Operating devices and slats for reversible window blinds

A reversible blind comprising a plurality of slats to be guided by a lateral track, said slats comprising:

• a first edge and a second edge, the second edge being located opposite of the first edge;
• a projection disposed on the first edge of the slats, the projection having a hook defining a curvature and for linking with an adjoining slat;
• and
• a first flange and a second flange disposed on the second edge of the slats, the first flange and the second flange together defining a channel in which the hook of an adjoining slat is inserted, wherein the second flange defines an inwardly disposed portion extending across more than half of the width of the slat and having a curvature, such that the interrelationship between the hook of one slat and the second flange of the adjoining slat causes said slats to lean on both sides of the lateral track during movement.

A reversible blind having slats which follow a curved path, the slats having at one of their edges a projection which ends in a hook for linking with an adjoining slat and having at an opposite edge a channel defined between a first flange and a second flange, the channel being adapted to link with the hook of an adjoining slat, the hook having a curvature that adapts to a curvature of an inwardly disposed portion of the second flange of an adjoining slat so that adjoining slats form an angle which corresponds to a position that they occupy when the blind sits in a region with greatest curvature of said curved path, wherein the inwardly disposed portion of the second flange covers more than half of a width of the slat, which results in a connection between adjoining slats causing each slat to lean simultaneously on the two sides of a lateral track where they are assembled,

• the blind further comprising a hand operating device which drives a first transmission pinion and a first driving pinion connected to the first transmission pinion, said first transmission pinion transmitting the movement to a second transmission pinion and a second driving pinion, said driving pinion being coaxial to and integral with the second transmission pinion, by means of a first intermediate wheel connected to the first transmission pinion and meshing into a second intermediate wheel, in such a way that the movement of the blind is caused when cylindrical projections of the slats mesh into the first and second driving pinion, wherein the hand operating device comprises a separating pinion train including a plurality of pinions having coplanar and parallel axes and a bevel pinion integral with an extremity pinion of the pinion train, the hand operating device further comprising a bevel wheel to transmit motion to the first transmission pinion, the transmission pinion being integral with the bevel wheel.