Abstract: The drive system for rotating prism-type display boards of the present invention comprises a mechanical system (5) consisting of: a vertical spindle guided axially in a vertical direction XX? in a housing (6) and comprising above the top wall of the crossmember of a frame a dog clutch (9) engaging directly with the corresponding moving part; and a drum (10) with attached pins (12, 13, 14), the drum being housed in the housing (6) and engaging both with the vertical spindle and with a cam (70) of the drive module (7).
Abstract: An attachment device includes at least one slat (51, 52) which in profile is in the shape of an arc of a circle, the internal face (54) of which is secured to snap-fastening elements (55), whereas each slat (51, 52) has, at its snap-fastening element (55), an elastic-deformation height d allowing a pressure force to be exerted on the far edges (53) of each slat (51, 52) so that the continuous flaps (7) of a corresponding poster strip (5) are held between the far edges (53) and the face (40, 41, 42) of a rotary prism (4).