Belt winder for belt strap of shading device e.g. roller shutter, has adapter that is positively and/or frictionally attached on winding drum of winding device for changing winding drum diameter

摘要

The winder has a winding device, a drive motor unit for winding and unwinding of belt strap and a control device and display elements. An adapter (23) is positively and/or frictionally attached on the winding drum of the winding device for changing the winding drum diameter. The adapter has two equal approximately half shell-shaped portions (24) which engage around the winding drum positively on mutual joining.