公开(公告)号：US20230290558A1

公开(公告)日：2023-09-14

申请号：US18177419

申请日：2023-03-02

Applicant: TDK CORPORATION

Inventor： Taichi WATANABE ,  Keigo Higashida ,  Hanako Yoshino

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

CPC classification number: H01F17/045 ,  H01F27/2828 ,  H01F27/29

Abstract: A coil device includes first and second wires, a drum core having a winding part around which the wires are wound. The drum core has first and second flanges formed at different ends of the winding core part along the first axis. First and second terminals which connect with the first wire are formed at the first flange, and third and fourth terminals which connect with the second wire are formed at the second flange. The first wire has a first coil part having a winding width W1 wound around the winding core part, and the second wire has a second coil part having a winding width W2 wound around the winding core part. The first coil part is arranged closer to the first flange and it is spaced apart from the second coil part by taking a distance W3, and W3>W1 or W3>W2 is satisfied.

公开(公告)号：US20250118483A1

公开(公告)日：2025-04-10

申请号：US18901644

申请日：2024-09-30

Applicant: TDK CORPORATION

Inventor： Taichi WATANABE ,  Tatsuya SATO ,  Yugo ASAI

IPC: H01F27/29 ,  H01F27/30

Abstract: A coil device includes a winding section comprised of a wound wire, a core, and a terminal fitting attached to the flange portion. The core includes a winding core portion provided with the winding section and a flange portion formed at an end of the winding core portion in its axial direction. The terminal fitting includes a main body portion disposed on an outer end surface of the flange portion, a mounting portion continuing to the main body portion and bending from the outer end surface toward a mounting surface of the flange portion, and a wire connection portion continuing to the main body portion and bending from the outer end surface toward a side surface of the flange portion. The mounting portion includes a plurality of mounting pieces arranged with at least one gap. The main body portion is adhered on the outer end surface by adhesive.

公开(公告)号：US20240212919A1

公开(公告)日：2024-06-27

申请号：US18542964

申请日：2023-12-18

Applicant: TDK CORPORATION

Inventor： Taichi WATANABE ,  Tatsuya SATO ,  Yugo ASAI ,  Daisuke URABE ,  Keigo HIGASHIDA ,  Hanako YOSHINO ,  Takashi ARASAWA

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

CPC classification number: H01F27/2828 ,  H01F27/29 ,  H01F27/306

Abstract: A coil device includes a coil, a core, and a terminal fitting. The coil includes a winding portion and a lead portion led out from the winding portion. The core includes a winding core portion provided with the winding portion and a flange portion formed at an end in a first direction parallel to an axis of the winding core portion. The terminal fitting is provided with an engagement portion for engaging with the flange portion. The flange portion includes a first side surface located on one side in a second direction parallel to a mounting surface of the flange portion and a second side surface located on the other side in the second direction. The engagement portion is disposed from the first side surface to the second side surface and connected to the lead portion.

公开(公告)号：US20220384089A1

公开(公告)日：2022-12-01

申请号：US17731292

申请日：2022-04-28

Applicant: TDK Corporation

Inventor： Hanako YOSHINO ,  Keigo HIGASHIDA ,  Taichi WATANABE

IPC: H01F27/29 ,  H01F17/04

Abstract: Disclosed herein is a circuit substrate that includes a coil component mounted on the substrate having first and second land patterns and first and second dummy land patterns. The coil component includes a first signal terminal and a first dummy terminal which are provided on the first flange part, a second signal terminal and a second dummy terminal which are provided on the second flange part, and a wire wound around the winding core part and whose one end and other end are connected respectively to the first signal terminal and the second signal terminal. The coil component is mounted on the substrate such that the first and second signal terminals are connected respectively to the first and second land patterns and that the first and second dummy patterns are connected respectively to the first and second dummy land patterns.