Magnetic circuit system, production method thereof and miniature loudspeaker

The invention provides a magnetic circuit system, a production method thereof and a miniature loudspeaker. The magnetic circuit system comprises an annular magnetic gap, more than two low magnetic field nodes, magnetic gap areas and magnetic fluid. The annular magnetic gap is encircled by a magnet yoke, magnetic and a washer. The low magnetic field nodes are set in the annular magnetic gap. Each magnetic gap area is a part between any two low magnetic field nodes in the annular magnetic gap. The magnetic fluid is filled in at least one magnetic gap area. The miniature loudspeaker comprises themagnetic circuit system. 本发明提供种磁路系统及其制造方法、微型扬声器，所述磁路系统包括环形磁间隙、两个以上低磁场节点、磁隙区以及磁流体；所述环形磁间隙由磁轭、磁铁、顶片围成；所述低磁场节点设于所述环形磁间隙内；所述磁隙区为所述环形磁间隙内任意两个低磁场节点之间的部分；所述磁流体被填充于至少个磁隙区内。所述微型扬声器包括所述磁路系统。