Expandable Shoe Assembly for Adjustable Foot Thickness
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Solution Overview
Problem
Existing shoes fail to accommodate feet of varying thicknesses due to a lack of expansion mechanisms, particularly for growing children.
Innovation Solution
An expandable shoe design featuring an upper, an outsole, and an expansion strip connected via a connector assembly, allowing the shoe to adapt to different foot thicknesses by expanding the space between the upper and outsole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the upper is directly joined to the outsole, then the shoe structure is simple and stable, but the shoe cannot accommodate feet of different thicknesses
Solution Approach 1:
The shoe structure is divided into three main segments: the upper, the expansion strip, and the outsole. The expansion strip acts as a separate intermediate component that can be inserted or removed to adjust the space between the upper and outsole, allowing the shoe to accommodate different foot thicknesses without requiring a completely different structure for each foot size.
Solution Approach 2:
The connector assembly provides dynamic adjustability by allowing the expansion strip to be inserted or removed based on the foot thickness. This transforms the static shoe structure into a dynamic one that can adapt to different conditions (different foot sizes) while maintaining structural integrity through the standardized connector assembly.
2Adaptability or versatility
If an expansion strip is added to accommodate growing feet, then the shoe can fit different foot sizes, but the shoe structure becomes more complex
Solution Approach 1:
The connector assembly serves multiple functions: it connects the upper to the outsole, provides a mechanism for inserting the expansion strip, and maintains structural integrity. By designing a universal connector assembly that handles both direct connection and expansion strip insertion, the patent reduces the need for separate connection mechanisms for different configurations.
Solution Approach 2:
The expansion strip is designed to be nested within the space between the upper and outsole when not in use. The connector assembly allows the expansion strip to be stored compactly within the shoe structure, minimizing the increase in overall complexity while maintaining the adaptability function.
3Adaptability or versatility
If the upper is removably coupled to the outsole, then the shoe can be adjusted for different foot sizes, but the structural stability is reduced
Solution Approach 1:
The connector assembly is pre-designed and pre-installed on both the upper and outsole, providing a ready-made connection mechanism. This preliminary preparation ensures that when the upper is attached (with or without the expansion strip), the connection is stable and secure, mitigating the potential instability from removable coupling.
Data Source
AI summary
An expandable shoe for expanding to adapt to growing feet includes an outsole, an upper, and an expansion strip. The expansion strip is coupled to a bottom edge of the upper. The upper may be joined to the outsole at the bottom edge of the upper to accommodate a foot of a first size between the upper and the outsole. The expansion strip may be joined to the outsole at a distal edge of the expansion strip with respect to the upper to accommodate a foot of a second size which is larger than the first size. In particular, the expansion strip spaces the upper farther upwardly away from the outsole to accommodate thicker feet. The expandable shoe could be used by a user with growing feet so that the expandable shoe adapts to one of the user's feet as it becomes thicker.