Screw-based nanometric motion control mechanism

Linear motion control mechanism of an output shaft comprising:

• a rotor presenting a first threaded part, a circular drive surface rotatable around an axis and a second threaded part, the second threaded part being separated from the first threaded part, along the axis, by a central part comprising the circular drive surface;
• a frame defining a first threaded part collaborating with the first threaded part of the rotor, the first threaded part of the rotor being fitted so as to form an helical connection with the first threaded part of the frame so that rotation of the rotor with respect to the frame causes translation of the rotor with respect to the frame along the axis;
• an output shaft connected to the rotor,
• a stator configured to generate rotational micro-movements of the rotor, the stator having an oscillator with a contact area designed to be placed in contact with the circular drive surface to move the circular drive surface and rotor,
• a blocking device configured to prevent rotation of the output shaft around the axis with respect to the frame,
• wherein the output shaft has a second part designed to fix a load to be moved and a first threaded part collaborating with the second threaded part of the rotor, the first threaded part of the output shaft being fitted so as to form an helical connection with the second threaded part of the rotor so that rotation of the rotor with respect to the frame causes translation of the output shaft with respect to the rotor and frame along the axis.