A holder includes a first cover that covers a part of a corrugated tube in a radial direction of the corrugated tube, and a second cover engaged with the first cover and that covers a remaining part of the corrugated tube in the radial direction. A first retaining portion is formed on the first cover and is engaged in a groove on a bellows-shaped outer face of the corrugated tube. A second retaining portion is formed on the second cover and is engaged in the groove on the bellows-shaped outer face of the corrugated tube. The first cover includes a base portion and a pair of side wall portions extended vertically respectively from both ends of the base portion. The first retaining portion includes a first retaining piece which continuously extends from one of the side wall portions to the base portion and a second retaining piece which continuously extends from the other of the side wall portions to the base portion. The first retaining piece and the second retaining piece are separated from each other with air gap at the base portion.
1. A holder comprising:
a first cover that covers a first part of a corrugated tube in a radial direction of the corrugated tube; and
a second cover engaged with the first cover and that covers a second part of the corrugated tube in the radial direction,
wherein a first retaining portion is formed on the first cover and is engaged in a groove on a bellows-shaped outer face of the corrugated tube;
wherein a second retaining portion is formed on the second cover and is engaged in the groove on the bellows-shaped outer face of the corrugated tube;
wherein the first cover includes a base portion having a substantially flat portion and a pair of side wall portions extending vertically respectively from both a first end and a second end of the base portion;
wherein the first retaining portion includes a first retaining piece which protrudes and continuously extends from a surface of one of the side wall portions to the substantially flat portion of the base portion and a second retaining piece which protrudes and continuously extends from a surface of the other of the side wall portions to the substantially flat portion of the base portion; and
wherein the first retaining piece and the second retaining piece are separated from each other to form an air gap at the base portion.
2. The holder according to claim 1 , wherein the first retaining portion covers a radially-lower portion of a corrugated tube, and the second retaining portion covers a radially-upper portion of the corrugated tube.
3. The holder according to claim 1 , wherein the second cover includes a base portion and a pair of side wall portions extending vertically respectively from both ends of the base portion; and
wherein the second retaining portion continuously extends between the side wall portions of the second cover and is integrally formed on the base portion of the second cover.
4. The holder according to claim 1 , wherein the first cover further comprises:
two wire lead-out portions formed respectively at transversely-opposite side portions of the base portion.
5. The holder according to claim 4 , wherein the first cover further comprises:
two pairs of guide bars configured to engage the second cover.
6. The holder according to claim 5 , wherein each of the two pairs of guide bars has a transverse cross-section which is a generally semi-cylindrical shape.
7. The holder according to claim 1 , wherein the second cover includes a base portion and a pair of side wall portions extended vertically respectively from both ends of the base portion;
wherein the second retaining portion includes a first retaining piece which continuously extends from one of the side wall portions of the second cover to the base portion of the second cover and a second retaining piece which continuously extends from the other of the side wall portions of the second cover to the base portion of the second cover; and
wherein the first retaining piece and the second retaining piece of the second retaining portion are separated from each other with air gap at the base portion of the second cover.