Patent ID: 8860406
Filing Date: 2014-10-14
Classification: G01B,G01D

Abstract:
1. A magnetic encoder, comprising: an object to be detected made of a magnetic material and capable of rotating about a rotational axis; a casing made of a non-magnetic material and spaced apart from the object in a direction perpendicular to the rotational axis; a magnet accommodated in the casing for generating a magnetic field; and a magnetic sensor for detecting changes in a magnetic field corresponding to rotational movement of the object, the magnetic sensor being accommodated in the casing and situated between the magnet and the object, wherein an opposite wall of the casing opposite to the object has a thickened portion and a thin portion integrally formed with the thickened portion, the thin portion having a smaller thickness than the thickened portion, the magnetic sensor being situated at the thin portion, the thin portion defines a recess on an inner surface of the opposite wall, resin being provided in the recess, and a plurality of thin portions are situated in a plurality of positions on the opposite wall, wherein a portion of the opposite wall extending between the thin portions adjacent to each other has a larger thickness than that of the thin portions.