Owl-reach

Project Overview

Owl-Reach is a crutch-mounted accessory system designed to transform standard mobility aids into a hands-free tool station. This system moves essential reaching tools from the user’s hands to a dedicated mounting point on the crutch, allowing for unimpeded travel.

Instead of requiring the user to manage a grabber tool while operating crutches, I developed a universal interface that accommodates various grabber diameters and works with both rectangular wooden and cylindrical metal crutch frames. The goal was to create a lightweight system that preserves the stability of the mobility aid while adding the utility of hands-free tool transport.

Design Focus

• The project is built around a specialized mechanical interface to ensure tools stay exactly where they are placed:

• The Friction-Fit System: A flexible TPU clip that utilizes material tension to accommodate various grabber sizes. This ensures the tool remains stable and perfectly aligned during movement.

• Universal Interface: A non-destructive clip designed to provide high clamping force without damaging the crutch material. The wing-shaped geometry allows for optional elastic-tensioner reinforcement for smaller diameter frames.

• Material Synergy: By utilizing high-performance TPU, the system achieves a secure, "rubbery" grip that remains easy to adjust during operation.

The Assembly System

To achieve an optimal balance of flexibility and grip, the system utilizes TPU 95A for both primary components:

• The Branch Base: The flexible crutch interface. The compliant geometry allows the base to wrap around various frame sizes and materials. The wing-shaped design serves as a mounting point for additional tensioners if a tighter fit is required.

• The Owl Clip: The flexible tool holder. The internal diameter and material friction prevent the grabber from slipping, accommodating different tool brands without the need for individual modifications.

Functional Breakthrough

The Wing-Shaped Geometry was the turning point for this project. By engineering specific flex points into the TPU components, I was able to create a mount that remains stable during movement yet accommodates a wide range of hardware. The optional tensioner reinforcement under the wings transforms the fit from "sliding" to "locked" without the need for tools or permanent modifications to the crutch.

Reflection & Tools

• Key Lesson: The primary goal was to design a cross-compatible solution for various underarm crutch styles. This established a scalable foundation that can be adapted for forearm-style aids in future iterations.

• CAD: Plasticity | 3D Printing: Prusa CORE One | Slicing: PrusaSlicer

Disclaimer & Safety

Not a Medical Device: Owl-Reach is an experimental ergonomic prototype. It has NOT been evaluated, approved, or endorsed by any medical or regulatory body (such as Health Canada or the FDA). It is not intended to treat, cure, or manage any medical condition

Safety Caution: Always ensure the accessory and the tool are securely attached before travel. An unsecured tool could interfere with gait or create a trip hazard. Consult with a healthcare professional to ensure this accessory is appropriate for your specific needs.

User is the Manufacturer: By downloading these files, the user acknowledges they are the manufacturer of the physical object and assume 100% responsibility for material selection, print settings, and safety testing.

Evolution of the Design