Patent ID: 7999648

Claim:
A wire-wound coil comprising: a core member including a core portion and collar portions formed at either end of the core portion; the core portion including a prior turn section and an adjacent subsequent turn section; the prior turn section has a first position and a second position, the first and second positions being at a predetermined distance apart from each other; the subsequent turn section has a first position and a second position, the first and second positions being at a predetermined distance apart from each other; the second position of the prior turn section being adjacent to the first position of the subsequent turn section; a pair of windings including a primary winding part and a secondary winding part wound around a surface of the core portion; and electrode portions formed on the collar portions, wherein ends of the primary winding part and ends of the secondary winding part of the windings are connected to the electrode portions, wherein at least one portion of the primary winding part positioned at the first position in the prior turn section and at least one portion of the secondary winding part positioned at the second position in the prior turn section are separated from each other by the predetermined distance between the first position and the second position of the prior turn section; at least another portion of the primary winding part positioned at the first position in the subsequent turn section and at least another portion of the secondary winding part positioned at the second position in the subsequent turn section are separated from each other by the predetermined distance between the first position and the second position of the subsequent turn section, and the at least one portion of the secondary winding part at the second position in the prior turn section is in contact with the at least another portion of the primary winding part at the first position in the adjacent subsequent turn section, the at least one portion of the secondary winding part at the second position in the prior turn section and the at least another portion of the primary winding part at the first position in the subsequent turn section being adjacent to each other on the same surface of the core portion.