发明授权
US4547874A Moving coil type cartridge mounted on cantilever within central opening
of ring magnet
失效
安装在悬臂的环形磁铁中央开口内的移动线圈式磁芯
- 专利标题： Moving coil type cartridge mounted on cantilever within central opening of ring magnet
- 专利标题（中）： 安装在悬臂的环形磁铁中央开口内的移动线圈式磁芯
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申请号： US413082申请日： 1982-08-30
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公开(公告)号： US4547874A公开(公告)日： 1985-10-15
- 发明人: Yoshihisa Mori , Mitsuru Takashima
- 申请人： Yoshihisa Mori , Mitsuru Takashima
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX56-142838 19810910
- 主分类号： H04R9/12
- IPC分类号： H04R9/12 ; H04R9/16
摘要：
Herein disclosed is a compact, highly reliable and inexpensive moving coil type cartridge comprising a ring-like magnet which is coaxially disposed with respect to a cantilever having a needle at its free end. A back-up first and a ring-like second auxiliary magnetic members are additionally provided at both sides of the ring magnet to attain the effective utilization of magnetic flux from the ring magnet.
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