Rotation detecting apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 31, 2004
Grant Date -
Dec 4, 2003
app pub date -
May 27, 2003
filing date -
May 28, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotation detecting apparatus including a drive gear rotatably supported by a case having a cover and capable of rotating cooperatively with an object to be detected, driven gears and brought in mesh with the drive gear and capable of rotating cooperatively therewith, magnets and provided at rotational center portions of the driven gears and having plane portions formed with N poles and S poles, a circuit board arranged at the case and capable of connecting to outside, magnetic reluctance elements attached to the circuit board and being opposed to the plane portions of the magnets and an electronic circuit part for converting an output signal of the magnetic reluctance element into a rotational angle signal, wherein the driven gears and are interposed by the case and the cover and a constant distance is maintained between the plane portion and the magnetic reluctance element.
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