Geared motor comprising position sensor

A geared motor comprising an electric motor;

• a reduction gear having an input portion connected to a rotational shaft of said electric motor;
• an output shaft coupled to an output stage gear of said reduction gear in a state where said output shaft has an axis common to the axis of said output stage gear and a position sensor disposed in a state where said position sensor has an axis common to that of said output shaft and having an input shaft coupled to said output stage gear to convert a rotational angle position into an electric signal;
• said output stage gear including a gear body having an output shaft mount hole at an axis thereof and a protrusion provided on the gear body so as to protrude from one end face of said gear body in an axial direction around said output shaft mount hole;
• said output shaft being coupled to said gear body by fitting said output shaft into said output shaft mount hole from the other end face of said gear body in the axial direction thereof;
• a coupling member formed of resilient material being secured to said output stage gear with said protrusion embedded in said coupling member;
• said coupling member having a sensor input shaft insertion hole of non-circular cross section formed therein with a rotational central axis corresponding to a central axis of said output shaft;
• and said input shaft of said position sensor having a leading end of cross section corresponding to that of said sensor input shaft insertion hole and being coupled to said output stage gear by fitting said leading end into said sensor input shaft insertion hole.