“Book” is the most traditional, simple and economical model of sofas. Any furniture factory at one time produced such sofas, although now, due to some difficulties in operation, they have ceased to be popular with customers. In order to lay out the “book”, the structure must be slightly pushed away from the wall (about 15 cm), and then – again installed in place.”Eurobrnizhka”. To date, such sofas are the most affordable and reliable products. This model differs from the traditional “book” in that it does not need to be pushed from the wall when laying out: just roll out the seat forward and lower the back. As a result of these manipulations, you get a full double bed.”Mixotuale”. Modern upholstered furniture with this mechanism is ideal for a children’s room and as a spare bed for guests. The frame in sofas of this type is made of metal reinforced pipes and is equipped with orthopedic armor of bile plywood.”Dolphin”. The trajectory of laying out a sofa equipped with a mechanism of this type resembles a graceful jump of a dolphin. The mechanism is used in most corner models and makes it possible to create convenient, high and even sleeping places.”Click-Clak”. It is laid out in the same way as a “Eurobroist”, but has another added position – “relaxation”, in which a person can half sip on the couch. Even in a fully laid out state takes up a little space, so it is great for small rooms. As a rule, sofas with such a mechanism are supplemented by linen boxes and removable covers.”Tango”. The mechanism is identical “click-cracker”, but even more convenient. Tango sofas are equipped with raster armrests that can be lifted and omitted. With raised armrests, the sofa becomes more compact and comfortable. As a rule, these models have orthopedic lactic lattices, linen boxes and removable covers.”Accordion”. The sofa consists of three parts and is laid out “accordion”. Elements from a durable whole tree (oak, beech) give the design orthopedic properties. This mechanism is often used in the manufacture of upholstered furniture in the “high-tech” style.