roller blind

The goal was to create a working model from available materials . This model is based on a 10 mm aluminum tube.You can pick up any phone. It is enough to change the diameter at the end of the stop. So that it would be the same diameter as the base . An ordinary rubber band is used in the locking mechanism
There are two main bushings because after assembly there was not enough space to place the cord, the curtain is unwound under its own weight. It rises by pulling the cord
The chain consists of only two links, since there is a limit on the volume of the file. You can make any length from two links .Just by multiplying