Patent ID: 8487501

Claim:
An armature of an electric motor, comprising: a stator core including a stator yoke wherein a plurality thereof forms a substantially annular shape, and a tooth that protrudes inwardly from an inner wall of the stator yoke toward a center axis of the stator yoke, the tooth including a front portion opposite the stator yoke, the front portion having a tooth protrusion including an outer wall facing the inner wall of the stator yoke, and the tooth including a side wall extending from the stator yoke to the front portion; an insulator formed corresponding to the stator yoke and the tooth of the stator core, the insulator extending from the stator yoke toward the center axis of the stator yoke via a stem portion, and including at an end of the stem portion opposite the stator yoke two insulator protrusions protruding beyond respective sides of the stem portion, each insulator protrusion having an insertion groove; and an insulation film including at least a first portion that covers the inner wall of the stator yoke, a second portion that covers the side wall of the tooth, a third portion that covers the outward facing wall of the tooth protrusion, being and a fourth portion folded from the third portion to be fittingly fixed inside the insertion groove of one of the insulator protrusions.