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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 8588456 B1

PDFFull Text
Expired
Date of Patent:
Nov. 19, 2013

Filed:

May. 16, 2011

Acoustic conversion device

Applicants:

Tsutomu Nagumo, Saitama, JP;

Koji Matsuda, Saitama, JP;

Kenji Hiraiwa, Chiba, JP;

Takayuki Ishii, Chiba, JP;

Koji Nageno, Tokyo, JP;

Takeshi Hara, Kanagawa, JP;

Takahiro Suzuki, Saitama, JP;

Inventors:

Tsutomu Nagumo, Saitama, JP;

Koji Matsuda, Saitama, JP;

Kenji Hiraiwa, Chiba, JP;

Takayuki Ishii, Chiba, JP;

Koji Nageno, Tokyo, JP;

Takeshi Hara, Kanagawa, JP;

Takahiro Suzuki, Saitama, JP;

Assignee:

Sony Corporation, Tokyo, JP;

Attorney:

Dentons US LLP

Primary Examiner:

Duc Nguyen

Assistant Examiner:

Sean H Nguyen

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

An acoustic conversion device includes: a driving unit including a pair of magnets disposed so as to face each other, a yoke to which the pair of magnets are attached, a coil to which driving current is supplied, a vibrating portion which vibrates when driving current is supplied to the coil, and an armature disposed between the pair of magnets with the vibrating portion passed through the coil; and a diaphragm unit including a holding frame having an opening, a resin film adhered to the holding frame in a state covering the opening of the holding frame, a diaphragm held on the inner side of the holding frame in a state adhered to the resin film, and a beam portion of which the tip portion formed integrally with the diaphragm is combined with the vibrating portion of the armature, for propagating the vibration of the vibrating portion to the diaphragm.

Find Patent Forward Citations

Nagumo, Tsutomu. (2013). Acoustic conversion device (U.S. Patent No. 8588456). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8588456

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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