发明名称 |
Speaker and its manufacturing method. |
摘要 |
<p>A plastic-molded frame 3 has a bottom-closed cylindrical magnetic circuit holding portion 2 which has a positioning projection 6 provided in a central portion on a bottom surface 2a of the magnetic circuit holding portion 2. A magnetic circuit is incorporated in the magnetic circuit holder 2 by putting a bottom plate 9 on the bottom 2a such that a positioning recess 12 in the lower surface of the bottom plate 9 engages the positioning projection 6, next putting a ring-shaped magnet 13 on the bottom plate by using a magnet guide 11 on the bottom plate 9, next putting a top plate 14 on the magnet 13, and next urging the top plate 14 down and rotating it in a predetermined direction such that engaging portions 16 provided along the outer circumferential edge of the top plate 14 engage with engaging projections 8 extending from the upper open end of the magnetic circuit holder 2 and such that slanted surfaces 7 of the engaging projections 8 tightly contract the entirety of the members 14, 13, 9 in the magnetic circuit holder 2. <IMAGE></p> |
申请公布号 |
EP0619688(A1) |
申请公布日期 |
1994.10.12 |
申请号 |
EP19940302419 |
申请日期 |
1994.04.06 |
申请人 |
MINEBEA CO.,LTD. |
发明人 |
IIJIMA, TOSHIHITO, C/O MINEBEA ONKYO CO., LTD.;HUKAWATASE, TOSHIFUMI, C/O MINEBEA ONKYO CO., LTD. |
分类号 |
H04R9/02;H04R9/06;H04R31/00;(IPC1-7):H04R9/06 |
主分类号 |
H04R9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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