COIL DEVICE - TDK CORP

Title:

COIL DEVICE

Document Type and Number:

WIPO Patent Application WO/2005/045858

Kind Code:

A1

Abstract:

A coil device in a part-winding form and a method for manufacturing a coil device are disclosed. The size of the core is small, and the windings do not collapse even though the form is simple. The coil device (501) comprises a ferrite core (503) and a coil (505) provided around the core. The coil (505) has at least a first coil portion (551) and a second coil portion (553). The boundary end surface (CF₁), on the second coil side, of the first coil is so inclined that the inner circumferential side is nearer the second coil portion than the outer circumferential side. The boundary end surface (CF₂), on the first coil side, of the second coil portion is so inclined that the outer circumferential side is nearer the first coil portion than the inner circumferential side.

Inventors:

YAMASHITA MITSUHIRO
NAGASAKA TAKASHI
MIURA HIDEKI
MATSUKAWA YASUHIRO
SATO KAZUO
SATO AKIRA
SATO HIRONORI
ITO TAKAYUKI
KITAJIMA YASUHIKO

Application Number:

PCT/JP2004/016425

Publication Date:

May 19, 2005

Filing Date:

November 05, 2004

Export Citation:

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Assignee:

TDK CORP (JP)
YAMASHITA MITSUHIRO
NAGASAKA TAKASHI
MIURA HIDEKI
MATSUKAWA YASUHIRO
SATO KAZUO
SATO AKIRA
SATO HIRONORI
ITO TAKAYUKI
KITAJIMA YASUHIKO

International Classes:

H01F17/04; H01F27/29; H01F27/02; H01F41/06; (IPC1-7): H01F27/02

Foreign References:

JP2003318030A	2003-11-07
JPH02156513A	1990-06-15
JPS58124213A	1983-07-23
JPH0444109U	1992-04-15
JP2002329618A	2002-11-15
JP2002093629A	2002-03-29
JPS6073229U	1985-05-23
JP2001313224A	2001-11-09

Other References: