| 摘要 |
<p>PURPOSE:To obtain a stable magnetic detecting output, by using a magneto- resistance effect element for a magnetic detecting part. CONSTITUTION:A cylindrical coil bobbin 11 and a printed substrate 12 are supported in a housing 10 consisting of a non-magnetic electric conductor. The outside surface of a bottom wall 15 of the housing 10 forms a sensor face 13, and a guide bank 14 provided on the bobbin 11 is positioned opposingly in the inside of the bottom wall 15. A cylindrical magnetic material pole 18 is stored in the coil bobbin 11 so that its end part is projected a little from a collar part 16b and is retained to the guide bank 14, is retained to the substrate 12, and also is supported so as to be pushed in the direction of the sensor face 13 by a screw 19 grounded electrically and thermally. An electromagnetic coil 20 for magnetizing the magnetic material pole 18 is wound round the bobbin 11. A magneto- resistance effect element 21 stuck onto the end face of the magnetic material pole 18 is placed on the part of the guide bank 13.</p> |
