Patent ID: 7498704
Filing Date: 2009-03-03
Classification: F16C,H02K

Abstract:
1. A motor comprising: a rotor including a shaft rotatable around a rotation axis; a stator that faces the rotor; a sleeve arranged along the rotation axis and receiving the shaft, a face of the sleeve and a face of the shaft that are opposed to each other forming together a bearing supporting the rotor in a rotatable manner relative to the stator; a sleeve-retaining portion arranged along the rotation axis to retain the sleeve and having a cylindrical portion, and bottom portion closing an end of the cylindrical portion, the bottom portion defining a recess in an interior surface thereof that faces and is opposed in an axial direction to an axial end of the sleeve; an attracting magnet opposed to an axial end of the shaft and magnetically attracting the axial end of the shaft; and a magnet holder comprising a cup-shaped member having a closed bottom and an open top, the cup-shaped member of the magnet holder being accommodating the attracting magnet; and wherein: the axial end of the sleeve is opposed in the axial direction to a respective portion of the magnet holder, and the cup-shaped member of the magnet holder is disposed in the recess in the interior surface in the bottom portion of the sleeve-retaining portion such that the bottom portion of the sleeve-retaining portion is opposed in the axial direction to the bottom of the cup-shaped member of the magnet holder, whereby the sleeve and the bottom portion of the sleeve-retaining portion together restrict axial movement of the magnet holder.