Sofa transformer
The easiest way to make a sofa foldable, attaching toframe hinges and folding legs. But now many manufacturers of folding sofas all over the world use a more perfect mechanism - a folding metal frame frame with attached "armor", slightly bulging springs of wood. They give the orthopedic properties of the mattress - the spine remains straight. The "planar" surface forms the base of the bed. On sale there are about a dozen differentmechanisms of transformation, but most often - "book" (varieties: "couch" or "eurobook" and "click-klyak"), "French clamshell", "accordion", "rollout" and "dolphin."
Book and eurobook
One of the most well-known mechanisms,which has proved itself over many years of use. "Book" is a mechanism that can be unfolded by tilting the backrest back (until it clicks) and slightly pushing the seat forward. It is made using two wooden frames and spring blocks, which makes it especially durable and comfortable. It has two positions: "sofa" and "bed". "EuroBook" is considered to be one of the most enduringand long-lasting transformation mechanisms. The European alternative to the "book" is the folding mechanism conventionally called the "couch" ("eurobook"). The principle of its operation is simple: the seat extends forward, and the cushions of the back are lowered into the formed space. We can say that there are virtually no shortcomings in such mechanics. In this case, the size of the bed can be very large. Also there is a box for laundry.
Click-Clack
"Click-Clack" is an analogue of the Eurobook. This is one of the most modern transformation mechanisms developed by French engineers. But in the Click-Klack design, there is an additional intermediate position of the "Relax" backrest (or even two of its variants), thanks to which the person can be located in a semi-sitting and reclining position. This type of sofa is ideal for small rooms and even in the unfolded state does not take up much space. He does not need extra space in front of him.
Accordion
Due to the fact that the sofas with the accordion mechanism have a high, wide and even sleeper, they are great for a night rest. The mechanism is laid out without difficulty, according to the principle of accordion.
French clamshell
The name "French clamshell" speaks for itselffor itself - the sofa of this model really looks like a cot. The bed in it is made of tarpaulin, reinforced with slats. This mechanism is not intended for daily use. This "guest" option - the metal grid quickly becomes unusable and begins to creak desperately. When folded, this sofa is very compact and does not take up much space, and its design can be very diverse.Withdrawable
The withdrawable is the most durable mechanism,designed for frequent transformation. First, for the king (lower front panel), a seat is pulled out, consisting of two parts located one above the other. The third part becomes the headrest and hides in the back. This mechanism is also installed in expensive models.
Dolphin
This mechanism, as a rule, is used in angularsofas. "Dolphin" consists of several parts, one of which is under the seat in a special drawer compartment. The second part is contained in a special retractable block located under the seat. Despite the massive structure of the berth, the lifting mechanism makes it possible to raise it without much effort and fix it in the upper position.Before choosing a sofa, you need to clearly know itthe maximum size and provide for all of its "transforms" because it can happen that a carpet with a long nap will become an obstacle to buying an expensive and extremely comfortable sofa with a "rolling out" mechanism or an "accordion".
