Fixing structure for a commutator, insulator for a motor core, and motor structure

A rotor for a motor comprising:

• an armature shaft;
• a commutator that has a core portion formed from an insulating material and that is positioned on said armature shaft;
• a motor core positioned on said armature shaft and around which a winding is wound;
• and
• an insulator insulating said motor core, wherein
• a plurality of concave insertion portions are formed at predetermined intervals along a peripheral direction on an inner peripheral surface of the core portion of said commutator in which said armature shaft is position, and
• a plurality of convex connecting portions are provided at a commutator side of said insulator, said connecting portions being formed at predetermined intervals along a peripheral direction and inserted into said insertion portions positioned between said armature shaft and an inner peripheral surface of the core portion of said commutator so as to connect said commutator and said insulator.