| 摘要 |
The invention relates to a device for controlling a venetian blind, the device comprising a top module for transforming rotary movement of a horizontal drive roller into rotary movements in a determined direction a horizontal driven roller. According to the invention, the top module contains first and second epicyclic gear trains connected in series, each gear train presenting a set of parallel-shafted planet gears meshing in a respective ring and containing a rotary planet carrier, the direction of rotation of the planet gears of one of the trains being reversed relative to that of the planet gears of the other one of the trains by mutual meshing, the planet gears of the second rotary planet carrier being rotated by the horizontal drive roller, while the second rotary planet carrier is constrained to rotate with the horizontal driven roller.
|
