MAGNETIC ROTATION DETECTOR AND MANUFACTURING METHOD THEREFOR

摘要

Provided is a magnetic rotation detector wherein a magnet body and a magnetosensitive element can be aligned with each other with high precision without the need for a time-consuming process, and also provided is a manufacturing method therefor.  More specifically, a magnetic rotation detector (10), comprising a magnet body (20) that is provided on the side of a rotating body (22) and has pole pairs consisting of an S pole and an N pole formed therein, and a magnetosensitive element (42) opposite to the magnet body (20) in the direction of the central axis (L) of rotation of the rotating body (22), is further provided with a partition member (31) interposed between the magnet body (20) and the magnetosensitive element (42), and a ring (15) fixed to the surface of the partition member (31) on the side where the magnet body (20) is located, wherein the center of the magnetosensitive element (42) is located on the central axis (L) of the ring (15), the magnet body (20) is arranged on the inside of the ring (15) in non-contact with the ring (15), and the center of the magnet body (20) is located on the central axis (L) of rotation of the ring (15).