Window covering i.e. light window covering, raising or lowering device, has mechanical transmission comprising worm wheel transmission with worm-like element and driving worm wheel to be brought into engagement with transmission

摘要

The device has an elongate housing (2') with a motorized drive (8) for rotatingly driving a shaft (3) and a mechanical transmission between the motorized drive and the rotatable shaft. The transmission comprises a worm wheel transmission, which comprises a drivable or screwable worm-like element (7A') and a driving worm wheel (7B') to be brought into engagement with the transmission. The drivable worm-like element is arranged on the rotatable shaft, and the driving element is connected to the motorized drive.