STEPPING MOTOR INCLUDING SPRING PLATE WITH AT LEAST ONE BENDING PORTION

摘要

PURPOSE: A stepping motor is provided to reduce operating noises of the motor by suppressing axial vibrations of a lead screw and vibrations of a spring plate during rotation of the lead screw. CONSTITUTION: A stepping motor comprises a stator arranged in a case; a rotor arranged in the stator such that the rotor is rotatable; a lead screw which is press fit to the rotor such that an end of the lead screw is protruded from one side of the rotor; and a spring plate(240) arranged in the case such that the spring plate supports the lead screw in an axial direction. The spring plate has a main body(241); a press piece(242) protruded from one side of the main body such that the press piece presses the end of the lead screw; and an elastic support member protruded from the other side of the main body such that the elastic support member is elastically supported at an inner surface of the case. The elastic support member is at least one bending portion(243) formed by cutting a certain part of the spring plate and bending the cut part toward the other side of the main body.