公开(公告)号：US09978504B2

公开(公告)日：2018-05-22

申请号：US15046195

申请日：2016-02-17

Applicant: TDK CORPORATION

Inventor： Yuuki Narisawa ,  Nobuo Takagi ,  Yuu Okabe

IPC: H01F17/04 ,  H01F27/28 ,  H01F27/29 ,  H01F27/32

CPC classification number: H01F27/2823 ,  H01F17/04 ,  H01F27/29 ,  H01F27/327

Abstract: A coil device includes a core (20) having a columnar shaft (22), a first winding part (42) and a second winding part (46) that are wound around the shaft, and a terminal part (52) connected with ends of the first winding part and ends of the second winding part. A partition portion (30) provided on an outer peripheral surface (22a) of the shaft of the core protrudes from the outer peripheral surface toward the outer diameter direction and divides a part of the first winding part and a part of the second winding part.