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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10804709 B1

PDFFull Text
Date of Patent:
Oct. 13, 2020

Filed:

Jul. 25, 2018

Coil unit, and power transmitting device, power receiving device and wireless power transmission system using the coil unit

Applicant:

Tdk Corporation, Tokyo, JP;

Inventors:

Kota Arasaki, Tokyo, JP;

Mitsunari Suzuki, Tokyo, JP;

Assignee:

TDK CORPORATION, Tokyo, JP;

Attorney:

Young Law Firm, P.C.

Primary Examiner:

Michael R Fin

Int. Cl.
CPC ...
H02J 5/00 (2016.01); H01F 27/38 (2006.01); H01F 38/14 (2006.01); H02J 50/10 (2016.01); H02J 7/02 (2016.01); H04B 5/00 (2006.01); H02J 50/80 (2016.01); H02J 50/70 (2016.01); H02J 50/12 (2016.01); H01F 27/36 (2006.01); H01F 27/28 (2006.01); H01F 3/10 (2006.01);
U.S. Cl.
CPC ...
H02J 5/005 (2013.01); H01F 27/2871 (2013.01); H01F 27/365 (2013.01); H01F 27/38 (2013.01); H01F 38/14 (2013.01); H02J 7/025 (2013.01); H02J 50/10 (2016.02); H02J 50/12 (2016.02); H02J 50/70 (2016.02); H02J 50/80 (2016.02); H04B 5/00 (2013.01); H01F 3/10 (2013.01);
Abstract

Disclosed herein is a coil unit that includes a coil, a magnetic member having a first surface facing to the coil and a second surface opposite to the first surface, a first metal shield covering the second surface of the magnetic member, and a second metal shield disposed so as to surround the coil. The first metal shield is disposed spaced apart in the axial direction of the coil from the second surface in a region between an end portion of the magnetic member and the second metal shield. A length Lp of a protruding part of the second shield that protrudes forward from a reference plane that is coplanar with the first surface in the axial direction of the coil is smaller than a first distance Ly from the end portion of the magnetic member to the second metal shield.

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