FIELD: beverage preparation devices.
SUBSTANCE: according to one aspect of the invention, brewing module (1) for an extraction appliance, for example a coffee machine, for preparing a beverage or other product in portion form from a soluble product or extraction substance packaged in portion pack (10) has housing (2), a first brewing-module part, which can be moved relative to the housing by a mechanism, and a second brewing-module part. First brewing-module part forms an injector for introducing an extraction liquid into the portion pack and the second brewing-module part forms a discharging device for discharging an extraction product out of the portion pack, or vice versa. Second brewing-module part can be moved relative to housing (2) in a direction counter to the movement direction of the first brewing-module part. Brewing module may have a cam disc with a helical guide groove, which engages with a guide element at least of the one brewing-module part such that rotation of the cam disc causes said brewing-module part to move axially. Arrangement of the guide element relative to the guide groove may be such that the guide element secures itself in the guide groove as pressure builds up in the interior of the brewing chamber.
EFFECT: piercing tip, for example of the injector, is displaceable relative to the housing of the latter in the direction of the interior of the brewing chamber when the latter is being closed.
15 cl, 18 dwg
