Injection syringe

Syringe for one-off use, with a syringe barrel having an interior for containing an injection solution, a barrel stopper which can be displaced in the syringe barrel by a plunger rod, a needle unit accommodated in the syringe barrel and coupling means for connecting the plunger rod to the needle unit in order to retract the needle unit into the syringe barrel after injection, characterised in that the needle unit has a needle holder made from plastic surrounding an injection needle made from stainless steel across a part of its length, wherein the needle holder has an end facing the interior of the syringe barrel and wherein a seal insert seals the end of the needle holder from the interior of the syringe barrel, the seal insert being made from pharmaceutical rubber and through which the injection needle extends from a rear end of the needle holder,

• wherein a shoulder is formed on an external circumference of the seal insert, by means of which the seal insert sits axially against a shoulder of the syringe barrel disposed at an injection-end region of the syringe barrel.

Syringe for one-off use, with a syringe barrel having an interior for containing an injection solution, a barrel stopper which can be displaced in the syringe barrel by a plunger rod, a needle unit accommodated in the syringe barrel and coupling means for connecting the plunger rod to the needle unit in order to retract the needle unit into the syringe barrel after injection, characterised in that the needle unit has a needle holder made from plastic surrounding an injection needle made from stainless steel across a part of its length, wherein the needle holder has an end facing the interior of the syringe barrel and wherein a seal insert seals the end of the needle holder from the interior of the syringe barrel, the seal insert being made from pharmaceutical rubber and through which the injection needle extends from a rear end of the needle holder,

• wherein an inner annular bead is disposed close to an end of the syringe barrel remote from an injection end, a front face of which directed towards the injection end is oriented at least approximately at a right angle with respect to a wall of the syringe barrel and a rear face of which remote from the injection end subtends an obtuse angle with the wall of the syringe barrel.

Syringe for one-off use, with a syringe barrel having an interior for containing an injection solution, a barrel stopper which can be displaced in the syringe barrel by a plunger rod, a needle unit accommodated in the syringe barrel and coupling means for connecting the plunger rod to the needle unit in order to retract the needle unit into the syringe barrel after injection, characterised in that the needle unit has a needle holder made from plastic surrounding an injection needle made from stainless steel across a part of its length, wherein the needle holder has an end facing the interior of the syringe barrel and wherein a seal insert seals the end of the needle holder from the interior of the syringe barrel, the seal insert being made from pharmaceutical rubber and through which the injection needle extends from a rear end of the needle holder,

• wherein the needle holder is provided with longitudinal ribs in a region of its external face by means of which it is accommodated in a narrower end region of the syringe barrel.