Winding structure, coil winding, coil part, and coil winding manufacturing method
There is provided a winding structure, a coil winding, a coil part, and a coil winding manufacturing method, which are capable of preventing occurrence of an extra space due to existence of a connecting wire part when two winding parts and a connecting wire part connecting the winding parts are formed.
1. A coil winding, comprising:
a first winding part formed by winding a flat wire;
a second winding part formed by winding the flat wire continuing to the first winding part, the second winding part being wound in a same winding direction as a winding direction of the first winding part; and
a connecting wire part located between the first winding part and the second winding part to connect the winding parts, wherein
the connecting wire part has:
an interval defining portion defining an interval between the first winding part and the second winding part;
a first coupling portion with one end side continuing to the interval defining portion and another end side continuing to the first winding part on one side in a first axial that is an axial direction of the first winding part; and
a second coupling portion with one end side continuing to the interval defining portion and another end side continuing to the second winding part on another side in a second axial that is an axial direction of the second winding part,
at least one of the first coupling portion and the second coupling portion becomes a twisted portion by twisting by approximately 180 degrees in total, and
a boundary portion between the first coupling portion and the first winding part is bent so that the first coupling portion extends in the first axial direction to depart from the first winding part, and
a boundary portion between the second coupling portion and the second winding part is bent so that the second coupling portion extends in the second axial direction to depart from the second winding part.
2. The coil winding according to claim 1 , wherein
numbers of windings of the first winding part and the second winding part are equal.
3. The coil winding according to claim 1 , wherein
the first coupling portion and the second coupling portion continue to the interval defining portion by forming an edgewise bending in a same direction as a winding direction of the first winding part, and
either one of the first coupling portion and the second coupling portion is provided with a twisted portion by twisting by approximately 180 degrees.
4. The coil winding according to claim 1 , wherein
extending directions of the first coupling portion and the second coupling portion are same as an extending direction of the interval defining portion, and
both the first coupling portion and the second coupling portion are provided with twisted portions by twisting each by approximately 90 degrees in a same direction.
5. The coil winding according to claim 3 , wherein
a first terminal on a side opposite to the first coupling portion in the first winding part and a second terminal on a side opposite to the second coupling portion in the second winding part have front end sides extending in a same direction.
6. The coil winding according to claim 4 , wherein
a first terminal on a side opposite to the connecting wire part in the first winding part and a second terminal on a side opposite to the connecting wire part in the second winding part have front end sides extending in opposite directions from each other.
7. A coil winding according to claim 4 , wherein
a boundary portion between the first coupling portion and the interval defining portion and a boundary portion between the second coupling portion and the interval defining portion are bent so that the first winding part and the second winding part are located on a same side in the axial direction.
8. The coil winding according to claim 1 , wherein
a first terminal on a side opposite to the connecting wire part in the first winding part and a second terminal on a side opposite to the connecting wire part in the second winding part have front end sides extending in a same direction, and
one of the first terminal and the second terminal is located on an facing portion side where the first winding part and the second winding part face each other, and the other of the first terminal and the second terminal is located on an outer peripheral side where the first winding part and the second winding part do not face each other.
9. A coil part, comprising:
the coil winding according to claim 1 ; and
a core body formed from a magnetic material, provided in a ring shape, and inserted through a center hole of the first winding part and a center hole of the second winding part.