US 9,813,820 B2
Loudspeaker, electronic apparatus using same, and mobile apparatus
Takafumi Yuasa, Osaka (JP); Kenji Yamauchi, Mie (JP); Satoshi Takayama, Mie (JP); Koichi Nakayama, Okayama (JP); and Ryo Kuribayashi, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 15/23,419
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 23, 2015, PCT No. PCT/JP2015/000837
§ 371(c)(1), (2) Date Mar. 21, 2016,
PCT Pub. No. WO2015/129232, PCT Pub. Date Sep. 3, 2015.
Claims priority of application No. 2014-033750 (JP), filed on Feb. 25, 2014.
Prior Publication US 2016/0286318 A1, Sep. 29, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. H04R 1/02 (2006.01); H04R 9/06 (2006.01); F21V 33/00 (2006.01); H04R 7/22 (2006.01); H04R 7/12 (2006.01); F21V 8/00 (2006.01)
CPC H04R 9/06 (2013.01) [F21V 33/0056 (2013.01); H04R 1/028 (2013.01); H04R 7/125 (2013.01); H04R 7/22 (2013.01); G02B 6/002 (2013.01); G02B 6/0055 (2013.01); H04R 2499/13 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A loudspeaker comprising:
a light-emitting element;
a frame;
a magnetic circuit joined to the frame and provided with a magnetic gap;
a diaphragm including an inner circumferential end including an end face facing the light-emitting element, and a light guide having a reflecting surface and provided at a position where light enters from the end face;
a cylindrical voice coil bobbin having a first end joined to the inner circumferential end, a second end inserted into the magnetic gap; and
a voice coil wound around the second end of the voice coil bobbin.