protrusions 22 scrape hair on the head, so that the tips of the plurality of protrusions 22 touch the scalp. contact appropriately. Therefore, biological signals can be suitably detected.
  • the plurality of protrusions 22 are arranged at equal angular intervals along a virtual circle 25 centered on the center O of the base 21 when viewed in the thickness direction of the base 21. More specifically, the centers C1 of the base ends of the plurality of protrusions 22 are arranged on the virtual circle 25. Thereby, the plurality of protrusions 22 are arranged in a well-balanced manner. Here, the plurality of protrusions 22 are arranged so as to surround a circular region 28 that includes the center O of the base 21 when viewed in the thickness direction of the base 21 . In the example shown in FIG. 3, the number of protrusions 22 is six.
  • the arrangement of the plurality of protrusions 22 is not limited to the example shown in FIG.
  • the arrangement may be offset from the virtual circle 25, or may be arranged on a virtual polygon such as a triangle or quadrilateral centered on the center O.
  • at least one protrusion 22 may be provided in the region 28, or a plurality of protrusions arranged on another virtual circle concentric with the virtual circle 25 may be provided.
  • a section 22 may also be provided.
  • the number of protrusions 22 is not limited to the example shown in FIG. 3, and may be five or less or seven or more. However, from the viewpoint of realizing stable contact between the living body and the electrode member 20, the number of protrusions 22 is preferably three or more, and more preferably four or more.
  • Each of the plurality of projections 22 extends in a direction slightly inclined with respect to the thickness direction of the base 21 so that the center C2 of the tip is located radially outward from the center C1 of the base.
  • This inclination allows the space between the above-mentioned region 28 and the living body surface to be widened, and has the advantage that hair can be easily accommodated in the space, as will be described later.
  • the angle of this inclination is not particularly limited, but from the viewpoint of ensuring good contact between the living body and the electrode member 20, it is preferably 10° or more, more preferably 10° or more and 45° or less, and 10° or more. More preferably, the angle is at least 30 degrees. Note that the angle of this inclination may be equal or different between the plurality of protrusions 22. Further, each of the plurality of projections 22 may extend in a direction parallel to the thickness direction of the base 21.
  • Each of the plurality of protrusions 22 has a tapered shape. Therefore, the width or cross-sectional area of each of the plurality of protrusions 22 gradually decreases from the proximal end to the distal end of the protrusion 22. As a result, even if the space between the region 28 and the biological surface is expanded by making the protrusion direction of the protrusion 22 incline with respect to the thickness direction of the base 21 as described above, the size of the electrode member 20 can be reduced. be able to. Note that the width of the protrusion 22 may be substantially constant from the base end to the distal end.
  • each protrusion 22 is circular. Further, as shown in FIG. 2, the tip end surface of each protrusion 22 has a convexly curved shape. Thereby, it is easy to obtain a good contact state or feeling of use between the living body and the protrusion 22.
  • the cross-sectional shape of each protrusion 22 is not limited to a circle, and may be, for example, a polygon such as a quadrangle or a pentagon.
  • the shape of the tip end surface of each protrusion 22 is not limited to the illustrated shape, but may be arbitrary.
  • the height h of the protrusion 22 is not particularly limited, but is preferably 6 mm or more and 15 mm or less. By setting the height h within such a range, the tip of the protrusion 22 can be suitably brought into contact with the biological surface having hair. In particular, in the configuration in which the protrusion 22 is not arranged in the area 28 as described above, even if the subject has a lot of hair, long hair, or thick hair, the protrusion will be removed because the height h is within this range. The hair swept aside by the portion 22 can be accommodated in the space between the region 28 and the surface of the living body in just the right amount. As a result, the tip of the protrusion 22 can be brought into suitable contact with the surface of the living body.
  • the height h of the protrusion 22 is the length from the base end to the tip of the protrusion 22 in the thickness direction of the base 21, that is, in the normal direction to the second surface 21b.
  • the height h of the protrusion 22 is too low, depending on the condition of the subject's hair, etc., it is difficult to maintain good contact of the tip of the protrusion 22 with the biological surface having hair.
  • the height h of the protrusion 22 is too high, not only is this undesirable from the viewpoint of downsizing the biological electrode 1, but also the mold releasability tends to deteriorate when the electrode member 20 is molded using a mold. .
  • the heights h of the plurality of protrusions 22 are equal to each other.
  • the electrode member 20 has a plurality of holes 20a provided corresponding to the plurality of protrusions 22.
  • Each of the plurality of holes 20a is a bottomed hole that opens to the first surface 21a of the base 21.
  • Each of the plurality of holes 20a passes through the base 21.
  • Each hole 20a extends from the first surface 21a to a midway position in the direction in which the protrusion 22 protrudes.
  • the intermediate position in the protrusion direction of the protrusion 22 is a position between the base end and the tip of the protrusion 22.
  • the width of the hole 20a is substantially constant over the entire length.
  • the cross-sectional shape of the hole 20a is circular.
  • a portion of a core material 61, which will be described later, including a tip 61a is inserted into each hole 20a.
  • the shape of the hole 20a is determined according to the shape of the core material 61, which will be described later, and is not limited to the illustrated example. Further, the cross-sectional shape of the hole 20a may be different from the cross-sectional shape of the core material 61.
  • the connector 30 is a snap button type male connector. Although not shown, the connector 30 is fitted into a female connector that is electrically connected to the measuring device. As shown in FIGS. 1 and 4, the connector 30 includes a first conductive member 40 and a second conductive member 50. Each of the first conductive member 40 and the second conductive member 50 has a flanged bottomed cylindrical shape. Each of the first conductive member 40 and the second conductive member 50 is made of, for example, a metal material such as stainless steel. The first conductive member 40 and the second conductive member 50 fit into each other through the through hole 10c of the support member 10.
  • the first conductive member 40 has a first bottomed cylindrical portion 41 and a first flange portion 42.
  • the first bottomed cylindrical portion 41 has a bottomed cylindrical shape having an open end 41a as one end and a closed end 41b as the other end.
  • a reduced diameter portion 43 recessed in the radial direction is provided on the outer peripheral surface of the first bottomed cylindrical portion 41 at a position closer to the closed end 41b than the open end 41a.
  • the outer diameter of the first bottomed cylindrical portion 41 is approximately equal to the diameter of the through hole 10c of the support member 10.
  • the first flange portion 42 has a flange shape that extends outward in the radial direction from the open end 41a.
  • the first flange portion 42 is slightly inclined with respect to the radial direction so as to approach the closed end 41b as it goes radially outward.
  • the first flange portion 42 is interposed between the support member 10 and the base 21 of the electrode member 20, and the first bottomed cylindrical portion 41 is inserted into the through hole 10c of the support member 10. inserted.
  • the closed end 41b and the reduced diameter portion 43 are connected to the through hole.
  • the first flange portion 42 is embedded in the base 21 with elastic deformation of the base 21.
  • the second conductive member 50 has a second bottomed cylindrical portion 51 and a second flange portion 52.
  • the second bottomed cylindrical portion 51 has a bottomed cylindrical shape having an open end 51a as one end and a closed end 51b as the other end.
  • the second bottomed cylindrical portion 51 has a shape whose diameter decreases from the open end 51a toward the closed end 51b.
  • the inner diameter of the open end 51a is approximately equal to the outer diameter of the reduced diameter portion 43.
  • the second flange portion 52 has a flange shape that extends outward in the radial direction from the open end 51a.
  • the second flange portion 52 has a portion that is slightly inclined with respect to the radial direction so as to move away from the closed end 51b as it goes radially outward.
  • the second bottomed cylindrical portion 51 fits over a part of the first bottomed cylindrical portion 41 protruding from the plate surface 10b of the support member 10 as described above.
  • the open end 51a fits into the reduced diameter portion 43.
  • the support member 10 is sandwiched between the first flange portion 42 and the second flange portion 52, so that the connector 30 is fixed to the support member 10.
  • the core material group 60 is an assembly of a plurality of core materials 61 for reinforcing the plurality of protrusions 22 of the electrode member 20.
  • Each of the plurality of core materials 61 is made of a material having a higher Young's modulus than the material forming the electrode member 20.
  • materials constituting each of the plurality of core materials 61 include, for example, resin materials and metal materials. When a resin material is used as a material constituting each of the plurality of core materials 61, even if the core material 61 has a complicated shape, the core material 61 can be formed with high precision by injection molding or the like.
  • the resin material is not particularly limited, but from the viewpoint of processability, it is preferable to use a material with a melting point higher than the molding temperature of the material constituting the electrode member 20. More specifically, a super engineering resin material with a melting point of 150° C. or higher is preferable. Plastic is preferred. Further, the resin material may include a conductive or insulating inorganic filler. On the other hand, when a metal material is used as the material constituting each of the plurality of core members 61, there is an advantage that plastic deformation of the protrusion 22 can be easily reduced while allowing bending deformation of the protrusion 22.
  • the metal material is not particularly limited, but stainless steel is preferred from the viewpoint of corrosion resistance.
  • each of the plurality of core materials 61 may be insulating or conductive, but when it is conductive, it contributes to improving the sensitivity of the biological electrode 1. In this case, from the viewpoint of suitably improving the sensitivity of the biological electrode 1, it is preferable that the core material 61 contacts either the first conductive member 40 or the second conductive member 50.
  • the plurality of core members 61 are provided corresponding to the plurality of protrusions 22. At least a portion of each of the plurality of core materials 61 is arranged within the corresponding protrusion 22 .
  • each of the plurality of core members 61 has a rod shape having a distal end 61a and a proximal end 61b as both ends.
  • Each core member 61 is arranged so as to extend in the direction in which the corresponding protrusion 22 protrudes.
  • each of the plurality of core materials 61 is inserted into the hole 20a of the electrode member 20.
  • the tip 61a is located in the middle of the corresponding protrusion 22 in the protrusion direction. Therefore, the core material 61 does not exist between the tip 61a and the tip 22a of the protrusion 22. Therefore, the portion beyond the tip 61a of the protrusion 22 is more easily deformed by external force than the portion of the protrusion 22 where the core material 61 is present.
  • each of the plurality of core materials 61 has a portion that protrudes from the electrode member 20. The portion is arranged in the notch 10d of the support member 10.
  • the base end 61b of the core material 61 contacts the second flange portion 52 of the second conductive member 50. Therefore, movement of the core material 61 in the length direction is restricted by the second conductive member 50 so that the core material 61 does not come out from the hole 20a. Note that the core material 61 does not need to contact the second conductive member 50.
  • a method for preventing the core material 61 from coming off from the hole 20a there is a method in which the core material 61 is brought into contact with the connector 30, as well as a method in which the core material 61 is attached to another member such as the electrode member 20 with adhesive. For example, a method of fixing the support member 10 by fixing the support member 10, a method of attaching an adhesive tape to the plate surface 10b of the support member 10, etc.
  • the cross-sectional shape of the core material 61 is circular.
  • the tip end surface of the core material 61 is a convex curved surface. Therefore, stress concentration caused by the core material 61 on the electrode member 20 can be reduced. As a result, the durability of the electrode member 20 can be improved.
  • the radius of curvature of the tip surface of the core material 61 is preferably equal to 1/2 of the width W of the core material 61.
  • the width W of the core material 61 is constant over substantially the entire length direction.
  • the specific width W is determined depending on the type of material constituting the core material 61 and is not particularly limited, but from the viewpoint of ensuring the necessary mechanical strength of the protrusion 22,
  • the width Wa of the projection 22 at the position is preferably 1/5 or more and 1/2 or less, and more preferably 1/4 or more and 1/3 or less.
  • the width W of the core material 61 may not be constant, and may become narrower toward the tip 61a, for example.
  • the cross-sectional shape of the core material 61 is not limited to a circle, and may be, for example, an ellipse or a polygon.
  • the distance d between the tip 61a of the core material 61 and the tip 22a of the protrusion 22 is preferably 2 mm or more and 3 mm or less.
  • the distance d is within such a range, when the tip 22a of the protrusion 22 comes into contact with the living body surface, the protrusion 22 is suitably elastically deformed, resulting in a good feeling of use for the subject. Furthermore, by setting the distance d within such a range, the necessary rigidity of the protrusion 22 can be ensured.
  • the biological electrode 1 having the above configuration is manufactured, for example, as follows.
  • the support member 10 is formed by injection molding or the like.
  • each of the first conductive member 40 and the second conductive member 50 of the connector 30 is formed by press molding or the like.
  • the first bottomed cylindrical portion 41 of the first conductive member 40 is obtained.
  • the electrode member 20 is formed by insert molding using the assembly as an insert product.
  • the support member 10 of the assembly is joined to the electrode member 20 by vulcanization adhesive or the like, and the first flange portion 42 of the first conductive member 40 is accommodated on the first surface 21a of the electrode member 20.
  • a recess is formed.
  • the second conductive member 50 is attached to the first conductive member 40.
  • the electrode member 20 may be formed by insert molding using a plurality of core materials 61 as insert products.
  • each core material 61 is joined to the electrode member 20 by vulcanization adhesion or the like.
  • the support member 10 and the electrode member 20 may be joined using an adhesive or the like.
  • the biological electrode 1 includes the electrode member 20 and a plurality of core members 61.
  • the electrode member 20 includes a sheet-like or plate-like base 21 having a first surface 21a and a second surface 21b facing in the opposite direction to the first surface 21a, and a plurality of protrusions 22 protruding from the second surface 21b. , and is made of an elastic material with conductivity.
  • the plurality of core materials 61 are provided corresponding to two or more of the plurality of projections 22 and are made of a material having a higher Young's modulus than the elastic material.
  • the tips 61a of each of the plurality of core members 61 are located midway in the corresponding protrusion 22 in the protrusion direction.
  • the core material 61 made of a material having a higher Young's modulus than the elastic material forming the protrusion 22 is provided on the protrusion 22, the rigidity of the protrusion 22 can be increased. Therefore, fatigue of the protrusion 22 due to repeated use can be reduced. As a result, even if hair grows on the target site of the living body, the plurality of protrusions 22 can appropriately scrape the hair apart over a long period of time, so that the tips 22a of the plurality of protrusions 22 can be placed on the surface of the living body. can be brought into contact with. Therefore, biological information can be measured over a long period of time.
  • the tips 61a of each of the plurality of core members 61 are located midway in the protrusion direction within the protrusion 22, the flexibility of the tip of the protrusion 22 can be utilized. Therefore, it is also possible to reduce the pain of the subject when measuring biological information.
  • each of the plurality of core members 61 has a rod shape extending in the protruding direction of the corresponding protrusion 22. Therefore, the core material 61 can be configured so as not to be exposed from the surface of the protrusion 22. As a result, since there is no interface between the protrusion 22 and the core material 61 on the surface of the protrusion 22, it is possible to prevent the core material 61 from reducing the durability of the protrusion 22. Further, depending on the thickness of the core material 61, the protrusion 22 can be appropriately bent and deformed as the core material 61 is bent. As a result, it is possible to reduce stress concentration occurring between the portion where the core material 61 is present and the portion where the core material 61 is not present in the protrusion direction of the protrusion 22.
  • each of the plurality of core materials 61 is made of metal or resin, the protrusion 22 can be suitably reinforced by the core material 61.
  • the elastic material constituting the electrode member 20 includes a rubber material and conductive particles, the electrode member 20 having desired conductivity and elasticity can be easily realized.
  • the distance d between each tip 61a of the plurality of core members 61 and the tip 22a of the corresponding protrusion 22 is within the range of 2.0 mm or more and 3.0 mm or less. is preferred. In this case, a good balance between the rigidity of the protrusion 22 and the flexibility of the tip of the protrusion 22 can be obtained.
  • the tip surfaces of each of the plurality of core materials 61 are convex curved surfaces. Therefore, stress concentration between the tip 61a of the core material 61 and the protrusion 22 can be suitably reduced.
  • the core material 61 may be used as an insert product. Even if the electrode member is formed by insert molding, there is an advantage that the positioning accuracy of the core material 61 can be easily improved.
  • the biological electrode 1 further includes the plate-shaped support member 10 that contacts the first surface 21a.
  • the support member 10 has a plurality of notches 10d through which the plurality of core members 61 pass. Therefore, after an assembly is formed by assembling the support member 10 and the electrode member 20, the core material 61 can be attached to the assembly.
  • the plurality of protrusions 22 extend in a direction inclined with respect to the thickness direction of the base 21.
  • Such protrusions 22 have the advantage that when hair grows in the target region of the living body, the plurality of protrusions 22 can easily push the hair apart. Further, since a force that causes bending deformation is applied to the protrusion 22, fatigue of the protrusion 22 is likely to occur when the core material 61 is not used. Therefore, in such a configuration of the protrusion 22, the effect of providing the core material 61 becomes significant.
  • Second Embodiment A second embodiment of the present disclosure will be described below. In the embodiments illustrated below, for elements whose operations and functions are similar to those in the first embodiment, the reference numerals used in the description of the first embodiment will be used, and detailed descriptions of each will be omitted as appropriate.
  • FIG. 5 is an exploded perspective view of the biological electrode 1A of the second embodiment.
  • FIG. 6 is a sectional view of a biological electrode 1A of the second embodiment.
  • the biological electrode 1A is the same as the biological electrode of the first embodiment described above, except that the length of the core material 61 is different and that the support member 10A and the core material structure 60A are provided in place of the support member 10 and the core group 60.
  • the structure is similar to that of the electrode 1.
  • the support member 10A is configured in the same manner as the support member 10 of the first embodiment except that the plurality of notches 10d is omitted.
  • the core material structure 60A includes a plurality of core materials 61, an annular member 62, and a protrusion 63. These are integrally constructed of the same material.
  • the annular member 62 is a member that supports the plurality of core members 61.
  • the annular member 62 is arranged between the support member 10A and the electrode member 20.
  • the base ends 61b of the plurality of core members 61 are connected to the annular member 62.
  • the protrusion 63 protrudes radially outward from a portion of the annular member 62 in the circumferential direction. The protrusion 63 is used for positioning the core structure 60A when forming the electrode member 20 by insert molding using the core structure 60A as an insert product.
  • two or more of the plurality of core materials 61 are integrally configured.
  • the core material 61 having such a configuration has the advantage that the positioning accuracy of the two or more core materials 61 can be easily improved.
  • two or more members obtained by dividing the annular member 62 may be used, and even in this case, two or more core members 61 are integrally constituted by each of the two or more members. be able to.
  • the biological electrode 1A further includes an annular member 62 that is integrally formed with a plurality of core members 61. Therefore, the positioning accuracy of the plurality of core materials 61 can be improved.
  • the biological electrode 1A further includes the plate-shaped support member 10 that contacts the first surface 21a.
  • the annular member 62 is interposed between the base 21 and the support member 10. Therefore, the electrode member 20 can be easily formed by insert molding using the plurality of core materials 61 and the annular member 62 as insert products.
  • FIG. 7 is an exploded perspective view of the biological electrode 1B of the third embodiment.
  • FIG. 8 is a cross-sectional view of a biological electrode 1B according to the third embodiment.
  • the biological electrode 1B is configured in the same manner as the biological electrode 1 of the first embodiment described above, except that the core material structure 60B is provided in place of the core group 60.
  • the core material structure 60B includes a plurality of core materials 61 and an annular member 62. These are integrally constructed of the same material. That is, the core structure 60B is configured similarly to the core structure 60A of the second embodiment described above, except that the length of the core 61 is different and the protrusion 63 is omitted.
  • the support member 10 is arranged between the annular member 62 and the electrode member 20.
  • the core material structure 60B is attached to the assembly. .
  • the biological electrode 1B further includes the plate-shaped support member 10 interposed between the base 21 and the annular member 62 and in contact with the first surface 21a.
  • the support member 10 has a plurality of notches 10d through which the plurality of core members 61 pass. Therefore, the core material 61 can be assembled to the assembly obtained by assembling the support member 10 and the electrode member 20.
  • FIG. 9 is a diagram showing an example of use of the biological electrode 1.
  • a usage example of the biological electrode 1 of the first embodiment will be described based on FIG. 9. Note that the following usage examples are the same even when the biomedical electrode 1A or the biomedical electrode 1B is used instead of the biomedical electrode 1.
  • a plurality of biological electrodes 1 are appropriately placed at a plurality of locations on the head of the subject H.
  • the measurement location Oz is located at the back of the head X.
  • the electrode member 20 does not have a plurality of protrusions 22, it is difficult to obtain a good contact state between the electrode member 20 and the scalp.
  • the electrode member 20 has a plurality of protrusions 22 as described above, it is possible to obtain a good contact state between the electrode member 20 and the scalp.
  • Electrode for living body 1A... Electrode for living body, 1B... Electrode for living body, 10... Supporting member, 10A... Supporting member, 10a... Plate surface, 10b... Plate surface, 10c... Through hole, 10d... Notch, 20... Electrode member, 20a... Hole, 21... Base, 21a... First surface, 21b... Second surface, 22... Projection, 22a... Tip, 25... Virtual circle, 28... Area, 30... Connector, 40... First conductive Member, 41... First bottomed cylindrical part, 41a... Open end, 41b... Closed end, 42... First flange part, 43... Diameter reduced part, 50... Second conductive member, 51...
  • Second bottomed cylindrical part 51a...Open end, 51b...Closed end, 52...Second flange portion, 60...Core material group, 60A...Core material structure, 60B...Core material structure, 61...Core material, 61a...Tip, 61b...Proximal end , 62... Annular member, 63... Projection, C1... Center, C2... Center, H... Subject, O... Center, Oz... Measurement point, W... Width, Wa... Width, X... Back of the head, d... Distance, h... height.

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
PCT/JP2023/027555 2022-08-04 2023-07-27 生体用電極 Ceased WO2024029446A1 (ja)

Priority Applications (4)

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US18/994,935 US20250387060A1 (en) 2022-08-04 2023-07-27 Bioelectrode
CN202380053755.5A CN119584921A (zh) 2022-08-04 2023-07-27 生物电极
JP2024539116A JP7826491B2 (ja) 2022-08-04 2023-07-27 生体用電極
EP23850001.1A EP4566538A4 (en) 2022-08-04 2023-07-27 BIOELECTRODE

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JP2022-124857 2022-08-04
JP2022124857 2022-08-04

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004275750A (ja) * 2003-02-24 2004-10-07 Tatsuzo Nakamura 治療用器具
JP2011104337A (ja) * 2009-06-29 2011-06-02 Sony Corp 生体信号測定用装具
JP2012005777A (ja) * 2010-06-28 2012-01-12 Sony Corp 生体信号検出電極及び生体信号検出装置
JP2019166130A (ja) * 2018-03-23 2019-10-03 アルプスアルパイン株式会社 生体情報測定用電極
WO2020095589A1 (ja) 2018-11-09 2020-05-14 住友ベークライト株式会社 生体用電極、生体センサーおよび生体信号測定システム
WO2022004282A1 (ja) * 2020-07-03 2022-01-06 Nok株式会社 生体電極
US20220233124A1 (en) * 2014-01-28 2022-07-28 Medibotics Llc Dry EEG Electrode for Use on a Hair-Covered Portion of a Person's Head

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018186212A1 (ja) * 2017-04-07 2018-10-11 アルプス電気株式会社 生体情報測定用電極および生体情報の測定方法
WO2021157287A1 (ja) * 2020-02-07 2021-08-12 Nok株式会社 生体電極

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004275750A (ja) * 2003-02-24 2004-10-07 Tatsuzo Nakamura 治療用器具
JP2011104337A (ja) * 2009-06-29 2011-06-02 Sony Corp 生体信号測定用装具
JP2012005777A (ja) * 2010-06-28 2012-01-12 Sony Corp 生体信号検出電極及び生体信号検出装置
US20220233124A1 (en) * 2014-01-28 2022-07-28 Medibotics Llc Dry EEG Electrode for Use on a Hair-Covered Portion of a Person's Head
JP2019166130A (ja) * 2018-03-23 2019-10-03 アルプスアルパイン株式会社 生体情報測定用電極
WO2020095589A1 (ja) 2018-11-09 2020-05-14 住友ベークライト株式会社 生体用電極、生体センサーおよび生体信号測定システム
WO2022004282A1 (ja) * 2020-07-03 2022-01-06 Nok株式会社 生体電極

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4566538A4

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EP4566538A4 (en) 2026-02-18
JP7826491B2 (ja) 2026-03-09
EP4566538A1 (en) 2025-06-11
CN119584921A (zh) 2025-03-07
US20250387060A1 (en) 2025-12-25
JPWO2024029446A1 (https=) 2024-02-08

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