WIRING BODY CONNECTION STRUCTURE
A wiring body connection structure includes: a first wiring body having a flexible substrate made of an elastomer, and a flexible wire containing an elastomer and a conductive material; and a second wiring body connected to the first wiring body. The first wiring body has a first connection portion on which the second wiring body is stacked in a front-back direction so as to be connected to the first connection portion, and a first body portion connecting to the first connection portion, and the width of the flexible substrate in the first connection portion is larger than that of the flexible substrate in the first body portion. The second wiring body has a second connection portion that is stacked on the first connection portion, and the second connection portion is formed by a wiring portion where a wire connected to the flexible wire of the first connection portion is disposed.
1 . A wiring body connection structure, characterized by comprising:
a first wiring body having a flexible substrate made of an elastomer, and a flexible wire disposed on the flexible substrate and containing an elastomer and a conductive material; and
a second wiring body connected to the first wiring body, wherein
the first wiring body has a first connection portion on which the second wiring body is stacked in a front-back direction so as to be connected to the first connection portion, and a first body portion connecting to the first connection portion, and a width of the flexible substrate in the first connection portion is larger than that of the flexible substrate in the first body portion, and
the second wiring body has a second connection portion that is stacked on the first connection portion, and the second connection portion is formed by a wiring portion where a wire connected to the flexible wire of the first connection portion is disposed, and two protruding portions protruding from both sides in a lateral direction of the wiring portion beyond the wiring portion in a direction of the first wiring body.
2 . The wiring body connection structure according to claim 1 , wherein
upon extension of the first wiring body, strain of the flexible wire near a boundary between the first connection portion and the first body portion is smaller than that of the flexible wire of the first body portion.
3 . The wiring body connection structure according to claim 1 , wherein
in the first connection portion, the width of the flexible substrate is at least 1.05 times that of a region where the flexible wire is disposed.
4 . The wiring body connection structure according to claim 1 , wherein
an end of the second connection portion in the direction of the first wiring body has a recessed shape formed by connecting the two protruding portions and the wiring portion by a curve, as viewed in the front-back direction.
5 . The wiring body connection structure according to claim 1 , wherein
the first wiring body has a plurality of the flexible wires,
the second wiring body has a plurality of the wires,
a conductive adhesive layer is placed between the first connection portion and the second connection portion, and
the conductive adhesive layer is made of an anisotropic conductive adhesive that allows the flexible wire and the wire facing each other in the front-back direction to be electrically connected to each other.
6 . The wiring body connection structure according to claim 1 , wherein
the first body portion has a cover film that insulates the flexible wire from outside.