Split-Sole Dance Shoe Reinforcing Structure for Arch Support
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Solution Overview
Problem
Dance shoes lack a balance between flexibility and controlled resistance, leading to inadequate ankle and arch support, which can result in injuries and a less aesthetically pleasing appearance due to creasing, bunching, and sagging of materials during extreme movements.
Innovation Solution
A split-sole dance shoe design incorporating a thin, flexible semi-rigid reinforcing structure made of materials like EVA foam, which provides support and resistance while maintaining a smooth, unbroken cosmetic line by extending from the heel through the arch section without compromising flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shoe upper and sole structure are made extremely flexible to enable wide range of movement, then the ease of operation is improved, but the strength and stability of ankle and arch support deteriorates
Solution Approach 1:
The patent applies different material properties to different regions of the shoe. The forefoot section uses highly flexible materials to enable movement, while the heel section incorporates a stiffer counter and the arch section uses a flexible board to provide support. This local differentiation allows the shoe to be flexible where needed while maintaining strength in critical support areas.
Solution Approach 2:
The shoe construction combines multiple materials with different mechanical properties: flexible leather or synthetic materials for the upper, a stiffer heel counter material, a flexible board for arch support, and various sole materials. This composite approach enables the shoe to simultaneously achieve flexibility for movement and structural support for the ankle and arch.
2Ease of operation
If the shoe is allowed to bend and flex freely, then the ease of operation is improved, but the shape and cosmetic appearance deteriorates due to creasing, bunching, and puckering
Solution Approach 1:
The patent strategically places rigid and semi-rigid elements in specific locations to control flexing. The heel counter provides a stable anchor point, the flexible board in the arch section controls bending in that region, and the split-sole construction allows controlled flexing at the forefoot. This localized structural control prevents unwanted creasing and bunching while preserving necessary flexibility.
3Weight of moving object
If lightweight and flexible materials are used throughout the shoe, then the weight is reduced and ease of operation is improved, but the strength and support capability deteriorates
Solution Approach 1:
The patent uses lightweight flexible materials for the shoe upper and forefoot sections where weight reduction is most beneficial, but strategically places heavier, stronger materials in the heel counter and flexible board regions where structural support is critical. This localized material distribution minimizes overall weight while maintaining necessary strength.
Solution Approach 2:
The shoe combines lightweight materials (leather, synthetic uppers, thin sole materials) with stronger support elements (heel counter, flexible board, stitching reinforcement). This composite construction achieves an optimal balance between weight and strength, providing foot support without excessive weight.
4Ease of manufacture
If no reinforcing structure is added to maintain flexibility, then the ease of manufacture is improved, but the reliability and protection against injury deteriorates
Solution Approach 1:
The patent adds reinforcing elements only in specific critical regions: the heel counter for ankle stability, the flexible board for arch support, and reinforcement stitching at stress points. The rest of the shoe maintains simple construction for ease of manufacture. This targeted reinforcement approach improves reliability without significantly complicating the manufacturing process.
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 enhances muscle strength and stability by offering controlled resistance during foot flexions, reduces visual distractions from creasing, and maintains a sleek appearance by ensuring even displacement of shoe materials during movement.
Implementation Method 1
thin flexible semi-rigid reinforcing structure made of materials like EVA foam, which provides support and resistance while maintaining a smooth, unbroken cosmetic line
Implementation Method 2
thin flexible semi-rigid reinforcing structure made of materials like EVA foam, which provides support and resistance while maintaining a smooth, unbroken cosmetic line by extending from the heel through the arch section without compromising flexibility
Data Source
AI summary
A split-sole dance shoe, comprising:a thin flexible shoe upper defining an opening to receive a foot;an outsole region to underlie a sole of the foot and in combination with the upper defining a heel section, an arch section and a forefoot section; andthin flexible reinforcing structure coupled to the shoe upper and the outsole region and extending from adjacent the opening in an upper part of the heel section around a lower part of the heel section and through the arch section along a longitudinal direction of the shoe, the reinforcing structure broadening from adjacent the opening to substantially cup a lower posterior portion of the calcaneus and then narrowing toward the arch section, the reinforcing structure in the arch section being arranged to closely match flexion of the arch in pointe position without the appearance of bunching of the shoe upper in the arch section.