| 摘要 |
PURPOSE: A roll screen apparatus is provided to maintain the tension of a wire unit for a long time using multiple cylinders and to miniaturize the volume and size of the apparatus. CONSTITUTION: A roll screen apparatus comprises a screen, a winding unit, guiderails, wire units, multiple cylinders(30), and tension maintenance units(40). The winding unit ascends or descends the screen using the driving force of a drive motor. The guiderails guide the ascending and descending of the screen. The tension maintenance units comprise a fixed unit(41) and a moving unit(42). A mounting space for the cylinders is formed between the fixed unit and the moving unit. Three or more bearings(60) are arranged on the outer surfaces of the fixed and moving units at uniform intervals and are connected to the wire units. The cylinders control the tension of the wire units by moving the moving unit from the fixed unit. |
