Adjustable Heel Curtain for Dynamic Shoe Sizing
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Solution Overview
Problem
The footwear industry faces challenges such as costly returns due to incorrect fits, inventory requirements for half sizes and specific widths, changing foot morphology, and dynamic footwear needs across various activities, which existing shoes fail to address effectively.
Innovation Solution
A size adjustable shoe featuring a transformable heel curtain that can shift between two positions, allowing the shoe size to be adjusted by altering the inner dimensions, thereby accommodating different foot sizes and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional fixed-size shoes are used, then manufacturing and inventory management are simple, but fit accuracy deteriorates and returns increase
Solution Approach 1:
The heel curtain is designed to be movable between multiple positions (first position adjacent to inner surface, second position adjacent to outer surface) allowing the shoe to dynamically adjust its size. This dynamic adjustment mechanism enables the shoe to adapt to different foot sizes without requiring multiple fixed shoe sizes in inventory, thereby improving fit accuracy while managing the complexity through a single adjustable structure rather than multiple fixed designs
Solution Approach 2:
The shoe size parameter is made variable through the heel curtain positioning system. By changing the position of the heel curtain between first and second positions, the effective inner dimension of the shoe changes, allowing the same shoe to accommodate different foot sizes. This parameter change approach eliminates the need for multiple fixed-size inventories while maintaining precise fit adjustment capability
2Manufacturing precision
If multiple sizes and widths are produced to accommodate different feet, then fit accuracy improves, but inventory requirements and costs increase
Solution Approach 1:
A single shoe design with the adjustable heel curtain serves multiple size functions. The heel curtain can be positioned in different locations to create various inner dimensions, allowing one shoe model to accommodate different foot sizes and widths. This multi-functionality eliminates the need to produce and maintain inventory of multiple size variants, reducing inventory quantity while preserving fit accuracy across different users
Solution Approach 2:
The shoe transitions from a static fixed-size design to a dynamic adjustable-size design. The movable heel curtain enables the shoe to change its effective size parameter during use or between uses, allowing a single inventory item to serve multiple size needs. This dynamic approach replaces the static strategy of producing multiple fixed sizes, thereby reducing overall inventory quantity while maintaining universal fit accuracy
3Adaptability or versatility
If shoes are made for adult sizes only, then manufacturing simplicity is maintained, but adaptability to changing foot morphology deteriorates
Solution Approach 1:
The heel curtain adjustment mechanism enables the shoe to adapt to changing foot morphology throughout a user's life. The curtain can be repositioned to accommodate growth, weight changes, or other morphological variations without requiring the user to purchase new shoes. This dynamic adaptability is achieved through a relatively simple repositioning mechanism rather than complex transformation systems, maintaining versatility while controlling complexity
Solution Approach 2:
The shoe's effective size parameter is made changeable through the heel curtain positioning system. Users can adjust the inner dimension parameter by repositioning the curtain, allowing the same shoe to adapt to different foot sizes and shapes over time. This parameter change capability provides long-term adaptability to changing foot morphology without requiring multiple different shoe designs or complex adjustment mechanisms
Data Source
AI summary
A size adjustable shoe having a heel curtain that is transformable, for example by folding, between a first position and a second position such that the size of the shoe is smaller when the heel curtain is in the first position than when it is in the second position.