Patent ID: 11948717
Assignee: TDK CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A coil device comprising:
a drum core, the drum core comprising:
a first flange portion having a first flange surface;
a second flange portion having a second flange surface; and
a winding core portion disposed between the first and second flange portions;

a coil wound around the winding core portion;
a plate core connected to the first flange surface at a first direction side and the second flange surface at the first direction side, the plate core comprising:
a first projecting portion protruding toward the first flange surface and having a first flat surface facing the first flange surface;
a second projecting portion protruding toward the second flange surface and having a second flat surface facing the second flange surface;
a first wall surface extending from the first flat surface in a direction away from the first flange surface, the first wall surface having a first inner wall surface extending from the first flat surface at a side close to the second flat surface; and
a second wall surface extending from the second flat surface in a direction away from the second flange surface, the second wall surface having a second inner wall surface extending from the second flat surface at a side close to the first flat surface;

a first electrode terminal provided on the first flange portion, one end portion of the coil being electrically connected on the first electrode terminal;
a second electrode terminal provided on the second flange portion, another end portion of the coil being electrically connected on the second electrode terminal;
a first cured-adhesive portion bonding the first flange surface and the first flat surface that is also in contact with the first wall surface, the first cured-adhesive portion being in contact with the first inner wall surface; and
a second cured-adhesive portion bonding the second flange surface and the second flat surface that is also in contact with the second wall surface, the second cured-adhesive portion being in contact with the second inner wall surface,
wherein the drum core and the plate core are connected by abutting and bonding the first flange surface against the first flat surface and by abutting and bonding the second flange surface against the second flat surface.