公开(公告)号：EP0813646B1

公开(公告)日：1998-11-25

申请号：EP96903941.1

申请日：1996-03-06

申请人： VELUX Industri A/S

发明人： MADSEN, Lars, Holck

IPC分类号： E06B9/322

CPC分类号： E06B9/322 ,  E06B9/262 ,  E06B2009/2625

摘要： The operating device comprises an input shaft (20) which by one end is connected with a driving means with a rotatable wheel (17) for receiving an endless cord (8), and which by the other end is coupled to an output shaft (14) which is connected in a rotationally locked manner with the screening arrangement. The input shaft (20) is connected with the output shaft (14) via a transmission shifting device, in particular a planet gear (21). Between the transmission shifting device and the output shaft, a mechanism is engaged for limitation of the transferred driving torque. This mechanism is constituted by a sliding clutch comprising a first coupling part (25) in connection with the transmission shifting device (21) and a second coupling part (26) in connection with the output shaft (14). The first coupling part (25) may comprise a toothed shaft (24) and the second coupling part (26) a slotted and toothed rim (27), or vice versa. Furthermore, a braking means is provided for retaining the screening arrangement in an arbitrary position.