Layered Sofa Seat Cushion Core for Body Contouring and Shape Retention
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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 due to limited durability and comfort.
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 upholstery-grade polyurethane foam is used in 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 contouring and shape retention, and polyethylene terephthalate for durability. This composite structure allows each material to contribute its strengths, resolving the contradiction between basic support 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, with the memory foam layer specifically addressing shape retention while other layers provide support and durability
2Adaptability or versatility
If conventional polyurethane foam is used, then the cushion structure is simple, but it has limited capacity for conforming to a person's body
Solution Approach 1:
The introduction of memory foam as a distinct layer adds body conforming capacity through its viscoelastic properties, while the overall multi-layer composite structure maintains manageable complexity through clear functional differentiation of each layer
Solution Approach 2:
The memory foam layer is specifically positioned to provide local conforming quality where it is most needed for body contact, while other layers maintain their respective functions for support and structure, allowing adaptability enhancement without uniformly increasing complexity throughout the entire cushion
3Ease of operation
If Dacron is used to maintain visual appearance through friction, then the cushion surface remains stable, but the cushion lacks comfort and pressure relief capabilities
Solution Approach 1:
The cushion is segmented into functional layers where Dacron maintains surface stability in the intermediate layers, while the memory foam comfort layer provides pressure relief and comfort. This segmentation allows both surface stability and comfort to coexist without compromising either function
Solution Approach 2:
The combination of Dacron's friction-based surface stability with memory foam's pressure-distributing comfort properties creates a composite structure that delivers both surface stability and enhanced comfort, resolving the contradiction between these two requirements
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 durability by allowing the cushion to contour to a person's body and maintain its shape, while the memory foam and polyurethane layers ensure long-lasting support and pressure relief.
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 memory foam layer comprises a gel-infused visco-elastic memory foam
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.