Modular Footwear Assembly for Replaceable and Recyclable Parts
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Solution Overview
Problem
Conventional athletic footwear lacks modular and recyclable components, limiting personalization, customization, and sustainability options.
Innovation Solution
Articles of footwear with removable and interchangeable components, such as exterior sole and midsole parts, allowing for adhesive-free assembly and recyclability, formed from single materials or recycled materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional athletic footwear uses integrated construction methods, then structural strength and durability are improved, but adaptability and recyclability deteriorate
Solution Approach 1:
The footwear is divided into distinct modular components including upper, midsole, outsole, and tongue sections that can be separately attached and detached. Each component maintains structural integrity through optimized connection interfaces while enabling easy interchangeability for different sports and preferences.
Solution Approach 2:
The footwear system incorporates universal connection mechanisms that work across all components, allowing a single upper to accommodate multiple sole configurations and vice versa. This multi-functional design enables the same basic structure to serve different athletic purposes through component substitution.
2Reliability
If conventional footwear uses permanent bonding methods, then reliability of connection is improved, but ease of repair and recyclability worsen
Solution Approach 1:
The connection system transitions from static permanent bonding to dynamic reversible connections. Mechanical fasteners and magnetic attachments allow the footwear components to be repeatedly assembled and disassembled while maintaining secure connection during use, enabling both reliability and ease of repair.
Solution Approach 2:
The modular design facilitates easy separation of worn or damaged components from functional ones. Users can replace only the affected parts (such as swapping a worn outsole while retaining a functional upper) rather than discarding the entire footwear, thereby improving repairability and reducing waste.
3Reliability
If footwear components are made from multiple materials, then functional performance is improved, but recyclability deteriorates
Solution Approach 1:
Different footwear components are constructed from materials optimized for their specific functional requirements (such as cushioning foam for midsole, abrasion-resistant rubber for outsole, breathable fabric for upper). Each component maintains its material-specific properties while the modular design enables separate recycling of each material type according to its composition.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
Articles of footwear (100, 900) include: an upper component (200), a midsole component (300), and, optionally, an exterior sole component (400). A first side (200L, 200M) of the upper component (200) defines a first plurality of openings (206RHL, 206RHM, 206FHL, 206FHM, 206ML, 206MM, 206FL, 206FM, 206FTL, 206FTM, 208BH, 208BM, 208BF) extending through a material of the upper component (200). The first plurality of openings (206RHL, 206RHM, 206FHL, 206FHM, 206ML, 206MM, 206FL, 206FM, 206FTL, 206FTM, 208BH, 208BM, 208BF) includes at least: (i) a first opening and (ii) a second opening separated from the first opening by a first strip of upper component (200) material. The upper component (200) at least partially defines an interior chamber (202) configured to receive a wearer's foot. The midsole component (300) is received in the interior chamber (202) of the upper component (200). The midsole component (300) includes a plurality of protrusions (306RHL, 306RHM, 306FHL, 306FHM, 306ML, 306MM, 306FL, 306FM, 306FTL, 306FTM, 308BH, 308BM, 308BF). The plurality of protrusions (306RHL, 306RHM, 306FHL, 306FHM, 306ML, 306MM, 306FL, 306FM, 306FTL, 306FTM, 308BH, 308BM, 308BF) includes at least (i) a first protrusion extending through the first opening and (ii) a second protrusion extending through the second opening, wherein the first strip of upper component (200) material covers a first portion of the midsole component (300) located in a first recess (304) between the first protrusion and the second protrusion. The exterior sole component (400), when present, may be engaged with the midsole component (300). Specifically, the exterior sole component (400) may include a second plurality of openings (406RHL, 406RHM, 406FHL, 406FHM, 406ML, 406MM, 406FTL, 406FTM) extending through a material of the exterior sole component (400). This second plurality of openings (406RHL, 406RHM, 406FHL, 406FHM, 406ML, 406MM, 406FTL, 406FTM) includes at least: (i) a third opening, wherein the first protrusion extends through the third opening and (ii) a fourth opening separated from the third opening by a first strip (404) of exterior sole component (400) material, wherein the second protrusion extends through the fourth opening and the first strip (404) of exterior sole component (400) material at least partially covers the first strip of upper component (200) material.