US 12,490,019 B2
Loudspeaker device
Masashi Nishida, Osaka (JP); Kazuki Honda, Mie (JP); and Ippei Kiyama, Hyogo (JP)
Assigned to Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Appl. No. 18/689,318
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Aug. 9, 2022, PCT No. PCT/JP2022/030487
§ 371(c)(1), (2) Date Mar. 5, 2024,
PCT Pub. No. WO2023/105854, PCT Pub. Date Jun. 15, 2023.
Claims priority of application No. 2021-200842 (JP), filed on Dec. 10, 2021.
Prior Publication US 2024/0397253 A1, Nov. 28, 2024
Int. Cl. H04R 1/02 (2006.01); H04R 1/28 (2006.01)
CPC H04R 1/2826 (2013.01) [H04R 1/02 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A loudspeaker device comprising:
a loudspeaker unit that converts an electric signal into vibration to emit sound;
a cabinet that includes an opening and covers a rear side of the loudspeaker unit;
a bass reflex port in a tubular shape that communicates an interior of the cabinet with an exterior of the cabinet, and includes one end disposed in the opening of the cabinet and an other end disposed inside the cabinet; and
a diffuser in a 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 a side of the side surface that is opposite to the top in an inclination direction of the side surface,
wherein the side surface of the diffuser includes a plurality of grooves that are spaced apart in a circumferential direction of the diffuser and each extend helically in a direction from the top to the base edge.