Syringe

A syringe, comprising:

• a barrel,
• a plunger moveably arranged within said barrel and a plunger rod for driving said plunger,
• a first engagement member having a substantially circular shape, arranged at the plunger rod such that a longitudinal movement of the plunger rod yields a rotational movement of said first engagement member, said first engagement member comprising a grooved surface;
• and
• a second engagement member arranged at the barrel, and comprising an engaging member adapted to engage with the grooved surface of the first engagement member, wherein the engaging member is movable between a first stage, wherein the engaging member engages with a groove, and a second stage, wherein the engaging member engages with a protrusion, wherein the first engagement member is arranged to move relative to the second engagement member such that at least one of audible or tactile feedback is given to a user as the plunger rod is moved relative to the barrel for driving said plunger,
• wherein said first engagement member is arranged at said plunger rod with a predetermined play there between provided by a gap in the engagement between the first engagement member and the plunger rod, wherein said play allows for a predetermined relative movement between said first engagement member and said plunger rod, wherein the first engagement member and the plunger rod move independently of one another, and the first engagement member is allowed to accelerate until stopped by an engagement with the engaging member of the second engagement member, and
• wherein the engaging member comprises an arm configured to engage the first engagement member, and the second engagement member comprises a plurality of cut-outs disposed to accommodate movement of the arm, the plurality of cut-outs comprising a first cut-out parallel to a second cut-out extending along opposing surfaces of the arm.