| 摘要 |
<p>The invention relates to an injection device, comprising a syringe (3) with a hollow needle (4) and a stopper (6) for sealing the syringe (3) and displacing a medicament (M) stored in the syringe (3), the injection device further comprising a drive means (8), a plunger (9) arranged for pushing against the stopper (6) and an arrangement for transferring a translation of the drive means (8) to the plunger (9), the arrangement comprising an elongate release latch member (22) pivoted at one end which is connected to either the drive means (8) or the plunger (9), the release latch member (22) having another end for engaging the respective other one of the drive means (8) or the plunger (9), wherein the release latch member (22) is arranged to have its non- pivoted other end disengaged by rotation due to contact between at least one ramp (15.2, 22.1) and another component when the stopper (6) has at least nearly displaced all of a predefined dose of the medicament (M), wherein a length of the release latch member (22) is specified so as to provide a clearance between the plunger (9) and the drive means (8) when the release latch member (22) is engaged in order to allow at least the plunger (9), the stopper (6) and the hollow needle (4) to be retracted at least far enough to hide the needle (4) inside the syringe (3) or inside a housing (2) after disengaging the release latch member (22).</p> |
