Patent ID: 6953447

Claim:
A pre-filled injection device for injecting a liquid or semisolid composition into a subject, said injection device comprising: a housing ( 1 ) containing at its distal end the liquid or semisolid composition ( 2 ) to be injected, a plunger ( 3 ) arranged to slide within the housing ( 1 ) to which is affixed a plunger stick ( 7 ) extending longitudinally from the plunger to the outside of the housing ( 1 ), a hollow needle ( 4 ) affixed to the distal end of the housing ( 1 ), said needle ( 4 ) connecting the interior part of the housing ( 1 ) with the outside where it extends longitudinally, and an airtight needle shield ( 5 ) which protects said needle ( 4 ), wherein said device further comprises a cap ( 6 ) designed to fit around the housing's proximal end and to fully cover said plunger stick ( 7 ), said cap ( 6 ) both preventing its accidental pushing or breakage before use and being adapted to receive the injection device one the injection into the subject has been carried out, the cap includes in its inner or outer face a blocking element cooperating with an element present on the outer or inner face of the housing of the injection device to ensure that when the injection device is put into the cap designed to fit around the housing, said cap blocks the injection device so that both can no more be separated from each other.