Abstract: This paper introduces the history of the development of the folding sofa bed and the domestic and foreign research status, through the summary found that the folding sofa bed can be divided into two types: open structure and closed structure.
Key words: folding sofa bed; research status; open structure; closed structure
1 research background
The small size of the family population, the rapid rise in house prices and the implementation of the national housing macro-control policies, so that the people of the past to pursue a large living area of the concept of re examination. In saving building materials, water saving, saving the use of cost and other aspects of the dominant small Huxing units will become the focus of future home buyers.
Small Huxing generally refers to a living room area of about 30m2-50m2, two bedroom area of about 60m2-80m2, three bedroom area in the residential area around 80m2-100In2. Small Huxing area, the space is relatively compact, the living room area within 20m2, the bedroom area within 15m2, regardless of one bedroom, two bedroom or three bedroom, usually only one bathroom. It is characterized by a relatively small area of each space, but the small size does not mean that the owner of the living comfort requirements of the lower. In fact, the design of large-sized apartment Home Furnishing still has the characteristic of "small but complete". Thus, for the area to reduce the contradiction with the functional requirements of the contradiction, how innovative design, so that a small area, small space with a large use, so that life is more comfortable and wonderful, has important practical significance.
2 folding sofa bed domestic development history
2.1 domestic patents
(1) Name: variable type sofa bed
Patent No.: 88102885.1
Patent map:
(2) Name: a new mechanism for the sofa bed
Patent No.: 1806420.5
Patent map:
(3) Name: combined sofa bed
Patent No.: 88208033.4
Patent map:
3 research status at home and abroad
At home and abroad, the design of multi functional furniture for the majority of cases are in the majority, specifically for its theoretical research is relatively small.
The domestic theoretical research started earlier focus on functional and spatial characteristics: 1998, ~ 1 Dai Xiangdong ~ 2 in the furniture design new ideas, "pointed out: in traditional design method, functional properties of furniture analysis, and give full consideration to the changes in people's way of life, furniture design some new design method is proposed, to expand the furniture design idea" I. Presented in the paper stack stack, decomposition and combination of furniture design conceiving method is quite forward-looking and practical significance, although the authors have on these two methods structure, materials, and other aspects of in-depth and detailed analysis, but overall research on this topic also has great reference value.
Foreign although multifunctional furniture design methods and principles for research is still not deep enough, but the design case is relatively rich, 1969, the Italian Nakasi company Colombo design out a set of known as the "additional series of sofa is composed of a plurality of square shaped foam monomer composition, these monomers are large, medium and small, such as several different specifications can be arbitrary axial fixed on the base to form square stool, bench, Changsha and multiple seating. 1999 Norwegian stoke company introduced the a by the name of Knudsen and Gehlaut Don Lund gronlund (Knudsen) design for the "couch" (sleepy) of children's furniture, the furniture can be by a cradle into a bed, into a group of sofas or chairs. This innovative multi functional design can meet the needs of children in the process of growing up.
4 Summary
Above the basic characteristics of these patents: a wide range of folding sofa bed, we find the patent is mainly divided into two categories: open structure and closed structure.
The same sofa bed structure open mechanism. When used as a sofa, bed and CMT and other institutions through some of the folding mechanism into the sofa to sit in the following space; when the need as when the bed is used, as long as the filed a sofa to sit in the predecessor, the whole folding bed can according to collection agencies to determine the trajectory rises, after folding bed slide out, put down before and after the foot of the bed to support the bed. Most of the core structure of the open sofa bed is a combination of the four bar mechanism and the six bar mechanism, and the bed body is added on the basis of the structure.
Closed institutions are also common, the simplest is the sofa backrest by a simple spring mechanism or four-bar mechanism flat, using seat bed and a sofa seat, more economical and practical.
Complex is a combination of other organizations, such as telescopic institutions. Closed six bar and six bar or more institutions to form a separate folding sofa bed is more rare, is basically a collection of institutions as a sofa bed.
reference：
[1] Xing Yuming. Self made folding sofa bed [J]. construction workers, 1986.08:54-55.
[2] Bian. Folding multi-purpose sofa bed [J]. furniture, 1983.01:32-33.
[3] Xue Min. Multifunctional folding sofa [J]. furniture, 1984.05:28-29.