Title:
LOUDSPEAKER
Document Type and Number:
WIPO Patent Application WO/2021/000136
Kind Code:
A1
Abstract:
The present application provides a loudspeaker. The loudspeaker comprises a magnet yoke, primary magnet steel stacked on the surface of one side of the magnet yoke, secondary magnet steel spaced apart from the primary magnet steel and forming a magnetic gap, and a primary pole core arranged on the primary magnet steel. The magnet yoke comprises a first magnet yoke, second magnet yokes, and third magnet yokes, the second magnet yokes surround the first magnet yoke and correspond to the magnetic gap in the vertical direction, and the third magnet yokes are arranged on the periphery of the second magnet yokes. According to a magnetic circuit system in the loudspeaker provided in the present application, by providing accommodating grooves of magnet yokes and a pole core, the volume of magnet steel is effectively increased, and the magnetic conduction efficiency and sensitivity are improved, and compared with glued and clamped magnetic circuit structures, an integrally formed sintering process structure can achieve better magnetic circuit concentricity control and more centralized performance distribution.
Inventors:
XIAO BO (CN)
LING HU RONGLIN (CN)
LIU XIAODONG (CN)
LING HU RONGLIN (CN)
LIU XIAODONG (CN)
Application Number:
PCT/CN2019/094036
Publication Date:
January 07, 2021
Filing Date:
June 30, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
AAC TECHNOLOGIES PTE LTD (CN)
International Classes:
H04R9/06; H04R9/02
Foreign References:
| CN206894884U | 2018-01-16 | |||
| CN1541498A | 2004-10-27 | |||
| CN205847587U | 2016-12-28 | |||
| CN201657285U | 2010-11-24 | |||
| CN108668208A | 2018-10-16 | |||
| CN206226702U | 2017-06-06 | |||
| CN206237603U | 2017-06-09 | |||
| US20150365744A1 | 2015-12-17 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYUANLIHE PATENT AND TRADEMARK FIRM (GENERAL PARTNERSHIP) (CN)
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