Patent ID: 9505431
Filing Date: 2016-11-29
CPC Classification: B62D,G01D,G01L

Claim Text:
1. A rotation detecting device, comprising: first and second members that are rotatable relative to each other around a rotation axis; a magnetic member fixed to the first member, the magnetic member having N-poles and S-poles alternately arranged around the rotation axis; at least one detecting member arranged to face the magnetic member, the at least one detecting member being constructed of a magnetic material; first and second holding members fixed to the second member for holding the at least one detecting member, the holding members being constructed of thermoplastic resin and are welded and fixed to each other, wherein the at least one detecting member is disposed between the first and second holding members to prevent relative contact between the at least one detecting member and the second member; and a magnetic sensor that detects a relative rotation between the first and second members by sensing a change of magnetic field in the at least one detecting member, wherein the change of magnetic field is caused by a relative rotation between the magnetic member and the at least one detecting member due to the relative rotation between the first and second members.