Foamed Resin Skeleton Structure for Softer Seat Pad Touch
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Solution Overview
Problem
Conventional resin foamed bodies fail to adequately improve the sense of touch due to changes in compression and shearing rigidity when density is adjusted, limiting the ability to enhance seating comfort.
Innovation Solution
A resin foamed body with a skeleton structure comprising bone parts and connection parts, where the bone parts have a constant cross-sectional area section and a changing section with a specific ratio of cross-sectional areas, optimizing the ratio of shearing to compression rigidity to enhance the sense of touch and surface touch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the density of the resin foamed body is adjusted to improve seating comfort, then the compression rigidity changes, but the shearing rigidity also changes making it impossible to sufficiently improve the sense of touch
Solution Approach 1:
The patent applies local quality by creating bone parts with non-uniform cross-sectional areas along their length. Specifically, the bone parts have a larger cross-sectional area at one end and a smaller cross-sectional area at the other end, allowing different regions of the same component to have different mechanical properties. This enables the resin foamed body to have varying rigidity characteristics in different locations, improving the sense of touch while maintaining necessary structural strength.
Solution Approach 2:
The patent employs parameter changes by modifying the cross-sectional area parameter of the bone parts along their length. The cross-sectional area varies continuously or discontinuously from one end to the other, creating a gradient in mechanical properties. This parameter variation allows optimization of the sense of touch by controlling how the structure deforms under localized pressure, independent of overall density changes.
2Ease of operation
If the density of the resin foamed body is adjusted to improve seating comfort, then the compression rigidity changes, but it becomes difficult to maintain appropriate compression rigidity while improving sense of touch
Solution Approach 1:
The patent applies local quality by creating bone parts with non-uniform cross-sectional areas along their length. Specifically, the bone parts have a larger cross-sectional area at one end and a smaller cross-sectional area at the other end, allowing different regions of the same component to have different mechanical properties. This enables the resin foamed body to have varying rigidity characteristics in different locations, improving the sense of touch while maintaining necessary structural strength.
Solution Approach 2:
The patent employs parameter changes by modifying the cross-sectional area parameter of the bone parts along their length. The cross-sectional area varies continuously or discontinuously from one end to the other, creating a gradient in mechanical properties. This parameter variation allows optimization of the sense of touch by controlling how the structure deforms under localized pressure, independent of overall density changes.
3Quantity of substance
If conventional density adjustment methods are used, then material usage can be reduced, but the sense of touch cannot be sufficiently improved
Solution Approach 1:
The patent applies local quality by creating bone parts with non-uniform cross-sectional areas along their length. Specifically, the bone parts have a larger cross-sectional area at one end and a smaller cross-sectional area at the other end, allowing different regions of the same component to have different mechanical properties. This enables the resin foamed body to have varying rigidity characteristics in different locations, improving the sense of touch while maintaining necessary structural strength.
Solution Approach 2:
The patent employs parameter changes by modifying the cross-sectional area parameter of the bone parts along their length. The cross-sectional area varies continuously or discontinuously from one end to the other, creating a gradient in mechanical properties. This parameter variation allows optimization of the sense of touch by controlling how the structure deforms under localized pressure, independent of overall density changes.
Data Source
AI summary
A resin foamed body 1 is a resin foamed body made of flexible resin, the resin foamed body entirely includes a skeleton part 2, the skeleton part includes a plurality of bone parts 2B and a plurality of connection parts 2J connecting end parts of a plurality of bone parts, and an average value AV(A0/A1) of a ratio A0/A1 of cross-sectional area A0 of a bone change part of each bone part at an edge 2B22 on a bone constant part side relative to cross-sectional area A1 of the bone change part at an edge 2B21 on the connection part side satisfies0.15≤AV(A0/A1)<0.5.