JP2018089446A - Clothing for electrocardiogram measurement and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement method for measuring an electrocardiogram in which noise is reduced, and a clothing for electrocardiogram measurement that allows measurement of the electrocardiogram as such.SOLUTION: There is provided a clothing for electrocardiogram measurement in which an electrode and wiring for electrocardiogram measurement are formed on a 2-way tricot fabric.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electrocardiogram measurement method with less noise, and an electrocardiogram measurement garment capable of measuring an electrocardiogram by being worn as a garment.

  Conventionally, a method for measuring an electrocardiogram is generally a method of detecting an electrical signal generated by a human body by fixing electrodes at two or more positions on the surface of the human body in a resting state. In this method, in order to fix the electrode, it is necessary to apply a gel or paste between the electrode and the skin surface or to use an adhesive tape. For this reason, in continuous measurement over a long period of time, unpleasantness, itching and discomfort due to perspiration are generated, and dermatitis may occur further when an adhesive tape is used.

  On the other hand, in recent years, there has been an increasing demand for knowing what the state of the heart is during exercise, but the conventional methods using gels and pastes have weak adhesion, and exercise such as walking and running The electrode falls from the human body during operation. Moreover, in the method using an adhesive tape, since the amount of perspiration increases, there is a problem that discomfort due to perspiration becomes more prominent.

  For these reasons, in the medical field and the health monitoring field, wearable biological information measuring devices that can easily measure biological information such as electrocardiograms by wearing clothes with electrodes, belts, and straps have attracted attention. For example, in a wearable measuring device that measures an electrocardiogram, it is expected that living information such as heartbeat fluctuations in various daily situations can be easily grasped by spending daily life while wearing it as clothes.

  However, when measuring biological information using a wearable biological information measuring device with electrodes attached thereto, the measured biological information, particularly when the measurement subject is performing an exercise operation such as walking or running. The present inventors have newly found that there is a problem that the target information cannot be obtained due to the increase of noise.

  In the measurement of an electrocardiogram, FIG. 1 of Patent Document 1 describes that electrodes are attached to three positions on the front of the human body and one near the base of the neck, and FIG. It is described that electrodes are mounted at two locations near the left and right ends of the left and right clavicles and at two locations near the height of the left and right lowest ribs on the left and right axillary lines. However, the above-described problems during walking and exercise have not been solved.

Special table 2012-519561 gazette JP 2006-61446 A

  In the present invention, in consideration of the above problems, a measurement method capable of measuring an electrocardiogram with reduced noise and provision of an electrocardiogram measurement garment capable of measuring such an electrocardiogram are listed as problems.

The present invention that has solved the above problems is a method for measuring an electrocardiogram of a human body,
The first sensor is brought into contact with the center line of the sternum on the front of the human body, the left anterior axillary line, and the position surrounded by the upper end of the fifth rib and the lower end of the eighth rib,
The second sensor is brought into contact with any position in the region surrounded by the center line of the sternum on the front of the human body, the right anterior axilla line, the upper end of the fifth rib and the lower end of the eighth rib,
Any point on the perpendicular when a perpendicular line is drawn from the midpoint of the line connecting the first sensor center and the second sensor center to the line connecting the first sensor center and the second sensor center toward the head of the human body. An electrocardiogram measurement method characterized in that an electrocardiogram is measured by bringing a third sensor into contact with the position.

In this case, it is preferable that the third sensor is brought into contact with a portion where the left and right second ribs on the front of the human body are in contact with the sternum. The distance between the first sensor and the right anterior axillary line is shorter than the distance between the first sensor and the sternum center line, and the second sensor and the left anterior axillary line are shorter than the distance between the second sensor and the sternum center line. It is also preferable to shorten the distance. It is also preferable that the area of the first sensor to the third sensor is 1 cm ² or more.

It is preferable that electrodes having wirings are used as the first sensor to the third sensor, and the conductive layers of the wirings and the electrodes are formed from the same conductive composition.
It is also preferable that the electrocardiogram is measured by causing the wearer to wear clothes including the first sensor to the third sensor.

The present invention also includes clothes for electrocardiogram measurement, and when the wearer wears these clothes,
The first sensor abuts at any position within the area surrounded by the center line of the rib on the front of the human body, the left anterior axilla line, the upper end of the fifth rib, and the lower end of the eighth rib,
The second sensor abuts at any position within the area surrounded by the center line of the rib on the front of the human body, the right anterior axilla line, the upper end of the fifth rib, and the lower end of the eighth rib,
Any point on the perpendicular when a perpendicular line is drawn from the midpoint of the line connecting the first sensor center and the second sensor center to the line connecting the first sensor center and the second sensor center toward the head of the human body. So that the third sensor comes into contact with
An electrocardiogram measurement garment characterized in that first to third sensors are fixed to the back side of the garment.

  The electrocardiogram measurement method of the present invention makes it possible to measure an electrocardiogram with reduced noise even during exercise by bringing the first sensor to the third sensor into contact with a specific place on the human body. It became possible to grasp. In addition, the electrocardiogram measurement garment of the present invention is configured such that the first sensor to the third sensor abut on a specific position of the human body only by wearing, and the electrocardiogram measurement garment can be exercised only by wearing the electrocardiogram measurement garment. In particular, it became possible to measure an electrocardiogram with reduced noise.

It is explanatory drawing for demonstrating the right armpit line of a human body. It is explanatory drawing for demonstrating the contact position of a 1st sensor-a 3rd sensor. (A) is explanatory drawing which shows electrode arrangement | positioning of the electrocardiogram measurement garment used in the comparative example 1, (b) is explanatory drawing which shows electrode arrangement | positioning of the electrocardiogram garment used in the comparative example 2, (c) is an Example. 2 is an explanatory diagram showing an electrode arrangement of an electrocardiogram measurement garment used in FIG. It is a measurement result of an electrocardiogram when the wearer is in a resting state. It is an electrocardiogram measurement result when a wearer walks at 4 km / h. It is a measurement result of an electrocardiogram when a wearer runs at 8 km / h. It is a measurement result of an electrocardiogram when a wearer runs at 16 km / h.

TECHNICAL FIELD The present invention relates to a method for measuring an electrocardiogram. An electrocardiogram is information that can be recorded as a waveform by detecting changes in the potential caused by the activity of the heart via electrodes on the surface of a living body. Generally, the horizontal axis represents time and the vertical axis represents potential difference. Recorded as a plotted waveform. The waveform that appears in the electrocardiogram for each heartbeat is mainly composed of five typical waves of P wave, Q wave, R wave, S wave, and T wave, in addition to this, U wave exists, and Q wave From the beginning of the wave to the end of the S wave may be referred to as a QRS wave. Among these waves, it is preferable to include an electrode capable of detecting at least an R wave. The R wave shows the excitement of both the left and right ventricles and becomes the wave with the largest potential difference depending on the electrode position. The time from the top of the R wave to the top of the next R wave is generally referred to as RR time, but for one minute using the equation (heart rate) = 60 / (RR time (seconds)). The heart rate per hit can be calculated. That is, it is possible to know the heart rate by providing an electrode capable of detecting an R wave and detecting the R wave. In the present invention, QRS waves are also included in R waves unless otherwise noted.

The electrocardiogram measurement method of the present invention is a method using three sensors: a first sensor, a second sensor, and a third sensor. The number of electrodes is smaller than that of the conventional method, and an electrocardiogram can be measured efficiently at low cost.
In the following description, the direction connecting the head and the foot is the up-down direction, and the direction connecting the abdomen and the back is the front-rear direction (the abdomen is front).

  And in the measuring method of this invention, the positional relationship of a 1st sensor-a 3rd sensor is important, and these positional relationships are demonstrated using FIG. 1 and FIG. The first sensor 1 is brought into contact with any position in the region surrounded by the center line of the sternum on the front of the human body, the right anterior axilla line, the upper end of the fifth rib and the lower end of the eighth rib, and the second sensor 2 The third sensor 3 is brought into contact with the center line of the rib in front of the human body, the left anterior axillary line, and any position within the region surrounded by the upper end of the fifth rib and the lower end of the eighth rib. When a perpendicular line is drawn from the midpoint of the line connecting the center of the first sensor 2 and the center of the second sensor 2 to the line connecting the center of the first sensor 1 and the center of the second sensor 2 toward the head of the human body. It is necessary to abut on any position on the perpendicular line. That is, the first sensor 1, the second sensor 2, and the third sensor 3 draw an isosceles triangle that the third sensor 3 receives. As a result, an electrocardiogram with reduced noise can be measured as will be described later.

  FIG. 1 shows the right anterior axillary line. The (middle) axillary line is an imaginary perpendicular line connecting the axilla to the waist, and the (middle) parallel line drawn 1 inch forward (ventral) of the axillary line is drawn 1 inch behind the front axilla line The parallel line is called the rear axillary line.

  The first sensor 1 and the second sensor 2 are preferably displaced (shifted) toward the axilla line so that the distance from each axilla line is shorter than the distance from the center line of the sternum. The specific distance is difficult to determine because it depends on the physique of the subject, but the first sensor 1 and the second sensor 2 are about 3 to 12 cm (preferably about 4.5 to 7 cm) from each axilla line side, It is preferable to contact the position shifted to the center line side of the sternum. The shift distance may be different between the first sensor 1 and the second sensor 2, but is preferably the same. That is, it is preferable that the distance between the first sensor 1 and the sternum center line and the distance between the second sensor 2 and the sternum center line are the same. In FIG. 2, the 1st sensor 1 and the 2nd sensor 2 are made to contact | abut on the clavicle centerline.

  The vertical position of the first sensor 1 and the second sensor 2 is between the fifth rib and the eighth rib. The vertical position of the first sensor 1 and the second sensor 2 is preferably between the lower end of the fifth rib and the upper end of the eighth rib, more preferably between the upper end of the sixth rib and the upper end of the eighth rib. In FIG. 2, the first sensor 1 and the second sensor 2 are respectively brought into contact with the seventh rib, but may be between the upper and lower positions in the preferable range.

  On the other hand, the third sensor 3 is connected to the line connecting the center of the first sensor 1 and the center of the second sensor 2 from the midpoint of the line connecting the center of the first sensor 1 and the center of the second sensor 2. The perpendicular is brought into contact with any position on the perpendicular when the perpendicular is drawn toward the human head. When the distance between the first sensor 1 and the sternum center line is the same as the distance between the second sensor 2 and the sternum center line, the perpendicular is the center line of the sternum. The third sensor 3 only needs to be on the sternum center line. However, a certain distance between the third sensor 3 and the first sensor 1 and the second sensor 2 has an effect of reducing the electrocardiogram noise. Therefore, the third sensor 3 is preferably brought into contact with a portion where the left and right second ribs and the sternum are in contact with each other (a portion straddling the sternum and the sternum body).

The first to third sensors preferably have an area of 1 cm ² or more. The shape is not particularly limited, but a circle, an ellipse, a square or a rectangle is preferable. In addition, in the case of a rectangle, it is good to round four corners (R is attached). Further, in the case of an ellipse or a rectangle, the long axis or the long side may face either the vertical direction or the direction perpendicular to the vertical direction.

  An electrocardiogram with reduced noise can be measured by bringing the first to third sensors into contact with the specific position and subtracting the potential difference of the first sensor from the potential difference of the second sensor with respect to the third sensor. . That is, the third sensor functions as a ground electrode.

Specifically, the first to third sensors include electrodes (dry electrodes) and wiring. Hereinafter, electrodes and wiring will be described.
In the present invention, the electrode preferably includes a conductive layer capable of detecting electrical information of a living body, and further includes an insulating layer. Moreover, it is preferable to have elasticity so that it can follow the exercise | movement motion of a to-be-measured person. For example, a conductive composition containing a fibrous electrode including a conductive polymer obtained by coating a base fiber with a conductive polymer by impregnation or the like, a conductive filler such as metal powder, and a resin containing stretchability By using a sheet-like electrode formed from the above, an electrode having stretchability can be obtained. Among these, since the sheet-like electrode formed from the conductive composition can use a component having high conductivity such as metal powder, the electrical resistance value is lower than that in the case of using a conductive polymer. It is preferable because it can be obtained and weak electric signals can be detected.

  The electrical resistance value on the electrode surface is preferably 1000 Ω / cm or less, more preferably 300 Ω / cm or less, further preferably 200 Ω / cm or less, and particularly preferably 100 Ω / cm or less. In the sheet-like electrode formed from the conductive composition, the electrical resistance value on the electrode surface can be suppressed to a range of 300 Ω / cm or less.

  Moreover, since the electrode formed from the said conductive composition has a low electrical resistance value, it is possible to make a wiring and an electrode into the same conductive composition, and this is a preferable one aspect | mode of this invention. When the wiring and the electrode are made of the same conductive composition, the wiring width may be 1 mm or more, and more preferably 5 mm or more and 10 mm or less.

  The electrocardiogram measurement method of the present invention can be implemented by using an electrocardiogram measurement garment. This garment is provided with electrodes and wiring on the back side, and each sensor (electrode) is in contact with the wearer's body at the specific position just by wearing. Hereinafter, the electrocardiogram measurement clothes will be described.

It is preferable that the electrode used for the clothes for electrocardiogram measurement in this invention has an insulating layer. For example, a sheet-like form including a first insulating layer and a conductive layer can be used. Moreover, the wiring used by this invention can use the sheet-like thing containing a 1st insulating layer, a conductive layer, and a 2nd insulating layer, for example.
Hereinafter, an example of producing a sheet (stretchable wiring sheet) in which electrodes and wiring are integrated from the same material, which is a preferred embodiment of the present invention, will be described.

(First insulation layer)
In this invention, it is preferable that the 1st insulating layer is formed in the back side of clothes. The first insulating layer is an adhesive surface when the electrode and the wiring sheet are laminated on the garment, and prevents moisture from the outside of the garment from reaching the conductive layer through the cloth when the garment is worn. In addition, although the conductive layer described later in the present invention has good extensibility, when the garment is a material rich in extensibility exceeding the extensibility of the conductive layer, the conductive layer is stretched following the garment. As a result, cracks may occur. The first insulating layer also serves as a stretch stopper that suppresses the stretch of the clothes and prevents the conductive layer from being excessively stretched.

  The resin forming the first insulating layer is not particularly limited as long as it is an insulating resin (insulating resin). For example, polyurethane resin, silicone resin, vinyl chloride resin, epoxy resin Etc. can be preferably used. Among these, polyurethane resins are preferable from the viewpoint of adhesiveness with the conductive layer. In addition, 1 type of resin which forms a 1st insulating layer may be sufficient, and 2 or more types may be sufficient as it.

  In the first insulating layer of the present invention, the insulating resin is dissolved or dispersed in an appropriate solvent (preferably water), and applied or printed on a release paper or release film to form a coating film, It can be formed by evaporating and drying the solvent contained in the coating film. Moreover, the commercially available sheet | seat thru | or film which has the appropriate physical property mentioned later can also be used.

  The thickness of the first insulating layer is preferably 20 to 200 μm, more preferably 50 to 150 μm. If the first insulating layer is too thin, the insulating effect and the anti-elongation effect will be insufficient. On the other hand, if it is too thick, the stretchability of the fabric will be hindered and the thickness of the entire electrode and wiring will be reduced. There is a risk that it will become thick and uncomfortable.

(Conductive layer)
In the present invention, a conductive layer is preferably formed on the first insulating layer. This conductive layer ensures conduction. The conductive layer preferably contains a conductive filler and a resin.

  The conductive filler that forms the conductive layer is preferably a metal powder. Moreover, conductive materials other than metal powder and metal nanoparticles can be used as the conductive filler as necessary.

  As metal powder, silver, gold powder, platinum powder, palladium powder and other precious metal powders, copper powder, nickel powder, aluminum powder, brass powder and other base metal powders, and other kinds of inorganic particles such as base metals and silica are silver. Examples thereof include a plating powder plated with a noble metal, a base metal powder alloyed with a noble metal such as silver. Among these, silver powder and copper powder are preferable from the viewpoint of easily exhibiting high conductivity and price, and it is desirable that silver powder and / or copper powder be the main component (50% by mass or more). In addition, only 1 type may be sufficient as an electroconductive filler, and 2 or more types may be sufficient as it.

  Preferred shapes of the metal powder include known flaky shapes (flaky shapes), spherical shapes, dendritic shapes (dendritic shapes), and agglomerated shapes (shapes in which spherical primary particles are aggregated three-dimensionally). . Among these, flaky, spherical, and aggregated metal powders are particularly preferable.

  The average particle size of the metal powder is preferably 0.5 to 10 μm. If the average particle diameter is too large, it may be difficult to form a desired pattern shape when attempting to form a wiring with a fine pattern. On the other hand, if the average particle size is too small, the metal powder tends to aggregate during formation of the conductive layer, and the raw material cost increases as the particle size decreases, which is not preferable.

  The proportion of the metal powder in the conductive filler is preferably 80% by volume or more, more preferably 85% by volume or more, and still more preferably 90% by volume or more. If the content ratio of the metal powder is too small, it may be difficult to develop sufficiently high conductivity. In the present invention, the volume% of each component is determined by measuring the mass of each solid content of each component contained in the paste and calculating (the mass of each solid content / the specific gravity of each solid content). It is obtained by calculating the volume of minutes.

  As other conductive materials, for example, carbon nanotubes are preferably mentioned, and in particular, the surface has a mercapto group, an amino group, a nitrile group, or a surface treatment with a rubber containing a sulfide bond and / or a nitrile group. Preferably it is. In general, the conductive material itself has a strong cohesive force. In particular, a conductive material having a high aspect ratio as described later has a low dispersibility in the resin, but has a mercapto group, amino group or nitrile group on its surface, or a sulfide bond. Since the surface treatment is performed with rubber containing a nitrile group and / or the affinity for the metal powder is increased, an effective conductive network can be formed together with the metal powder, and high conductivity can be realized.

  The proportion of the conductive material in the conductive filler is preferably 20% by volume or less, more preferably 15% by volume or less, and still more preferably 10% by volume or less. If the content of the conductive material is too large, it may be difficult to uniformly disperse it in the resin, and the conductive material as described above is generally expensive.

  Examples of the metal nanoparticles include silver, bismuth, platinum, gold, nickel, tin, copper, and zinc, and the average particle diameter is preferably 2 to 100 nm. In particular, from the viewpoint of conductivity, copper, silver, platinum, and gold are preferable, and those containing silver and / or copper as a main component (50 mass% or more) are more preferable. Inclusion of metal nanoparticles can be expected to improve conductivity, contribute to rheology adjustment of the conductive paste used to form the conductive layer, and improve printability.

  The proportion of the metal nanoparticles in the conductive filler is preferably 20% by volume or less, more preferably 15% by volume or less, and still more preferably 10% by volume or less. If the content ratio of the metal nanoparticles is too large, it may be easily aggregated in the resin, and generally the metal nanoparticles having a small particle diameter as described above are expensive, so the amount used is limited to the above range. It is desirable.

  The amount of the conductive filler in the conductive layer (in other words, the amount of the conductive filler in the total solid content of the conductive paste for forming the conductive layer) is preferably 15 to 45% by volume, more preferably 20 ~ 40% by volume. If the amount of the conductive filler is too small, the conductivity may be insufficient. On the other hand, if the amount is too large, the stretchability of the conductive layer tends to decrease, and the obtained ECG measurement clothes are stretched. In addition, cracks or the like may occur in the conductive layer, and as a result, good conductivity may not be maintained.

  The resin forming the conductive layer preferably contains at least a rubber containing a sulfur atom and / or a rubber containing a nitrile group. Sulfur atoms and nitrile groups have a high affinity with metals, and rubber is highly stretchable and can prevent cracks even when stretched. It can be retained and can exhibit excellent conductivity. A rubber containing a nitrile group is more preferable from the viewpoint of a defective rate described later. In addition, only 1 type may be sufficient as resin which forms a conductive layer, and 2 or more types may be sufficient as it.

  The rubber containing a sulfur atom is not particularly limited as long as it is a rubber or elastomer containing sulfur. The sulfur atom is contained in the form of a sulfide bond or disulfide bond of the main chain of the polymer, a mercapto group of a side chain or a terminal. Specific examples of the rubber containing a sulfur atom include polysulfide rubber, polyether rubber, polyacrylate rubber, and silicone rubber containing a mercapto group, sulfide bond or disulfide bond. In particular, polysulfide rubber, polyether rubber, polyacrylate rubber, and silicone rubber containing a mercapto group are preferable. Further, a resin in which a sulfur-containing compound such as pentaerythritol tetrakis (S-mercaptobutyrate), trimethylolpropane tris (S-mercaptobutyrate), or a mercapto group-containing silicone oil is blended in a rubber having no sulfur atom is used. You can also. As a commercially available product that can be used as a rubber containing a sulfur atom, “Thicol (registered trademark) LP” manufactured by Toray Fine Chemical Co., Ltd., which is a liquid polysulfide rubber, is preferable. As for content of the sulfur atom in the rubber | gum containing a sulfur atom, 10-30 mass% is preferable.

  The rubber containing a nitrile group is not particularly limited as long as it is a rubber or elastomer containing a nitrile group, but acrylonitrile butadiene copolymer rubber which is a copolymer of butadiene and acrylonitrile is preferably exemplified. As a commercially available product that can be used as a rubber containing a nitrile group, “Nipol (registered trademark) 1042” manufactured by ZEON CORPORATION is preferably exemplified. The amount of nitrile groups in the rubber containing nitrile groups (particularly, the amount of acrylonitrile in the acrylonitrile butadiene copolymer rubber) is preferably 18 to 50% by mass, and more preferably 28 to 41% by mass. When the amount of bound acrylonitrile in the acrylonitrile butadiene copolymer rubber is large, the affinity with metals increases, but the rubber elasticity contributing to stretchability decreases conversely.

  The resin forming the conductive layer is preferably composed only of a rubber containing a sulfur atom and / or a rubber containing a nitrile group, but does not impair the conductivity, stretchability, applicability at the time of forming the conductive layer, etc. In the range, a resin other than a rubber containing a sulfur atom and a rubber containing a nitrile group may be included. When other resins are also included, the total amount of rubbers containing sulfur atoms and / or rubbers containing nitrile groups is preferably 95% by mass or more, more preferably 98% by mass in all resins. As described above, it is more preferable that the content be 99% by mass or more.

  The amount of the resin occupying the conductive layer (in other words, the amount of the resin solid occupying in the total solid content of the conductive paste for forming the conductive layer) is preferably 55 to 85% by volume, more preferably 60 to 80%. % By volume. When the amount of the resin is too small, the conductivity is increased, but the stretchability tends to be deteriorated. On the other hand, when the amount of the resin is too large, the stretchability is improved, but the conductivity tends to decrease.

  In the conductive layer of the present invention, a composition (conductive paste) obtained by dissolving or dispersing the above components in an appropriate organic solvent is directly formed on the first insulating layer in a desired pattern (electrode and subsequent wiring pattern). It can be formed by applying or printing to form a coating film, and then volatilizing and drying the organic solvent contained in the coating film. Alternatively, the conductive paste is applied or printed on a release sheet or the like to form a coating film, and then the organic solvent contained in the coating film is volatilized and dried to form a sheet-like conductive layer in advance. Alternatively, it may be laminated on the first insulating layer in a desired pattern.

  The conductive paste can be prepared by appropriately adopting a conventionally known method for dispersing powder in a liquid and uniformly dispersing the conductive filler in the resin. For example, after mixing a metal powder, a dispersion of a conductive material, and a resin solution, they may be uniformly dispersed by an ultrasonic method, a mixer method, a three-roll mill method, a ball mill method, or the like. These means can be used in combination.

  The method for applying or printing the conductive paste on the first insulating layer is not particularly limited. For example, the coating method, the screen printing method, the lithographic offset printing method, the ink jet method, the flexographic printing method, the gravure printing method, and the gravure offset printing. A printing method such as a method, a stamping method, a dispensing method, or a squeegee printing can be employed.

  In order to volatilize and dry the organic solvent after forming the coating film with the conductive paste, for example, heating may be performed in the air, in a vacuum atmosphere, in an inert gas atmosphere, or in a reducing gas atmosphere. The heating temperature may be selected in the range of, for example, 20 to 200 ° C. in consideration of the required conductivity, the heat resistance of the fabric used for the electrocardiogram measurement clothes, the insulating layer, and the like.

  The film thickness of the conductive layer is preferably 40 to 150 μm, more preferably 50 to 100 μm. If the conductive layer is too thin, it is likely to deteriorate due to repeated expansion and contraction of the wiring sheet including the electrodes, and there is a risk that the conduction may be hindered or blocked. May become thick and may interfere with comfort.

(Second insulation layer)
In the present invention, a second insulating layer is formed on the conductive layer in the wiring portion. Thereby, for example, when an electrocardiogram measurement garment made using an elastic wiring sheet is worn, moisture such as rain and sweat is prevented from touching the conductive layer of the wiring. Note that the electrode portion does not require the second insulating layer.

  As resin which forms a 2nd insulating layer, the thing similar to resin which forms the 1st insulating layer mentioned above is mentioned, A preferable resin is also the same. Only one type of resin forming the second insulating layer may be used, or two or more types may be used. The resin that forms the first insulating layer and the resin that forms the second insulating layer may be the same or different, but it is the same that the coverage of the conductive layer and the wiring sheet are the same. This is preferable from the viewpoint of reducing the damage to the conductive layer due to the bias of stress during expansion and contraction. As described above, the second insulating layer can be formed in the same manner as the first insulating layer.

  The film thickness of the second insulating layer is preferably 20 to 200 μm, more preferably 20 to 150 μm. If the second insulating layer is too thin, the insulation effect will be insufficient due to repeated stretching of the clothes, while if it is too thick, the stretchability of the wiring sheet will be hindered and the thickness of the entire wiring will be increased, making it comfortable to wear. There is a risk of obstruction.

  In a preferred embodiment of the stretchable wiring sheet of the present invention, the thickness of the wiring portion is 400 μm or less, more preferably 300 μm or less, and even more preferably 200 μm or less. The thickness of the conventional wiring is 400 μm or more, and tends to give the wearer a feeling of foreign matter when contacting the skin side. On the other hand, the stretchable wiring sheet of the present invention is high due to a conductive filler mainly composed of metal powder and a conductive layer formed of rubber containing sulfur atoms and / or rubber containing nitrile groups as a resin. There is a feature that the thickness can be suppressed to 400 μm or less while having conductivity.

  The stretchable wiring sheet of the present invention can be laminated on clothes and the like. By laminating the first insulating layer and the conductive layer on the back side of the garment and the second insulating layer in the wiring portion, an electrocardiogram measurement garment using the stretchable wiring sheet of the present invention can be obtained. It is preferable to laminate the first insulating layer side with respect to the back side of the clothes, and the laminating method is not particularly limited as long as it is a conventionally known laminating method such as laminating with an adhesive or laminating by hot pressing. However, a lamination method that does not hinder the stretchability of the stretchable wiring sheet is preferable from the viewpoints of fit to the body when worn for electrocardiogram measurement, followability during exercise and operation, and the like.

The cloth of the garment is not particularly limited, and a woven or knitted fabric or a nonwoven fabric composed of various conventionally known natural fibers, synthetic fibers, and semi-synthetic fibers can be used. From the standpoints of fit to the body when worn for electrocardiogram measurement and followability during exercise / operation, fabrics that do not hinder the stretchability of the stretchable wiring sheet are preferred. A knitted fabric made of synthetic fibers is preferable, and a more preferable knitted fabric is a 2-way tricot. The thickness of the dough may be appropriately set according to the use, but is preferably 300 to 1200 μm, more preferably 500 to 1000 μm. Further, the basis weight of the dough may be appropriately set according to the use, but is preferably 150 to 250 g / m ² , more preferably 170 to 220 g / m ² .

(Electrocardiogram clothing)
The clothes for electrocardiogram measurement of the present invention are configured such that the wearer wears the first to third sensors (electrodes) in contact with the specific position of the wearer. You may use so that wiring may be distribute | arranged not only on the inner side (body side) of clothing but on the outer side of clothing. The means for measuring the first to third sensor (electrode) electrocardiograms and the mechanism for analyzing the measured information are connected by wiring. As a mechanism for analyzing the measured information, a conventionally known analysis device (such as a heart rate monitor, an electrocardiograph, or an electromyograph) according to the purpose may be employed, and includes means for transmitting information to an external analysis device. .

  The electrocardiogram measurement method of the present invention can measure an electrocardiogram simply by wearing the electrocardiogram measurement clothes of the present invention by the person being measured. Moreover, since the 1st-3rd sensor (electrode) is arrange | positioned in the specific place, even if a wearer exercise | movements intensely, such as jogging and a marathon, the noise of an electrocardiogram can be suppressed low.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the following examples, but may be appropriately modified within a range that can meet the purpose described above and below. Of course, it is possible to implement them, and they are all included in the technical scope of the present invention.

  Insulating layer forming resins and conductive pastes used in the following examples and comparative examples were prepared as follows.

(Conductive paste)
Resin (nitrile group-containing rubber “Nipol (registered trademark) 1042” acrylonitrile content 33.3 mass%) manufactured by Nippon Zeon Co., Ltd. was dissolved in diethylene glycol monomethyl ether acetate, and silver particles (“aggregated silver powder G manufactured by DOWA Electronics Co., Ltd.) were dissolved in this solution. −35 ”and an average particle size of 5.9 μm) were dispersed (resin 70 vol%, silver particles 30 vol%), and this was kneaded by a three roll mill to obtain a conductive paste.

(Polyurethane sheet)
The following polyurethane sheets were used.
・ Polyurethane sheet with hot melt: “Mobilon (registered trademark) MF-103F” manufactured by Nisshinbo Co., Ltd.
Polyurethane hot melt sheet: “Mobilon (registered trademark) MOB100” manufactured by Nisshinbo Co., Ltd.

(Preparation of conductive layer)
The said electrically conductive paste was apply | coated on the release sheet, and the sheet-like electrically conductive layer with a release sheet was produced by drying in 120 degreeC hot-air drying oven for 30 minutes or more.

(Preparation of first insulating layer and conductive layer)
Next, a polyurethane hot melt sheet (Mobilon MOB100) is placed on the conductive layer with a release sheet using a hot press machine under the conditions of a pressure of 0.5 kgf / cm ² , a temperature of 130 ° C., and a press time of 20 seconds. Laminated (bonded). After pasting together a polyurethane hot melt sheet (Mobilon MOB100), the release film was peeled off to obtain a conductive sheet with polyurethane hot melt. Then, on the area of the polyurethane sheet with hot melt (Mobilon MF-103F), an electrode with a diameter of 30 mm and a wiring size with a width of 5 mm having a length from each electrode position to the bottom of the shirt shown in Table 1 The cut-out conductive sheet with polyurethane hot melt was bonded under the lamination conditions of the hot press machine to form a part having a first insulating layer and a conductive layer (electrode). Next, a first insulating layer is formed on the back side of a shirt made of 2-Way tricot fabric (“KNZ2740” manufactured by Gunsen Co., Ltd., nylon yarn: urethane yarn = 63%: 37% (mixing ratio), basis weight 194 g / m ² ). Parts with a conductive layer were laminated.

(Preparation of the second insulating layer)
Next, by laminating the same hot melted polyurethane sheet as that having formed the first insulating layer in a region covering the wiring portion of the part provided with the first insulating layer and the conductive layer, the conductive layer of the wiring portion is laminated. A shirt for electrocardiogram measurement in which a second insulating layer is formed on the electrode, and an electrode having the first insulating layer / conductive layer configuration and a wiring having the first insulating layer / conductive layer / second insulating layer configuration are integrated. Produced.

(Example 1, Comparative Examples 1-2)
A test subject (one healthy adult male, 23 years old) was made to wear the above-mentioned shirt for electrocardiogram measurement, and the electrocardiogram was measured by the method described in Table 1. In addition, as for arrangement | positioning of an electrode, Fig.3 (a) is the comparative example 1, FIG.3 (b) is the comparative example 2, FIG.3 (c) is Example 1. FIG. This is an example in which wiring is integrated with a circular electrode. The electrocardiogram measurement results are shown in FIGS. In Comparative Example 2, commercial power supply noise was removed with a digital filter after measurement. 4-7, in Example 1, the electrocardiogram was able to be measured neatly without noise even when traveling at 16 km / h. In Comparative Example 1, an electrocardiogram could be measured up to traveling 8 km / h, but in Comparative Example 2, an electrocardiogram could be measured only in a resting position.

Claims (10)

  An electrocardiogram measurement garment comprising an electrocardiogram measurement electrode and wiring formed on a 2-way tricot fabric.   The garment for electrocardiogram measurement according to claim 1, wherein the 2-way tricot fabric has a thickness of 300 μm or more and 1200 μm or less.   The garment for electrocardiogram measurement according to claim 1, wherein the thickness of the 2-way tricot fabric is 500 µm or more and 1000 µm or less. The garment for electrocardiogram measurement according to any one of claims 1 to 3, wherein the basis weight of the 2-way tricot fabric is 150 g / m ² or more and 250 g / m ² or less. The garment for electrocardiogram measurement according to any one of claims 1 to 3, wherein the basis weight of the 2-way tricot fabric is 170 g / m ² or more and 220 g / m ² or less. The structure of the electrode is a first insulating layer / conductive layer,
The configuration of the wiring is the first insulating layer / the conductive layer / second insulating layer,
The electrocardiogram clothing according to any one of claims 1 to 5, wherein the electrode and the wiring are integrated. 2-way tricot dough according to any of claims 1 to 5,
A sheet with a first hot melt comprising a first hot melt layer and a first insulating layer;
A conductive sheet with a hot melt comprising a conductive layer and a second hot melt layer laminated on the conductive layer;
A sheet with a second hot melt comprising a third hot melt layer and a second insulating layer;
The garment for electrocardiogram measurement, wherein the 2-way tricot fabric, the sheet with the first hot melt, the conductive sheet with the hot melt, and the sheet with the second hot melt are laminated in this order.   The garment for electrocardiogram measurement according to claim 6 or 7, wherein the first insulating layer and the second insulating layer are polyurethane sheets. It is a manufacturing method of the clothes for electrocardiogram measurement according to claim 7,
Forming a conductive layer on the release sheet to obtain a conductive layer with a release sheet;
Laminating a second hot melt layer on the conductive layer with the release sheet to obtain a conductive sheet with hot melt,
Cutting a part of the conductive sheet with hot melt,
A step of obtaining an electrode and a member for forming a wiring by laminating the conductive sheet with hot melt after the cutting step on a sheet with the first hot melt comprising a first hot melt layer and a first insulating layer;
Laminating a sheet with a second hot melt comprising a third hot melt layer and a second insulating layer in a region covering the electrode and the wiring part of the wiring forming member,
A method for producing a garment for electrocardiogram measurement, comprising a step of laminating the electrode and the wiring forming member on the 2-Way tricot fabric.   The manufacturing method of the clothes for electrocardiogram measurement of Claim 9 including the process of peeling the release sheet of the said conductive layer with a release sheet.

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