Multiple wire terminal connecting structure

1. A multiple wire terminal connection structure for a plurality of electric wires, each having a core wire coated with an insulation coating, the structure comprising:

a plurality of terminals to be connected to the electric wires, respectively,

wherein each of the terminals comprises:

a connection portion configured to be connected to a portion of a corresponding one of the electric wires from which the insulation coating is stripped off such that the core wire is exposed, and

an extension portion extending from the connection portion in an extension direction and to be connected to a terminal member of a counterpart connection device, and

wherein the extension portions are each formed to have a cross section, in a direction perpendicular to the extension direction of the extension portion, of an arc shape and are arranged such that the cross sections of the extension portions are arranged in a substantially circular manner and such that the extension portions are spaced from each other in a circumferential direction, the circumferential direction being perpendicular to the extension direction.

2. The multiple wire terminal connection structure according to claim 1 , further comprising a plurality of spring parts configured to contact the extension portions and the terminal members such that the extension portions and the terminal members are electrically connected to each other,

wherein the plurality of spring parts are each extended to have a cross section of an arc shape and are arranged such that the cross sections of the spring parts are arranged in a substantially circular manner and such that the spring parts are spaced from each other in the circumferential direction, and

wherein the plurality of spring parts are elastically deformable independently of the extension portions of the plurality of terminals.

3. The multiple wire terminal connection structure according to claim 1 , wherein the terminals are arranged such that axial centers of the arc shapes of the extension portions extend along a direction intersecting a direction of the electric wires extend.

4. The multiple wire terminal connection structure according to claim 3 , further including a sealing member configured to hermetically enclose the terminals from an outside,

wherein the sealing member comprises a bottom part and a lid part that are arranged in front and back in the intersecting direction, and the bottom part and the lid part are assembled together to form a unitary body.