| 摘要 |
<p>1. Drive device for blinds or the like, having a drive shaft (5) which, through a planetary gear arrangement drives an output shaft (16) which has to be coupled to the blind and further comprising a first switching plate (48) driven by the planetary gear arrangement and equiaxial with the output shaft and co-operating with a limit switch (42), the switching member (44) of which is braced on an end face of the first switching plate (48), characterised in that equiaxially with the first switching plate (48) there is a further switching plate (52), of which the end face (50) lies substantially in the plane of the end face (46) of the first switching plate (48), and in that the first and the further switching plates have a radially extending depression (54, 56) and in that the further switching plate is driven at a rotary speed other than that of the first switching plate, and in that the switching member (44) is also braced on the end face (50) of the further switching plate (52) so that it can drop in to the depressions (54, 56) when these are aligned with one another.</p> |
