	US 7,551,053 B2
	Coil device
Mitsuhiro Yamashita, Tokyo (Japan); Takashi Nagasaka, Tokyo (Japan); Hideki Miura, Tokyo (Japan); Yasuhiro Matsukawa, Tokyo (Japan); Kazuo Sato, Tokyo (Japan); Akira Sato, Tokyo (Japan); Hironori Sato, Tokyo (Japan); Takayuki Ito, Tokyo (Japan); and Yasuhiko Kitajima, Tokyo (Japan)
Assigned to TDK Corporation, Tokyo (Japan)
Appl. No. 10/575,470 PCT Filed Nov. 05, 2004, PCT No. PCT/JP2004/016426 § 371(c)(1), (2), (4) Date Apr. 12, 2006, PCT Pub. No. WO2005/045859, PCT Pub. Date May 19, 2005.
Claims priority of application No. 2003-375434 (JP), filed on Nov. 05, 2003; application No. 2004-244278 (JP), filed on Aug. 24, 2004; application No. 2004-244279 (JP), filed on Aug. 24, 2004; application No. 2004-244280 (JP), filed on Aug. 24, 2004; and application No. 2004-245723 (JP), filed on Aug. 25, 2004.
Prior Publication US 2007/0063803 A1, Mar. 22, 2007
Int. Cl. H01F 27/29 (2006.01)

U.S. Cl. 336—192 [343/870]

23 Claims

1. A coil apparatus comprising:

a core;

a winding; and

a terminal,

wherein the core has terminal attachment portions at opposed both ends thereof, and has a winding portion in an intermediate portion thereof,

the winding is wound around the winding portion,

the terminal is a part to which an end of the winding is connected, formed of one metal sheet, and includes an attachment portion, an intermediate portion and a bottom portion,

one end of the attachment portion is fixed to the terminal attachment portion of the core,

one end of the intermediate portion is continuous with the other end of the attachment portion at a bent portion,

the bottom portion has one end which is continuous with the other end of the intermediate portion at a bent portion, faces the attachment portion, and has the other end as a free end, and

the intermediate portion has a hole in a plane thereof, both inner edges of the hole opposed to each other in at least one direction having an arc shape.