Creative Idea Sofa Bed

The so-called sofa bed is a sofa with a special construction, which can be transformed so that it becomes flat and can be used to lie like a bed. Basically, a sofa bed is the shape can be changed according to the function. When used as a sofa can be folded, if you want to work as a bed, stay unfold.
There are various forms crease sofa bed. The most standard form, which has existed since a long time to open up the sofa seat towards the front so it becomes long and enough to use lie. design ideas sofa bed are all here, please ???