Stretchable Devices

Abstract

To provide a stretchable device having stretchability and flexibility.SOLUTION: A stretchable device 100 includes: a flexible substrate 20 and a stretchable member 10 which is partially integrated with the flexible substrate and has elasticity. The flexible substrate includes a first region having a bent form in at least a first direction as a first form, and having the form extending in one direction as a second form. The first region can be changed into the bent form and the extended form by means of the stretchable member.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a stretchable device. [Background technology]

[0002] Stretchable devices in which stretchable wiring is mounted on a stretchable substrate have been known for some time. These stretchable devices can be used by being attached to a living body (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-143763 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, it is considered that there is an increasing need for a stretchable device that can be attached to a living body and has a more compact size. In order to meet such a need, a stretchable device that combines flexibility in addition to conventional stretchability is desired.

[0005] Therefore, an object of the present invention is to provide a stretchable device that is both stretchable and flexible. [Means for solving the problem]

[0006] In order to achieve the above object, in one embodiment of the present invention, A flexible substrate and a stretchable member that is partially integrated with the flexible substrate and has elasticity, the flexible substrate includes a first region having a first configuration that is bent in at least a first direction and a second configuration that is extended in one direction; A stretchable device is provided, wherein the first region is changeable between the deflected configuration and the extended configuration by the elastic member. Effect of the Invention

[0007] A stretchable device according to an embodiment of the present invention can be provided with stretchability and flexibility. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view illustrating a stretchable device according to a first embodiment of the present invention in an initial state. [Diagram 2] FIG. 2 is a cross-sectional view that illustrates a schematic diagram of a stretchable device in a stretched state according to a first embodiment of the present invention. [Diagram 3] FIG. 3 is a cross-sectional view illustrating a stretchable device according to a second embodiment of the present invention in an initial state. [Figure 4] FIG. 4 is a cross-sectional view illustrating a stretchable device according to a third embodiment of the present invention in an initial state. [Diagram 5] FIG. 5 is a cross-sectional view illustrating a stretchable device according to a fourth embodiment of the present invention in an initial state. [Figure 6] FIG. 6 is a cross-sectional view illustrating a stretchable device according to a fifth embodiment of the present invention in an initial state. [Figure 7A] FIG. 7A is a plan view illustrating a stretchable device according to a sixth embodiment of the present invention in an initial state. [Figure 7B] FIG. 7B is a cross-sectional view illustrating a stretchable device according to the sixth embodiment of the present invention in an initial state, taken along line II-II′ in FIG. 7A. [Figure 7C] FIG. 7C is a cross-sectional view illustrating a stretchable device according to a sixth embodiment of the present invention in an initial state, taken along line segment II′ in FIG. 7A. [Figure 8] FIG. 8 is a plan view illustrating a stretchable device in a stretched state according to a sixth embodiment of the present invention. [Figure 9A] FIG. 9A is a plan view illustrating a stretchable device according to a seventh embodiment of the present invention in an initial state. [Figure 9B]FIG. 9B is a cross-sectional view illustrating a stretchable device according to the seventh embodiment of the present invention in an initial state, taken along line segment II' in FIG. 9A. [Figure 9C] FIG. 9C is a cross-sectional view illustrating a stretchable device according to the seventh embodiment of the present invention in an initial state, taken along line II-II′ in FIG. 9A. [Figure 10A] FIG. 10A is a plan view illustrating a stretchable device in a stretched state according to an eighth embodiment of the present invention. [Figure 10B] FIG. 10B is an enlarged plan view illustrating a schematic diagram of a first region and a peripheral region of the flexible substrate of the stretchable device in FIG. 10A in a stretched state. [Figure 10C] FIG. 10C is an enlarged cross-sectional view illustrating a schematic diagram of a first region and its peripheral region of the flexible substrate of the stretchable device in an initial state. [Figure 11] FIG. 11 is an enlarged cross-sectional view that illustrates a schematic diagram of another configuration of the first region of the flexible substrate of the stretchable device in the initial state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. In each embodiment, the differences from the previous embodiments will be mainly described. In particular, the same action and effect due to the same configuration will not be mentioned in each embodiment. Among the components in the following embodiments, those not described in the independent claims will be described as optional components. In addition, the size and size ratio of the components shown in the drawings are not necessarily strict. In addition, in each drawing, the same reference numerals are given to substantially the same configuration, and duplicated descriptions may be omitted or simplified. Note that the stretchable device in the initial state in the following embodiments and drawings refers to the case where the device has a flexible substrate of the first form described later, and the stretchable device in the extended state refers to the case where the device has a flexible substrate of the second form described later.

[0010] [First embodiment] Hereinafter, the configuration of the stretchable device 100 according to the first embodiment will be described with reference to FIGS.

[0011] Fig. 1 is a cross-sectional view illustrating a stretchable device according to a first embodiment of the present invention in an initial state, and Fig. 2 is a cross-sectional view illustrating a stretchable device according to a first embodiment of the present invention in an extended state.

[0012] The stretchable device 100 according to the first embodiment of the present invention comprises a stretchable substrate 10, a flexible substrate 20, an adhesive layer 30 that bonds the two substrates, and electronic components 40 and 50. Note that the term "above" used in this specification includes a state of being above and separated from an element, i.e., being located above an element via another object, a state of being located above an element with a gap therebetween, and a state of being located directly above and in contact with an element.

[0013] The main components of the stretchable device 100 will be specifically described below, followed by a description of the characteristic features of the first embodiment.

[0014] (Stretchable base material 10) The stretchable substrate 10 has elasticity and is partially bonded to the flexible substrate 20 via the adhesive layer 30. Note that the adhesive layer 30 is not an essential component, and the stretchable substrate 10 may be partially bonded directly to the flexible substrate 20.

[0015] The stretchable substrate 10 is a sheet-like or film-like stretchable substrate, and is made of, for example, a resin material having stretchability. Examples of the resin material of the stretchable substrate 10 include thermoplastic polyurethane (TPU), polyethylene (PE), polystyrene (PS), and polyethylene terephthalate (PET).

[0016] The thickness of the stretchable substrate 10 is not particularly limited, but is preferably 100 μm or less, more preferably 50 μm or less, from the viewpoint of not inhibiting the stretching of the surface of the living body when attached to the living body. Also, the thickness of the stretchable substrate 10 is preferably 20 μm or more, from the viewpoint of ensuring a predetermined strength.

[0017] (flexible substrate 20) The flexible substrate 20 is a substrate having flexibility. The flexible substrate 20 may be made of at least one material selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether ether ketone (PEEK), polyimide (PI), liquid crystal polymer, etc. It is preferable to use a substrate made of polyimide that has flexibility as well as bendability.

[0018] The thickness of the flexible substrate 20 is not particularly limited, but is preferably 100 μm or less from the viewpoint of flexibility, and more preferably 50 μm or less. The thickness of the stretchable substrate 10 is preferably 20 μm or more from the viewpoint of ensuring a predetermined strength.

[0019] (Adhesive layer 30) The adhesive layer 30 is configured to be capable of partially adhering the stretchable substrate 10 and the flexible substrate 20. Although not particularly limited, the adhesive layer 30 may be composed of a pressure-sensitive adhesive or the like. As the pressure-sensitive adhesive, rubber-based, acrylic-based, and silicone-based adhesives can be used. When a pressure-sensitive adhesive is used, it is possible to adhere to the mating member at a relatively low temperature, so that it is possible to prevent the stretchable substrate 10 and the flexible substrate 20 from being altered or distorted by using excessive heat or UV energy.

[0020] (Electronic Components 40, 50) The electronic components 40 and 50 may be disposed on the main surface of the flexible substrate 20. In this embodiment, the electronic components 40 and 50 may be electrically connected by wiring or the like (not shown), or may function as independent electronic components without being electrically connected. Examples of such electronic components include a temperature sensor, an acceleration sensor, a coil that irradiates electromagnetic waves into the body, an ultrasonic oscillator that irradiates ultrasonic waves into the body, an LED for measuring SpO2 (transcutaneous arterial oxygen saturation), a light receiving sensor, a battery that serves as a power source for operating the circuit, and a BLE module for wirelessly communicating data.

[0021] (Characteristic parts of the first embodiment) Based on the above configuration, the first embodiment is characterized in that the flexible substrate 20 includes a first region having an initial first shape that is bent in at least a first direction and an extended shape in one direction as a second shape (see FIG. 1). The first region 21 can have a curved or bent shape as the bent shape. Preferably, the first region 21 can have a bellows structure. Such a shape can form a gap on the inner main surface side of the first region 21.

[0022] In one example, in an initial state, in a cross-sectional view, the first region 21 of the flexible substrate 20 has two opposing side portions 25 and a top surface portion 26 continuous therewith. Without being limited thereto, the first region 21 can also have a form in which the ends of the two opposing side portions 25 are continuous with each other without substantially having a top surface portion (see FIG. 11).

[0023] Moreover, the flexible substrate 20 may further include a second region 22 that is continuous with the first region 21. The second region 22 is disposed on at least one side of the first region 21 and has a configuration that extends in one direction. From another perspective, the second region 22 forms a bottom surface portion of the flexible substrate 20 when in a bent configuration.

[0024] In one example, the second region 22 may be disposed on both sides of the first region 21. In this case, the stretchable substrate 10 may have a form extending in one direction from the second region 22 on one side, through the first region 21, to the second region 22 on the other side.

[0025] In this embodiment, as described above, since a void is formed on the inner main surface side of the first region 21, the electronic components can be arranged on the main surface of the flexible substrate 20 in addition to, or instead of, the main surface of the stretchable substrate 10 located in the first region 21.

[0026] As described above, the stretchable substrate 10 has an elastic function, and is partially adhered or joined to the flexible substrate 20. This means that the stretchable substrate 10 having elasticity can be partially integrated with the flexible substrate 20.

[0027] By adopting such a configuration, the flexible substrate 20, particularly the first region 21 thereof, is an elastic substrate that can be changed or freely changed between the above-mentioned bent form and a form extending in one direction by the elastic member 10. In other words, the elastic substrate 10 can expand or contract according to the form of the first region 21 of the flexible substrate 20.

[0028] Specifically, as described above, in the initial state, the first region 21 of the flexible substrate 20 may have a bent shape, specifically a curved or bent shape (see FIG. 1). In this case, the stretchable substrate 10 may be in a contracted state corresponding to the bent shape of the first region 21 of the flexible substrate 20. Although not particularly limited, the angle θ between the first region 21 and the second region 22 of the flexible substrate 20 in the bent shape in a cross-sectional view may be 90 degrees or more and 135 degrees or less.

[0029] When a tensile force acts on the flexible substrate 20, the first region 21 can change from the bent form to an extended form (see FIG. 2). In this case, the stretchable substrate 10 can be in an elongated state corresponding to the extended form of the first region 21 of the flexible substrate 20. When the first region 21 is in the extended form, the first region 21 and the second region 22 of the flexible substrate 20 can be positioned on the same plane.

[0030] Since the stretchable substrate 10 has elastic properties as described above, an elastic force acts on the stretched stretchable substrate 10 to return it to its original shape. The action of such elastic force allows the first region 21 of the flexible substrate 20 to contract from the above-mentioned extension in one direction to its original bent shape.

[0031] From the above, according to the present embodiment, the stretchable device 100 can have both properties of stretchability and flexibility as a whole. Therefore, it is possible to provide the living body 200 with a more compact size of the stretchable device 100.

[0032] From the viewpoint of reducing the height of the stretchable device, it is preferable that the height of the electronic components 40, 50 is lower than the maximum height of the first region 21 of the flexible substrate 20 in the bent form. As an example, the maximum height of the first region 21 in the bent form may be 2 mm or more.

[0033] In the following, the characteristic configurations of each embodiment will be mainly described. In order to avoid duplication of content, descriptions of configurations that are the same or substantially the same as those of the embodiments already described before the description of each embodiment will be omitted or omitted.

[0034] [Second embodiment] Hereinafter, the configuration of a stretchable device according to the second embodiment will be described with reference to Fig. 3. The second embodiment is different from the first embodiment (see Figs. 1 and 2) in that the stretchable device further includes wiring.

[0035] FIG. 3 is a cross-sectional view illustrating a stretchable device according to a second embodiment of the present invention in an initial state.

[0036] As shown in FIG. 3, the stretchable device 100A according to the second embodiment includes a stretchable base material 10, a flexible substrate 20, an adhesive layer 30 that bonds the two substrates together, electronic components 41 and 42, and wiring 60.

[0037] In the second embodiment, an elastic wiring 60 may be disposed on the main surfaces of a first region 21 and a second region 22 continuous therewith of the flexible substrate 20. In addition, the second regions 22 are positioned on both sides of the first region 21 of the flexible substrate 20, and electronic components 41, 42 may be disposed on the main surfaces of the second regions 22.

[0038] In this embodiment, one electronic component 41 and the other electronic component 42 can be electrically connected via the stretchable wiring 60 provided on the main surface of the first region 21. By utilizing the structure of the first region 21 of the flexible substrate 20, it is possible to efficiently electrically connect electronic components arranged apart from each other, without having to detour through other electrical paths.

[0039] In this specification, "stretchable wiring 60 arranged on the main surface of the first region 21 and the second region 22 of the flexible substrate 20" includes stretchable wiring in contact with the main surface of the flexible substrate 20, and stretchable wiring that is not in direct contact with the main surface of the flexible substrate 20 but is separated from the main surface via another member (e.g., a resin layer).

[0040] The elastic wiring 60 may contain conductive particles and resin. For example, the elastic wiring 60 may be a mixture of metal powder such as Ag, Cu, Ni, etc. as conductive particles and an elastomer resin such as silicone resin. The average particle size of the conductive particles is not particularly limited, but is preferably 0.01 μm or more and 10 μm or less. The conductive particles are preferably spherical in shape.

[0041] The thickness of the elastic wiring 60 is not particularly limited, but is preferably 100 μm or less, and more preferably 50 μm or less. The thickness of the elastic wiring 60 is preferably 0.01 μm or more. The line width of the elastic wiring 60 is not particularly limited, but is preferably 0.1 μm or more, and more preferably 10 mm or less. The shape and number of the elastic wiring 60 are not particularly limited.

[0042] A possible configuration of the stretchable device is one that includes a stretchable substrate, a meandering wiring pattern provided on the stretchable substrate, and electronic components mounted on the wiring pattern. The meandering wiring pattern can be positioned in a direction substantially parallel to the stretch direction of the stretchable substrate in a bent form.

[0043] In contrast, in the present embodiment, the flexible substrate 20 is disposed between the stretchable substrate 10 (corresponding to a stretchable member) and the stretchable wiring 60, and the first region 21 of the flexible substrate 20 can be positioned in a direction intersecting (approximately perpendicular to) the stretch direction of the stretchable substrate 10 in the bent form. In this respect, the configuration of the present embodiment can differ from the configuration described above.

[0044] [Third embodiment] Hereinafter, the configuration of a stretchable device according to the third embodiment will be described with reference to Fig. 4. The third embodiment differs from the first embodiment (see Figs. 1 and 2) in that the stretchable device includes a stretchable cushion body 10B instead of a stretchable base material.

[0045] FIG. 4 is a cross-sectional view illustrating a stretchable device according to a third embodiment of the present invention in an initial state.

[0046] 4, unlike the first embodiment, an elastic stretchable cushion body 10B can be configured partially integrally with the flexible substrate 20. By adopting such a configuration, the first region 21 of the flexible substrate 20 can be changed or freely changed between a deflected form and a form extending in one direction by the stretchable cushion body 10B. In other words, the stretchable cushion body 10B can expand or contract according to the form of the first region 21 of the flexible substrate 20.

[0047] In this specification, the stretchable substrate 10 (see FIG. 1, etc.) and the stretchable cushion body 10B are collectively referred to as the "stretchable member."

[0048] The location of the stretchable cushion body 10B is not particularly limited as long as it can expand and contract in response to both the above-mentioned deflected and extended forms of the first region 21 of the flexible substrate 20. For example, the stretchable cushion body 10B can be joined or adhered to two mutually opposing inner side surfaces 23, 24 of the first region 21 in the deflected form. The two inner side surfaces 23, 24 can be side surfaces extending in a direction intersecting with the one-way extension direction of the second region 22 of the flexible substrate 20.

[0049] 4 shows, as an example, a mode in which the elastic cushion body 10B connects the lower end sides of the inner surfaces 23, 24, but the cross-sectional size of the elastic cushion body 10B is not particularly limited as long as it is integrated with the first region 21. For example, if the elastic cushion body 10B is sufficiently soft, it can also come into contact with the top surface side of the first region 21, assuming that it is integrated with the first region 21. In other words, the elastic cushion body 10B can have approximately the same cross-sectional size as the cross-sectional size of a gap (which can also be referred to as an inner space) that can be formed on the inner main surface side of the first region 21.

[0050] Specifically, as described above, in the initial state, the first region 21 of the flexible substrate 20 may have a bent shape (see FIG. 4). In this case, the stretchable cushion body 10B may be in a contracted state corresponding to the bent shape of the first region 21.

[0051] When a tensile force acts on the flexible substrate 20, the first region 21 can change from a bent state to a state extending in one direction. In this case, the stretchable cushion body 10B can be in an extended state corresponding to the extended state of the first region 21 of the flexible substrate 20. Since the stretchable cushion body 10B has elastic properties, an elastic force acts on the extended stretchable cushion body 10B to return it to its original state. The action of this elastic force allows the first region 21 of the flexible substrate 20 to contract from the extended state in one direction to its original bent state.

[0052] From the above, in the third embodiment, as in the first embodiment, the stretchable device 100B can have both properties of stretchability and flexibility as a whole. Therefore, it is possible to provide the stretchable device 100B having a more compact size to the living body 200.

[0053] [Fourth embodiment] Hereinafter, the configuration of a stretchable device according to the fourth embodiment will be described with reference to Fig. 5. The fourth embodiment is a combination of the first embodiment (see Figs. 1 and 2) and the third embodiment (see Fig. 4).

[0054] FIG. 5 is a cross-sectional view illustrating a stretchable device according to a fourth embodiment of the present invention in an initial state.

[0055] As shown in FIG. 5, in the fourth embodiment, it is possible to combine the first embodiment (see FIG. 1 and FIG. 2) with the third embodiment (see FIG. 4). In this case, both the elastic stretchable base material 10 and the stretchable cushion body 10B can be partially integrated with the flexible substrate 20. Because of this configuration, the first region 21 of the flexible substrate 20 can be changed or freely changed between a deflected form and a form extending in one direction by both the stretchable base material 10 and the stretchable cushion body 10B. In other words, both the stretchable base material 10 and the stretchable cushion body 10B can expand or contract according to the form of the first region 21 of the flexible substrate 20.

[0056] Specifically, as described above, in the initial state, the first region 21 of the flexible substrate 20 may have a bent shape (see FIG. 5). In this case, both the stretchable base material 10 and the stretchable cushion body 10B may be in a contracted state corresponding to the bent shape of the first region 21.

[0057] When a tensile force acts on the flexible substrate 20, the first region 21 can change from a bent state to an extended state in one direction. In this case, both the stretchable substrate 10 and the stretchable cushion body 10B can be in an elongated state corresponding to the extended state of the first region 21 of the flexible substrate 20. Since both the stretchable substrate 10 and the stretchable cushion body 10B have elastic properties, the first region 21 of the flexible substrate 20 can contract more suitably from the extended state in one direction to the original bent state.

[0058] From the above, the fourth embodiment is more preferable than each of the first and third embodiments in that it can utilize the elastic forces of both the stretchable substrate 10 and the stretchable cushion body 10B.

[0059] In the fourth embodiment, since the stretchable substrate 10 has stretchability, the cushion body 10B may have a relatively small stretchability compared to the stretchable substrate 10. That is, in this embodiment, the cushion body 10B does not necessarily have to have stretchability. In this case, while the stretchable substrate 10 is stretchable in the left-right direction, the cushion body 10B may be soft and have only a repulsive force.

[0060] [Fifth embodiment] Hereinafter, the configuration of a stretchable device according to the fifth embodiment will be described with reference to Fig. 6. The fifth embodiment differs from the second embodiment (see Fig. 3) in that two stretchable substrates 10, 10D are used.

[0061] FIG. 6 is a cross-sectional view illustrating a stretchable device according to a fifth embodiment of the present invention in an initial state.

[0062] As shown in Fig. 6, the fifth embodiment is characterized in that two stretchable substrates (a first stretchable substrate 10DI and a second stretchable substrate 10DII) are used. In the fifth embodiment, the flexible substrate 20D has two first regions 21DX and 21DY and three second regions 22DX to 22DZ spaced apart at a predetermined interval. Electronic components 41 to 43 are disposed on each of the second regions. Stretchable wiring 60DX and 60DY are disposed between adjacent electronic components to ensure electrical connection.

[0063] The first stretchable substrate 10DI is connected to each of the second regions 22DX to 22DZ via an adhesive layer 30DI. In addition, the second stretchable substrate 10DII is connected to each of the first regions 21DX, 21DY via an adhesive layer 30DII.

[0064] However, without being limited thereto, only the second stretchable substrate 10DII may be connected to each of the first regions 21DX, 21DY via the adhesive layer 30DII. That is, in a case where the flexible substrate 20D has two main surfaces facing each other, a stretchable substrate may be disposed on at least one side of the two main surfaces of the flexible substrate 20D. Specifically, one or more stretchable substrates may be disposed on at least one side of the two main surfaces of the flexible substrate 20D.

[0065] By adopting such a configuration, the flexible substrate 20D can be arranged so as to be sandwiched between the two stretchable substrates 10DI and 10DII in a cross-sectional view. As a result, both of the two elastic stretchable substrates 10DI and 10DII can be partially integrated with the flexible substrate 20. Because of the adoption of such a configuration, the two first regions 21DX and 21DY of the flexible substrate 20 can be changed or freely changed between a bending form and a form extending in one direction by both of the two stretchable substrates 10DI and 10DII. In other words, both of the two stretchable substrates 10DI and 10DII can expand or contract according to the form of the two first regions 21DX and 21DY of the flexible substrate 20.

[0066] Specifically, in the initial state, the two first regions 21DX and 21DY of the flexible substrate 20D may have a bent shape (see FIG. 6). In this case, both of the two stretchable substrates 10DI and 10DII may be in a contracted state corresponding to the bent shapes of the two first regions 21DX and 21DY.

[0067] When a tensile force acts on the flexible substrate 20D, the two first regions 21DX, 21DY can change from a bent state to an extended state in one direction. In this case, both of the two stretchable substrates 10DI, 10DII can be in an elongated state corresponding to the extended state of the two first regions 21DX, 21DY of the flexible substrate 20D. Since both of the two stretchable substrates 10DI, 10DII have elastic properties, the two first regions 21DX, 21DY of the flexible substrate 20D can contract from the extended state in one direction to the original bent state more suitably.

[0068] From the above, the fifth embodiment is more preferable than the second embodiment in that it is possible to utilize the elastic forces of both of the two stretchable substrates 10DI and 10DII.

[0069] [Sixth embodiment] Hereinafter, the configuration of a stretchable device according to the sixth embodiment will be described with reference to Fig. 7A to Fig. 7C and Fig. 8. The sixth embodiment is different from the first embodiment (see Figs. 1 and 2) in that the stretchable device includes flexible substrates 20 arranged in multiple directions.

[0070] Fig. 7A is a plan view typically showing a stretchable device according to a sixth embodiment of the present invention in an initial state. Fig. 7B is a cross-sectional view typically showing a stretchable device according to a sixth embodiment of the present invention in an initial state taken along line II-II' in Fig. 7A. Fig. 7C is a cross-sectional view typically showing a stretchable device according to a sixth embodiment of the present invention in an initial state taken along line I-I' in Fig. 7A. Fig. 8 is a cross-sectional view typically showing a stretchable device according to a sixth embodiment of the present invention in an extended state.

[0071] In the sixth embodiment, as shown in Figures 7A to 7C and 8, two or more first regions may be arranged in a plan view. In this case, among the two or more first regions, one that can extend in a first direction (e.g., X direction) and one that can extend in a second direction (e.g., Y direction) may be arranged. In one example, a form may be adopted in which the extension direction of one first region 21EX and the extension direction of the other first region 21EY are orthogonal to each other.

[0072] Note that, without being limited to two directions, three or more first regions that can extend in multiple directions (three or more directions) may be arranged to intersect with each other. From the viewpoint of smoothly bending, extending, and contracting the first regions of flexible substrate 20E, it is preferable that, in a plan view, two or more first regions have a common intersection portion, and the intersection portion is opening portion 25E.

[0073] Furthermore, in a plan view, two or more first regions 21EX may be arranged in a first direction (for example, the X direction). In this case, the widths of one of the two or more first regions 21EX1, 21EX2 (or 21EY1, 21EY2) in the first direction may differ from each other. Specifically, the first regions 21EX1, 21EY1 are relatively wider than the first regions 21EX2, 21EY2. In other words, the first regions 21EX2, 21EY2 are relatively narrower than the first regions 21EX1, 21EY1.

[0074] The "width" here refers to the width along the X direction (corresponding to the first direction) when the first region, which can extend in either the X direction or the Y direction, extends.

[0075] According to this embodiment, it is preferable to arrange the skin of a living body, which has fine or complex movements such as the skin of a joint, opposite the first region having a relatively small width. This allows the stretchable member 10E integrated with the first region having a relatively small width to achieve small-pitch stretching in accordance with the movements of the skin of the joint.

[0076] On the other hand, it is preferable to place the skin of the living body, such as the skin of the forearm and upper arm, which does not move in a relatively small or complicated manner, opposite the first region having a relatively large width. This allows the stretchable member 10E integrated with the first region having a relatively large width to achieve a large-pitch stretch in accordance with the movement of the skin of the forearm and upper arm.

[0077] That is, by adjusting the width (corresponding to the bellows density) of the first region of the flexible substrate 20E, it is possible to adjust the corresponding amount of stretch of the stretchable member 10E. As a result, it is possible to provide a stretchable device 100E having different amounts of stretch and flexibility as a whole.

[0078] [Seventh embodiment] 9A to 9C, the configuration of a stretchable device according to the seventh embodiment will be described. The seventh embodiment is different from the first embodiment (see FIGS. 1 and 2) in that the stretchable device has a coil shape.

[0079] Fig. 9A is a plan view diagrammatically showing a stretchable device according to a seventh embodiment of the present invention in an initial state. Fig. 9B is a cross-sectional view diagrammatically showing a stretchable device according to a seventh embodiment of the present invention in an initial state taken along line segment II-II' in Fig. 9A. Fig. 9C is a cross-sectional view diagrammatically showing a stretchable device according to a seventh embodiment of the present invention in an initial state taken along line segment II-II' in Fig. 9A.

[0080] As shown in Figures 9A to 9C, in the seventh embodiment, a plurality of first regions 21F are arranged in a circular shape at a predetermined interval in a flexible substrate 20F, and a ferrite sheet 70F in the form of a quadrant (quadrant) may be arranged on a second region 22F located between two adjacent first regions 21F. By arranging the ferrite sheet 70F in this manner, it is possible to increase the magnetic permeability of the magnetic path in the stretchable device 100F in the coil form. In addition, a first region 21F2 is also provided in the input / output terminal portion of the stretchable device 100F in the coil form.

[0081] When a tensile force acts on the flexible substrate 20F, the first regions 21F, 21F2 may change from a bent state to an extended state in one direction. In this case, the stretchable substrate 10F may be in an elongated state corresponding to the extended state of each of the first regions 21F, 21F2 of the flexible substrate 20F.

[0082] Since the stretchable substrate 10F has elastic properties, an elastic force acts on the stretched stretchable substrate 10F to return it to its original shape. The action of such elastic force allows each of the first regions 21F, 21F2 of the flexible substrate 20F to contract from the extending shape in one direction to the original bent shape.

[0083] From the above, in the seventh embodiment, as in the first embodiment, the stretchable device 100F can have both properties of stretchability and flexibility as a whole. Therefore, it becomes possible to provide a stretchable device 100F having a more compact size to a living body.

[0084] [Eighth embodiment] Hereinafter, the configuration of a stretchable device according to the eighth embodiment will be described with reference to Fig. 10A to Fig. 10C. The eighth embodiment differs from the second embodiment (see Fig. 3) in that the stretchable device has stretchable coil wiring.

[0085] Fig. 10A is a plan view showing a stretchable device according to an eighth embodiment of the present invention in a stretched state. Fig. 10B is an enlarged plan view showing a first region and its peripheral region of the flexible substrate of the stretchable device in the stretched state of Fig. 10A. Fig. 10C is an enlarged cross-sectional view showing a first region and its peripheral region of the flexible substrate of the stretchable device in an initial state.

[0086] 10A to 10C, in the eighth embodiment, a stretchable device 100G includes a stretchable coil wiring 60G. Such a stretchable coil wiring 60G may be disposed on a flexible substrate 20G connected to a stretchable base material 10G. Specifically, the coil wiring 60G may be disposed on the main surfaces of both the first region 21G and the second region 22G.

[0087] In plan view, in the portion of the stretchable coil wiring 60G that overlaps with the first region 21G of the flexible substrate 20G, a slit 65G is provided that is partially formed inward from the outer edge in a direction perpendicular to the longitudinal extension direction of the wiring.

[0088] The two slits 65G face each other in a direction perpendicular to the longitudinal extension direction of the wiring. A plurality of slits 65G are arranged at predetermined intervals on the outer edge side along the longitudinal extension direction of the coil wiring 60G. In the area where the slits 65G are arranged, the coil wiring 60G may easily expand and contract.

[0089] In one example, in an initial state, the first region 21G of the flexible substrate 20G has a side surface portion 21G1 and a top surface portion 21G2 continuous therewith. In order to facilitate the stretchable device 100G as a whole to favorably provide both properties of stretchability and flexibility in a plan view, the side surface portion 21G1 and the top surface portion 21G2 can be configured to be located between slit portions 65G arranged at predetermined intervals along the longitudinal extension direction of the coil wiring 60G located on the upper side when stretched.

[0090] With the above configuration, when a tensile force acts on the flexible substrate 20G, the first regions 21G can change from a bent state to an extended state in one direction. In this case, the stretchable substrate 10G can be in an elongated state corresponding to the extended state of each of the first regions 21G of the flexible substrate 20G (see FIGS. 10A and 10B).

[0091] Since the stretchable base material 10G has elastic properties, an elastic force acts on the stretched stretchable base material 10G to return it to its original shape. The action of such elastic force allows each first region 21G of the flexible substrate 20G to contract from the shape extended in one direction to the original bent shape.

[0092] From the above, in the eighth embodiment, similarly to the second embodiment, even when the stretchable device 100G includes coil wiring, it can have both properties of stretchability and flexibility as a whole. Therefore, it becomes possible to provide a stretchable device 100G having a more compact size to a living body.

[0093] Note that each embodiment and modification is an example, and the present invention is not limited to each embodiment and modification. Also, each drawing is an example of components, and does not limit the shape. Also, partial replacement or combination of the configurations shown in different embodiments and modifications is possible.

[0094] For example, at least one of the wiring and electronic components described in the above embodiment can be disposed on at least one of the main surfaces of the first region and the second region of the flexible substrate, or on an elastic member.

[0095] The aspects of the stretchable device according to one embodiment of the present invention are as follows. <1> A flexible substrate and a stretchable member that is partially integrated with the flexible substrate and has elasticity, the flexible substrate includes a first region having a first configuration that is bent in at least a first direction and a second configuration that is extended in one direction; A stretchable device, wherein the first region is changeable between the bent configuration and the extended configuration by the stretchable member. <2> The elastic member expands or contracts depending on the configuration of the first region. <1> 2. The stretchable device according to claim 1 . <3> When the first region is in the extended form, the elastic member stretches and an elastic force acts on the stretched elastic member. <1> or <2> 2. The stretchable device according to claim 1 . <4> There is a partial bond or adhesion site between the flexible substrate and the stretchable member. <1> ~ <3> 2. The stretchable device according to any one of claims 1 to 11. <5> The flexible substrate has two main surfaces facing each other, and the stretchable member is disposed on at least one side of the two main surfaces. <1> ~ <4> 2. The stretchable device according to any one of claims 1 to 11. <6> The flexible substrate further includes a second region continuous with the first region, the second region being disposed on at least one side of the first region and extending in one direction. <1> ~ <5> 2. The stretchable device according to any one of claims 1 to 11. <7> At least one of the first region and the second region of the flexible substrate and the stretchable member are bonded or adhered to each other. <6> 2. The stretchable device according to claim 1 . <8> When the first region is in a bent state, a gap is formed on the inner main surface side of the first region. <1> ~ <7> 2. The stretchable device according to any one of claims 1 to 11. <9> In a plan view, two or more of the first regions are arranged, and the two or more first regions are capable of extending in a plurality of directions including the first direction. <1> ~ <7> 2. The stretchable device according to any one of claims 1 to 11. <10> The extending direction of one of the first regions is perpendicular to the extending direction of the other of the first regions. <9> 2. The stretchable device according to claim 1 . <11> In a plan view, the two or more first regions have a common intersection portion, and the intersection portion is an opening portion. <9> or <10> 2. The stretchable device according to claim 1 . <12> In a plan view, two or more of the first regions are arranged in the first direction, and one of the two or more first regions has a width in the first direction different from that of the other of the two or more first regions. <1> ~ <11> 2. The stretchable device according to any one of claims 1 to 11. <13> At least one of wiring and electronic components is disposed on at least one of the main surfaces of the first region and the second region of the flexible substrate, or on the stretchable member. <6> Subordinate to <7> ~ <12> 2. The stretchable device according to any one of claims 1 to 11. <14> the wiring is coil wiring, and the coil wiring is disposed on the main surfaces of both the first region and the second region; <13> 2. The stretchable device according to claim 1 . <15> The height of the electronic component is lower than the maximum height of the first region in the bent state. <13> or <14> 2. The stretchable device according to claim 1 . <16> The maximum height of the first region in the deflected state is 2 mm or more. <15> 2. The stretchable device according to claim 1 . <17> When the first region is in the extended configuration, the first region and the second region of the flexible substrate are positionable flush with each other. <6> Subordinate to <7> ~ <16> 2. The stretchable device according to any one of claims 1 to 11. <18> The first region has a bellows structure. <1> ~ <17> 2. The stretchable device according to any one of claims 1 to 11. <19> The elastic member has at least one of a film form and a cushion form. <1> ~ <18> 2. The stretchable device according to any one of claims 1 to 11. <20> In a cross-sectional view, an angle θ between the first region and the second region in a deflected state is 90 degrees or more and 135 degrees or less. <6> Subordinate to <7> ~ <19> 2. The stretchable device according to any one of claims 1 to 11. [Explanation of symbols]

[0096] 200 Living body skin, etc. 100, 100A~100H Elastic device 10, 10DI, 10DII, 10E, 10F, 10G Elastic material 10B Elastic cushion body 20, 20D, 20E, 20F, 20G Flexible Board 21, 21DX, 21DY, 21EX, 21EX1, 21EX2, 21EY, 21EY1, 21EY2, 21F, 21F2, 21G First area of ​​flexible board 21G1 Side portion of first region 21G2 Top part of the first area 22, 22DX, 22DY, 22DZ, 22EX, 22EY, 22F Flexible PCB second area 23 One inner surface of the first region of the flexible substrate 24 The other inner surface of the first region of the flexible substrate 25 Side portion of first region of flexible substrate 25E Opening part 26 Top surface of the first area of ​​the flexible substrate 30, 30DI, 30DII adhesive layer 40, 41-43 Electronic components 50 Electronic Components 60, 60DX, 60DY, 60G Elastic Wiring 65G Elastic Wiring Slit 70F Ferrite Sheet

Claims

1. A flexible substrate and a stretchable member that is partially integrated with the flexible substrate and has elasticity, the flexible substrate includes a first region having a first shape that is bent at least in a direction perpendicular to an extending direction of a main surface of the flexible substrate, and a second shape that is extended in one direction; The first region is changeable between the bent shape and the extended shape by the elastic member, The flexible substrate further includes a second region contiguous with the first region, the second region being disposed on at least one side of the first region and extending in one direction.

2. 10. The stretchable device of claim 1, wherein the elastic member expands or contracts depending on the configuration of the first region.

3. 10. The stretchable device of claim 1, wherein the elastic member is stretched and an elastic force acts on the stretched elastic member when the first region is in the extended configuration.

4. 2. The stretchable device of claim 1, wherein there is a partial bond or adhesion between the flexible substrate and the stretchable member.

5. 2. The stretchable device of claim 1, wherein the flexible substrate has two main surfaces facing each other, and the stretchable member is disposed on at least one side of the two main surfaces.

6. The stretchable device according to claim 1 , wherein at least one of the first region and the second region of the flexible substrate and the stretchable member are bonded or adhered to each other.

7. The stretchable device of claim 1 , wherein a void is formed on an inner major surface side of the first region when the first region is in a bent configuration.

8. 2. The stretchable device according to claim 1, wherein, in a planar view, two or more of the first regions are arranged, and the two or more first regions are capable of extending in a plurality of directions including the extension direction of the main surface of the flexible substrate.

9. The stretchable device according to claim 8 , wherein an extension direction of one of the first regions is perpendicular to an extension direction of the other of the first regions.

10. 9. The stretchable device of claim 8, wherein, in a plan view, the two or more first regions have a common intersection portion, the intersection portion being an opening.

11. 2. The stretchable device according to claim 1, wherein, in a plan view, two or more of the first regions are arranged in the extension direction of the main surface of the flexible substrate, and one of the two or more first regions and the other of the first regions have different widths in the extension direction of the main surface of the flexible substrate.

12. The stretchable device according to claim 1 , wherein at least one of wiring and electronic components is disposed on at least one of the main surfaces of the first region and the second region of the flexible substrate, or on the stretchable member.

13. 13. The stretchable device of claim 12, wherein the wiring is coil wiring, and the coil wiring is disposed on a major surface of both the first region and the second region.

14. 13. The stretchable device of claim 12, wherein the height of the electronic component is less than a maximum height of the first region when in the bent configuration.

15. 15. The stretchable device of claim 14, wherein the first region has a maximum height of 2 mm or greater when in the bent configuration.

16. 10. The stretchable device of claim 1, wherein the first region and the second region of the flexible substrate are positionable flush with one another when the first region is in the extended configuration.

17. 10. The stretchable device of claim 1, wherein the first region is a bellows structure.

18. The stretchable device according to claim 1 , wherein the stretchable member has at least one of a film form and a cushion form.

19. The stretchable device according to claim 1, wherein, in a cross-sectional view, an angle θ between the first region and the second region in a bent form is 90 degrees or more and 135 degrees or less.

20. A flexible substrate and a stretchable member partially formed integrally with the flexible substrate, the stretchable member having elasticity, the flexible substrate includes a first region having a first shape that is bent at least in a direction perpendicular to an extending direction of a main surface of the flexible substrate, and a second shape that is extended in one direction; The first region is changeable between the bent shape and the extended shape by the elastic member, A stretchable device, wherein a void is formed on an inner major surface side of the first region when the first region is in a bent configuration.

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