Patent ID: 7868726

Claim:
A winding method of regularly winding two wires on a bobbin that is rectangular in section, having a pair of ends in an axis direction and having four outer surfaces including a pair of parallel surfaces, the winding method including sequentially winding the wires in a row in the axis direction and turning back at each of the ends to be reciprocally wound, forming a coil with a plurality of rows and a plurality of layers of the wires, the method comprising the step of: winding the wires on the bobbin so that the wires advance obliquely together along the axis direction for a lane change corresponding to 0.5 wire diameters on one of the pair of parallel surfaces and for a lane change corresponding to 1.5 wire diameters on the other one of the pair of parallel surfaces, wherein an outermost layer of the plurality of layers forms a uniform profile along an axial direction of the bobbin.