Case, electric motor and method for producing the electric motor

摘要

An electric motor comprises a yoke in which permanent magnets are held, the yoke including a cylindrical yoke body having a bottom and an auxiliary yoke in which the yoke body is fitted, at least one engaging opening provided in one of said yoke body and auxiliary yoke and a deformable band provided in the other of said yoke body and auxiliary yoke. The deformable band is fitted in the engaging opening in a state that the yoke body and auxiliary yoke are fitted.