公开(公告)号：US10531170B2

公开(公告)日：2020-01-07

申请号：US16310500

申请日：2017-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshimichi Kajihara ,  Takuji Miyamoto ,  Yuuki Izumi ,  Satoshi Koura

IPC: H04R1/02 ,  H04R9/06 ,  H04R9/02 ,  H04R7/16

Abstract: A loudspeaker device includes a loudspeaker, a box, and a lid. The box is provided with an opening and accommodates the loudspeaker. The lid covers the opening of the box. The lid includes a grille with one or more hexagonal holes each having an opening area equal to the area of a circle with a diameter in a range from 6.0 mm to 9.0 mm, inclusive.

公开(公告)号：US12273672B2

公开(公告)日：2025-04-08

申请号：US17977288

申请日：2022-10-31

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroyuki Morimoto ,  Yuuki Izumi

IPC: H04R25/00 ,  H04R1/02

Abstract: A loudspeaker to be attached to an attachment member, the loudspeaker including: a temporary joint pin which is inserted into a temporary joint hole and temporarily holds the loudspeaker in a suspended state. The temporary joint pin includes a rod-like portion backwardly projects from a rear end surface of a frame; a tilted surface portion which is part of an inner circumferential surface of a circumferential surface of the rod-like portion to be brought into contact with the temporary joint hole, and is tilted to become closer to the central axis of the rod-like portion from a base end toward a distal end of the rod-like portion in a direction of projection; and a flanged portion which is adjacent to the tilted surface portion at the distal end of the rod-like portion, protrudes in a direction crossing the direction of projection, and catches onto the attachment member.

公开(公告)号：US10104475B2

公开(公告)日：2018-10-16

申请号：US15496315

申请日：2017-04-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuuki Izumi ,  Satoshi Koura ,  Tomonori Shibuya

IPC: H04R9/02 ,  H04R7/18 ,  H04R9/06

Abstract: A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.