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Position detecting device

  • US 10,101,177 B2
  • Filed: 11/17/2015
  • Issued: 10/16/2018
  • Est. Priority Date: 11/26/2014
  • Status: Active Grant
First Claim
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1. A position detecting device comprising:

  • a magnet that has a first magnetic pole and a second magnetic pole;

    a magnetic sensor that detects a change in magnetic flux generated by a detection target which enters between the magnet and the magnetic sensor on the first magnetic pole side of the magnet;

    a magnetic shield that shields a disturbing magnetic field and that includes a magnetic material which is disposed on the second magnetic pole side of the magnet; and

    a housing that contains the magnet, the magnetic sensor, and the magnetic shield,wherein the magnetic shield includes a first shielding wall which spreads in a direction intersecting a direction of a magnetization axis connecting the first magnetic pole and the second magnetic pole, and a second shielding wall which extends from the first shielding wall in the direction parallel to the magnetization axis so as to be arranged on a side of the magnet,wherein the magnetic shield is arranged in the housing so there is a first magnetic gap between the magnet and the first shielding wall and a second magnetic gap between the magnet and the second shielding wall, andwherein the magnet, the magnetic sensor, and the magnetic shield are integrally formed in the housing with resin.

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