公开(公告)号：US12106888B2

公开(公告)日：2024-10-01

申请号：US17144383

申请日：2021-01-08

Applicant: TDK CORPORATION ,  TDK KOREA CORPORATION

Inventor： Hiroyuki Iwata ,  Kiyofumi Fujiwara ,  Sepung Ki ,  Chihu An

IPC: H01F17/04 ,  H01F27/24 ,  H01F27/28 ,  H01F27/29

CPC classification number: H01F27/29 ,  H01F27/24 ,  H01F27/2823

Abstract: A coil device including a magnetic core having a winding core around which a wire is wound to form a coil, and four terminal electrodes attached to an outer end surface of a flange formed at an end of the winding core along a winding axis. A recess is formed on the outer end surface of the flange, and each of the terminal electrodes includes a first rising piece loosely entering the recess, and a mounting piece integrally formed with the first rising piece and adhered to the outer end surface of the flange.

公开(公告)号：US12119154B2

公开(公告)日：2024-10-15

申请号：US17209761

申请日：2021-03-23

Applicant: TDK CORPORATION ,  TDK KOREA CORPORATION

Inventor： Kiyofumi Fujiwara ,  Hiroyuki Iwata ,  Eietsu Abe ,  Sepung Ki ,  Chihu An

IPC: H01F27/28 ,  H01F17/04 ,  H01F27/29

CPC classification number: H01F17/045 ,  H01F27/2823 ,  H01F27/292

Abstract: The present invention provides a coil device which includes two coil elements in the same device and achieves an improved wire occupancy. The coil device includes a core including a winding core, and a winding wire part of which a first wire and a second wire are wound in a plurality of layers around the winding core, wherein the winding wire part includes a first part in which the first wire and the second wire of a same turn are wound adjacent to each other on a same layer, and a second part in which the first wire and the second wire of a same turn are wound in different layers without being adjacent to each other.

公开(公告)号：US10170234B2

公开(公告)日：2019-01-01

申请号：US15003602

申请日：2016-01-21

Applicant: TDK CORPORATION

Inventor： Hiroyuki Iwata ,  Nobuo Takagi ,  Hiroyuki Abe ,  Koji Shimura

IPC: H01F27/29 ,  H01F17/00 ,  H01F17/04 ,  H01F27/30

Abstract: A coil device includes a magnetic core and terminal electrodes. The terminal electrodes include attachment pieces, wire connection rising pieces, connection pieces, and fillet forming pieces. The wire connection rising pieces are integrally risen from one ends in a longitudinal direction of the attachment pieces along a side surface in the X-axis direction of a flange. The connection pieces are integrally formed with upper end sides of the wire connection rising pieces and have welded balls connected to lead parts of a wire by laser welding. The fillet forming pieces are integrally risen from one ends in a lateral direction crossing the longitudinal direction of the attachment pieces along a side surface in the Y-axis direction of the flange. Laser shielding members are arranged between the welded balls and the flange of a magnetic core.