Patent ID: 6452297
Filing Date: 2002-09-17
Classification: H02K

Abstract:
A motor device comprising:a yoke formed generally in a bottomed cylindrical shape; a rotor in which an armature and a commutator are fixed to a rotary shaft and which is generally accommodated in the yoke; brushes force-contacted to the commutator; and a gear housing accommodating a reduction member which produces output after reducing a rotation speed of the rotor, and fixed in an opening of the yoke, wherein: the commutator and the brushes are disposed within the gear housing which is located outside the opening of the yoke in an axial direction of the rotary shaft; a brush accommodating recess is formed in the gear housing at an axial end on a side of the yoke, the recess being larger at least partly than an inner periphery of the yoke in a radial direction; the brushes are disposed within the brush accommodating recess to extend in a space which is larger than the inner periphery; the brush accommodating recess is formed generally in a square shape when viewed in the axial direction of the rotary shaft; the brushes are disposed generally along a diagonal line in the brush accommodating recess; the yoke is formed with a flange around the opening of the yoke so that the flange covers an opening of the brush accommodating recess, the flange being generally in the square shape when viewed in the axial direction of the rotary shaft; and the brushes are disposed at two opposing corners of the brush accommodating recess, respectively.