| 摘要 |
PURPOSE: A dual roll blind is provided to protect to move a roll screen in horizontal direction by preventing deflection of a winding bar and to improve durability of a moving structure to horizontally move the roll screen by always keeping the roll screen in horizontal direction. CONSTITUTION: A dual roll blind includes a first screen, a second screen, a first winding bar(31), a second winding bar(32), a first gear(23), a second gear(24), a driving wheel(50), and a sliding mechanism. The first screen and the second screen respectively have a shading unit and a floodlighting unit. The first winding bar and the second winding bar respectively wind the first screen and the second screen. The first gear and the second gear are respectively coupled to a first rotary shaft(13) and a second rotary shaft(14) and respectively rotates the first winding bar and the second winding bar. The driving wheel is rotated by a driving rope(51) and coupled to the first gear. The driving wheel delivers the torque of the driving rope to the first gear and the first winding bar. The sliding mechanism delivers the torque of the driving wheel to slide the first winding bar in longitudinal direction of the first rotary shaft. |
