Driving mechanism for a backdrop

摘要: The invention relates to a driving mechanism for backdrop, in which the board roll (10) is attached two brackets (3a, 3b) supported by pivots (8, 17). are suspended from rope system (2) passes along vertical guides (1a, 1b) and their inter-connecting cross-bar through rolls, has been adapted lift lower remaining horizontal position. By pulling at ropes, will rise, causing drive (7) of out frictional contact with guide (1a) be unwound (10). lowered releasing system, so that rotation opposite direction causes rewound. In accordance invention, before raised, end can pulled floor roll, without clamping on support 17), leaving free rotate when hand, although guide. To rewind extending after photographing session, brought turning bracket (3a) counter-clockwise about axle glide (14a) lever (4), surface between acting against force spring (15), wound handle (9), thus rewinding onto roll.