It is very simple but first, we should know about the types of manual pull-down projection screens that are down below.
1.) Manual Auto/lock Projection Screen
2.) Manual Pull Down Spring Action
Now, Let’s see what is the difference between these two and how they work.
Manual Auto/lock Projection Screen
The manual auto-lock projection screen locks there were to leave it. There is manual auto-lock projection you are pulling it out of the casing by holding the hook or whatever there is to pull it down. You don’t need to hook it onto a nail or anything it stops automatically and to roll it back you just need to give it a little push and the spring in the casing will do the rest.
Manual Pull Down Spring Action
Also known as the wall type spring action. The core difference between these two was the self-lock mechanism. Manual pull down spring action doesn’t have any instant locking system. So you have to hook the holder onto a nail to make it stop as the spring in constantly pulling it backward.
