Vanes actuation system, in particular for air vent

The lamella actuation system has a first lamella (12) pivotable about a first axis (a) in a frame (10), a second lamella (16) pivotable about a second axis (b) in the frame and an operating element (28) attached to the first lamella and joined to the second lamella via a sliding/gymbal joint. The operating element can slide on the first lamella parallel to the first axis.