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:
Sep. 29, 2020
Filed:
Aug. 31, 2015
Foster Electric Company, Limited, Tokyo, JP;
Akinori Matsunaga, Tokyo, JP;
FOSTER ELECTRIC COMPANY, LIMITED, Tokyo, JP;
Abstract
Cylindrical ventilation ports radiating sound radiated from a rear surface of a diaphragm to an outside are projected from a rear surface of the electroacoustic converter having the diaphragm inside. A distal end of each ventilation port is located in a through hole of a circuit board, on which the electroacoustic converter is mounted, at a position farther away from the diaphragm than a contact surface of the circuit board. The distal end of each ventilation port may be in the through hole or may be protruded to the outside from the rear surface of the circuit board. As a result, since separation from the radiated sound from the front surface of the diaphragm is achieved, the radiated sound from the rear surface of the diaphragm is prevented from interfering with the radiated sound from the front surface of the diaphragm.