| 摘要 |
A rotation sensor includes a Hall element 3 for sensing a magnetic substance that is approaching, a permanent magnet that is provided adjacent the Hall element for applying a magnetic field to the Hall element, and a main body portion made of a resin and mounting the Hall element, the permanent magnet and the electronic parts electrically connected to the Hall element, wherein the resin is swollen in a taper manner in a boundary region between the permanent magnet and the main body portion, and the resin is swollen at a corner portion of the permanent magnet.
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