Patent ID: 8471666

Claim:
An insulating coil bobbin having a tubular section about which two conductive coil windings are wound, the coil bobbin further having: a flat-shaped flange section which projects outwards from substantially a central portion of the tubular section in a plane which is perpendicular to an axis line of the tubular section; a first projecting section which projects toward outside from the tubular section with respect to the axis line at a position separated from the flange section, the first projecting section projecting further toward outside than a first coil winding, which has two or more turns, of the two coil windings, when the first coil winding is wound on a first end side, this first end side being one end side of the tubular section as divided by the flange section and being the side where the first coil winding is wound; a second projecting section, which is provided so as to be sandwiched between adjacent windings when the first coil winding is wound on the first end side and which projects toward outside from the tubular section with respect to the axis line, in a direction different from the first projecting section when viewed in the axis line direction; and a third projecting section which projects toward outside from the tubular section with respect to the axis line at a position separated from the flange section, the third projecting section projecting further toward outside than a second coil winding, which is different from the first coil winding, of the two coil windings, and which has one or more turns, when the second coil winding is wound on a second end side, this second end side being a different end side from the first end side of the tubular section and being a side where the second coil winding is wound, wherein the flange section has an outer diameter larger than an outer diameter of the coil windings and comprises a side wall section extending in the axis line direction from an outer circumferential edge thereof, and a height of the side wall section in the axis line direction is greater than a thickness of a coil winding provided in the direction in which the side wall section extends, and the side wall section further has a hook section which extends in the axis line direction from an end of the side wall section that is different from an end on a side of the flange section.