Patent ID: 7459826

Claim:
A laminated body of a motor comprising: a yoke having a belt shape with a length longer than a width of the yoke, the yoke being spirally laminated to form a hollow cylindrical shape; and a plurality of teeth protruding from one side edge of the yoke, the plurality of teeth being disposed along a longitudinal direction of the yoke and being spaced apart at a predetermined distance, each of the teeth including a tooth base extending from the one side edge of the yoke at a first end of the tooth base to a second end of the tooth base; a stopping protrusion extendingly formed at the second end of the tooth base; a plurality of pin holes formed at the yoke, each of the plurality of pin holes corresponding to one of the plurality of teeth; an inclined portion of the stopping protrusion having an inclined surface formed by decreasing a width of the stopping protrusion toward an end of the stopping protrusion so as to reduce cogging torque; and grooves located at both sides of the tooth base at a junction of the tooth base at the first end and the yoke in the longitudinal direction of the yoke, each of the grooves having a shape corresponding to an end shape of the stopping protrusion, a width between the two grooves at both sides of the corresponding tooth base being smaller than a width of the corresponding tooth base at the second end thereof.