Patent ID: 6677694
Filing Date: 2004-01-13
Classification: H01R,H02K

Abstract:
A DC motor comprising:a rotary shaft; an armature rotatable with the rotary shaft; a stator magnet disposed opposite to the armature; a commutator affixed adjacent the armature; a brush holder; and a pair of brushes retained by the brush holder in a manner that the brushes contact a peripheral surface of the commutator; wherein each of the pair of brushes has an identical shape; wherein the pair of brushes is positioned in a fan-like manner so that the pair of brushes open at an angle between 93Â° and 115Â° when the pair of brushes is mounted on the brush holder but before the commutator is disposed inside the pair of brushes; wherein the brush holder is generally circular and has a thick section and a pair of slit-like brush affixing sections formed in the thick section for retaining the pair of brushes at positions equidistant from a center of the brush holder, wherein each of the slit-like brush affixing sections has a slit width generally equal to a thickness of each of the brushes plus a thickness of a terminal to be affixed to each of the brushes; wherein the pair of brush affixing sections is formed in directions extending toward the center of the brush holder, and the brush affixing sections are disposed in a fan-like manner such that the brush affixing sections open with respect to one another at an angle between 93Â° and 115Â°; wherein the brush holder has a thinner section defining through-holes positioned on extension lines of the brush affixing sections such that the brushes can be reached from outside through the through-holes.