JP2020072155A - Stretchable elastic sheet and stretchable conductive wiring module having the same - Google Patents

Abstract

To provide a stretchable elastic sheet that has sufficient elasticity and flexibility, can be made lighter, thinner, and smaller, can exhibit high elongation rate and low stress, has excellent resilience and robustness that withstands repeated expansion and contraction and does not cause deterioration of elasticity, is less likely to break during stretching, and has excellent durability.SOLUTION: A stretchable elastic sheet 1 includes a peripheral connecting portion row 15formed by peripheral connecting portions 15a, ..., and 15e connected between a long side 10a and aligned through slits 13a, ..., and 13e, and intersecting the longitudinal direction A, notch slits 12a, ..., and 12f cut from the long side 10a facing each other inward, and an inter-cutting joint row 14formed by inter-cutting joints 14a, ..., and 14f connected between the respective notch slits 12a, ..., and 12f facing each other, and the peripheral connecting portion row 15and/or the inter-cutting joint row 14are short in the middle.SELECTED DRAWING: Figure 1

Description

  INDUSTRIAL APPLICABILITY The present invention provides an elastic sheet that can be stretched / restored and exhibits a unique stretching property accompanied by three-dimensional deformation by applying / releasing tensile stress in the stretching direction, and a wearable device, a flexible substrate, or the like using the elastic sheet. The present invention relates to a stretchable conductive wiring module which is a wiring component of a flexible device.

  The electronic device used to be one in which wiring is provided on a hard silicon substrate, a glass substrate, or the like to mount an electronic component such as an IC chip. Recently, electronic devices such as wearable devices, medical devices, physical performance measuring devices, and movable devices of industrial robots have been used as flexible electronic components having flexible wiring materials, wiring boards, etc. that can follow the movement of a living body. It started to come.

  For this reason, electronic devices are required to be lightweight, thin, and compact, and also have flexibility and resilience such as sufficient flexibility and stretchability, and robustness that does not break during extension and does not reduce elasticity after repeated extension and contraction. And is required.

  Such flexibility of electronic devices in the electronics field has attracted a great deal of attention due to the rise of wearable devices and the like, and various manufacturers are developing stretchable wiring using conductive fibers. For example, in Patent Document 1, a sheet form having a fibrous structure is formed by a raw material fiber having a non-conductive yarn having a non-conductive yarn surface and a conductive coating film formed on the yarn surface of the non-conductive yarn. Anisotropic conductive fabrics are disclosed.

  Further, a sheet-like flexible substrate has been developed that is much lighter, thinner, and smaller than a bulky wiring device such as a curl cord. For example, Patent Document 2 discloses a stretchable flexible substrate including an insulating base material and wiring provided on the insulating base material, the insulating base material having a plurality of surface-bonded joints. A stretchable flexible substrate having a honeycomb structure and having an opening formed between the joints is disclosed.

  Further, Patent Document 3 discloses a force sensor which focuses on the elasticity of a cut paper structure and has a sheet having cut paper structure cuts formed alternately and a holding means for holding a measurement target. ing.

  Further, Non-Patent Document 1 also discloses a sheet having sufficient elasticity by slit processing provided such that a group of slits of rubber arranged in a row are arranged while being vertically shifted.

  High stretch rate and low stress can be expressed with a simpler structure than the conventionally known stretchable flexible substrate having anisotropic conductive fabric or honeycomb structure, and has sufficient flexibility and excellent resilience and robustness. An elastic sheet has been desired. Also, in a cut sheet structure cut sheet in which the same cut sheet structure unit is simply repeated, since the cut portion is fragile, it easily breaks randomly at the point of the cut tip at the time of extension. There has been a demand for an elastic sheet that is difficult to break and can control the break. Furthermore, by making this elastic sheet conductive, it exhibits high conductivity and high insulation to the wiring parts of flexible devices, and also has a high extension rate, low stress, sufficient flexibility, and excellent resilience. There has been a demand for a stretchable conductive wiring module that exhibits high durability and robustness.

JP, 2017-128827, A JP-A-2015-198101 International Publication No. 2017/179716

Ruike Zhao et al., Kirigami enhances film adhesion, Soft Matter (2018). DOI: 10.1039 / C7SM02338C

  The present invention has been made to solve the above-mentioned problems, and has sufficient flexibility and flexibility such as stretchability, which enables weight reduction, thinning, and miniaturization, and has a high elongation rate and low stress. The purpose of the present invention is to provide a stretchable elastic sheet that has excellent resilience and robustness that endures repeated stretch and does not cause a decrease in stretchability, is hard to break during stretching, and has excellent durability. To do. Furthermore, by using the stretchable elastic sheet, it has high conductivity inside and high insulation to the outside, and has high elongation rate, low stress, sufficient flexibility, and excellent resilience and robustness. It is an object of the present invention to provide a stretchable conductive wiring module as shown.

  Stretchable elastic sheet made to achieve the above-mentioned object, a plurality of through slits and / or a plurality of through holes arranged in series and / or in parallel while intersecting the longitudinal direction of the rectangular rubber elastic sheet piece, A peripheral connecting portion row composed of a plurality of peripheral connecting portions connected between the through slit and / or the through hole and the long side of the rubber elastic sheet piece, and the plurality of through slits and / or the plurality of through holes. A plurality of cutting slits and / or a plurality of cutting holes which are provided alternately with each other from both the long sides of the rubber elastic sheet piece while facing each other inwardly, and the cutting slits and / or each facing each other. Or a stretchable elastic sheet having an inter-cutting connecting part row composed of a plurality of inter-cutting connecting parts connected between the cutting holes, wherein the peripheral connecting part row and the cut With the inter-connecting line The lateral width of at least one of the peripheral connecting portions and / or the inter-cutting connecting portions in the middle of these rows is shorter than the lateral width of the peripheral connecting portions and / or the inter-cutting connecting portions at the end of each row. It is characterized by being

  This stretchable elastic sheet, for example, in the peripheral connecting portion row and the inter-cut connecting portion row, the lateral width of the peripheral connecting portion and / or the inter-cut connecting portion, in the middle of these rows, in order. It is becoming shorter.

  In this stretchable elastic sheet, the shortest lateral width of the peripheral connecting portion and / or the inter-cut connecting portion among the peripheral connecting portion row and the inter-cut connecting portion row is the rubber elastic sheet piece. It is preferable that the width is 1/50 to 1/2.

  In this stretchable elastic sheet, the shortest lateral width of the peripheral connecting portion and / or the lateral width of the inter-cut connecting portion of the peripheral connecting portion row and the inter-cut connecting portion row is at least 0. It may be 1 mm.

  In this stretchable elastic sheet, the through slit or the slit slit has a through hole at each end, and / or the through hole or the slit hole is rounded at each corner. May be.

  In this stretchable elastic sheet, the rubber elastic sheet piece is made of silicone rubber, silicone resin, polyurethane, plastic elastomer, ethylene propylene rubber, ethylene-propylene-diene-methylene rubber, fluororubber, and And / or those made of natural rubber.

  This stretchable elastic sheet has a plurality of punched holes in which a flexible conductive base material having a conductive layer is penetrated by punching slits and / or punching holes arranged in series and / or in parallel along the current-carrying direction of the conductive layer. The peripheral portions are connected to each other by a bridging neck so as to be able to conduct electricity, and at least a part of the conductive base material is sealed and covered with the rubber elastic sheet piece without being exposed, and is composed of a plurality of bridging necks. The width of at least one of the bridge necks in the middle of the bridge among the bridge neck rows is shorter than the width of the bridge neck at the end of the row, and the insulating rubber elastic sheet piece is provided at the extraction peripheral portion. Together, the punched hole and the through slit smaller than the punch slit and / or the through hole penetrates, and the conductive base material has a punch gap between the plurality of punch peripheral portions, respectively. , The above Arm elastic sheet pieces, in accordance with the said vent gap may be that penetrates a small the cut slit and / or the cutout holes than the vent gap.

  In this stretchable elastic sheet, it is preferable that the lateral width of the bridging neck becomes shorter in the middle of the bridging neck row.

  In this stretchable elastic sheet, for example, both sides of the conductive base material are covered and sealed by the rubber elastic sheet pieces while covering at least the extracted peripheral edge portion.

  In this stretchable elastic sheet, the conductive base material may be provided in a single or plural number along the longitudinal direction.

  In the stretchable elastic sheet, the extracted peripheral edge portion may be thicker on the long side than on the inner side.

  In this stretchable elastic sheet, the conductive base material may have the conductive layer on a flexible support.

  In this stretchable elastic sheet, for example, the conductive layer is a metal film layer, an organic conductive film layer, and / or a conductive inorganic substance-containing conductive film layer.

  In this stretchable elastic sheet, the punch slit has a through hole at each end, and / or at least one of the punch hole, the punch gap, the punch peripheral portion, and the bridging neck. It may be that the corners are rounded at each corner.

  In this stretchable elastic sheet, the conductive base material may have an electrical connection connector at an end of the conductive layer.

  The stretchable elastic sheet may be characterized in that the rubber elastic sheet piece is made of conductive rubber.

  In this stretchable elastic sheet, the rubber elastic sheet piece may have an electrical connection connector at an end thereof.

  An elastic conductive wiring module made to achieve the above object is characterized by having a single elastic elastic sheet or a plurality of elastic elastic sheets.

  In this stretchable conductive wiring module, for example, a plurality of stretchable elastic sheets are overlapped and integrated.

  In this stretchable conductive wiring module, it is preferable that each of the plurality of conductive base materials is a terminal at a terminal, and the terminal is connected to an external terminal.

  In this stretchable conductive wiring module, for example, the plurality of conductive base materials are a pair or a plurality of pairs of electrodes.

  The stretchable elastic sheet of the present invention has through slits or through holes and slits or slits, so that they are opened in response to tensile stress application in the stretching direction and stretched and stretched with three-dimensional deformation. Upon stress release, they develop a unique stretching property with the closing contraction. This stretchable elastic sheet has excellent resilience and robustness that quickly recovers the original shape before stretching after releasing the tensile stress even after repeated stretching. Therefore, the elastic elastic sheet has high durability because it suppresses permanent deformation of the shape due to expansion and contraction due to the elastic characteristics and shape characteristics of the rubber elastic sheet piece. This stretchable elastic sheet has a very small tensile stress applied to it in the stretchable movement, especially in the low stretch region, and has unique mechanical properties, and is easy to use in the practical region.

  Moreover, the so-called cut paper sheet having a repeating monotonous cut paper structure tends to concentrate tensile stress at the peripheral connection part and the connection part between cuts at the time of extension, so that it suddenly occurs at the weakest point in the row end or in the middle of the row. Easy to break. On the other hand, this stretchable elastic sheet has a lateral width of the peripheral connecting portion and the inter-cutting connecting portion that is shorter in the middle of the row than the row ends, and is particularly shorter in the middle of the row, so that the stretchable elastic sheet is It suppresses the expansion and contraction of the wiring end that is most susceptible to disconnection, making it difficult to break.

  This stretchable elastic sheet is obtained by sealing a flexible conductive base material having a conductive layer while having a punched hole or a slit and covering it with a rubber elastic sheet piece having a through slit or a through hole. The conductive base material can be expanded and contracted. In such a stretchable elastic sheet, the conductive base material has a plurality of perforations and slits so that the conductive layer can be deformed by stretching according to tension and restoration according to subsequent release. Can be followed and has excellent durability as a conductive wiring. Moreover, in this stretchable elastic sheet, the path length of the conductive layer in the conductive base material does not change due to stretching, and the resistance value hardly changes even when stretching. Therefore, it is extremely excellent as a wiring material.

  Further, this stretchable elastic sheet is made of silicone rubber, silicone resin, polyurethane, plastic elastomer, ethylene propylene rubber, ethylene-propylene-diene-methylene rubber, fluororubber, or natural rubber in order to maintain stretchability and insulation. When the conductive base material is sealed with the insulating elastic body as described above, the stretchability and the insulating property can be maintained as they are even after the repeated stretch. This stretchable elastic sheet is sealed and covered without being exposed except for the terminal when connecting to an external device or an object to be measured by the terminal of the conductive base material, so that the detection in the solution or the It is useful as a stretchable conductive wiring material that prevents the reception of noise in the detection of biological signals.

  This stretchable elastic sheet is superior to only the thin conductive layer when the flexible conductive base material has the conductive layer on the flexible support and is sealed with the rubber elastic sheet piece. It shows resilience and can quickly recover the original shape before stretching when releasing the tensile stress after stretching. Unlike conventional conductive materials that exhibit elasticity due to the expansion and contraction of the material, this elastic elastic sheet differs from elasticity due to the physical properties of the material in that only through slits / through holes or slits / cut holes are provided. It is possible to perform sealing with a rubber elastic sheet piece having a shape that does not impair conductivity and flexibility due to a three-dimensional structural change due to the slits and holes. Thereby, not only the rubber elastic sheet piece but also the characteristic derived from the three-dimensional change of the three-dimensional structure before and after the deformation is added to the mechanical characteristics at the time of deformation, and it is possible to realize a low resistance value and a high elongation rate due to a low stress. it can.

  This elastic elastic sheet can be a simple and highly stretchable wiring material because the elastic rubber sheet itself is conductive rubber and has conductivity instead of having a conductive base material. is there.

  By using this stretchable elastic sheet, it is flexible and has excellent flexibility, and it is possible to make it lighter, thinner, and smaller, and to have high conductivity inside and high insulation to the outside. The elastic conductive wiring module that exhibits excellent durability and has sufficient elasticity, does not cause a decrease in elasticity due to repeated expansion and contraction, and has excellent durability.

  These stretchable elastic sheets and stretchable conductive wiring modules using the same are provided with through slits or through holes of rubber elastic sheet pieces and slit slits or a plurality of slit holes alternately arranged, and corresponding thereto. While the slits and holes and the gaps of the conductive base material are provided alternately side by side, the inter-cut joints or the peripheral joints and the bridging neck, which are shortened in the middle of the row, make it most suitable for extension. It suppresses the expansion and contraction of the wiring ends that are prone to disconnection, making it difficult to break. By having such a structure, it has excellent resilience after repeated expansion and contraction, which cannot be achieved with a rubber elastic sheet or elastic fiber without breaks, and while sufficiently deforming with an extremely small deformation stress, the surface Alternatively, by providing the conductive base material inside, it can be applied as a stretchable wiring having excellent durability and robustness, low resistance value and high stretchability.

  This stretchable conductive wiring module using this stretchable elastic sheet as a stretchable conductive wiring material causes a specific deformation due to the three-dimensional structure of the structure particularly in a low stretch region due to an extremely small tensile stress. It can be implemented for flexible devices such as flexible substrates.

This elastic conductive wiring module is used for ultra thin film skin contact electrodes, flexible substrates,
It is useful as a stretchable wiring member suitable for a robot wiring member and the like.

  Since the stretchable conductive wiring module is sufficiently stretched even in the low stretching region even if the tensile stress is extremely small, the stretchable conductive wiring module does not make the wearer feel uncomfortable when used as a wearable device.

It is a top view which shows the use condition of the elastic elastic sheet to which this invention is applied. It is a top view which shows the use condition of another elastic sheet to which this invention is applied. FIG. 7 is a schematic perspective view showing a disassembled state of another stretchable elastic sheet to which the present invention is applied. FIG. 6 is a plan view showing a conductive base material and a rubber elastic sheet piece in a stretchable elastic sheet according to another embodiment of the present invention. It is a top view which shows the use condition of another elastic sheet to which this invention is applied. It is a figure which shows the correlation of the extension rate and tensile stress of the elastic elastic sheet to which this invention is applied, and the sheet to which this invention is not applicable. It is a figure which shows the positional relationship of the fracture | rupture place when pulling until the elastic elastic sheet to which this invention applies and the sheet | seat to which this invention is not applied are torn.

  Hereinafter, modes for carrying out the present invention will be described in detail, but the scope of the present invention is not limited to these modes.

  A preferred first embodiment of the stretchable elastic sheet 1 of the present invention is that it is composed of a long and rectangular rubber elastic sheet piece 10, as described with reference to FIG.

  The rubber elastic sheet piece 10 has a long side 10a along the longitudinal direction A and a short side 10b perpendicular thereto. The rubber elastic sheet piece 10 has a plurality of penetrating slits 13a ... 13e which are orthogonal to the longitudinal direction A which is the longitudinal direction and are arranged in series along the longitudinal direction A, and penetrating slits 13a which are adjacent in the longitudinal direction. A plurality of cutting slits 12a ... 12f which are provided alternately on the short side 10b side of the through slits 13a and 13e between both 13e and both ends and which are cut from both the long sides 10a while facing each other inwardly, Have At least one of the slits 12a ... 12f is formed closer to the center, and preferably, the closer to the central slits 12c and 12d, the longer the slits. At least one of the through slits 13a ... 13e is cut closer to the center, and the longer the slit is, the closer to the central through slit 13c.

The through slits 13a ... 13e and the cut slits 12a ... 12f are arranged at equal intervals. 13e, which are connected between the through slits 13a ... 13e and the long side 10a of the rubber elastic sheet piece 10, form a peripheral connection portion row 15 _line . The inter-cut connecting portions 14a ... 14f connected between the cut slits 12a ... 12f facing each other form a inter-cut connecting portion row 14 _line .

Thereby, among the inter-cut connecting portion rows 14 _line and the peripheral connecting portion row 15 _line , at least one of the inter-cut connecting portions 14b ... 14e and / or the peripheral connecting portion 15b ... in the middle of these rows. The lateral width of 15d in the lateral direction is smaller than the lateral width of the inter-cut connecting portions 14a and 14f and the peripheral connecting portions 15a and 15e at the row ends, respectively. Preferably, the lateral widths of the rows are sequentially reduced toward the middle of these rows, that is, toward the central inter-cut connection portions 14c and 14d and the central peripheral edge connection portion 15c. Note that, in FIG. 1, an example in which the lateral width is sequentially reduced toward the middle of the inter-cut connecting portion row 14 _line is illustrated in a somewhat exaggerated manner.

For example, in the inter-cut connecting portion row 14 _line and the peripheral connecting portion row 15 _line , the lateral widths of the inter-cut connecting portions 14b ... 14e and the peripheral connecting portions 15b. The widths of the row end cut-to-cut connecting portions 14a and 14f and the peripheral edge connecting portions 15a and 15e are sequentially reduced by 0.1 mm to 3 mm or 1% to 30%.

  The lateral width of the shortest peripheral connecting portion 15c and the inter-cut connecting portion 14d is preferably 1/50 to 1/2 of the lateral width of the rubber elastic sheet piece 10, that is, the length of the short side 10b. If it is less than this range, it is too fragile and breaks at the time of elongation. On the other hand, if it exceeds this range, the elongation rate becomes low and sufficient stretchability cannot be obtained. It is more preferably 1/10 to 1/3. The shortest lateral width of the peripheral connecting portion 15c and / or the shortest inter-cut connecting portion 14d is preferably 0.1 mm or more. If it is less than this range, it is too fragile and easily breaks when stretched. More preferably, it is 0.3 mm or more.

  This stretchable elastic sheet 1 is made of silicone rubber, silicone resin, fluororubber, ethylene-propylene-diene-methylene rubber, and / or natural rubber, which is insulative and has a flexible conductive property. It has no base material and is used for medical supporters and reinforcing / protective members for flexible devices.

  This stretchable elastic sheet 1 may be made of conductive rubber, for example, elastic rubber containing conductive particles such as conductive material, for example, carbon paste, or elastic rubber cured with a conductive rubber curing component. Good. The surface may be covered with a protective sheet.

  The stretchable elastic sheet 1 operates as follows.

The stretchable elastic sheet 1 is initially substantially flat. When the stretchable elastic sheet 1 is pulled along the longitudinal direction A with a relatively weak tensile stress so that the end 11a and the end 11b are separated from each other, the cut slits 12a ... 12f and the through slit 13a. .. and 13e are twisted to some extent and opened while tilting, and the shape changes from (a) to (b) shown in FIG. In the inter-cut connection section line 14 _line , the horizontal width of each inter-cut connection section 14a ... The inter-cut connecting portions 14a ... 14f are more easily opened toward the center of the inter-cut connecting portion row 14 _line whose width is shorter, while being less open toward the row ends. Therefore, the cut slits 12a ... 12f and the through slits 13a ... 13e are twisted more toward the center and greatly extend while tilting, and on the other hand, the slits 12a ... In this way, the stretchable elastic sheet 1 is sufficiently stretched even with a low tensile stress.

  The slits 12a ... 12f and the through slits 13a ... 13e are opened and deformed into a substantially rhombic shape or a substantially polygonal shape while being twisted unevenly, thereby contributing to the extension. On the other hand, the inter-cut connecting portions 14b ... 14e have a short width in the middle, and as a result of suppressing the expansion and contraction of the wiring end portion where disconnection is most likely to occur in actual use, the disconnection is concentrated at a specific location where disconnection easily occurs. It prevents it from breaking.

  As a result, the stretchable elastic sheet 1 is freely stretched with a slight tensile stress unless it is strongly pulled so as to tear the inter-cut joints 14b ... 14e.

  After that, when the stretchable elastic sheet 1 is stopped from being pulled and the tensile stress is released, it returns to its original shape according to the elastic force of the rubber elastic sheet piece, as shown in FIG. The slits 12a ... 12f and the through slits 13a ... 13e close while reducing the inclination while eliminating the twist. In this way, the stretchable elastic sheet 1 is restored to the shape before being stretched.

  The elastic elastic sheet 1 only deforms the shapes of the cut slits 12a ... 12f and the through slits 13a ... 13e at the time of expansion and contraction, and the repulsive force applied to the expansion / contraction motion is extremely small. Especially, in the low elongation region, almost no stress change occurs. Moreover, the stretchable elastic sheet 1 does not cause permanent deformation or damage even if it repeatedly stretches and contracts, and has excellent robustness and durability characteristics.

  A second preferred embodiment of the stretchable elastic sheet 1 of the present invention will be described with reference to FIGS. 2 and 3, which is a flexible flat plate having a flexible conductive layer 20A and a flexible support 20B. It has a conductive base material 20 and flat rectangular insulating rubber elastic sheet pieces 10 and 30 sandwiching the conductive base material 20. The rubber elastic sheet pieces 10 and 30 are as shown as the stretchable elastic body sheet 1 in FIG.

  In the conductive base material 20, the flexible support 20B made of an insulating resin and the conductive layer 20A, which is a metal layer provided thereon, have the same shape. The conductive base material 20 is in the form of a sheet that is long in the energization direction of the conductive layer 20A (that is, the longitudinal direction A).

  The conductive base material 20 has a plurality of rectangular holes 27a ... 27e penetrating through and is arranged in series along the longitudinal direction A at equal intervals. The punched holes 27a ... 27e do not initially extend in the longitudinal direction A, but penetrate such that the short sides of the rectangular shape are along the longitudinal direction A and the long sides are perpendicular to the longitudinal direction A. .. Each of the outer edges of the punched holes 27a ... 27e is a plurality of punched peripheral portions 28a ... 28e forming a part of the conductive layer 20A and the flexible support 20B. The conductive base material 20 has extraction gaps 26a ... 26f between adjacent ones of the plurality of extraction peripheral portions 28a ... 28e and on the shorter side 10b side than both ends thereof.

.. 28e adjacent to each other are connected to each other by bridging necks 25a..25f along the longitudinal direction A of the conductive base material 20 at the center in the lateral width direction. The bridging necks 25a ... 25f form a part of the conductive layer 20A and the flexible support 20B similarly to the punched peripheral edge portions 28a ... 28e, so that the conductive layers 20A can be energized. There is. The bridging necks 25a ... 25f form a bridging neck row 25 _line .

Of the bridge neck rows 25 _line, the width of at least one bridge neck 25b ... 25e in the middle of these rows is shorter than the width of the bridge necks 25a and 25f at the row ends. Preferably, in the middle of these rows, that is, as they approach the central bridging neck 25c, their lateral widths are sequentially reduced by 0.1 mm to 3 mm, or 1% to 30%.

  The shortest lateral width of the bridging neck 25c is a range that can be completely covered by the rubber elastic sheet pieces 10 and 30, and is slightly shorter than the range shown by the cut connection portion 14d by the margin. The shortest lateral width of the bridging neck 25c is preferably a ratio of 1/120 to 1/3 to the lateral width of the rubber elastic sheet piece 10, that is, the length of the short side 10b, or 0.1 mm to 4 mm. Below this range, the resistance value becomes too large. On the other hand, if it exceeds this range, sufficient extensibility cannot be obtained. More preferably, the ratio is 1/60 to 1/5, or the width is 0.2 mm to 2 mm.

  The rubber elastic sheet pieces 10 and 30 have the same length as the conductive base material 20 in the longitudinal direction A, and are longer than the conductive base material 20 in the direction perpendicular to the longitudinal direction A so as to wrap the conductive base material 20. It has a margin. 28e are sealed and covered with the rubber elastic sheet pieces 10 and 30 so as not to be exposed to the outside together with the bridging necks 25a to 25f.

  The rubber elastic sheet pieces 10 and 30 each have a through slit 13a ... which is smaller than the punching holes 27a ... 27e in accordance with the positions of the punching holes 27a ... 27e in the punching peripheral portions 28a ... 28e. 13e and 33a ... 33e penetrate respectively. The rubber elastic sheet pieces 10 and 30 have the through slits 13a ... 13e and 33a ... 33e smaller than the punched holes 27a ... 27e. 28e is sealed and adhered so as to wrap around the margins 28a ... 28e that are joined together at their margins, so that the margins 28a ... 28e are not exposed to the outside. ing.

  In addition, the rubber elastic sheet pieces 10 and 30 each have a slit slit 12a smaller than the extraction gaps 26a ... 26f in accordance with the positions of the extraction gaps 26a ... 26f between the extraction peripheral portions 28a ... 28e. ... 12f and 32a ... 32f penetrate respectively. The cut slits 12a ... 12f and 32a ... 32f are directed inward from the long sides 10a on both sides so as to be orthogonal to the longitudinal direction A of the rubber elastic sheet pieces 10/30, while the bridge neck 25a ... It is cut so that it does not reach 25f. The rubber elastic sheet pieces 10 and 30 have the cut slits 12a ... 12f and 32a ... 32f smaller than the extraction gaps 26a ... 26f, so that the cut slits 12a ... 12f and 32a. 28e is formed by sealing and adhering the peripheral edge portions of 32f so as to wrap around the peripheral edge portions 28a ... 28e with their margins joined to each other, so that the peripheral edge portions 28a ... 28e and the bridging neck 25b ...・ 25e is not exposed to the outside world.

  This stretchable elastic sheet 1 includes cut slits 12a ... 12f and through slits 13a ... 13e of the rubber elastic sheet piece 10 and cut slits 32a ... 32f and through slits of the rubber elastic sheet piece 30. 26e through 33a ... 33e through the extraction gaps 26a ... 26f between the extraction peripheral edge portions 28a ... 28e of the conductive base material 20 and the extraction holes 27a ... 27e in the extraction peripheral edge portions 28a ... 28e. They overlap each other, and the margins there are glued together. As a result, the punched peripheral portions 28a ... 28e can be opened / closed from a rectangular shape to a rhombic shape, and the punching gaps 26a ... 26f can be separated from each other, so that the stretchable elastic sheet is formed. 1 is expandable and contractible.

  Since the elastic elastic sheet 1 is covered with the insulating rubber elastic sheet pieces 10 and 30 on the front surface side and the back surface side, the edge on the short side 10b side is completely sealed. Although it may be covered so as not to be exposed, the edges of the ends 21a and 21b at both ends in the longitudinal direction A may be exposed so that it can be connected to an external device as necessary.

  The stretchable elastic sheet 1 operates as follows.

The stretchable elastic sheet 1 is initially substantially flat according to the flat conductive base material 20 and the flat rubber elastic sheet pieces 10 and 30. When the stretchable elastic sheet 1 is pulled along the longitudinal direction A with a relatively weak tensile stress so that the end portions 11a, 21a, 31a and the end portions 11b, 21b, 31b are separated from each other, it is shown in FIG. The shape changes from a) to (b). The cut between the connection portion array 14 _line with the crosslinking neck column 25 _line, the horizontal width of the cutout between the connecting portions 14a · · · 14f each crosslinking neck 25a · · · 25f becomes successively shorter as the middle. 14f and the bridging necks 25a ... 25f are easier to open toward the center of the inter-cutting joint row 14 _line and the bridging neck row 25 _line whose lateral width is shorter. It's harder to open near the end of the line. Therefore, the notch slits 12a ... 12f and 32a ... 32f and the through slits 13a ... 13e and 33a ... 33e are twisted and tilted more toward the center with respect to each of the extraction peripheral edge portions 28a ... 28e. However, it stretches a little, and on the other hand, it twists less toward the edges and stretches slightly while tilting. In this way, the stretchable elastic sheet 1 is sufficiently stretched even with a low tensile stress.

  28E, the short sides (parallel to the longitudinal direction A) of the drawn peripheral edge portions 28a ... 28e respectively do not extend so much against the tensile stress and are twisted to a certain extent. The long sides (perpendicular to the longitudinal direction A) of the punched peripheral portions 28a ... 28e cannot resist the tensile stress and are curved or bent, and are largely twisted. Also, the slit slits 12a ... 12f and 32a ... 32f are opened accordingly. At this time, the gap slits 12a ... 12f and 32a ... 32f are cut from both sides, but since the bridge necks 25a ... 25f are not reached, the vicinity of the bridge necks 25a ... 25f is not twisted so much. Open while leaning. Accordingly, the conductive base material 20 and the rubber elastic sheet pieces 10 and 30 attached to the conductive base material 20 are similarly stretched while being twisted, and as a result, the elastic elastic sheet 1 is stretched. At this time, the insides of the punching peripheral edge portions 28a ... 28e are opened in the longitudinal direction and the short sides inside the bridging necks 25a ... 25f and the punching peripheral edge portions 28a ... 28e are changed from the rectangular shape of the punching holes 27a ... 27e. By deforming into a twisted substantially rhombic shape or a substantially polygonal shape having and as corners, it contributes to the elongation. On the other hand, since the bridging necks 25a ... 25f cannot extend and are not twisted, they do not contribute to the extension but rather prevent the punched peripheral edge portions 28a ... 28e from being excessively deformed or insufficiently deformed. However, the inter-cut joints 14b ... 14e and 34b ... 34f and the bridging necks 25b ... 25e have short lateral widths in the middle, and therefore, they are twisted unevenly and extend while tilting. Thus, in practical use, expansion and contraction of the wiring end portion where disconnection is most likely to occur is prevented, and breakage is prevented.

  As a result, the elastic elastic sheet 1 is freely stretched unless the conductive base material 20 is comparatively hard to be broken by tensile stress, unless it is pulled too strongly.

  After that, when the stretchable elastic sheet 1 stops being pulled and the tensile stress is released, the stretchable elastic sheet 1 returns to its original shape according to the elastic force of the rubber elastic sheet pieces 10 and 30, as shown in FIG. 28e and 28e ... and the slits 12a ... 12f and 32a ... 32f close while reducing the inclination while eliminating the twist. At that time, the short side portions of the punched peripheral edge portions 28a ... 28e are neither stretched nor contracted, but the twist is eliminated, and the long side portions of the punched peripheral edge portions 28a ... The slits 12a ... 12f and 32a ... 32f are re-deformed so that the tensile stress is released and the bending or bending thereof returns to the original state. Accordingly, the stretchable elastic sheet 1 shrinks to its original shape while eliminating the twist and inclination between the conductive base material 20 and the rubber elastic sheet pieces 10 and 30. At this time, the insides of the extracted peripheral edge portions 28a ... 28e and the gap slits 12a ... 12f and 32a ... 32f contribute to closing and contracting along the longitudinal direction A. On the other hand, since the bridging necks 25a ... 25f do not contract, they do not contribute to the expansion and contraction, but rather help to restore the original shape of the punched peripheral portions 28a ... 28e. In this way, the stretchable elastic sheet 1 is restored to the shape before being stretched.

  When the elastic elastic sheet 1 is expanded or contracted, the cut slits 12a ... 12f and 32a ... 32f and the through slits 13a ... 13e and 33a ... 33e of the rubber elastic sheet pieces 10/30 are expanded and contracted. And the holes 27a ... 27e of the conductive base material 20 are only deformed, and the conductive base material 20 is sealed by the rubber elastic sheet pieces 10 and 30, so that the tensile stress applied to the expansion and contraction motion is reduced. It can be extremely small. Especially, in the low elongation region, almost no stress change occurs. Moreover, the stretchable elastic sheet 1 does not cause permanent deformation or damage due to changes in the shapes of the rubber elastic sheet pieces 10 and 30 and the conductive base material 20 even when repeatedly stretched and stretched, and is not only excellent in robustness and durability characteristics. In addition, the resistance value of the conductive base material 20 hardly changes, and the conductive property is excellent.

  Since this elastic elastic sheet 1 is securely sealed by the rubber elastic sheet pieces 10 and 30 except for the edges of the ends of the conductive base material 20 that can serve as terminals, it does not cause any unexpected leakage or discharge. , Excellent in electrical characteristics.

  This stretchable elastic sheet 1 includes a through slit 13, a through hole, a cut slit 12, and a cut hole of the rubber elastic sheet pieces 10 and 30 and a bridging neck 25, a pulling gap 26, a pulling slit, and a pulling hole as necessary. By having the hole 27 and the punched peripheral region 28, the tensile stress at the time of 50% elongation deformation can be set to 1 MPa or less, preferably 0.5 MPa or less, and more preferably 0.3 MPa or less.

  The stretchable elastic sheet 1 shows a shape change of 10% or less when 50% elongation deformation is repeated 1,000,000 times, and is excellent in restorability and robustness.

  The elastic elastic sheet 1 has been described with the shapes shown in FIGS. 1 to 3, but the shape of each structure can be any shape.

  The stretchable elastic sheet 1 may not be flat in the initial state, and may be curved, bent, or spiral.

  In the stretchable elastic sheet 1, as shown in FIG. 4A, the punched hole 27, the punched peripheral edge portion 28, and the bridging neck 25 of the conductive base material 20 may be rounded at the corners of their inner circumferences. It may be rounded at the connection angle between the extraction peripheral portion 28 and the bridging neck 25. Further, the through holes and the cut holes (not shown) of the rubber elastic sheet pieces 10 and 30 may be rounded at the corners.

  As shown in FIG. 4 (b), the elastic elastic sheet 1 has a slit 27 (see FIG. 3) of the conductive base material 20, a penetrating slit 13/33 and a slit 12 of the rubber elastic sheet piece 10/30. 32 (see FIG. 3) may have a through hole 29 at the end.

  The stretchable elastic sheet 1 has a shape in which the shape of the punched peripheral edge portion 28 of the conductive base material 20 is changed to a rectangular shape, such as a square shape, an upright rectangular shape, a rhombic shape, a hexagonal shape, or an isosceles trapezoidal shape. It may have a polygonal shape, an elliptical shape, a curved diamond shape, a rounded rectangular shape, or a combination thereof. Along with the bridging neck 25, a bellows shape or a zigzag shape may be used.

  For example, as shown in FIG. 5, when the shape of the peripheral edge portion 28 of the conductive base material 20 is formed into a bellows shape, the conductive base material 20 has a hole 27 between the end 21 a and the end 21 b. A punched peripheral edge portion 28 punched out and formed around the punched peripheral edge portion 28 and a curved bridging neck 25 formed on the outer side which is the long side 10a side of the rubber elastic sheet piece 10 connecting the peripheral edge portion 28 are repeatedly formed. A drawing gap 26 is formed between the adjacent drawing peripheral edge portions 28 and the bridging neck 25. Similar to FIGS. 1 to 3, it is covered and covered with insulating rubber elastic sheet pieces 10 and 30. The rubber elastic sheet pieces 10 and 30, which are rounded to match the outer circumference of the curved bridging neck 25, penetrate through the through slit 13 that is smaller than the punched hole 27 in accordance with the punched peripheral region 28. The rubber elastic sheet pieces 10 and 30 are pierced by the cut slits 12 which are smaller than the drawing gap 26 in accordance with the drawing gap 26. In the rows of the bridging necks 25, the lateral widths of the bridging necks 25 become shorter in the middle of the row. Along with that, in the middle of the row of the peripheral connecting portion rows made up of a plurality of peripheral connecting portions 15 connected between the through slits 13 of the rubber elastic sheet pieces 10/30 and the long sides 10a of the rubber elastic sheet pieces 10/30. The lateral width of the peripheral edge connecting portion 15 becomes smaller. The conductive base materials 20 are symmetrically paired.

  In the stretchable elastic sheet 1 according to still another aspect, the punched hole 27 of the conductive base material 20 may be a thick and long hole, and the through slits 13 and 33 of the rubber elastic sheet pieces 10 and 30 may be thin and short holes. The slit may be narrow and well thin. The punched hole 27 of the conductive base material 20 may be a thick and long slit, and the through slits 13 and 33 of the rubber elastic sheet pieces 10 and 30 may be thin and short slits.

  In the stretchable elastic sheet 1 according to still another aspect, the conductive base material 20 has a conductive layer 20A which is a metal layer attached to a part of the flexible support 20B formed of an insulating resin. It may be one.

  The stretchable elastic sheet 1 according to another embodiment may be symmetric or asymmetric.

  The stretchable elastic sheet 1 has a conductive layer so that the resistance value when not covering the rubber elastic sheet pieces 10 and 30 is 1 kΩ at maximum, preferably 0.2 kΩ at maximum, and more preferably 0.1 kΩ. It is preferable to appropriately select 20A or adjust the thickness of the conductive layer 20A. The stretchable elastic sheet 1 having such a resistance value can be adjusted by the conductive layer 20A which is homogeneous and has almost no cracks.

  The stretchable elastic sheet 1 is a metal film layer made of a metal or alloy such as copper, silver, or gold if the conductive layer 20A in the conductive base material 20 is flexible and made of a conductive material. A conductive inorganic substance-containing conductive film layer such as a carbon paste-containing conductive layer film, an organic conductive film layer made of an organic conductor or an organic conductive ink can be arbitrarily selected. Above all, the conductive layer 20A is preferably made of copper, silver, and gold, which have low resistance and high elongation. The conductive layer 20A can be arbitrarily set to have a thickness of 1 nm to 1 mm. If it is less than this range, it becomes difficult to form the conductive layer 20A into a uniform layer and the conductivity is deteriorated. On the other hand, if it exceeds this range, it becomes too thick and it becomes difficult to maintain flexibility. The lower limit is more preferably 10 nm and even more preferably 100 nm. The upper limit is more preferably 0.5 mm and even more preferably 0.1 mm.

  In the conductive base material 20, the conductive layer 20A is attached to the flexible support 20B by printing, etching, sputtering, sticking or the like.

  The stretchable elastic sheet 1 is made of a general-purpose plastic exemplified by polypropylene, polystyrene, and polyethylene terephthalate if the flexible support 20B in the conductive base material 20 is a flexible and elastic one made of an insulating material. Polycarbonate, polyacetal, engineered plastic exemplified by polyamide, polyimide, polyether ether ketone, super engineered plastic exemplified by polyphenylene sulfide, etc. can be arbitrarily selected, among them, polyimide, polyethylene terephthalate, polycarbonate, polyphenylene It is preferably made of sulfide or the like. The flexible support 20B can be arbitrarily set to have a thickness of 1 μm to 1 mm. Below this range, it becomes difficult to maintain insulation and supportability. If it exceeds this range, it becomes difficult to maintain flexibility. The lower limit is more preferably 10 μm and even more preferably 50 μm. The upper limit is more preferably 0.5 mm, and even more preferably 0.2 mm.

  If the elastic elastic sheet 1 does not have the flexible support 20B, the elastic elastic sheet pieces 10 and 30 are insufficient in restoring force and are difficult to sufficiently expand and contract.

  The stretchable elastic sheet 1 is made of silicone such as polydimethylsiloxane, polydiphenylpolysiloxane, and polyfluorosiloxane as long as the rubber elastic sheet pieces 10 and 30 are made of an insulating material and can be covered with flexibility. Made of resin or silicone rubber, soft polyurethane, polyurethane such as hard polyurethane, plastic elastomer such as polystyrene, ethylene propylene rubber such as ethylene propylene diene rubber, vinylidene fluoride, tetrafluoroethylene-propylene, tetrafluoro Fluorine rubber such as ethylene-purple oro vinyl ether, natural rubber, etc. can be arbitrarily selected, but among them, silicone rubber or silicone resin having excellent insulation and processability is more preferable. The rubber elastic sheet pieces 10 and 30 can be arbitrarily set to have a thickness of 10 μm to 10 mm. Below this range, it becomes difficult to maintain durability and insulation. If it exceeds the range, it is difficult to maintain flexibility, or if it is not pulled forcibly, it becomes difficult to extend and the stretchability becomes poor. The lower limit is preferably 10 μm, and more preferably 20 μm. The upper limit is preferably 5 mm, more preferably 1 mm, and even more preferably 200 μm.

  In the stretchable elastic sheet 1, the hardness of the rubber elastic sheet pieces 10 and 30 can be arbitrarily selected within a range of 10 to 90 in Shore A hardness. Above all, the Shore A hardness having good strength and extensibility is more preferably 10 to 50.

  The stretchable elastic sheet 1 is arranged in a line in the longitudinal direction in the conductive base material 20 such that the punching peripheral portions 28 penetrating with the punching holes 27 and the punching slits are connected by the bridging neck 25 while leaving the pulling gap 26. Meanwhile, a plurality of rows thereof are arranged side by side, and the rubber elastic sheet pieces 10 and 30 have through-slits smaller than the punching holes 27 and the punching slits in accordance with the positions of the punching holes 27 and the punching slits and the punching gap 26. The gap slits 12 and 32, which are smaller than the gaps 13 and 33 and the extraction gap 26, may pass through, respectively.

  In the stretchable elastic sheet 1, the conductive base material 20 and the rubber elastic sheet pieces 10 and 30 may be bonded by an adhesive agent, may be heat-welded, or may be bonded by a chemical bond. , May be integrally formed.

  The elastic elastic sheet 1 has an end portion 21 of the conductive layer 20A sealed by the end portions 11a and 11b of the rubber elastic sheet pieces 10 and 30 and an electrical connection connector, for example, a ring snap terminal for connection with an external device. It may have a cable clamp terminal.

  The elastic elastic sheet 1 may serve as a terminal because the other end 21b of the conductive layer 20A is exposed from at least one end 11b or 31b of the rubber elastic sheet piece 10 or 30. In addition, the end 21b may be bifurcated.

  The stretchable elastic sheet 1 is covered with the conductive base material 20 by sandwiching the conductive base material 20 and sealing the peripheral edge portion 28 of the conductive base material 20 and the bridging neck 25 with the rubber elastic sheet pieces 10 and 30 without exposing them. By doing so, it is the minimum unit of three layers. You may make it the multilayered structure which laminated | stacked the several minimum unit.

  The stretchable elastic sheet 1 may have a multi-layer structure in which the rubber elastic sheet pieces 10 and the conductive base material 20 are alternately stacked and further sealed with 30 and covered.

  The stretchable elastic sheet 1 can be used as one of a pair of electrodes for detecting a biological signal.

  In the stretchable elastic sheet 1, the conductive base material 20 has the entire end portions 21a and 21b at one end side in the longitudinal direction, and the entire end portions 21a and 21b at one end side in the longitudinal direction of the rubber elastic sheet pieces 10 and 30. It may be completely sealed with 11b and covered so as not to be exposed. The conductive layer 20A is connected to an electrical connection connector for connecting to an external device at the end 21a or 21b.

  A plurality of stretchable elastic sheets 1 can be overlapped and integrated to form a stretchable conductive wiring module. When a plurality of stretchable elastic sheets 1 are stacked, the lower elastic rubber sheet piece 30 of the upper stretchable elastic sheet and the upper rubber elastic sheet piece 10 of the lower stretchable elastic sheet are used together. Good. By doing so, the stretchable elastic sheet 1 is made into a five-layer structure of a rubber elastic sheet piece, a conductive base material, a rubber elastic sheet piece, a conductive base material, and a rubber elastic sheet piece, and two elastic base materials are used as a pair. Alternatively, the rubber elastic sheet piece and the conductive base material may be stacked in this order to form a nine-layer structure, and four conductive base materials may form two pairs of electrodes. A plurality of stretchable elastic sheets may be overlapped and integrated.

  In the elastic conductive wiring module, each of the plurality of elastic elastic sheets may be a terminal at a terminal, and the terminal may be connected to an external terminal.

  In the stretchable elastic sheet 1 and the stretchable conductive wiring module using the stretchable elastic sheet 1, even when the sealing portion is immersed in the electrolyte solution, the electrolyte solution does not exude to the conductive base material 20 and does not infiltrate.

  Such a stretchable elastic sheet 1 and a stretchable conductive wiring module can detect a signal of 1 Hz to 100 kHz. Usually, the biological signal is several Hz to several kHz, and especially about 100 Hz in the case of myoelectric signal, so that it can be sufficiently detected by the elastic elastic sheet 1 and the elastic conductive wiring module.

  The stretchable elastic sheet 1 and the stretchable conductive wiring module are manufactured as follows, for example.

  First, the conductive base material 20 is manufactured. The conductive base material 20 was prepared by preparing Cu sputtered polyimide by depositing a copper film on a polyimide film by sputtering, and then punching it out as shown in FIGS. 2 and 3 to form a hole in the middle of the long conductive base material 20. 27, a punching gap 26 therebetween, a punching peripheral portion 28 necessarily formed by them, and a bridging neck 25 connecting the punching holes 27 are formed to obtain the conductive base material 20.

  Next, the rubber elastic sheet pieces 10 and 30 are produced. The silicone rubber sheet is cut into a size larger than the outer shape of the conductive base material 20 by the amount of the margin, and the through slits 13 and 33 smaller than the punch hole 27 are formed in accordance with the position of the punch hole 27 in the punch peripheral portion 28. The rubber elastic sheet pieces 10 and 30 are obtained by cutting the gap slits 12 and 32 smaller than the pulling gap 26 in accordance with the positions of the pulling gaps 26 between the pulling peripheral portions 28.

  Finally, the punching hole 27 and the through slits 13 and 33 are aligned with each other, and while the drafting gap 26 and the gap slits 12 and 32 are aligned with each other, the punching peripheral portion 28 is sealed and adhered by a margin. The conductive base material 20 and the rubber elastic sheet pieces 10 and 30 are overlapped and covered with an adhesive so as to cover the elastic elastic sheet 1.

  Instead of using Cu sputtered polyimide as the conductive base material 20, a flexible support provided with a copper film may be formed by etching. A carbon paste-containing conductive ink is applied to a flexible support having the voids 26, the holes 27, and the bridge neck 25 to form a conductive inorganic substance-containing conductive film layer such as a conductive ink layer film. The organic conductive ink may be applied to form the organic conductive film layer.

  As another manufacturing method, a rubber elastic sheet piece 10 or 30 of a small silicone rubber sheet piece is attached to the conductive base material 20 in which the punched hole 27, the punching gap 26, and the cross-linking neck 25 are formed, and then the punching is performed. The slit slits 12 are smaller than the punching gap 26 in accordance with the positions of the punching holes 27 in the peripheral edge portion 28 and the through slits 13 and 33 which are smaller than the punching hole 27 and the punching gap 26 between the punching peripheral portion 28. 32 may be cut into each other to obtain the stretchable elastic body sheet 1.

  As still another manufacturing method, a silicone rubber sheet piece to be the rubber elastic sheet piece 10 or 30 is bonded with an adhesive to any one surface of the conductive base material 20 in which the punched hole 27, the punched gap 26, and the bridge neck 25 are formed. Then, the cured resin component composition of silicone rubber is applied to, sprayed on, and dipped on the other surface of the conductive base material 20 to form the other rubber elastic sheet piece 30 or 10, and then the peripheral edge of the extraction is performed in the same manner as described above. Even if the stretchable elastic sheet 1 is obtained by cutting the through slits 13 and 33 according to the position of the hole 27 in the part 28 and the gap slits 12 and 32 according to the position of the drawing gap 26. Good.

  As still another manufacturing method, a cured rubber component composition of silicone rubber is applied, sprayed and dipped on both surfaces of the conductive base material 20 in which the punched hole 27, the punched gap 26, and the cross-linked neck 25 are formed, and a rubber elastic sheet piece is formed. After forming 10 and 30 all at once, the through slits 13 and 33 and the gap slits 12 and 32 according to the position of the punching gap 26 are formed in the same manner as described above according to the position of the punching hole 27 in the punching peripheral region 28. The elastic elastic sheet 1 may be obtained by cutting.

  If necessary, the formation of the laminated structure of the elastic elastic sheet 1 is repeated to form an elastic conductive wiring module. In the stretchable conductive wiring module, an electrical connection connector is attached to the end portion 21a of the conductive layer 20A, if necessary. The electrical connector may be attached by soldering or may be attached by screwing in a ring snap terminal and caulking.

  The stretchable conductive wiring module can be used as a detachable, disposable and clean wearable device by stacking stretchable elastic sheets 1 in multiple layers and / or arranging them in series and / or in parallel. The elastic conductive wiring module can be widely used for measuring myoelectric potential of small muscles such as facial muscles, palm muscles, and large leg muscles. The stretchable conductive wiring module can be used as 1 to 4 pairs of electrodes and 1 to 4 pairs of 2 to 8 electrodes to measure myoelectric potentials and various three-dimensional myoelectric potentials in various parts of a living muscle.

  The elastic conductive wiring module is used for measuring a myoelectric potential in rehabilitation to inspect a recovery state, inspecting a degree of progress of a muscle disease called myopathy, and in examining an athlete's exercise ability. Further, it can be used to accurately measure the myoelectric potential by following the movement of the muscle, such as recording the movement of the craftsman as a change in myoelectric potential and leaving the skill of the craftsman as technical data in posterity.

  This expandable conductive wiring module not only can detect the desired potential without detecting unnecessary noise while arranging the exposed terminals only in the necessary places and sealing the other parts to keep the insulation. The electric characteristics can be maintained even after repeated expansion and contraction.

  An example in which a stretchable elastic sheet to which the present invention is applied and a stretchable elastic sheet to which the present invention is not applied are produced and their performances are compared is shown below.

  First, Example 1 in which the present invention is applied to produce a stretchable elastic sheet 1 consisting only of the rubber elastic sheet piece 10 shown in FIG. 1, and Comparative Examples 1 and 2 in which sheets to which the present invention is not applied are produced. The performances of and were compared.

(Example 1)
The silicone rubber raw material composition, LSR2660 manufactured by Momentive Co., was sheeted using a calender roll and heat-cured to form a silicone rubber sheet with a thickness of 60 μm. A raw material for a flexible elastic sheet was prepared. As shown schematically in FIG. 1, the number of slits and the width of the slits are six pairs of slits 12a ... 12f and six slits between the slits 14a ... 14f. It has an inter-connecting portion row 14 _line and a peripheral connecting portion row 15 _line consisting of five through slits 13a ... 13e and peripheral edge connecting portions 15a ... 15e from one end to the long side 10a. , The longitudinal direction A and its vertical direction serve as a contrast. One slit of each pair of slits 12a and 12f closest to both short sides 10b is cut by 3 mm, and each time the slits 12a and 12f are displaced inward, one slit of each pair is cut to reach the intermediate slit 12c. The slits are successively cut by 1 mm, and are spaced by 4 mm. As a result, the lateral width of the inter-cut connecting portions 14a and 14f at the end of the inter-cut connecting portion row 14 _line is 6 mm, and the horizontal width of the inter-cut connecting portions 14c and 14d at the center of the row is 2 mm. There is. The width of the through slit 13a is 3 mm, 13b is 4 mm, 13c is 5 mm, 13d is 4 mm, and 13e is 3 mm at equal intervals in the middle of the inter-cut connecting portions 14a ... 14f of the inter-cut connecting portion row 14 _line. It is cut by and penetrates. The widths of the peripheral edge connecting portions 15a ... 15e formed by the slit ends of the through slits 13a ... 13e and both long sides 10a are 4.5 mm for 15a, 4 mm for 15b, 2.5 mm for 15c, and 15d. Is 4 mm and 15e is 4.5 mm. This was used as a sample of the gradation-cut paper structure of Example 1.

(Comparative Example 1)
A stretchable elastic sheet raw material having a thickness of 60 μm, a long side 10a of 41 mm, and a short side 10b of 12 mm formed in the same manner as in Example 1 was used as it was as a sample having a non-cut paper structure in Comparative Example 1. ..

(Comparative example 2)
Instead of applying gradation to the lateral widths of the through slit 13 and the inter-cut connecting portion 14 as in Example 1, except that the lateral width of the through slit 13 and the inter-cut connecting portion 14 in the middle is set to 4 mm. In the same manner as in Example 1, the sample of Comparative Example 2 having a non-gradation-cut paper structure was used.

(Tensile test 1)
Each sample of Example 1 and Comparative Example 1 was pulled by a tensile tester at 10 mm / min to prepare a stress-strain curve until the sample was torn. The results are shown in FIG. 6 and Table 1.

  As is clear from FIG. 6 and Table 1, the sample of Example 1 having a gradation-cut paper structure is compared with the samples of Comparative Example 1 having a non-cut paper structure and Comparative Example 2 having a non-gradation-cut paper structure. It was found that the elongation rate was greatly improved and the stress required for deformation was reduced.

  2 and 3 to which the present invention is applied, a conductive material sputtered with copper on a polyimide film is processed into a shape having a plurality of opening structures, and is bonded with slit-processed silicone rubber to insulate and seal. About Example 2 in which the stretchable elastic sheet 1 including the rubber elastic sheet pieces 10 and 30 and the conductive base material 20 was manufactured, and Comparative Examples 3 and 4 in which the sheets to which the present invention was not applied were manufactured. , And compared their performance.

(Example 2)
As shown schematically in FIG. 2 and FIG. 3, the number and width of the elastic elastic sheets 10 and 30 made of silicone rubber and having a thickness of 30 μm in the longitudinal direction have a long side of 42 mm and a short side of 12 mm. Is. The stretchable elastic sheets 10 and 30 are the same as those manufactured in Example 1, and the cut slits 12a ... 12f. 32a .. 32f and the through slits 13a .. 13e. 33a. 33e and the inter-cut joints 14a ... 14f, 34a ... 34f.
The conductive base material 20 used was REMI-FS manufactured by Kitagawa Kogyo.
The conductive base material 20 has a minimum wiring width of 0.75 mm at the punching peripheral edge portion 28, a lateral width of the punching hole 27 of 8 mm, and the punching gaps 26a ... 26f between the punching peripheral edge portions 28 in the longitudinal direction A. The width of the bridge necks 25a and 25f at the row ends of the bridge neck row 25 _line is 1. The length is 8 mm, and the length gradually decreases by 0.4 mm until the bridge neck 25c in the middle is reached.
The conductive substrate 20 and the stretchable elastic sheets 10 and 30 thus obtained are respectively processed, and then a silicone adhesive (trade name: Super X Gold; made by Cemedine Co., Ltd.) is thinly applied to the conductive substrate 20 to expand and contract. The elastic elastic sheets 10 and 30 were sandwiched and adhered. The stretchable elastic sheets 10 and 30 were provided with a margin of 1 mm each, and a sample of stretchable elastic sheet 1 having a gradation-cut paper structure and conductivity was obtained.

(Comparative example 3)
A stretchable elastic sheet 10/30 having a thickness of 30 μm, a long side 10a of 42 mm, and a short side 10b of 12 mm as in Example 2 is used, and instead of the conductive base material 20 in Example 2, a cross-linked neck 25a. .. 25f, the drawing gaps 26a ... 26f, and the drawing peripheral parts 28a ... 28e are the same as the bridging neck 25c, the drawing gap 26d, and the drawing peripheral part 28c, except that the gradation is eliminated. In the same manner as above, a sample of a sheet having a non-gradation-cut paper structure and having conductivity was obtained.

(Tensile test 1 and tensile test 2)
In the same manner as in the tensile test 1, a tensile test was performed on the elongation rate, the maximum tensile strength, and the tensile stress for elongation to 50%. Further, as shown in FIG. 7, a tensile test 2 for measuring the location of the fractured portion and the number of fractured samples at that location for Example 2 (FIG. 7A) and Comparative Example 3 (FIG. 7B) I went. The results are summarized in Table 2.

(Resistance measurement test)
The results of measuring the resistance values are summarized in Table 2.

  As is clear from Table 2, the sample of Example 2 having the gradation-cut paper structure maintains the maximum tensile strength and the tensile stress for stretching to 50% of the elongation rate as compared with the sample of Comparative Example 3 having the non-cut paper structure. And the extension rate improved. The resistance value was also improved because the area of the conductive film 20 was large. In addition, in the breaking point, in Example 2 to which the present invention is applied, the shortest bridging neck portion is exclusively torn, whereas in Comparative Example 3 to which the present invention is not applied, the breaking position has no selectivity / specificity. Do you get it.

  As described above, the stretchable elastic sheet and the stretchable conductive wiring module to which the present invention is applied can be confirmed to be able to be stretched and deformed with a low stress, to exhibit a high shape recovery property, and to have excellent conductivity. Was confirmed.

  This stretchable elastic sheet has flexibility and sufficient stretchability, does not cause a decrease in stretchability due to repeated stretches, and has excellent durability. Therefore, stretchable elastic sheets, medical supporters, etc. It is useful as a stretchable base material.

  Further, when the elastic elastic sheet has a conductive base material or is formed of conductive rubber, it exhibits excellent conductivity while having elasticity, so that the wiring of the elastic conductive wiring module It is useful as a material.

  This elastic conductive wiring module is used for wearable devices and flexible devices such as flexible substrates that require elastic wiring, robots, and the like.

1 is a stretchable elastic sheet, 10 is a rubber elastic sheet piece, 10a is a long side, 10b is a short side, 11a and 11b are end portions, 12 and 12a ... 12f are notch slits, 13 and 13a ... 13e is a through slit, 14 * 14a ... 14f is a connection part between cuts, 14 _line is a connection part sequence between cuts, 15 * 15a ... 15e is a peripheral connection part, 15 _line is a peripheral connection part line, 20 Is a conductive base material, 20A is a flexible conductive layer, 20B is a flexible support, 21a and 21b are end portions, 25.25a ... 25f is a bridge neck, 25 _line is a bridge neck row, 26.26a. .. 26f is a removal gap, 27.27a ... 27e is a removal hole, 28.28a ... 28e is a removal peripheral portion, 29 is a through hole, 30 is a rubber elastic sheet piece, 31a and 31b are end portions, 32・ 32a ・ ・ ・ 32f are slit slits, 33.3 a · · · 33e is through slit, 34 · 34a ··· 34f is cut between the connection unit, 34 _line is cut between coupling part row, A is the longitudinal direction.

Claims (21)

A plurality of through slits and / or a plurality of through holes arranged in series and / or in parallel while intersecting with the longitudinal direction of the rectangular rubber elastic sheet piece;
A peripheral connecting portion row composed of a plurality of peripheral connecting portions connected between the through slit and / or the through hole and the long side of the rubber elastic sheet piece,
A plurality of slits and / or a plurality of slits that are provided alternately with the plurality of through slits and / or the plurality of through holes, and are cut from both the long sides of the rubber elastic sheet piece while facing each other inwardly. With a hole
An inter-cutting connecting portion row composed of a plurality of inter-cutting connecting portions connected between the cutting slits and / or the cutting holes facing each other,
A stretchable elastic sheet having,
Of the peripheral edge connecting portion row and the inter-cut connecting portion row, the lateral width of at least one of the peripheral edge connecting portions and / or the inter-cut edge connecting portions in the middle of these rows is the peripheral edge connecting portion at each row end. And / or the stretchable elastic sheet is shorter than the lateral width of the inter-cutting connection portion.   The lateral widths of the peripheral edge connecting portion and / or the inter-cutting connecting portion are sequentially reduced toward the middle of the peripheral edge connecting portion row and the inter-cutting connecting portion row. Item 2. The stretchable elastic sheet according to item 1.   The lateral width of the shortest peripheral connecting portion and / or the inter-cut connecting portion of the peripheral connecting portion row and the inter-cut connecting portion row is 1/50 to 1 of the horizontal width of the rubber elastic sheet piece. / 2, The elastic elastic sheet according to any one of claims 1 to 2.   The shortest lateral width of the peripheral connecting portion and / or the horizontal width of the inter-cut connecting portion among the peripheral connecting portion row and the inter-cut connecting portion row is at least 0.1 mm, respectively. The stretchable elastic sheet according to claim 1. The through slit or the slit slit has a through hole at each end, and / or the through hole or the slit hole is rounded at each corner. The stretchable elastic sheet according to any one of 1 to 4.   The rubber elastic sheet piece is made of silicone rubber, silicone resin, polyurethane, plastic elastomer, ethylene propylene rubber, ethylene-propylene-diene-methylene rubber, fluororubber, and / or natural rubber. The stretchable elastic sheet according to any one of claims 1 to 5. A flexible conductive base material having a conductive layer bridges a plurality of punched peripheral portions penetrating with punch slits and / or punch holes arranged in series and / or in parallel along the current-carrying direction of the conductive layer so as to be able to conduct current, respectively. Having while connecting with the neck, is covered and covered with the rubber elastic sheet piece without exposing at least a part of the conductive base material,
Of the bridge neck row consisting of a plurality of the bridge neck, the width of at least one bridge neck in the middle of the row is shorter than the width of the bridge neck at the row end,
The insulative rubber elastic sheet piece, in accordance with the extraction peripheral region, is penetrated by the through hole and / or the through hole smaller than the extraction hole and the extraction slit,
The conductive base material has a clearance between each of the plurality of peripheral areas, and the rubber elastic sheet piece is adjusted to the clearance so that the slit and / or the slit is smaller than the clearance. The elastic elastic sheet according to any one of claims 1 to 6, wherein the elastic elastic sheet penetrates through the cut holes.   The stretchable elastic sheet according to claim 7, wherein the lateral width of the bridging neck is gradually reduced toward the middle of the bridging neck row.   9. The stretchable elastic sheet according to claim 7, wherein both sides of the conductive base material are covered and sealed by the rubber elastic sheet pieces while covering at least the extracted peripheral edge portion. .   The stretchable elastic sheet according to any one of claims 7 to 9, wherein a single or a plurality of the conductive base materials are provided along the longitudinal direction.   The stretchable elastic sheet according to any one of claims 7 to 10, wherein the extracted peripheral edge portion is thicker on the long side than on the inner side.   The stretchable elastic sheet according to claim 7, wherein the conductive base material has the conductive layer on a flexible support.   The stretchable elastic sheet according to any one of claims 7 to 12, wherein the conductive layer is a metal film layer, an organic conductive film layer, and / or a conductive inorganic material-containing conductive film layer. The punching slit has a through hole at each end, and / or at least one of the punching hole, the punching gap, the punching peripheral portion, and the bridging neck is rounded at each corner. The stretchable elastic sheet according to any one of claims 7 to 13, being characterized by being provided.   The stretchable elastic sheet according to any one of claims 7 to 14, wherein the conductive base material has an electrical connection connector at an end of the conductive layer.   The stretchable elastic sheet according to claim 1, wherein the rubber elastic sheet piece is made of conductive rubber.   The elastic elastic sheet according to claim 16, wherein the rubber elastic sheet piece has an electrical connection connector at an end thereof.   An elastic conductive wiring module comprising a single elastic elastic sheet or a plurality of elastic elastic sheets according to any one of claims 7 to 17.   The stretchable conductive wiring module according to claim 18, wherein a plurality of the stretchable elastic sheets are overlapped and integrated.   The expandable conductive wiring module according to any one of claims 18 to 19, wherein each of the plurality of conductive base materials individually serves as a terminal at a terminal, and the terminal is connected to an external terminal. .   The stretchable conductive wiring module according to any one of claims 18 to 20, wherein the plurality of conductive base materials are a pair or a plurality of pairs of electrodes.

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