JP2024003585A - stretchable device - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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

COPYRIGHT: (C)2024,JPO&INPIT

Description

FIELD OF THE INVENTION The present invention relates to stretchable devices.

2. Description of the Related Art Stretchable devices in which stretchable wiring is mounted on a stretchable base material have been known for some time. This stretchable device can be used by being attached to a living body (see Patent Document 1).

Japanese Patent Application Publication No. 2016-143763

Here, it is thought that the need for a more compact size stretchable device that can be attached to a living body will increase. In order to meet such needs, a stretchable device that has flexibility in addition to conventional stretchability is desired.

Therefore, an object of the present invention is to provide a stretchable device having stretchability and flexibility.

In order to achieve the above object, in one embodiment of the present invention,
comprising a flexible substrate and an elastic member partially integrated with the flexible substrate,
The flexible substrate includes a first region having a bending shape in at least a first direction as a first shape, and a first region having a shape extending in one direction as a second shape,
A stretchable device is provided, wherein the first region is changeable between the deflected configuration and the extended configuration by the stretchable member.

According to the stretchable device according to one embodiment of the present invention, it is possible to have stretchability and flexibility.

FIG. 1 is a cross-sectional view schematically showing a stretchable device in an initial state according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the stretchable device in a stretched state according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view schematically showing a stretchable device in an initial state according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing a stretchable device in an initial state according to a third embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing a stretchable device in an initial state according to a fourth embodiment of the present invention. FIG. 6 is a cross-sectional view schematically showing a stretchable device in an initial state according to a fifth embodiment of the present invention. FIG. 7A is a plan view schematically showing a stretchable device in an initial state according to a sixth embodiment of the present invention. FIG. 7B is a cross-sectional view schematically showing the stretchable device in an initial state according to the sixth embodiment of the present invention between line segment II-II' in FIG. 7A. FIG. 7C is a cross-sectional view schematically showing the stretchable device in an initial state according to the sixth embodiment of the present invention, taken along line I-I' in FIG. 7A. FIG. 8 is a plan view schematically showing a stretchable device in a stretched state according to a sixth embodiment of the present invention. FIG. 9A is a plan view schematically showing a stretchable device in an initial state according to a seventh embodiment of the present invention. FIG. 9B is a cross-sectional view schematically showing the stretchable device in an initial state according to the seventh embodiment of the present invention between line segment I-I' in FIG. 9A. FIG. 9C is a cross-sectional view schematically showing the stretchable device in an initial state according to the seventh embodiment of the present invention between line segment II-II' in FIG. 9A. FIG. 10A is a plan view schematically showing a stretchable device in a stretched state according to an eighth embodiment of the present invention. FIG. 10B is an enlarged plan view schematically showing the first region of the flexible substrate and its peripheral region of the stretchable device in the stretched state of FIG. 10A. FIG. 10C is an enlarged cross-sectional view schematically showing the first region and its peripheral region of the flexible substrate of the stretchable device in an initial state. FIG. 11 is an enlarged sectional view schematically showing another configuration of the first region of the flexible substrate of the stretchable device in the initial state.

Hereinafter, embodiments of the present invention will be described in detail using the drawings. In each embodiment, points different from those described before the embodiment will be mainly explained. In particular, similar effects due to similar configurations will not be mentioned for each embodiment. Among the components in the following embodiments, components that are not described in the independent claims will be described as arbitrary components. Furthermore, the sizes and size ratios of the components shown in the drawings are not necessarily exact. Further, in each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping explanations may be omitted or simplified. Note that in the following embodiments and drawings, the stretchable device in the initial state refers to the case where the device is equipped with a flexible substrate of the first form described later, and the stretchable device in the stretched state refers to the case where it is equipped with the flexible substrate of the second form described later. refers to

[First embodiment]
Hereinafter, the configuration of the stretchable device 100 according to the first embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 is a cross-sectional view schematically showing a stretchable device in an initial state according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the stretchable device in a stretched state according to the first embodiment of the present invention.

A stretchable device 100 according to a first embodiment of the present invention includes a stretchable base material 10, a flexible substrate 20, an adhesive layer 30 for bonding the two substrates together, and electronic components 40 and 50. Note that the term "above" used in this specification refers to a state of being located above a certain element, that is, a state of being located above a certain element through another object, a state of being located above an element with a gap between them. , and the state located directly above a certain element.

The main components of the stretchable device 100 described above will be specifically explained below. After that, the characteristic parts of the first embodiment will be explained.

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

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

The thickness of the stretchable base material 10 is not particularly limited, but from the viewpoint of not inhibiting the expansion and contraction of the surface of a living body when it is attached to a living body, it is preferably 100 μm or less, and more preferably 50 μm or less. Further, the thickness of the stretchable base material 10 is preferably 20 μm or more from the viewpoint of ensuring a predetermined strength.

(Flexible board 20)
The flexible substrate 20 is a flexible substrate. The flexible substrate 20 is made of at least one material selected from the group consisting of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyetheretherketone (PEEK), polyimide (PI), liquid crystal polymer, etc. I can do it. Desirably, a material made of polyimide having flexibility and bending properties can be used.

The thickness of the flexible substrate 20 is not particularly limited, but from the viewpoint of flexibility, it is preferably 100 μm or less, more preferably 50 μm or less. Further, the thickness of the stretchable base material 10 is preferably 20 μm or more from the viewpoint of ensuring a predetermined strength.

(Adhesive layer 30)
The adhesive layer 30 is configured to be able to partially adhere between the stretchable base material 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, or silicone-based adhesives can be used. When using a pressure-sensitive adhesive, it can be bonded to the other member at a relatively low temperature, so it is possible to prevent deterioration and distortion of the elastic base material 10 and the flexible substrate 20 due to the use of excessive heat or UV energy. .

(Electronic parts 40, 50)
Electronic components 40 and 50 may be placed on the main surface of flexible substrate 20. In this embodiment, the electronic component 40 and the electronic component 50 may be electrically connected by wiring or the like (not shown), or may function as mutually independent electronic components without being electrically connected. For example, a temperature sensor, an acceleration sensor, a coil that irradiates electromagnetic waves into the body, an ultrasonic oscillator that irradiates ultrasound into the body, an LED for measuring SpO ₂ (percutaneous arterial blood oxygen saturation), a light receiving sensor, and a circuit. Examples include a battery that serves as an operating power source, and a BLE module that wirelessly communicates data.

(Characteristics of the first embodiment)
On the premise of the above configuration, the first embodiment has a first region in which the flexible substrate 20 has a bending shape in at least a first direction as an initial first shape and an extending shape in one direction as a second shape. (See Figure 1). The first region 21 may have a curved shape or a bent shape as a deflection shape. Preferably, the first region 21 may have a bellows structure. With this configuration, a void can be formed on the inner main surface side of the first region 21 .

In one example, in an initial state, the first region 21 of the flexible substrate 20 has two side surfaces 25 facing each other and a top surface section 26 continuous thereto in a cross-sectional view. Without being limited to this, the first region 21 may have a configuration in which the ends of two mutually opposing side surfaces 25 are continuous without substantially having a top surface. (See Figure 11).

Furthermore, the flexible substrate 20 can further include a second region 22 that is continuous with the first region 21 . The second region 22 is arranged on at least one side of the first region 21 and extends in one direction. From another point of view, the second region 22 forms the bottom surface of the flexible substrate 20 in the deflected state.

In one example, the second region 22 may be arranged on both sides of the first region 21. In this case, the stretchable base material 10 may have a form extending in one direction from the second region 22 on one side to the second region 22 on the other side via the first region 21.

In this form, as described above, since the void is formed on the inner main surface side of the first region 21, the electronic component is located in the first region 21 in addition to or instead of the main surface of the flexible substrate 20. It can also be placed on the main surface of the stretchable base material 10.

Further, as described above, the stretchable base material 10 has an elastic function and is partially adhered or joined to the flexible substrate 20. This means that the elastic stretchable base material 10 can be partially integrated with the flexible substrate 20.

Because of this configuration, the flexible substrate 20, especially the first region 21 thereof, is a stretchable base material that can be changed or freely changed between the above-mentioned deflection form and the extending form in one direction by the stretchable member 10. . In other words, the stretchable base material 10 can expand or contract depending on the shape of the first region 21 of the flexible substrate 20.

Specifically, as described above, in the initial state, the first region 21 of the flexible substrate 20 may have a deflected configuration, specifically a curved or bent configuration (see FIG. 1). In this case, the stretchable base material 10 may be in a contracted state corresponding to the bending form of the first region 21 of the flexible substrate 20. Although not particularly limited, the angle θ formed between the first region 21 and the second region 22 of the flexible substrate 20 in the flexible substrate 20 in a sectional view may be greater than or equal to 90 degrees and less than or equal to 135 degrees. can.

When a tensile force is applied to the flexible substrate 20, the first region 21 can change from the above-mentioned deflected configuration to an extended configuration (see FIG. 2). In this case, the stretchable base material 10 can be in a stretched state corresponding to the extension form of the first region 21 of the flexible substrate 20. Note that 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.

Since the stretchable base material 10 has elastic properties as described above, an elastic force acts on the stretched stretchable base material 10 to return it to its original shape. Due to the action of such elastic force, the first region 21 of the flexible substrate 20 can be contracted from the above-described one-direction extending configuration to the original bent configuration.

From the above, according to this embodiment, the stretchable device 100 can have both stretchability and flexibility as a whole. Therefore, it becomes possible to provide the stretchable device 100 having a more compact size to the living body 200.

Note that, from the viewpoint of reducing the height of the stretchable device, the height of the electronic components 40 and 50 is preferably lower than the maximum height of the first region 21 of the flexible substrate 20 in the bending state. For example, the maximum height of the first region 21 in the deflected state may be 2 mm or more.

Below, the characteristic configuration of each embodiment will be mainly described. Configurations that are the same or substantially the same as the configurations of the embodiments already described before describing each embodiment will be omitted or omitted from the viewpoint of avoiding duplication of content.

[Second embodiment]
Hereinafter, the configuration of the stretchable device according to the second embodiment will be described with reference to FIG. 3. The second embodiment differs from the first embodiment (see FIGS. 1 and 2) in that the stretchable device further includes wiring.

FIG. 3 is a cross-sectional view schematically showing a stretchable device in an initial state according to a second embodiment of the present invention.

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

In the second embodiment, the stretchable wiring 60 may be arranged on the main surfaces of the first region 21 and the second region 22 continuous thereto of the flexible substrate 20. Further, second regions 22 may be positioned on both sides of the first region 21 of the flexible substrate 20, and electronic components 41 and 42 may be arranged on the main surface of each second region 22.

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 spaced apart from each other without detouring other electrical paths.

In this specification, "stretchable wiring 60 disposed on the main surfaces of the first region 21 and second region 22 of the flexible substrate 20" refers to the stretchable wiring 60 arranged on the main surface of the flexible substrate 20. It includes wiring and stretchable wiring that does not directly contact the main surface of the flexible substrate 20 but is spaced apart from the main surface via another member (for example, a resin layer).

The stretchable wiring 60 can include conductive particles and resin. Examples of the stretchable wiring 60 include a mixture of metal powder such as Ag, Cu, and Ni as conductive particles and an elastomer resin such as silicone resin. Although the average particle size of the conductive particles is not particularly limited, it is preferably 0.01 μm or more and 10 μm or less. Further, the shape of the conductive particles is preferably spherical.

The thickness of the stretchable wiring 60 is not particularly limited, but is preferably 100 μm or less, more preferably 50 μm or less. Moreover, it is preferable that the thickness of the stretchable wiring 60 is 0.01 μm or more. Although the line width of the stretchable wiring 60 is not particularly limited, it is preferably 0.1 μm or more, and more preferably 10 mm or less. Further, the shape and number of the stretchable wiring 60 are not particularly limited.

Note that the stretchable device may be configured to include a stretchable base material, a meander-shaped wiring pattern provided on the stretchable base material, and an electronic component mounted on the wiring pattern. This meander-shaped wiring pattern can be positioned in a direction substantially parallel to the stretching direction of the stretchable base material in the bent form.

In contrast, in the present embodiment, the flexible substrate 20 is arranged between the elastic base material 10 (corresponding to an elastic member) and the elastic wiring 60, and the first region 21 of the flexible substrate 20 is bent. In the form, it can be positioned in a direction (substantially perpendicular) that intersects with the stretching direction of the stretchable base material 10. In this respect, the configuration of this embodiment may differ from the configurations described above.

[Third embodiment]
Hereinafter, the configuration of the 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.

FIG. 4 is a cross-sectional view schematically showing a stretchable device in an initial state according to a third embodiment of the present invention.

As shown in FIG. 4, unlike the first embodiment, the stretchable cushion body 10B having elasticity may be partially integrated with the flexible substrate 20. Due to this configuration, the first region 21 of the flexible substrate 20 can be changed into a flexible form and an extending form in one direction by the elastic cushion body 10B. In other words, the stretchable cushion body 10B can expand or contract depending on the form of the first region 21 of the flexible substrate 20.

In this specification, the stretchable base material 10 (see FIG. 1, etc.) and the stretchable cushion body 10B are collectively referred to as a "stretchable member."

The position of the stretchable cushion body 10B is not particularly limited as long as it can be expanded and contracted in accordance with both the above-mentioned bending form and extension form of the first region 21 of the flexible substrate 20. For example, the elastic cushion body 10B may be joined or bonded to two mutually opposing inner surfaces 23 and 24 of the first region 21 in a flexible configuration. These two inner surfaces 23 and 24 may be side surfaces extending in a direction intersecting the direction in which the second region 22 of the flexible substrate 20 extends in one direction.

In FIG. 4, as an example, the stretchable cushion body 10B shows a mode in which the lower end sides of the inner surfaces 23 and 24 are connected to each other, but the cross-sectional size of the stretchable cushion body 10B is such that it is integrated with the first region 21. There is no particular limitation if it is. For example, if the stretchable cushion body 10B is sufficiently soft, it can also contact the top surface side of the first region 21 on the premise that it is integrated with the first region 21. That is, the stretchable cushion body 10B can have a cross-sectional size that is substantially the same as the cross-sectional size of a gap (also referred to as an inner space) that may be formed on the inner main surface side of the first region 21.

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 elastic cushion body 10B may be in a contracted state corresponding to the bending form of the first region 21.

When a tensile force is applied to the flexible substrate 20, the first region 21 can change from a bent form to an extended form in one direction. In this case, the stretchable cushion body 10B can be in a stretched state corresponding to the extension form 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 stretched stretchable cushion body 10B to return it to its original shape. Due to the action of such elastic force, the first region 21 of the flexible substrate 20 can be contracted from the unidirectionally extending form to the original bent form.

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

[Fourth embodiment]
Hereinafter, the configuration of the 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).

FIG. 5 is a cross-sectional view schematically showing a stretchable device in an initial state according to a fourth embodiment of the present invention.

As shown in FIG. 5, in the fourth embodiment, a combination of the first embodiment (see FIGS. 1 and 2) and the third embodiment (see FIG. 4) is possible. In this case, both the elastic base material 10 and the elastic cushion body 10B may be partially integrated with the flexible substrate 20. Because of this configuration, the first region 21 of the flexible substrate 20 can be changed into a flexible form and an extending form in one direction by both the elastic base material 10 and the elastic cushion body 10B. There is. In other words, both the stretchable base material 10 and the stretchable cushion body 10B can expand or contract depending on the form of the first region 21 of the flexible substrate 20.

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 elastic base material 10 and the elastic cushion body 10B may be in a contracted state corresponding to the bending form of the first region 21.

When a tensile force is applied to the flexible substrate 20, the first region 21 can change from a bent form to an extended form in one direction. In this case, both the stretchable base material 10 and the stretchable cushion body 10B can be in a stretched state corresponding to the extension form of the first region 21 of the flexible substrate 20. Since both the stretchable base material 10 and the stretchable cushion body 10B have elastic properties, the first region 21 of the flexible substrate 20 can be changed from the unidirectionally extending shape to the original bent shape more suitably. Can be contracted.

From the above, the fourth embodiment is more preferable than the first embodiment and the third embodiment in that the elastic force of both the elastic base material 10 and the elastic cushion body 10B can be utilized. It is a form.

In addition, in the fourth embodiment, since the elastic base material 10 has elasticity, the cushion body 10B may have relatively smaller elasticity than the elastic base material 10. That is, in this embodiment, the cushion body 10B does not necessarily have to be elastic. In this case, while the elastic base material 10 can be expanded and contracted in the left-right direction, the cushion body 10B may be soft and only have repulsive force.

[Fifth embodiment]
Hereinafter, the configuration of the 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 base materials 10 and 10D are used.

FIG. 6 is a cross-sectional view schematically showing a stretchable device in an initial state according to a fifth embodiment of the present invention.

As shown in FIG. 6, the fifth embodiment is characterized in that two stretchable base materials (a first stretchable base material 10DI and a second stretchable base material 10DII) are used. Furthermore, in the fifth embodiment, the flexible substrate 20D has two first regions 21DX, 21DY and three second regions 22DX to 22DZ spaced apart from each other by a predetermined distance. Electronic components 41 to 43 are arranged on each second area, respectively. Stretchable wiring lines 60DX and 60DY are respectively arranged between adjacent electronic components to ensure electrical connection.

Further, the first stretchable base material 10DI is connected to each of the second regions 22DX to 22DZ via an adhesive layer 30DI. In addition, the second stretchable base material 10DII is connected to each of the first regions 21DX and 21DY via an adhesive layer 30DII.

Note that, without being limited to this, only the second elastic base material 10DII may be connected to each of the first regions 21DX and 21DY via the adhesive layer 30DII. That is, in the case where the flexible substrate 20D has two principal surfaces facing each other, the stretchable base material may be placed on at least one side of the two principal surfaces of the flexible substrate 20D. Specifically, one or more stretchable base materials may be arranged on at least one side of the two main surfaces of flexible substrate 20D.

By adopting such a configuration, the flexible substrate 20D can be arranged so as to be sandwiched between the two stretchable base materials 10DI and 10DII in a cross-sectional view. Thereby, both of the two elastic elastic base materials 10DI and 10DII can be partially integrated with the flexible substrate 20. Since this configuration is adopted, the two first regions 21DX and 21DY of the flexible substrate 20 can be changed or freely changed into a flexible form and an extending form in one direction by both of the two stretchable base materials 10DI and 10DII. It has become. In other words, both of the two stretchable base materials 10DI and 10DII can be expanded or contracted depending on the form of the two first regions 21DX and 21DY of the flexible substrate 20.

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 base materials 10DI and 10DII may be in a contracted state corresponding to the deflection form of the two first regions 21DX and 21DY.

When a tensile force is applied to the flexible substrate 20D, the two first regions 21DX and 21DY can change from a bent form to an extended form in one direction. In this case, both of the two stretchable base materials 10DI and 10DII can be in a stretched state corresponding to the extension form of the two first regions 21DX and 21DY of the flexible substrate 20D. Since both of the two stretchable base materials 10DI and 10DII have elastic properties, the two first regions 21DX and 21DY of the flexible substrate 20D change from the unidirectionally extending form to the original bending form. It can be appropriately contracted.

From the above, the fifth embodiment is more suitable than the second embodiment in that it is possible to utilize the elastic forces of both the stretchable base materials 10DI and 10DII.

[Sixth embodiment]
The configuration of the stretchable device according to the sixth embodiment will be described below with reference to FIGS. 7A to 7C and FIG. 8. The sixth embodiment differs from the first embodiment (see FIGS. 1 and 2) in that it comprises a flexible substrate 20 with stretchable devices arranged in multiple directions.

FIG. 7A is a plan view schematically showing a stretchable device in an initial state according to a sixth embodiment of the present invention. FIG. 7B is a cross-sectional view schematically showing the stretchable device in an initial state according to the sixth embodiment of the present invention between line segment II-II' in FIG. 7A. FIG. 7C is a cross-sectional view schematically showing the stretchable device in an initial state according to the sixth embodiment of the present invention, taken along line I-I' in FIG. 7A. FIG. 8 is a cross-sectional view schematically showing a stretchable device in a stretched state according to a sixth embodiment of the present invention.

In the sixth embodiment, as shown in FIGS. 7A to 7C and FIG. 8, two or more first regions may be arranged in plan view. In this case, in the two or more first regions, one that can extend in the first direction (for example, the X direction) and one that can extend in the second direction (for example, the Y direction) may be arranged. In one example, the extending direction of one first region 21EX and the extending direction of the other first region 21EY may be perpendicular to each other.

Note that the first regions are not limited to two directions, and three or more first regions that can mutually extend in multiple directions (three or more directions) may be arranged so as to intersect with each other. Note that from the viewpoint of smooth bending, extension, and expansion/contraction of the first region of the flexible substrate 20E, two or more first regions have a common intersection in plan view, and the intersection is the opening portion 25E. It is preferable that

Further, in plan view, two or more first regions 21EX may be arranged in the first direction (for example, the X direction). In this case, one and the other of the two or more first regions 21EX1, 21EX2 (or 21EY1, 21EY2) may have different widths in the first direction. Specifically, the first regions 21EX1 and 21EY1 are relatively wider than the first regions 21EX2 and 21EY2. In other words, the first regions 21EX2 and 21EY2 have a relatively smaller width than the first regions 21EX1 and 21EY1.

The "width" here refers to the width along the X direction (corresponding to the first direction) when the first region that can extend in the X direction or the Y direction extends.

According to this embodiment, it is preferable that a part of the skin of the living body that makes minute or complicated movements, such as the skin of a joint part, be disposed opposite to the first region having a relatively small width. Thereby, the elastic member 10E integrated with the first region having a relatively small width can be expanded and contracted at a small pitch by following the movement of the skin and the like at the joint portion.

On the other hand, it is preferable that parts of the living body's skin that do not make relatively small or complicated movements, such as the skin of the forearm and upper arm, be placed opposite to the first region having the relatively large width. Thereby, it is possible to follow the movement of the skin of the forearm, upper arm, etc., and realize a large-pitch expansion and contraction in the elastic member 10E that is integrated with the first region having a relatively large width.

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 expansion and contraction of the elastic member 10E. This makes it possible to provide a stretchable device 100E that has different amounts of stretch and flexibility as a whole.

[Seventh embodiment]
The configuration of the stretchable device according to the seventh embodiment will be described below with reference to FIGS. 9A to 9C. The seventh embodiment differs from the first embodiment (see FIGS. 1 and 2) in that the stretchable device is in the form of a coil.

FIG. 9A is a plan view schematically showing a stretchable device in an initial state according to a seventh embodiment of the present invention. FIG. 9B is a cross-sectional view schematically showing the stretchable device in an initial state according to the seventh embodiment of the present invention between line segment I-I' in FIG. 9A. FIG. 9C is a cross-sectional view schematically showing the stretchable device in an initial state according to the seventh embodiment of the present invention between line segment II-II' in FIG. 9A.

As shown in FIGS. 9A to 9C, in the seventh embodiment, in the flexible substrate 20F, a plurality of first regions 21F are arranged in a circular manner at predetermined intervals, and between two adjacent first regions 21F. A quadrant-shaped ferrite sheet 70F may be disposed on the second region 22F. This arrangement of the ferrite sheet 70F makes it possible to increase the magnetic permeability of the magnetic path in the coil-shaped stretchable device 100F. Further, the first region 21F2 is also provided in the input/output terminal portion of the coil-shaped stretchable device 100F.

When a tensile force is applied to the flexible substrate 20F, the plurality of first regions 21F and 21F2 can change from a bent form to an extended form in one direction. In this case, the stretchable base material 10F can be in a stretched state corresponding to the extension form of each first region 21F, 21F2 of the flexible substrate 20F.

Since the stretchable base material 10F has elastic properties, an elastic force acts on the stretched stretchable base material 10F to return it to its original shape. Due to the action of such elastic force, each of the first regions 21F and 21F2 of the flexible substrate 20F can be contracted from the unidirectionally extending form to the original flexible form.

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

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

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

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

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

Two such slits 65G face each other in a direction perpendicular to the longitudinal direction of the wiring. Further, a plurality of slits 65G are arranged at predetermined intervals on the outer edge side along the longitudinal direction of the coil wiring 60G. In the arrangement region of the slit 65G, the coil wiring 60G can easily expand and contract.

In one example, in the initial state, the first region 21G of the flexible substrate 20G has a side surface portion 21G1 and a top surface portion 21G2 continuous thereto. From the perspective of making it easier for the stretchable device 100G to suitably provide both stretchability and flexibility as a whole in a plan view, the side surface portion 21G1 and the top surface portion 21G2 are designed to support the coil wiring 60G located on the upper side when stretched. It may be configured to be located between slit portions 65G arranged at predetermined intervals along the longitudinal direction.

By employing the above configuration, when a tensile force is applied to the flexible substrate 20G, the plurality of first regions 21G can change from a bent form to an extended form in one direction. In this case, the stretchable base material 10G can be in a stretched state corresponding to the extension form of each first region 21G of the flexible substrate 20G (see FIGS. 10A and 10B).

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. Due to the action of such elastic force, each first region 21G of the flexible substrate 20G can be contracted from the unidirectionally extending form to the original flexible form.

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

In addition, each embodiment and a modification are illustrations, and this invention is not limited to each embodiment and a modification. Moreover, each drawing is an illustration of the constituent elements, and does not limit the shape. Moreover, partial substitution or combination of the configurations shown in the different embodiments and modifications is possible.

For example, at least one of the wiring and the electronic component described in the above embodiments can be arranged on the main surface of at least one of the first region and the second region of the flexible substrate, or on the elastic member.

Note that aspects of the stretchable device according to one embodiment of the present invention are as follows.
<1>
comprising a flexible substrate and an elastic member partially integrated with the flexible substrate,
The flexible substrate includes a first region having a bending shape in at least a first direction as a first shape, and a first region having a shape extending in one direction as a second shape,
A stretchable device, wherein the first region can be changed between the deflected configuration and the extended configuration by the stretchable member.
<2>
The stretchable device according to <1>, wherein the stretchable member expands or contracts depending on the form of the first region.
<3>
The stretchable device according to <1> or <2>, wherein the stretchable member is stretched when the first region is in the extended state, and an elastic force acts on the stretched stretchable member.
<4>
The stretchable device according to any one of <1> to <3>, wherein there is a partial bonding site or adhesion site between the flexible substrate and the stretchable member.
<5>
The elastic according to any one of <1> to <4>, wherein the flexible substrate has two main surfaces facing each other, and the elastic member is arranged on at least one side of the two main surfaces. sexual device.
<6>
The flexible substrate further includes a second region continuous with the first region, and the second region is arranged on at least one side of the first region and extends in one direction. 5>. The stretchable device according to any one of 5>.
<7>
The stretchable device according to <6>, wherein at least one of the first region and the second region of the flexible substrate and the stretchable member are bonded or bonded to each other.
<8>
The stretchable device according to any one of <1> to <7>, wherein a void is formed on the inner main surface side of the first region when the first region is bent.
<9>
<1> to <7>, wherein two or more first regions are arranged in a plan view, and the two or more first regions can extend in a plurality of directions including the first direction. The stretchable device according to any one of the above.
<10>
The stretchable device according to <9>, wherein the extending direction of one of the first regions and the extending direction of the other first region are orthogonal to each other.
<11>
The stretchable device according to <9> or <10>, wherein the two or more first regions have a common intersection in plan view, and the intersection is an opening.
<12>
In plan view, two or more of the first regions are arranged in the first direction, and one and the other of the two or more first regions have mutually different widths in the first direction, <1> to The stretchable device according to any one of <11>.
<13>
<7 subordinate to <6>, wherein at least one of wiring and electronic components is disposed on the main surface of at least one of the first region and the second region of the flexible substrate or on the stretchable member. The stretchable device according to any one of >> to <12>.
<14>
The stretchable device according to <13>, wherein the wiring is a coil wiring, and the coil wiring is arranged on the main surface of both the first region and the second region.
<15>
The stretchable device according to <13> or <14>, wherein the height of the electronic component is lower than the maximum height of the first region in the deflected state.
<16>
The stretchable device according to <15>, wherein the maximum height of the first region in the deflected state is 2 mm or more.
<17>
<7> to <16> subordinate to <6>, wherein the first region and the second region of the flexible substrate can be positioned on the same plane with each other when the first region is in the extended form. The stretchable device according to any one of the above.
<18>
The stretchable device according to any one of <1> to <17>, wherein the first region has a bellows structure.
<19>
The stretchable device according to any one of <1> to <18>, wherein the stretchable member has at least one of a film shape and a cushion shape.
<20>
Any of <7> to <19> subordinate to <6>, wherein in cross-sectional view, the angle θ between the first region and the second region is 90 degrees or more and 135 degrees or less. The stretchable device according to any one of the above.

200 Living body skin, etc.

100, 100A~100H Stretchable device

10, 10DI, 10DII, 10E, 10F, 10G Elastic member 10B Elastic cushion body

20, 20D, 20E, 20F, 20G Flexible substrate 21, 21DX, 21DY, 21EX, 21EX1, 21EX2, 21EY, 21EY1, 21EY2, 21F, 21F2, 21G First region of flexible substrate 21G1 Side portion of first region 21G2 First Top surface portions 22, 22DX, 22DY, 22DZ, 22EX, 22EY, 22F of the regions Second region 23 of the flexible substrate One inner surface 24 of the first region of the flexible substrate Other inner surface 25 of the first region of the flexible substrate Side surface portion 25E of the first region of the opening portion 26 Top surface portion of the first region of the flexible substrate

30, 30DI, 30DII adhesive layer

40, 41-43 Electronic components

50 Electronic parts

60, 60DX, 60DY, 60G Stretchable wiring 65G Stretchable wiring slit

70F ferrite sheet

Claims (20)

comprising a flexible substrate and an elastic member partially integrated with the flexible substrate,
The flexible substrate includes a first region having a bending shape in at least a first direction as a first shape, and a first region having a shape extending in one direction as a second shape,
A stretchable device, wherein the first region can be changed between the deflected configuration and the extended configuration by the stretchable member. 2. The stretchable device of claim 1, wherein the stretchable member expands or contracts depending on the configuration of the first region. The stretchable device according to claim 1, wherein the stretchable member is stretched during the extended configuration of the first region, and an elastic force acts on the stretched stretchable member. The stretchable device according to claim 1, wherein there is a partial bonding site or adhesion site between the flexible substrate and the stretchable member. The stretchable device according to claim 1, wherein the flexible substrate has two major surfaces facing each other, and the stretchable member is disposed on at least one side of the two major surfaces. The flexible substrate further includes a second region continuous with the first region, and the second region is disposed on at least one side of the first region and extends in one direction. stretchable device. The stretchable device according to claim 6, wherein at least one of the first region and the second region of the flexible substrate and the stretchable member are joined or bonded to each other. The stretchable device according to claim 1, wherein a void is formed on the inner main surface side of the first region when the first region is in a deflected state. 2. The elastic device according to claim 1, wherein two or more of the first regions are arranged in a plan view, and the two or more of the first regions can extend in a plurality of directions including the first direction. sex device. The stretchable device according to claim 9, wherein the extending direction of one of the first regions and the extending direction of the other first region are orthogonal to each other. The stretchable device according to claim 9, wherein the two or more first regions have a common intersection in plan view, and the intersection is an opening. In a plan view, two or more of the first regions are arranged in the first direction, and one and the other of the two or more first regions have mutually different widths in the first direction. Stretchable device as described. 7. The stretchable device according to claim 6, wherein at least one of wiring and electronic components is arranged on the main surface of at least one of the first region and the second region of the flexible substrate or on the stretchable member. device. 14. The stretchable device according to claim 13, wherein the wiring is a coil wiring, and the coil wiring is arranged on a main surface of both the first region and the second region. 14. The stretchable device of claim 13, wherein the height of the electronic component is less than the maximum height of the first region during the deflected configuration. 16. The stretchable device of claim 15, wherein the first region has a maximum height of 2 mm or more in the deflected configuration. 7. The stretchable device of claim 6, wherein during the extended configuration of the first region, the first region and the second region of the flexible substrate are positionable in the same plane as each other. 2. The stretchable device of claim 1, wherein the first region has a bellows structure. The stretchable device according to claim 1, wherein the stretchable member has at least one of a film shape and a cushion shape. The stretchable device according to claim 6, wherein in a cross-sectional view, an angle θ between the first region and the second region in the deflected state is 90 degrees or more and 135 degrees or less.

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