Patent ID: 8680961

Claim:
Reactor having a case and a cylindrical coil assembly stored in the case and formed to have a coil covered with resin, an iron-resin composite containing iron powder for sealing the coil assembly, wherein the reactor comprises a pillar integrally formed with the case and one or a plurality of ring-shaped core members, the ring-shaped core member or members are provided outside an outer peripheral surface of the pillar such that the pillar is inserted inside an inner peripheral surface of the ring-shaped core member or members, the coil assembly is provided outside an outer peripheral surface of the ring-shaped core member or members such that the ring-shaped core member or members are inserted inside an inner peripheral surface of the coil assembly, and the ring-shaped core member or members are sealed with the iron-resin composite, the reactor includes a bobbin having an opening formed with an end surface and a side wall extending vertically from a peripheral edge of the end surface, the bobbin is provided inside an inner peripheral surface of the coil assembly so as to cover the ring-shaped core member or members, the bobbin has a flange on an opening end portion of the bobbin, and an axial end face of the coil assembly is in contact with the flange.