Winding device for a roller shade with a self-locking function to prevent the roller shade from incurring detachment during reverse rotation

摘要

The device comprises a side bracket 1, a self-locking unit 2 and a return wheel module 3. The self-locking unit and return wheel module are mounted within a receiving space of the side bracket. The self-locking unit comprises at least one support member 21 and at least one stop member 22. The return wheel module comprises a return wheel 31, a winder wheel 32 and a volute spiral blade spring 33 arranged between the return and winder wheel. The volute spiral blade spring is wound around the return wheel and has a distal end 331 connected to the winder wheel in a different direction to form a connection and the spring blade is provided with a locking portion 332 that is located at the distal end and is moveable to lock the stop member. The device may have a plurality of return wheels, a plurality of winder wheels and a plurality of volute spiral blade springs.