| 摘要 |
A carcass of a transformable sofa bed comprises a frame with a deck fixed with possibility of connection with furniture elements, which contains sections with possibility of their folding and unfolding, and convertible legs on the top section. The frame contains bottom and top sections with the decks fixed on them and middle section hingedly connected thereto in the form of longitudinal and cross metal pipes. Thus the bottom section and the middle one are fixed on a motionless basis, which contains the springs connected to the bottom section with possibility of lifting thereof in the vertical plane, and a support element of the middle section.
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