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:
Oct. 29, 2019
Filed:
Jan. 15, 2019
Applicant:
Alpine Electronics, Inc., Tokyo, JP;
Inventor:
Ryo Ito, Fukushima, JP;
Assignee:
ALPINE ELECTRONICS, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/28 (2006.01); H04R 9/06 (2006.01); H04R 7/16 (2006.01); H04R 1/02 (2006.01); B60R 11/02 (2006.01);
U.S. Cl.
CPC ...
H04R 1/2849 (2013.01); B60R 11/0217 (2013.01); H04R 1/026 (2013.01); H04R 7/16 (2013.01); H04R 9/06 (2013.01); H04R 2499/13 (2013.01);
Abstract
An opening portion is formed along an outer peripheral edge of a diaphragm in a second casing portion partitioned by the diaphragm. In the opening portion, a plurality of fins is arranged at regular intervals, and an air passage is formed between every adjacent two of the fins. The fin and the air passage are formed so as to be at an angle to a corresponding imaginary line that extends from the vibration center line of the diaphragm in the radial direction. By forming each of the air passages obliquely, noise generated by an air flow due to sound pressure is reduced.