Clothing

Abstract

To provide clothing capable of detecting a biological signal, which can stably and clearly acquire a desired electrical signal of an organism, especially, an electrocardiogram signal, without applying excessive pressing pressure at the time of intense movement.SOLUTION: Clothing capable of detecting a biological signal includes: a body fabric; a knitted part having a high-contraction structure more than that of the body fabric; a sheet-like electrode fixed to the knitted part; and a conductor part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to clothing. [Background technology]

[0002] BACKGROUND ART Electrode-equipped clothing that is used when collecting data such as electrocardiograms and electromyograms from a subject has been known (see, for example, Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-158709 [Patent Document 2] Japanese Patent Application Publication No. 2017-082361 [Patent Document 3] Japanese Patent Publication No. 2020-146336 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional clothing capable of detecting biological signals, changes in the contact state between the sheet electrodes and the skin can cause electrical noise during strenuous activities such as sports, making it difficult to obtain clear biological signals. For this reason, in everyday use, the preferred method is to measure biosignals over long periods of time by contacting rubber or other materials impregnated with conductive materials such as silver with the body. This method requires a certain level of pressure to be generated between the electrodes and the body to prevent the electrodes from shifting due to sweat or movement, and the device has a structure that tightens the body to generate this pressure. This structure can hinder breathing, reduce performance in sports, and reduce blood oxygen levels in everyday life.

[0005] The present invention has been made in consideration of the above-mentioned background, and its purpose is to provide clothing that can detect biological signals and that can stably and clearly obtain desired biological electrical signals, particularly electrocardiographic signals, without applying excessive pressure even during strenuous activity. [Means for solving the problem]

[0006] The present inventors have conducted extensive research to achieve the above object, and as a result have completed the present invention. Thus, the present invention provides the following inventions. 1. Clothing capable of detecting biological signals, characterized in that it comprises a main fabric, a knitted fabric portion having a more stretchable structure than the main fabric, a sheet-like electrode fixed to the knitted fabric portion, and a conductive wire portion. 2. The garment described in 1 above, wherein the knitted fabric portion has an accordion-like structure. 3. The clothing according to 1 or 2 above, wherein the sheet-like electrode comprises conductive fibers and non-conductive fibers having a single fiber diameter of 1 μm or less. 4. The clothing according to claim 3, wherein the non-conductive fibers are polyester fibers. 5. The clothing according to any one of 1 to 4 above, wherein the conductor portion includes a conductive portion and an insulating portion. 6. The garment described in claim 5, wherein the insulating portion comprises polyester fibers. 7. The clothing according to any one of 1 to 6 above, wherein the connection portion between the sheet-like electrode and the conductor portion is covered with an insulating sheet. 8. The clothing according to any one of 1 to 7 above, wherein a cushioning material is interposed between the sheet-like electrode and the knitted fabric portion. 9. A garment having a front body and a back body and including two or more of the sheet-like electrodes, wherein the two sheet-like electrodes are located above the center of a line connecting the lowest point of the armhole of the front body to the hemline, and are located on the side of the center line that divides the front body equally into left and right halves and the midpoint of the side lines on both the left and right ends. The garment is described in any of 1 to 8 above. [Effects of the Invention]

[0007] According to the present invention, clothing is provided that allows desired biological electrical signals, particularly electrocardiogram signals, to be obtained stably and clearly even during strenuous activity. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing the inside (living body side) of the front body of an example of clothing of the present invention. [Figure 2] 1 is a schematic diagram showing the inside (living body side) of the back body of an example of clothing of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments. When describing embodiments of the present invention with reference to the drawings, the configuration of the embodiment is not limited to the configuration shown in the drawings. Furthermore, the sizes of components in each drawing are conceptual, and the relative size relationships between components are not limited to these.

[0010] The present invention is clothing capable of detecting biological signals, characterized in that it comprises a main fabric, a knitted fabric portion (hereinafter sometimes simply referred to as "knitted fabric") having a more stretchable structure than the main fabric, a sheet-like electrode fixed to the knitted fabric portion, and a conductive wire portion.

[0011] Here, the sheet-like electrode is preferably rectangular, but may of course be any other shape such as square, circular, or triangular. The sheet-type electrode includes, for example, a conductive portion and a non-conductive portion, and has an exposed portion (i.e., the surface that comes into direct contact with the skin). The thickness of the sheet electrode is preferably 1.0 mm or less (more preferably 0.1 to 0.5 mm), because the thinner the electrode, the easier it is to conform to the unevenness and curvature of the skin and adhere closely to it.

[0012] When the sheet-like electrode of the present invention includes a conductive portion and a non-conductive portion, examples of methods for forming the conductive portion and the non-conductive portion include a method of interlacing or interweaving conductive fibers with non-conductive fibers, a method of forming a conductive portion by partially impregnating or printing a conductive material on a woven or knitted fabric made of non-conductive fibers, and a method of forming a conductive portion by partially printing a conductive material on a non-conductive film.

[0013] In this case, if the non-conductive portion contains non-conductive fibers with a single fiber diameter of 1 μm or less (preferably 10 to 800 nm), the surface of the sheet-like electrode becomes flat, the contact area with the skin increases, and adhesion to the skin is improved, which is preferable. In particular, it is preferable that the non-conductive portion contains 30% or more (more preferably 50% or more) of such non-conductive fibers. It is more preferable that the non-conductive fibers are made of polyester fibers. Note that, as the non-conductive fibers with a single fiber diameter of 1 μm or less, Nanofront (registered trademark) manufactured by Teijin Frontier Co., Ltd., which has a single fiber diameter of 700 nm, is preferred. The sheet-like electrode preferably contains conductive fibers and non-conductive fibers with a single fiber diameter of 1 μm or less, and more preferably is made by interknitting or interweaving conductive fibers and non-conductive fibers with a single fiber diameter of 1 μm or less.

[0014] The conductive fibers constituting the conductive portion of the sheet-like electrode are not particularly limited, and any known conductive fibers can be used. For example, those described in Japanese Patent No. 6185638 may be used. Specific examples of conductive fibers include metal-plated fibers, conductive polymer fibers, metal fibers, carbon fibers, slit fibers, and conductive material-containing fibers. One type of conductive fiber may be used alone, or two or more types may be used in combination. Examples of metal-plated fibers include synthetic fibers whose surfaces are coated with metals such as silver, copper, gold, and stainless steel, or alloys containing at least one of these metals. Preferred synthetic fibers to be metal-plated include nylon fibers and polyester fibers. Commercially available silver-plated nylon yarns such as "AGposs" (product name) manufactured by Mitsufuji Co., Ltd. may also be used.

[0015] The knitted fabric portion for fixing the sheet-like electrode is a knitted fabric having a more stretchable structure than the main fabric, and a knitted fabric having a bellows structure as described in Japanese Patent No. 5451193 is particularly preferred. Knitted fabrics having such a bellows structure are also called "accordion fabrics" and have a structure in which mountain folds and valley folds are successively formed, and have excellent stretchability in the direction in which the mountain folds and valley folds are successively formed. The dimensions of such a knitted fabric portion are preferably an outer width of 5 to 20 cm and a length of 5 to 30 cm. Here, "having a more stretchable structure than the body fabric" means that the stretch rate is greater than that of the body fabric when a certain load is applied in the stretch direction. The stretch rate can be obtained, for example, by measuring in accordance with JIS L 1096 "Testing methods for woven and knitted fabrics." Examples of fibers constituting the knitted fabric portion include polyester fibers, polyurethane fibers, etc. The knitted fabric portion may contain only one type of fiber, or may contain two or more types of fiber.

[0016] A knitted fabric having such an accordion-like structure can be manufactured by a method described in, for example, Japanese Patent No. 5451193. That is, for example, a denbigh knitted section (front-side main knitted section) of a predetermined width is knitted at predetermined intervals in the weft direction using the front needles of a double Raschel knitting machine, while a denbigh knitted section (back-side main knitted section) of a predetermined width is knitted at predetermined intervals in the weft direction using the back needles. Furthermore, the phase of the parallel back-side main knitted sections is shifted in the weft direction relative to that of the front-side main knitted sections, and each back-side main knitted section is knitted at a midpoint between the front-side main knitted sections. In this case, it is preferable to join the side edges of adjacent front-side main knitted sections and back-side main knitted sections in the warp direction using double chain stitch or double denbigh knitting (joined stitch section), and to knit selvedge sections on both sides of the knitted fabric using the same knitting structure as the joined stitch section. An example of a commercially available knitted fabric having an accordion-like structure is Accordio (product name) from Inoue Ribbon Kogyo Co., Ltd.

[0017] Furthermore, the method of fixing the sheet-like electrode to the knitted fabric portion is preferably such that only the outer periphery of the sheet-like electrode is fixed to the knitted fabric portion. If the sheet-like electrode and the knitted fabric portion are fixed over the entire surface, the sheet-like electrode will not be able to adhere to the skin independently of the knitted fabric portion, which may reduce the adhesion between the sheet-like electrode and the skin (integrating the electrode and the knitted fabric portion may make it difficult for the sheet-like electrode to follow the unevenness and curvature of the skin). The method for fixing the sheet-like electrode and the knitted fabric portion is not particularly limited, but examples include a method in which a single-sided thermal transfer sheet is attached to the outer periphery of the electrode in the form of an outer frame, a method in which a double-sided thermal transfer sheet cut into a frame shape is sandwiched between the sheet-like electrode and the knitted fabric portion and adhered, and a method in which the outer periphery of the sheet-like electrode and the knitted fabric portion are sewn together with sewing thread.

[0018] It is also preferable that a cushion material be interposed between the sheet-like electrode and the knitted fabric portion. This cushion material has the effect of pressing the sheet-like electrode against the skin and also has the effect of making it easier for the sheet-like electrode to deform and conform to the unevenness and curvature of the skin. From this viewpoint, the thickness of the cushion material is preferably 5 mm or more, and more preferably 5 to 20 mm. Furthermore, from the viewpoint of conformability, it is preferable that the cushion material is not fixed to either the sheet-like electrode or the knitted fabric portion.

[0019] The body fabric of the clothing is not particularly limited, and may be a woven or knitted fabric made of polyester fiber, nylon fiber, cotton, etc. In particular, stretchable woven or knitted fabrics containing polytrimethylene terephthalate fiber, composite fiber containing polytrimethylene terephthalate as one component, elastic fiber (e.g., polyurethane elastic yarn), etc. are preferred.

[0020] The garment of the present invention can be obtained, for example, by sewing the body fabric and the knitted fabric portion together to form a garment body, fixing a sheet-like electrode to the knitted fabric portion, and attaching a conductive wire portion to the sheet-like electrode.

[0021] Here, the conductor portion preferably includes a conductive portion and an insulator portion. In this case, the conductive portion is preferably composed of the conductive fiber as described above. Examples of the conductive fiber include the same conductive fibers as those used in the conductive portion of the sheet-like electrode described above. On the other hand, the insulator portion preferably includes synthetic fibers such as polyester fibers and nylon fibers. Among these, it is more preferable that the insulator portion includes polyester fibers. The conductor portion may be, for example, a binder tape containing the synthetic fiber with conductive fibers sewn onto one side thereof, in which case the binder tape constitutes the insulating portion and the conductive fibers constitute the conductive portion.

[0022] When the conductor portion includes a conductive portion and an insulator portion, it is preferable that the conductive portion of the conductor portion contacts the conductive portion of the sheet-like electrode to form a connection portion between the sheet-like electrode and the conductor portion. It is also preferable that the connection portion between the sheet-like electrode and the conductor portion is covered with an insulating sheet. Covering the connection portion with an insulating sheet suppresses noise when detecting a biological signal. Note that the thermal transfer sheet that fixes the sheet-like electrode to the knitted fabric portion may also serve as the insulating sheet that covers the connection portion between the sheet electrode and the conductor portion.

[0023] The end of the conductor portion opposite to the connection portion with the sheet-like electrode is preferably connected to a member (for example, a snap button) electrically connected to a measuring device (for example, an electrocardiogram measuring device).

[0024] Examples of clothing capable of detecting biological signals include clothing that includes two or more sheet electrodes, and specifically, for example, clothing that includes at least a sheet electrode that is an anode and a sheet electrode that is a cathode. More preferably, the garment is a garment (eg, a top) having a front and a back.

[0025] Furthermore, when the garment has a front and a back body, the position of the sheet-like electrode relative to the garment is preferably located above the center of the line connecting the lowest point of the armhole of the front body to the hemline, and on the side of the center line that divides the front body equally into left and right halves and the midpoint between the side lines on both the left and right ends, as shown in Figure 1. By providing the sheet-like electrode in this position, the electrocardiogram signal is less likely to be too weak compared to other positions, and when detecting the electrocardiogram signal, it is less likely that the electrode will be located over large muscles such as the pectoral muscles or abdominal muscles, making it easier to pick up myoelectric signals.

[0026] FIG. 1 is a schematic diagram showing the inside of the front body of an example of clothing of the present invention, and FIG. 2 is a schematic diagram showing the inside of the back body of an example of clothing of the present invention. The garment 10 shown in Figures 1 and 2 is a top (i.e., an upper garment) made up of a front body 10A and a back body 10B. The garment body of the garment 10 is made up of a body fabric 12 and a knitted fabric portion 14 that has a more stretchy structure than the body fabric 12. The garment 10 has two knitted fabric portions 14. Specifically, one knitted fabric portion 14 is provided on each of the two side seams 10L that connect the front body 10A and the back body 10B, above the center of a straight line connecting the lowest point 10U of the armhole 10S of the front body 10A to the hemline 10H.

[0027] A sheet-like electrode 16 is provided in each of the central portions of the two knitted fabric portions 14 on the inside (i.e., living body side) of the garment 10. That is, as shown in Fig. 1, the garment 10 has two sheet-like electrodes 16, and the two sheet-like electrodes 16 are provided on each of the left and right side seams 10L, one above the center of a straight line connecting the lowest point 10U of the armhole 10S to the hemline 10H. As shown in Fig. 2, one end of a conductor 18 is connected to each of the two sheet-like electrodes 16. The other end of the conductor 18 is connected to a snap button 20 provided on the upper back on the inside (i.e., living body side) of the back body 10B. The snap button 20 can be connected to a measuring device (not shown).

[0028] In the clothing 10, electrical signals emitted from the living body wearing the clothing 10 are detected by two sheet-like electrodes 16, and are sent via the conductor portion 18 and snap button 20 to a measuring device for processing.

[0029] In the garment 10, the sheet-like electrodes 16 are provided on the side seams 10L, but this is not limitative. As described above, the sheet-like electrode 16 is preferably located above the center of the straight line connecting the lowest point 10U of the armhole 10S of the front body 10A to the hem line 10H, and on the side of the side line 10L with respect to the midpoint between the center line 10M that divides the front body 10A equally into left and right halves and the side lines 10L at both ends of the left and right sides.

[0030] Although the garment 10 is made up of a front body 10A and a back body 10B and does not have sleeves, the garment is not limited to this and may have sleeves.

[0031] By virtue of the above-described configuration, the clothing of the present invention allows vibrations of the clothing to be absorbed by the highly elastic knitted fabric portion even during strenuous activity, enabling the desired biological electrical signals, particularly electrocardiographic signals, to be obtained stably and clearly. [Example]

[0032] Examples and comparative examples of the present invention will be described in detail below, but the present invention is not limited to these. The measurement items in the examples were measured by the following methods.

[0033] (1) Heart rate measurement The Teijin Frontier Sensing DSP wireless ECG / HR logger (acceleration / angular velocity) SS-ECGHRAG was connected to the clothing via snap buttons, and electrocardiogram waveforms and heart rates were measured at rest and during exercise. Heart rate measurement was evaluated according to the following criteria. The measurement frequency was set to 1 kHz. A ⇒ The heart rate was calculated accurately for all data during exercise. B ⇒ Heart rate was calculated accurately using data between 80% and 100% during exercise. C ⇒ Heart rate was calculated accurately using data between 50% and 80% during exercise. D ⇒ Heart rate was accurately calculated using data less than 50% during exercise. The measurement process consisted of three minutes of rest, followed by one minute of twisting exercise, followed by one minute of full-speed arm swings. (2) Thickness Measurement was performed according to the method specified in JIS L1096-2010 8.4 Method A. (3) Fineness Measured according to JIS L1013-2021 8.3.1 Correct fineness.

[0034] [Example 1] Using a known double raschel knitting machine (24 gauge) with two rows of needle beds on the front (face) side and the back (back) side, a double denbi knit was knitted using commercially available polyester yarn-dyed false twist yarn 167 dtex / 48 on the face needles, and at the same time, polyurethane (Leuca) 235 dtex / 1 was inserted with two needles to form the face main knitting section, with each yarn inserted at a 4-in / 4-out spacing in the weft direction. Similarly, on the back needles, a double Denbigh stitch was knitted using 167 dtex / 48 yarns of commercially available polyester yarn-dyed false-twisted yarn, and at the same time, a back main knitted section was insert knitted with 235 dtex / 1 yarn of polyurethane (Leuca) using two needles, with each yarn insertion spaced 4 in 4 out in the weft direction. Furthermore, the phase of the parallel back main knitted sections was shifted weftwise relative to that of the front main knitted section, so that each back main knitted section was positioned midway between the front main knitted sections. At the same time, the side edges of adjacent front main knitted sections and the side edges of the back main knitted sections were joined in the warp direction using double chain stitches with commercially available yarn-dyed false-twisted yarn 167 dtex / 48. On both sides of the knitted fabric, a full set of eight double chain stitches, identical to the joined sections, was knitted using commercially available yarn-dyed false-twisted yarn 167 dtex / 48. At the same time, selvage sections were insert knitted with 167 dtex / 48 yarn of commercially available yarn-dyed false-twisted yarn using three needles, to obtain a greige machine. The obtained grey fabric was dry-heat set (temperature: 150°C, time: 35 seconds) and cut to a size of 10 cm wide x 13 cm long to form a knitted fabric part (highly stretchable knitted fabric) that was an accordion-shaped knitted fabric.

[0035] Next, using a 28G Russell knitting machine (narrow width knitting machine), 78 dtex / 34 silver-plated conductive nylon yarn was arranged in the center (width 0.5 cm), and an interlaced blend yarn of 78 dtex / 16,720 ultra-fine polyester fiber (Nanofront (registered trademark) manufactured by Teijin Frontier Co., Ltd.) with a single fiber diameter of approximately 700 nm and 33 dtex / 12 regular polyester fiber was used in the other parts, with the back reed weave being 10 / 01 and the front reed weave being 12 / 10 to produce a knitted fabric (total width 4 cm), which was then cut to a length of 6 cm to form a sheet electrode.

[0036] On the other hand, a bare jersey knit fabric was knitted using a 28G single circular knitting machine with 84 dtex / 72 strands of polyester false twist crimped yarn and 44 dtex / 1 strand of polyurethane elastic yarn at a draft rate of 2.5 times the polyurethane elastic yarn, and this knit fabric was used as the body fabric (clothing fabric).The highly stretchable knit fabric was placed on both sides of the garment so that the width (stretch) direction was vertical to the body, to produce a medium-sized clothing body.

[0037] Next, as shown in Figure 1, the sheet electrode was attached to the inside (facing the human body) of the knitted fabric (highly stretchable knitted fabric) of the obtained medium-sized garment body using a thermal transfer sheet, and a 10 mm-thick low-resilience urethane sponge was inserted between the knitted fabric and the sheet electrode as a cushioning material. The thermal transfer sheet was a urethane sheet coated with adhesive, and the knitted fabric and sheet electrode were thermally bonded together using a heat press at 160°C. The exposed portion of the sheet electrode measured 4.5 cm x 3 cm.

[0038] At this time, a conductor portion was prepared by sewing the same silver-plated nylon thread (conductive fiber) used in manufacturing the sheet-like electrode onto one side of a polyester fiber binder tape, and by arranging one end of the conductor portion so that it was in contact with the sheet-like electrode and the other end of the conductor portion was in contact with a snap button, as shown in Figure 2, the sheet-like electrode was connected to the snap button on the upper back on the inside (human body side) and connected to an electrocardiogram measuring device (measuring device) via the snap button. In this way, clothing (1) of Example 1 was obtained. In clothing (1), the connection portion between the sheet-like electrode and the conductor portion was covered with a thermal transfer sheet, which was an insulating sheet.

[0039] This garment (1) was worn so that the sheet electrodes were in direct contact with the skin, and electrocardiograms were measured at rest and during exercise. The data were then processed using a high-pass filter with a cutoff frequency of 5 Hz and a fourth-order Savitzky-Golay filter. Because the amplitude of the electrocardiogram changes depending on the degree of contact between the sheet electrodes and the skin, the envelope was calculated after full-wave rectification to determine the threshold. Peak values ​​of the waveform exceeding the threshold were detected as R waves, and the RR intervals were calculated. Since these included abnormal values, the first- and second-order derivatives of the RR intervals were used to remove these abnormal values. The removed values ​​were then interpolated using linear interpolation. The heart rate was calculated using the interpolated RR intervals, and the heart rate measurement evaluation result was given a "B" rating.

[0040] [Example 2] Next, a medium-sized garment body was produced in the same manner as in Example 1, except that the highly stretchable knitted fabric was arranged in the upper center of the front body as well as on both sides of the body fabric, with the width (stretch) direction aligned vertically across the body. One sheet-like electrode was then attached to each of the three knitted fabric portions (highly stretchable knitted fabric) in the obtained medium-sized garment body, in the same manner as in Example 1. Next, each sheet-like electrode was connected to a snap button on the upper back on the inside (toward the human body) by a conductor portion, and connected to an electrocardiogram monitor via the snap button, in the same manner as in Example 1. In this manner, garment (2) of Example 2 was obtained.

[0041] Two electrocardiogram signals were obtained from a combination of three electrodes in clothing (2). Specifically, the path through which electrocardiogram signals were obtained from the sheet electrode placed on the left side of the body and the sheet electrode placed in the upper center of the front body was designated channel 1, and the path through which electrocardiogram signals were obtained from the sheet electrode placed on the left side of the body and the sheet electrode placed on the right side of the body was designated channel 2. The purpose of this example is to obtain signals from two paths in order to calculate the heart rate with high noise resistance.

[0042] The method for obtaining signals from two routes and calculating the heart rate is as follows. Specifically, first, measurements are taken at rest for several minutes on each of channel 1 and channel 2 to obtain electrocardiographic signals without noise due to movement. For each of the obtained electrocardiographic signals, filtering and R-wave detection are performed in the same manner as in Example 1, and electrocardiographic signals are extracted 200 milliseconds before and after the moment when the R-wave peak appears. The extracted signals are averaged to obtain reference values ​​of the electrocardiographic waveforms at rest (resting reference waveforms) that do not contain noise for each of channel 1 and channel 2.

[0043] Next, electrocardiogram signals during exercise are acquired on both channel 1 and channel 2. As in the case of obtaining the resting reference waveform described above, electrocardiogram signals are extracted for 200 milliseconds before and after the R wave for each beat, and the correlation coefficient with the resting reference waveform is calculated for each beat. The accuracy of beat-to-beat ECG data measured during exercise is evaluated by evaluating how closely the ECG extracted during exercise resembles the reference waveform at rest. This is based on the fact that although the R-wave interval narrows as exercise intensity increases, the ECG waveform itself does not change significantly.

[0044] The above correlation coefficient is calculated for each channel, so the accuracy of the two channels at each time is evaluated by the correlation coefficient. The weighting coefficient proportional to the obtained correlation coefficient is calculated using the weighting formula proportional to the matching score (correlation coefficient) shown in the following formulas (1) and (2), or the weighting formula proportional to the square of the matching score (correlation coefficient) shown in the following formulas (3) and (4). Here, in the following formulas (1) to (4), r ch1 is the correlation coefficient calculated for channel 1, r ch2 is the correlation coefficient calculated for channel 2, w1 is the weighting coefficient for channel 1, and w2 is the weighting coefficient for channel 2.

[0045]

number

[0046] Meanwhile, the heart rate is calculated from the electrocardiogram for each channel of clothing (2). The heart rate is calculated in the same manner as in Example 1. The heart rate obtained from each channel is multiplied by the weighting coefficient calculated by the above method, and the weighted average heart rate is calculated using the following equation (5). In the following equation (5), w1 and w2 are the weighting coefficients for the above-mentioned channel 1 and channel 2, respectively, and HR ch1 is the heart rate calculated on channel 1, HR ch2 is the heart rate calculated on channel 2, HR total represents the weighted average heart rate.

[0047]

number

[0048] The heart rate measurement result, evaluated based on the heart rate calculated through this series of processes, was "A."

[0049] [Comparative Example 1] In Example 1, the highly stretchable knitted fabric was not used, and the garment was constructed using only the body fabric, and sheet-like electrodes were fixed in the same positions as in Example 1 to obtain garment (3) of Comparative Example 1, and the heart rate measurement performance was evaluated in the same manner as in Example 1. The result was "D." [Industrial Applicability]

[0050] According to the present invention, clothing capable of detecting biological signals is provided, which allows desired biological electrical signals, particularly electrocardiographic signals, to be obtained stably and clearly without applying excessive pressure even during strenuous activity, and this clothing has extremely great industrial value. [Explanation of symbols]

[0051] 10. Clothing 10A Front 10B Back 10H hemline 10L Side seam 10M Chuo Line 10S Armhole 10U lowest point 12 Body fabric 14 Knitted fabric section 16 Sheet electrode 18 Conductor section 20 snap button

Claims

1. A garment capable of detecting a biological signal, the garment comprising: a body fabric; a knitted fabric portion having a more stretchable structure than the body fabric; a sheet-like electrode fixed to the knitted fabric portion; and a conductor portion; The knitted fabric portion having a highly stretchable structure has a bellows-like structure, The knitted fabric portion having the highly stretchable structure is arranged on both side portions of the garment so that the stretch direction of the knitted fabric portion having the highly stretchable structure is the vertical direction, The vertical direction is a straight line direction connecting the lowest point of the armhole to the hemline, and wherein the sheet-like electrode is fixed to the knitted fabric portion only at the outer periphery of the sheet-like electrode.

2. The clothing according to claim 1 , wherein the sheet-like electrode comprises conductive fibers and non-conductive fibers having a single fiber diameter of 10 nm or more and 800 nm or less.

3. 3. The garment of claim 2, wherein the non-conductive fibers are polyester fibers.

4. The garment of claim 1 , wherein the conductive portion includes a conductive portion and an insulating portion.

5. The garment of claim 4 , wherein the insulation portion comprises polyester fibers.

6. The garment according to claim 1 , wherein the connection portion between the sheet-like electrode and the conductive wire portion is covered with an insulating sheet.

7. The garment according to claim 1 , wherein a cushioning material is interposed between the sheet-like electrode and the knitted fabric portion.

8. The garment has a front body and a back body and includes two or more of the sheet-like electrodes, The garment according to any one of claims 1 to 7, wherein the two sheet-like electrodes are located above the center of a line connecting the lowest point of the armhole of the front body to the hemline, and are located on the side of the center line that divides the front body equally into left and right halves and the midpoint of the side lines on both the left and right ends.

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