Patent ID: 6160329
Filing Date: 2000-12-12
Classification: H02K

Abstract:
A miniature electric motor comprising:a conductive casing having an open end and a closed end;a permanent magnet stator fitted to the casing;a wound rotor disposed in working relationship with the stator, the rotor having a shaft, a rotor core mounted on the shaft, a commutator mounted on the shaft adjacent one end of the rotor core and rotor windings wound about the rotor core and terminated on the commutator;a conductive end plate closing the open end of the casing and being in intimate electrical contact therewith;brush gear comprising an insulating material holder supporting first and second motor terminals and a pair of brushes electrically connected to the motor terminals and arranged to make sliding contact with the commutator, the holder being fixed to the end plate; andan earth strap electrically connecting one of the motor terminals to the casing,wherein the earth strap is a resilient conductive strip which makes contact with an inner surface of the end plate, passes through an opening in the end plate to be visible externally of the motor and contacts the first motor terminal.