JP3177243U - Biological signal detector - Google Patents

Abstract

An object of the present invention is to provide water absorption and moisturizing effects to prevent moisture from being lost quickly, to easily wet an electrode piece, to improve a conductive effect for detecting a biological signal, and to improve a biological signal of a human body in a dry area. A biological signal detector that is applied to detection and improves convenience in use is provided.
A biological signal detector includes an assembly structure of at least one electrode piece, a base layer, and at least one water absorbing means. The electrode piece 11 is provided on the upper surface of the base layer 20, the first receiving chamber S1 is formed between the electrode piece 11 and the base layer 20, the water absorbing means 30 is positioned in the first receiving chamber S1, and the water absorbing means The upper end portion of 30 is in contact with the electrode piece 11, and the bottom portion of the water absorbing means 30 is in contact with the base layer 20.
[Selection] Figure 2

Description

  The present invention relates to a biological signal detector, and in particular, has an effect of water absorption and moisturization, so that the electrode piece is wetted, the conductive effect for detecting a biological signal is improved, and detection of a biological signal of a human body in a dry area. The present invention relates to a biological signal detector that is in contact with the surface of a human body.

  Currently, when measuring biological signals such as heartbeats and brain waves of a person, a plurality of electrode pieces of physiological measurement devices are respectively attached (or attached) to different parts of the body surface (also called body surface). When the nerve impulse (that is, change in membrane potential) passes through a body organ (for example, heart or head) by a piece, the current diffused to the surrounding tissue or body surface is detected, and the current is further measured by a physiological measuring instrument. The state of the measurement site (for example, heartbeat frequency or brain wave change) can be understood by being transmitted via the electric wire and converted into data and displayed.

  The conventional electrode piece is mainly composed of a base layer (for example, a conductive colloid layer) and a conductive portion coupled to the base layer, and is used for adhesiveness or conductivity of the base layer when detecting a biological signal. When the aqueous gel is further applied, the body surface (for example, skin) is wetted, and the current on the body surface flows to the physiological measurement instrument through the base layer, the conductive portion, and the electric wire. On the other hand, when current is transmitted from a physiological measurement device to the body surface to deeply enter the body surface and stimulate a site to be treated, so-called electrode treatment is performed.

  However, the aqueous gel combined with the base layer of the conventional electrode piece has a problem that it is difficult to permeate air and is sensitive, and both are uncomfortable in use. In addition, substances such as skin debris (generated in the case of dry skin) and oils and fats (generated in the case of oily skin) are discharged to the human body surface, easily adhering to the base layer, and current conduction obstruction, and the human body Since body temperature is high, moisture on the body surface is easily lost (evaporated), or the combined gel dries out and does not form in a wet state, loses adhesion to the base layer and peels off. Conductivity is affected, making it difficult to detect a biological signal, and in a dry environment, it is more difficult to retain moisture, and further a situation where detection stops is likely to occur, and the grace base layer is likely to crack.

  Further, when a plurality of conventional electrode pieces are used, if the positions between the respective conventional electrode pieces are adjacent to each other, the electrode pieces are likely to come into contact with each other, which may result in a short circuit.

  In view of the above, the creator of the present invention has devoted research, design and assembly, and has the effect of water absorption and moisturization, so that the electrode piece is moistened and the conductive effect of detecting a biological signal is improved, and The present invention intends to create a biological signal detector that can be applied to the detection of biological signals of the human body in dry areas, improving the convenience of use, and touching the surface of the human body. Motivation to do.

  The present invention has an effect of water absorption and moisturization, so that moisture is prevented from being lost quickly and the electrode pieces are easily wetted, the conductive effect for detecting a biological signal is improved, and the biological signal of the human body in a dry area. The main object of the present invention is to provide a biological signal detector that is applied to detection of the above and improves convenience in use.

  The present invention provides a biological signal detector with a strap that has a positioning effect, improves the comfort and aesthetic effects, lowers the influence on current conduction, and reduces noise interference. The purpose.

  Another object of the present invention is to provide a biological signal detector having protrusions that are conspicuous after water absorption so as to be in close contact with the surface of the body.

  In order to achieve the above object, a biological signal detector according to the present invention is provided with a base layer and at least one electrode provided on the upper surface of the base layer and having a first receiving chamber formed between the base layer and the base layer. Including at least one water-absorbing means positioned in the first receiving chamber and having an upper end in contact with the electrode piece and a bottom in contact with the base layer. In addition, it prevents moisture from being lost quickly and easily wets the electrode pieces.In addition, each electrode piece is raised by absorbing water by means of water absorption, and the electrode pieces are brought into close contact with the surface of the body so that the biological signal of the subject is measured. Easy to detect, improves convenience in use, and the addition of straps has a positioning effect, improves comfort and aesthetics, and lowers the impact on current conduction And noise interference To please.

It is a perspective view which shows the biological signal detector which concerns on this invention. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which shows the BB line cross section of FIG. It is a figure which shows the biosignal detector of FIG. 2 comprised by the extending | stretching conducting wire to each electrode piece, and comprised by the upper waterproof layer and lower fabric layer which a base layer mutually overlaps. It is a figure which shows the biological signal detector of FIG. 1 further including a band, the connection piece being extended between each electrode piece, and the extended conducting wire being extended to each electrode piece. FIG. 3 is a diagram illustrating the biological signal detector of FIG. 2 further including a strap. It is a figure which shows the simple Example of the biological signal detector which concerns on this invention. FIG. 8 is an exploded perspective view showing the biological signal detector of FIG. 7 further including a strap. It is a perspective view which shows the mode after the assembly of the biological signal detector of FIG. It is a figure which shows the water absorption means in FIG. 7 comprised by the water storage filler electrode piece and the receiving bag. FIG. 9 is a view showing an embodiment in which the receiving bag in FIG. 8 has an upper water-permeable layer and a lower waterproof layer that overlap each other, and the water-absorbing means expands to form a protrusion after water absorption. It is a figure which shows a mode that the biosignal detector which concerns on this invention is couple | bonded in the front-opening type outerwear.

  For a deeper understanding of the features, features, and technical contents of the present invention, reference is made to the following detailed description of the present invention and the accompanying drawings. The accompanying drawings are provided for reference and explanation only and do not limit the present invention.

  As shown in FIGS. 1 to 11, the present invention is a biological signal detector, and the biological signal detector 1 includes at least one electrode piece 11, a base layer 20, and at least one water absorbing means 30. The electrode piece 11 is brought into contact with the surface of the body to be detected, the water absorbing means 30 is arranged corresponding to the electrode piece 11, and the base layer 20 is attached to the wearing object (the clothes of FIG. 12). 50).

  As shown in FIG. 7, the simple structure of the biological signal detector 1 of the present invention is configured using a single electrode piece 11, and the electrode piece 11 is provided on the upper surface of the base layer 20. A first receiving chamber S1 is formed between the base layer 20 and the water absorbing means 30 is positioned in the first receiving chamber S1, the upper end of the water absorbing means 30 is in contact with the electrode piece 11, and the bottom is the base layer 20. The present invention has the effect of absorbing water, and the electrode piece 11 is easily wetted by the water absorbing means 30.

  When actually used, the biological signal detector 1 of the present invention is a different embodiment depending on the number of electrode pieces 11 used, and when the single electrode piece 11 is used, the biological signal detector of the present invention. 1 is attached to a wrist (not shown) such as an armband or wristband, and an electronic device (not shown, eg, a multimedia player). Is arranged, an attachment member (not shown, for example, an earphone) is electrically connected to the other end of the electronic device, the attachment member is provided at another part of the body (for example, the ear), and ground (Ground) (Or conductive negative electrode) is used to form a detection circuit, and when a plurality of electrode pieces 11 are used, the biological signal detector 1 of the present invention is not necessarily provided on the wrist described above. 12, coupled to garment 50, Sensing circuit via two electrode pieces 11 in 50 may be formed.

  The electrode piece 11 is braided with a plurality of non-conductive fiber yarns and a plurality of conductive fiber yarns, and a plurality of inter-woven fabrics of a plurality of non-conductive fiber yarns and a plurality of conductive fiber yarns are interwoven. The mesh 111 is formed, and the conductive area 112 is braided with a plurality of conductive fiber threads of the electrode piece 11 to improve the contact area. The penetration of the conductive medium (for example, water or physiological saline) is facilitated so that the electric current can be easily conducted, and the intrusion into the electrode piece 11 by impurities such as dust is also blocked, and the subsequent cleaning (removing impurities) and Maintenance can be performed easily, interference into the conductive region 112 is reduced, noise generation is reduced, and the water absorbing means 30 can more easily absorb the permeated water, thereby achieving a moisturizing effect. . In the embodiment, the entire electrode piece 11 may be braided with a plurality of conductive fiber yarns. Thus, the entire electrode piece 11 has a conductive effect and becomes easier to detect.

  In addition, since the water absorbing means 30 uniformly contacts and wets the electrode pieces 11, as shown in FIGS. 2 and 3, a slip stopper 31 (for example, a convex rib or a concave groove) is spaced at the bottom of the water absorbing means 30. A plurality of slip stoppers 21 (for example, concave grooves or convex ribs) corresponding to the upper surface of the base layer 20 are provided at intervals, and each of the corresponding slip stoppers 21 is mutually connected to each of the slip stoppers 31. Correspondingly, the corresponding anti-slip 21 is engaged with the anti-slip 31 so that the water absorbing means 30 can stably stand in each first receiving chamber S1, and the water absorbing means 30 is If it slides, it can prevent that an uneven protrusion is formed on the appearance surface of the electrode piece 11. On the other hand, when actually used, the corresponding anti-slip 21 can be a convex rib, and the anti-slip 31 can be a concave groove engaged with the convex rib.

  The water absorbing means 30 is made from cotton paper, cotton fabric, silicone, water absorbent foamed plastic, fluff pulp (eg paper pulp), sodium polyacrylate, or other equivalently effective acrylic polymer. By being made of superabsorbent polymers, or other equivalently effective superabsorbent polymers, the types that can be used when manufacturing are increased, easy to switch, and limited to a single material. Can be avoided.

  The water-absorbing means 30 is an elastic body, and its shape is spherical (or block-shaped) according to the actual manufacture, and is easy to manufacture. In addition, the water-absorbing means 30 of the present invention is elastic and can be expanded and contracted. It is easy to bend and bend, and then easily return to the original state. When being attached to the surface of the body in this way, it is smoothly attached along the curve of the surface of the body, making it convenient to use and easy to replace.

  The base layer 20 is a fabric layer or a waterproof material layer, and when the base layer 20 is a fabric layer, the entire device of the present invention has an air permeability effect, while the water absorbing means 30 is restricted in the first receiving chamber S1. When moisture (or moisture) is passed through the electrode piece 11 (or base layer 20), the moisture (or moisture) is easily discharged from the biological signal detector 1 by being absorbed again by the water absorbing means 30. In addition, the electrode pieces 11 can be continuously wetted to maintain long-time current conduction. When the base layer 20 is a waterproof material layer, it is made of a plastic sheet material or a polyester fiber material, achieves a waterproof effect, and conductive moisture (or moisture) is washed away through the base layer 20. And has the same moisturizing effect. However, the base layer 20 of the present invention is not limited to the above, and as shown in FIG. 4, the base layer 20 includes an upper waterproof layer 22 and a lower fabric layer 23 that overlap each other, and an upper waterproof layer 22 (for example, (Made of polyester fiber) is brought into contact with each water absorbing means 30 to have a waterproof effect, and the upper waterproof layer 22 is protected by the lower fabric layer 23, and a plurality of corresponding upper surfaces of the upper waterproof layer 22 are provided. An anti-slip 21 may be provided and the lower fabric layer 23 may be configured to be coupled to the garment.

  Moreover, in this specification, the at least one electrode piece 11 has a plurality of electrode pieces 11, the at least one water absorption means 30 has a plurality of water absorption means 30, and a plurality of terms are two or more. 2 and 4, when the two electrode pieces 11 are used in combination with both the water absorbing means 30, the present invention provides an interval between the electrode pieces 11 on the upper surface of the base layer 20. (As shown in FIG. 1), a first receiving chamber S1 is formed between each electrode piece 11 and the base layer 20, and both water absorbing means 30 are provided in each first receiving chamber S1. Each of the water absorbing means 30 is in contact with each electrode piece 11, and the bottom of each water absorbing means 30 is in contact with the base layer 20. Thus, the water absorbing means 30 wets each electrode piece 11. It becomes easy.

  Further, as shown in FIGS. 4 and 5, at least one connection piece 12 is connected between any two adjacent electrode pieces 11, and at least one second piece is provided between the connection piece 12 and the base layer 20. The receiving chamber S <b> 2 is formed, and these electrode pieces 11 and the connection pieces 12 are connected to each other to form the upper layer 10 corresponding to the shape of the base layer 20, so that these electrode pieces 11 are connected via the connection pieces 12. Each electrode piece can be quickly applied to the corresponding side of the same part of the body (for example, both the left and right sides of the head, the left and right sides of the back, or the chest and back of the heart) It can be avoided that the eleven contacts with each other and become a short circuit.

  The second receiving chamber S2 is for housing other parts (for example, electric wires, sensors, controllers). When no object is placed in the second receiving chamber S2, the connection piece 12 is used. Is attached to the upper surface of the base layer 20.

  In order to reduce the cost and electrically connect the electrode piece 11 to the current on the body surface when the size of the electrode piece 11 is large, as shown in FIGS. A single extension conductor 13 (shown in the partially enlarged view below in FIG. 4) is further coupled, and one end of each extension conductor 13 extends into each electrode piece 11 and is electrically connected (ie, The other end of each extended conductor 13 is extended from one side edge of each electrode piece 11 so that the extended conductor 13 of each electrode piece 11 is electrically connected to the current on the body surface. After each water absorbing means 30 absorbs water and expands so that it can be easily connected to each electrode, each electrode piece 11 becomes a projection, and when actually used, the present invention uses a single electrode piece 11, Also in this case, the extension lead wire 13 may be added. , In the case of using two or more electrode pieces 11, extension wire 13 is selectively coupled depending on the size of each electrode strip 11.

  The extension conductor 13 of the electrode piece 11 is made of a plurality of conductive yarns for textiles and is somewhat soft. Therefore, an electric wire (not shown) is electrically connected to the extension conductor 13 and the other end of the electric wire is connected to a physiological measuring instrument ( (Not shown), the current on the body surface can be transmitted to the physiological measuring instrument after passing through the electrode piece 11, the extended lead wire 13 and the electric wire. Since the extension conducting wire 13 is not necessarily a member to be installed, the electrode piece 11 may be directly electrically connected to an electric wire (not shown).

  Further, as shown in FIG. 5 (according to FIG. 6), as an optimal example of the embodiment of the present invention, a strap 40 is further included, and the lower edge 41 of the strap 40 is formed on the peripheral edge of the bottom surface of the base layer 20. The upper edge 42 of the strap 40 is connected to the peripheral edge of the upper surface of the upper layer 10 (that is, composed of the electrode pieces 11 and the connecting piece 12 connected to each other), and the peripheral edge of the upper surface of the upper layer 10 is Corresponding to the peripheral edge of the bottom surface of the base layer 20, it is easy to cover and fix with the strap 40, thereby improving the comfort and aesthetic effects. In the present embodiment, the connection pieces 12 are selectively provided according to actual requirements. Therefore, in the present invention, the two electrode pieces 11 are spaced only on the upper surface of the base layer 20 as shown in FIG. Since the upper edge 42 of the strap 40 is connected only to the peripheral edges of the upper surfaces of the two electrode pieces 11, the present invention can be sewn to the garment 50 (sewn with the stitch 60 and fixed). ) When combined (see FIG. 12), the area to be sewn by the strap 40 is confirmed, and the stitch 60 is sewn along the strap 40 to sew the water absorbing means 30 by mistake and sew the structure. The destruction is avoided. Further, according to the present invention, the conductive region 112 of the two electrode pieces 11 can be quickly and closely attached to the portion to be measured after being worn by the person to be measured by matching with the clothes 50, and thus the individual attachments are made. Is avoided.

  Further, as shown in FIG. 8, the embodiment of the strap 40 may be used by being assembled with the simple structure of the biological signal detector 1 described above (see FIG. 7 for the simple structure, 9), the lower edge 41 of the strap 40 is connected to the periphery of the bottom surface of the base layer 20, and the upper edge 42 of the strap 40 is connected to the periphery of the upper surface of the electrode piece 11. By being connected and the peripheral edge of the upper surface of the electrode piece 11 corresponding to the peripheral edge of the bottom surface of the base layer 20, it is easy to cover and fix with the strap 40, and to improve and combine the comfort and aesthetic effects as well. It becomes easy to connect to the clothes 50.

  Further, as shown in FIG. 10, the water absorbing means 30 further includes at least one water storage filler 33 and a receiving bag 34 covering the water storage filler 33, thereby preventing moisture from being lost quickly, When a plurality of water storage fillers 33 are used, in order to avoid scattering of the plurality of water storage fillers 33, these water storage fillers 33 are covered and restrained by a receiving bag 34 so that the water absorption means 30 can be adjusted and the electrode piece 11 is supported. Thus, when the present invention is affixed to a human body surface, the water absorbing means 30 is brought into close contact with the corresponding electrode pieces 11 and has a curved surface. And the generation of a gap is avoided, and the current on the surface of the body is transmitted to the electrode piece 11 so that the change of the biological signal can be easily detected.

  A plurality of slip stoppers 31 are provided at intervals on the bottom of the receiving bag 34, and a plurality of slip stoppers 21 corresponding to the upper surface of the base layer 20 are provided at intervals, and each of the corresponding slip stoppers 21 is provided with each slip stopper 31. When the water absorbing means 30 slips, uneven projections are formed on the outer surface of the electrode piece 11 by engaging the corresponding slip stoppers 21 with the slip stoppers 31. Can be prevented.

  As shown in FIG. 11, the receiving bag 34 has an upper water-permeable layer 341 and a lower waterproof layer 342 that overlap each other, as shown in FIG. The lower waterproof layer 342 is in contact with the base layer 20, the upper water permeable layer 341 is in contact with each electrode piece 11, the plurality of anti-slip 31 is provided on the lower surface of the lower waterproof layer 342, and the upper water permeable layer 341 By being composed of a base layer, a paper material layer, or a translucent resin, water is discharged only through the upper water-permeable layer 341 and the electrode piece 11, and water can be easily stored in the receiving bag 34.

  The water storage filler 33 is made of cotton paper, cotton fabric, silicone, water-absorbing foam plastic, fluff pulp, sodium polyacrylate, or other equivalently effective acrylic polymer, superabsorbent polymer, and the shape of the member is plural. Has a change (eg, spherical).

  As described above, the upper end portion of the water absorbing means 30 is directly provided so as to have a protruding shape (as shown in FIG. 8), and after absorbing the water, the water absorbing means 30 is expanded into a more protruding shape, and the electrode piece 11 is As shown in FIG. 11, when the water absorbing means 30 is configured by combining a plurality of water storage fillers 33 and receiving bags 34, these water storage fillers 33 expand after water absorption. That is, a plurality of protrusions 32 are formed on the entire surface of the receiving bag 34, and these protrusions 32 can also support the corresponding electrode pieces 11, and thus are more closely adhered along the curve of the body surface. The

  Therefore, the biological signal detector according to the present invention has an effect of water absorption and moisture retention due to the combined design of at least one electrode piece 11, the base layer 20, and at least one water absorption means 30, and moisture is lost quickly. The electrode piece 11 is easily wetted, and the water absorbing means 30 absorbs water and expands to form a protrusion or a protrusion, so that the electrode piece is in contact with the surface of the body and has an effect of being in close contact. The biometric signal of the person being measured is easy to detect, improves the convenience in use, and further, the strap 40 is added to provide a positioning effect, improve the comfort and aesthetic effects, In addition, the effect on current conduction is reduced and noise interference is reduced.

  As described above, the present invention is merely a preferred specific embodiment of the present invention, and does not limit the scope of the utility model registration request of the present invention. It will be appreciated that changes and modifications can be appropriately made within the field of the invention, but such implementation should fall within the scope of the claimed invention.

1: Biosignal detector 10: Upper layer 11: Electrode piece 12: Connection piece 13: Extension conductor 20: Base layer 21: Non-slip 22: Upper waterproof layer 23: Lower fabric layer 30: Water absorption means 31: Non-slip 32: Protrusion Part 33: water storage filler 34: receiving bag 40: strap 41: lower edge 42: upper edge 50: clothing 60: stitch 111: rope 112: conductive region 341: upper water-permeable layer 342: lower waterproof layer S1: first Receiving chamber S2: second receiving chamber

Claims (20)

The base layer,
At least one electrode piece provided on an upper surface of the base layer and having a first receiving chamber formed between the base layer and the base layer;
A biological signal detector comprising: at least one water-absorbing means positioned in the first receiving chamber, having an upper end in contact with the electrode piece and a bottom in contact with the base layer.   The electrode piece is configured by braiding a plurality of non-conductive fiber yarns and a plurality of conductive fiber yarns, and the conductive region is braided by the plurality of conductive fiber yarns of the electrode piece. The biological signal detector according to claim 1.   The biological signal detector according to claim 1, wherein the entire electrode piece is configured by braiding with a plurality of conductive fiber threads.   A plurality of slip stoppers are provided at intervals on the bottom of the water absorbing means, and a plurality of slip stoppers corresponding to the upper surface of the base layer are provided at intervals, and each of the corresponding slip stoppers is connected to each of the slip stoppers. The biological signal detector according to claim 1, wherein the corresponding anti-slip is correspondingly engaged with the anti-slip.   The biological signal detector according to claim 1, wherein the water absorption means is one of cotton paper, cotton fabric, silicon, and water-absorbing foam plastic.   The biological signal detector according to claim 1, wherein the water absorbing means is a member made of sodium polyacrylate.   The biological signal detector according to claim 1, wherein the water absorption means is an elastic body.   The biological signal detector according to claim 1, wherein the base layer is a fabric layer.   The biological signal detector according to claim 1, wherein the base layer is a waterproof material layer.   The biological signal detector according to claim 1, wherein the base layer includes an upper waterproof layer and a lower fabric layer that overlap each other, and the upper waterproof layer is in contact with each of the water absorbing means.   The at least one electrode piece includes a plurality of electrode pieces, each electrode piece is provided on the upper surface of the base layer at an interval, and a first receiving member is provided between each electrode piece and the base layer. Chambers are formed, the at least one water absorbing means has a plurality of water absorbing means, the water absorbing means are positioned in the first receiving chambers, and the upper ends of the water absorbing means are the electrodes. Each of the water absorbing means is in contact with the base layer, and a connecting piece is connected between any two adjacent electrode pieces, and a second connecting piece is provided between the connecting piece and the base layer. The biological signal detector according to claim 1, wherein two receiving chambers are formed, and the electrode piece and the connection piece are connected to each other to form an upper layer corresponding to the shape of the base layer.   The strap further includes a strap, the lower edge of the strap is connected to the periphery of the bottom surface of the base layer, the upper edge of the strap is connected to the periphery of the upper surface of the upper layer, and the periphery of the upper surface of the upper layer is the base The biological signal detector according to claim 11, wherein the biological signal detector corresponds to a peripheral edge of a bottom surface of the layer.   At least one extension lead is further coupled to each electrode piece, one end of each extension lead extends into each electrode piece and is electrically connected, and the other end of each extension lead is each The biological signal detector according to claim 11, wherein the biological signal detector extends from one side edge of the electrode piece.   Further, a strap is included, the lower edge of the strap is connected to the periphery of the bottom surface of the base layer, the upper edge of the strap is connected to the periphery of the upper surface of the electrode piece, and the periphery of the upper surface of the electrode piece is The biological signal detector according to claim 1, wherein the biological signal detector corresponds to a peripheral edge of a bottom surface of the base layer.   The water absorbing means further includes at least one water storage filler and a receiving bag that covers the water storage filler, and a plurality of slip stoppers are provided at intervals at the bottom of the receiving bag, corresponding to the upper surface of the base layer A plurality of non-slip stoppers are provided at intervals, each of the corresponding anti-slip elements and each of the anti-slip elements correspond to each other, and the corresponding anti-slip elements are engaged with the anti-slip elements. The biological signal detector according to claim 1.   The biological signal detector according to claim 15, wherein the water storage filler is one of cotton paper, cotton fabric, silicone, and water-absorbing foam plastic.   The biological signal detector according to claim 15, wherein the water storage filler is a member made of sodium polyacrylate.   The receiving bag includes an upper water-permeable layer and a lower waterproof layer that overlap each other, the lower waterproof layer is in contact with the base layer, the upper water-permeable layer is in contact with the electrode piece, and the plurality of anti-slip is the lower water-proof layer The biological signal detector according to claim 15, wherein the biological signal detector is provided on a lower surface of the layer.   The biosignal detector according to claim 18, wherein the water storage permeable layer is one of a fabric layer, a paper material layer, and a translucent resin.   The biological signal detector according to claim 1, wherein the water absorbing means has a protruding shape.

Images