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:
Dec. 02, 2025
Filed:
Aug. 09, 2022
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Abstract
A loudspeaker device includes: a loudspeaker unit; a cabinet that includes an opening and covers the rear side of the loudspeaker unit; a bass reflex port in a tubular shape that communicates the interior with the exterior of the cabinet, and includes one end disposed in the opening of the cabinet and the other end disposed inside the cabinet; and a diffuser in the shape of a mountain that includes a side surface in a substantially tapered shape, a top facing the one end of the bass reflex port, and a base edge located on the side of the side surface opposite to the top in the inclination direction of the side surface. The side surface of the diffuser includes a plurality of grooves spaced apart in the circumferential direction of the diffuser and each extending helically in a direction from the top to the base edge.