JP2018120971A - Elasticized wiring board, controller and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elasticized wiring board capable of restraining disconnection of wiring pattern, and to provide a controller and an electronic apparatus.SOLUTION: An elasticized wiring board has a stretchable first region, and a second region stretching of which is inhibited. The elasticized wiring board includes an insulation base material having elasticity, a wiring pattern provided in the insulation base material, and multiple reinforcement patterns provided in the insulation base material in the first region, and having elasticity lower than that of the insulation base material. The multiple reinforcement patterns are provided so that the distribution degree thereof changes gradually from dense to coarse, as receding from the boundary of the first and second regions.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a stretchable wiring board, a control device, and an electronic apparatus.

  In recent years, in the technical field of wearable devices, shape adaptability is required for a wiring board in accordance with a wearing part such as a hand or an arm. Also in the robot field, shape adaptability corresponding to the movable part is required for the wiring board. In order to meet such requirements, a stretchable wiring board is known as a stretchable wiring board. The stretchable wiring board has a stretchable insulating base material and a wiring pattern provided on the insulating base material. The wiring pattern is made of a material that does not lose its electrical conductivity even if it expands and contracts.

  In a region where an electronic component such as an IC chip is mounted or a region fixed to a rigid substrate, expansion and contraction of the stretchable wiring substrate is hindered. Thus, there is a problem that the wiring pattern is easily disconnected at the boundary between the region where expansion and contraction is inhibited and the region where expansion and contraction is possible. For example, in the case of a wristband type wearable device having a band made of a stretchable wiring board and an electronic component (such as a sensor) mounted on the band, the band is widened when the wearable device is attached. Go through the part. Thereafter, the band contracts and the wearable device is worn on the wrist. When the wearable device is expanded, the region where the electronic component is mounted cannot be extended, and therefore, the wiring is easily disconnected at the boundary portion.

JP 2013-187308 A

  The problem to be solved by the present invention is to provide a stretchable wiring board, a control device, and an electronic device that can suppress disconnection of a wiring pattern.

  The stretchable wiring board according to the embodiment includes a first region that can be stretched and a second region in which the stretch is inhibited. This stretchable wiring board is provided with a stretchable insulating base, a wiring pattern provided on the insulating base, and the insulating base in the first region, and is more stretchable than the insulating base. A plurality of low reinforcement patterns. The plurality of reinforcing patterns are provided such that the degree of distribution gradually changes from dense to coarse as the distance from the boundary between the first region and the second region increases.

1 is a perspective view of a stretchable wiring board and a rigid board according to a first embodiment. It is a top view of the elastic wiring board which concerns on 1st Embodiment before and behind expansion | extension. It is a top view which shows the 1st modification of a reinforcement pattern. It is a top view which shows the 2nd modification of a reinforcement pattern. It is a top view which shows the 3rd modification of a reinforcement pattern. It is a top view which shows the 4th modification of a reinforcement pattern. It is a top view which shows the 5th modification of a reinforcement pattern. It is a top view which shows the 6th modification of a reinforcement pattern. It is a top view of the control device concerning a 2nd embodiment. It is a side view of the control apparatus in the state with which the finger was equipped. It is a side view of a control device in the state where a finger was bent. It is explanatory drawing at the time of mounting | wearing the wrist with the electronic device which concerns on 3rd Embodiment. It is a figure which shows the state with which the electronic device which concerns on 3rd Embodiment was mounted | worn with the wrist.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the stretchable wiring board 1 according to the first embodiment has a stretchable region A1 (first region) and a region A2 (second region) where the stretch is inhibited. doing. In the first embodiment, the area A <b> 2 is an area where expansion and contraction is hindered because the elastic wiring board 1 is fixed to the rigid board 30. Note that the area A2 is not limited to this, and may be an area in which expansion and contraction is hindered because electronic parts such as sensor parts are mounted. Two rigid boards may be provided so as to sandwich the area A2 of the stretchable wiring board 1.

  As shown in FIGS. 1 and 2, the stretchable wiring board 1 is provided on the insulating base 2, the wiring pattern 3 provided on the insulating base 2, and the insulating base 2 in the region A <b> 1. A plurality of reinforcing patterns 4 for reinforcing the material 2. In FIG. 1, the reinforcing pattern 4 is not shown. In FIG. 2, the upper diagram is a plan view of the stretchable wiring board 1 before being stretched, and the lower diagram is a plan view of the stretchable wiring board 1 that has been stretched by a tensile force.

  The insulating base material 2 is an insulating base material having elasticity. The insulating substrate 2 is made of an elastomer such as rubber, for example, but the material is not particularly limited as long as it is an insulating material having a desired stretchability.

  The wiring pattern 3 is a conductive wiring for propagating an electric signal. In the present embodiment, as shown in FIG. 1, four wiring patterns 3 are provided so as to extend in parallel with each other along the longitudinal direction of the insulating base 2. The number and shape of the wiring patterns are not limited to this, and may be any number and shape. In FIG. 1, the wiring pattern 3 is provided on the upper surface of the insulating base material 2, but may be provided on the lower surface of the insulating base material 2. The wiring pattern 3 may be covered with an insulating base (not shown) different from the insulating base 2.

  The wiring pattern 3 is composed of metal foil (for example, copper foil), conductive paste (for example, silver paste), carbon nanotube, or the like, and can maintain desired conductivity even when the stretchable wiring board 1 is stretched. The material is not particularly limited as long as it is present.

  As shown in FIG. 2, the plurality of reinforcing patterns 4 are provided on the insulating base material 2 in the region in contact with the boundary B in the region A1. The boundary B is a boundary between the expandable area A1 and the area A2 where expansion and contraction is inhibited.

  The plurality of reinforcing patterns 4 are provided to partially control the degree of expansion / contraction (the amount of expansion / contraction) of the elastic wiring board 1. The reinforcing pattern 4 is less stretchable than the insulating substrate 2. For this reason, in the region where the reinforcing patterns 4 are densely arranged, the stretchability of the stretchable wiring board 1 is low. On the contrary, in the region where the reinforcing patterns 4 are not arranged so densely, the stretchability of the stretchable wiring board 1 is large.

  As shown in FIG. 2, in the present embodiment, the plurality of reinforcing patterns 4 are linear patterns extending in the same direction as the stretching direction of the stretchable wiring board 1 and are separated from the boundary B between the regions A1 and A2. Accordingly, the number of arrangements is reduced.

  More generally speaking, as shown in FIG. 2, the plurality of reinforcing patterns 4 are provided such that the distribution degree gradually changes from dense to coarse as the distance from the boundary B increases. Here, the “distribution degree” is the arrangement density of the reinforcing patterns. This degree of distribution can also be defined by the area of the reinforcing pattern 4 that occupies a region of unit length along the stretch direction of the stretchable wiring substrate 1. “The distribution degree gradually changes from dense to coarse” means that the distribution degree of the reinforcing pattern gradually changes from coarse to dense as viewed globally, and locally becomes coarse to dense. May be. For example, in the upper drawing of FIG. 2, the region s1 includes three reinforcing patterns 4, and the region s2 located farther from the boundary B than the region s1 includes five reinforcing patterns 4. As described above, the number of reinforcement patterns 4 is locally increased. However, since the number of reinforcement patterns 4 is reduced from three to one when viewed globally, the distribution degree is increased from dense to coarse. It can be said that it is gradually changing.

  The plurality of reinforcing patterns 4 are made of the same material as the wiring pattern 3. The plurality of reinforcing patterns 4 are provided at the same height as the wiring pattern 3 so as to be electrically insulated from the wiring pattern 3. Thereby, it becomes possible to form the reinforcement pattern 4 in the same process as the wiring pattern 3, and the manufacturing cost of the stretchable wiring board 1 can be suppressed.

  The material of the reinforcing pattern 4 is not particularly limited as long as it has lower elasticity than the insulating base material 2, and may be a metal, resin, fiber, or the like different from the wiring pattern 3.

  Further, the reinforcing pattern 4 may be provided at a height different from that of the wiring pattern 3. For example, the wiring pattern 3 may be provided on the upper surface of the insulating base material 2, and the reinforcing pattern 4 may be provided on the lower surface or inside of the insulating base material 2.

  As shown in FIG. 2, the plurality of reinforcing patterns 4 may be provided closer to the wiring pattern 3 in a plan view of the stretchable wiring board 1. Thereby, disconnection of the wiring pattern 3 can be suppressed more effectively.

  As described above, in the first embodiment, the plurality of reinforcing patterns 4 are provided such that the degree of distribution gradually changes from dense to coarse as the distance from the boundary B between the regions A1 and A2 increases. For this reason, the region A1 of the stretchable wiring board 1 is not easily stretched in the portion close to the region A2, and is easily stretched away from the region A2. Thereby, the stress applied to the wiring pattern 3 when the stretchable wiring board 1 is extended can be reduced, and as a result, disconnection of the wiring pattern 3 can be suppressed.

  More specifically, when the maximum stress is applied to the wiring pattern 3 in the vicinity of the boundary B when the stretchable wiring board 1 is extended, the reinforcing patterns 4 are densely arranged in the vicinity of the boundary B. For this reason, the stretchable wiring board 1 is particularly difficult to extend in the vicinity of the boundary B, and the wiring pattern 3 can be prevented from being disconnected in the vicinity of the boundary B. Furthermore, in the first embodiment, as shown in FIG. 2, the reinforcing pattern 4 is provided so that the distribution degree gradually decreases from the boundary B toward the region A1 side. For this reason, the distribution range of the stress applied to the wiring pattern 3 widens from the vicinity of the boundary B toward the region A1, and as a result, the stress peak applied to the wiring pattern 3 near the boundary B can be further reduced. Further, when the reinforcing pattern 4 is arranged only in the vicinity of the boundary B, it is assumed that a large stress is applied to the wiring pattern 3 at the boundary portion between the reinforcing pattern 4 and the insulating base material 2 and the wiring pattern 3 is disconnected. However, in the first embodiment, since the reinforcing pattern 4 is provided so that the distribution degree gradually decreases from the boundary B toward the region A1 side, such a situation can be effectively suppressed. .

  As described above, according to the first embodiment, disconnection of the wiring pattern 3 in the stretchable wiring board 1 can be suppressed.

  Next, modified examples of the reinforcing pattern 4 will be described with reference to FIGS. 3A to 3F. In any of the modifications, the same effect as described above can be obtained.

  In the first modification, as shown in FIG. 3A, the reinforcing pattern 4 is a linear pattern extending in a direction orthogonal to the expansion / contraction direction of the stretchable wiring substrate 1 (vertical direction in FIG. 3A), and the boundary B It is provided so that the arrangement density decreases as the distance from the distance increases. In this example, the line widths of the reinforcing patterns 4 are equal, and the distance between the reinforcing patterns 4 increases as the distance from the boundary B increases.

  In the second modification, as shown in FIG. 3B, the reinforcing pattern 4 is a linear pattern extending in a direction orthogonal to the expansion / contraction direction of the stretchable wiring substrate 1 (vertical direction in FIG. 3B), and the boundary B It is provided to become thinner as you move away from it. As shown in FIG. 3B, the interval between the reinforcing patterns 4 may be increased as the distance from the boundary B increases.

  The shape of the reinforcing pattern 4 is not limited to a linear shape. As shown in FIG. 3C, in the third modification, the reinforcing pattern 4 is a granular pattern, and is provided so that the arrangement density decreases as the distance from the boundary B increases. Further, in the fourth modified example, as shown in FIG. 3D, the reinforcing pattern 4 is a granular pattern, and is provided so as to become smaller as the distance from the boundary B increases.

  In the fifth modified example, as shown in FIG. 3E, the reinforcing pattern 4 is a linear pattern extending in the same direction as the expansion / contraction direction of the stretchable wiring board 1, and the number of arrangement patterns decreases as the distance from the boundary B increases. It is provided as follows.

  In the sixth modified example, as shown in FIG. 3F, the shape of the reinforcing pattern 4 is an arc shape, and is provided so that the curvature of the arc decreases as the distance from the boundary B increases. Even with such a shape, the stretchable wiring board 1 is hardly stretched in the vicinity of the boundary B, and can be easily stretched away from the boundary B toward the region A1.

(Second Embodiment)
Next, a second embodiment according to the present invention will be described with reference to FIGS. 4, 5A, and 5B.

  The control device 10 according to the second embodiment is a control device that is worn on a non-wearing object (a finger in this embodiment). The control device 10 includes a stretchable wiring board 1A, and the stretchable wiring board 1A expands and contracts according to the movement of a finger. The non-wearing object is not limited to a finger, but may be another body part of a person or an animal or a movable part of a robot.

  As shown in FIG. 4, the control device 10 according to the second embodiment includes a stretchable wiring board 1A having a stretchable area A1 and a stretchable area A2 and a region A2 of the stretchable wiring board 1A. And a fixing portion 11 fixed to the head. The region A2 of the stretchable wiring board 1A is a region where the stretchable wiring board 1A is a region where the stretchable wiring substrate 1A is fixed to the fixing portion 11 made of a hard material, so that expansion and contraction is hindered. The fixing part 11 is an annular member inserted through the finger. Note that the fixing portion 11 may be a member having another shape.

  As shown in FIG. 4, the elastic wiring board 1 </ b> A includes an insulating base 2, a wiring pattern 3 provided on the insulating base 2, and a plurality of reinforcing bases 2 provided on the insulating base 2. The reinforcing pattern 4 and at least one reinforcing pattern 5 are provided.

  The insulating base material 2 is configured in a cylindrical shape with a closed tip so that a finger can be inserted. FIG. 4 illustrates a state in which the cylindrical insulating substrate 2 is opened in a plane. Since the wiring pattern 3 is the same as that of the first embodiment, detailed description thereof is omitted.

  The reinforcing pattern 4 is provided on the insulating base material 2 in the region a3 of the stretchable wiring board 1A. The region a3 is a region in contact with the boundary B in the region A1.

  The reinforcement pattern 4 is a linear pattern extending in the same direction as the expansion / contraction direction of the stretchable wiring board 1 as in the first embodiment, and the number of arrangements decreases as the distance from the boundary B between the region A1 and the region A2 decreases. It is provided to do. As described with reference to FIGS. 3A to 3F in the first embodiment, the reinforcing pattern 4 is not limited to that shown in FIG.

  As shown in FIG. 4, the reinforcing pattern 5 is provided in the region a1 and the region a2 of the stretchable wiring board 1A. The region a1 and the region a2 are regions that are bent and stretched by the movement of the attachment object. In the present embodiment, as shown in FIGS. 5A and 5B, in a state where the control device 10 is attached to the finger, the region a1 corresponds to the first joint of the finger, and the region a2 corresponds to the second joint of the finger. It is an area.

  The reinforcing pattern 5 is less stretchable than the insulating base material 2, similarly to the reinforcing pattern 4. For this reason, in the area | region where the reinforcement pattern 5 is arrange | positioned, the expansion / contraction degree of the elastic wiring board 1 is low, and the wiring pattern 3 in the said area | region is protected. The reinforcing pattern 5 is made of the same material as the wiring pattern 3 and is provided at the same height as the wiring pattern 3 so as to be electrically insulated from the wiring pattern 3. Thereby, it becomes possible to form the reinforcement pattern 5 in the same process as the wiring pattern 3, and the manufacturing cost of the elastic wiring board 1A can be suppressed.

  The material of the reinforcing pattern 5 is not particularly limited as long as it has lower elasticity than the insulating base material 2, and may be a metal, resin, fiber, or the like different from the wiring pattern 3. Further, the reinforcing pattern 5 may be provided at a height different from that of the wiring pattern 3. For example, the wiring pattern 3 may be provided on the upper surface of the insulating base material 2, and the reinforcing pattern 5 may be provided on the lower surface or inside of the insulating base material 2.

  Moreover, as shown in FIG. 4, the reinforcement pattern 5 may be provided with two or more, and only one may be provided. Further, the reinforcing pattern 5 is not limited to the one shown in FIG. 4, and can take various shapes like the reinforcing pattern 4. Further, in the control device 10, only the reinforcing pattern 5 may be provided without providing the reinforcing pattern 4.

  In the control device 10, the stretchable wiring board may be formed like a glove on the entire surface of the bill, and the reinforcing pattern 5 may be provided in a region corresponding to each finger joint.

  According to the second embodiment, since the plurality of reinforcing patterns 4 are provided, it is possible to prevent the wiring pattern 3 from being disconnected in the region a3. Furthermore, since the reinforcing pattern 5 is provided, it is possible to prevent the wiring pattern 3 from being disconnected in the regions a1 and a2 that are bent and stretched by the operation of the attached object.

(Third embodiment)
Next, a third embodiment according to the present invention will be described with reference to FIGS. 6A and 6B.

  The electronic device 20 according to the third embodiment is a wearable device worn on a person's wrist. The electronic device 20 includes a stretchable wiring board 1B, and the stretchable wiring board 1A expands and contracts when being mounted on a non-wearing object (a wrist in the present embodiment).

  As shown in FIG. 6A, an electronic device 20 according to the third embodiment includes a stretchable wiring board 1B having a stretchable area A1 and a stretchable area A2 and a region A2 of the stretchable wiring board 1B. And a mounting portion 21 fixed to the head. The region A2 of the stretchable wiring board 1B is a region where the stretchable wiring board 1B is fixed to the mounting portion 21 and is thus inhibited from stretching. Since electronic components such as sensors and IC chips are mounted, the mounting portion 21 cannot be expanded and contracted. In the present embodiment, as shown in FIG. 6A, a plurality of regions A1 and regions A2 are alternately arranged.

  The stretchable wiring board 1B is similar to the stretchable wiring board 1 described in the first embodiment. The stretchable insulating substrate 2, the wiring pattern 3 provided on the insulating substrate 2, and the insulating substrate 2 And a plurality of reinforcing patterns 4 for reinforcing the above. 6A and 6B, the wiring pattern 3 is not shown.

  In the third embodiment, the insulating base material 2 is formed in an annular shape so that it can be attached to the wrist. Since the wiring pattern 3 is the same as that of the first embodiment, detailed description thereof is omitted.

  As shown in FIG. 6A, the reinforcing pattern 4 is provided on the insulating base material 2 in the region in contact with the boundary B in the region A1. The plurality of reinforcing patterns 4 are granular patterns that are scattered in the same direction as the expansion / contraction direction of the elastic wiring board 1 </ b> B, and are provided so that the arrangement density decreases as the distance from the boundary B increases. As described with reference to FIGS. 3A to 3F in the first embodiment, the reinforcing pattern 4 is not limited to that shown in FIG. 6A.

  When the electronic device 20 is mounted, as shown in FIG. 6A, the band portion corresponding to the region A1 is expanded and the electronic device 20 passes through the palm portion. Thereafter, as shown in FIG. 6B, the band portion contracts and the electronic device 20 is attached to the wrist.

  Since the plurality of reinforcing patterns 4 are provided in the region A1 adjacent to the mounting part 21, the stretchable wiring board 1B is difficult to extend near the boundary B with the mounting part 21, and the stress applied to the wiring pattern 3 is reduced. . Thereby, disconnection of the wiring pattern 3 can be suppressed. Therefore, according to the third embodiment, disconnection of the wiring pattern 3 due to the mounting operation of the electronic device 20 can be suppressed.

  According to at least one embodiment described above, disconnection of the wiring pattern can be suppressed.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

1, 1A, 1B Stretchable wiring board 2 Insulating base material 3 Wiring pattern 4, 5 Reinforcement pattern 10 Control device 11 Fixing part 20 Electronic device 21 Mounting part 30 Rigid board A1, A2, a1, a2, a3 s2 area

Claims (12)

A stretchable wiring board having a stretchable first region and a stretchable second region,
An insulating base material having elasticity;
A wiring pattern provided on the insulating substrate;
A plurality of reinforcing patterns provided on the insulating substrate in the first region and having a lower elasticity than the insulating substrate;
The elastic wiring board, wherein the plurality of reinforcing patterns are provided such that the degree of distribution gradually changes from dense to coarse as the distance from the boundary between the first region and the second region increases.   The plurality of reinforcing patterns are made of the same material as the wiring pattern, and are provided at the same height as the wiring pattern so as to be electrically insulated from the wiring pattern. Elastic wiring board.   The plurality of reinforcing patterns are linear patterns extending in the same direction as the expansion / contraction direction of the stretchable wiring board, and are provided so that the number of arrangements decreases as the distance from the boundary increases. The stretchable wiring board according to 1.   The plurality of reinforcing patterns are linear patterns extending in a direction orthogonal to the expansion / contraction direction of the stretchable wiring substrate, and are provided such that the arrangement density decreases as the distance from the boundary decreases. 2. The stretchable wiring board according to 2.   The plurality of reinforcing patterns are linear patterns extending in a direction orthogonal to the expansion / contraction direction of the stretchable wiring board, and are provided so as to become thinner as the distance from the boundary increases. Stretchable wiring board.   The stretchable wiring board according to claim 1, wherein the plurality of reinforcing patterns are granular patterns, and are provided such that the arrangement density decreases with distance from the boundary.   The stretchable wiring board according to claim 1, wherein the plurality of reinforcing patterns are granular patterns and are provided so as to become smaller as the distance from the boundary increases.   3. The stretchable wiring board according to claim 1, wherein the plurality of reinforcing patterns are arc-shaped patterns, and are provided such that the curvature of the arc decreases with distance from the boundary.   3. The stretchable wiring board according to claim 1, wherein the plurality of reinforcing patterns are densely provided closer to the wiring pattern in a plan view of the stretchable wiring board. A control device mounted on a non-wearing object,
A stretchable wiring board having a stretchable first region and a second region in which stretching is inhibited;
A fixing portion fixed to the second region of the stretchable wiring board,
The stretchable wiring board is
An insulating base material having elasticity;
A wiring pattern provided on the insulating substrate;
At least one first reinforcing pattern provided on the insulating base material in a region that is bent and stretched by the operation of the attached object in the first region, and having lower elasticity than the insulating base material. ,Control device. The stretchable wiring board is provided on the insulating base material in a region in contact with the boundary between the first region and the second region in the first region, and has a plurality of stretchability lower than the insulating base material. A second reinforcing pattern of
The control device according to claim 10, wherein the plurality of second reinforcing patterns are provided such that the degree of distribution gradually changes from dense to coarse as the distance from the boundary increases.   The stretchable wiring board according to any one of claims 1 to 9, further comprising a stretchable wiring board in which the insulating base material is formed in an annular shape, wherein the stretchable wiring board is an electron in the second region. An electronic device that is an area fixed to a component mounting part.

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