| 摘要 |
<p>For a roller blind, particularly for use as a blackout shade, and with a spring-biassed roller bar and a blind (23) rolled on the roller bar and having along its lateral edges guide members (5, 6) guided in tracks in guide rails disposed at both sides of the window opening, and a bottom bar, a brake device is provided for retaining the bottom bar (7) in an arbitrary position against the effect of said bias-force by means of a cord arrangement with a cord (9, 10) which at the bottom of one guide rail (5, 6) is passed through said guide rail, the bottom bar (7) and the other guide rail (6, 5) to a fixture means (17, 17') at the top thereof. As friction means (14, 15, 14', 15') acting on the cord two pins (14, 15, 14', 15') are mounted in the bottom bar (7) over which the cord (9, 10) is passed in S-shape. To ensure parallel guidance of the bottom bar (7) in relation to the roller bar the cord arrangement may include two cords (9, 10) mounted in mirror-inversion.</p> |
