Stepper motor with a housing 1,2,4,6,16, in which a cylindrical rotor 11,15 fixed on a central shaft 12 can rotate but not translate along an axial direction. There are cylindrical translators 9, 14 on both sides of the rotors 11, 15, where the translators 9, 14 are sealed fit in a cylindrical space within the housing 6 and around the central shaft 12 and where the translators 9, 14 can only translate in an axial direction, where in one axial position of a translator 9, 14 a set of triangular asymmetric teeth 20 located on the translator 9, 14 can interact and fit into a set of triangular asymmetric teeth 21 on the rotor 11, 15, where the shape of the teeth 21 on both sides of the rotor 11, 15 is symmetric and where one of the sets of teeth 20, 21 between one translator 9 (14) and the rotor 11 (15) and a set of teeth 20, 21 between the other translator 9 (14) and the rotor 11 (15) are tangentially shifted, i.e. offset over a length equal to half the width of a tooth 20, 21 and where the translators 9, 14 can be moved by a pressure difference between the part of the cylindrical space between the housing 6 and a translator 9, 14 and the part of the cylindrical space between the translator 9, 14 and the rotor 11, 15.

An air-outlet adjusting assembly for a motor vehicle includes a drive unit configured to be driven by an electric drive and configured to act on at least one pivotable valve flap and at least one pivotable guide slat. The drive unit includes a rotatably arranged sliding-block carrier having a sliding block arranged eccentrically thereon, wherein, in a first rotary motion segment of the sliding-block carrier, the sliding block is configured to engage in a valve-flap slotted link connected for conjoint rotation to the at least one valve flap and, in a second rotary motion segment of the sliding-block carrier, the sliding block is configured to engage in a guide-slat slotted link connected for conjoint rotation to the at least one guide slat.

An air-outlet adjusting assembly for a motor vehicle includes a drive unit configured to be driven by an electric drive and configured to act on at least one pivotable valve flap and at least one pivotable guide slat. The drive unit includes a rotatably arranged sliding-block carrier having a sliding block arranged eccentrically thereon, wherein, in a first rotary motion segment of the sliding-block carrier, the sliding block is configured to engage in a valve-flap slotted link connected for conjoint rotation to the at least one valve flap and, in a second rotary motion segment of the sliding-block carrier, the sliding block is configured to engage in a guide-slat slotted link connected for conjoint rotation to the at least one guide slat.

An air-outlet adjusting assembly for a motor vehicle includes a drive unit configured to be driven by an electric drive and configured to act on at least one pivotable valve flap and at least one pivotable guide slat. The drive unit includes a rotatably arranged sliding-block carrier having a sliding block arranged eccentrically thereon, wherein, in a first rotary motion segment of the sliding-block carrier, the sliding block is configured to engage in a valve-flap slotted link connected for conjoint rotation to the at least one valve flap and, in a second rotary motion segment of the sliding-block carrier, the sliding block is configured to engage in a guide-slat slotted link connected for conjoint rotation to the at least one guide slat.