Stretchable electronic device
According to an aspect, a stretchable device includes: a resin base member; and a strain gauge, a signal line, and an output line stacked on the resin base member. The resin base member includes: a plurality of bodies disposed separately from each other; and a plurality of hinges that couple the bodies adjacently disposed while meandering in an intersecting direction intersecting an imaginary line that couples the bodies adjacently disposed. The hinges include a first hinge and a second hinge that couple the bodies adjacently disposed. A meander length of the second hinge in the intersecting direction is longer than a meander length of the first hinge in the intersecting direction. The strain gauge is provided to the first hinge. The signal line and the output line are provided to the second hinge.
1 . A stretchable device comprising:
a resin base member; and
a strain gauge, a signal line, and an output line stacked on the resin base member, wherein
the resin base member includes:
a plurality of bodies disposed separately from each other; and
a plurality of hinges that couple the bodies adjacently disposed while meandering in an intersecting direction intersecting an imaginary line that couples the bodies adjacently disposed,
the hinges include a first hinge and a second hinge that couple the bodies adjacently disposed,
a meander length of the second hinge in the intersecting direction is longer than a meander length of the first hinge in the intersecting direction,
the strain gauge is provided to the first hinge, and
the signal line and the output line are provided to the second hinge.
2 . The stretchable device according to claim 1 , wherein
the bodies are disposed in a matrix having a row-column configuration, and
the intersecting direction is parallel to a planar direction in which the bodies are arrayed.
3 . The stretchable device according to claim 2 , wherein
the first hinge has a first coupling portion having a small amount of deformation when the first hinge expands and contracts,
the second hinge has a second coupling portion having a small amount of deformation when the second hinge expands and contracts, and
the first coupling portion and the second coupling portion intersect each other.
4 . The stretchable device according to claim 2 , wherein the first hinge and the second hinge are separated in the planar direction.
5 . The stretchable device according to claim 4 , wherein
the bodies each have a rectangular shape with four sides and four corners when viewed in the planar direction,
the first hinge and the second hinge are provided for each of the four sides and coupled to the side in a manner separated in a direction parallel to the side, and
two of the hinges disposed sandwiching one of the corners are the first hinge coupled to one of the sides that sandwich the one corner and the second hinge coupled to the other of the sides that sandwich the one corner.
6 . The stretchable device according to claim 4 , wherein
the bodies each have a rectangular shape with four sides and four corners when viewed in the planar direction,
the first hinge and the second hinge are provided for each of the four sides and coupled to the side in a manner separated in a direction parallel to the side, and
coupling positions of the first hinge and the second hinge that are coupled to one of two sides that are in an opposite side relation are arranged alternately with coupling positions of the first hinge and the second hinge that are coupled to the other of the two sides.
7 . The stretchable device according to claim 1 , wherein
the bodies are disposed in a matrix having a row-column configuration, and
the intersecting direction is orthogonal to a planar direction in which the bodies are arrayed.
8 . The stretchable device according to claim 1 , comprising a gate line stacked on the second hinge.
9 . The stretchable device according to claim 1 , wherein
the resin base member has a first surface facing the strain gauge, the signal line, and the output line, and
at least one of the strain gauge, the signal line, and the output line is in contact with the first surface.