| 摘要 |
<p>The presente invention relates to a device for raising and lowering packet and pleated blinds, provided with means for orderly winding up the blind driving cords, comprising a driving bar (1) rotated by driving means (2), therewith there is associated, in a rotatively rigid and axially sliding way, at least an outside threaded sleeve (5) engaging with a nut screw (7) formed in a supporting fixed bracket, in order to axially displace the sleeve (5) as the bar (1) is rotated. To the sleeve (5) the blind raising cord (12) ends can be affixed, the cords being wound on the sleeve (5) for raising and lowering the packet or pleated blind.</p> |
