Seating Furniture Backrest with Anisotropic Textile for Lumbar Support
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Solution Overview
Problem
Existing seating furniture designs do not adequately enhance ergonomics and comfort, particularly in providing effective lumbar support, as the textile material used is equally elastic in both horizontal and vertical directions, lacking resistance when a user leans against it.
Innovation Solution
Incorporating a section of textile material between the frame parts that is less elastic in the horizontal direction than in the vertical direction, specifically in the lower area to form a lumbar support, using polyester filament threads that are less stretchable than the rest of the material, and an adjustable tension mechanism to increase tension and reduce elasticity further.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the textile material is made equally elastic in both horizontal and vertical directions, then the comfort and flexibility of the seating furniture is improved, but the lumbar support function is insufficient because the material lacks resistance when a user leans against it
Solution Approach 1:
The textile material is designed with different elasticity characteristics in different directions: less elastic in the horizontal direction and more elastic in the vertical direction. This anisotropic elastic property allows the material to provide resistance for lumbar support horizontally while maintaining comfort and flexibility vertically.
2Reliability
If the textile material is made less elastic in the horizontal direction to provide lumbar support, then the lumbar support function is improved, but the overall comfort and flexibility of the seating furniture is reduced
Solution Approach 1:
The textile material is designed with different elasticity characteristics in different directions: less elastic in the horizontal direction and more elastic in the vertical direction. This anisotropic elastic property allows the material to provide resistance for lumbar support horizontally while maintaining comfort and flexibility vertically.
3Reliability
If the textile material is made less elastic in the horizontal direction to provide lumbar support, then the lumbar support function is improved, but the complexity of the seating furniture structure increases
Solution Approach 1:
The elasticity parameters of the textile material are changed by selecting specific fiber types and knitting patterns. The material uses a combination of elastic and inelastic fibers arranged in a specific knitting structure to achieve different elastic properties in horizontal and vertical directions, avoiding the need for additional mechanical components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design provides improved ergonomics and comfort by creating a more resistant area for lumbar support, enhancing user posture and overall seating experience.
Implementation Method 1
at least one section of the textile material extending between the two frame parts is less elastic in the horizontal direction than in the vertical direction
Implementation Method 2
it to contain so-called, preferably horizontally running filament threads in section 1.3.1... the filament threads are designed to be less stretchable than the rest of the textile material
Implementation Method 3
the adjustment mechanism 2 is designed to apply additional tension to the textile material... making it even less elastic at this point
Data Source
Figure 1
AI summary
The invention relates to a seating furniture comprising a backrest (1) having two frame parts (1.1, 1.2) between which a textile material (1.3) is stretched to form a back support surface for a user. According to the invention, at least one section (1.3.1) of the textile material (1.3) extending between the two frame parts (1.1, 1.2) is less elastic in the horizontal direction than in the vertical direction.