BEAD-CHAIN DRIVING CLUCH FOR SUPER-HEAVY-DUTY ROLLER BLIND WITH SELF-LOCKING COIL SRPING SYSTEM DRIVEN PRIOR TO PLANETARY GEAR DECELERATOR

摘要

The invention releases a BEAD-CHAIN DRIVING CLUCH FOR SUPER-HEAVY-DUTY ROLLER BLIND WITH SELF-LOCKING COIL SPRING SYSTEM DRIVEN PRIOR TO PLANETARY GEAR DECELERATOR which comprises the following components in order: Cluch base, sprocket wheel, rotating arm, self-locking coil spring system, planetary gear decelerator, traveling limit device. The mechanism of the invention is as follow: unscrew the bolt from the Cluch base and attach the chain guide apparatus to opening A or opening B on the base to achieve from-the-top installation; to opening C or opening D to achieve lateral installation thus achieving flexibility and extending applicability to meet the need of different location and positioning to install, be it from the top, from the left or right. The invention places the self-locking coil spring system prior to the planetary gear decelerator, reduces pre-tension by leveraging the force from the blind through the planetary gear decelerator before transferring the force to the spring, thus the effort needed to pull the chain is reduced.