Reflective Heel Strip in Footwear Outsole
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing footwear with reflective patches on the heel area is often obscured by the pant leg, dirt, or abrasion, rendering them less visible and effective for public safety personnel.
Innovation Solution
A reflective strip is positioned low on the outsole, inside the heel counter, and protected by a transparent window or material, ensuring visibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If reflective patches are placed on the upper heel area, then visibility is improved for public safety personnel, but the patches are obscured by pant legs and dirt
Solution Approach 1:
The reflective element is moved from the vertical dimension (upper heel counter) to the horizontal dimension (lower outsole heel area). This dimensional relocation positions the reflective strip below the pant leg coverage zone while maintaining heel visibility, allowing it to be seen through the outsole window cutouts without being obscured by clothing or dirt on the upper heel.
2Illumination intensity
If reflective patches are placed on the outside of the footwear, then visibility is enhanced, but they are obscured by dirt and abrasion
Solution Approach 1:
The reflective strip is nested within the heel counter structure, specifically positioned in a recessed area or window cutout of the outsole. This nesting protects the reflective element from direct exposure to dirt and abrasion while maintaining visibility through the transparent or translucent outsole material, ensuring long-term reliability.
Solution Approach 2:
The outsole material acts as an intermediary between the reflective strip and the external environment. The outsole's transparent or translucent properties allow light to pass through to the reflective strip while physically protecting it from dirt and wear, serving as a protective barrier that maintains both visibility and durability.
3Illumination intensity
If reflective patches are placed high on the heel counter, then they are visible, but they are inadvertently covered by pant legs
Solution Approach 1:
The reflective element is repositioned from the vertical upper heel counter to the lower outsole heel area. This spatial relocation ensures the reflective strip remains below the typical pant leg hemline, maintaining visibility through the outsole window cutouts while avoiding coverage by clothing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The reflective strip remains visible and protected from environmental factors, enhancing the visibility of public safety personnel without being covered by pant legs or obscured by dirt.
Implementation Method 1
The reflective strip is an elongated strip of reflective material attached generally horizontally to the outside of the footbed heel cup
Implementation Method 2
The reflective properties are typically obtained from retroreflective glass beads or prismatic material
Data Source
AI summary
Footwear with a reflective strip low on the heel and visible through the outsole. The reflective strip is a strip of reflective material attached horizontally to the back and, optionally, the lateral side of the footbed heel cup, positioned low on the heel cup. Optionally, the reflective strip fits into a depression in the heel cup. The reflective strip is attached to the heel cup either permanently or removably. The outsole heel and lateral side has one or more window cutouts through which the reflective strip is visible. The reflective strip is visible through the heel counter because the heel counter is either transparent, with or without raised sections filling the outsole window cutouts or has a cutout with an optional sheet of transparent protective material outside of the heel counter.