Adjustment device for a motor vehicle

A vehicle seat comprising:

• a rotary element;
• and
• an adjustment device comprising:
• a housing in which the rotary element is mounted rotatably about an axis of rotation;
• a locking device comprising a first locking element and a second locking element, wherein the first locking element is connected to the rotary element for rotation therewith and the second locking element is arranged on the housing, wherein the second locking element is reversibly movable between a primary position in a blocking situation, in which the first locking element and the second locking element interact with each other in an unlocking region by means of a form-fitting and/or force-fitting connection, and a secondary position in an adjustment situation, in which the form-fitting and/or force-fitting connection between the first locking element and the second locking element is cancelled, wherein the adjustment device has an adapter plate, wherein the adapter plate is mounted rotatably relative to the rotary element and to the housing, wherein an unlocking elementon the second locking element interacts with the adapter plate in an actuator region during the transfer of the second locking element from the primary position into the secondary position, wherein the second locking element is displaced in the secondary position in relation to the primary position
• by an unlocking height in the unlocking region, and
• by a lifting height in the actuator region,
• wherein the actuator region is arranged such that the lifting height is smaller than the unlocking height.