3D Foot Motion Control Insole for Plantar Pressure Redistribution
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Solution Overview
Problem
Current arch supportive insoles fail to effectively address the abnormal motions and plantar pressures associated with flat feet and pes cavus, leading to long-term musculoskeletal damage and discomfort during walking or running, as they do not adequately modify the subtalar joint motions and redistribute pressures across the foot.
Innovation Solution
A three-dimensional foot motion control device with an arch support body that adjusts heel strike angles and plantar pressures by extending hindfoot motion adjustment portions to the calcaneus, incorporating a rigid reinforcement portion, and being designed to support the medial, transverse, and lateral longitudinal arches, made from materials like plastics, glass fibers, or metals, to control excessive pronation and supination angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional arch supportive insoles are used, then basic arch support is provided, but they fail to effectively control subtalar joint motions and redistribute plantar pressures
Solution Approach 1:
The insole is divided into multiple functional zones: a rigid reinforcement portion for structural support, an arch support body for longitudinal arch support, and hindfoot motion adjustment portions for subtalar joint control. Each segment performs a specific function to collectively address flat foot pathology without requiring a completely complex device structure.
Solution Approach 2:
Different regions of the insole have different rigidity and support characteristics. The rigid reinforcement portion provides localized structural support, while the arch support body provides distributed support across the longitudinal arch. The hindfoot motion adjustment portions provide targeted control at the heel region, creating local quality variations that address specific pathological issues.
2Reliability
If the insole structure is enhanced to better control foot motion, then motion control effectiveness improves, but the thickness and shoe interior space occupation increases
Solution Approach 1:
Instead of using a uniformly thick insole, the design segments the support structure into thin, targeted components. The rigid reinforcement portion, arch support body, and hindfoot motion adjustment portions are strategically positioned to provide maximum control with minimal overall thickness, preserving shoe interior space while maintaining effectiveness.
3Reliability
If the insole provides comprehensive arch support, then plantar pressure distribution improves, but it occupies more shoe interior space
Solution Approach 1:
The insole provides pressure distribution through localized support zones rather than uniform coverage. The rigid reinforcement portion, arch support body, and hindfoot motion adjustment portions create specific pressure redistribution zones that address pathological pressure points without requiring the insole to cover the entire foot surface, thus minimizing occupied area.
Data Source
AI summary
A device for three-dimensional foot motion control and plantar pressure redistribution, for controlling relative motions of foot joints effectively by modifying heel strike angles and adjusting relative plantar pressures of a foot is disclosed. It includes an arch supporting main body, for supporting medial longitudinal arch, transverse arch and lateral longitudinal arch of the foot, a rear end having at least one lateral side extending corresponding to the location of calcaneus of the foot; wherein the arch supporting main body is a three-dimensional structure formed by curvatures of the medial longitudinal arch, the transverse arch and the lateral longitudinal arch collaboratively, and a hindfoot motion adjustment portion for modifying heel strike angles.