Abstract: One embodiment of a mechanism for controlling the rotation of a roller blind winding roller having a spring drive and immovably fixed to a roller blind holder and its winding roller is constructed of an inner shaft (1), on which a sleeve (2) is rotationally seated. In the sleeve (2) there is rotationally seated an inner roller (4), and between the sleeve (2) and the inner roller (4) there is an annular slot (5) filled with a braking layer (26) formed from high viscosity medium. The inner roller (4) contains a formed driver (6) and in the sleeve (2), between the inner roller (4) and the inner shaft (1) there is a brake shoe (3) seated with its pin (9) in the opening (7) of the inner shaft (1), and a relief (8) where the driver (6) of the inner roller (4) is seated.

Abstract: One embodiment of a mechanism for controlling the rotation of a roller blind winding roller having a spring drive and immovably fixed to a roller blind holder and its winding roller is constructed of an inner shaft (1), on which a sleeve (2) is rotationally seated. In the sleeve (2) there is rotationally seated an inner roller (4), and between the sleeve (2) and the inner roller (4) there is an annular slot (5) filled with a breaking layer formed from high viscosity medium. The inner roller (4) contains a formed driver (6) and in the sleeve (2), between the inner roller (4) and the inner shaft (1) there is a break shoe (3) seated with its pin (9) in the opening (7) of the inner shaft (1), and a relief (8) where the driver (6) of the inner roller (4) is seated.

Abstract: A mechanism for blocking the rotation of a roller blind having a winding roller with a spring drive used to block the sunshade in its set position of unwinding, immovably fixed to the holder fir the roller blind holder its winding roller, characterized in that it is built from a sleeve (1) with cams (2a), (2b), (2c), (2d) formed on its inner side and in the sleeve (1) there is located a roller (3) with a guide (4) as an oblong groove, formed above the cams (2a), (2b), (2c), (2d) on its cylindrical side and in the guide there is a ball (5) which during revolution of the roller (3) against the sleeve (1), depending on the direction of that rotation, is moved between the cams (2a), (2b), (2c), (2d) or blocked in a pocket (2e) formed in the cam (2b) in positions from I to IV, blocking or releasing relative revolution of the roller (3) and the sleeve (1). In another embodiment cams (2a), (2b), (2c), (2d) are formed on the roller (3) and the guide (4) is formed on the sleeve (1).

Abstract: One embodiment of a mechanism for controlling the rotation of a roller blind winding roller having a spring drive and immovably fixed to a roller blind holder and its winding roller is constructed of an outer roller (1), on which a sleeve (2) is seated. In the sleeve (2) there is rotationally seated an inner roller (4), and between the sleeve (2) and the inner roller (4) there is an annular slot filled with a breaking layer (5) formed from high viscosity medium. The inner roller (4) contains a formed driver (6) and in the sleeve (2), between the inner roller (4) and the outer roller (1) there is a break shoe (3) seated with its pin (9) in the opening (7) of the outer roller (1), and a relief (8) where the driver (6) of the inner roller (4) is seated.