DIRECT-ACTING ROTATION DETECTOR, DIRECT-ACTING ROTATION DETECTOR UNIT AND DIRECT-ACTING ROTATION DRIVING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a direct-acting rotation detector capable of suppressing reduction in detection accuracy of a rotational position of a mobile even in the case where a rotary scale that is coaxial with the mobile is tilted by tilting the mobile.SOLUTION: A direct-acting rotation detector 17 configured to detect displacement of an output shaft 2 comprises: a direct-acting position detection part 20 including a direct-acting scale 76 including a magnetization pattern 79 for direct-acting position detection on a peripheral wall surface 76a that is turned in a radial direction, and a first magnetic detection element 91 which faces the magnetization pattern 79 for direct-acting position detection in the radial direction and detects a change of a magnetic field; and a rotational position detection part 19 including a rotary scale 55 including a magnetization pattern 57 for rotational position detection on a plane 55a that is turned in an axial direction X, and a magnetic resistance element 86 which faces the magnetization pattern 57 for rotational position detection in the axial direction X and detects a change of a magnetic field. The direct-acting scale 76 is moved in the axial direction X together with the output shaft 2, and the rotary scale 55 is coaxially rotated together with the output shaft 2 at a predetermined position in the axial direction X.SELECTED DRAWING: Figure 6