Panasonic Intellectual Property Management Co., Ltd.

Ippei Kiyama

Kazuki Honda

Satoshi Takayama

Takafumi Yuasa

Suemei Fukuhara

Masashi Nishida

Akihisa Kawamura

Shuji Saiki

Toshiyuki Matsumura

Isao Kuramitsu

Junichi Ikeda

Churo Sato

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.

Loudspeaker device

A speaker includes: a diaphragm having a dome shape; a tubular member having the diaphragm disposed inside, and having an inner diameter increasing toward a front; and a phase plug. The phase plug includes: a front surface, a rear surface facing a central portion on a front surface of the diaphragm at a constant interval in parallel, and a side surface connecting the front surface and the rear surface. A front surface of the phase plug is larger than a rear surface of the phase plug as viewed in a front-rear direction of a speaker. At least a part of a side surface of the phase plug has an inclined surface extending outward while extending forward, faces an inner circumferential surface of the tubular member and a front surface of the diaphragm, and directs a sound wave generated from the diaphragm toward an inner circumferential surface of the tubular member.

Speaker

Provided is a loudspeaker device that can improve sound quality. The loudspeaker device includes: a loudspeaker housing; a first loudspeaker unit provided in a first wall of the loudspeaker housing; and an acoustic tube communicating an inside and an outside of the loudspeaker housing to each other. The acoustic tube has a predetermined length, and is accommodated in the loudspeaker housing and is helically shaped.

Speaker device

A speaker device includes: a loudspeaker including a diaphragm and a field portion disposed rearwardly of the diaphragm; and a cabinet accommodating the field portion. The loudspeaker also includes a mounting member with which the loudspeaker is mounted to the cabinet, and a mounting plane of the mounting member includes a center of gravity of the loudspeaker.

Growing community of inventors

Hyogo, Japan

Ippei Kiyama