Stretchable device
According to an aspect, a stretchable device includes: a resin base member; and a signal line and a strain gauge 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 while meandering. The hinges each include: a plurality of bends that bend and are disposed between the bodies; and a base that linearly extends to couple one of the bodies to a corresponding one of the bends. The signal line includes: a bend signal line stacked on the bends; and a base signal line stacked on the base. The base signal line has an occupied area per unit length in a length direction of the signal line larger than the bend signal line when viewed in a stacking direction in which the signal line is stacked on the resin base member.
1. A stretchable device comprising:
a resin base member; and
a signal line and a strain gauge stacked on the resin base member, wherein
the resin base member comprises:
a plurality of bodies disposed separately from each other; and
a plurality of hinges that couple the bodies while meandering,
the hinges each comprise:
a plurality of bends that bend and are disposed between the bodies; and
a base that linearly extends to couple one of the bodies to a corresponding one of the bends,
the signal line comprises:
a bend signal line stacked on the bends; and
a base signal line stacked on the base, and
the base signal line has an occupied area per unit length in a length direction of the signal line larger than the bend signal line when viewed in a stacking direction in which the signal line is stacked on the resin base member.
2. The stretchable device according to claim 1 , wherein
the base signal line comprises:
a signal line body that has the same width as a width of the bend signal line when viewed in the stacking direction and is coupled to the bend signal line; and
a dummy wiring line disposed separately from the signal line body.
3. The stretchable device according to claim 2 , wherein a width of the bend signal line is shorter than a width of the strain gauge when viewed in the stacking direction.
4. The stretchable device according to claim 1 , wherein
the base signal line comprises a signal line body coupled to the bend signal line, and
a width of the signal line body is larger than a width of the base signal line when viewed in the stacking direction.
5. The stretchable device according to claim 4 , wherein a width of the bend signal line is shorter than a width of the strain gauge when viewed in the stacking direction.
6. The stretchable device according to claim 1 , wherein a width of the bend signal line is shorter than a width of the strain gauge when viewed in the stacking direction.
7. A stretchable device comprising:
a resin base member; and
a signal line and a strain gauge stacked on the resin base member, wherein
the resin base member comprises:
a plurality of bodies disposed separately from each other; and
a plurality of hinges that couple the bodies while meandering,
the hinges each comprise:
a plurality of bends that bend and are disposed between the bodies; and
a base that linearly extends to couple one of the bodies to a corresponding one of the bends,
the signal line comprises:
a bend signal line stacked on the bends; and
a base signal line stacked on the base,
the base signal line comprises a signal line body coupled to the bend signal line, and
an annular portion having an annular shape when viewed in a stacking direction in which the signal line is stacked on the resin base member is provided to at least part of the signal line body.
8. The stretchable device according to claim 7 , wherein the annular portion is provided to at least part of the bend signal line.
9. The stretchable device according to claim 8 , wherein a width of the bend signal line is shorter than a width of the strain gauge when viewed in the stacking direction.
10. The stretchable device according to claim 7 , wherein a width of the bend signal line is shorter than a width of the strain gauge when viewed in the stacking direction.