Patent ID: 6504276
Filing Date: 2003-01-07
Classification: H02K

Abstract:
A motor actuator comprising:a motor including a motor portion and a gear portion that are connected with each other, said gear portion having a motor output shaft for outputting a rotational force from said motor portion; and a rotational position detector for detecting a rotational position of said motor output shaft, said rotational position detector including an approximately cylindrical sensor drive shaft being coupled with said motor output shaft of said gear portion, wherein: said motor output shaft has an approximate cylindrical shape with an inner peripheral surface defining an insertion hole into which a shaft portion of said sensor drive shaft is inserted; said motor output shaft has a plurality radial recesses on the inner peripheral surface, wherein each of the plurality of radial recesses extends in an axial direction of said motor output shaft; and said sensor drive shaft has a radial projection that protrudes from an outer peripheral surface of said shaft portion for engaging with said radial recess of said motor output shaft, wherein said radial projection is further for engaging with only one of said plurality of radial recesses; and said motor output shaft and said sensor drive shaft are connected with each other to prevent a rotation therebetween by an engagement of said one of said plurality of radial recesses of said motor output shaft with said radial projection of said sensor drive shaft.