Why do some Shelf Talkers have a hinge

Since Shelf Talkers occupy quite a large area on the shelf edge in order to better promote products, they can sometimes be knocked by customers removing products from the shelf to place in their basket.

This could cause the Shelf Talker to be dislodged, so the more sophisticated models often feature additional bends to make them more springy or a hinge so they drop back into position if pushed out of the way.