| 摘要 |
In a rail (15) arranged above a blind is positioned a screw-formed element (3) extending within the rail along its extension. Feed means (6, 7) co-operate with the screw-formed element for winding cords (4, 5) on and off said element upon relative movement between said element and said feed means. Motor drive means (2) is arranged in the rail (15) for rotation of said screw-formed element (3) for said winding. Said drive means (2) preferably consists of a motor and gearbox unit including a slip coupling (19) and also including means (11, 12) for turning the blind slats. |
