Rotary body driving apparatus

摘要

The rotary body driving apparatus for rotating a rotary body comprises: a rotor shaft, to which the rotary body and a rotor are attached, being rotatably held by a bearing section; a rotor magnet being attached to the rotor and partially exposed as a position detecting magnet; a first positioning section being formed in the rotor, the first positioning section corresponding to the position detecting magnet; and a second positioning section corresponding to a reference surface of the rotary body. The rotary body is attached to the rotor in a state where the first positioning section and the second positioning section are aligned so as to make circumferential positions of the reference surface and the position detecting magnet correspond to each other.

主权项

1. A rotary body driving apparatus for rotating a rotary body having a plurality of reflective surfaces whose inclination angles are different from each other,
comprising: a rotor; a rotor shaft, to one end part of which the rotary body is attached together with the rotor, being rotatably held by a bearing section of a stator housing; a rotor magnet being attached to the rotor, the rotor magnet being exposed to an outer circumferential side, by partially cutting an outer circumferential wall of the rotor, as a position detecting magnet; a first positioning section being formed in the rotor, the first positioning section corresponding to the position detecting magnet; and a second positioning section corresponding to a reference reflective surface of the rotary body, wherein the rotary body and the rotor are recession/projection-fitted to each other so as to prohibit rotation in a state where the first positioning section and the second positioning section are aligned so as to make circumferential positions of the reference reflective surface and the position detecting magnet correspond to each other.