Three-person sofa

Abstract

The invention discloses a three-person sofa. The three-person sofa has the advantages that the stability of a cushion and a backrest is kept while a user sits in the sofa, the backrest and armrests are hidden after a sofa bed is formed, and the using comfort level of the sofa is increased. According to the technical scheme, the sofa is characterized in that a sofa base backs onto an opening in oneside of the backrest, a containing cavity is formed, the whole cross section of the sofa base is in a right-angled n shape, the backrest and handrails are rotationally connected to the sofa base through rotating shafts, an extension frame is slidably connected to the interior of the containing cavity through a sliding rail, an extension pad is arranged on the extension frame, a lifting mechanismfor changing the height of the extension pad is arranged between the extension pad and the extension frame, the lifting mechanism comprises a shear fork type lifting piece and an adjusting cylinder, one side of the shear fork type lifting piece is hinged to the extension pad and the extension frame separately, and the other side of the shear fork type lifting piece is slidably connected with the extension frame and the extension pad separately, after the sofa bed is formed, components of the sofa bed can be kept flat, and the influence of the handrails and the sofa on the comfort level is avoided.

Description

technical field [0001] The invention relates to the technical field of upholstered furniture, in particular to a three-person sofa. Background technique [0002] "Sofa" is a foreign word, transliterated from the English word sofa. An upholstered multi-seat chair. A chair with a spring or thick foam plastic, etc., with armrests on both sides, is a kind of upholstered furniture. According to style, sofas can be divided into American sofas, Japanese sofas, Chinese sofas, European sofas, and modern sofas. [0003] There are generally three types of sofas on the market: low-back sofas, high-back sofas, and ordinary sofas between the former two. [0004] The low-back sofa is a rest-type light chair. It supports the user's waist (lumbar spine) with a support point. It is beneficial to rest, and the peripheral size of the whole sofa is correspondingly reduced. This kind of sofa is more convenient to move, light and handy, and occupies a small area. [0005] High-back sofa, also...

AI Technical Summary

Problems solved by technology

[0008] Although this longitudinally foldable cushioned sofa bed can form a double or triple bed made up of six or nine cushions after unfolding, its seat cushion and backrest cushion are hinged to each other and can break away from the sofa seat. The seat cushion is unstable during use, and it is easy to shake, which reduces the comfort. At the same time, after forming a double or triple bed, the backrest and armrests are still erected, which has a great impact on the comfort of the sofa bed.

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