Discharge device, in particular toilet flusher, having a tank that can be coupled

A release device, in particular toilet freshener, for releasing at least one preparation into the interior of a toilet bowl, comprising:

• a dispenser;
• at least one container couplable with the dispenser for storing at least one preparation;
• a release element comprising a release orifice for releasing preparation, the release element being connected to the container via a line, the bottom of the container being arranged above the release orifice of the release element in the direction of gravity, such that a difference in level Δh is formed between the bottom of the container and the release orifice of the release element;
• a line coupling, in a communicating manner, the release element to the container and extending, at least in portions in the direction of gravity above the filling level of the preparation, such that, in the flow direction of the preparation through the line, a difference in level ΔH contrary to the direction of gravity is formed;
• and
• a pin connected in communicating manner to the line being arranged on the dispenser, which pin interacts with the couplable container in such a manner that, during coupling of the container with the dispenser, the pin displaces a volume Δv of preparation in the container, whereby a pressure Δp is produced in the container, which pressure conveys the preparation over the difference in level ΔH into the line.