公开(公告)号：US20240331919A1

公开(公告)日：2024-10-03

申请号：US18616735

申请日：2024-03-26

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Koji SHIMURA ,  Kyosuke INUI

IPC: H01F27/255 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F27/2823

Abstract: A coil device comprises a first magnetic material portion containing a magnetic material and having a plate-shaped portion and a protrusion protruding, a metal wire having a winding portion including two or more layers of winding layers, and a second magnetic material portion containing a magnetic material and a resin, having a content ratio of the magnetic material smaller than that of the first magnetic material portion, and covering at least an outer peripheral side of the winding portion, wherein inter-wire spaces defined by circumscribed circles circumscribing three different wire cross sections and having a diameter smaller than a radius of each wire cross section are formed, and first inter-wire spaces not including a magnetic material and second inter-wire spaces including a magnetic material are included in the inter-wire spaces.

公开(公告)号：US20240282516A1

公开(公告)日：2024-08-22

申请号：US18441263

申请日：2024-02-14

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Keigo HIGASHIDA ,  Fuyuki MIURA ,  Ryosuke IINUMA

IPC: H01F41/082 ,  H01F5/02 ,  H01F27/28 ,  H01F41/076

CPC classification number: H01F41/082 ,  H01F5/02 ,  H01F27/2828 ,  H01F41/076

Abstract: A coil device includes a winding portion having a wire spirally wound. The winding portion has at least one boundary region. The at least one boundary region divides the winding portion into divided sections along a winding axis of the winding portion.

公开(公告)号：US20240177915A1

公开(公告)日：2024-05-30

申请号：US18523018

申请日：2023-11-29

Applicant: TDK CORPORATION

Inventor： Naoto TSUKAMOTO ,  Satoru KUROKAWA ,  Tomohiko AIDA ,  Masashi GOTOH ,  Hirofumi SASAKI ,  Ryuji ANDO

IPC: H01F27/255 ,  H01F27/29 ,  H01F41/02

CPC classification number: H01F27/255 ,  H01F27/292 ,  H01F41/0246

Abstract: A coil component includes an exterior body, a coil positioned inside the exterior body, and terminal electrodes arranged on a surface of the exterior body and connected to lead parts of the coil. The exterior body is a columnar shape or a polyhedron shape, and includes a first plane for arranging the terminal electrodes, a second plane opposing the first plane, and one or more connecting planes connecting the first plane and the second plane; and the exterior body has a jagged edge on at least part of an edge positioned between the second plane and the one or more connecting planes.

公开(公告)号：US20230245812A1

公开(公告)日：2023-08-03

申请号：US18161332

申请日：2023-01-30

Applicant: TDK CORPORATION

Inventor： Naoto TSUKAMOTO ,  Sena YOSHINO ,  Tomohiko AIDA ,  Shigeki YANAGIDA ,  Masashi GOTOH ,  Hirofumi SASAKI ,  Hitoshi SASAKI

IPC: H01F27/255 ,  H01F41/02 ,  H01F27/28 ,  H01F27/30

CPC classification number: H01F27/255 ,  H01F41/0246 ,  H01F27/2823 ,  H01F27/306

Abstract: A coil device 1 comprises a coil 10, a T-shaped core 20 including a columnar portion 21 around which the coil 10 is disposed and a flange 22 formed at a first end 21a of the columnar portion 21 in an axial direction thereof, and an exterior body 30 covering the coil 10 and the columnar portion 21 and made of an exterior material including magnetic particles and a resin. The core 20 is provided with a recess 40 including at least one of a first recess 41 or a second recess 42. The first recess 41 extends between the first end 21a and a second end 21b of the columnar portion 21 in the axial direction. The second recess 42 extends from an inner side towards an outer side of the flange 22.

公开(公告)号：US20240331923A1

公开(公告)日：2024-10-03

申请号：US18616818

申请日：2024-03-26

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Koji SHIMURA ,  Kyosuke INUI

IPC: H01F27/28

CPC classification number: H01F27/2823

Abstract: A coil device comprises a first magnetic material portion containing a magnetic material and having a plate-shaped portion and a protrusion, a metal wire having a winding portion including two or more layers of winding layers wound around the protrusion; and a second magnetic material portion containing a magnetic material and a resin, having a content ratio of the magnetic material smaller than that of the first magnetic material portion, and covering at least an outer peripheral side of the winding portion, wherein a set of wire cross sections is deformed with respect to a perfect circle such that a center-to-center distance of at least one set of adjacent wire cross sections is shorter than in case that the set of wire cross sections is a perfect circle, viewed in a predetermined cross section including a winding axis of the winding portion.

公开(公告)号：US20240282507A1

公开(公告)日：2024-08-22

申请号：US18441214

申请日：2024-02-14

Applicant: TDK CORPORATION

Inventor： Hirofumi SASAKI ,  Fuyuki MIURA ,  Ryosuke IINUMA

IPC: H01F27/28 ,  H01F27/02 ,  H01F27/255

CPC classification number: H01F27/28 ,  H01F27/255 ,  H01F27/02

Abstract: A coil device includes: a conductor including a winding portion and a leadout portion led out from the winding portion; a first core including a center core portion disposed inside the winding portion in a radial direction and a side wall portion surrounding the winding portion; and a plate-shaped second core attached to one end of the side wall portion in an axial direction. The side wall portion has a cutout portion formed at the one end of the side wall portion in the axial direction to pass the leadout portion. The cutout portion is cut toward another end of the side wall portion in the axial direction. At least a part of the leadout portion is exposed to an outside through the cutout portion.

公开(公告)号：US20220328242A1

公开(公告)日：2022-10-13

申请号：US17701920

申请日：2022-03-23

Applicant: TDK CORPORATION

Inventor： Takashi ISHII ,  Takashi KUDO ,  Hirofumi SASAKI

IPC: H01F27/30 ,  H01F27/29 ,  H01F27/28 ,  H01F27/24

Abstract: A coil device includes: an inner core including a winding core portion wound by a wire, an upper flange portion with a first end portion on one side of the winding core portion, and a lower flange portion with a second end portion on the other side of the winding core portion; an outer core having an insertion hole and disposed outside the inner core, the inner core being inserted to the insertion hole; and a pair of terminal portions on the outer core, lead portions of the wire connect to the terminal portions. The number of wire turns along a radial direction of the winding core portion is larger on one side of the winding core portion than on the other side, and a wire winding end position is at the first end portion on the one side of the winding core portion with a wire winding start position.