Multi-Layer Shoe Insert for Adjustable Sizing
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Solution Overview
Problem
Footwear sizing inconsistencies due to varying manufacturing standards, individual foot uniqueness, weight changes, and growth in children and teens require an adjustable solution to ensure proper fit.
Innovation Solution
A shoe insert comprising multiple layers of varying materials, each with a thickness, length, and height, that can be affixed to the front wall of a shoe to reduce internal length and optionally width, allowing for customizable sizing without vertically cramping the foot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple layers are used to adjust shoe size, then sizing adaptability is improved, but device complexity increases
Solution Approach 1:
The shoe insert is divided into multiple removable layers of different thicknesses. Each layer can be independently removed or retained to adjust the total thickness and accommodate different foot sizes. This segmentation allows the single insert device to serve multiple sizing functions without requiring multiple separate inserts.
Solution Approach 2:
The layers are designed to be dynamically removable and reconfigurable. Users can adjust the number of layers based on their specific sizing needs, transforming a static single-thickness insert into a dynamic multi-thickness system that adapts to different foot sizes and shapes.
2Adaptability or versatility
If layers are removed to achieve proper fit, then adaptability is improved, but ease of operation deteriorates
Solution Approach 1:
The insert is segmented into multiple layers with perforations that facilitate easy separation. Each layer can be individually removed through the perforations without requiring complex tools or procedures, making the size adjustment process simple and user-friendly.
Solution Approach 2:
Perforations act as intermediaries between the layers, providing predetermined weak points that allow easy separation. These perforations serve as mechanical mediators that reduce the force and complexity required to remove layers, enabling users to adjust sizing without difficulty.
3Length of stationary object
If shoe size is reduced by adding insert, then internal length is reduced, but toe space is reduced
Solution Approach 1:
The insert layers are positioned specifically in the heel and midfoot areas of the shoe, leaving the toe area clear. This local placement reduces the internal length where needed for sizing adjustment while preserving adequate toe space and preventing cramping. The insert does not extend into the toe box area.
Solution Approach 2:
Instead of reducing shoe size by shortening the overall length uniformly, the insert achieves size reduction by adding thickness in the vertical dimension at the heel area. This dimensional approach allows internal length adjustment without compromising the horizontal toe space.
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 shoe insert effectively adjusts shoe size to match the wearer's foot, accommodating size variations and growth, while maintaining comfort and avoiding vertical cramping, thus providing a flexible and comfortable fit across different footwear types.
Implementation Method 1
An adhesive coating is on a surface of the layer for holding the layer to the front wall of the target shoe
Data Source
AI summary
A toe engaging apparatus or shoe insert includes one or more layers. Each layer is removably held to a neighboring planar layer. Each of the layers have a thickness, a longitudinal length, and a height; the height being such that the layers fits against a front wall of a target shoe. The layers are sized and shaped such that when affixed to the front wall area of the target shoe, the layers reduce the internal length of the target shoe, thereby effectively decreasing the size of the target shoe. The toe engaging apparatus optionally includes a mechanism for holding the plurality of layers against the front wall of the target shoe.