Stretchable device
According to an aspect, a stretchable device includes: a resin base member including a plurality of island-shaped portions spaced apart from each other and a plurality of strip portions that couple the island-shaped portions; and a first gauge line and a second gauge line having a gauge factor higher than a gauge factor of the first gauge line, the first gauge line and the second gauge line being provided to each of the strip portions. The first gauge line and the second gauge line each extend along an extending direction of the strip portion and are coupled along the extending direction of the strip portion. The length of the second gauge line along the extending direction of the strip portion is shorter than the length of the first gauge line along the extending direction of the strip portion.
1 . A stretchable device comprising:
a resin base member comprising a plurality of island-shaped portions spaced apart from each other and a plurality of strip portions that couple the island-shaped portions; and
a first gauge line and a second gauge line having a gauge factor higher than a gauge factor of the first gauge line, the first gauge line and the second gauge line being provided to each of the strip portions, wherein
the first gauge line and the second gauge line each extend along an extending direction of the strip portion and are coupled along the extending direction of the strip portion, and
the length of the second gauge line along the extending direction of the strip portion is shorter than the length of the first gauge line along the extending direction of the strip portion.
2 . The stretchable device according to claim 1 , wherein
the strip portion of the resin base member comprises a plurality of curved portions and a linear portion that couples the curved portions,
the stretchable device comprises a plurality of the first gauge lines and at least one the second gauge line,
the first gauge lines are provided to the linear portion and part of the curved portions, and
the second gauge line is provided to part of the curved portions and is coupled between the first gauge lines along an extending direction of the curved portions.
3 . The stretchable device according to claim 2 , wherein the length of the second gauge line is shorter than the length of the first gauge lines in each of the curved portions.
4 . The stretchable device according to claim 1 , wherein
the strip portion of the resin base member comprises a base coupled to the island-shaped portion and linearly extending from the island-shaped portion and a curved portion coupled to the base,
the stretchable device comprises a plurality of the first gauge lines and at least one the second gauge line,
the first gauge lines are provided to the curved portion and part of the base, and
the second gauge line is provided to part of the base and is coupled between the first gauge lines along an extending direction of the base.
5 . The stretchable device according to claim 4 , wherein the length of the second gauge line is shorter than the length of the first gauge lines in the one base.
6 . The stretchable device according to claim 1 , wherein the strip portion of the resin base member comprises:
a first curved portion;
a linear portion coupled to the first curved portion; and
a second curved portion coupled to the linear portion,
each of the first curved portion and the second curved portion is divided into an inner peripheral portion positioned on an inner peripheral side and an outer peripheral portion positioned on an outer peripheral side with respect to the center in a width direction orthogonal to the extending direction of the strip portion serving as a boundary,
the inner peripheral portion of the first curved portion and the inner peripheral portion of the second curved portion are positioned on opposite sides with respect to the center in the width direction, and
the first gauge line and the second gauge line are provided overlapping one of the inner peripheral portion and the outer peripheral portion alone in the first curved portion and the second curved portion.
7 . The stretchable device according to claim 6 , wherein
the first gauge line is provided across the first curved portion, the linear portion, and part of the second curved portion, and
the first gauge line comprises an intersection extending in the width direction in the linear portion and coupling the first gauge line in the first curved portion to the first gauge line in the second curved portion.
8 . The stretchable device according to claim 1 , further comprising:
a signal line stacked on the resin base member, wherein
the signal line is provided along the extending direction of the strip portion and disposed overlapping the center in a width direction orthogonal to the extending direction of the strip portion, and
the first gauge line and the second gauge line extend in an extending direction of the signal line and are provided overlapping the signal line.
9 . The stretchable device according to claim 8 , wherein the width of the strip portion is equal to the width of the signal line.
10 . The stretchable device according to claim 1 , wherein
the first gauge line is made of metal material or alloy having a first gauge factor, and
the second gauge line is made of semiconductor material having a second gauge factor higher than the first gauge factor.