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    • 35. 发明授权
    • Open-type magnetic circuitry of loudspeaker
    • 扬声器开式磁路
    • US06584209B1
    • 2003-06-24
    • US09828844
    • 2001-04-10
    • Alex Wang
    • Alex Wang
    • H04R2500
    • H04R9/022
    • An open-type magnetic circuitry of loudspeaker includes a lower yoke having a central portion upward projected to form a bobbin, a magnet positioned on top of the bobbin, a voice coil wound around the bobbin and the magnet, and a diaphragm connected at a root portion to the voice coil. The magnetic circuitry of loudspeaker is characterized in that the lower yoke is provided at an upper side surrounding the bobbin with a plurality of radially equally spaced supporting posts, a top end of which being higher than at least a bottom side of the magnet, and that a ring-shaped upper yoke having a central hole is covered onto the top end of the supporting posts, such that heat produced by the voice coil during working could quickly dissipate via the spaces among the supporting posts. Since no heat would accumulate in the loudspeaker, the loudspeaker could always maintain good sound quality.
    • 扬声器的开放式磁路包括下轭,其具有向上突出的中心部分以形成线轴,位于绕线筒顶部的磁体,缠绕在绕线管和磁体上的音圈以及连接在根部的隔膜 部分到音圈。 扬声器的磁路电路的特征在于,下磁轭设置在围绕绕线筒的上侧,多个径向等间隔的支撑柱,其顶端高于磁体的至少底侧,并且 具有中心孔的环形上轭被覆盖在支撑柱的顶端,使得在工作期间由音圈产生的热可以经由支撑柱之间的空间迅速消散。 由于扬声器中不会积聚热量,扬声器总是能保持良好的声音质量。