Constrution Features:
1,Positive pull the chain ,woller blinds down,reverse the chain ,head only unlock,roller blind automatically up.
2.The technique is equipped with retarder,and the roller blinds rises instantly and stably.
3.Roller blinds can be stopped at any peak .
four.By altering the number of pre tightening turns of increase spring,the increasing pace of roller blinds can be adjusted 
five,one:1.five reduction ratio is  adopted for the clutch generating ,which tends to make it simpler to the chain.
six,The system is outfitted with a limiter,and the roller blinds will routinely quit when it rises/falls to a fixed place

Efficiency Attributes:
1.Min width:.95mm
2.Max Peak 3m
3,Max load 6kg