发明名称 SURFACE MOUNTING CHOKE COIL
摘要 PROBLEM TO BE SOLVED: To suppress damage of a brim part and deterioration of an inductance value when magnetic powder content resin is thermally expanded. SOLUTION: A surface mounting choke coil has a drum core 14 consisting of a winding core 11, an upper brim part 12 arranged at an upper end of the core 11 and a lower brim 13 disposed at a lower end, and a coil conductor 15 wound to a periphery of the winding core. Taper parts 12a and 13a are formed on faces confronted with the other brims of the upper brim and the lower brim on the drum core. An enlargement region A where an interval between the confronted brims is enlarged as it is detached in a radial direction from an outer peripheral face of the wound coil conductor is arranged. Magnetic powder content resin 16 is inserted into the enlargement region. Even if expansion by heat occurs in magnetic powder content resin, magnetic powder content resin can expand in the radial direction detached from the outer peripheral face of the coil conductor along an inner face of the brim. Force which is to extend a part between the upper brim and the lower brim is reduced. Damage of the brim and the occurrence of inner stress in the winding core are suppressed. COPYRIGHT: (C)2008,JPO&INPIT
申请公布号 JP2008205245(A) 申请公布日期 2008.09.04
申请号 JP20070040394 申请日期 2007.02.21
申请人 TAIYO YUDEN CO LTD 发明人 AOKI MAKOTO;YAMAGUCHI TAKASHI;TANAKA YOSHIMITSU
分类号 H01F37/00;H01F17/04;H01F27/255;H01F27/32 主分类号 H01F37/00
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