3D-printed leg brace with an automatic knee lock
A leg brace designed and 3D-printed to the patient's measurements, with a knee joint that locks automatically when the leg is fully straight so the patient can stand and walk with confidence, and unlocks by hand to sit down.
The problem
Ready-made braces come in generic sizes, are heavy and expensive, and most are imported. A patient who needs full stabilization ends up with a brace that doesn't fit their body, abandons it, and goes back to the wheelchair.
How it works
- MeasurementTaking the limb's measurements and defining the required range of motion.
- DesignModeling the brace and joint to the patient's measurements.
- PrintingPrinting the parts in a durable material and assembling the joint.
- TestingTrying the brace on the patient and adjusting pressure points and range of motion.
Project features
- Designed to the patient's own measurements, not a generic size; measuring and design are part of the project.
- A lock that engages automatically at full knee extension, which the patient releases by hand to sit down.
- Lightweight thanks to 3D printing, compared with metal braces.
- Adjustable and reproducible: the design is digital and reprinted when changed.
Parts
All the parts you need in one place. Remove what you already have, and swap parts to fit your budget. Parts with a photo are available in our store at their current price.
Prices are estimates and may change. Parts marked “other supplier” are ordered outside our main store.
Expected challenges
These are the main obstacles to expect during the build, laid out clearly so you know them before you start.
- ⚠ This is an educational project; medical braces are prescribed and fitted under the supervision of a prosthetics specialist.
- Poorly distributed pressure points cause sores — the most serious brace problem.
- Printed materials are weaker than metal, and the joint is the first part to break.
- Every adjustment needs a new print and fitting, which makes the development cycle slow.
The consultation gives you a solution for each one.
Similar projects
Projects close to this one in idea or parts. Check the differences before deciding, and borrow ideas you can add to your own project.
Students' experiences
Add a comment on the idea: +2 points. Or share your experience with photos of your build: +10 points. Every 50 points become a JD 5 discount voucher on parts orders.
Need solutions to the challenges and a complete technical path?
In the consultation we give you a solution for each challenge above, plus a practical build plan from the first step to the last: technologies, libraries, wiring diagram, timeline, and tips for the defense.
- Consultation session
- PDF with solutions and a plan
- 20 د.أ فقط