JPWO2020195845A1 - Elastic elastic sheet - Google Patents

Abstract

It has sufficient flexibility and flexibility such as elasticity, and can be made lighter, thinner, and smaller, can exhibit high extension rate and low stress, and twists in a predetermined direction during expansion and contraction. It has excellent resilience and robustness that can withstand repeated expansion and contraction and does not cause a decrease in elasticity. Provided is an elastic elastic sheet having excellent durability.
_{The elastic elastic sheet 1 is a repeating structure unit U 1} , U ₂ ... In which a rubber elastic sheet piece 10A is provided with a through slit and / or a through hole 13a and a notch slit and / or a notch hole. A stretch elastic sheet having a plurality of elastic elastic sheets arranged in series along the stretching direction D, which is the longitudinal direction, and / or arranged in parallel with the series, wherein the repeating structure units U ₁ , U _2, ... -Each of them is asymmetric so that they are tilted and stretched in the same direction.

Description

The present invention is an elastic elastic sheet that can be stretched / restored and is hard to break by exhibiting peculiar stretching characteristics accompanied by three-dimensional deformation that is twisted in a predetermined fixed direction when tensile stress is applied / released in the stretching direction. The present invention relates to a stretchable elastic sheet that can also be used as a wiring component for a flexible device such as a wearable device or a flexible substrate.

Electronic devices used to be those in which wiring was attached on a hard silicon substrate, glass substrate, or the like to mount electronic components such as IC chips. Recently, as flexible electronic components having flexible wiring materials and wiring boards that can follow the movement of a living body, electronic devices such as wearable devices, medical devices, physical ability measurement devices, and movable devices of industrial robots are used. It has come to be.

Therefore, electronic devices are required to be lighter, thinner, and smaller, and have sufficient flexibility and elasticity such as elasticity and resilience, and robustness that does not break during stretching and does not lose elasticity after repeated expansion and contraction. Has come to be required.

The flexibility of electronic devices in the field of electronics has attracted a great deal of attention due to the rise of wearable devices and the like.

As a flexible substrate due to having a curved structure in the telescopic wiring, Patent Document 1 states that the thermoplastic elastomer is exposed in a stretchable flexible circuit board in which the flexible circuit board body is made of a stretchable thermoplastic elastomer. A stretchable flexible circuit board in which a rough surface for preventing sticking is formed on the outer surface of the main body of the circuit board is disclosed. Since this flexible circuit board is only deformed in two dimensions, it does not reach a high stretch of 100% or more (stretching to 2 times).

In addition, sheet-shaped flexible substrates have been developed that are much lighter, thinner, and smaller than bulky wiring devices such as curl cords. For example, in Patent Document 2, it is a stretchable flexible substrate having an insulating film base material provided with wiring, and the insulating film base material has an opening having a slit. The open state of the above is held by an insulating member, and the stretchable flexible substrate illustrated in the honeycomb structure is disclosed. Such an elastic flexible substrate exhibits elasticity by three-dimensional deformation by punching and forming a cut paper shape into a conductive sheet forming a conducting wire.

However, conventionally, a repeating structure such as an individual honeycomb structure in a kirigami shape has been symmetrical with respect to a base axis perpendicular to the expansion and contraction direction. Therefore, in such a symmetrical kirigami shape, as shown in FIG. 14A, the twisting direction of each repeating structure unit with respect to the expansion / contraction direction is diagonally upward twisting and diagonally downward twisting with the same probability. It can happen. Therefore, as shown in FIG. 6B, in a plurality of particularly long repeating structures, some patterns of expansion and contraction deformation in which the twisting direction is different in the middle occur. Actually, which pattern is used depends on various factors such as slight non-uniformity of each repeating structure unit and non-uniform tensile stress applied by slight distortion. Because it is randomly determined by itself, it occurs irregularly, so it is difficult to align the direction of deformation, and once it is deformed unevenly, it becomes habitual and even if it repeats expansion and contraction, the pattern of the uneven orientation Only can be taken. As a result, there is a problem that stress concentration is caused at the reversal point in the twisting direction and the expansion / contraction durability is deteriorated.

Higher extension rate and lower stress can be achieved with a simpler configuration than the conventionally known elastic flexible circuit board having a curved structure in the elastic wiring and the elastic flexible substrate having a honeycomb structure, and it is tilted in a predetermined fixed direction. An elastic sheet that can be repeatedly expanded and contracted by three-dimensional deformation due to twisting and has sufficient flexibility, excellent resilience, and toughness has been desired.

Further, as in the conventional case, in a kirigami structure cut sheet having a repeating structure symmetrical with respect to a base axis perpendicular to the expansion / contraction direction and simply having the same repeating structure unit such as a kirigami structure, the twisting direction is reversed. Since it is easy to break at random as a starting point, a stretchable elastic sheet that is hard to break even during stretching and can control breakage has been desired. Furthermore, by making this elastic sheet conductive, it exhibits high conductivity and high insulation to the outside, which are wiring parts for flexible devices, and has high elongation, low stress, sufficient flexibility, and excellent resilience. There has been a demand for a stretchable elastic sheet that can be used in a stretchable conductive wiring module that exhibits both robustness and robustness.

Japanese Unexamined Patent Publication No. 2013-187380 Japanese Unexamined Patent Publication No. 2015-198102

The present invention has been made to solve the above-mentioned problems, and has sufficient flexibility and flexibility such as elasticity, can be made lighter, thinner, and smaller, and has a high elongation rate and low stress. It is possible to repeat three-dimensional deformation by twisting in a predetermined fixed direction at the time of expansion and contraction, and it has excellent resilience and robustness that can withstand repeated expansion and contraction and does not cause a decrease in elasticity, and twisting. It is hard to break during stretching and has excellent durability because it does not cause a reversal point in the direction of elasticity, and by having a conductive base material as needed, it has high conductivity inside and high insulation to the outside. It is an object of the present invention to provide a stretchable elastic sheet which has high extensibility, low stress, sufficient flexibility, and can be used as a stretchable conductive wiring module exhibiting excellent resilience and robustness.

The elastic elastic sheet described in the claims, which has been made to achieve the above object, includes a rubber elastic sheet piece having a through slit and / or a through hole, and a notch slit and / or a notch hole. A stretch elastic sheet having a plurality of repeating structure units provided with the above in series along the stretching direction, which is the longitudinal direction, and / or arranged in series and in parallel. Each is characterized in that it is asymmetric so that it is tilted and stretched in the same direction.

The elastic elastic sheet includes a plurality of the through slits and / or a plurality of the through holes arranged in series and / or in parallel with the series while intersecting the stretching direction of the rectangular rubber elastic sheet piece. A row of peripheral connection portions including a plurality of peripheral edge 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 the notch slits and / or a plurality of the notch holes which are alternately provided and cut from the long sides of both of the rubber elastic sheet pieces while facing each other inward, and the notch slits which face each other. And / or having a plurality of intercut connecting portions connected between the notch holes, the through slit and / or the through hole, the peripheral connection portion, the notch slit and / or the notch. At least one of the hole, the joint between the cuts, the rubber elastic sheet piece, and the elastic elastic sheet is made asymmetric in the repeating structure unit so as to be inclined and stretched in the same direction. Is preferable.

The elastic elastic sheet is, for example, the through slit and / or the through hole, the peripheral edge connecting portion, the notch slit and / or the notch hole, the intercut connecting portion, the rubber elastic sheet piece, and the like. The elastic elastic sheets are said to have a shape, thickness, material, and / or hardness selected from at least one of their shapes, structures, positions, ranges, sizes, widths, lengths, and distances. It is said to be asymmetric.

The elastic elastic sheet has, for example, at least one of the through slit and / or the through hole, the peripheral edge connecting portion, the notch slit and / or the notch hole, and the intercut connecting portion, respectively. The shape is asymmetric with respect to the base axis perpendicular to the stretching direction of each repeating structure unit.

In this elastic elastic sheet, at least one of the through hole, the peripheral edge connecting portion, the notch hole, and the inter-cutting connecting portion is rounded at each corner, and the corners in the stretching direction are rounded to each other. It is preferable that the repeating structure unit has the asymmetry because it has different radiuses.

In this elastic elastic sheet, for example, the different radiuss have one set to 1: 0 to 1: 0.01 and the other set to 1: 0.03 to 1: 0.05 with respect to the width of the rubber elastic sheet piece. By setting, and / or one having a radius of curvature of 0 to 0.2 mm and the other having a radius of curvature of 0.6 to 1 mm, the repeating structure unit is made said to be asymmetric.

In this elastic elastic sheet, the rubber elastic sheet piece is a laminate of a plurality of rubber elastic film pieces having different materials, thickness and / or hardness, so that the rubber elastic sheet piece is curved. It may be said that the asymmetry is achieved by stretching the rubber in the same direction.

The elastic elastic sheet is a flexible conductive base material having a rubber elastic sheet piece provided with a through slit and / or a through hole and a notch slit and / or a notch hole and having a conductive layer. A plurality of punching peripheral portions that are arranged in series and / or in parallel along the energizing direction of the conductive layer and that pass through the through slit and / or the through hole and / or the through hole, and the notch slit and /. Alternatively, a cross-linking neck that is connected so as to be energized while being partitioned by a punching gap leading to the notch hole is provided, and the repeating structure units provided are arranged in series along the extension direction, which is the longitudinal direction, and / or are arranged in series and in parallel. A stretch elastic sheet having a plurality of pieces, in which at least a part of the conductive base material is sealed and coated with the rubber elastic sheet piece without exposing, and each of the repeating structure units has a plurality of elastic elastic sheets. It is characterized in that it is asymmetric so as to be inclined and stretched in the same direction.

The elastic elastic sheet includes a plurality of the through slits and / or a plurality of the through holes arranged in series and / or in parallel with the series while intersecting the stretching direction of the rectangular rubber elastic sheet piece.
A plurality of peripheral edge 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 are alternately provided. A plurality of the notch slits and / or a plurality of the notch holes cut inwardly facing each other from the long sides of both of the rubber elastic sheet pieces, and the notch slits and / or the notches facing each other. It has a plurality of notch connecting portions connected between the holes, and has the through slit and / or the through hole, the peripheral connection portion, the notch slit and / or the notch hole, and the notch gap. At least one of the connecting portion, the punched slit and / or the punched hole, the crosslinked neck, the conductive substrate, the rubber elastic sheet piece, and the elastic elastic sheet so as to be stretched in the same direction. It is preferable that the rubber is asymmetric in the repeating structure unit.

The elastic elastic sheet is, for example, the through slit and / or the through hole, the peripheral edge connecting portion, the notch slit and / or the notch hole, the intercut connecting portion, the punching slit and / or. The punched hole, the crosslinked neck, the conductive substrate, the rubber elastic sheet piece, and the elastic elastic sheet have at least one of them in shape, structure, position, range, size, width, length, and. It is said that the asymmetry is made depending on the shape, thickness, material, and / or hardness selected from the distance.

In this stretchable elastic sheet, the conductive base material covers the punched peripheral edge portion and the crosslinked neck with the peripheral edge connecting portion and the notch connecting portion in the repeating structure unit, and the through slit and / Alternatively, at least one of the through hole, the cut slit and / or the cut slit and / or the cut hole, the cut peripheral portion, and the cross-linking neck is curved or bent so as not to overlap the cut hole. It may be asymmetrical by having different radiuses between the angles facing each other in the stretching direction.

In this stretchable elastic sheet, for example, the different radiuss are set to 1: 0 to 1: 0.02 on one side and 1: 0.03 to 1: 0.05 on the other side with respect to the width of the conductive base material. By doing so, and / or one having a radius of curvature of 0 to 0.2 mm and the other having a radius of curvature of 0.4 to 1 mm, the repeating structure unit has the asymmetry.

In this elastic elastic sheet, a plurality of dummy patterns that are not in contact with the conductive base material and are not conductive in a base axis perpendicular to the stretching direction are made asymmetric in the repeating structure unit, and the rubber elasticity is formed. In the sheet piece, it may be provided in contact with at least one of the peripheral edge connecting portion and the notch connecting portion.

In this elastic elastic sheet, the conductive base material and the dummy pattern are selected from an etching layer, a printed layer, a metal film layer, an organic conductive film layer, a conductive inorganic substance-containing conductive film layer, and a conductive rubber layer. It may be either.

In this elastic elastic sheet, for example, the rubber elastic sheet piece is curved because the rubber elastic sheet piece is a laminate of a plurality of rubber elastic film pieces having different materials, thickness and / or hardness. At the same time, the rubber is made asymmetric by tilting and stretching in the same direction.

In the elastic elastic sheet, the conductive base material has a flexible support and a conductive layer which is a metal layer attached on the flexible support, and / or the rubber elastic sheet piece forms the conductive base material. It is a laminate of a plurality of rubber elastic film pieces having the same or different material, thickness and / or hardness sandwiched between them, and the conductive base material has the shape, the structure, the position, the range, the size, and the width. , The shape, the thickness, the material and / or the hardness selected from the length and the distance may be said to be asymmetric.

In the elastic elastic sheet, the rubber elastic sheet piece may be a conductive rubber.

The elastic elastic sheet is preferably selected from medical use, examination use, inspection use, packaging use, in-vehicle use, semiconductor use, robot use, and sports use.

The elastic elastic sheet of the present invention includes a through slit or a through hole, a peripheral connection portion, a notch slit or a notch hole, a joint between cuts, a punched slit or a punched hole, a crosslinked neck, a conductive base material, and a rubber elastic sheet. On the other hand, the elastic elastic sheet controls one of them to be stretched by tilting the twisting direction in the three-dimensional deformation exclusively in a predetermined fixed direction by the structure in which one of them is asymmetric, and the strain caused by the expansion and contraction is totally applied. It can be dispersed and high durability can be achieved.

This elastic elastic sheet has a plurality of through slits and through holes, peripheral connection portions, cut slits and cut holes, intercut joints, punched slits and holes, and bridge necks having the same or similar shapes, respectively. Since they are provided side by side and are asymmetrical, they are controlled in a predetermined constant twisting direction even in the first stretching. Therefore, they exhibit peculiar stretching characteristics of stretching that opens in response to the application of tensile stress in the stretching direction and contraction that closes them by releasing the tensile stress.

Even if this elastic elastic sheet repeats expansion and contraction, it is controlled to repeat expansion and contraction only in the same twisting direction due to the twisting habit once attached, and after the tensile stress is released, it quickly becomes uniform to the original shape before stretching. It has excellent resilience and robustness to recover.

This elastic elastic sheet is non-recoverable permanent deformation of the shape due to expansion and contraction in a random twisting direction due to the elastic characteristics and shape characteristics of the rubber elastic sheet piece that three-dimensionally deforms in a predetermined constant twisting direction. Suppress. In addition, since it can be specifically deformed three-dimensionally in the same twisting direction, it has high durability and high three-dimensional deformation specificity because there is no bias in distortion.

In the conventional so-called kirigami sheet, which repeatedly has a monotonous kirigami structure in which the repeating structure unit is symmetrical in the basic axis direction perpendicular to the stretching direction, tensile stress tends to concentrate on the reversal points in the twisting direction that occur randomly during stretching. Therefore, it becomes a fragile part and easily breaks unexpectedly. On the other hand, this elastic elastic sheet has through slits and through holes, peripheral connection portions, cut slits and cut holes, intercut connection portions, punch slits and holes, in the proximal direction perpendicular to the stretching direction. Since the crosslinked neck, the conductive base material, the rubber elastic sheet piece, and the elastic elastic sheet are asymmetric, tensile stress is evenly applied to the repeating structure, and expansion and contraction is controlled only in a desired constant twisting direction. , It does not cause the twisting direction to be reversed, and it is difficult to break even if it is repeatedly expanded and contracted.

In this elastic elastic sheet, a flexible conductive base material having a conductive layer while having a punched hole or a punched slit is sealed with a rubber elastic sheet piece having a through slit or a through hole to cover it. As a result, the conductive base material can be expanded and contracted. Since the conductive base material has a plurality of punched holes and slits, such a stretchable elastic sheet has a conductive layer even if it is deformed by stretching according to tension and subsequent restoration according to release. Is able to follow, and the expansion and contraction is controlled in a desired constant twisting direction, and the durability is excellent as a conductive wiring. Moreover, this stretchable elastic sheet does not change the path length of the conductive layer in the conductive base material due to stretching, and is stretched while being twisted in a desired constant twisting direction to cause partial breakage of the conductive layer. Since it does not break, the resistance value hardly changes even if it expands or contracts. Therefore, it is extremely excellent as a wiring material. Further, even if it has a conductive layer, for example, a metal foil layer in a conductive base material that tends to have a twisting habit, it does not twist in an undesired direction and is excellent in recoverability.

Further, when the conductive base material is sealed with a rubber elastic sheet piece which is an insulating elastic body in order to maintain the elasticity and the insulating property, the elastic elastic sheet can be oriented in a desired constant twisting direction. Combined with the control of expansion and contraction, the elasticity and insulation can be maintained as they were even after repeated expansion and contraction. Moreover, when this elastic elastic sheet is connected to an external device or an object to be measured with a terminal of a conductive base material, it is sealed and coated without being exposed except for the terminal, so that the elastic sheet is in a solution there. It is also useful as an elastic elastic sheet that prevents reception of noise in detection and detection of biological signals.

In contrast to conventional conductive materials that develop elasticity only by two-dimensional expansion and contraction of the material, this elastic elastic sheet has through slits, through holes, and cut slits, unlike the elasticity derived from the physical characteristics of the material. -It is possible to seal with a rubber elastic sheet piece having a shape that does not hinder conductivity and flexibility due to a three-dimensional structural change caused by not only the cut hole but also the punched slit and the punched hole. As a result, 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 properties at the time of deformation, and the expansion and contraction is controlled in a desired constant twisting direction. Together with this, it is possible to realize uniform elasticity as well as high extension rate due to low resistance value and low stress.

In this elastic elastic sheet, when the rubber elastic sheet pieces are a laminate of a plurality of rubber elastic film pieces having different thicknesses and / or hardnesses, the stretchability of each of the plurality of rubber elastic film pieces becomes high at the time of stretching. It bends due to the difference. As a result, with respect to the base axis perpendicular to the expansion and contraction direction, a repeating structure such as a through slit or a through hole, a peripheral connection portion, a notch slit or a notch hole, an intercut connection portion, a punch slit or a punch hole, or a cross-linking neck. Regardless of whether the unit is symmetrical or not, the stretchable elastic sheet itself becomes asymmetrical, and expansion and contraction is controlled in a desired constant twisting direction.

Instead of having a conductive base material, this elastic elastic sheet can be made into a simple and highly elastic wiring material because the rubber elastic sheet piece itself is a conductive rubber and has conductivity. be.

This elastic elastic sheet is flexible and has excellent elasticity, can be made lighter, thinner, and smaller, and the expansion and contraction is controlled in a desired constant twisting direction, which is peculiar. While having excellent deformation characteristics, it exhibits high conductivity inside and high insulation to the outside, and while having sufficient elasticity, it does not cause a decrease in elasticity due to repeated expansion and contraction, and has excellent durability. , Can be used for elastic conductive wiring modules.

When these elastic elastic sheets are used in an elastic conductive wiring module, they suppress the formation of an inverted portion in the twisting direction, which is most likely to cause disconnection during stretching, and are less likely to break. By having such a structure, the surface is sufficiently deformed with an extremely small deformation stress while having excellent resilience after repeated expansion and contraction, which cannot be achieved by a simple rubber elastic sheet or elastic fiber without a break. Alternatively, by providing an internal conductive base material, it can be applied as an elastic wiring having excellent durability, robustness, low resistance value, and high elasticity.

This stretchable elastic sheet can be used as a stretchable elastic sheet in this stretchable conductive wiring module, and extremely small tensile stress causes specific deformation due to three-dimensional structure, especially in a low stretching region. It can be mounted for flexible devices such as wearable devices, flexible substrates, and flexible electrodes.

This stretchable elastic sheet is useful as a stretchable wiring member suitable for an ultra-thin skin contact electrode, a flexible substrate, a wiring member for a robot, etc. in a stretchable conductive wiring module.

When this stretchable elastic sheet is used in a stretchable conductive wiring module, it stretches sufficiently even if the tensile stress is extremely small in a low stretching region, so that the wearer feels uncomfortable when using it as a wearable device. I don't feel it.

This elastic elastic sheet can be used for various purposes such as medical use, medical examination, inspection, packaging, in-vehicle use, semiconductor use, robot use, and sports use, and has high versatility.

It is a top view which shows the use state of the elastic elastic sheet to which this invention is applied. It is a partial plan view which shows the example of the aspect of one repeating structure unit in the elastic elastic sheet to which this invention is applied. FIG. 5 is a partial plan view showing an example of another embodiment of one repeating structure unit in a stretchable elastic sheet to which the present invention is applied. FIG. 5 is a partial plan view showing an example of another embodiment of one repeating structure unit in a stretchable elastic sheet to which the present invention is applied. FIG. 5 is a partial plan view showing an example of another embodiment of one repeating structure unit in a stretchable elastic sheet to which the present invention is applied. FIG. 5 is a partial plan view showing an example of another embodiment of one repeating structure unit in a stretchable elastic sheet to which the present invention is applied. FIG. 5 is a partial plan view showing an example of another embodiment of one repeating structure unit in a stretchable elastic sheet to which the present invention is applied. It is a schematic perspective view which shows the disassembled state of the elastic elastic sheet to which this invention is applied. FIG. 5 is a partial plan view showing an example of an embodiment of one repeating structure unit in another form of elastic elastic sheet to which the present invention is applied. FIG. 5 is a partial plan view showing an example of an embodiment of one repeating structure unit in another form of elastic elastic sheet to which the present invention is applied. FIG. 5 is a partial plan view showing an example of another aspect of one repeating structure unit in another form of elastic elastic sheet to which the present invention is applied. It is a partial plan view which shows the example of the aspect of the elastic elastic sheet of another form to which this invention is applied. It is a plan view and a partial plan view which shows the mode of the stretchable elastic body sheet of the Example to which this invention is applied, and the stretchable elastic body sheet of the comparative example to which this invention is not applied. It is a perspective view which shows the use state of the conventional elastic elastic sheet which does not apply this invention, and one of the repeating structure unit.

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

A preferred first form of the elastic elastic sheet 1 of the present invention will be described with reference to FIG. The first form of the elastic elastic sheet 1 is a non-conductive elastic elastic sheet, in which a rectangular and long rubber elastic sheet piece 10A is provided with a through hole 13a and a notch slit 12b. A plurality of repeating structure units U ₁ , U _2, ... Are provided in series along the stretching direction D, which is the longitudinal direction.

The plurality of through holes 13a are substantially rectangular shapes whose corners are rounded and whose long sides are asymmetric with respect to the base axes along the _{base axes B 1} , B _{2, ...} They are lined up in series while intersecting the stretching direction D of. Further, each of the plurality of pairs of the cut slits 12b is cut inward from the long side along the stretching direction of the rubber elastic sheet piece 10A in the direction perpendicular to the stretching direction D, and the elastic sheet piece 10A is stretched. They are lined up in series, intersecting the direction D and symmetrical about the axis of symmetry facing the stretching direction D. The through hole 13a and the long side of the rubber elastic sheet piece 10A are connected to form a peripheral edge connecting portion 15. The pair of notch slits 12b facing each other are connected to form an inter-cutting connecting portion 14. The repeating structure units U ₁ , U _2, ... Sandwiched between the adjacent notch slits 12b are adjacent to each other with the notch slit 12b as a boundary.

_{In the through hole 13a, both corners 13 Lc} on one end side (left side in the figure) in the longitudinal direction _{have a large radius, and both corners 13 Rc} on the other end side (right side in the figure) have a small radius. As a result, the shape is asymmetric so that it can be stretched in the same direction. That is, each repeating structure unit U ₁ , U ₂ ... Is asymmetric with respect to the respective base axes B ₁ , B _{2 ... perpendicular to the stretching direction.} The base axes B ₁ , B ₂ ... For each of the repeating structure units U ₁ , U ₂ ... Are, for example, the center of the notch slits 12b adjacent to each other.

When both ends of the elastic elastic sheet 1 are pulled in the stretching direction, the double-sided 13 _Lc side having a large radius of the through hole 13a is easy to stretch, _{and the double-sided 13 Rc} side having a small radius is difficult to stretch. Therefore, in the repeating structure units U ₁ , U _{2, ..., Both corners 13 Lc} side having a large radius in all the through holes 13a are easily extended. This asymmetry is the driving force for the repeating structure units U ₁ , U _2, ... To tilt and stretch in the same direction.

The width of the rubber elastic sheet piece 10A is, for example, 5 to 100 mm, preferably 10 to 50 mm. If it is less than this range, it is difficult to introduce the kirigami structure, and if it exceeds this range, the maneuverability deteriorates. Corners ₁₃ different ares in _Lc · corners _{13 Rc} is, to the width of the rubber elastic sheet pieces 10A, in both corner _{13 Lc} having a large radius 1: 0.006: 0.2, preferably from 0.012 to It is preferably 0.1 to 1: 0 to 1: 0.04, preferably 1: 0 to 1: 0.02 _{for both angles 13 Rc having a small radius. The radius of curvature of both angles 13 Lc} having a large radius is 0.2 to 2 mm, preferably 0.4 to 1 mm, and the radius of curvature of both angles 13 _Rc having a small radius is 0 to 1 mm, preferably 0 to 0.6 mm. You may.

In FIG. 1, an example is shown in which the through hole 13a is substantially rectangular _{and has different radiuses at both corners 13 Lc} and both corners 13 _Rc. , The joint between the slits, the rubber elastic sheet piece, and / or the elastic elastic sheet, for each of the repeating structure units U ₁ and U _{2 with respect to the basic axes B 1} and B _{2 ...} ... It may be asymmetrical for each. They form, structure, position, range, size, width, length, and each repetition structure with respect to the shape of the base shaft _B 1 · _B 2 ··· selected from the distance unit _U 1 · _U 2 ··· It is asymmetrical for each. Through slits and cut slits may have holes at the slit ends so that breakage does not start from the ends.

For example, as shown in FIG. 2, a twisted rectangular hole ((a) in the same figure), a trapezoidal hole (which may or may not have different radiuses and may simply have rounded corners). Fig. (B)), triangular holes such as isosceles triangular holes (figure (c)) and unequal-sided triangular holes (figure (d)), semi-circular holes (figure (e)), arcuate Holes (Fig. It may be a polygonal hole as shown in FIG. (J), or a hole having a combination of any of them, for example, a hole having a shape in which an arc and a quadrangle are combined (Fig. (K)).

Further, instead of the through hole 13a forming the asymmetry, as shown in FIG. 3, a through slit 13b is used, and each repeating structure unit U _{1 is formed in the directions of the basic axes B 1} , B _{2 ...} -Each U ₂ ... may be asymmetric. As the through slit 13b, a through slit which may have a hole so that breakage does not start from the end, specifically, an arc slit (FIG. (A)) and an arc slit having holes at both ends (FIG. FIG. (b)), bending slits (Fig. (C)), parallel slits of different lengths (Fig. There may be.

Further, FIG. 1 shows an example in which a through hole 13a is opened and a plurality of pairs of cut slits 12b are cut toward the inside of the rubber elastic sheet piece 10A in a direction perpendicular to the stretching direction. As shown in FIG. 4, a linear through slit 13b which may have a hole is provided inside the rubber elastic sheet piece 10A in a direction perpendicular to the stretching direction, and may have a hole and is asymmetric. It may have a notch slit 12b to be formed. Such cutting slits 12b, specifically, as shown in FIG. 4, in the extending direction D perpendicular to the base shaft _B 1 · _B 2 ··· direction, the repeating structural units _U 1 · _U 2 ··・ Each of them forms an asymmetry by deviating from the basic axes B ₁ , B _2, ..., Arc slit (Fig. (A)), curved edge slit (Fig. (B)), oblique edge slit (Fig. (c)), bent edge slits (Fig. (D)), parallel sides with different lengths (Fig. (E), (f)), or a combination of them, for example, wavy slits (Fig. (G)) Such a shape can be mentioned.

Instead of the notch slit 12b as shown in FIG. 4, it may have a notch hole 12a forming an asymmetry as shown in FIG. Such cutout hole 12a, specifically, in the stretching direction D perpendicular to the base shaft _B 1 · _B 2 ··· direction, for each repeating structural unit _U 1 · _U 2 ···, twist obliquely Cut holes that may have a shaped shape, specifically twisted square cut holes (Fig. (A)), trapezoidal cut holes (Fig. (B)), and triangular cut holes (Fig. (c)), arc-shaped notch (figure (d)), crescent-shaped notch (figure (e)), equilateral polygonal notch (figure (f)), or its Combination shape For example, a shape such as a notch hole ((g) in the figure) having a shape in which an arc and a quadrangle are combined can be mentioned. The example in the figure also serves as an example in which the incision connecting portion 14 and the peripheral connecting portion 15 are asymmetrical.

In the elastic elastic sheet 1, at least one of a through hole 13a and / or a through slit 13b, a peripheral edge connecting portion 15, a notch hole 12a and / or a notch slit 12b, and an inter-cutting connecting portion 14 is adjacent to each other. Due to the shape having a different distance from the slit-to-cut connection portion 14, it is asymmetric _{in the repeating structure units U 1} , U ₂ , ... In the direction of the _{baseline B 1} , B _{2, ...} It may be the one that is supposed to be. For example, as shown in FIG. 1, instead of the _{asymmetric through hole 13a being located on the base axes B 1} , B _{2 ...} Base shafts B ₁ and B ₂ ... Through holes 13a (the figure (a)) or through slits 13b (the figure) that are offset from the top and have different distances or widths from the adjacent notch slits 12b. (b)) may be used.

In the elastic elastic sheet 1 as shown in FIGS. 1 to 6, the through hole 13a and / or the through slit 13b, the peripheral edge connecting portion 15, the notch hole 12a and / or the notch slit 12b, and the notch connecting portion 14 Depending on the structure, asymmetry is formed _{in the repeating structure units U 1} , U ₂ , ... In the direction of the _{basic axes B 1} , B _{2, ...} It is possible to repeat three-dimensional deformation due to twisting in the direction.

As such an elastic elastic sheet 1, in FIGS. 1 to 6, through holes 13a and / or through slits 13b, peripheral edge connecting portions 15, notch holes 12a and / or notch slits 12b, and notch connecting portions 14 Although the example in which the asymmetry is formed by the structure of the above is shown, the asymmetry may be formed by the material, the thickness, and the hardness of the rubber elastic sheet piece (not shown). Specific examples of the rubber elastic sheet piece include a laminate of a plurality of rubber elastic film pieces having different materials, thicknesses and / or hardnesses. Since such a laminated body is different in material, thickness and / or hardness, when the elastic elastic sheet 1 is pulled in the stretching direction D, the tensile strength of each rubber elastic film piece is different. Therefore, it becomes difficult to bend on one side of the rubber elastic film having a stronger tensile strength, and on the other hand, it becomes easier to bend on one side of the rubber elastic film having a weaker tensile strength. Accompanying that, the slight curvature results in asymmetry in the stretching direction D. Following the curvature, the through hole 13a and / or the through slit 13b, the peripheral edge connecting portion 15, the notch hole 12a and / or the notch slit 12b, and the intercut connecting portion 14 form the basic axes B ₁ , B _2, ... Regardless of whether it is symmetric or asymmetric in the direction, as a result of tilting and stretching in the same direction according to this curvature, it is possible to repeat three-dimensional deformation by twisting in a predetermined fixed direction at the time of expansion and contraction.

_{An example in which the repeating structure units U 1} , U _2, ... Are arranged in series as the elastic elastic sheet 1 is shown, but they may be arranged in parallel, or may be arranged in series and in parallel.

The elastic elastic sheet 1 includes a plurality of through holes 13a and / or a plurality of through slits 13b, a plurality of peripheral edge connecting portions 15, a plurality of notch holes 12a and / or a plurality of notch slits 12b, and a plurality of notches. In addition to the mode in which all the connecting portions 14 are asymmetrical in the same shape (see, for example, FIG. 1), at least one of them may be asymmetrical in a similar shape (not shown).

The stretchable elastic sheet 1 has shown an example in which the through holes 13a (see FIG. 1) have different radiuses, but as shown in FIG. 7, the peripheral edge connecting portion 15, the notch hole 12a, and the notch connecting portion 14 At least one of the above is rounded at each corner, and the corners in the stretching direction D have different radiuses, so that the repeating structure units U ₁ , U _2, ... Are asymmetrical. It may be.

Such elastic elastic sheet 1 is used for non-conductive applications, for example, for medical use such as joint supporters, bandages, and compresses, for packing and holding for transporting valuables and ornaments having complicated shapes. Can be used as. Such elastic elastic sheet 1 may be used for conductive applications.

The elastic elastic sheet 1 may be used as one of a pair of electrodes for detecting a biological signal because the rubber elastic sheet piece 10A is a conductive rubber, and the rubber elastic sheet piece 1 may be used for protection. 10A may be covered with a piece of rubber elastic protective sheet.

The elastic elastic sheet 1 of the first aspect as shown in FIG. 1 is manufactured as follows, for example.

First, a rubber elastic sheet piece 10A is cut out from the rubber elastic sheet, and a through hole 13a and / or a through slit 13b of a predetermined shape having _{both corners 13 Lc} having a large radius and both corners 13 _{Rc having a small radius is cut.} When the insertion hole 12a and / or the notch slit 12b is punched through with a blade, the elastic elastic sheet 1 is manufactured.

Another preferred second form of the stretchable elastic sheet 1 of the present invention will be described with reference to FIG. The second form of the elastic elastic sheet 1 is a flexible and flat conductive base material 20 having a flexible conductive layer 20A and a flexible support 20B, and a rectangular and flat conductive base material 20 sandwiching the flexible conductive base material 20. It has rubber elastic sheet pieces 10B and 30B which are insulating elastic bodies.

In the conductive base material 20, the flexible support 20B formed of an insulating resin and the conductive layer 20A which is a metal layer attached on the flexible support 20B have the same shape. The conductive base material 20 is in the form of a long sheet piece along the current-carrying direction (stretching direction D) of the conductive layer 20A.

The conductive base materials 20 are arranged in series along the stretching direction D through a plurality of substantially rectangular punched holes 23a. The plurality of punched holes 23a are substantially rectangular with rounded corners and long sides facing the base axis perpendicular to the stretching direction D, and are arranged in series while intersecting the stretching direction D. Initially, the punched hole 23a is not extended in the longitudinal direction, but penetrates so that the short side of the rectangular shape is along the longitudinal direction and the long side is perpendicular to the longitudinal direction. Each of the outer edges of the punched holes 23a is a plurality of punched peripheral edges 24 forming a part of the conductive layer 20A and the flexible support 20B. The conductive base material 20 has a punching gap 22 between each of the plurality of punching peripheral edge portions 24 adjacent to each other. Each of the adjacent punched peripheral portions 24 has a crosslinked neck 25 located in the center along the longitudinal direction of the conductive base material 20. Similar to the punched peripheral edge portion 24, the crosslinked neck 25 forms a part of the conductive layer 20A and the flexible support 20B, so that the conductive layer 20A can be energized.

_{In the punched hole 23a, both corners 23 Lc} on one end side (left side in the figure) in the longitudinal direction _{have a large radius, and both corners 23 Rc} on the other end side (right side in the figure) have a small radius. As a result, the shape is asymmetric so that it can be stretched in the same direction. That is, each of the repeating structure units U ₁ , U _2, ... Is asymmetric with respect to the basic axes B ₁ , B _{2, ... perpendicular to the stretching direction.}

The rubber elastic sheet pieces 10B and 30B have the same length as the conductive base material 20 in the stretching direction D, and are longer than the conductive base material 20 in the direction perpendicular to the stretching direction D so as to wrap the conductive base material 20. It is designed to have a margin. The punched peripheral edge portion 24 is sealed and covered with rubber elastic sheet pieces 10B and 30B so that the crosslinked neck 25 is not exposed to the outside world.

In each of the rubber elastic sheet pieces 10B and 30B, through slits 13b and 33b smaller than the punched hole 23a penetrate through the punched hole 23a in the punched peripheral portion 24, respectively. Since the through slits 13b and 33b are smaller than the punched holes 23a, the rubber elastic sheet pieces 10 and 30 are sealed so as to wrap the punched peripheral edge portion 24 with the margins of the through slits 13b and 33b joined to each other. By adhering and covering, the punched peripheral edge portion 24 is prevented from being exposed to the outside world.

Further, in each of the rubber elastic sheet pieces 10B and 30B, the cut slits 12b and 32b smaller than the punching gap 22 penetrate through the punching gaps 22 between the punching peripheral portions 24, respectively. The cut slits 12b and 32b are cut so as to be orthogonal to the longitudinal direction of the rubber elastic sheet pieces 10B and 30B from both sides toward the center and not to reach the cross-linking neck 25. Since the cut slits 12b and 32b of the rubber elastic sheet pieces 10B and 30B are smaller than the punching gap 22, the rubber elastic sheet pieces 10B and 30B are sealed so as to wrap the punched peripheral edge portion 24 with the margin where the peripheral edges of the cut slits 12b and 32b are joined to each other. By stopping and adhering and covering, the punched peripheral portion 24 and the crosslinked neck 25 are prevented from being exposed to the outside world.

_{In the punched hole 23a, both corners 23 Lc} on one end side (left side in the figure) in the longitudinal direction _{have a large radius, and both corners 23 Rc} on the other end side (right side in the figure) have a small radius. As a result, the shape is asymmetric so that it can be stretched in the same direction. That is, each of the repeating structure units U ₁ , U _2, ... Is asymmetric with respect to the basic axes B ₁ , B _{2, ... perpendicular to the stretching direction.}

When both ends of the stretchable elastic sheet 1 are pulled in the stretching direction D, the double-sided 23 _{Lc side having a large radius is likely to be stretched, and the double-sided 23 Rc} side having a small radius is difficult to stretch. Therefore, in the repeating structure units U ₁ , U _{2, ..., Both corners 23 Lc} side having a large radius in all the punched holes 23a are easily extended. This asymmetry is the driving force for the repeating structure units U ₁ , U _2, ... To tilt and stretch in the same direction.

In the elastic elastic sheet 1, the cut slit 12b and the through slit 13b of the rubber elastic sheet piece 10B, which is an insulating elastic body, and the cut slit 32b and the through slit 33b of the rubber elastic sheet piece 30B are made of a conductive base material. Through the punching gap 22 between the punching peripheral edges 24 of 20 and the punching holes 23 in the punching peripheral edges 24, they overlap each other and are adhered to each other with the margins there. As a result, the punching peripheral portion 24 can be opened and closed from a rectangular shape to a rhombus shape, and the punching gap 22 can be separated, so that the stretchable elastic sheet 1 can be expanded and contracted. There is. _{Further, the stretchable elastic sheet 1 is asymmetrical due to the double-sided 23 Rc} and the double-sided 23 _Lc of the punched hole 23a, so that the elastic elastic sheet 1 can be tilted in the same direction and stretchable.

Since the elastic elastic sheet 1 is covered with the rubber elastic sheet pieces 10B and 30B on the front surface side and the back surface side, the edges of the side surfaces along the stretching direction D are completely sealed and not exposed. However, the edges of the ends 21 and 26 at both ends in the stretching direction D are exposed so that they can be connected to an external device if necessary.

The width of the conductive base material 20 is, for example, 10 to 50 mm. The different radiuses of the holes 23 in the conductive base material 20 at both corners 23 _Lc and both corners 23 _Rc are 1: 0.006 to 1: 0 at both _{corners 23 Lc} having a large radius with respect to the width of the conductive base material 20. .2, preferably 1: 0.012 to 1: 0.1, with a double angle of 23 _Rc having a small radius of 1: 0 to 1: 0.04, preferably 1: 0 to 1: 0.02. Is preferable. _{The radius of curvature of the double-sided 23 Lc} having a large radius may be 0.2 to 2 mm, preferably 0.4 to 1 mm, and the radius of curvature of the double-sided 23 _Rc having a small radius may be 0 to 0.6 mm.

The stretchable elastic sheet 1 as punched hole 23a of the conductive substrate 20, an example is shown with different radius at the two corners _{23 Lc} · corners _{23 Rc} substantially rectangular, the repeating structural units _U 1 · _{U 2} ... If the punched peripheral portion 24 is asymmetrical, as shown in FIG. 9, it may or may not have a different radius, and the corners are simply rounded or small holes are formed in the corners. The holes 23a are twisted rectangular holes (Fig. (A)), trapezoidal holes (Fig. (B)), isosceles triangular holes (Fig. (C)), and unequal-sided triangular holes. (Triangular hole (Fig. (D)), semi-circular hole (Fig. (E)), arc-shaped hole (Fig. (F)), crescent-shaped hole (Fig. (G)), isosceles or non-isosceles Equal-sided rectangular holes (Fig. (H)), trapezoidal holes (Fig. (I)), pentagonal holes (Fig. (J)), hexagonal holes (Fig. (K)), or polygonal holes. A hole having any combination of these shapes, for example, a hole having a shape obtained by combining an arc and a quadrangle (FIG. (K)) may be used. Drain hole 23a is shifted from on the base shaft B _1, which may be the distance or width from venting gap 22 adjacent to each other are different from those (FIG. (M)). A large radius may be provided near the outer edge of the punching peripheral portion 24 on one side of the stretching direction D so that the punching gap 22 is asymmetrical (Fig. (N)), and is inclined to one side of the stretching direction D. (Fig. (O)). As long as the punched slit 23b is asymmetrical instead of the punched hole 23a, it may be arcuate (Fig. (P)) or bracket-shaped (figure (q)). The distances or widths from the adjacent slits 22 may be different (Fig. (R)).

In this elastic elastic sheet 1, instead of the punching holes 23a and the punching slits 23b being asymmetrical, as shown in FIG. 10, the vicinity of the inner edge of the punching gap 22 is provided with a large radius on one side of the stretching direction D. May be.

As shown in FIG. 8, the stretchable elastic sheet 1 shows an example in which the punched peripheral edge portion 24 and the cross-linked neck 25, which are the conductive portions of the conductive base material 20A, are single lines, as shown in FIG. 11 (a). to, for each repeating structural unit _U 1 · _U 2 ··· in the stretching direction D perpendicular to the base shaft _B 1 · _B 2 ··· direction, multi-line as a conductive substrate 20A sandwiched by the rubber elastic sheet pieces 10B · 30B The punching peripheral portions 24a and 24b and the bridging necks 25a and 25b are made to have punching holes 23a and 23b, respectively, and the corners of the punching holes 23a _Lc and 23a _Rc and 23b _Lc and 23b _Rc are made asymmetrical and penetrated. The slit 13b may be opened. By forming the stretchable elastic body sheet 1 in which the punched peripheral edges 24a and 24b and the cross-linked necks 25a and 25b are double-tracked, a pair of stretchable elastic bodies must be used because the punched peripheral edges 24 and the cross-linked neck 25 are made into a single wire. The number of members can be reduced as compared with the sheet 1.

As shown in FIG. 11B, the elastic elastic sheet 1 is formed on the flexible support 20B along with the punched peripheral portions 24a and 24b and the crosslinked necks 25a and 25b, and the inner end of the punching gap 22. It may have a dummy pattern 28a surrounding the portion and / or a dummy pattern 28b surrounding the outer end portion of the _{punched hole 23b 1.} The dummy patterns 28a · 28b are not conductively, in the stretching direction D perpendicular to the base shaft _B 1 · _B 2 ··· directions a non-contact the flexible conductive layer 20A, the repeating structural unit _{U 1} · U ₂ ... While being asymmetrical in the rubber elastic sheet pieces 10B and 30B, they are provided in contact with at least one of the peripheral edge connecting portion 15 and the incision connecting portion 14 in the upper and lower directions (see FIG. 8). ..

In the punched hole 23a of the punching peripheral edge portion 24a inside the double track, both corners 23a _Lc on one end side (left side in the figure) in the longitudinal direction have a large radius, and both corners on the other end side (right side in the figure). 23a _Rc has a small radius. Further, in the punching hole 23b of the punching peripheral edge portion 24b outside the double track, both corners 23b _Lc on one end side (left side in the figure) in the longitudinal direction have a large radius, and both corners on the other end side (right side in the figure). 23b _Rc has a small radius.

In the dummy pattern 28b surrounding the inner end of the through slit 13b, the outer edge angle 28b _{Lc on one end side (left side in the drawing) in the longitudinal direction has both corners 23a Lc} of the inner punch hole 23a and both corners of the outer punch hole 23b. It _{has a large radius corresponding to 23b Lc, and the outer edge angle 23b Rc} on the other end side (right side in the figure) has a small radius corresponding to both _{corners 23a Rc} of the punch hole 23a _{and both corners 23b Rc} of the punch hole 23b. doing.

The dummy patterns 28a and 28b, along with the punched peripheral portions 24a and 24b and the crosslinked necks 25a and 25b, are an etching layer, a printed layer, a metal film layer, an organic conductive film layer, a conductive film containing a conductive inorganic substance, or a conductive rubber. It may be formed together as a layer.

Through holes 13a / 33a and / or through slits 13b / 33b, peripheral connection 15, cut slits 12b / 32b and / or cut holes 12a / 32a, cut-to-cut connection 14, punch holes 23a and / or punch slits 23b, the crosslinked neck 25, the conductive base material 20, the rubber elastic sheet pieces 10A, 10B, 30B, and the elastic elastic sheet 1 have the same shape, structure, position, range, size, and width as in the first form. It may be asymmetric depending on the shape, thickness, material, and / or hardness chosen from, length, and distance, especially by rounding the corners.

The rubber elastic sheet pieces 10B and 30B may be the same as the rubber elastic sheet pieces 10A in the first form of the elastic elastic sheet 1.

The operation of the elastic elastic sheet 1 in the first or second aspect will be described below by taking the case of the second aspect (see FIG. 8) as an example.

The elastic elastic sheet 1 is initially substantially flat depending on the flat conductive base material 20 and the flat rubber elastic sheet pieces 10B and 30B. When the elastic elastic sheet 1 is pulled with a relatively weak tensile force so that the ends 11, 21, 31 and the ends 16, 26, 36 are separated from each other along the stretching direction D, both angles 23 _Lc are large. _{Since both corners 23 Rc} on the other end side (right side in the figure) _{have a round, the double corner 23 Lc} side having a large round of the punched holes 23a is easy to stretch, and the round is smaller than that. Due to the fact that the _{double- sided 23 Rc} side having the above is difficult to stretch, the _{double-sided 23 Lc} side is stretched first for each of the _{repeating structure units U 1 , U 2, ..., And the double-sided 23 Rc} is stretched later so as to follow it. As a result, as in FIG. 1, from (a) to (b), the punching peripheral edge portion 24 is slightly twisted and opened while being tilted, and each of the repeating structure units U ₁ , U _2, ... Is tilted in the same direction. In the repeating unit, it tilts in the same direction and begins to stretch. Once tilted in the same direction and started to stretch, the direction of tilt does not reverse when pulled further.

At that time, the short side of the punched peripheral edge portion 24 does not stretch so much against the tensile force and is only slightly twisted, but the long side of the punched peripheral edge portion 24 cannot resist the tensile force and is curved or bent and twisted greatly. .. Further, the notch slits 12b and 32b are opened accordingly. At that time, the cut slits 12b and 32b are cut from both sides but do not reach the cross-linking neck 25, so that the vicinity of the cross-linking neck 25 is not twisted so much and opens while tilting. Accordingly, the conductive base material 20 and the rubber elastic sheet pieces 10B and 30B adhering to the conductive base material 20 are similarly twisted and stretched, and as a result, the elastic elastic sheet 1 is stretched.

At this time, the inside of the punched peripheral edge portion 24 is opened in the longitudinal direction, and the rectangular shape of the punched hole 23 is changed to a twisted substantially rhombic shape or a substantially polygonal shape having the bridging neck 25 and the short side inside the punched peripheral edge portion 24 as corners. By deforming, it contributes to stretching. On the other hand, since the crosslinked neck 25 cannot extend and is not twisted, it does not contribute to stretching, but rather prevents the peripheral portion 24 from being excessively deformed or insufficiently deformed.

As a result, the stretchable elastic sheet 1 is freely stretched as long as it is not pulled strongly enough to tear the punched peripheral edge portion 24. Further, when the material is tilted in the same direction and stretched, the habit is attached to the material, and the material is not stretched in the opposite direction.

After that, when the elastic elastic sheet 1 is stopped from being pulled and the tensile force is released, the elastic elastic sheet 1 returns to its original shape according to the elastic force of the rubber elastic sheet pieces 10B and 30B, as in FIG. 1A. As described above, the punched peripheral edge portion 24 and the cut slits 12b and 32b are closed while eliminating the twist and reducing the inclination. At that time, the short side portion of the punched peripheral edge portion 24 does not expand or contract, but the twist is eliminated, the long side portion of the punched peripheral edge portion 24 releases the tensile force, and the cut slits 12b and 32b have the tensile force. Is eliminated, and accordingly, their curvature or bending is re-deformed so as to return to the original state. Accordingly, the elastic elastic sheet 1 shrinks to its original shape while eliminating the twist and inclination of the conductive base material 20 and the rubber elastic sheet pieces 10B and 30B. At this time, the inside of the punched peripheral portion 24 and the cut slits 12b and 32b contribute to closing and shrinking along the longitudinal direction. On the other hand, since the crosslinked neck 25 does not shrink, it does not contribute to expansion and contraction, but rather helps to return to the original shape of the peripheral portion 24. In this way, the elastic elastic sheet 1 is restored to a stretched shape.

The elastic elastic sheet 1 is formed by only deforming the shape of the conductive base material 20 by a plurality of holes 23 arranged side by side at the time of expansion and contraction, and sealing the elastic elastic sheet pieces 10B and 30B. , There is almost no stress applied to the elastic movement. In particular, in the low stretch region, almost no stress change occurs.

The stretchable elastic sheet 1 is _{tilted and stretched in the same direction by the repeating structure units U 1} , U _2, ..., And once stretched, it becomes habitual and becomes more easily tilted and stretched only in the same direction. Moreover, the stretchable elastic sheet 1 is not only excellent in robustness and durability characteristics without causing permanent deformation or breakage due to a change in the shape of the conductive base material 20 even if it is repeatedly stretched and contracted, and also has excellent resistance of the conductive base material 20. It has excellent conductivity characteristics with almost no change in value.

In this elastic elastic sheet 1, the conductive base material 20 is firmly sealed with a rubber elastic sheet piece except for the terminal edges of the ends 21 and 26 which can be terminals, which causes an unexpected electric leakage or electric discharge. It has excellent electrical characteristics.

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

For the elastic elastic sheet 1, the conductive layer 20A may be appropriately selected so that the resistance value when the rubber elastic sheet pieces 10B and 30B are not covered is a maximum of 1 kΩ, preferably a maximum of 0.2 kΩ. preferable. 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 elastic 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 is a flexible material made of a conductive material in the conductive base material 20. It can be arbitrarily selected from a conductive inorganic material-containing conductive film layer such as a carbon paste-containing conductive film layer, an organic conductive film layer made of an organic conductor or an organic conductive ink, and the like. Above all, the conductive layer 20A is preferably copper, silver, or gold having low resistance and high elongation. The conductive layer 20A can be arbitrarily set to a thickness of 1 nm to 1 mm. If it falls below this range, it becomes difficult to form the conductive layer 20A into a homogeneous layer, and the conductivity deteriorates. 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, or polyethylene terephthalate if the flexible support 20B is a flexible and elastic material made of an insulating material in the conductive base material 20. , Polycarbonate, polyacetal, engineered plastic exemplified by polyamide, polyimide, polyether ether ketone, super engineer plastic exemplified by polyphenylene sulfide, etc. can be selected arbitrarily, among which polyimide, polyethylene terephthalate, polycarbonate, polyphenylene can be selected. It is preferably made of sulfide or the like. The flexible support 20B can be arbitrarily set to a thickness of 1 μm to 1 mm. Below this range, it becomes difficult to maintain insulation and support. 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.

The stretchable elastic sheet 1 is like polydimethylsiloxane, polydiphenylpolysiloxane, or polyfluorosiloxane as long as the rubber elastic sheet pieces 10A, 10B, and 30B are made of an insulating material and can be covered flexibly. Silicone resin and silicone rubber, flexible polyurethane, polyurethane such as hard polyurethane, plastic elastomer such as polystyrene, ethylene propylene rubber such as ethylene propylene diene rubber, vinylidene fluoride, tetrafluoroethylene-propylene, Fluorine rubber such as tetrafluoroethylene-purple orovinyl ether can be arbitrarily selected, but silicone resin or silicone rubber having excellent insulation and processability is more preferable. The rubber elastic sheet pieces 10A, 10B, and 30B can be arbitrarily set to a thickness of 10 μm to 10 mm. Below this range, it becomes difficult to maintain durability and insulation. If it exceeds that range, it will be difficult to maintain flexibility, or if it is not pulled forcibly, it will be difficult to stretch and it will be inferior in elasticity. The lower limit is preferably 10 μm, more preferably 20 μm. The upper limit thereof is preferably 5 mm, more preferably 1 mm, and even more preferably 200 μm.

For the elastic elastic sheet 1, the hardness of the rubber elastic sheet pieces 10A, 10B, and 30B can be arbitrarily selected in the range of 10 to 90 in the shore A hardness. Above all, it is more preferable that the shore A hardness having good strength and stretchability is 10 to 50.

As shown in FIG. 12A, the elastic elastic sheet 1 has an electrical connection connector 29a, which is attached to one end 21 of the conductive layer 20A sealed by the one ends 11 and 31 of the rubber elastic sheet pieces 10B and 30B. For example, it may have a ring snap terminal and a cable clamp terminal for connecting to an external device.

The stretchable elastic sheet 1 can be used as one of a pair of electrodes for detecting a biological signal when the punched peripheral edge portion 24 and the crosslinked neck 25, which are conductive portions of the conductive layer 20A, are single wires. The stretchable elastic sheet 1 can be used as both electrodes when the punched peripheral edge portion 24 and the crosslinked neck 25 are double-tracked.

As shown in FIG. 12B, the conductive base material 20 is covered with rubber elastic sheet pieces 10B and 30B, with the ends 21 and 26 partially exposed and soldered to the connection cord 29b. You may.

Such an elastic elastic sheet 1 can detect a signal from 1 Hz to 100 kHz. Usually, the biological signal is several Hz to several kHz, especially about 100 Hz in the case of a myoelectric signal, so that the elastic elastic sheet 1 can sufficiently detect it.

The stretchable elastic sheet 1 (see FIG. 8) of the second aspect is manufactured, for example, as follows.

First, the conductive base material 20 is produced. As the conductive base material 20, Cu sputtered polyimide in which a copper film is sputtered on a polyimide film is prepared. Next, a punched hole 23a in which both _{corners 23 Lc} on one end side (left side in the figure) in the longitudinal direction _{have a large radius and both corners 23 Rc} on the other end side (right side in the figure) have a small radius is formed. It is formed by punching with a blade mold. As a result, a punching hole 23, a punching gap 22 between them, a punching peripheral edge portion 24 inevitably formed by them, and a cross-linking neck 25 connecting the punching holes 23 are formed in the middle of the long conductive base material 20. , Obtains a conductive base material 20.

Next, rubber elastic sheet pieces 10B and 30B are produced. While cutting the silicone rubber sheet to a size larger than the outer shape of the conductive base material 20, through slits 13b and 33b smaller than the punched holes 23a are aligned with the positions of the punched holes 23a in the punching peripheral edge portion 24. The rubber elastic sheet pieces 10B and 30B are obtained by cutting the cut slits 12b and 32b smaller than the punching gap 22 in accordance with the position of the punching gap 22 between the punching peripheral portions 24.

Finally, the punched holes 23 and the through slits 13b and 33b are aligned, and while the punching gap 22 and the notch slits 12b and 32b are aligned, the punching peripheral portion 24 is sealed and adhered with a margin. The conductive base material 20 and the rubber elastic sheet pieces 10B and 30B are overlapped and joined with an adhesive so as to cover the elastic elastic sheet 1 to obtain the elastic elastic sheet 1.

_{The punched hole 23a, in which both corners 23 Lc} on one end side in the longitudinal direction have a large radius and both corners 23 _Rc on the other end side have a small radius, can be formed by a laser machining method or a photolithography technique. Can be formed.

Further, as the conductive base material 20, instead of using Cu sputtered polyimide, a flexible support having a copper film may be etched and formed. A conductive support containing a punch hole 23a, a punch gap 22, and a cross-linking neck 25 is coated with a conductive ink containing a carbon paste to form a conductive inorganic substance-containing conductive film layer such as a conductive ink film layer. An organic conductive ink may be applied to form an organic conductive layer.

An example of joining the conductive base material 20 and the rubber elastic sheet pieces 10B and 30B with an adhesive has been shown, but as another manufacturing method, the conductive base material 20 having the punched holes 23a, the punched gaps 22, and the crosslinked neck 25 formed is After laminating the rubber elastic sheet pieces 10B and 30B of the small pieces of silicone rubber sheet that are larger by the margin, the through slits 13b and 33b smaller than the punching holes 23 are aligned with the positions of the punching holes 23a in the punching peripheral edge portion 24. The elastic elastic sheet 1 may be obtained by cutting the notch slits 12b and 32b smaller than the punching gap 22 according to the position of the punching gap 22 between the punching peripheral portions 24.

As yet another manufacturing method, a small piece of silicone rubber sheet to be a rubber elastic sheet piece 10B or 30B is bonded to any one of the punched holes 23a, the punching gap 22, and the conductive base material 20 on which the crosslinked neck 25 is formed with an adhesive. Then, the cured resin component composition of silicone rubber is applied, sprayed, and immersed on the other surface of the conductive base material 20 to form the other rubber elastic sheet piece 30B or 10B, and then the peripheral edge is removed in the same manner as described above. The through slits 13b and 33b are cut according to the position of the punch hole 23 in the portion 24, and the cut slits 12 and 32 are cut according to the position of the punch gap 22 to obtain the elastic elastic sheet 1. May be good.

As yet another manufacturing method, a rubber elastic sheet piece is formed by applying, spraying, and immersing a cured resin component composition of silicone rubber on both surfaces of a conductive base material 20 having a punched hole 23a, a punching gap 22, and a crosslinked neck 25. After forming 10B and 30B at once, the through slits 13b and 33b are aligned with the positions of the punching holes 23 in the punching peripheral portion 24, and the cut slits 12b and 32b are aligned with the positions of the punching gap 22 in the same manner as described above. May be cut to obtain the elastic elastic sheet 1.

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

The stretchable elastic sheet 1 serving as the stretchable conductive wiring module is used as a removable, disposable and clean wearable device by stacking the stretchable elastic sheet 1 in multiple layers and / or arranging them in series and / or in parallel. Is possible. The elastic elastic sheet 1 can be widely used for measuring the myoelectric potential of small muscles such as facial muscles, palm muscles, and large leg muscles. The elastic elastic sheet 1 has 1 to 4 sets of 2 to 8 electrodes as a pair of both electrodes, and can be used for myoelectric potential measurement and three-dimensional myoelectric potential measurement at various parts of living muscles. Available.

The stretchable elastic sheet 1 serving as a stretchable conductive wiring module measures the myoelectric potential in rehabilitation to inspect the recovery state, inspects the degree of progression of a muscle disease called myopathy, and inspects the athletic ability of an athlete. Used to do. In addition, 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 craftsman's skill as technical data for posterity.

The stretchable elastic sheet 1 serving as the stretchable conductive wiring module arranges exposed terminals only at necessary locations and seals the rest to maintain insulation, does not detect unnecessary noise, and has a desired potential. Not only can it be selectively detected, but it can also maintain its electric characteristics even if it expands and contracts repeatedly.

The following shows the results of preparing an elastic elastic sheet to which the present invention is applied (see FIG. 8) and an elastic elastic sheet to which the present invention is not applied, evaluating the performance, and comparing them.

(Example 1)
REMI-FS (manufactured by Kitagawa Industries Co., Ltd.) was used as the conductive base material 20. As the rubber elastic sheet pieces 10 and 30, a silicone rubber sheet having a thickness of 0.2 mm was used. The obtained conductive base material 20 and rubber elastic sheet pieces 10B and 30B are laser-processed into the shapes shown in FIG. 1, and then a silicone-based adhesive (trade name: Super X Gold; manufactured by Cemedine Co., Ltd.) is applied to the conductive base material 20. Was thinly applied, sandwiched between rubber elastic sheet pieces 10B and 30B, and adhered.
As a result, as shown in FIG. 8, a flexible support made of polyimide having a thickness of 200 μm, a length of rubber elastic sheet pieces 10B / 30B made of silicone rubber in the longitudinal direction is 42 mm, and a thickness of 25 μm. The length of the conductive base material 20 composed of 20B and the conductive layer 20A attached on it is 42 mm, the width of the rubber elastic sheet pieces 10B / 30B is 12 mm in the width direction perpendicular to the length, and the width of the conductive base material 20 is A test piece of a stretchable elastic sheet 1 having a margin of 10 mm and a margin of 1 mm each was obtained. The conductive base material 20 has a minimum wiring width of 0.75 mm at the punched peripheral edge portion 24, a length of 8.5 mm in the longitudinal direction of the punched hole 23, and a longitudinal direction of the punching gap 22 between the punched peripheral edge portions 24. The length is 3.5 mm, the length in the width direction of the bridge neck is 2 mm, and the repeating length of the punched peripheral edge portion 24 is 22 mm between the ends 21 and 26 10 mm from both ends in the longitudinal direction. Each unit has units, and each unit has a large radius (radius of curvature R: 0.3 to 0.5 mm) on both _{corners 23 Lc} of the punched hole 23 on one end side in the longitudinal direction, and both corners 23 on the other end side. _An elastic elastic sheet 1 having a small radius of radius Rc (radius of curvature R: 0.2 mm) was manufactured.

(Comparative Example 1)
_{Elasticity as in Example 1 except that both corners 23 Lc} on one end side in the longitudinal direction _{and both corners 23 Rc} on the other end side have the same radius (radius of curvature R: 0.2 mm). The elastic sheet 1 was manufactured.

(Performance test 1: Evaluation of normal deformation / abnormal deformation number during stretching until fracture, elongation at fracture, stress at fracture)
When the test piece of the elastic elastic sheet 1 obtained in Example 1 and Comparative Example 1 was stretched at n = 3 while being pulled from both ends sandwiched at a speed of 0.1 mm / sec until it broke. The number of units of normal deformation (normal direction) / abnormal deformation (reverse direction) in each of the 7 units, the elongation rate at break calculated with no stretching as 0%, and the stress at break were measured. The results are summarized in Table 1.

(Performance test 2: Evaluation of durability by repeating 50% stretching)
The test piece of the elastic elastic sheet 1 obtained in Example 1 and Comparative Example 1 was repeatedly stretched to 50% with no stretching as 0% at a speed of 0.1 mm / sec from both ends of the sandwich, and the resistance value was increased. The number of stretching repetitions from the initial value to a change of 10% or more was measured. The results are summarized in Table 1.

As is clear from Table 1, the elastic elastic sheet 1 having an asymmetric punched hole 23 in the first embodiment of the present invention has good durability without forming a unit extending in an abnormal deformation direction. The stretchable elastic sheet 1 having a symmetrical punched hole 23 in Comparative Example 1 which was not applied was stretched while being deformed in the opposite direction, and was inferior in durability.

(Example 2)
In the asymmetrical portion, both corners on one end side of the bridge neck 25 in the longitudinal direction have a large radius (radius of curvature R: 0.3 to 0.5 mm), and both corners on the other end side have a small radius (radius of curvature R: 0). The elastic elastic sheet 1 was manufactured in the same manner as in Example 1 except that the thickness was set to .2 mm).

(Comparative Example 2)
The elastic elastic sheet 1 was manufactured in the same manner as in Example 2 except that both angles of one end side and the other end side of the crosslinked neck 25 were the same radius (radius of curvature R: 0.2 mm).

The performance tests 1 and 2 described above were carried out for Example 2 and Comparative Example 2. The results are summarized in Table 2.

As is clear from Table 2, the elastic elastic sheet 1 in which the crosslinked neck 25 is asymmetrical in the second embodiment of the present invention does not generate a unit extending in an abnormal deformation direction, has a large breaking elongation, and has good durability. On the other hand, the elastic elastic sheet 1 having a symmetrical crosslinked neck 25 in Comparative Example 1 to which the invention was not applied stretched while being deformed in the opposite direction, and the breaking elongation was small and the durability was inferior.

(Example 3)
As the asymmetrical portion, the elastic elastic body is the same as in Example 1 except that the rubber elastic sheet pieces 10B (upper surface side) and 30B (lower surface side) have different thicknesses or hardnesses in the thickness direction. Sheet 1 was manufactured.
(Comparative Example 3)
The elastic elastic sheet 1 was manufactured in the same manner as in Example 3 except that the rubber elastic sheet pieces 10B (upper surface side) and 30B (lower surface side) were made of the same material.

The performance tests 1 and 2 described above were carried out for Example 3 and Comparative Example 3. The results are summarized in Table 2.

As is clear from Table 3, the asymmetric elastic elastic sheet 1 due to the difference in rubber thickness or rubber hardness between the rubber elastic sheet pieces 10B (upper surface side) and 30B (lower surface side) in Example 3 of the present invention. Does not generate a unit extending in an abnormal deformation direction and has good durability, whereas the rubber of the rubber elastic sheet pieces 10B (upper surface side) and 30B (lower surface side) in Comparative Example 1 to which the invention is not applied is applied. The symmetric elastic elastic sheet 1 having the same thickness or rubber hardness stretched while being deformed in the opposite direction, and was inferior in durability.

Next, the elastic elastic sheet to which the present invention is applied consists of only the conductive base material 20 which is a conductive rubber, and the elastic elastic sheet which does not use the rubber elastic sheet pieces 10B and 30B, and the elastic elastic sheet to which the present invention is not applied. The results of preparing a stretchable elastic sheet (see FIG. 13), evaluating the performance, and comparing the performance are shown. Same as in Example 1 except that the through slit and / or through hole, the notch slit and / or the notch hole are provided by laser machining, and the size thereof is shown in the figure. , A stretchable elastic sheet was prepared.

(Examples 4 (1) to (3) and Comparative Examples 4 (1) to (3))
The outline of the outer shape of the elastic elastic sheet 1 made of only the conductive base material 20 is as shown in FIG. 13 (a). Comparative Examples 4 (1) to (3) are symmetrical, and the corners of the punched holes 23a have the same radius on one side and the other side of the drawing direction D (FIGS. 13 (b) to 13 (b)). d)). Examples 4 (1) to (3) are asymmetrical, and the corners of the punched holes 23a have different radiuses on one side and the other side of the drawing direction D (FIGS. 13 (e) to 13 (e) of FIG. g)).

(Performance test 3: Deformation confirmation test)
Each 12 samples of the stretchable elastic sheet, pulling the stretching direction D of about 12 mm / sec, what all the units U ₁ · U ₂ ··· is inclined only in the same direction as the normal variations, unit U ₁ · Table 4 shows the results of observing one or more of U ₂ ... Tilt in the opposite direction as abnormal deformation and measuring the respective numbers.

(Performance test 4: Expansion and contraction repetition durability test)
The stretchable elastic sheet 1 is pulled at 150 mm / sec until it is stretched by 50% in the stretching direction D, and then the stretchable elastic sheet 1 is repeatedly stretched and contracted to be released at the same speed. The resistance value was confirmed, and the test was conducted until the resistance value became worse than the initial value by 10% or more. The results are shown in Table 4.

(Performance test 5: Peel test)
The stretchable elastic sheet 1 was pulled at 50 mm / min, and the elongation rate and the stress at break were measured. The results are shown in Table 4.

As is clear from Table 4, the elastic elastic sheet having different radii of curvature at each angle on one side and the other side of the drawing direction D in the punched hole 23a as in Examples 4 (1) to (3) is Even if it is pulled, only normal deformation occurs. On the other hand, the elastic elastic sheets of Comparative Examples 4 (1) to (3) having the same radius of curvature had a majority of abnormal deformations, and were inferior in the expansion and contraction repeated durability test and the peel test.

(Examples 5 (1) to (2) and Comparative Example 5)
The outline of the outer shape of the elastic elastic sheet 1 made of only the conductive base material 20 is as shown in FIG. 13 (a). Comparative Example 5 is symmetrical, and the corners of the cross-linking neck 25 have the same radius on one side and the other side in the stretching direction D (FIG. 13 (h)). Examples 5 (1) and 5 (2) are asymmetrical, and the corners of the cross-linking neck 25 have different radiuses on one side and the other side in the stretching direction D (FIGS. 13 (i) to 13 (i) to FIG. j)). Table 5 shows the results of the same evaluations as in the performance tests 3 to 5.

As is clear from Table 5, the elastic elastic sheet having different radii of curvature at each angle on one side and the other side of the stretching direction D in the crosslinked neck 25 as in Examples 5 (1) to (2) is Even if it is pulled, only normal deformation occurs. On the other hand, the elastic elastic sheet of Comparative Example 5 having the same radius of curvature had a half of the abnormal deformation rate, and was inferior in the expansion / contraction repetition durability test and the peel test.

(Examples 6 (1) to (6))
The outline of the outer shape of the elastic elastic sheet 1 made of only the conductive base material 20 is as shown in FIG. 13 (a). Examples 6 (1) to (6) are asymmetrical, in which the punched holes 23a have different distances from the adjacent punching gaps 22 (FIG. 6 (k)), and the punched holes 23a are asymmetrical polygons. (Figs. (L) to (m) in the figure), and the slit 23b instead of the hole 23a has an asymmetric arc shape or a key bracket shape (Fig. (N) to (o)). Table 6 shows the results of the same evaluations as in the performance tests 3 to 5.

As is clear from Table 5, as in Examples 6 (1) to (6), the elastic elastic sheet asymmetrical between one side and the other side of the drawing direction D in the punching hole 23a or the punching slit 23b is pulled. Only causes normal deformation.

The elastic elastic sheet of the present invention is flexible and has sufficient elasticity, can be stretched while tilting in only one direction, does not cause a decrease in elasticity due to repeated expansion and contraction, and has high insulating properties. However, since it has excellent durability, it is useful as a material for medical use, examination, inspection, and packaging that requires expansion and contraction, and as a wiring material for elastic conductive wiring modules.

The stretchable elastic sheet of the present invention is used in a stretchable conductive wiring module, and is used for flexible devices such as wearable devices and flexible substrates that require stretchable wiring, wiring members for robots, electrodes, and the like.

1 is a rubber elastic sheet, 10A / 10B is a rubber elastic sheet piece, 11 is an end, 12a is a notch hole, 12b is a notch slit, 12 _Lc / 12 _Rc is a corner with a radius, and 13a is a through hole. , 13b is a through slit, 13 _Lc and 13 _Rc are corners with radius, 14 is a joint between cuts, 15 is a peripheral connection, 16 is an end, 20 is a conductive base material, and 20A is a flexible conductive layer. 20B is a flexible support, 21 is an end, 22 is a punching gap, 23, 23a, 23b, 23b ₁ is a punching hole, 23 _Lc , 23 _Rc , 23a _Lc , 23a _Rc , 23b _Lc , 23b _Rc is a radius. Corners, 24, 24a, 24b are punched peripheral parts, 25, 25a, 25b are cross-linked necks, 26 are ends, 28a, 28b are dummy patterns, 29a are electrical connection connectors, 29b are connection cords, 30B are rubber elastic sheets. piece, 31 ends, 32a is Setsukomiana, 32b are cut slits, 33a are through holes, 33b are through-slit, 36 is the end _{portion, U} 1 · U 2 ··· is repeating structural units, D is stretched The directions, B ₁ , B _2, ... Are the basic axes.

Claims (18)

A repeating structure unit provided with a through slit and / or a through hole and a notch slit and / or a notch hole in a rubber elastic sheet piece is arranged in series along the stretching direction and / or in parallel with the series. It is an elastic elastic sheet that has multiple sheets side by side.
A stretchable elastic sheet, characterized in that each of the repeating structure units is asymmetric so as to be inclined and stretched in the same direction. A plurality of the through slits and / or a plurality of the through holes arranged in series and / or in parallel with the series while intersecting the stretching direction of the rectangular rubber elastic sheet piece.
A row of peripheral connection portions including a plurality of peripheral edge connection portions connected between the through slit and / or the through hole and the long side of the rubber elastic sheet piece.
A plurality of the cut slits and / or a plurality of cut slits provided alternately with the plurality of through slits and / or the plurality of through holes, and cut while facing each other inward from the long sides of both of the rubber elastic sheet pieces. With the notch hole
It has the notch slits facing each other and / or a plurality of notch connecting portions connected between the notch holes.
The through slit and / or the through hole, the peripheral edge connecting portion, the notch slit and / or the notch hole, the intercut connecting portion, the rubber elastic sheet piece, and the elastic elastic sheet have the same orientation. The elastic elastic sheet according to claim 1, wherein at least one of them is made asymmetrical in the repeating structure unit so as to be inclined and stretched. The through slit and / or the through hole, the peripheral edge connecting portion, the notch slit and / or the notch hole, the intercut connecting portion, the rubber elastic sheet piece, and the elastic elastic sheet are the same. The claim is characterized in that it is asymmetrical depending on the shape, thickness, material, and / or hardness selected from at least any shape, structure, position, range, size, width, length, and distance. 2. The elastic elastic sheet according to 2. At least one of the through slit and / or the through hole, the peripheral edge connecting portion, the notch slit and / or the notch hole, and the intercut connecting portion is the stretching direction for each of the repeating structure units. The elastic elastic sheet according to any one of claims 2 to 3, wherein the elastic sheet is asymmetrical with respect to a base axis perpendicular to the base axis. At least one of the through hole, the peripheral edge connecting portion, the notch hole, and the inter-cutting connecting portion is rounded at each corner, and the corners in the extending direction have different radiuses. The stretchable elastic sheet according to any one of claims 2 to 4, wherein the repeating structure unit is made asymmetrical. By setting one to 1: 0 to 1: 0.01 and the other to 1: 0.03 to 1: 0.05 with respect to the width of the rubber elastic sheet piece, and / or one of the different radiuss. The stretchable elastic sheet according to claim 5, wherein the elastic elastic sheet has a radius of curvature of 0 to 0.2 mm and the other has a radius of curvature of 0.6 to 1 mm to make the repeating structure unit asymmetric. Since the rubber elastic sheet piece is a laminate of a plurality of rubber elastic film pieces having different materials, thickness and / or hardness, the rubber elastic sheet piece is bent and stretched in the same direction while being curved. The elastic elastic sheet according to any one of claims 1 to 6, wherein the elastic elastic sheet is made asymmetrical. A through slit and / or a through hole and a notch slit and / or a notch hole are provided in the rubber elastic sheet piece, and a flexible conductive base material having a conductive layer is provided with a conductive layer in the direction of energization of the conductive layer. A plurality of punching peripheral portions that are arranged in series and / or in parallel along the punching slit and / or a punching slit that leads to the through hole and / or a punching peripheral portion that penetrates through the punching hole, and leads to the notch slit and / or the notch hole. A plurality of cross-linking necks that are connected so as to be energized while being partitioned by a drawing gap are provided in series along the stretching direction and / or are arranged in series and in parallel.
An elastic elastic sheet in which at least a part of the conductive base material is sealed and coated with the rubber elastic sheet piece without exposing it.
A stretchable elastic sheet, characterized in that each of the repeating structure units is asymmetric so as to be inclined and stretched in the same direction. A plurality of the through slits and / or a plurality of the through holes arranged in series and / or in parallel with the series while intersecting the stretching direction of the rectangular rubber elastic sheet piece.
A plurality of peripheral edge connecting portions connected between the through slit and / or the through hole and the long side of the rubber elastic sheet piece, and
A plurality of the cut slits and / or a plurality of cut slits provided alternately with the plurality of through slits and / or the plurality of through holes, and cut while facing each other inward from the long sides of both of the rubber elastic sheet pieces. With the notch hole
It has the notch slits facing each other and / or a plurality of notch connecting portions connected between the notch holes.
The through slit and / or the through hole, the peripheral connection portion, the notch slit and / or the notch hole, the intercut connection portion, the punch slit and / or the punch hole, the bridge neck, the conductivity. A claim characterized in that at least one of the base material, the rubber elastic sheet piece, and the elastic elastic sheet is made asymmetric in the repeating structure unit so that the elastic elastic sheet is inclined and stretched in the same direction. Item 8. The elastic elastic sheet according to Item 8. The through slit and / or the through hole, the peripheral connection portion, the notch slit and / or the notch hole, the intercut connection portion, the punch slit and / or the punch hole, the bridge neck, the conductivity. The shape, thickness, and material of which the base material, the rubber elastic sheet piece, and the elastic elastic sheet are selected from at least one of their shapes, structures, positions, ranges, sizes, widths, lengths, and distances. The elastic elastic sheet according to claim 9, wherein the elastic elastic sheet is made asymmetrical depending on the hardness and / or hardness. The conductive base material covers the punched peripheral edge portion and the crosslinked neck with the peripheral edge connecting portion and the inter-cutting connecting portion in the repeating structure unit, while covering the through slit and / or the through hole and the notch. Curved or bent so as not to overlap the slit and / or the notch hole, and at least one of the punched slit and / or the punched hole, the punched peripheral portion, and the cross-linking neck faces each other in the extending direction. The elastic elastic sheet according to any one of claims 8 to 10, wherein the elastic elastic sheet is asymmetrical due to having different radiuses. The different radiuss are such that one is 1: 0 to 1: 0.02 and the other is 1: 0.03 to 1: 0.05 with respect to the width of the conductive substrate, and / or one is curved. The elastic elastic sheet according to claim 11, wherein the elastic elastic sheet has an asymmetry in the repeating structure unit by having a radius of 0 to 0.2 mm and a radius of curvature of 0.4 to 1 mm on the other side. A plurality of dummy patterns that are not in contact with the conductive substrate and are not conductive in the base axis perpendicular to the stretching direction are connected to the periphery in the rubber elastic sheet piece while being asymmetrical in the repeating structure unit. The stretchable elastic sheet according to any one of claims 8 to 12, wherein the elastic elastic sheet is provided in contact with at least one of the portions and the connecting portion between the cuts. The conductive substrate and the dummy pattern are characterized in that they are selected from an etching layer, a printed layer, a metal film layer, an organic conductive film layer, a conductive inorganic substance-containing conductive film layer, and a conductive rubber layer. The elastic elastic sheet according to claim 13. Since the rubber elastic sheet piece is a laminate of a plurality of rubber elastic film pieces having different materials, thickness and / or hardness, the rubber elastic sheet piece is bent and stretched in the same direction while being curved. The elastic elastic sheet according to any one of claims 8 to 14, wherein the elastic elastic sheet is made asymmetrical. By having the conductive base material having a flexible support and a conductive layer which is a metal layer attached on the flexible support, and / or the rubber elastic sheet piece sandwiches the conductive base material, the material and thickness. And / or a laminate of a plurality of elastic elastic film pieces having the same or different hardness, and the conductive base material has the shape, the structure, the position, the range, the size, the width, the length, and the above. The stretchable elastic sheet according to claim 9, wherein the elastic elastic sheet is made asymmetric by having the shape, the thickness, the material and / or the hardness selected from the distance. The elastic elastic sheet according to any one of claims 1 to 7, wherein the rubber elastic sheet piece is a conductive rubber. The elastic elasticity according to any one of claims 1 to 17, which is selected from medical use, examination use, inspection use, packaging use, in-vehicle use, semiconductor use, robot use, and sports use. Body sheet.

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