Rigid belt actuator

So imagine a big, flat, wide belt that is really strong and doesn't bend easily. We call it a "rigid belt." Now take one end of that belt and attach it to something you want to move, like a heavy door or a big box.

Next, we need to make the belt move. We can do that by using a motor - a special machine that spins really fast and creates energy. We attach the motor to the other end of the belt, and when we turn it on, the belt will start to move too.

Because the belt is rigid, it will only move in one direction - kind of like a train going down a track. So if we want to move the door or box, we can control the direction and speed of the belt and it will pull the object along with it.

Overall, a rigid belt actuator is just a way to use a strong, straight belt and a motor to move things in a controlled way.