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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 9462392 B1

PDFFull Text
Date of Patent:
Oct. 04, 2016

Filed:

Jun. 30, 2014

Speaker device with a magnetic gap filled with magnetic fluid and changing magnetic flux density in axial and circumferential directions

Applicant:

Sony Corporation, Tokyo, JP;

Inventors:

Takahisa Tagami, Kanagawa, JP;

Emiko Ikeda, Tokyo, JP;

Keisuke Nakashita, Tokyo, JP;

Assignee:

SONY CORPORATION, Tokyo, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Rasha Al Aubaidi

Assistant Examiner:

Katherine Faley

Int. Cl.
CPC ...
H04R 1/00 (2006.01); H04R 9/06 (2006.01); H04R 11/02 (2006.01); H04R 15/00 (2006.01); H04R 9/02 (2006.01); H04R 1/06 (2006.01);
U.S. Cl.
CPC ...
H04R 15/00 (2013.01); H04R 1/06 (2013.01); H04R 9/027 (2013.01);
Abstract

A speaker device including a magnet formed in a ring shape; a yoke having a center pole portion inserted in the center of the magnet; a plate formed in a ring shape and arranged on an outer circumferential surface of the center pole portion of the yoke while being attached to the magnet; a coil bobbin formed in a cylindrical shape and movable in the axial direction of the center pole portion while being partially fitted on the center pole portion of the yoke; a voice coil wrapped around the outer circumferential surface of the coil bobbin, at least part of the voice coil being arranged in a magnetic gap formed between the plate and the center pole portion of the yoke; a diaphragm having its inner circumferential portion connected to the coil bobbin; and a magnetic fluid filled in the magnetic gap.

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Tagami, Takahisa. (2016). Speaker device with a magnetic gap filled with magnetic fluid and changing magnetic flux density in axial and circumferential directions (U.S. Patent No. 9462392). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9462392

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