公开(公告)号：US10708693B2

公开(公告)日：2020-07-07

申请号：US16302286

申请日：2017-06-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomonori Shibuya ,  Yoshiyuki Takahashi ,  Nobuo Nakamura ,  Takayuki Dan ,  Tetsushi Itano

IPC: H04R7/12 ,  H04R7/18 ,  H04R9/02 ,  H04R9/06 ,  H04R31/00 ,  H04R7/10 ,  H04R9/04 ,  H04R1/02

Abstract: A vibration component for loudspeakers includes a base layer, an intermediate layer, and a coating layer. The base layer has a front face and a rear face, has a first density, and is formed of a paper body containing a plurality of fibers. The intermediate layer has a first face joined to the front face of the base layer, and a second face on a reverse side of the intermediate layer from the first face, has a second density higher than the first density, and includes a plurality of cellulose fibers as a main component. The coating layer is provided on the second face of the intermediate layer, and includes an inorganic powder formed of a plurality of inorganic fine particles.

公开(公告)号：US11849269B2

公开(公告)日：2023-12-19

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

CPC classification number: H04R1/025 ,  H04R1/021 ,  H04R9/025 ,  H04R2201/02

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.

公开(公告)号：US09781515B2

公开(公告)日：2017-10-03

申请号：US15023684

申请日：2015-08-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomonori Shibuya ,  Yoshiyuki Takahashi ,  Yoshimichi Kajihara ,  Tetsushi Itano ,  Mitsukazu Kuze ,  Takayuki Dan

IPC: H04R1/00 ,  H04R7/06 ,  H04R9/06 ,  H04R7/12 ,  H04R9/04

CPC classification number: H04R7/06 ,  H04R7/125 ,  H04R9/045 ,  H04R9/06 ,  H04R2307/021 ,  H04R2307/029 ,  H04R2499/11 ,  Y10S977/796

Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is composed of bamboo cellulose nanofibers and is formed at least on the first side of the base layer. The coating layer has a thickness in the range of 3% to 15%, both inclusive of the sum of the thicknesses of the base layer and the coating layer.