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.:
Date of Patent:
Jan. 21, 2014
Filed:
May. 18, 2011
Tsutomu Nagumo, Saitama, JP;
Koji Matsuda, Saitama, JP;
Koji Nageno, Tokyo, JP;
Takeshi Hara, Kanagawa, JP;
Takahiro Suzuki, Saitama, JP;
Takayuki Ishii, Chiba, JP;
Kenji Hiraiwa, Saitama, JP;
Tsutomu Nagumo, Saitama, JP;
Koji Matsuda, Saitama, JP;
Koji Nageno, Tokyo, JP;
Takeshi Hara, Kanagawa, JP;
Takahiro Suzuki, Saitama, JP;
Takayuki Ishii, Chiba, JP;
Kenji Hiraiwa, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
An acoustic conversion device includes: a driving unit including a pair of magnets, a yoke, a coil, 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 being passed through the coil; and a diaphragm unit including a holding frame having an opening, a resin film adhered to the holding frame, a diaphragm held within the holding frame, and a beam portion for propagating the vibration of the vibrating portion to the diaphragm; with the beam portion being combined with one edge side of the diaphragm, a predetermined gap being formed between the other edge of the diaphragm, and the inner face of the holding frame, a reinforcing member being provided to the predetermined gap, and the diaphragm being combined with the holding frame by the resin film and the reinforcing member.