DEVICE FOR THE AUTOMATIC INJECTION OF TWO DOSES OF A MEDICAMENT

摘要

A two-dose autoinjector for a medicament wherein the locking and releasing of the drive spring (27) of the autoinjector is controlled through stepped guide means (16, 24) with ramps for two successive slidings therealong of slide means (28, 29) operated by the spring and connected with the syringe (21) and relevant plunger (26). The guide means and the slide means are pivotable relative to one another and the sliding direction, while the syringe can only slide axially, and the triggering control for each sliding is obtained by pressing a trigger (30), axially slidable relative to a stationary member (1), against the patient's skin to push the slide means first into one ramp and then into the other ramp of the guide means. To enable or disable the sliding of the slide means within the guide means a angularly mobile arming member (11) is provided formed with a guide track (14) substantially equal to that of the stationary member where the guide means are formed. Following two subsequent angular arming displacements of the mobile member relative to the stationary member the ramps and the guide track are radially aligned to enable the slide means to slide under the action of the spring and therefore deliver the first dose and then the second dose.