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

Claim 8:
9. A coil device comprising:
a core comprising a winding core part, a first flange part at an axial end part of the winding core part, and a second flange part at another 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 first flange part and connected to one lead-out part of the first wire,
a second terminal electrode (i) on the mounting surface of the first flange part, (ii) spaced from the first terminal electrode and (iii) connected to one lead-out part of the second wire,
a third terminal electrode on the mounting surface of the second flange part and connected to a second lead-out part of the second wire, and
a fourth terminal electrode (i) on the mounting surface of the second flange part, (ii) spaced apart from the third terminal electrode and (iii) connected to a second lead-out part of the first wire, wherein
the first 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 opposite 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.