Tdk Corporation

Dai Nippon Printing Co., Ltd.

Yasuhiro Matsukawa

Takayuki Ito

Kazuo Sato

Akira Sato

Ken Kimura

Hironori Sato

Hideki Miura

Masanori Ueno

Toshinaru Kayahara

Mitsuhiro Yamashita

Yasuhiko Kitajima

Takashi Nagasaka

Yoshio Okabe

Kouji Doi

Hiroshi Masuda

Toshinari Kayahara

A coil apparatus having a divided winding conformation and a manufacturing method of the coil apparatus which can prevent a winding from collapsing while achieving a reduction in size of a core and simplification of a structure. A coil apparatus includes a ferrite core and a coil provided around the core. The coil includes at least a first coil portion and a second coil portion, and a boundary end surface of the first coil portion on the second coil portion side is inclined in such a manner that its inner peripheral side is closer to the second coil portion than its outer peripheral side. Further, a boundary end surface of the second coil portion on the first coil portion side is inclined in such a manner that its outer peripheral side is closer to the first coil portion than its inner peripheral side.

Coil device

A coil apparatus that can increase mechanical strength of terminal portions and assure sufficient impact resistant properties and vibration resistant properties even in an application in a severe use environment such as an in-vehicle coil apparatus. Terminals are formed of one metal sheet, and include an attachment portion, an intermediate portion, and a bottom portion. One end of the attachment portion is fixed at each terminal attachment portion of a core. One end of the intermediate portion is continuous with the other end of the attachment portion at a first bent portion. The bottom portion has a first end continuous with the other end of the intermediate portion at a second bent portion, facing the attachment portion, and a second free end. The intermediate portion has a hole in a plane thereof. In each hole, both inner edges that are opposed to each other in at least one direction have an arc shape.

Growing community of inventors

Tokyo, Japan

Yasuhiro Matsukawa