FIELD: screening or protective devices for openings, with or without operating or securing mechanisms, closures of similar construction.
SUBSTANCE: operation mechanism comprises drive to provide rotational movement of winding shaft, shielding screen and at least one spring for screen weight balancing. Spring is arranged about drive. Spring and drive pass in subassembly, which may at least partly slide inside shaft by single operation performing. The first end of the spring is kinematically connected to shaft when said subassembly is secured in place in the shaft.
EFFECT: simplified device assemblage and installation.
11 cl, 6 dwg
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