| 摘要 |
production of furniture. SUBSTANCE: apparatus has supporting member composed of two layers of symmetrical shape or of aircraft wing profile shape, with flexure depth of 0-50 cm in horizontal transverse section and layers rigidity ratio of 1:1.2 -1:3. Rear carrier layer is provided with vertical trough of 2-8 cm width and 0.5-3 cm depth. Apparatus is further equipped with casing and attachment devices. Apparatus is designed for furniture, preferably, chairs for operators, school furniture, vehicle driver's armchairs. Apparatus provides for optimal posture, without arising stress in lumbar muscles, optimal body and neck biomechanics in user's sitting position, improved blood circulation and increased working capacity for user. EFFECT: increased efficiency, simplified construction and convenient usage. 5 cl, 5 dwg |
