Winding component and power supply device

A winding component comprising:

• a core;
• a plate-shaped coil provided with regard to the core;
• a bobbin housing the coil;
• and
• a first positioning mechanism and a second positioning mechanism for positioning the bobbin and the coil relative to each other,
• wherein the bobbin has an opening, the coil is insertable in an insertion direction through the opening in manufacturing;
• wherein the first positioning mechanism has a first locking portion provided on one of the bobbin and the coil and a first engaging portion provided on the other of the bobbin and the coil and engaging the first locking portion;
• wherein the second positioning mechanism has a second locking portion provided on one of the bobbin and the coil and a second engaging portion provided on the other of the bobbin and the coil and engaging the second locking portion;
• wherein the first positioning mechanism further has a guide portion guiding the first engaging portion along the insertion direction toward the first locking portion when the coil is inserted into the bobbin;
• and
• wherein the second positioning mechanism has a hole portion receiving the second engaging portion, as the second locking portion.