1. EXO-SKELETON Hamed kalami (PhD Student)
Andre Khayat (Bachelors Degree)
Supervisor: Dr. Urbanic

2. CONTENTS What is Ehlers–Danlos Syndrome (EDS) Signs and symptoms
Problem to be Solved and Goal
Bones and joints of hand
Parametric dimensions of Hand
Previous Designs
Designs and Models
Parametric Design
Measuring System
Future Measuring System
Materials

3. Ehlers–Danlos SyndromeSigns and symptoms
Overly flexible joints - Because the connective tissue that holds joints together is looser, your joints can move far past the normal range of motion.
Stretchy skin - Weakened connective tissue allows your skin to stretch much more than usual.
Fragile skin - Damaged skin often doesn't heal well

4. Figure 21 Standard Bulky, Cumbersome, Poorly Sized Brace
Problem to be Solved
Bypass the tedious and costly procedures currently in place for EDS braces
Waiting period
Poorly fitted braces
Insurance coverage issues
No currently designed brace for many joints
Less costly braces
More customized
Figure 21 Standard Bulky, Cumbersome, Poorly Sized Brace

5. Bones and joints of hand
Bones of the right hand
Joints of the right hand
Metacarpal phalangeal Joint

6. Parametric dimensions of Hand
Proximal
Middle
Distal
Thumb
0.196 ∗ H L
lI −2 –
0.158 ∗ H L
lI −3
Index
0.265 ∗ H L
lI I −2
0.143 ∗ H L
I I −3
0.097 ∗ H L
lI I −4
0.277 ∗ H L
lI I I −2
0.170 ∗ H L
I I I −3
0.108 ∗ H L
lI I I −4
Ring
0.259 ∗ H L
lI V −2
0.165 ∗ H L
I V −3
0.107 ∗ H L
lI V −4
Small
0.206 ∗ H L
lV −2
0.117 ∗ H L
V −3
0.093 ∗ H L
lV −4
Parametric length for a hand
Metacarpal bones
Thumb
0.251 ∗ H L
lI −1
Index
(0.374 ∗ H L)2 + (0.126 ∗ H B)2
lI I −1
Middle
0.373 ∗ H L
lI I I −1
Ring
(0.336 ∗ H L)2 + (0.077 ∗ H B)2
lI V −1
Small
(0.295 ∗ H L)2 + (0.179 ∗ H B)2
lV −1
Parametric length for a finger
Parametric length for a thumb

7. PREVIOUS DESIGNS

8. Designs and Models Casing Design Brace Design Pillbug Design
Whole Hand Brace

9. Casing design Simple design 2 parts Functional
Easy to make it aesthetic
No pinching

10. Brace Design Curves are fit on the finger Parametric design Aesthetic
Light
Hinge for DIP and static for PIP
Simple mechanism

11. Pill bug (Accordion) design

12. Models for Whole Hand

13. Parametric Design

14. Measuring System Point cloud Sophisticated surfaces Needs steady part
Takes time to scan

15. Future Measuring System
Structured-light 3D scanner
Scanning whole the surface in one time
Quick
Not effected by object movement
Point cloud to polygon software
Very fast
Automated
accurate

16. Materials Material Cost/Kg (USD) Pro Con Extruder Temp (°C)
Application
ABS
$29.00
Availability, ease of use, affordability
Hardness, roughness
Stiff, non-movable parts,
Ninjaflex
$110.00
Flexible, Retains Shape after Deformation
Complex Printing
Phone Cases
Nylon
$57.30
Flexible when thin, High Tensile Strength, Lightweight
Complex process, High Price
Printed Gears
TPU
$104.80
Flexibility, Elasticity, Chemical Resistance
Difficulty Maintaining Stiffness/Shape, High Price
Medical Devices

17. Stair Assist Robust Frames Load-Bearing Components
Large-scale, intricate profiles
Multi-Material and Multi-Process Interface

18. Stair Assist Prototype CAD Model
Individual components modeled in Catia V5
Brought together in common assembly
Frame padded out from behind
Complete Model of Prototype obtained

19. Stair Assist Prototype Manufactured Model
Individual components dissected into printable/machineable parts based on necessary mechanical properties
Entire assembly brought together into functional prototype employing various manufacturing methods seamlessly

20. Other Designs

21. Thank You