WO2008032791A1 - Unité d'électrode de conduit acoustique externe et instrument de mesure de bioinformations - Google Patents

Unité d'électrode de conduit acoustique externe et instrument de mesure de bioinformations Download PDF

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Publication number
WO2008032791A1
WO2008032791A1 PCT/JP2007/067858 JP2007067858W WO2008032791A1 WO 2008032791 A1 WO2008032791 A1 WO 2008032791A1 JP 2007067858 W JP2007067858 W JP 2007067858W WO 2008032791 A1 WO2008032791 A1 WO 2008032791A1
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WIPO (PCT)
Prior art keywords
ear canal
electrode unit
contact member
ear
contact
Prior art date
Application number
PCT/JP2007/067858
Other languages
English (en)
Japanese (ja)
Inventor
Mitsuhiro Yokoyama
Yoshihiro Urade
Iwao Yamazaki
Original Assignee
Osaka Bioscience Institute
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 Osaka Bioscience Institute filed Critical Osaka Bioscience Institute
Publication of WO2008032791A1 publication Critical patent/WO2008032791A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/369—Electroencephalography [EEG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6814—Head
    • A61B5/6815—Ear
    • A61B5/6817—Ear canal

Definitions

  • External auditory canal electrode unit and biological information measuring device External auditory canal electrode unit and biological information measuring device
  • the present invention relates to an external auditory canal electrode unit for extracting biological information such as an electroencephalogram, a heartbeat, and a body temperature in a state of being inserted into the external auditory canal, and a biological information measuring device using the same.
  • the state of sleep is determined by whether the person is awake or sleeping by observing the appearance of the person other than the person.
  • the sleep state is analyzed from the measurement results of body temperature, heart rate, sweating, blood pressure, and the like.
  • the brain is weak but generates electricity, and so-called brain waves can be detected by attaching electrodes to the brain.
  • Various sleep states have been investigated by detecting this electroencephalogram (for example, see Non-Patent Document 1).
  • a device for detecting a brain wave and examining a sleep state for example, an apparatus for obtaining a sleep profile having an electrode on a forehead and an amplifier, a microcontroller, etc. is known (for example, a patent Reference 1).
  • Patent Document 1 Special Table 2001—503667
  • Patent Document 2 Japanese Patent Laid-Open No. 2002-44791
  • Patent Document 3 Japanese Patent Laid-Open No. 2000-217792
  • Patent Document 4 JP-A-9 252496
  • Non-Patent Document 1 Tadahiko Tsujikawa, “Invitation to EEG Travel”, Hoshiwa Shoten
  • An object of the present invention is to provide an external auditory canal electrode unit and a biological information measuring device that can easily and stably measure biological information such as an electroencephalogram, a heartbeat, and a body temperature, and can greatly reduce the burden on a subject. It is.
  • the ear canal electrode unit according to the present invention is an electrode unit for taking out an electrical signal of a living body in a state of being inserted into the ear canal,
  • the ear canal contact member is provided with a communication hole for transmitting sound from the outside to the eardrum side.
  • the ear canal contact member preferably has a convex portion that spirally contacts the ear canal.
  • the ear canal contact member is formed in a coil shape
  • the holding member that holds the ear canal contact member preferably has a tapered cylindrical portion disposed inside the coil.
  • the ear canal contact member has a cylindrical portion and a spiral convex portion integrally formed on the outer surface of the cylindrical portion.
  • the ear canal contact member is preferably formed in a multi-strip coil shape!
  • the ear canal contact member has a convex portion that makes an annular contact with the ear canal.
  • the ear canal contact member preferably has a linear member curved toward the ear canal.
  • a biological information measuring apparatus includes the above-described external ear canal electrode unit,
  • a ground electrode unit that can be attached to a part of a living body
  • a signal processing unit To process the electrical signal generated between the ear canal electrode unit and the ground electrode unit A signal processing unit.
  • the biological information measuring apparatus includes a first ear canal electrode unit inserted into the right ear canal,
  • a second ear canal electrode unit inserted into the left ear canal
  • a ground electrode unit attached to the right pinna and / or the left pinna;
  • a first analog-digital converter for converting an electrical signal extracted by the first ear canal electrode unit into a digital value
  • a second analog-digital converter for converting the electrical signal extracted by the second ear canal electrode unit into a digital signal
  • An OR circuit for calculating the logical sum of the first analog-to-digital converter power, the digital signal from the second analog-digital converter, and
  • a signal calculation unit for calculating the logical sum is provided.
  • the external auditory canal contact member partially contacts the external auditory canal with a gap, so that foreign matters such as ear hair, ear dirt, and dust existing on the skin surface of the external auditory canal are in the gap. Get into. For this reason, since there is less foreign matter interposed between the ear canal contact member and the skin surface, the contact resistance between the skin and the electrode can be kept low. As a result, it is possible to efficiently extract the electrical signal of the living body with a high S / N ratio.
  • FIG. 1 is a cross-sectional view showing the internal structure of the ear
  • Fig. 1 (b) is a cross-sectional view showing a conventional electrode unit mounted state
  • Fig. 1 (c) is related to the present invention.
  • FIG. 6 is a cross-sectional view showing a mounting state of the electrode unit.
  • FIG. 2 shows a first embodiment of the present invention
  • FIG. 2 (a) is a front view
  • FIG. 2 (b) is a side view
  • FIG. 2 (c) is a rear view
  • FIG. 2 (d) is an axis
  • FIG. 2 (e) is a side view showing the ear canal contact member.
  • FIG. 3 shows a second embodiment of the present invention, FIG. 3 (a) is a front view, FIG. 3 (b) is a side view, FIG. 3 (c) is a rear view, and FIG. 3 (d) is an axis.
  • FIG. 3 shows a second embodiment of the present invention
  • FIG. 3 (a) is a front view
  • FIG. 3 (b) is a side view
  • FIG. 3 (c) is a rear view
  • FIG. 3 (d) is an axis.
  • FIG. 4 shows a third embodiment of the present invention.
  • FIG. 4 (a) is a front view
  • FIG. 4 (b) is a side view
  • FIG. 4 (c) is a rear view
  • FIG. 4 (d) is an axis.
  • FIG. 5 shows a fourth embodiment of the present invention
  • FIG. 5 (a) is a front view
  • FIG. 5 (b) is a side view
  • FIG. 5 (c) is a rear view
  • FIG. 5 (d) is an axis.
  • FIG. 6 shows a fifth embodiment of the present invention
  • FIG. 6 (a) is a front view
  • FIG. 6 (b) is a side view
  • FIG. 6 (c) is a rear view
  • FIG. 6 (d) is an axis.
  • FIG. 7 shows a sixth embodiment of the present invention
  • FIG. 7 (a) is a front view
  • FIG. 7 (b) is a side view
  • FIG. 7 (c) is a rear view
  • FIG. 7 (d) is an axis.
  • FIG. 8 shows a seventh embodiment of the present invention
  • FIG. 8 (a) is a front view
  • FIG. 8 (b) is a side view
  • FIG. 8 (c) is a rear view
  • FIG. 8 (d) is an axis.
  • FIG. 9 shows an eighth embodiment of the present invention
  • FIG. 8 (a) is a front view
  • FIG. 8 (b) is a side view
  • FIG. 8 (a) is a front view
  • FIG. 8 (b) is a side view
  • FIG. 8 (b) is a side view
  • FIG. 8 (c) is a rear view
  • FIG. 8 (d) is a cross-sectional view along the axis.
  • FIG. 10 It is a block diagram showing an example of a biological information measuring apparatus according to the present invention.
  • FIG. 1 (a) is a cross-sectional view showing the internal structure of the ear.
  • the ear is divided into the outer ear from the ear canal to the tympanic membrane, the middle ear with the ossicles and the tympanic chamber, and the inner ear with the semi-hemi organs.
  • An auricle is provided so as to surround the auricle, and the lower part of the auricle is called an earlobe.
  • the electrode unit according to the present invention is positioned through the ear canal and in contact with the skin surface of the ear canal.
  • FIG. 1 (b) is a cross-sectional view showing a mounting state of a conventional electrode unit
  • FIG. 1 (c) is a cross-sectional view showing a mounting state of the electrode unit according to the present invention.
  • the conventional electrode unit 1 is generally composed of a cylindrical member having a smooth surface.
  • foreign matter such as ear hair, ear dirt, and dust is in contact with the electrode surface and the skin. Will be disturbed.
  • the contact resistance of the electrode tended to be high or unstable.
  • foreign objects are easily pushed into the ear canal by insertion of the electrode unit, which may cause inflammation in the ear canal.
  • the electrode unit 10 is, for example, an external auditory canal formed in a coil shape so as to partially contact the external auditory canal with a gap.
  • a contact member is provided. Since foreign matter such as ear hair, ear dirt, and dust enters the gap, the contact between the ear canal contact member and the skin surface is stabilized, and the contact resistance between the skin and the electrode can be kept low. it can. In addition, foreign objects are pushed into the ear canal and become less likely to cause inflammation.
  • the electrode unit 10 according to the present invention has a communication hole for transmitting sound from the outside to the eardrum side, sound and sound from the outside can be heard even when the electrode unit is mounted. It becomes possible to measure biological information under the same environmental conditions as daily life.
  • FIG. 2 shows a first embodiment of the present invention.
  • FIG. 2 (a) is a front view
  • FIG. 2 (b) is a side view
  • FIG. 2 (c) is a rear view
  • FIG. 2 (d) is an axis
  • FIG. 2 (e) is a side view showing the ear canal contact member.
  • the electrode unit 10 includes an ear canal contact member 11 formed in a coil shape so as to spirally contact the ear canal and a holding member 21 that holds the ear canal contact member 11.
  • the ear canal contact member 11 is made of a conductive material, for example, a metal such as titanium or phosphor bronze, a shape memory alloy, or the like, and the surface of the ear canal contact member 11 has little influence on a living body if necessary.
  • a metal material for example, gold or the like may be treated.
  • the holding member 21 is made of an electrically insulating material such as a plastic such as PC (polycarbonate), PP (polypropylene), or ABS, and has a stagger portion 22 having a diameter larger than the ear hole, and is disposed inside the coil. And a cylindrical portion 23.
  • a plastic such as PC (polycarbonate), PP (polypropylene), or ABS
  • the coil shape is adapted to the inner diameter of the ear canal, for example, the tip diameter D1 is 4 mm to
  • the length L1 from the stopper 22 to the tip is 10mm ⁇ ;
  • the coil wire diameter is preferably designed to be, for example, about 0.1 mm to 2 mm, and the coil pitch is, for example, about 2 mm to 4 mm so as to obtain an appropriate gap.
  • the diameter D2 of the stopper portion 22 is, for example, 10 mm to l so as to be larger than the inner diameter of the ear canal.
  • the cylindrical portion 23 is formed in a tapered shape and is designed so that a gap with the inner diameter of the coil becomes wider toward the tip, so that even a bent ear canal can be inserted. Flexibility is ensured.
  • the external auditory canal contact member 11 has a coil shape, it is possible to transmit sound from the outside to the eardrum side. Further, the holding member 21 has a communication hole 20 formed from the outside. Sound is transmitted to the eardrum side.
  • the base portion 12 of the coil penetrates the stopper portion 22 and is exposed at the outer surface of the holding member 21, and the end portion is bent in a U shape, whereby the fixing strength to the holding member 21 is increased. Get higher.
  • This An external lead wire is electrically connected to the exposed root portion 12.
  • the tip of the coil is bent inward to prevent pulling to the skin, and further bent toward the communicating hole 20 toward the stopper portion 22 side.
  • the ear hair is aligned along the coil gap by rotating the electrode unit 10 while rotating it along the spiral shape of the coil. It can be installed smoothly without scraping.
  • the external auditory canal contact member 11 When the electrode unit 10 is attached, the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is stabilized.
  • the contact resistance between skin and electrode can be kept low.
  • stable holding is ensured by the spiral convex portion being pressed against the skin, and the spiral gap relaxes the skin pressure, thereby reducing the burden on the subject.
  • the electrode unit 10 When the electrode unit 10 is removed from the ear canal, the electrode unit 10 can be smoothly taken out by rotating it along the spiral shape of the coil.
  • FIG. 3 shows a second embodiment of the present invention.
  • FIG. 3 (a) is a front view
  • FIG. 3 (b) is a side view.
  • FIG. 3 (c) is a rear view
  • FIG. 3 (d) is a cross-sectional view along the axis.
  • the electrode unit 10 includes an ear canal contact member 11 formed so as to spirally contact the ear canal and a holding member 21 that holds the ear canal contact member 11.
  • the ear canal contact member 11 and the holding member 21 are integrally formed and formed of a conductive material, for example, conductive rubber, conductive plastic, or the like, or PC, PP, A
  • It is formed of a plastic material such as BS that has been subjected to a metal material that has little effect on the living body, such as gold, for example.
  • the ear canal contact member 11 includes a cylindrical portion 13 and a spiral convex portion 14 formed integrally with the outer surface of the cylindrical portion 13.
  • the holding member 21 is provided with a stagger portion 22 having a diameter larger than that of the ear hole.
  • the spiral shape of the convex portion 14 is adapted to the inner diameter of the ear canal, for example, the diameter D1 of the tip is about 4 mm to 7 mm, and the length L1 from the stopper portion 22 to the tip is about 10 mm to about 12 mm. It is preferable to design to.
  • the width of the convex portion 14 is, for example, about 0.1 mm to 2 mm.
  • the helical pitch is preferably designed to be, for example, about 2 mm to 4 mm so as to obtain an appropriate gap.
  • the diameter D2 of the stopper portion 22 is, for example, 10 mm to l so as to be larger than the inner diameter of the ear canal.
  • a communication hole 20 is formed in the ear canal contact member 11 and the holding member 21, and sound from the outside is transmitted to the eardrum side.
  • the ear hairs are aligned along the coil gap by rotating along the spiral shape of the convex portion 14, and the foreign object such as the earlobe is aligned. It can be installed smoothly without scraping.
  • the external auditory canal contact member 11 When the electrode unit 10 is attached, the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is stabilized.
  • the contact resistance between skin and electrode can be kept low.
  • stable holding is ensured by the helical convex portion 14 being pressed against the skin, and the helical gap relaxes the skin pressure, thereby reducing the burden on the subject.
  • the electrode unit 10 When removing the electrode unit 10 from the external auditory canal, the electrode unit 10 can be removed smoothly by pulling out while rotating along the spiral shape of the convex portion 14.
  • FIG. 4 shows a third embodiment of the present invention.
  • FIG. 4 (a) is a front view and
  • FIG. 4 (b) is a side view.
  • FIG. 4 (c) is a rear view
  • FIG. 4 (d) is a cross-sectional view along the axial spring.
  • the electrode unit 10 includes an ear canal contact member 11 formed in a coil shape so as to spirally contact the ear canal and a holding member 21 that holds the ear canal contact member 11.
  • the ear canal contact member 11 is formed of a conductive material, for example, a metal such as titanium or phosphor bronze, a shape memory alloy, or the like, and the surface of the ear canal contact member 11 has little influence on a living body if necessary.
  • a metal material for example, gold or the like may be treated.
  • the holding member 21 is made of an electrically insulating material such as a plastic such as PC (polycarbonate), PP (polypropylene) or ABS, and has a stagger portion 22 having a diameter larger than the ear hole and having a diameter.
  • the ear canal contact member 11 is formed in a double coil shape. This increases the moving distance per rotation of the electrode unit 10, so that the electrode unit 10 can be inserted and removed more easily than a single coil. Further, the external auditory canal contact member 11 can be formed in a multi-striped coil shape such as a 3-strip coil shape in addition to the 2-strip coil shape.
  • the coil shape is adapted to the inner diameter of the ear canal, for example, the tip diameter D1 is 4 mm to
  • the length L1 from the stopper 22 to the tip is 10mm ⁇ ;
  • the coil wire diameter is preferably designed to be, for example, about 0.1 mm to 2 mm, and the coil pitch is, for example, about 4 mm to 8 mm so as to obtain an appropriate gap.
  • the diameter D2 of the stopper 22 is larger than the inner diameter of the ear canal, for example, 10 mm to l
  • the external auditory canal contact member 11 has a coil shape, it is possible to transmit sound from the outside to the eardrum side. Further, the holding member 21 is formed with a communication hole 20, and from the outside, Sound is transmitted to the eardrum side.
  • the root portion 12 of the coil is embedded in the stopper portion 22 and exposed at the inner surface of the holding member 21, and an elastic connector 30 such as a banana chip is electrically connected to the exposed root portion 12. .
  • the ear hair is aligned along the coil gap by rotating the electrode unit 10 while rotating it along the spiral shape of the coil. It can be installed smoothly without scraping.
  • the external auditory canal contact member 11 When the electrode unit 10 is attached, the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is stabilized.
  • the contact resistance between skin and electrode can be kept low.
  • the spiral-shaped convex portion is pressed against the skin to ensure stable holding, and the spiral-shaped gap is formed in the skin. Since the skin pressure is relieved, the burden on the subject can be reduced.
  • the electrode unit 10 When removing the electrode unit 10 from the ear canal, the electrode unit 10 can be smoothly taken out by rotating it along the spiral shape of the coil.
  • Fig. 5 shows a fourth embodiment of the present invention.
  • Fig. 5 (a) is a front view
  • Fig. 5 (b) is a side view
  • Fig. 5 (c) is a rear view
  • Fig. 5 (d) is an axis.
  • FIG. 5 (a) is a front view
  • Fig. 5 (b) is a side view
  • Fig. 5 (c) is a rear view
  • Fig. 5 (d) is an axis.
  • the electrode unit 10 includes an ear canal contact member 11 formed so as to spirally contact the ear canal and a holding member 21 that holds the ear canal contact member 11.
  • the ear canal contact member 11 and the holding member 21 are integrally formed and formed of a conductive material, for example, conductive rubber, conductive plastic, or the like, or PC, PP, A
  • It is formed of a plastic material such as BS that has been subjected to a metal material that has little effect on the living body, such as gold, for example.
  • the external auditory canal contact member 11 includes a cylindrical portion 13 and a convex portion 14 arranged in a spiral shape integrally formed on the outer surface of the cylindrical portion 13.
  • the convex portion 14 is formed as shown in FIG.
  • It may be arranged at equal intervals such as 0 degrees, or may be arranged at unequal intervals.
  • the holding member 21 is provided with a stagger portion 22 having a diameter larger than that of the ear hole.
  • the spiral shape in which the convex portions 14 are arranged is adapted to the inner diameter of the ear canal, for example, the tip diameter D1 is about 4 mm to 7 mm, and the length L1 from the stopper portion 22 to the tip is 10 mm to 12 mm. It is preferable to design to about mm. Further, it is preferable that the width of the convex portion 14 is designed to be, for example, about 0.1 mm to 2 mm, and the spiral pitch is, for example, about 2 mm to 4 mm so as to obtain an appropriate gap.
  • the diameter D2 of the stopper portion 22 is, for example, 10 mm to l so as to be larger than the inner diameter of the ear canal.
  • a communication hole 20 is formed in the external auditory canal contact member 11 and the holding member 21, and sound from the outside is transmitted to the eardrum side.
  • the electrode unit 10 When the electrode unit 10 is electrically connected to the measuring device, as shown in Fig. 5 (d), for example, by inserting an elastic connector 30 such as a banana tip into the communication hole 20, it is easy and stable. An electrical connection is obtained.
  • an elastic connector 30 such as a banana tip
  • the ear hairs are aligned along the coil gap by rotating along the spiral shape of the convex portion 14, and the foreign object such as the earlobe is arranged. It can be installed smoothly without scraping.
  • the external auditory canal contact member 11 When the electrode unit 10 is attached, the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is stabilized.
  • the contact resistance between skin and electrode can be kept low.
  • stable holding is ensured by the helical convex portion 14 being pressed against the skin, and the helical gap relaxes the skin pressure, thereby reducing the burden on the subject.
  • the electrode unit 10 When removing the electrode unit 10 from the external auditory canal, the electrode unit 10 can be removed smoothly by pulling out while rotating along the spiral shape of the convex portion 14.
  • FIG. 6 shows a fifth embodiment of the present invention.
  • FIG. 6 (a) is a front view
  • FIG. 6 (b) is a side view.
  • FIG. 6 (c) is a rear view
  • FIG. 6 (d) is a cross-sectional view along the axial spring.
  • the electrode unit 10 includes an external auditory canal contact member 11 formed in a coil shape so as to spirally contact the external auditory canal, and a ring-shaped holding member 21 that holds the external auditory canal contact member 11. .
  • the ear canal contact member 11 is formed of a conductive material, for example, a metal such as titanium or phosphor bronze, a shape memory alloy, or the like, and the surface of the ear canal contact member 11 has little influence on a living body if necessary.
  • a metal material for example, gold or the like may be treated.
  • the holding member 21 is formed of an electrically insulating material such as a plastic such as PC (polycarbonate), PP (polypropylene), or ABS, and also functions as a stagger having a diameter larger than that of the ear canal.
  • a plastic such as PC (polycarbonate), PP (polypropylene), or ABS
  • the coil shape should be designed to fit the inner diameter of the ear canal, for example, the tip diameter D1 is about 4mm to 7mm, and the length L1 from the holding member 21 to the tip is 10mm to about 12mm. Force S is preferred.
  • the diameter of the coil wire is preferably designed to be, for example, about 0.1 mm to 2 mm.
  • the coil pitch is approximately equal to the diameter of the coil wire so as to be closely wound. Designed equally, this increases the overall elasticity of the coil and increases the area of hornworm contact with the ear canal skin.
  • the diameter D2 of the holding member 21 as a stopper is larger than the inner diameter of the ear canal, for example,
  • the inner diameter of the holding member 21 is designed to be slightly smaller than the coil diameter D1, and can be displaced along the coil to adjust the length L1 while ensuring the elastic holding of the coil.
  • a communication hole 20 is formed inside the coil, and sound from the outside is transmitted to the eardrum side.
  • An external lead wire is electrically connected to the root portion 12 of the coil, or an elastic connector 30 such as a banana tip may be inserted into the communication hole 20.
  • the tip of the coil is bent inward to prevent it from being pulled against the skin, and further bent toward the holding member 21 toward the communication hole 20.
  • the ear hairs are aligned along the coil gap by rotating the electrode unit 10 while rotating it along the spiral shape of the coil. It can be installed smoothly without scraping.
  • the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is stabilized.
  • the contact resistance between skin and electrode can be kept low.
  • stable holding is ensured by the spiral convex portion being pressed against the skin, and the spiral gap relaxes the skin pressure, thereby reducing the burden on the subject.
  • the electrode unit 10 When removing the electrode unit 10 from the ear canal, the electrode unit 10 can be smoothly taken out by rotating it along the spiral shape of the coil.
  • FIG. 7 shows a sixth embodiment of the present invention.
  • FIG. 7 (a) is a front view
  • FIG. 7 (b) is a side view.
  • FIG. 7 (c) is a rear view
  • FIG. 7 (d) is a cross-sectional view along the axis.
  • the electrode unit 10 includes an ear canal contact member 11 formed in a coil shape so as to spirally contact the ear canal and a ring-shaped holding member 21 that holds the ear canal contact member 11. .
  • the ear canal contact member 11 is formed of a conductive material, for example, a metal such as titanium or phosphor bronze, a shape memory alloy, or the like, and the surface of the ear canal contact member 11 has little influence on a living body if necessary.
  • a metal material for example, gold or the like may be treated.
  • the holding member 21 is formed of an electrically insulating material such as a plastic such as PC (polycarbonate), PP (polypropylene), or ABS, and also functions as a stagger having a diameter larger than that of the ear canal.
  • a plastic such as PC (polycarbonate), PP (polypropylene), or ABS
  • the coil shape is adapted to the inner diameter of the ear canal, for example, the tip diameter D1 is 4 mm to
  • the length L1 from the holding member 21 to the tip is about 10 mm to about 7 mm;
  • the diameter of the coil wire is preferably designed to be, for example, about 0.1 mm to 2 mm.
  • the coil pitch is designed to be approximately equal to the diameter of the coil wire so that the outer side from the holding member 21 is closely wound, and the coil pitch is widened from the holding member 21 to the inner ear side. Yes.
  • the diameter D2 of the holding member 21 as a stopper is larger than the inner diameter of the ear canal, for example,
  • the inner diameter of the holding member 21 is designed to be slightly smaller than the coil diameter D1, and can be displaced along the coil to adjust the length L1 while ensuring the elastic holding of the coil.
  • a communication hole 20 is formed inside the coil, and sound from the outside is transmitted to the eardrum side.
  • An external lead wire is electrically connected to the root portion 12 of the coil, or an elastic connector 30 such as a banana chip may be inserted into the communication hole 20.
  • the tip of the coil is bent inward to prevent pulling to the skin, and further bent toward the holding member 21 toward the communication hole 20.
  • the external auditory canal contact member 11 When the electrode unit 10 is attached, the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is safe.
  • the contact resistance between the skin and the electrode can be kept low.
  • stable holding is ensured by the spiral convex portion being pressed against the skin, and the spiral gap relaxes the skin pressure, thereby reducing the burden on the subject.
  • Fig. 8 shows a seventh embodiment of the present invention.
  • Fig. 8 (a) is a front view
  • Fig. 8 (b) is a side view
  • Fig. 8 (c) is a rear view
  • Fig. 8 (d) is a shaft. It is sectional drawing along a spring.
  • the electrode unit 10 includes an ear canal contact member 11 formed so as to come into annular contact with the ear canal and a holding member 21 that holds the ear canal contact member 11.
  • the ear canal contact member 11 and the holding member 21 are integrally formed and formed of a conductive material, for example, conductive rubber, conductive plastic, or the like, or PC, PP, ABS, or the like.
  • the plastic surface is made of a metal material that has little effect on the living body, for example, a metal material such as gold.
  • the ear canal contact member 11 includes a cylindrical portion 13 and an annular convex portion 14 formed integrally with the outer surface of the cylindrical portion 13.
  • the convex part 14 extends radially from the cylindrical part 13 and forms a disc shape that is convexly curved toward the tip.
  • a plurality of such convex portions 14 are arranged at predetermined intervals along the axis.
  • a planar disk shape or a combination of a curved disk and a planar disk may be used.
  • the convex portion 14 located at the tip is designed to be smaller than the diameter of the other convex portions 14, thereby facilitating insertion into the ear canal and adapting to a bent external auditory canal.
  • the holding member 21 is provided with a stagger portion 22 having a diameter larger than that of the ear hole.
  • the shape of the convex portion 14 is adapted to the inner diameter of the ear canal, for example, the diameter D1 is about 4 mm to 7 mm, the tip diameter D3 is about 3 mm to 6 mm, and the length from the stopper portion 22 to the tip
  • the length L1 is preferably 10 mm to about 12 mm.
  • the width of the projections 14 is preferably designed to be about 0.1 mm to 2 mm, for example, and the arrangement pitch of the projections 14 is preferably designed to be about 2 mm to 4 mm, for example, so as to obtain an appropriate gap.
  • the diameter D2 of the stopper portion 22 is, for example, 10 mm to l so as to be larger than the inner diameter of the ear canal. It is preferable to design to about 2 mm.
  • the external auditory canal contact member 11 and the holding member 21 are formed with a tapered tapered communication hole 20, and sound from the outside is transmitted to the eardrum side.
  • the convex portion 14 is elastically deformed by inserting it in a linear motion or a spiral motion, so that a foreign object such as an earlobe is not scraped off. Can be installed.
  • the external auditory canal contact member 11 is partially in contact with the external auditory canal with a gap, so that the contact between the external auditory canal contact member 11 and the skin surface is stabilized.
  • the contact resistance between skin and electrode can be kept low.
  • stable holding is ensured by the tip end of the convex portion 14 being in pressure contact with the skin, and the helical gap relieves the skin pressure, thereby reducing the burden on the subject.
  • the convex portion 14 is elastically deformed and pulled out smoothly by being pulled out by a linear motion or a spiral motion.
  • FIG. 9 shows an eighth embodiment of the present invention.
  • FIG. 8 (a) is a front view
  • FIG. 8 (b) is a side view.
  • FIG. 8 (c) is a rear view
  • FIG. 8 (d) is a cross-sectional view along the axis.
  • the electrode unit 10 includes the external auditory canal contact members 11a and 11b formed in a linear shape so as to contact the external auditory canal along the generatrix direction, and a holding member that holds the external auditory canal contact members 11a and 11b. It consists of 21.
  • the ear canal contact members 11a and ib are formed of a conductive material, for example, a metal such as titanium or phosphor bronze, a shape memory alloy, or the like.
  • a metallic material with a small amount of metal, for example, gold or the like, may be applied.
  • the holding member 21 is made of an electrically insulating material such as a plastic such as PC (polycarbonate), PP (polypropylene), ABS, etc., and has a stagger portion 22 having a diameter larger than the ear canal, and a cylindrical portion protruding toward the inner ear side 23.
  • the external auditory canal contact member 11a, l ib passes through the distal end of the cylindrical portion 23, and then is convexly curved toward the external auditory canal in the range from the distal end of the cylindrical portion 23 to the stopper portion 22.
  • the stopper portion 22 And is exposed on the outer surface of the holding member 21. External leads are electrically connected to the exposed portions.
  • the ear canal contact members 11a and l ib intersect with each other so as to be substantially orthogonal at the tip of the cylindrical portion 23, and function as four electrodes disposed at equal intervals of 90 degrees around the axis as a whole.
  • the ear canal contact member 11a and the ear canal contact member l ib are arranged so as to be in electrical contact, they function as one electrode as a whole.
  • the signal electrode and the ground electrode can be moved as a solid electrode as a whole with a force S. .
  • the overall shape of the ear canal contact member 11a, l ib is adapted to the inner diameter of the ear canal.
  • the maximum diameter D1 is about 4 mm to 7 mm and the tip diameter D3 is about 3 mm to 6 mm.
  • the length L1 from the portion 22 to the tip is preferably 10 mm to about 12 mm.
  • the shape of the external auditory canal contact member 11a, l ib should be designed to have a width of about lmm to 3mm and a thickness of about 0.1mm to 3mm. In order to prevent whispering, it is preferable that the contact surface with the ear canal is convex and curved outward.
  • the diameter D2 of the stopper portion 22 is preferably designed to be, for example, about 10 mm to 12 mm so as to be larger than the inner diameter of the ear canal.
  • the external auditory canal contact members 11a and l ib are linear members arranged radially, it is possible to transmit sound from the outside to the eardrum side, and further, the holding member 21 has a communication hole. 20 is formed, and the sound from the outside world is transmitted to the eardrum side.
  • the ear canal contact members 11a, l ib are partially in contact with the ear canal with a gap, so that the ear canal contact members 11a, l ib and the skin surface
  • the contact between the skin and the electrode can be stabilized, and the contact resistance between the skin and the electrode can be kept low.
  • the curved portions of the ear canal contact members 11a and l ib are pressed against the skin to ensure stable holding, and the gap relaxes the skin pressure, reducing the burden on the subject.
  • the electrode unit 10 When the electrode unit 10 is removed from the external auditory canal, it can be smoothly removed by pulling it out in a linear motion.
  • FIG. 10 is a block diagram showing an example of a biological information measuring apparatus according to the present invention.
  • the electrode unit according to each embodiment described above is attached to the right external auditory canal and / or the left external auditory canal of the subject P, and an electrical signal including biological information such as an electroencephalogram, a heartbeat, and a body temperature is taken out through the signal cable.
  • the ground electrode can be configured in the form of a unit such as an electrode clip, an electrode pad, or an electrode monolayer, and attached to a part of the body of the subject P (eg, finger, wrist, arm, ankle, etc.). However, it is preferably attached to the right earlobe and / or the left earlobe of the subject P.
  • the electrode unit is mounted as follows: a) The electrode unit is attached only to the right ear canal, the ground electrode is attached only to the right earlobe, b) The electrode unit is attached only to the right ear canal, and the ground electrode is attached to the left earlobe.
  • the biological information measuring device includes an electrode unit attached to both or one of the ear canals, a signal processing unit 50, a signal calculation unit 60, and the like.
  • the signal processing unit 50 amplifies the signals from the electrode units attached to the right ear canal and the left ear canal, and the signals from the amplifiers 51 and 52 to a predetermined frequency band.
  • Filter 53, 54 that removes noise
  • a / D (analog / digital) converter 55, 56 that converts the signal from each filter 53, 54 into a digital signal
  • each A / D converter 55, 56 An OR circuit 57 for calculating the logical sum of these digital signals, a memory unit 58 for storing the digital signal from the OR circuit 57, and the like.
  • the OR circuit 57 plays a role of improving the S / N ratio by adding two signals.
  • the memory unit 58 can be configured as a removable memory such as a USB memory, an SD memory card, or a CF memory card.
  • the signal calculation unit 60 can be configured by a general personal computer, and is a memory unit.
  • the display unit 65 includes a display unit 65 for displaying calculation results, and may include a keyboard, a pointing device, a network I / F circuit, and the like.
  • electroencephalogram measurement will be described as an example.
  • the electrical signal extracted from the right external auditory canal of subject P passes through amplifier 51, filter 53, and A / D converter 55 and is converted to digital data.
  • the electrical signal extracted from the left external auditory canal of subject P passes through amplifier 52, filter 54, and A / D converter 56 and is converted to digital data.
  • the logical sum of both digital data is calculated by the OR circuit 57, and the S / N ratio is improved.
  • the obtained digital data is sequentially stored in the memory unit 58.
  • the memory unit 58 is removed from the signal processing unit 50, connected to the I / F unit 61 of the signal calculation unit 60, and the data stored in the memory unit 58 is read out. Store in the data storage unit 64. Subsequently, the sleep state analysis program is activated to analyze the sleep state of the subject P (for example, the duration, period, and depth of REM sleep and non-REM sleep), thereby objectively determining the degree of sleep disorder of the subject P. I can grasp it.
  • the sleep state analysis program is activated to analyze the sleep state of the subject P (for example, the duration, period, and depth of REM sleep and non-REM sleep), thereby objectively determining the degree of sleep disorder of the subject P. I can grasp it.
  • FIG. 11 and 12 show the new data of the same person
  • FIG. 11 shows the data of the second eye
  • FIG. 12 shows the data of the second eye.
  • the portion surrounded by the upper frame in each figure is the electroencephalogram data actually measured.
  • the bottom left is a diagram that clearly shows the waveforms and amplitude ratios of delta waves, theta waves, etc. by performing Fourier transform based on brain wave data using software.
  • the figure indicated by the dots and lines at the top is a sleep progress chart showing the time course of the sleep stage based on each waveform analysis.
  • the external auditory canal electrode unit and the biological information measuring device using the same according to the present invention include an electroencephalogram.

Abstract

La présente invention concerne une unité d'électrode (10) pour extraire des signaux électriques du corps dans un état où ils peuvent être insérés dans le conduit acoustique externe, qui est équipé d'un élément de contact du conduit acoustique externe (11) de matériau conducteur en contact partiel avec le conduit acoustique externe, avec un interstice entre les deux. L'élément de contact du conduit acoustique externe (11) est muni d'un orifice de communication (20) pour transmettre le son environnemental sur le côté du tympan. De cette manière, des bioinformations, notamment les ondes cérébrales, les battements du cœur ou la température corporelle, peuvent être mesurées de manière simple et stable, ce qui réduit considérablement la charge reposant sur le sujet testé.
PCT/JP2007/067858 2006-09-14 2007-09-13 Unité d'électrode de conduit acoustique externe et instrument de mesure de bioinformations WO2008032791A1 (fr)

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WO2010022437A1 (fr) * 2008-08-27 2010-03-04 Cochlear Limited Détection de bruits organiques au moyen d'un microphone implantable
CN111839509A (zh) * 2020-08-21 2020-10-30 大连理工大学 一种外耳道脑电信号采集的装置及方法

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JP5321172B2 (ja) 2009-03-17 2013-10-23 ソニー株式会社 外耳道装着具及び生体信号測定装置
JP2011005176A (ja) * 2009-06-29 2011-01-13 Sony Corp 耳介装着具及び生体信号測定装置
EP2388680A1 (fr) 2010-05-17 2011-11-23 Otto-von-Guericke-Universität Magdeburg Appareil et procédé de contrôle d'au moins un dispositif, un programme informatique correspondant et un support correspondant de stockage lisible sur ordinateur
JP5464072B2 (ja) 2010-06-16 2014-04-09 ソニー株式会社 筋活動診断装置および方法、並びにプログラム
JP5843005B2 (ja) * 2012-04-25 2016-01-13 株式会社村田製作所 心電信号計測装置、及び、心電信号計測方法
JP6104035B2 (ja) * 2013-04-30 2017-03-29 株式会社Ｎｔｔドコモ イヤホン及び眼球運動推定装置
JP6354969B1 (ja) * 2017-12-15 2018-07-11 晶朗 木村 脳波検出用電極
CN110680311B (zh) * 2019-08-30 2020-11-03 北京航空航天大学 一种干电极脑电采集装置
JP7409613B2 (ja) 2021-01-29 2024-01-09 株式会社プロアシスト 頭部電気信号検出用電極装置

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WO2010022437A1 (fr) * 2008-08-27 2010-03-04 Cochlear Limited Détection de bruits organiques au moyen d'un microphone implantable
CN111839509A (zh) * 2020-08-21 2020-10-30 大连理工大学 一种外耳道脑电信号采集的装置及方法

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