Patent ID: 11935679
Assignee: TDK CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A coil device comprising:
a core comprising a winding core part and a flange part at an axial end part of the winding core part,
a coil part comprising a first wire and a second wire wound around the winding core part,
a first terminal electrode on a mounting surface of the flange part and to which a lead-out part of the first wire is connected, and
a second terminal electrode (i) on the mounting surface of the flange part, (ii) spaced from the first terminal electrode along the mounting surface and (iii) to which a lead-out part of the second wire is connected, wherein
the flange part comprises a concave part and a wall,
a bottom surface of the concave part is located closer to one of the first terminal electrode and the second terminal electrode than to another of the first terminal electrode and the second terminal electrode between the first terminal electrode and the second terminal electrode,
the wall (i) includes a first side surface defined by the concave part and a second side surface defined by an inner end surface of the flange part at the axial end part and (ii) extends upwardly from the bottom surface of the concave part between the concave part and the inner end surface of the flange part,
the first side surface and the second side surface are opposing surfaces,
the concave part has the bottom surface, the first side surface, a first facing surface and a second facing surface facing the first facing surface,
the first side surface, the first facing surface and the second facing surface extend upwardly from the bottom surface, and
the first side surface is connected to the first facing surface and the second facing surface.