| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an injection device provided with a safety system for protecting an injection needle after use.SOLUTION: An injection device according to the present invention comprises: a main body receiving a product, the main body having a needle and a piston attached to a piston rod movable between a storage position and an end-of-injection position; a sleeve for protecting the needle, the sleeve being movable between an initial position, where the needle is uncovered, and a final position, where the needle is covered; a spring for moving the sleeve from its initial position to its final position; and immobilization means for keeping the sleeve in its initial position. In addition, the piston rod comprises a first portion and a second portion, the second portion being able to switch between a locked position, in which the second portion is fixed to the first portion, and an unlocked position, in which the second portion is movable with respect to the first portion for a predetermined distance along a longitudinal axis of the piston rod.</p> |
