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Jacob Key
R&D Engineer
Self-Retracting Needle Syringe
Organization:
Duke Course Advanced Design and Manufacturing
Project Description:
For my final project, I created a syringe that retracted the needle after use. This design is intended to reduce the risk of needle stick exposures to health care workers. In contrast to traditional needle retracting syringes, my design incorporates a slow retraction motion to prevent the risk of blood spatter caused by fast motion.
What I Learned:
This project required a lot of critical thinking about the mechanical design of the spring release mechanism as well as the mechanism to create a slow retraction. It also required thought into the user experience. To make the syringe more user friendly, I used a two-click mechanism; an initial click that indicates the syringe is depressed fully and further depression would cause the spring to release thus pushing the needle into the syringe barrel.
CAD Model of Syringe Assembly
CAD Model of Syringe Assembly
FEA of Spring Release Mechanism
with Design Change
Rendering
Final Product Video
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