leaf spring sliders

dont see the point of adding another pivot point ,I think the idea is to limit movement to a direct linear motion eliminating arc from the motion .
It was just a thought is all,nothing can be made if an effort is not drawn up. Im no rocket scientist if i was my deep pocket would have a hellcat motor and a full body restore but there kinda empty and im pulling lent out of my wallet now..
I was just wondering but thanks for your input im grateful.