EVA Foam Insole with Arch Protrusions for Shock Absorption
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Solution Overview
Problem
Conventional support insoles are weak in shock absorption and fail to provide adequate cushioning to the arch and heel portions of the foot, leading to fatigue and discomfort during walking.
Innovation Solution
An ergonomically designed support insole with a flexible upper layer made from foam materials like EVA, Latex, and PU, and a flexible lower layer made from TPRs or TPEs, securely bonded together with a middle medium, featuring protrusions and a concave recess to distribute weight and provide enhanced cushioning and support to the arch and heel areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional support insole is fabricated from leather, then it provides basic support to the foot, but it is weak in shock absorption
Solution Approach 1:
The patent applies composite materials by combining an elastic base layer with a foam material layer. The elastic base layer provides support and flexibility, while the foam material layer enhances shock absorption. This composite structure resolves the contradiction by integrating the strengths of both materials to achieve both support capability and shock absorption.
2Object-affected harmful factors
If an elastic material support insole is used, then it absorbs shock and is suitable for every pair of shoes, but it is too soft and weak in resistance against ground impact
Solution Approach 1:
The patent combines elastic material with foam material to create a composite insole structure. The elastic base layer maintains flexibility and shock absorption, while the foam material layer adds structural support and impact resistance. This resolves the contradiction between being too soft and needing impact resistance.
3Device complexity
If the hindfoot portion is made flat, then it is simple in structure, but it fails to provide cushioning effect to the heel, causing discomfort
Solution Approach 1:
The patent applies local quality by creating a heel protrusion with a concave recess specifically at the hindfoot portion. This localized structural modification provides targeted cushioning to the heel area without complicating the overall insole structure. The concave recess specifically addresses the need for heel cushioning while maintaining simplicity elsewhere.
4Device complexity
If the arch portion is left without support, then the insole structure remains simple, but it causes fatigue to the walking foot
Solution Approach 1:
The patent applies local quality by adding arch protrusions at the midfoot region to provide targeted support to the arch portion. This localized structural addition provides necessary arch support to prevent foot fatigue without significantly complicating the overall insole structure. The arch protrusions are strategically placed to provide support exactly where needed.
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 insole effectively reduces foot fatigue by providing better impact resistance and cushioning, balancing weight distribution across the foot, and preventing discomfort by stabilizing the heel, thus enhancing walking comfort.
Implementation Method 1
the flexible upper layer is made from foam materials like EVA, Latex, and PU... the same provides effective cushioning support to the arch portion and the heel portion of the wearer's foot
Implementation Method 2
the elastic materials can absorb the shock caused during walking, thereby protecting the foot from being injured
Data Source
AI summary
An support insole includes a middle medium sandwiched between flexible upper and lower layers, wherein upper layer has a forefoot region with a metatarse protrusion that projects upward from an upper surface of the upper layer to a certain height, a midfoot region with inner and outer arch sides, wherein the inner arch side has an inner arch protrusion that projects upwardly from the upper surface to a certain height and wherein the outer arch side has a plurality of outer arch protrusions that project upwardly from the upper surface to a certain height, a hindfoot region with a heel support protrusion that projects upwardly from the upper surface to a certain height, wherein the top face is dented inwardly so as to form a concave recess such that the support insole is ergonomically designed to provide comfort for a wearer.