Blinds rope/chain stop

I made this small piece to hold the rope of blinds.
Probably because of wear my blinds were not able to keep their position, slowly rolling down.

it works with the kind of rope made of small beads.
Mine are 4.4mm diameter and 1.5mm apart

This design might not work with larger / closer beads

The support is meant to be attached to the wall, window frame with some adhesive material.