Interchangeable Midsole System with Projection-Aperture Attachment

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Solution Overview

Problem

Athletic shoes lack the ability to easily switch midsole portions for different activities, limiting customization of feel and performance.

Innovation Solution

A shoe design with interchangeable midsole portions, featuring projections that engage with apertures in the outsole for secure attachment, allowing users to choose from various midsole structures with different materials and features for specific activities, such as gel, foam, or carbon fiber, to optimize performance and comfort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the midsole is fixedly secured to the outsole using gluing or similar attachment processes, then the structural integrity of the shoe is maintained, but the ability to easily replace the midsole for different activities is lost

Engineering Contradiction:

Improveability to replace midsoleVSAvoidattachment process complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The shoe is divided into separable components: the outsole with aperture array, the midsole with projection array, and the upper portion. The midsole can be independently removed and replaced by detaching projections from apertures, enabling different midsoles to be swapped for different activities while maintaining structural integrity through the engagement mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The attachment system transitions from a static fixed state to a dynamic removable state. Projections extend from the midsole and can be inserted into or removed from apertures in the outsole, allowing the midsole to be dynamically reconfigured based on activity requirements while maintaining secure attachment during use.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the midsole is made thicker under the heel for cushioning, then comfort is improved, but the ability to customize for different sport types is limited

Engineering Contradiction:

Improvecustomization for sport typeVSAvoidmidsole thickness configuration

Core Design Contradiction:

Adaptability or versatilityVSShape

Solution Approach 1:

Different midsoles can be designed with varying local characteristics including thickness under the heel, material composition, and structural features. Users can select midsoles with specific thickness configurations and material properties (gel, foam, carbon fiber) matched to specific sport requirements, allowing customization of cushioning and support for different activities.

Inventive Principle:

Principle #3Local quality

3Strength

If projections extend through apertures to secure the midsole, then the midsole attachment is strengthened, but the alignment precision requirement increases

Engineering Contradiction:

Improvemidsole attachment strengthVSAvoidalignment precision

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The projection-aperture system serves multiple functions: it provides mechanical attachment strength, ensures proper alignment during installation, and allows for easy removal and reinstallation. The standardized projection and aperture design enables universal compatibility across different midsole and outsole configurations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8205357B2Interchangeable midsole system

Publication Date: 2012.06.26 K SWISS INC

AI summary

Exemplary embodiments of the invention provide a shoe assembly having at least an outsole portion and a midsole portion, the midsole portion is removably engaged with the outsole to allow replacement of the midsole with another midsole having different structural features, and at least one projection extends from the midsole through an aperture of the outsole, the projection configured to engage with a corresponding aperture of the outsole to align and secure the midsole to the outsole.