According to an embodiment of the invention , the injection device for administering a liquid ( 1 ) provides a needle safety needle pre-filled syringes ( 3 ) and pre-filled syringes ( 3 ) ( 3.2 ) including a safety mechanism for . Pre-filled syringes ( 3 ) , the distal end of the stopper ( 3.5 ) , the barrel ( 3.1 ) of the liquid accommodating the barrel ( 3.1 ) , are translatably arranged in the barrel ( 3.1 ) I includes a needle ( 3.2 ) attached to . Safety mechanism , pre-filled syringes of the adapted substantially cylindrical to accommodate ( 3 ) housing ( 2 ) is connectable to the stop ( 3.5 ) of the pre-filled syringes ( 3 ) , and injection needle plunger adapted to be translated in the distal direction (D) to release the liquid through ( 3.2 ) ( 4 ) , it is placed between the housing ( 2 ) and pre-filled syringes ( 3 ) where energy deposition possible biasing means ( 6 ) [ , biasing means which is energy deposition ( 6) , pre-filled syringes (3 ) is biased in the proximal direction (P) relative to the housing ( 2 ) it may , as well as pre-filled syringes ( 3 ) a first retracted position relative to the housing (2) (R1), the forward position (A) and the second holding mechanism for holding the retracted position (R2) of I include a . Needle ( 3.2 ) is covered by the housing in the first and second retracted position (R1, R2) (2), and in the advanced position (A) protrudes from the housing ( 2 ) in the distal direction . Biasing means ( 6) , when the pre-filled syringes ( 3 ) is in a first retracted position (R1) is placed in a state of not being given energy . Biasing means ( 6 ) , the syringe ( 3 ) a forward position to urge toward the second retracted position from (A) (R2), the forward position from a first retracted position (R1) (A) pre-filled syringes to ( 3 ) is adapted to be imparted energy when translated .本発明の実施態様によれば、液体を投与するための注射デバイス(1)は、充てん済みシリンジ(3)及び充てん済みシリンジ(3)の注射針(3.2)に針安全性を提供するための安全機構を含む。充てん済みシリンジ(3)は、液体を収容したバレル(3.1)、バレル(3.1)内で並進可能に配列されるストッパ(3
