Zero-Drop Shoe Structure With Asymmetric Wide Toe Box
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shoes cause foot pain, injuries, and mobility issues due to elevated heels and narrow toe boxes, leading to improper foot alignment and pressure on the toes.
Innovation Solution
Ergonomic shoes with a zero drop heel and wide toe box design that mimics the natural shape of the foot, maintaining equal elevation from heel to ball of the foot and avoiding inward toe compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If an elevated shoe heel is used, then the shoe provides heel elevation, but it causes foot pain, knee problems, hip problems, and back problems due to improper body alignment
Solution Approach 1:
The patent changes the heel elevation parameter from elevated to zero drop, where the heel and ball of the foot are at the same elevation. This parameter change eliminates the need for body compensation adjustments, thereby preventing foot pain, knee problems, hip problems, and back problems while maintaining a conventional shoe appearance through design features like a thicker front sole and curved sole design.
2Ease of manufacture
If a narrow toe box is used, then the shoe fits conventional dress shoe standards, but it squeezes the toes and causes bunions and mobility issues
Solution Approach 1:
The patent applies asymmetry by designing the toe box with different curvature radii for the inside and outside of the foot. The inside curve radius is larger than the outside curve radius, creating a wider toe box that accommodates the natural asymmetrical shape of the human foot. This prevents toe squeezing and bunion formation while maintaining conventional dress shoe appearance through controlled curvatures that swoop gradually at the front.
Data Source
AI summary
A shoe having a zero drop heel and ergonomic toe box and a form for making the shoe. A sole defines a ball contact area and a heel contact area. Sole thickness may be greater at the ball contact area. A sole drop area adjacent to a heel front side accommodates a foot received in a sink of the heel formed in a heel top surface. A portion of sole inside surface between an inside joint line and a toe-end is parallel to a longitudinal axis for facilitating accommodation of a wearer's big toe. A ball contacting surface and a heel contacting surface support a wearer's foot. The contacting surfaces are the same as or adjacent to a sole upper surface. Distance between ball contacting surface and sole lower surface is approximately equal to distance between heel contacting surface and heel bottom surface, which facilitates “zero drop”.