Design and Analysis of a Mechanical Wrist and Finger Stabilization Device for Tremor Patients

This project is deeply personal and close to my heart, as it was inspired by my wife’s journey following her stroke. Watching her battle the challenges of tremors, struggling with tasks that once came effortlessly, has been motivating. This orthosis is my attempt to bring a sense of ease and independence back into her life, and by extension, to others facing similar struggles. It’s not just a mechanical device; it’s a symbol of resilience, love, and the determination to make everyday life a little brighter for those who are in need. This is a project in progress, I will update the website as time goes on.

Project Goals

Develop a lightweight, modular, user-friendly device to be 3D printed.

Integrate simple locking mechanisms for wrist and finger stability.

Leverage Finite Element Analysis (FEA) to ensure the device's structural integrity and optimize performance.

Key Features

Custom Fit:

Accurate hand geometry captured through 3D scanning ensures precise customization.

Wrist Stabilization:

A secure locking mechanism provides reliable wrist support.

Finger Locking System:

Manual locks for the pinky and ring fingers enhance grip control and stability.

Modularity:

Snap-fit and toggle-latch mechanisms allow easy assembly, disassembly, and customization.

Development Process

3D Scanning:

Import and clean up hand geometry to create precise digital models.

CAD Design:

Modular wrist and finger assemblies designed for ease of use.

FEA Optimization:

Stress and performance simulations guide material selection and structural enhancements.

Prototyping:

Components 3D-printed using biocompatible materials for functional testing.

Testing & Iteration:

Locking mechanisms and fit tested for user comfort and functionality. Design iterated based on feedback.

Background

Tremor patients struggle with daily tasks, impacting independence and quality of life. While current solutions like soft robotics and gyroscopic systems exist, they can be cumbersome and expensive. A mechanical device offers a simpler, more cost-effective alternative with an emphasis on user customization.

Planned Analysis and Results

FEA Insights:

Evaluated stress distribution and identified critical areas for improvement.

Optimized material selection, component thickness, and overall structure.

Testing Outcomes:

Physical testing ensured functionality and user comfort, guiding iterative enhancements.

Future Directions

Explore advanced materials to further reduce weight and improve durability.

Extend modularity to accommodate broader usability across patient needs.

Investigate hybrid solutions integrating active stabilization or soft robotics.