Safety syringe

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/178 (2006.01) A61M 5/32 (2006.01)

Patent

CA 2571260

A safety syringe includes a barrel, a push rod, a driving module, and a needle mount. The barrel includes a hollow passage and a barrel cover, and the push rod includes a pad disposed around a distal portion and pushed tightly along the hollow passage of the barrel, and the barrel cover includes a plunger, a driving module of a piston pump, and a needle mount having a cut surface at the piston pump, such that the distal portion of the push rod pushes the plunger to move forward, while the cut surface of the distal portion and the cut surface of the needle mount are pressed to separate with each other, and the plunger continues moving forward to offset the air pressure therein, so as to retract the needle mount into a push rod accommodating cavity to accommodate the needle safely after an injection is taken place.

Une seringue sécuritaire comprend un corps, une tige poussoir, un module d'entraînement et un embout porte-aiguille. Le corps comprend un passage creux et une housse de corps, et la tige poussoir comprend un tampon disposé autour d'une partie distale et poussée de manière serrée long du long du passage creux du corps et la housse de corps comprend un piston, un module d'entraînement de pompe à piston et comprend un embout porte-aiguille muni d'une surface coupée à la pompe à piston, de façon que la partie distale de la tige poussoir pousse le piston à se déplacer vers l'avant, alors que la surface coupée de la partie distale et la surface coupée de embout porte-aiguille sont pressées pour se séparer l'une de l'autre et le piston continue à se déplacer vers l'avant afin de décaler la pression d'air à l'intérieur, de façon à rétracter l'embout porte-aiguille dans une cavité de logement de la tige poussoir afin de loger l'aiguille de manière sécuritaire après une injection.

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