Safety assembly

A safety assembly for preventing needle stick injury with a needle, the needle having a proximal end fixed to a tip of a medical container and a pointed distal end, the safety assembly comprising:

• an attachment ring configured to be fixed to the tip of the medical container;
• a safety device configured to cover at least the distal end of the needle, the safety device being attached to the attachment ring;
• wherein:
• the attachment ring comprises an inner ring and an outer ring configured to be snapped onto each other,
• the inner ring comprises an inner recess configured for applying glue between the inner ring and the tip of the container,
• the inner ring and outer ring comprise mutually engaging elements preventing any rotation of the outer ring relative to the inner ring,
• the mutually engaging elements comprise an at least one male element and an at least one female element complementary to said male element, said male and female elements being configured such that when the outer ring is snapped onto the inner ring, the male element engages the female element, and
• the male and female elements have at least two inclined contact surfaces allowing the outer ring to slide relative to the inner ring under a combined pivotal and axial movement until the at least one male element engages a respective female element.