LOUDSPEAKER

WIPO Patent Application WO/2021/128004

A1

Disclosed is a loudspeaker. The loudspeaker comprises a vibrating diaphragm, a voice coil, and central magnetic steel, wherein the voice coil is fixed below the vibrating diaphragm and is used for driving the vibrating diaphragm; the central magnetic steel is also located below the vibrating diaphragm and is located in the voice coil; a magnetic field is formed around the central magnetic steel; the voice coil is suspended in the magnetic field, so that when the voice coil is energized, the vibrating diaphragm is pushed by vertical force generated by means of the voice coil cutting magnetic field lines in the magnetic field; and an armature used for replacing a dome is arranged below the vibrating diaphragm, the armature is located above the central magnetic steel, the armature can generate S/N poles due to energization of the voice coil, and the polarities change along with the change of a current, so that the armature and the central magnetic steel can generate an alternately changing attraction force and repulsive force, thereby increasing a BL value of the loudspeaker, and thus improving the overall performance of the loudspeaker and meeting design requirements.

JP3192587	Multi-voice coil coaxial same sound source speaker
JP2005223414	SPEAKER APPARATUS
JP6619706	earphone

WU SHUWEN (CN)
ZHANG WANG (CN)

PCT/CN2019/127990

July 01, 2021

December 24, 2019

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AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (SG)

H04R11/02; H04R9/06

CN209390320U	2019-09-13
CN205545894U	2016-08-31
CN209693049U	2019-11-26
CN209105426U	2019-07-12
CN101257734A	2008-09-03
CN106878886A	2017-06-20
US20180367916A1	2018-12-20

GUANGZHOU YUEXIU JILY PATENT & TRADEMARK LAW OFFICE (CN)

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