Electric motor with a retractable shaft

A vibrator assembly in a device comprising:

• an electric motor comprising:
• a stator comprising one or more stator conductors for carrying a current when power is applied;
• a rotor comprising one or more permanent magnets for producing a magnetic field such that when the power is applied, the one or more stator conductors interact with the magnetic field to purposely generate a force having an axial component and a circumferential component;
• a shaft attached to the rotor, wherein the shaft travels along a rotor axis in an axial direction under an action of the axial component of the force, further wherein the shaft rotates under the action of the circumferential component of the force when the power is applied, further wherein the shaft retracts under the action of a biasing force from a tension device when the axial component of the force is no longer present when the power is removed;
• and
• an unbalanced mass coupled to the shaft wherein the unbalanced mass rotates under the action of the circumferential component of the force on the rotor when power is applied.

A method for controlling lateral positioning of a shaft within an electric motor during operation of the same, the method comprising:

• biasing a rotor within the electric motor in an axial direction towards a parked position due to a biasing force produced by a tension device where a magnetic field produced by one or more permanent magnets becomes misaligned with one or more stator conductors when power is applied to the electric motor;
• applying power to the electric motor thereby producing a current in the stator conductors, which interacts with the magnetic field of the one or more permanent magnets to generate a force having an axial component and a circumferential component;
• and
• extending a rotor shaft in an axial direction against the biasing force of the tension device due to the axial component of the purposely generated force.