The invention relates to an activator unit for an autoinjector, comprising a substantially cylindrical housing (3) in which an axially movable pressure pin (4) is guided, said pressure pin being insertable counter to a spring unit and being lockable, when inserted, by means of detent projections (6) of a retaining element (5) that is connected to the pressure pin. The spring unit comprises a first spiral spring (1) and at least one second spiral spring (2) having a larger diameter than the first spiral spring, the second spiral spring being coaxial to the first spiral spring.
