Not all sofa beds are alike, as evidenced by the Adam horizontal wall bed unit from Bonbon. Designed to fit into an office or den setting, the actual bed pulls down from the wall to cover the sofa. The clever setup is a bit different than the typical convertible sofa, but the Murphy bed-type solution still allows for a multi-functional space.
The development of this new product was inspired by the growth of the Murphy Wall-bed business in the USA and the industry's need for a better designed bed system. Description from s3.amazonaws.com. I searched for this on bing.com/images