Fabrication Steps
1. Design and Cutting the Aluminum Tubes
Main Frame Sections:
Cut the aluminum tubes into the following lengths:
Upper Section: 40–50 cm (armpit to midsection).
Lower Section: 40–50 cm (midsection to ground).
Ensure the tubes for the lower section are telescoping (slightly smaller diameter to slide into the upper section).
Horizontal Support:
Cut an aluminum tube (~20 cm) for the horizontal support connecting the mainframe.
Folding Mechanism Section:
Cut a shorter section (~10 cm) for the foldable hinge component.

2. Create the Folding Mechanism
Hinge Assembly:
Weld or fasten a hinge joint at the connection between the upper and lower mainframe sections.
Ensure the hinge allows for smooth folding and unfolding, with alignment locks.
Locking Mechanism:
Install detent buttons in pre-drilled holes at the folding joint to secure the crutch when fully extended.

3. Adjustability Features
Telescoping Lower Section:
Drill evenly spaced holes (1 cm apart) along the length of the lower section for height adjustment.
Install a spring-loaded detent button in the upper section that aligns with the holes.
Handle Height Adjustment:
Drill similar holes in the upper section for the handle height.
Attach a detent button to allow sliding and locking the handle into the desired position.

4. Fabricate the Armpit and Handle Supports
Armpit Support:
Mold or shape a plastic piece to create an ergonomic armpit rest.
Cover it with foam padding and secure it with adhesive or fasteners.
Handle Grip:
Shape and attach a horizontal grip bar with rubber or foam padding for comfort.
Secure it to the upper section using screws or rivets.

5. Assemble the Crutch
Connect the Sections:
Attach the upper and lower sections using the hinge mechanism.
Ensure smooth folding and locking capabilities.
Install Rubber Feet Tips:
Secure anti-slip rubber tips to the bottom of the lower section.
Attach Horizontal Support:
Connect the horizontal support to the mainframe for structural stability.

6. Test the Prototype
Load Testing:
Test the crutch under weight-bearing conditions to ensure it supports the required load without bending or breaking.
Folding and Adjustment Testing:
Test the folding mechanism, ensuring smooth operation and secure locking.
Verify the telescoping sections and detent buttons function correctly.
Comfort and Ergonomics:
Check the padding and grip for comfort during extended use.