A trigger unit (1) for triggering an extinguishing-agent flow in the direction of a fire zone, connected to an energy supply, having a first actuating device (3) that can be switched between a release position in which the energy supply is released, and an interruption position in which the energy supply is interrupted, a second actuating device (5) that can be switched between a release position in which the extinguishing-agent flow is released, and a rest position, a coupling unit (7) that can be moved between an operating position and an extinguishing position and permanently couples together the switching of the first actuating device (3) and the second actuating device (5). A tensioning element is connected in a force-transmitting manner to the coupling unit (7) in such a manner that a change in the tensioning state of the tensioning element always results in a movement of the coupling unit (7).