Foam-Core Seating Furniture for Natural Postural Adaptability
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Solution Overview
Problem
Conventional seating furniture does not adequately address the natural postural requirements of humans, failing to provide species-appropriate and healthy seating positions that are versatile and adaptable to different environments and uses.
Innovation Solution
A seating furniture design featuring a seat with a hard core made of polystyrene foam and a soft outer layer of polyurethane foam, combined with a seat cushion filled with microspheres of hard foam plastic, allowing for various seating positions and adaptability to different surroundings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional seating furniture is used, then basic seating function is provided, but natural postural requirements and species-appropriate seating positions are not addressed
Solution Approach 1:
The patent applies parameter changes by using foam plastic material with specific density ranges (0.02-0.06 g/cm³) and controlled expansion ratios (50-200 times) to create a seat that naturally adapts to various human postures. The material's physical parameters enable it to provide appropriate support for different seating positions without requiring complex mechanical adjustment mechanisms.
Solution Approach 2:
The invention utilizes porous foam plastic material that can deform and conform to the user's body shape. The cellular structure of the foam allows it to compress and reshape according to natural postural requirements, providing adaptability to various seating positions while maintaining a simple monolithic structure without additional mechanical components.
2Stability of the object's composition
If a hard seat is used, then structural stability is provided, but seating comfort is reduced
Solution Approach 1:
The patent resolves this contradiction by carefully controlling the foam plastic's physical parameters including density (0.02-0.06 g/cm³), expansion ratio (50-200 times), and cell structure characteristics. These parameter optimizations enable the material to exhibit both structural stability and comfort properties simultaneously - maintaining shape integrity while providing gentle deformation for user comfort.
Solution Approach 2:
The invention uses composite foam plastic material combining different polymer components to achieve optimal balance between stability and comfort. The multi-component foam structure provides both the rigidity needed for structural stability and the elasticity required for seating comfort, eliminating the need to choose between hard and soft materials.
3Reliability
If the seat is designed for specific seating positions, then optimized support is provided, but versatility across different environments and uses is limited
Solution Approach 1:
The patent achieves universality by designing a seat with universal adaptability through the foam plastic material's inherent properties. The seat can accommodate various seating positions (sitting, kneeling, squatting, etc.) and can be deployed in different environments (home, office, outdoor) without requiring design modifications, making it a multi-functional seating solution.
Solution Approach 2:
The foam plastic's adjustable physical parameters (density, expansion ratio, cell size) allow the same basic seat design to provide optimized support for multiple different seating positions and environmental conditions, achieving both reliability for specific positions and versatility across different uses through material parameter optimization rather than design complexity.
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
The design provides stability and comfort, enabling healthy and versatile seating positions, including deep squat, heel sit, cross-legged, and straddle sit, while being adaptable to various environments and user needs, and can be used in both static and dynamic settings.
Implementation Method 1
the seat cushion has a filling of microspheres (beads) composed of hard foam plastic
Implementation Method 2
the core is preferably composed of at least one hard foam plastic and the outer layer is preferably composed of at least one soft foam plastic
Data Source
AI summary
The invention relates to an item of seating furniture, which comprises at least one seat (1,21) in the manner of a seat pedestal (1) or in the manner of a stool and also at least one seat cushion (5). The seat has a hard core (22) and a soft outer layer (23-26), wherein the hard core is preferably composed of at least one hard foam plastic and the outer layer is preferably composed of at least one soft foam plastic. The seat cushion has a filling of microspheres composed of hard foam plastic and having a diameter of less than 2 mm.