A second plunger (9) arranged in a fitted manner with the first plunger (8); a second plunger (9) fitted to the case (2); a first plunger (8) Comprising a first drive spring (10) for biasing the first plunger (8) against the first plunger (9) and a second drive spring (11) for biasing the first plunger (8) against the second plunger A delivery device (1) is described.