| 摘要 |
Runner means for curtains and the like consisting of a jacket (1), on which the curtain is wound, a plate wheel (5), a fixed shaft (2), a chain wheel (3), plates (6) and a spring (7). The plate wheel (5) is mounted on the shaft (2) so as to enable it both to rotate and to be axially displaced relative to the shaft. Every second plate (6) is attached to the fixed shaft (2) and the others to the plate wheel (5). Furthermore, the plates are attached to the shaft (2) and the plate wheel, respectively, in such a way that they cannot rotate relative to the part to which they are attached, but can be axially displaced. The curtain is fixed by the spring (7) pressing the plate wheel (5) leftwards, the plates (6) by means of the frictional action locking the plate wheel (5) at the fixed shaft (2). When the height of the curtain is to be changed the chain wheel (3) is rotated in relation to the plate wheel (5), the plate wheel (5) being moved rightwards, due to the fact that the contact area between the chain wheel (3) and the plate wheel (5) is saw-toothed. When the plate wheel (5) is moved rightwards, against the action of the spring (7), the plates (6) will be moved apart, whereby the height of the curtain can easily be changed. |
