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:
Feb. 27, 2024
Filed:
Feb. 19, 2020
Applicant:
Foster Electric Company, Limited, Tokyo, JP;
Inventor:
Takayuki Tabata, Tokyo, JP;
Assignee:
Foster Electric Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04R 9/06 (2006.01); H04R 1/28 (2006.01); H04R 9/02 (2006.01); H04R 9/04 (2006.01);
U.S. Cl.
CPC ...
H04R 9/06 (2013.01); H04R 1/2811 (2013.01); H04R 9/025 (2013.01); H04R 9/043 (2013.01); H04R 2499/13 (2013.01);
Abstract
A speaker device includes a speaker unit including a magnetic circuit and a diaphragm, connected to the magnetic circuit and being capable of generating sound waves by electrically driving the magnetic circuit to vibrate the diaphragm; and a Helmholtz resonator connected to the speaker unit. The diaphragm includes a first surface oriented to a sealed space, and a second surface that is back surface of the first surface and is oriented to the Helmholtz resonator.