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1. (WO2018119895) MAGNETIC CIRCUIT SYSTEM AND MANUFACTURING METHOD THEREFOR, MICRO SPEAKER

Pub. No.:    WO/2018/119895    International Application No.:    PCT/CN2016/113073
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 30 00:59:59 CET 2016
IPC: H04R 9/06
H04R 9/02
Applicants: SOUND SOLUTIONS INTERNATIONAL CO., LTD.
奥音科技(北京)有限公司
Inventors: LIU, Zhenpu
刘振普
JI, Wenhui
季文晖
Title: MAGNETIC CIRCUIT SYSTEM AND MANUFACTURING METHOD THEREFOR, MICRO SPEAKER
Abstract:
A magnetic circuit system, comprising: an annular magnetic gap (7), two or more low magnetic field nodes (8), magnetic gap area(s) (9) and a magnetic fluid (10), the annular magnetic gap (7) being surrounded and formed by a magnetic yoke (1), a magnet (2) and a top sheet (3); the low magnetic field nodes (8) being provided within the annular magnetic gap (7); the magnetic gap area (9) being the portion between any two low magnetic field nodes (8) within the annular magnetic gap (7); the magnetic fluid (10) being filled within at least one magnetic gap area (9). Further provided are a method for manufacturing the magnetic circuit system and a micro speaker, the micro speaker comprising the magnetic circuit system.