Modular Footwear Sole Structure With Tool-Free Outsole Swapping

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Solution Overview

Problem

Existing footwear sole structures lack modularity and customization options, limiting the ability to easily replace or swap outsoles for different characteristics, functionalities, or aesthetics without the use of external tools.

Innovation Solution

A sole structure design that allows for removable and interchangeable outsoles, featuring a midsole with a rail and cavity system that enables secure coupling and decoupling of outsoles without external equipment, enabling users to customize footwear by swapping outsoles for various purposes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the outsole is made as a single integrated unit with the midsole, then the structural strength and stability are improved, but the ability to replace or customize outsoles is lost

Engineering Contradiction:

Improveoutsole replacement capabilityVSAvoidsole structure integrity

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The sole structure is divided into separate components: a midsole and a removable outsole. The outsole can be detached and replaced independently from the midsole, enabling customization and replacement while maintaining the integrity of the overall structure through the engagement features that connect the two parts.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the outsole is made removable and interchangeable, then the customization options are improved, but the device complexity increases

Engineering Contradiction:

Improveoutsole interchangeabilityVSAvoidsole structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The outsole is designed as a separate removable component from the midsole, allowing it to be easily detached and replaced. This segmentation enables users to interchange outsoles for different functionalities or aesthetics without complicating the overall footwear structure, as the separation is achieved through simple engagement features.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The engagement features between the midsole and outsole are designed to be universal, allowing the same midsole to accommodate multiple different outsole configurations. This multi-functionality enables a single footwear base to support various outsole options for different purposes without increasing structural complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Strength

If the outsole replacement mechanism uses external tools, then the secure coupling is improved, but the ease of operation deteriorates

Engineering Contradiction:

Improveoutsole coupling securityVSAvoidoutsole replacement ease

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The engagement features are designed to enable users to attach and detach outsoles without requiring external tools. The self-service mechanism allows the outsole to be securely coupled to the midsole through simple manual operations, combining ease of operation with adequate coupling security for the intended application.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12458106B2Article of footwear including a sole structure

Publication Date: 2025.11.04 CONVERSE INC

AI summary

A sole structure for an article of footwear having a midsole having a support surface extending from a posterior end to an anterior end, the midsole having an outer surface and an inner surface, wherein the support surface and the inner surface surround a cavity, the midsole also including an inner rail extending along the inner surface and into the cavity, wherein the rail and the cavity are configured to engage with a removable outsole.