Wire feeding unit and wire bending apparatus including the same

2:

• The wire feeding unit of claim 1, wherein each of the plurality of idlers has a guide groove formed on an outer circumferential surface thereof to allow the wire to be seated therein.

3:

• The wire feeding unit of claim 2, wherein the surface friction between the guide groove and the wire prevents the wire from escaping through surface friction over surface friction between the metal material and the wire.

4:

• The wire feeding unit of claim 2, wherein a depth of the guide groove is formed to be equal to a radius of the wire and a surface of the guide groove is in contact with a half of an outer circumferential surface of the wire.

5:

• The wire feeding unit of claim 1, wherein the plurality of idlers are positioned so as to correspond to each of the plurality of driven rollers.

6:

• The wire feeding unit of claim 5, further comprising a cover portion having an auxiliary guide which is a groove for guiding the wire in an auxiliary manner along an arrangement of the plurality of idlers.