Toe-Post Shoe Structure for Foot Stability Without Compression
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Solution Overview
Problem
Conventional shoes provide inadequate internal support for the foot, leading to foot movement within the shoe, discomfort, and potential failure at the lateral junction due to concentrated forces, which can cause fatigue and discomfort.
Innovation Solution
A shoe design featuring flexible, non-elastic posts positioned between the toes that provide internal support, distributing foot loads and inhibiting motion, thereby reducing the need for excessive tightening and enhancing stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the shoe is tightened to inhibit motion of the foot within the shoe, then stability of the foot within the shoe is improved, but compression of the foot increases causing foot fatigue and discomfort
Solution Approach 1:
The shoe is divided into multiple functional zones with independent support elements. Posts are strategically positioned in the forefoot region to provide localized interstitial support between toes, while the heel counter provides separate rearfoot support. This segmentation allows stability to be achieved through distributed support rather than uniform compression across the entire foot.
Solution Approach 2:
Different regions of the shoe are designed with specific support characteristics tailored to local needs. The forefoot region features flexible posts that engage between toes to prevent medial-lateral motion, while the heel counter provides rigid rearfoot stabilization. This localized quality approach provides necessary stability without applying excessive compression to areas where it is not needed.
2Stability of the object's composition
If the encasement of the shoe is tightened over and around the foot, then motion of the foot within the shoe is inhibited, but circulation in the foot is constricted
Solution Approach 1:
The support function is segmented into discrete elements (posts and heel counter) rather than relying on continuous encasement compression. The posts are positioned to engage only where needed (between toes) to prevent motion, leaving other areas of the foot uncompressed and circulation-unrestricted.
Solution Approach 2:
The posts act as intermediary elements that mediate between the foot and the shoe encasement. Instead of the encasement directly compressing the foot to prevent motion, the posts interpose themselves in the gaps between toes to provide support, thereby preventing motion without requiring tight encasement that would constrict circulation.
3Device complexity
If forces are borne solely by the exterior encasement of the shoe, then shoe construction is simplified, but shoe failure occurs due to concentrated and extreme forces
Solution Approach 1:
The load-bearing function is segmented from the exterior encasement and assigned to internal structural elements (posts and heel counter). The posts are positioned to intercept and distribute forces before they reach the encasement, particularly at stress concentration points like the lateral junction between upper and sole. This segmentation protects the encasement from extreme forces while maintaining relatively simple construction.
Solution Approach 2:
The posts are positioned in advance (before forces are applied) in strategic locations where forces are likely to concentrate (between toes, at the lateral junction area). This beforehand positioning allows the posts to intercept and distribute forces before they can concentrate and cause failure in the encasement, thereby improving durability without complicating the overall shoe construction.
4Ease of operation
If the foot moves distally within the shoe, then flexibility of the foot is improved, but forces become concentrated at specific points leading to shoe failure
Solution Approach 1:
The posts serve as intermediary elements that engage between the foot and shoe structure during distal foot movement. As the foot moves forward and toes contact the posts, the posts mediate the force transmission, distributing loads across multiple contact points (different posts engaged by different toes) rather than concentrating forces at single points in the encasement.
Data Source
AI summary
A shoe with an interstitial (e.g., between the toes) support for the user's foot that provides improved stability to the user's foot. The internal toe-reliant support includes two to four posts that extend into the gaps between toes in the foot and are positioned proximate the vertices or posterior ends of the gaps. The posts inhibit or limit motion of the foot within the shoe, such as when initiating or terminating a motion in a medial, lateral or forward direction (e.g., while walking, hiking or running on level ground or downhill), or when initiating or terminating a clockwise or counterclockwise pivoting motion about the toe portion of the shoe.