Removable Sneaker Toe Box Protector With Flexible Foam Composite
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Solution Overview
Problem
Existing removable toe box protectors for sneakers are uncomfortable for users despite reducing or preventing creasing.
Innovation Solution
A removable toe box protector with a sandwich structure comprising an outer and inner layer of flexible cellular foam and an intermediate core layer of solid polymeric material, designed to fit snugly around the foot, providing comfort and protection against creasing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid polymeric material is used to prevent creasing, then protection against creasing is improved, but user comfort deteriorates
Solution Approach 1:
The patent applies composite materials by combining a rigid polymeric material layer with a soft cushioning layer. The rigid layer provides crease protection while the soft layer ensures user comfort. This multi-layer composite structure resolves the contradiction between protection effectiveness and comfort during wear.
Solution Approach 2:
The patent applies local quality by providing different material properties in different regions of the toe box protector. The rigid polymeric material is positioned where crease protection is most needed (on the outer surface facing the sneaker upper), while the soft cushioning material is positioned on the inner surface contacting the foot. This spatial differentiation of material properties simultaneously achieves both protection and comfort.
2Reliability
If a thick polymeric material is used to prevent creasing, then protection against creasing is improved, but flexibility and comfort deteriorate
Solution Approach 1:
The patent uses composite materials with distinct thicknesses for each layer. The rigid polymeric material layer is positioned to provide crease protection, while the soft cushioning layer is positioned to provide flexibility and comfort. This composite structure allows each layer to be optimized for its specific function without compromising the other.
Solution Approach 2:
The patent applies local quality by varying the thickness and material properties in different zones. The rigid layer provides structural support where needed, while the soft layer provides flexibility and conformability to the foot's shape. This localized differentiation resolves the contradiction between protection and adaptability.
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 protector effectively prevents creasing while maintaining high user comfort by using flexible foam layers and a reinforced core layer, ensuring flexibility and reduced discomfort during prolonged wear.
Implementation Method 1
an outer and inner layer which respectively comprise a flexible cellular foam
Implementation Method 2
a sandwich structure comprising an outer layer comprising flexible cellular foam, an inner layer comprising flexible cellular foam and an intermediate core layer comprising a reinforcement layer of solid polymeric material
Data Source
AI summary
A toe box protector, for removable insertion into a toe box of a sneaker to prevent the upper surface of the toe box from creasing, including a central portion defining a front part of the toe box protector and, adjacent thereto, first and second opposite wing portions which extend rearwardly of the central portion. The central portion and the first and second opposite wing portions define upper and lower edges of the toe box protector having a sandwich structure of outer and inner layers of flexible cellular foam, and an intermediate core layer of a reinforcement layer of solid polymeric material. The intermediate core layer has a lower edge spaced inwardly from the lower edge of the toe box protector, the lower edge having a two layer structure of a peripheral flexible unreinforced lower band in which the outer layer is bonded directly to the inner layer.