Biased Hinge Support for Knee Joint Asymmetry
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Solution Overview
Problem
Current unloader braces for hinge joints, such as the knee, are inadequate in providing effective support and stability, often leading to joint fatigue, pain, and instability due to insufficient pressure distribution and alignment issues.
Innovation Solution
A flexible, elastically stretchable framework with an integrally molded network of interconnected elastomeric segments and a structural hinge mechanism that applies asymmetric pressure across the hinge joint, featuring a larger structural hinge mechanism to bias pressure towards one side, enhancing support and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a traditional unloader brace is used to apply pressure to the knee, then joint support is provided, but the pressure distribution is insufficient and does not effectively address joint fatigue, pain, and instability
Solution Approach 1:
The framework applies different pressure characteristics to different regions of the hinge joint through its asymmetric design. The larger structural hinge mechanism on one side creates concentrated pressure on that side, while the smaller secondary hinge mechanism creates different pressure patterns on the opposite side. This localized pressure distribution directly addresses joint fatigue, pain, and instability in specific areas rather than applying uniform pressure throughout.
Solution Approach 2:
The support device employs asymmetric hinge mechanisms where the structural hinge mechanism is deliberately made larger than the secondary hinge mechanism. This asymmetry creates biased pressure application towards one side of the hinge joint, allowing the device to address specific alignment issues and joint conditions that require directional pressure rather than symmetric treatment.
2Stability of the object's composition
If a rigid support structure is used to provide stability, then joint alignment is improved, but the device cannot adapt to the body's shape and contour
Solution Approach 1:
The framework is constructed from flexible, elastically stretchable material that can conform to the body's shape and contour while maintaining structural integrity. This flexible construction allows the support device to adapt to individual anatomical variations and ensure proper contact and pressure distribution across the hinge joint, unlike rigid structures that cannot accommodate body contours.
Solution Approach 2:
The framework's flexible nature allows it to dynamically adjust its shape and pressure distribution based on the body's contours and the user's movement. The elastically stretchable material enables the device to maintain optimal contact and alignment during various positions and motions, providing both stability and adaptability.
3Adaptability or versatility
If a flexible framework is used to conform to the body, then adaptability is improved, but the structural support and pressure application may be insufficient
Solution Approach 1:
The framework combines flexible elastomeric material with rigid hinge mechanism components to create a composite structure. The flexible framework material provides conformability to the body shape, while the integrated rigid hinge mechanisms (structural and secondary) provide the necessary structural support and pressure application capability. This composite approach resolves the contradiction between flexibility and strength.
4Stability of the object's composition
If symmetric hinge mechanisms are used, then balanced support is provided, but the device cannot dynamically bias the joint for enhanced extension and flexion
Solution Approach 1:
The support device employs asymmetric hinge mechanisms where the structural hinge mechanism is deliberately made larger than the secondary hinge mechanism. This asymmetry creates biased pressure application towards one side of the hinge joint, allowing the device to address specific alignment issues and joint conditions that require directional pressure rather than symmetric treatment.
Solution Approach 2:
The hinge mechanisms are designed to be dynamic rather than static, allowing them to adapt to the user's movement and provide biased support during different phases of motion. The larger structural hinge mechanism can dynamically adjust to enhance extension or flexion based on the user's needs, providing active motion enhancement rather than passive symmetric support.
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 solution provides improved joint stability and reduced fatigue by conforming to the body's shape, dynamically biasing the joint for enhanced extension and flexion, while storing and releasing potential energy for kinetic assistance during movement.
Implementation Method 1
a flexible, elastically stretchable framework configured to extend across the hinge joint of the area of the body when the support is secured to the area of the body
Implementation Method 2
The structural hinge mechanism is larger than the secondary hinge mechanism so as to bias the application of pressure towards one side of the hinge joint when the support is secured to the area of the body
Data Source
AI summary
A support for an area of a body that includes a hinge joint includes a flexible, elastically stretchable framework comprising an integrally molded network of interconnected, elastomeric segments defining a plurality of permanent openings; a structural hinge mechanism affixed to a first side of the framework, and a secondary hinge mechanism affixed to a second side of the framework. The structural hinge mechanism is larger than the secondary hinge mechanism so as to bias the application of pressure towards one side of the hinge joint when the support is secured to the area of the body. The elastomeric segments of the framework are designed in such a way as to asymmetrically assert pressure on the hinge joint when the support is secured to the area of the body. The structural hinge mechanism and the framework work together to bias application of pressure generally in the same direction.