Curvature restraining member and power feeding device

1. A curvature restraining member in which a wire harness includes an electric wire and a flexible tube through which the electric wire is inserted, the curvature restraining member being placed between an inner surface of the flexible tube and the electric wire in the wire harness, and the curvature restraining member restraining the wire harness from curving with a radius of curvature smaller than a reference radius in a predetermined curving direction, the curvature restraining member comprising:

a body portion placed near at least one end of the flexible tube and extending straightly; and

a curved portion extending from one end of the body portion opposite from the one end of the flexible tube, formed unfoldably with respect to the body portion, and curving in the curving direction with a radius of curvature not less than the reference radius and with a length that fits in the flexible tube when the flexible tube straightly extends.

2. The curvature restraining member according to claim 1 , wherein

the body portion is formed into a shape forming a portion of a cylinder through which the electric wire passes, and

the curvature restraining member includes a lid openably connected through a hinge to one side edge of a pair of side edges extending in the length direction of the electric wire in the body portion, and having a shape forming the other portion of the cylinder.

3. The curvature restraining member according to claim 2 , wherein

a plurality of first ribs projecting in a direction intersecting with a peripheral wall of the cylinder is arranged along the other side edge of the pair of side edges of the body portion at a distance from each other, and

a plurality of second ribs projecting in the direction intersecting with the peripheral wall is placed on a side edge opposite from the hinge, of the pair of side edges projecting in the length direction of the electric wire in the lid, and is arranged between the first ribs when the lid is closed, so as to stand in a line with the first ribs.

4. The curvature restraining member according to claim 3 , wherein

a groove extending in a length direction of the flexible tube is formed in an inner surface of the flexible tube, and

the first ribs and the second ribs which are arranged in the line when the lid is closed are fitted into the groove.

5. The curvature restraining member according to claim 1 , further comprising a flexible portion formed such that a flexible property thereof is capable of being curved until a curved shape which is continuous with the curved portion is formed, and is incapable of being curved with a radius of curvature smaller than the curved shape, wherein the flexible portion is connected to one end of the curved portion opposite from the body portion through a hinge so as to be curved until the curved shape is formed, and to be curved with the radius of curvature smaller than the curved shape.

6. The curvature restraining member according to claim 2 , further comprising a flexible portion formed such that a flexible property thereof is capable of being curved until a curved shape which is continuous with the curved portion is formed, and is incapable of being curved with a radius of curvature smaller than the curved shape, wherein the flexible portion is connected to one end of the curved portion opposite from the body portion through a hinge so as to be curved until the curved shape is formed, and to be curved with the radius of curvature smaller than the curved shape.

7. The curvature restraining member according to claim 3 , further comprising a flexible portion formed such that a flexible property thereof is capable of being curved until a curved shape which is continuous with the curved portion is formed, and is incapable of being curved with a radius of curvature smaller than the curved shape, wherein the flexible portion is connected to one end of the curved portion opposite from the body portion through a hinge so as to be curved until the curved shape is formed, and to be curved with the radius of curvature smaller than the curved shape.

8. The curvature restraining member according to claim 4 , further comprising a flexible portion formed such that a flexible property thereof is capable of being curved until a curved shape which is continuous with the curved portion is formed, and is incapable of being curved with a radius of curvature smaller than the curved shape, wherein the flexible portion is connected to one end of the curved portion opposite from the body portion through a hinge so as to be curved until the curved shape is formed, and to be curved with the radius of curvature smaller than the curved shape.

9. A power-feeding device which electrically connects a vehicle body and a sliding door through a wire harness in a vehicle having the sliding door, wherein the wire harness includes an electric wire and a flexible tube through which the electric wire is inserted, the power feeding device comprising:

a supporting member fixed to the vehicle body or the sliding door;

a swinging member holding one end of the flexible tube and pivotally supported by the supporting member such that the swinging member can swing around a swinging axis parallel to the sliding door and vertical to an opening/closing direction of the sliding door; and

a curvature restraining member placed between an inner surface of the flexible tube and the electric wire for restraining the wire harness from curving in a predetermined curving direction with a radius of curvature smaller than a reference radius, wherein the curvature restraining member includes a body portion placed near at least one of ends of the flexible tube and extending straightly, and a curved portion extending from one end of the body portion opposite from the one end of the flexible tube, formed unfoldably with respect to the body portion, and curving in the curving direction with a radius of curvature not less than the reference radius and with a length that fits in the flexible tube when the flexible tube straightly extends.