Expandable Shoe With Elastic Members For Variable Fit
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Solution Overview
Problem
Commercially available shoes often fail to provide a perfect fit due to variations in foot length and width, and children's feet grow rapidly, necessitating frequent size changes, making it difficult for parents to find suitable shoes.
Innovation Solution
The design incorporates expandable elastic members at strategic locations in the shoe, allowing it to stretch in length, width, and height, with adjustable heels and interlocking surfaces to accommodate varying foot sizes, enabling the shoe to fit comfortably and securely across a range of sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shoes are made in numerous fixed sizes to accommodate different foot dimensions, then manufacturing precision and fit quality improve, but device complexity and inventory requirements increase
Solution Approach 1:
The shoe incorporates elastic members that allow the shoe structure to dynamically adjust and expand to accommodate different foot sizes. The elastic members enable the shoe to stretch and conform to the wearer's foot, providing a customized fit without requiring multiple fixed-size shoe models.
Solution Approach 2:
The invention changes the physical state of the shoe structure by introducing expandable elastic components. These elastic members allow the shoe to transition between different size states, enabling a single shoe design to fit multiple foot dimensions by altering the structural parameters through elastic deformation.
2Reliability
If shoes are made with fixed structure to maintain stability and support, then reliability improves, but adaptability to different foot sizes decreases
Solution Approach 1:
The shoe is divided into fixed structural components and expandable elastic components. The fixed portions maintain stability and support functions, while the elastic members provide adaptability. This segmentation allows different parts of the shoe to serve different functions simultaneously.
Solution Approach 2:
The shoe combines rigid materials for structural support with elastic materials for size accommodation. This composite construction integrates materials with different mechanical properties, allowing the shoe to simultaneously provide stability through rigid components and adaptability through elastic components.
3Adaptability or versatility
If multiple shoe sizes are produced to fit growing children's feet, then adaptability improves, but loss of time and frequency of replacement increase
Solution Approach 1:
The shoe design achieves multi-functionality by enabling a single shoe model to serve multiple size requirements. The expandable elastic members allow the shoe to accommodate growing feet across a range of sizes, making one shoe design universal for different age groups and foot dimensions, thereby reducing replacement frequency.
4Adaptability or versatility
If elastic members are added to enable expansion, then adaptability improves, but device complexity increases
Solution Approach 1:
The invention uses elastic members as flexible structural elements that integrate into the shoe's upper construction. These elastic components are woven or knitted into the shoe material, creating a flexible yet structurally sound design that maintains aesthetic appearance while providing expandability functionality.
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
This solution allows a single size of shoe to fit a significant range of foot sizes, providing a comfortable and secure fit for both adults and children, accommodating growth and swelling, while maintaining stability and support.
Implementation Method 1
The first elastic member is stretchable to allow the shoe to move in the length, width or height directions in response to the size of the foot
Implementation Method 2
The second elastic member is stretchable to allow the rear of the shoe to move in the width or length direction in response to the size of the foot
Data Source
AI summary
An expandable shoe has a top portion, a pair of side portions, a back portion, a sole, a heel and a first elastic member. The first elastic member joins the top portion to the pair of side portions at a critical location which is at the junction of the top portion and the side portions. The first elastic member is in the shape of an inverted “U” extending along the front of the shoe. The expandable shoe may further have a second elastic member joining the back portion to the side portions at the critical locations at the junctions of the back and side portions and the junctions of the back and the rear of the sole. The second elastic member is in the shape of an upright “U”.