JP2015093167A - Biological sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological sensor that is thin and less likely to peel off from an organism such as a human body, and can be easily manufactured.SOLUTION: A biological sensor that is stuck to an organism to detect biological data, comprises: a double-sided adhesive body whose one surface is stuck to the organism; a detection part arranged on the another surface of the double-sided adhesive body for detecting the biological data; an electrode part arranged on the one surface side of the double-sided adhesive body electrically connecting with the detection part; and a coating body arranged on the another surface of the double-sided adhesive body for coating the detection part and the double-sided adhesive body.

Description

  The present invention relates to a biosensor, and more particularly to a biosensor that can be attached to a living body.

  2. Description of the Related Art In recent years, for example, in medical sites, biosensors that detect biometric data such as body temperature, electrocardiogram signals, blood pressure, respiratory rate, and sweating amount have been used in order to accurately grasp the health status of patients and the like.

  Various types of such biosensors have been developed. For example, a sensor disclosed in Patent Document 1 is known. This biosensor is used by being affixed to the skin of a human body. As shown in FIG. 9, the base 101, the electrode 102 disposed on one side of the base 101, and the other side of the base 101 The data acquisition module 103 arranged on the side, and the wiring 104 connecting the electrode 102 and the data acquisition module 103 are provided. In use, one surface side of the substrate 101 on which the electrode 102 is disposed is attached to the skin.

  Here, the substrate 101 is composed of polydimethylsiloxane (PDMS; so-called silicon rubber) formed by polymerizing dimethylvinyl-terminated dimethylsiloxane (DSDT) and tetramethyltetravinylcyclotetrasiloxane (TTC). Various mixed liquids having different mixing ratios of DSDT and TTC in order to exhibit the flexibility of the base 101 and the retention of the data acquisition module 103 while exhibiting the function of attaching to the human body The PDMS is poured into a predetermined mold at different timings, and PDMS having different mixing ratios of DSDT and TTC are laminated in layers while polymerizing each mixture. In order to impart adhesiveness to one surface side of the substrate 101, the PDMS layer disposed on the one surface side of the substrate 101 is formed of a mixed solution of DSDT: TTC = 100: 2.

JP 2012-139306 A

  In the biosensor described above, the substrate to be attached to the human body is composed of PDMS, and the usability is relatively excellent. However, as described above, the substrate has a mixing ratio of DSDT and TTC. Various mixed liquids are sequentially poured into a predetermined mold and PDMS layers having different mixing ratios of DSDT and TTC are stacked in layers, so that the thickness of the substrate becomes relatively large. Therefore, there is a problem that it is easily pulled off by being caught on clothes or a part of the human body during use (at the time of application to the human body). In addition, since various liquid mixtures having different mixing ratios of DSDT and TTC are formed by pouring them into the mold at different timings, there are problems in that the workability in production is poor and the production cost is high.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a biosensor that is thin and hardly peeled off from a living body such as a human body and can be easily manufactured.

  The above-mentioned object of the present invention is a biological sensor that is attached to a living body and detects biological data, and is disposed on the other surface of the double-sided adhesive body, one surface of which is attached to the biological body, A detection unit for detecting data; an electrode unit disposed on one side of the double-sided adhesive body; and electrically connected to the detection unit; and disposed on the other side of the double-sided adhesive body, the detection unit and the A biosensor comprising a covering covering a double-sided adhesive body. More achieved.

  In this biosensor, it is preferable that the peripheral portion is formed thinner than the central portion. Moreover, it is preferable that the exposed surface shape of the said covering in the said peripheral part is an inclined surface which inclines as it goes to the said center part. The inclined surface may be a curved surface, or the inclined surface may be formed by a plurality of flat surfaces.

  In addition, the biosensor may be configured such that at least a part of the periphery is formed in an arc shape in a plan view. Moreover, it is preferable that the static friction coefficient by the static friction coefficient test method of the said covering is 1.0 or less. Moreover, you may comprise the said covering body so that it may be provided with a stretching property. Moreover, you may provide the communication part which connects the exposed surface side of the said covering and the one surface side of the said double-sided adhesive body. The communication portion may be formed as a coaxial through hole that penetrates the covering body and the double-sided adhesive body. Moreover, you may comprise a biosensor so that the elastic wiring which electrically connects the said detection part and the said electrode part may be provided.

  Moreover, it is preferable that the said covering body has moisture permeability. The covering includes a core portion formed of a moisture-permeable material and a functional coating layer that coats the surface of the core portion, and the functional coating layer includes a water repellent layer, a waterproof layer, and an antibacterial layer. You may comprise so that it may be at least 1 sort (s) chosen from the group which consists of a property layer and an antifouling layer.

  Moreover, it is preferable that the said double-sided adhesive body has moisture permeability. An example of such a double-sided pressure-sensitive adhesive body is a porous double-sided pressure-sensitive adhesive body. Moreover, you may form the said double-sided adhesive body from the material containing the adhesive composition from which adhesive force falls by external irritation | stimulation.

  According to the present invention, it is possible to provide a biosensor that is thin and hardly peeled off from a living body such as a human body and can be easily manufactured.

It is a schematic structure sectional view of a living body sensor concerning one embodiment of the present invention. It is a top view of the biosensor which concerns on one Embodiment of this invention. (A) is a schematic structure sectional drawing which shows the modification of the biosensor shown in FIG. 1, (b) is the top view. It is a schematic structure sectional view showing other modifications of the living body sensor shown in FIG. FIG. 7 is a schematic cross-sectional view showing still another modification of the biosensor shown in FIG. 1. FIG. 6 is a schematic configuration cross-sectional view showing a modification of the biosensor shown in FIG. 5. FIG. 1 is a schematic cross-sectional view showing another modification of the biosensor. FIG. 1 is a schematic cross-sectional view showing another modification of the biosensor. It is schematic structure sectional drawing which shows the conventional biosensor.

  Hereinafter, a biosensor 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Each figure is partially enlarged or reduced in order to facilitate understanding of the configuration. FIG. 1 is a schematic cross-sectional view of a biosensor 1 according to an embodiment of the present invention, and FIG. 2 is a plan view of the biosensor 1. The biosensor 1 according to the present invention is a device that detects biometric data such as a pulse rate, oxygen saturation in blood, body temperature, sweat volume, blood pressure, electrocardiogram signal, and the like, and is used by being attached to a living body.

  As shown in FIG. 1, the biosensor 1 includes a double-sided adhesive body 2, a detection unit 3, an electrode unit 4, and a covering body 5. As shown in the plan view of FIG. In form, it is formed in a substantially rectangular shape in plan view. Further, the shape of the biosensor 1 is not limited to a substantially rectangular shape in plan view, and may have various shapes such as an elliptical shape in plan view and a circular shape in plan view.

  The double-sided pressure-sensitive adhesive body 2 is a sheet-like member having adhesiveness on both sides. Since one side of the double-sided pressure-sensitive adhesive body 2 is adhered to a living body, the material for forming the double-sided pressure-sensitive adhesive body 2 has low pressure on the skin and sufficient pressure-sensitive adhesiveness. Any pressure-sensitive adhesive that can be easily peeled off from the skin can be used without particular limitation. Examples include natural rubber adhesives, synthetic rubber adhesives, acrylic adhesives, polyurethane adhesives, silicone adhesives, styrene-isoprene-styrene block copolymer adhesives, etc. It is not limited to. Of these, acrylic pressure-sensitive adhesives are preferred because of their good adhesiveness. In addition, the double-sided pressure-sensitive adhesive body 2 may be formed by previously mixing a filler, a pigment or the like for adjusting the viscosity into the above-mentioned pressure-sensitive adhesive. Here, what is necessary is just to adjust suitably the adhesive force (adhesion holding | maintenance force to a biological body) of the double-sided adhesive body 2 according to the utilization time of a biosensor. For example, if a necessary biological signal can be acquired in one day, it is sufficient that the holding power is 3 days, and a holding power of 1 week or more is unnecessary. Moreover, since the double-sided adhesive body 2 is a member stuck on the surface of a living body, it is preferably formed from a material excellent in stretchability and flexibility from the viewpoint of following the shape of the living body surface.

  The detection unit 3 is a device that acquires a biological signal transmitted through the electrode unit 4 as biological data, and is disposed at a substantially central portion on the other surface of the double-sided pressure-sensitive adhesive body 2. The detection unit 3 is integrally supported on the double-sided adhesive body 2 by an adhesive function on the other surface side of the double-sided adhesive body 2. Examples of signals related to the living body include signals related to the pulse rate, blood oxygen saturation, body temperature, sweat volume, blood pressure, electrocardiogram signal, and the like. The detection part 3 is comprised so that the sensor according to the kind of signal regarding the biological body acquired may be provided. For example, a pulse sensor is appropriately used for the purpose of detecting a pulse, a temperature sensor is used for the purpose of detecting body temperature, and a sweat sensor is used for detecting the amount of sweat. I have. In addition, you may comprise the detection part 3 so that it may be provided with a several various sensor so that the signal (for example, pulse rate, body temperature, blood pressure, etc.) regarding several types of biological bodies can be acquired. Further, the detection unit 3 may include a storage unit that stores a signal related to the acquired living body as biological data, and a transmission / reception unit that connects the biological data to an external device so as to be able to transmit and receive.

  The electrode unit 4 is disposed on one side of the double-sided pressure-sensitive adhesive body 2 and is electrically connected to the detection unit 3 disposed on the other side of the double-sided pressure-sensitive adhesive body 2. The electrode unit 4 is electrically connected to the detection unit 3 through the wiring member 6. The electrode unit 4 has a function of contacting the living body surface and guiding a signal related to the living body obtained from the living body to the detecting unit 3. A part of the wiring member 6 is disposed inside the double-sided pressure-sensitive adhesive body 2, and the other part is disposed between the double-sided pressure-sensitive adhesive body 2 and the cover 5.

  The covering body 5 is a sheet-like member that is disposed on the other surface of the double-sided pressure-sensitive adhesive body 2 and covers the detection unit 3 and the double-sided pressure-sensitive adhesive body 2. The covering body 5 is integrally supported on the double-sided pressure-sensitive adhesive body 2 by an adhesive function on the other surface side of the double-sided pressure-sensitive adhesive body 2. Examples of the material for forming the covering 5 include polyurethane resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyamide resin, ethylene / vinyl acetate copolymer resin, polyester resin, polyvinyl alcohol resin, polyacrylate resin, Examples thereof include polymer materials such as a polycarbonate resin, a fluorine-containing copolymer resin, a polystyrene resin, and a polyvinylidene chloride resin. Moreover, since it is preferable to follow the deformation | transformation of the double-sided adhesive body 2, the coating | coated body 5 is preferable to form from the material which is excellent in a stretching property or a softness | flexibility.

The biosensor 1 having such a configuration preferably has an extensibility, for example, a breaking elongation of 120% or more. The biosensor 1 having such extensibility can effectively suppress the biosensor 1 itself from being broken by the movement of the body after being attached to the body. When the breaking elongation is 50% or less, the biosensor 1 itself may be broken by the movement of the body after being attached to the body.
Further, the extensibility is preferably isotropic. For example, it is preferable that the ratio of the breaking elongation in the direction orthogonal to the breaking elongation in any one direction is 1.0 to 1.1. By setting the ratio of elongation at break in such a numerical range, it is possible to effectively prevent the biosensor 1 from being peeled off by stress after being attached to the body. In addition, when the ratio of breaking elongation exceeds 2.0, there is a possibility that it will be easily peeled off by stress even after being attached to the body. In addition, it is ideal that the biosensor 1 has a contraction rate of 100%. For example, the recovery rate when the biosensor 1 is stretched 50% in any one direction is preferably 50% or more. Further, it is more preferably 70% or more. The biosensor 1 having such a contractility can extremely effectively prevent peeling and floating due to the movement of the body after being attached to the skin. In addition, when a recovery rate is less than 30%, there exists a possibility that it may become easy to generate | occur | produce and float by the movement of the body after affixing on skin. Moreover, it is preferable that the contractility is isotropic. For example, it is preferable that the ratio of the recovery rate in the direction orthogonal to the recovery rate in any one direction is 1.0 to 1.1. By setting the ratio of the recovery rate in such a numerical range, it is possible to effectively prevent the biosensor 1 from being peeled off by stress after being attached to the body. If it exceeds 2.0, it may be easily peeled off by stress even after being attached to the body.

The moisture permeability of the biosensor 1 is preferably 1800 g / m ² / day or more. If it is less than 1000 g / m ² / day, there is a risk of rash caused by stuffiness due to sweat, or the adhesive strength of the double-sided pressure-sensitive adhesive body 2 may be reduced and peeled off easily. In addition, the air permeability of the biosensor 1 may be, for example, 80 seconds or less when 100 ml of air passes through an area of 15 mmΦ in Gurley type air permeability measurement (Gurley test machine method) defined in JIS P8117. It is particularly preferable that it is 40 seconds or less. The biosensor 1 having such a breathability can effectively suppress rash caused by sweat caused by sweat or the adhesive strength of the double-sided adhesive body 2 being reduced and being easily peeled off.

  The biosensor 1 according to the present embodiment is formed to have a uniform thickness (the vertical dimension in FIG. 1) as shown in the cross-sectional view of FIG. As shown in the schematic configuration cross-sectional view and the plan view of FIG. 3B, the thickness of the peripheral portion of the biosensor 1 (the vertical dimension in FIG. 3A) is the thickness of the central portion surrounded by the peripheral portion. You may form so that it may become thinner than thickness. In FIG. 3, the exposed surface shape of the covering 5 at the peripheral edge of the biosensor 1 is configured to be an inclined surface 51 that is inclined toward the central portion. Further, the inclined surface 51 at the peripheral edge of the covering 5 may be formed by a plurality of planes as shown in FIG. 3, or may be formed in a curved surface as shown in the schematic configuration sectional view of FIG. Also good. In addition, in the biosensor 1 shown in FIG.3 and FIG.4, the exposed surface shape of the center part of the covering 5 is comprised so that it may become a smooth plane. Further, the thickness of the peripheral portion of the biosensor 1 (the vertical dimension in FIG. 3A) is not particularly limited, but is more preferably set in the range of 20 μm to 100 μm. When setting in such a range, it is possible to improve the followability to the skin while preventing the biological sensor 1 from being physically pulled and peeled off. In addition, it has excellent handling properties, and can effectively avoid wrinkles and creases before being applied to the skin. This can prevent the sensor unit from being damaged.

  As described above, the biosensor 1 according to the present embodiment has a relatively simple configuration in which the detection unit 3 that acquires biometric data is interposed between the double-sided pressure-sensitive adhesive body 2 and the covering body 5. Its manufacture is easy and the manufacturing cost can be kept low. Moreover, since the coating | coated body 5 is comprised so that the other surface side whole of the double-sided adhesive body 2 in which the detection part 3 is arrange | positioned may be covered, the detection part 3 can be protected effectively.

  Moreover, when the thickness of the peripheral part is formed so as to be thinner than the thickness of the central part surrounded by the peripheral part as the structure of the biosensor 1, the biosensor 1 serving as a starting point of peeling of the biosensor 1 Since the peripheral height of the living body sensor 1 can be reduced, clothes, fingers, etc. are worn on the living body sensor 1 or when the living body sensor 1 is unintentionally scratched during sleep or the like, As a result, the biosensor 1 can be prevented from peeling off.

  In particular, as shown in FIGS. 3 and 4, when the exposed surface shape of the covering 5 at the peripheral portion is configured to be an inclined surface 51 that is inclined toward the central portion, the inclined surface 51 is Since the guide function that guides the finger, clothes, etc. in contact with the biosensor 1 in the direction away from the biosensor 1 is exhibited, it is possible to effectively suppress the biosensor 1 from being peeled off by contact with the finger. In addition, as shown in FIG. 4, when the inclined body 51 is formed in a curved surface shape and the covering 5 is configured so as to be smoothly connected to the exposed surface of the center portion, the finger is placed on the surface of the biosensor 1. It is possible to more effectively suppress the biosensor 1 from being peeled off.

  The biosensor 1 according to the present invention has been described above, but the specific configuration is not limited to the above embodiment. In the said embodiment, you may comprise so that the double-sided adhesive body 2 may have moisture permeability. For example, moisture permeability may be imparted by forming the double-sided pressure-sensitive adhesive body 2 in a porous shape having a plurality of fine pores of several microns. Specifically, moisture permeability can be imparted by forming a plurality of through holes penetrating the one surface side and the other surface side of the double-sided pressure-sensitive adhesive body 2.

  The covering 5 may also be configured to have moisture permeability. For example, moisture permeability may be imparted by forming the covering 5 in a porous shape having a plurality of fine holes of about several microns. In order to form the cover 5 in a porous shape, a plurality of through holes penetrating the one surface side (side in contact with the double-sided pressure-sensitive adhesive body 2) and the other surface side (exposed surface side) of the cover body 5 are formed. Can be performed. Alternatively, a porous film may be formed by stretching a resin film (nonporous film) formed using the material forming the covering 5 described above, and the porous film may be used as the covering 5.

  Moreover, as shown in FIG. 5, you may make it provide at least 1 or more communication part 7 which connects the exposed surface side of the coating | covering body 5, and the one surface side of the double-sided adhesive body 2. As shown in FIG. With such a configuration, it is possible to obtain a biosensor 1 that is excellent in air permeability and moisture permeability. As a result, when the biosensor 1 is attached to the living body, it is possible to prevent the biosensor 1 from being peeled off from the living body by preventing separation between the biosensor 1 and the living body surface. it can. Further, the communication portion 7 may be formed as a coaxial through-hole penetrating the covering body 5 and the double-sided pressure-sensitive adhesive body 2 as shown in FIG. 5, for example, as shown in the cross-sectional view of FIG. The axial center of the through-hole penetrating the body 5 and the axial center of the through-hole penetrating the double-sided pressure-sensitive adhesive body 2 may be slightly shifted so that they are not coaxial.

  Moreover, in the said embodiment, you may comprise so that the coating 5 may be provided with the core part which has moisture permeability, and the functional coating layer which coats the surface of the said core part. The functional coating layer is preferably at least one selected from the group consisting of a water-repellent layer, a waterproof layer, an antibacterial layer, and an antifouling layer. When a functional coating layer is formed as a water repellent layer or a waterproof layer, for example, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), polytetrafluoroethylene (PTFE), tetrafluoroethylene-hexafluoropropylene copolymer A fluororesin material such as a polymer (FEP) can be suitably used as a material for forming a water repellent layer or a waterproof layer. Further, when forming a functional coating layer as an antibacterial layer, for example, a thermoplastic resin such as an acrylic resin, vinyl chloride / vinyl acetate copolymer, urethane resin, etc. as a binder, A material obtained by adding a metal ion rich in antibacterial properties such as copper ions supported on an ion exchanger such as zeolite so that the ions can be exchanged can be used as a material for forming the antibacterial layer. Moreover, when forming a functional coating layer as an antifouling layer, as a material which forms an antifouling layer, an acrylic resin material can be used, for example. In addition, a coating solution containing a photocatalytic substance can be used as a material for forming the antifouling layer.

  The covering 5 in the above embodiment is a member that is exposed when the biosensor 1 is attached to a living body, and is a member that rubs against clothes, bedding, or the like depending on the attachment position of the biosensor 1. In order to prevent the biosensor 1 from being peeled off due to rubbing with clothes or the like, and the user's wearing feeling being deteriorated, the covering 5 is subjected to a static friction coefficient test in accordance with a JIS K7125 plastic-film and sheet-friction coefficient test method. It is preferable to form so that the static friction coefficient by a method may be 1.0 or less. By setting the coefficient of static friction of the covering 5 in this manner, the covering 5 has improved slipperiness with clothes and the like, and can prevent the biosensor 1 from being peeled off due to friction with the clothes and the like. Can be improved.

  Moreover, in the said embodiment, you may comprise the wiring member 6 which electrically connects the detection part 3 and the electrode part 4 with a stretchable wiring. The stretchable wiring can be formed from, for example, a material such as a conductive polymer, a metal nanowire such as silver, a carbon nanotube, and graphene. When a stretchable wiring is adopted as the wiring member 6 that electrically connects the detection unit 3 and the electrode unit 4, the wiring member 6 expands and contracts following the expansion and contraction of the double-sided pressure-sensitive adhesive body 2 and the covering body 5. When the biosensor 1 is accompanied by a large deformation such as when the biosensor 1 is attached or removed, it is possible to effectively prevent the wiring member 6 from being disconnected.

  Moreover, in the said embodiment, you may comprise so that the double-sided adhesive body 2 may be equipped with an anesthetic component layer. This anesthetic component layer is disposed so as to be exposed on one surface of the double-sided pressure-sensitive adhesive body 2. Anesthetic components contained in the anesthetic component layer include ester local anesthetics such as procaine, chloroprocaine, tetracaine, ethyl aminobenzoate (benzocaine), and amides such as lidocaine, mepivacaine, dibucaine, bupivacaine, ropivacaine, and levobupivacaine. Type local anesthetics. When the double-sided pressure-sensitive adhesive body 2 is configured to have an anesthetic component layer as described above, the user's itching and pain caused by rash when the biosensor 1 is attached to the living body are alleviated, and the user feels uncomfortable when wearing the biosensor 1. Can be effectively eliminated. Moreover, since the uncomfortable feeling at the time of wearing can be eliminated, it is possible to prevent unintentional scratching of the biosensor 1 during sleep or the like, so that the biosensor 1 can be prevented from peeling off.

  Moreover, in the said embodiment, although the electrode part 4 has a form which the surface exposes in the one surface side of the double-sided adhesive body 2, as shown in FIG. 1, it is limited especially to such a structure. Not. For example, as shown in FIG. 7, the electrode part 4 is configured to be embedded in the double-sided pressure-sensitive adhesive body 2, and a part 21 of the double-sided pressure-sensitive adhesive body 2 between the one surface of the double-sided pressure-sensitive adhesive body 2 and the electrode part 4. May be formed of a conductive adhesive. Even in such a configuration, a signal related to a living body obtained from the living body is transmitted through the conductive adhesive (a part 21 of the double-sided adhesive body 2) in contact with the living body, the electrode unit 4, the wiring member 6, and the detecting unit 3 Can be transmitted in this order. In addition, a conductive adhesive can be formed by adding conductive materials, such as a metal microparticle and a conductive polymer, to the adhesive illustrated as a material which forms the double-sided adhesive body 2 mentioned above, for example. .

  Moreover, in the said embodiment, you may comprise so that the adhesive force of the double-sided adhesive body 2 may become non-uniform | heterogenous between arbitrary areas | regions. For example, you may comprise so that the adhesive force in the peripheral part of the double-sided adhesive body 2 may become higher than the adhesive force of the center part surrounded by a peripheral part. When such a configuration is adopted, since the adhesive force to the living body at the periphery of the living body sensor that becomes the starting point of peeling of the living body sensor 1 becomes strong, the living body sensor 1 that does not easily peel off can be obtained.

  Moreover, in the said embodiment, as shown in the top view of FIG. 2, although the shape of the biosensor 1 is formed in planar view substantially rectangular shape, as shown in FIG. You may form so that the corner | angular part 1a of four corners may become circular arc shape. As described above, when the biosensor 1 is formed so that at least a part of the peripheral edge has an arc shape in a plan view, the biosensor 1 can be more effectively prevented from being peeled off. The biosensor 1 in which at least a part of the periphery is arcuate in a plan view is a concept including an elliptical shape and a circular shape in addition to the form shown in FIG.

  Moreover, in the said embodiment, although it demonstrated that the filler for adjusting the viscosity of the double-sided adhesive body 2 may be mixed in the above-mentioned adhesive forming the double-sided adhesive body 2, For example, the double-sided pressure-sensitive adhesive body 2 may be formed by mixing a filler excellent in heat dissipation. As a filler excellent in heat dissipation, the metal filler excellent in heat conductivity can be illustrated, for example. By thus forming the double-sided pressure-sensitive adhesive body 2 by mixing a filler having excellent heat dissipation, it is possible to prevent heat from being trapped between the biosensor 1 and the living body surface when the biosensor 1 is attached to the living body. it can. As a result, it is possible to reduce the amount of sweat at the site where biosensor 1 is attached, and to effectively prevent biosensor 1 from being peeled off by the moisture of the sweat. Further, a hygroscopic polymer such as acrylic polymer particles may be dispersed in the pressure-sensitive adhesive. When the double-sided pressure-sensitive adhesive body 2 is constituted using such an adhesive, the hygroscopic polymer absorbs sweat and can prevent stuffiness and rash due to sweat.

  Moreover, in the said embodiment, you may form the double-sided adhesive body 2 using the material containing the adhesive composition to which adhesive force falls by external stimuli, such as light irradiation, such as ultraviolet irradiation, heating, cooling, or electricity supply. . When the double-sided pressure-sensitive adhesive body 2 is formed of such a material, for example, the adhesive force of the double-sided pressure-sensitive adhesive body 2 is reduced by irradiating the used biosensor 1 with light, heating, cooling, or energizing. Thus, the detection unit can be easily separated from the double-sided pressure-sensitive adhesive body 2, and the detection unit 3 can be reused or the components constituting the detection unit 3 can be easily recycled. Moreover, you may form using the material containing the adhesive composition which adhesive force falls by the change of the moisture content of an adhesive, such as water swelling and drying. Thus, when forming the double-sided adhesive body 2 from the material containing the adhesive composition in which the adhesive strength decreases due to the change in the moisture content of the adhesive, for example, the biosensor 1 is used for a predetermined period, After the acquisition is completed, wetness of the biosensor 1 with running water or drying with a dryer or the like causes the water content of the double-sided adhesive body 2 to fluctuate significantly, and the adhesive strength decreases, thereby reducing the double-sided adhesive body 2 and the detection unit 3. Can be easily separated, and the detection unit 3 can be reused or the components constituting the detection unit 3 can be easily recycled. Here, for example, when the double-sided pressure-sensitive adhesive body 2 is formed by adding a water-absorbing material such as sodium polyacrylate to the pressure-sensitive adhesive composition, it absorbs moisture by wetting the biosensor 1 with running water to double-sided pressure-sensitive adhesive. The body 2 is significantly swollen, the shape retention and cohesiveness of the double-sided pressure-sensitive adhesive body 2 are reduced, and the adhesive strength of the double-sided pressure-sensitive adhesive body 2 is reduced. In addition, for example, when forming the double-sided pressure-sensitive adhesive 2 as a pressure-sensitive adhesive composition, such as an acrylic polymer or a silicone-based gel pressure-sensitive adhesive, by drying the biosensor 1 with a dryer or the like, The water | moisture content in the double-sided adhesive body 2 will reduce remarkably, the characteristic of a gel adhesive will be lost, and the adhesive force of the double-sided adhesive body 2 will fall. Further, the mechanism for reducing the adhesive force due to the change in the moisture content of the double-sided pressure-sensitive adhesive body 2 may be a mechanism for reducing the adhesive force due to the change in the solvent content. In addition, the adhesive force may be reduced by swelling the double-sided pressure-sensitive adhesive body 2 using a solvent other than water, such as alcohol for disinfection.

DESCRIPTION OF SYMBOLS 1 Biosensor 2 Double-sided adhesive body 3 Detection part 4 Electrode part 5 Covering body 6 Wiring member 7 Communication part

Claims (16)

A biological sensor that is attached to a living body and detects biological data,
A double-sided pressure-sensitive adhesive body having one surface adhered to a living body;
A detection unit that is disposed on the other surface of the double-sided pressure-sensitive adhesive body and detects biometric data;
An electrode unit disposed on one side of the double-sided adhesive body and electrically connected to the detection unit;
A biological sensor provided on the other surface of the double-sided pressure-sensitive adhesive body, and comprising a covering that covers the detection unit and the double-sided pressure-sensitive adhesive body.   The biosensor according to claim 1, wherein the thickness of the peripheral portion is formed thinner than the thickness of the central portion.   The biosensor according to claim 2, wherein an exposed surface shape of the covering body at the peripheral edge portion is an inclined surface that is inclined toward the central portion.   The biosensor according to claim 3, wherein the inclined surface is a curved surface.   The biosensor according to claim 3, wherein the inclined surface is formed by a plurality of flat surfaces.   The biosensor according to claim 1, wherein at least a part of the peripheral edge is formed in an arc shape in a plan view.   The biosensor according to any one of claims 1 to 6, wherein a static friction coefficient of the covering by a static friction coefficient test method is 1.0 or less.   The biosensor according to any one of claims 1 to 7, further comprising a communication portion that communicates the exposed surface side of the covering and the one surface side of the double-sided pressure-sensitive adhesive body.   The biosensor according to claim 8, wherein the communication part is formed as a coaxial through-hole penetrating the covering body and the double-sided adhesive body.   The biosensor according to any one of claims 1 to 9, further comprising a stretchable wiring that electrically connects the detection unit and the electrode unit.   The biosensor according to claim 1, wherein the covering has moisture permeability. The covering includes a core portion having moisture permeability, and a functional coating layer that coats the surface of the core portion,
The biosensor according to any one of claims 1 to 10, wherein the functional coating layer is at least one selected from the group consisting of a water-repellent layer, a waterproof layer, an antibacterial layer, and an antifouling layer.   The biosensor according to claim 1, wherein the covering body has elasticity.   The biosensor according to claim 1, wherein the double-sided pressure-sensitive adhesive body has moisture permeability.   The biosensor according to any one of claims 1 to 14, wherein the double-sided pressure-sensitive adhesive body is formed of a material including a pressure-sensitive adhesive composition whose adhesive force is reduced by an external stimulus. The biosensor according to any one of claims 1 to 15, wherein the double-sided adhesive body is a porous double-sided adhesive body.

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