The invention relates to a device having a plurality of parallel lamellae and an actuating device. The lamellae can be brought together to form a packet and connected to a pivoting element for pivoting purposes. The pivoting element has a first end and a plurality of other ends which are respectively connected to a lamella. When a lamella is pulled, the lamellae are pivoted in a common plane by the pivoting element. Preferably, the lamellae are respectively pivotably mounted on the upper, essentially horizontal edge thereof.