Sofa seat cushion core
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Solution Overview
Problem
Conventional sofa seat cushions lack the ability to effectively conform to a person's body and maintain their original shape and performance over time, resulting in limited comfort and durability.
Innovation Solution
A sofa seat cushion design featuring a cushion core with pocketed springs enclosed in an upholstery foam envelope, combined with a memory foam layer that molds to the body and quickly returns to its original shape, along with polyethylene terephthalate layers for added support and durability, and exterior upholstery for a plush surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyurethane foam is used for the cushion core, then the cushion provides basic support, but it quickly loses its original shape and has limited durability
Solution Approach 1:
The patent combines multiple materials with different properties: polyurethane foam for support, memory foam for conforming and shape retention, and polyethylene terephthalate for friction and stability. This composite structure allows each material to contribute its strengths, resulting in a cushion that maintains both durability and long-term shape retention.
Solution Approach 2:
The cushion is divided into distinct functional layers: a support layer with polyurethane foam and pocketed springs, a comfort layer with memory foam, and intermediate layers with polyethylene terephthalate. This segmentation allows each layer to perform its specific function optimally while working together as a unified system.
2Adaptability or versatility
If conventional polyurethane foam is used for the cushion core, then the cushion structure is simple, but it has limited capacity for conforming to a person's body
Solution Approach 1:
The patent applies different material properties to different layers of the cushion. The memory foam layer specifically provides body-conforming capability through its viscoelastic properties, while the polyurethane foam layer provides structural support. This localized application of specialized materials enables body conforming without requiring the entire cushion structure to be complex.
3Ease of operation
If memory foam layer is added to mold to the body, then comfort is improved, but the cushion structure becomes more complex
Solution Approach 1:
The memory foam layer serves multiple functions: it conforms to the body shape for comfort, provides pressure relief, and maintains its shape over time. By integrating this multi-functional layer into the cushion structure, the patent achieves enhanced comfort while the overall complexity is managed through systematic layer integration rather than adding separate independent systems.
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 enhanced comfort and support by conforming to the body while maintaining the original shape, improving durability and longevity of the cushion, and offering better pressure relief and heat distribution compared to conventional cushions.
Implementation Method 1
At least one memory foam layer positioned above the upholstery foam envelope comprises a material composition capable of molding to a person's body sitting on the sofa seat cushion and then quickly returning to an original shape once the person leaves the sofa seat cushion
Implementation Method 2
The pocketed springs are positioned side by side in a spring layer arrangement and are independently operable
Data Source
AI summary
An apparatus and method are provided for a sofa seat cushion comprising a cushion core including a multiplicity of pocketed springs enclosed within an upholstery foam envelope. The pocketed springs are positioned side by side in a spring layer arrangement and are independently operable. A memory foam layer positioned above the upholstery foam envelope comprises a material capable of molding to a person's body sitting on the sofa seat cushion and then quickly returning to an original shape once the person leaves the sofa seat cushion. The memory foam layer comprises a gel-infused visco-elastic memory foam with a polyethylene terephthalate layer positioned there above. Directly below the upholstery foam envelope is an upholstery-grade polyurethane foam layer with a polyethylene terephthalate layer positioned directly thereunder. An exterior upholstery surrounding the cushion core provides a plush seating surface.