Channelized Foam Mattress Core for Compact Self-Inflation
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Solution Overview
Problem
Current portable mattresses face challenges in achieving thermal efficiency and compactability while maintaining user comfort, with existing foam core mattresses being bulky and heavy, and air mattresses being expensive and prone to the 'balloon effect' when self-inflating.
Innovation Solution
The use of channelized foam cores with elongate extending air channels and reduced bonded areas, allowing for increased compactability and user comfort through the creation of unitary and non-unitary core structures from a single slab of foam, and the integration of serpentine metalized films to enhance thermal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If holes and voids are created in foam cores to decrease weight and bulk, then weight and compactability improve, but manufacturing complexity increases and waste is generated
Solution Approach 1:
The foam core is segmented into multiple sections with voids strategically positioned between bonding regions. This segmentation allows the core to be divided into functional zones: bonding regions that adhere to panels and void regions that reduce weight and bulk, eliminating the need for complex post-manufacturing hole creation processes
Solution Approach 2:
The voids are created during the initial foam core formation process rather than through subsequent intensive processing. The foam core is manufactured with pre-formed voids and bonding regions integrated into its structure, preventing waste generation and reducing manufacturing complexity
2Ease of operation
If internal pressure is increased in cored foam mattresses, then self-inflation capability improves, but mattress thickness increases due to balloon effect
Solution Approach 1:
Bonding regions are strategically positioned between void sections to pre-restrain balloon formation. When internal pressure increases during self-inflation, the bonding regions act as counter-forces that prevent excessive thickness increase, allowing the mattress to self-inflate while maintaining controlled thickness
Solution Approach 2:
Different regions of the mattress have different properties: void regions allow for expansion and self-inflation, while bonding regions provide restraint and prevent balloon effect. This local differentiation enables the mattress to achieve both self-inflation capability and controlled thickness
3Quantity of substance
If foam core compliance is increased to expand slits forming voids, then void formation improves, but bond performance at foam-panel interfaces degrades
Solution Approach 1:
The foam core has different compliance characteristics in different regions: void regions have high compliance to allow expansion and void formation, while bonding regions have lower compliance and higher strength to maintain bond performance. This local quality differentiation resolves the contradiction between void formation and bond strength
4Length of stationary object
If bonded area is reduced to allow localized ballooning, then sectional thickness and comfort improve, but structural integrity may be compromised
Solution Approach 1:
The mattress structure is segmented into bonded regions that maintain structural integrity and void regions that allow localized ballooning for comfort. This segmentation enables different parts of the structure to serve different functions simultaneously
Solution Approach 2:
Different regions have different bonding characteristics: bonded regions provide structural stability and integrity, while non-bonded regions allow localized ballooning to increase sectional thickness and comfort. The local quality differentiation maintains overall structural integrity while enabling comfort enhancements
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 approach results in lighter, more compact mattresses with improved thermal efficiency and user comfort, preventing the 'balloon effect' and allowing for localized ballooning that enhances sectional thickness and perceived comfort.
Implementation Method 1
integration of serpentine metalized films to enhance thermal performance
Implementation Method 2
open cell foam cores
Implementation Method 3
self-inflating mattresses
Data Source
AI summary
An article of manufacture includes an inflatable body comprising a first core member cut from a single slab of core material and a second core member cut from the single slab of core material and coupled to the first core member.