Syringe injector for 8mm diabetes style syringe

thingiverse

Due to a blood clot, I was prescribed Fragmin syringes to prevent it from forming again. Since I couldn't self-administer the medication, I created this custom injector. The device inserts the needle into body fat, but requires manual pressure on the plunger for injection. This design accommodates 8mm diameter syringes and necessitates one O-ring measuring 8 x 12mm for friction, two M3 screws, and two pulling springs sized 6 x 20mm. After conducting a thorough online search, I was surprised to find no similar device available. My creation may not be the most sophisticated design, but it effectively works with the materials I had on hand, including leftover springs. It's worth noting that only one spring is actually required for proper function.