公开(公告)号：US09813820B2

公开(公告)日：2017-11-07

申请号：US15023419

申请日：2015-02-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takafumi Yuasa ,  Kenji Yamauchi ,  Satoshi Takayama ,  Koichi Nakayama ,  Ryo Kuribayashi

IPC: H04R1/02 ,  H04R9/06 ,  F21V33/00 ,  H04R7/22 ,  H04R7/12 ,  F21V8/00

CPC classification number: H04R9/06 ,  F21V33/0056 ,  G02B6/002 ,  G02B6/0055 ,  H04R1/028 ,  H04R7/125 ,  H04R7/22 ,  H04R2499/13

Abstract: A loudspeaker includes a light-emitting element, a frame, a magnetic circuit provided with a magnetic gap, a diaphragm, a voice coil bobbin, and a voice coil. The diaphragm has an inner circumferential end including an end face facing the light-emitting element, and a light guide having a reflecting surface formed thereon and provided at a position where light enters from the end face. The first end of the voice coil bobbin is joined to the inner circumferential end of the diaphragm, and the second end is inserted into the magnetic gap. The voice coil is wound around the second end of the voice coil bobbin. Light from the light-emitting element enters the end face of the diaphragm, is diffused by the light guide, and is reflected on the reflecting surface.

公开(公告)号：US09628916B2

公开(公告)日：2017-04-18

申请号：US15023681

申请日：2015-03-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takafumi Yuasa ,  Kenji Yamauchi ,  Satoshi Takayama ,  Koichi Nakayama ,  Ryo Kuribayashi

IPC: H04R1/02 ,  H04R7/12 ,  B60R11/02 ,  F21V8/00 ,  H04R9/02 ,  H04R9/04 ,  F21V33/00

CPC classification number: H04R7/125 ,  B60R11/0217 ,  F21V33/0056 ,  G02B6/0055 ,  H04R1/025 ,  H04R1/028 ,  H04R7/12 ,  H04R9/025 ,  H04R9/04 ,  H04R9/045 ,  H04R2307/021 ,  H04R2307/025 ,  H04R2307/029 ,  H04R2499/11

Abstract: A loudspeaker includes a light-emitting element, a frame, a magnetic circuit provided with a magnetic gap, a diaphragm, a voice coil bobbin, and a voice coil. The diaphragm includes an inner peripheral end portion having an end face to which a light-emitting element is coupled, a light-guide portion, a reflective surface, and an outer peripheral end portion coupled to the frame. The first end of the voice coil bobbin is coupled to the inner peripheral end portion of the diaphragm, and the second end thereof is inserted into the magnetic gap. A voice coil is wound on the second end of the voice coil bobbin.

公开(公告)号：US09596545B2

公开(公告)日：2017-03-14

申请号：US15023681

申请日：2015-03-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takafumi Yuasa ,  Kenji Yamauchi ,  Satoshi Takayama ,  Koichi Nakayama ,  Ryo Kuribayashi

IPC: H04R1/02 ,  H04R7/12 ,  B60R11/02 ,  F21V8/00 ,  H04R9/02 ,  H04R9/04 ,  F21V33/00

Abstract: A loudspeaker includes a light-emitting element, a frame, a magnetic circuit provided with a magnetic gap, a diaphragm, a voice coil bobbin, and a voice coil. The diaphragm includes an inner peripheral end portion having an end face to which a light-emitting element is coupled, a light-guide portion, a reflective surface, and an outer peripheral end portion coupled to the frame. The first end of the voice coil bobbin is coupled to the inner peripheral end portion of the diaphragm, and the second end thereof is inserted into the magnetic gap. A voice coil is wound on the second end of the voice coil bobbin.