公开(公告)号：US20210306755A1

公开(公告)日：2021-09-30

申请号：US17211114

申请日：2021-03-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tetsuya KOYANAGI ,  Tetsushi ITANO ,  Kazuaki NISHIMURA ,  Makoto KUROZAWA ,  Ryouichi UEMOTO ,  Hiroki SANO

IPC: H04R7/12

Abstract: A speaker diaphragm includes an edge formed from an elastomer, and a diaphragm body that is to be joined to the edge. A joint between the edge and the diaphragm body includes a melting portion between the edge and the diaphragm body.

公开(公告)号：US20240244379A1

公开(公告)日：2024-07-18

申请号：US18404304

申请日：2024-01-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsukazu KUZE ,  Tetsushi ITANO ,  Ryouichi UEMOTO ,  Hiroyuki MORIMOTO

IPC: H04R9/06 ,  H04R9/02

CPC classification number: H04R9/063 ,  H04R9/025

Abstract: A diaphragm including at least a first portion, a second portion, and a third portion that are arranged around a predetermined reference axis extending in a vibration direction, and each have a different cross-sectional shape along a plane that includes the reference axis, in which the cross-sectional shape of the first portion is an arc having a first radius of curvature, the cross-sectional shape of the second portion is an arc having a second radius of curvature different from the first radius of curvature, and the cross-sectional shape of the third portion is a part of an ellipse.

公开(公告)号：US20220038801A1

公开(公告)日：2022-02-03

申请号：US17501359

申请日：2021-10-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryouichi UEMOTO ,  Goro TSUCHIYA ,  Hidetoshi ASADA ,  Takayuki DAN

IPC: H04R1/02 ,  H04R9/02

Abstract: A loudspeaker unit includes a frame that supports a diaphragm and a magnetic circuit. The frame includes: a first support supporting a perimeter of the diaphragm; a pedestal extending outwardly from a perimeter of the first support; fastening portions provided in positions on the pedestal that surround the perimeter of the first support; and reinforcements disposed in regions of the pedestal between the fastening portions, and fixed to the first support and the pedestal. The reinforcements include: a first plate portion that is a plate-shaped portion disposed in front of the pedestal to face the pedestal, and has a bent shape that protrudes in the forward direction; and a second plate portion that is a plate-shaped portion disposed in front of the pedestal to face the pedestal and the first plate portion, and has a bent shape that protrudes in a rearward direction.