It is suitable for indoor with small glass roof and family double track plane sun shade system. It could be designed as plane and camber. The dynamical party in this mechanism is used the system of ballchain operation.The significant advantage is low cost and aimed at small window.

manual double tracks folding skylight shade(line)

manual double tracks folding skylight shade(arc)

Using area: glass with tiltable and small plane roof window. Suitable for family use.
Function : many control ways. It can stop at anywhere.
Setting request: The width is 0.65-2m, The length is<5m. The area is<10sq.m.
Control   : operation ballchain
Instruction : Pls note that the minimum radius should be 350mm when the mechanism is
camber shape. Measure the length must measure arc height and chord length at the same time.