Interlocking Fastener for Interchangeable Modular Shoe Footbeds

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Solution Overview

Problem

Conventional footwear requires multiple pairs for different activities or conditions, leading to increased costs, storage space consumption, and material waste, with conventional insoles being unsuitable for open-back shoes and lacking adaptability.

Innovation Solution

A modular shoe system with interchangeable footbeds using interlocking elements that securely attach to the shoe base, allowing quick and easy adaptation to various activities, conditions, and aesthetic preferences.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple pairs of specialized shoes are purchased for different activities, then performance features for each activity are improved, but costs and storage space consumption increase

Engineering Contradiction:

Improveactivity-specific performanceVSAvoidnumber of shoe pairs

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The shoe system is divided into separate functional components: a base shoe structure and interchangeable footbeds. Each footbed is specialized for different activities (walking, hiking, running, water sports), allowing the user to segment the functionality into modular units that can be independently selected and swapped based on activity needs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A single base shoe structure is designed to accommodate multiple types of footbeds through a universal attachment mechanism. This multi-functional design allows one shoe pair to perform multiple activities by simply changing the footbed, eliminating the need for multiple specialized shoe pairs.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If conventional insoles are used in open-back footwear, then comfort and support are needed, but conventional insoles fail to stay secured

Engineering Contradiction:

Improveinsole securityVSAvoidinsole retention

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The attachment mechanism is segmented into complementary components: protrusions on the footbed and corresponding recesses on the shoe base. This segmentation allows the insole to be securely retained through mechanical interlocking while maintaining the ability to be easily removed and replaced.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The attachment features utilize curved or rounded geometric forms that facilitate easy insertion and removal while maintaining secure retention. The rounded protrusions and recesses allow for smooth engagement and disengagement of the footbed from the shoe base.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS20250311813A1Interchangeable footbed for footwear and a modular shoe system having an interchangeable footbed

Publication Date: 2025.10.09 CSR DEV LLC

AI summary

A footbed for a modular shoe system, a modular shoe system, and an interlocking fastener system for a footbed or for a modular shoe system, are provided. The interlocking fastener system includes a plurality of interlocking elements on a footbed configured to interlock with a plurality of complementary interlocking elements on a shoe base to releasably secure the footbed to the shoe base.