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1. 发明授权

US5751828A Magnetic circuit unit for loud-speaker and method of manufacturing the same 失效
标题翻译：用于扬声器的磁路单元及其制造方法
公开(公告)号：US5751828A
公开(公告)日：1998-05-12
申请号：US451653
申请日：1995-05-26
申请人： Hiroshi Ueda , Kazuhiro Ohyama , Shizuo Furuyama , Kiyoshi Kojima , Masayuki Wakamiya
发明人： Hiroshi Ueda , Kazuhiro Ohyama , Shizuo Furuyama , Kiyoshi Kojima , Masayuki Wakamiya
IPC分类号： H01F1/08 , H04R9/02 , H04R31/00 , H04R25/00
CPC分类号： H04R9/025 , H04R9/06 , H04R31/006 , Y10T29/49005
摘要： A magnetic circuit unit for a loud-speaker is provided, in which an adhesion step can be reduced or omitted, magnetic properties can be improved through enhancement of magnetic efficiency, and a durable anti-corrosive treatment can be performed at low price, so that higher performance and lower cost of the loud-speaker can be attained. A method of manufacturing the same is also provided. A top plate has a conical, columnar, truncated conical, or partially spherical hollow part formed on one side whose inner surface is integrated with an anisotropic Nd--Fe--B system magnet under a forming pressure of 100 to 200 kgf/cm.sup.2 through Joule heating by passing a current under compression. The forming die is cooled to a temperature below 100.degree. C. while maintaining the pressure, and the compact is then taken out from the forming die. This integrated compact is adhered to an outer yoke, and a looped yoke and a loop anisotropic Nd--Fe--B system magnet are also adhered thereon to fabricate a magnetic circuit unit. Subsequently, this magnet circuit unit is dipped in acrylic resin emulsion, and a coating of 7 to 15 .mu.m thick is formed by using a rotary coating device.
摘要翻译：提供一种用于扬声器的磁路单元，其中可以降低或省略粘附步骤，通过提高磁效率可以提高磁性能，并且可以以低价格执行耐久的抗腐蚀处理，使得扬声器的性能更高，成本更低。还提供了一种制造该方法的方法。顶板具有在一侧形成的圆锥形，柱状，截头圆锥形或部分球形的中空部分，其内表面通过焦耳加热在100至200kgf / cm2的成形压力下与各向异性Nd-Fe-B系磁体一体化通过压缩下的电流。在保持压力的同时将成形模冷却至低于100℃的温度，然后从成型模具中取出压块。该集成的紧凑件粘附到外轭铁上，并且环状磁轭和环形各向异性Nd-Fe-B系磁体也粘附在其上以制造磁路单元。随后，将该磁体电路单元浸渍在丙烯酸树脂乳液中，并使用旋涂装置形成厚度为7至15μm的涂层。

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