Built-in belt winder with reduced fitting depth e.g. for roller blinds, has two plates and belt reel core which is swivellingly stored between both plates and connected at front side with reel core gear wheel

The winder has two plates (7, 8) and a belt reel core (15), which is swivellingly stored between both plates and connected at the front side with a reel core gear wheel (16). A first gear wheel set (30) is swivellingly stored between the plates and a second gear wheel set (25) is swivellingly stored between the plates. A pinion (27) having a gear wheel (31) of the first gear wheel set for a third gear wheel set and a front gear wheel (23) is provided with a driving motor (17), whose motor shaft connects to the gear of the third gear wheel. Bei einem Unterputzgurtwickler taucht, um Bauraum zu sparen, die mit einer Schnecke versehene Welle des Antriebsmotors in den Raum zwischen zwei Zahnradsätzen ein. DOLLAR A Für den Fehlerfall ist vorgesehen, dass wenigstens eines der Zahnräder in axialer Richtung verschiebbar ist, um den Kraftfluss von dem Wickelkern zu dem Antriebsmotor zu unterbrechen, damit der Rollladengurt entspannt werden kann.