Sofa beds and their various types are identified by the mechanism by which they are operated. That is, how to convert the sofa into a bed. There are different mechanisms applied. You have the common pull out type, the fold out type, the twist and pull type and the lift and snap type.
Description of the fold out sofa bed
The fold out sofa bed is a type that totally converts the sofa seat surface and the fold-ins into a bed. That is, the sofa seat itself form part of the resulting mattress. This fold out type forms a sleeper surface that is much like being on the ground with its arms and backrest forming the headboard. The mattress is actually the three layer unfolding of the sofa seat surface that was initially stacked.
Mechanism of operation
To get the bed form from the sofa is quite simple. First, raise the bottom of the sofa, pull and just fold out the three layer cushions of the initial seat and that is it! It comes flat on the ground. Quite simple and there is no need for a mattress anywhere. To go back to the sofa, follow the reverse of the mechanism and you get your sofa back to the original couch.
What makes this type unique?
The fold out sofa bed is very economical and simple to operate. If you are in a small room, this is the right choice of sofa bed style that will take care of your need for space. It should be less expensive because there is no extra mattress needed for this design coupled with complex metal frame designing.
It is much a light weight sofa bed due to its minimal design. The wooden frame can be visibly seen only with the backrest and arms. Legs are clearly not seen as the the three layer cushion stack is the seat surface and the metal frame is equally almost absent. You don’t need the mechanical click or snap movement here.