Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K1/00—Printed circuits
  • H05K1/02—Details

Definitions

• the present invention relates to a stretchable wiring board and a current supply device.
• the EMS device (1) described in Patent Document 1 includes an external device (3) and an elastic wiring board (10), and the elastic wiring board (10) includes crimp-type conductive hooks (21a, 21b).
• the conductive hooks (21a, 21b) are assembled by crimping a cap portion (210) and a protrusion portion (220) so as to sandwich a non-elastic substrate (12).
• the cap portion (210) and the protruding portion (220) of the conductive hooks (21a, 21b) are crimped to sandwich the rigid non-stretchable substrate, so that the protruding portion (220) is exposed to the outside.
• the present invention provides an elastic wiring board that has a simple configuration and can be reliably mechanically and electrically connected to the device main body, and a current supply device that includes this elastic wiring board.
• a stretchable wiring board includes a stretchable sheet, a stretchable conductive layer, an external terminal, a first reinforcing portion, and a second reinforcing portion.
• the stretchable sheet has an opening penetrating in the thickness direction.
• the stretchable conductive layer is supported by the stretchable sheet.
• the external terminal is electrically connected to the stretchable conductive layer and is inserted into the opening.
• At least a portion of the first reinforcing portion is disposed on one side of the stretchable conductive layer, and at least a portion of the second reinforcing portion is disposed on the other side of the stretchable conductive layer, and the first reinforcing portion and the second reinforcing portion are configured to hold the external terminal therebetween and to reinforce at least the periphery of the external terminal of the stretchable conductive layer.
• This aspect allows for reliable mechanical and electrical connection with the device body with a simple configuration.
• 1A is a diagram showing a disassembled state of a current supply device according to a first embodiment
• (a) is a plan view of a stretchable wiring board
• (b) is a plan view of a device main body
• (c) is a bottom view of the device main body).
• 2 is a cross-sectional view taken along line AA in FIG. 1.
• 2 is a cross-sectional view showing a manufacturing process of the stretchable wiring board of FIG. 1.
• FIG. 4 is a cross-sectional view showing an elastic wiring board according to a second embodiment.
• FIG. 13A and 13B are views showing a disassembled state of a current supply device according to a third embodiment ((a) is a plan view of a stretchable wiring board, and (b) is a bottom view of the device body).
• 6 is a cross-sectional view taken along line BB in FIG. 5.
• FIG. 11 is a cross-sectional view showing an elastic wiring board according to a fourth embodiment.
• the program for realizing the software appearing in this embodiment may be provided as a non-transitory computer-readable recording medium, or may be provided so that it can be downloaded from an external server, or may be provided so that the program is started on an external computer and its functions are realized on a client terminal (so-called cloud computing).
• a "unit” can also include, for example, hardware resources implemented by a circuit in the broad sense, and software information processing that can be specifically realized by these hardware resources.
• this embodiment handles various types of information, which can be represented, for example, by physical values of signal values representing voltage and current, high and low signal values as a binary bit collection consisting of 0 or 1, or quantum superposition (so-called quantum bits), and communication and calculations can be performed on a circuit in the broad sense.
• a circuit in the broad sense is a circuit that is realized by at least appropriately combining a circuit, circuitry, a processor, and memory.
• ASICs application specific integrated circuits
• SPLDs simple programmable logic devices
• CPLDs complex programmable logic devices
• FPGAs field programmable gate arrays
• FIG. 1 is a diagram showing an exploded state of a current supply device according to a first embodiment ((a) is a plan view of an elastic wiring board, (b) is a plan view of a device main body, and (c) is a bottom view of the device main body).
• FIG. 2 is a cross-sectional view along line A-A in FIG. 1.
• FIG. 3 is a cross-sectional view showing a manufacturing process of the elastic wiring board of FIG. 1.
• FIG. 1(b) will be referred to as "front” or “top”
• the back side of the paper will be referred to as “back” or “bottom”
• the back side of the paper in Fig. 1(c) will be referred to as “front” or “top”
• the front side of the paper will be referred to as “back” or “bottom”.
• the upper side in Fig. 2 and Fig. 3(b) to (d) will be referred to as “front” or “top”
• the lower side will be referred to as “back” or “bottom”
• the lower side in Fig. 3(a) will be referred to as “front” or “top”
• the upper side will be referred to as “back” or “bottom”.
• the current supply device 100 shown in FIG. 1 is a device that supplies a current to a living body, and includes a stretchable wiring board 1 and a device main body 10 that is attached to the stretchable wiring board 1 .
• the stretchable wiring board 1 includes a stretchable sheet 2, a stretchable conductive layer 3, a bioadhesive layer 4, a pair of hook parts (external terminals) 5, a first reinforcing part 6, and a second reinforcing part 7.
• the stretchable conductive layer 3 and the first reinforcing part 6 located on the back side (lower side) of the stretchable sheet 2 are shown in a see-through manner.
• the stretchable wiring board 1 is configured so that the stretchable conductive layer 3 is used as the side facing the skin of the user. As shown in FIG. 1, the stretchable sheet 2 (stretchable wiring board 1) has an elongated shape. In such a configuration, a plurality of elastic wiring boards 1 having shapes suitable for the area of the skin surface to be treated may be provided. In this case, by selecting a predetermined elastic wiring board 1 and using it by attaching it to the device main body 10, it becomes easier to more reliably perform skin treatment according to the user's requirements.
• the stretchable sheet 2 has a function of supporting each part including the stretchable conductive layer 3.
• This stretchable sheet 2 is stretchable in any direction.
• the constituent material of the stretchable sheet 2 is not particularly limited, but examples thereof include elastomer materials such as nitrile rubber, latex rubber, urethane-based elastomers, etc.
• elastomer materials such as nitrile rubber, latex rubber, urethane-based elastomers, etc.
• the thickness of the elastic sheet 2 is not particularly limited, but from the viewpoint of not hindering the elastic movement of the skin surface of the living body to which the elastic wiring board 1 is applied, it is preferably about 100 ⁇ m or less, more preferably about 25 ⁇ m or less, and even more preferably about 10 ⁇ m or less.
• the maximum elongation of the stretchable sheet 2 is preferably about 10% or more, more preferably about 50% or more, even more preferably about 100% or more, and particularly preferably about 200% or more. If the stretchable sheet 2 is made of the above-mentioned material, the maximum elongation can be, for example, about 300% or more.
• the maximum elongation of the elastic sheet 2 refers to the maximum value of the elongation at which the sheet can be elastically deformed in one in-plane direction.
• the elongation refers to the ratio of elongation in one in-plane direction due to the application of force to the dimension when no external force is applied (dimension with elongation rate of 0%). For example, an elongation rate of 50% is 1.5 times the dimension with elongation rate of 0%, and an elongation rate of 100% is twice the dimension with elongation rate of 0%.
• the elastic sheet 2 has an opening 21 penetrating in the thickness direction thereof.
• the hook portion 5 is inserted into this opening 21 and is exposed to the outside of the elastic wiring board 1.
• the stretchable conductive layer 3 is supported on the lower surface (the other surface) of the stretchable sheet 2.
• This stretchable conductive layer 3 may be disposed in direct contact with the stretchable sheet 2, or may be disposed via an intermediate layer for any purpose.
• the elastic conductive layers 3 are provided in a pair on the left and right sides, and the two elastic conductive layers 3 have approximately the same shape.
• the number of elastic conductive layers 3 is not limited to two, and there may be three or more. In this case, the multiple elastic conductive layers 3 may have the same shape or different shapes.
• the stretchable conductive layer 3 can be made of, for example, a composite material (stretchable conductive material) containing a conductive filler and an elastomer.
• the conductive filler include carbon materials such as carbon nanotubes and carbon nanohorns, and metal materials such as gold, silver, copper, and nickel.
• the elastomer include thermoplastic elastomers such as polyamide-based thermoplastic elastomers, polyester-based thermoplastic elastomers, and urethane-based thermoplastic elastomers, and rubber materials such as ethylene propylene rubber, neoprene rubber, natural rubber, and silicone rubber. With such a composite material, the stretchable conductive layer 3 can be produced relatively easily using a printing method.
• the thickness and width of the elastic conductive layer 3 can be determined based on the resistance change of the elastic conductive layer 3 when the elastic sheet 2 is stretched, as well as the constraints of the overall thickness and width of the elastic wiring board 1. From the viewpoint of ensuring good elasticity by following the dimensional changes of the elastic sheet 2 when stretched, the width of the elastic conductive layer 3 is preferably about 1000 ⁇ m or less, more preferably about 500 ⁇ m or less, and even more preferably about 200 ⁇ m or less. The thickness of the elastic conductive layer 3 is preferably about 25 ⁇ m or less, and more preferably about 10 ⁇ m or more and 15 ⁇ m or less.
• a bioadhesive layer 4 is provided on the lower surface (the other surface) of the stretchable conductive layer 3.
• This bioadhesive layer 4 is configured to be attached to the skin surface of a user. That is, the bioadhesive layer 4 has a function of holding the entire current supply device 100 on the skin surface of the user. As shown in Fig. 2, the bioadhesive layer 4 is also provided in a pair on the left and right, and the two bioadhesive layers 4 have approximately the same shape.
• Each bioadhesive layer 4 has a size that encompasses the elastic conductive layer 3 in a planar view.
• the number of bioadhesive layers 4 is not limited to two, and may be three or more. In this case, the multiple elastic conductive layers 3 may have the same shape or different shapes.
• the bioadhesive layer 4 can be obtained by supplying the bioadhesive layer forming material before gelation onto a release sheet to form a coating film, impregnating the coating with an electrolyte solution, or crosslinking the coating.
• the bioadhesive layer forming material before gelation may be supplied so as to cover the stretchable conductive layer 3, and crosslinked to obtain the bioadhesive layer 4.
• the crosslinking (polymerization) method include a method in which the bioadhesive layer-forming material is heated, irradiated with light, or irradiated with radiation.
• the bioadhesive layer 4 is also stretchable in any direction.
• the bioadhesive layer 4 is preferably a gel having adhesive power to the skin surface, particularly a high water content adhesive gel, that is, the bioadhesive layer 4 is preferably in the form of a gel.
• the thickness of the bioadhesive layer 4 is not particularly limited, but from the viewpoint of ensuring high conformability of the elastic wiring board 1 to the skin surface and the mechanical strength of the bioadhesive layer 4, it is preferably about 50 ⁇ m or more and 1000 ⁇ m or less, and more preferably about 100 ⁇ m or more and 750 ⁇ m or less.
• the bioadhesive layer 4 is not limited to a configuration that covers the entire stretchable conductive layer 3, but can be a configuration that covers only a portion of the stretchable conductive layer 3.
• the stretchable wiring board 1 is attached such that the stretchable conductive layer 3 is in direct contact with the skin surface in areas where the bioadhesive layer 4 is not present, and the bioadhesive layer 4 is in direct contact with the skin surface in areas where the bioadhesive layer 4 is present.
• the presence of the bioadhesive layer 4 ensures that the stretchable wiring board 1 remains attached to the user's skin surface, while a stronger current can be used to provide muscle stimulation to the skin surface where the stretchable conductive layer 3 is in direct contact.
• the hook portion (external terminal) 5 is electrically connected to the elastic conductive layer 3 and is inserted into the opening 21 .
• the hook portion 5 is configured as a single part. This allows the number of parts of the stretchable wiring board 1 to be reduced.
• the hook portion 5 is a plate molded product, it is possible to make the hook portion 5 itself thin. This can contribute to making the stretchable wiring board 1 as a whole lighter and/or thinner.
• the hook portion 5 has a columnar portion 51 that is inserted into the opening 21 and a flange portion 52 that protrudes laterally from the columnar portion 51, but may have a shape in which the flange portion 52 is omitted, i.e., may be a columnar part.
• the hook portion 5 preferably includes a soft magnetic material or a magnetized hard magnetic material.
• a soft magnetic material is a material that is easily magnetized by applying a magnetic field and returns to its original state by removing the magnetic field, and examples of such a material include pure iron and low carbon steel.
• the hook portion 5 may be formed by plating a core made of a soft magnetic material with copper and/or nickel. Plating the core can increase the electrical conductivity of the hook portion 5 and provide the hook portion 5 with anti-corrosive properties.
• examples of magnetized hard magnetic bodies include alnico magnets.
• At least a portion of the first reinforcing portion 6 is disposed on the upper surface (one surface) of the stretchable conductive layer 3, and at least a portion of the second reinforcing portion 7 is disposed on the lower surface (the other surface) of the stretchable conductive layer 3.
• the hook portion 5 is held between them, and they are configured to reinforce at least the periphery of the hook portion 5 of the stretchable conductive layer 3. This prevents the hook portion 5 from falling off the stretchable wiring board 1, even if the device main body 10 is repeatedly attached to and detached from the stretchable wiring board 1, and can suitably prevent or suppress damage to the stretchable wiring board 1.
• the first reinforcing portion 6 is a reinforcing film having a film-like shape.
• the first reinforcing portion 6 is a flexible member having a larger Young's modulus than the stretchable sheet 2.
• it is preferable that the first reinforcing portion 6 is a member having a lower stretchability than the stretchable sheet 2 and substantially having almost no stretch.
• a synthetic resin with low sliding properties, corrosion resistance, and high strength is not particularly limited, but examples thereof include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polyphenylene sulfide (PPS), and fluororesin.
• PET polyethylene terephthalate
• PEN polyethylene naphthalate
• PI polyimide
• PPS polyphenylene sulfide
• fluororesin fluororesin.
• the first reinforcing portion 6 made of such a material has high mechanical strength and can further improve the effect of preventing damage to the stretchable wiring board 1.
• the first reinforcing portion 6 can also be made of a paper material (e.g., cellulose nanofiber paper) that has a suitable durability.
• the thickness of the first reinforcing portion 6 is preferably about 10 ⁇ m or more and about 200 ⁇ m or less, more preferably about 25 ⁇ m or more and about 150 ⁇ m or less, and even more preferably about 50 ⁇ m or more and about 100 ⁇ m or less. This makes it possible to sufficiently increase the mechanical strength and non-stretchability of the first reinforcing portion 6.
• the overall thickness of the stretchable wiring board 1 can also be suppressed.
• At least a portion of the first reinforcing portion (reinforcing film) 6 is located between the stretchable sheet 2 and the stretchable conductive layer 3. In this case, the first reinforcing portion 6 can be brought close to the hook portion 5, so that the holding force of the first reinforcing portion 6 to the hook portion 5 can be more stabilized.
• the first reinforcing part (reinforcing film) 6 has a through-hole 61 penetrating in its thickness direction, and overlaps at least a part of the flange 52 in a state where the columnar part 51 of the hook part 5 is inserted into the through-hole 61. This makes it possible to further stabilize the holding force of the hook part 5 by the first reinforcing part 6.
• a portion of the stretchable conductive layer 3 is located between the flange 52 of the hook portion 5 and the stretchable sheet 2.
• the stretchable conductive layer 3 is electrically connected to the hook portion (external terminal) 5 by directly contacting the flange 52. This makes it possible to obtain an accurate and reliable electrical connection between the stretchable conductive layer 3 and the hook portion 5.
• the second reinforcing portion 7 is a film-shaped reinforcing film.
• the second reinforcing portion (reinforcing film) 7 includes a film substrate 71 and an adhesive layer 72 supported by the film substrate 71 and in contact with the hook portion (external terminal) 5. This configuration makes it easier to bond the second reinforcing portion 7 to the adhesive body (laminate) of the stretchable sheet 2, the stretchable conductive layer 3, and the first reinforcing portion 6.
• the film substrate 71 may be made of the same material as that of the first reinforcing portion (reinforcing film) 6 .
• the thickness of the film substrate 71 is not particularly limited, but is preferably about 25 ⁇ m to 250 ⁇ m, more preferably about 50 ⁇ m to 200 ⁇ m, and even more preferably about 50 ⁇ m to 100 ⁇ m, which can sufficiently increase the mechanical strength and non-stretchability of the film substrate 71.
• Examples of materials constituting the adhesive layer 72 include acrylic adhesives, urethane adhesives, silicone adhesives, natural rubber adhesives, synthetic rubber adhesives, etc. These adhesives may be used alone or in combination of two or more.
• the thickness of the adhesive layer 72 is not particularly limited, but is preferably about 5 ⁇ m to 200 ⁇ m, more preferably about 15 ⁇ m to 150 ⁇ m, and even more preferably about 15 ⁇ m to 50 ⁇ m.
• the stretchable wiring board 1 as described above can be manufactured as follows. [1] First, prepare an elastic sheet 2 to which a carrier sheet CS is attached, and then attach a first reinforcing portion (reinforcing film) 6 to the elastic sheet 2 (see FIG. 3(a)). Note that FIG. 3(a) is upside down compared to the usage state. [2] Next, the through-holes CS1 are formed in the carrier sheet CS, the openings 21 are formed in the stretchable sheet 2, and the through-holes 61 are formed in the first reinforcing portion 6 in succession (see FIG. 3(a)). This can be easily formed by, for example, punching with a punch, drilling with a drill, laser processing, or the like.
• a stretchable conductive layer 3 having a predetermined pattern is formed on the first reinforcing portion 6 and the upper surface (lower surface in use) of the stretchable sheet 2 (see FIG. 3(a)).
• This can be easily formed by using the stretchable conductive material, for example, by a printing method. Examples of printing methods include screen printing, droplet ejection (inkjet), gravure printing, roll coat printing, and knife coat printing.
• the hook portion 5 is fixed to the upper surface of the adhesive layer 72 of the second reinforcing portion (reinforcing film) 7 (see FIG. 3(b)).
• the second reinforcing part 7 to which the hook part 5 is fixed is attached to the elastic conductive layer 3 (see FIG. 3(c)).
• the hook part 5 is inserted through the through part 61 and the opening 21, and its upper end part (tip part) is positioned within the through part CS1. Also, at this time, the flange part 52 of the hook part 5 is brought into contact with the elastic conductive layer 3.
• the adhesive body (laminate) is heated and pressurized as necessary.
• the elastic conductive layer 3 is made of an elastic conductive material, the elastomer is softened by heating and pressurization, thereby improving the adhesion between the conductive filler and the hook portion 5. This improves the connection reliability between the elastic conductive layer 3 and the hook portion 5.
• a bioadhesive layer 4 is attached to the lower surface of the adhesive body (see FIG. 3(d)). It is preferable to keep a release film attached to the lower surface of the bioadhesive layer 4 until use. This improves the handleability of the bioadhesive layer 4 during production and the handleability of the stretchable wiring board 1 after production. Thereafter, punching is performed to obtain the outer shape of the stretchable wiring board 1, and the carrier sheet CS is peeled off, thereby completing the stretchable wiring board 1.
• the device main body 10 is attached to such a stretchable wiring board 1 .
• the device body 10 has a magnetic hook portion (connection terminal) 101 on its underside.
• the magnetic hook portion 101 has a recess 101a in its center.
• a ring-shaped permanent magnet (e.g., a ferrite magnet or a neodymium magnet) 101b is housed inside the magnetic hook portion 101.
• Such a device main body 10 is attached to the stretchable wiring board 1 by connecting the magnetic hook portion (connection terminal) 101 to the hook portion (external terminal) 5. Specifically, by inserting the tip of the columnar portion 51 of the male hook portion 5 into the recess 101a of the female magnetic hook portion 101, they can be brought into physical contact to ensure electrical connection.
• the magnetic force of the permanent magnet 101b can ensure mechanical connection between the magnetic hook portion 101 and the hook portion 5. Therefore, high connection reliability can be obtained between the stretchable wiring board 1 and the device main body 10.
• connection terminal connection terminal having magnetic force
• the hook portion 5 is attracted to the magnetic hook portion 101, and the flange portion 52 presses the elastic conductive layer 3.
• the device main body 10 is configured to supply a current to the stretchable conductive layer 3 in a state where it is attached to the stretchable wiring board 1 .
• the connection terminal is configured with a magnet hook part, but the connection terminal may be configured with a spring hook part.
• buttons 102 are provided on the surface of the device main body 10. These operation buttons 102 can change at least one of the amount of power supply or the supply pattern (mode). Note that changing the amount of power supply also includes turning the power supply (power source) on and off.
• a power supply unit, a control unit, and an electric circuit unit are provided inside the device main body 10. The power supply unit, the electric circuit unit, and two operation buttons 102 are electrically connected to the control unit, and two magnetic hook units 101 are electrically connected to the electric circuit unit.
• the power supply unit is configured to supply power to the elastic conductive layer 3.
• a dry cell, a solar cell, a fuel cell, a lithium ion secondary battery, a solid-state battery, a lithium polymer battery, etc. can be used for this power supply unit.
• the power supply unit may be a connector to which a power cable can be connected.
• the electric circuit section includes, for example, a drive circuit, an output waveform generating circuit, a transformer, a switching circuit, and the like.
• the control unit is configured to control, via the electric circuit unit, the power supplied from the power supply unit to the elastic conductive layer 3.
• controlling the power means setting at least one of the voltage value, the current value, the waveform, the frequency, the pulse width, the current direction, and the current flow time.
• the current supplied by the device main body 10 under the control of the control unit can be a current for providing muscle stimulation, a current for heating the skin surface, or the like.
• the type (mode) of current supplied by the device main body 10 can be changed by operating the operation button 102 .
• FIG. 4 is a cross-sectional view showing the stretchable wiring board according to the second embodiment.
• the upper side in FIG. 4 will also be referred to as the "front" or “top”, and the lower side will also be referred to as the "back" or "bottom”.
• the stretchable wiring board 1 of the second embodiment further includes a conductive connection member 8 that is interposed between the flange portion 52 and the stretchable conductive layer 3 and electrically connects them.
• the conductive connection member 8 may be a metal foil, but is preferably a conductive double-sided tape.
• the conductive double-sided tape can be composed of an adhesive tape in which conductive particles containing silver, gold, nickel, etc. are dispersed.
• the conductive connection member 8 may be attached to a predetermined position of the elastic conductive layer 3 prior to the step of FIG. 3(b).
• the first reinforcing part (reinforcing film) 6 may be provided on the upper surface side of the stretchable sheet 2.
• the second reinforcing part (reinforcing film) 7 may be composed of only the film substrate 71, omitting the adhesive layer 72.
• the first reinforcing part (reinforcing film) 6 and the film substrate 71 may be joined by fusion, for example.
• FIG. 1 is a plan view of a stretchable wiring board, and (b) is a bottom view of a device body).
• FIG. 6 is a cross-sectional view of line B-B in FIG. 5.
• the front side of the paper in Fig. 5(a) will be referred to as “front” or “top”
• the back side of the paper will be referred to as “back” or “bottom”
• the back side of the paper in Fig. 5(b) will be referred to as “front” or “top”
• the front side of the paper will be referred to as “back” or “bottom”.
• the upper side in Fig. 6 will be referred to as “front” or “top”
• the lower side will be referred to as "back” or "bottom”.
• the device body 10' includes a columnar portion 101' as a connection terminal.
• the stretchable wiring board 1' includes a columnar magnet portion 5' including a magnetized hard magnetic body as an external terminal.
• the first reinforcing portion 6' is a block-shaped reinforcing block.
• the first reinforcing portion (reinforcing block) 6' has a through portion 61' that penetrates in the thickness direction and exposes the magnet portion (external terminal) 5'.
• the through portion 61' and the magnet portion 5' form a recess, and the columnar portion 101' is configured to be inserted into the recess.
• the second reinforcing portion 7' is also a film-shaped reinforcing film.
• This second reinforcing portion (reinforcing film) 7' includes a film substrate 71' and a conductive adhesive layer 72' supported by the film substrate 71' and in contact with the magnet portion (external terminal) 5'.
• the film substrate 71' can have the same configuration as the film substrate 71.
• the adhesive layer 72' can be formed by dispersing conductive particles (conductive filler) in the adhesive layer 72.
• the magnet portion (external terminal) 5' is electrically connected to the stretchable conductive layer 3 via an adhesive layer 72'.
• the first reinforcing portion (reinforcing block) 6′ is bonded to the second reinforcing member (reinforcing film) 7′ via a non-conductive adhesive layer 9.
• the adhesive layer 9 can have a configuration similar to that of the adhesive layer 72.
• the current supply device 100' of the third embodiment also provides the same functions and effects as the current supply devices 100 of the first and second embodiments.
• the columnar portion 101' which is the connection terminal of the device main body 10', may or may not have magnetism.
• the external terminal of the stretchable wiring board 1' may be configured of a soft magnetic material that does not have magnetism.
• the position of the underside of the first reinforcing portion (reinforcing block) 6' may be a position above the stretchable sheet 2, or may be any position within the range of the thickness of the stretchable sheet 2 and the stretchable conductive layer 3. In any position, the magnet portion (external terminal) 5' can be stably held between the first reinforcing portion (reinforcing block) 6' and the second reinforcing portion (reinforcing film) 7'.
• the first reinforcing portion (reinforcing block) 6' of the fourth embodiment has a larger portion of its lower side located within the opening 21 of the stretchable sheet 2 than the first reinforcing portion (reinforcing block) 6' of the third embodiment. This makes it possible to reduce the thickness of the stretchable wiring board 1'.
• the conductive adhesive layer 72' is bonded to the first reinforcing portion 6' or the stretchable conductive layer 3 via the adhesive layer 9.
• the adhesive layer 72' is in contact with the magnet portion 5' and is in contact with the stretchable conductive layer 3 at a location not shown. In this configuration, the magnet portion 5' is electrically connected to the stretchable conductive layer 3 via the adhesive layer 72'.
• the adhesive layer 72' is conductive, a large space 11' is formed in the center of the elastic wiring board 1', preventing the left and right adhesive layers 72' from coming into contact and becoming conductive.
• the adhesive layer 9 may be omitted and a conductive adhesive layer 72' may be bonded to the first reinforcing portion 6', in which case the configuration in which the left and right adhesive layers are separated is maintained.
• a stretchable wiring board comprising a stretchable sheet, a stretchable conductive layer, an external terminal, a first reinforcing portion, and a second reinforcing portion, the stretchable sheet having an opening penetrating in the thickness direction thereof, the stretchable conductive layer being supported by the stretchable sheet, the external terminal being electrically connected to the stretchable conductive layer and being inserted through the opening, at least a portion of the first reinforcing portion being disposed on one side of the stretchable conductive layer, and at least a portion of the second reinforcing portion being disposed on the other side of the stretchable conductive layer, the stretchable wiring board being configured to hold the external terminal therebetween and to reinforce at least the periphery of the external terminal of the stretchable conductive layer.
• the external terminal has a columnar portion inserted into the opening and a flange portion protruding laterally from the columnar portion, and the reinforcing film has a through-portion penetrating through the thickness direction thereof, and overlaps at least a portion of the flange portion when the columnar portion is inserted through the through-portion.
• a stretchable wiring board according to any one of (5) to (7) above, wherein the external terminal includes a soft magnetic material or a magnetized hard magnetic material, and is configured such that when a connecting terminal having a magnetic force is brought close to the external terminal from the one surface side, the external terminal is attracted to the connecting terminal and the flange portion presses against the stretchable conductive layer.
• the external terminal includes a soft magnetic material or a magnetized hard magnetic material
• the first reinforcing part is a block-shaped reinforcing block
• the reinforcing block has a through-portion that penetrates in its thickness direction and exposes the external terminal.
• the second reinforcing portion is a film-shaped reinforcing film
• the reinforcing film comprises a film substrate and a conductive adhesive layer supported by the film substrate and in contact with the external terminal.
• the second reinforcing portion is a film-shaped reinforcing film
• the reinforcing film includes a film substrate and an adhesive layer supported by the film substrate and in contact with the external terminal.
• a device for supplying electric current to a living organism comprising: an elastic wiring board according to any one of (1) to (15) above; and a device main body, wherein the elastic wiring board is configured to use the elastic conductive layer as the skin side of a user; and the device main body has a connection terminal, and is attached to the elastic wiring board by connecting the connection terminal to the external terminal, and is configured to supply electric current to the elastic conductive layer.
• a current supply device is not the case.

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• 2023
  • 2023-07-31 JP JP2024514714A patent/JP7707423B2/ja active Active
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