A body fluid extraction device (100) for extracting body fluids through a skin surface (102), the extraction device comprising: at least one hollow needle (104) having a base end and a tip and a channel (106) linking the base end and the tip in fluid communication； a needle carrier (108) to which the hollow needle is attached or integrated, the needle carrier comprising an outer side (110) configured to face the skin surface upon operation of the extraction device and an inner side (112) opposite to the outer side, wherein a length of the needle comprising the needle tip extends out of the outer side of the needle carrier； a support structure (114) connected to the needle carrier and configured to allow a relative movement of the needle carrier relative to the support structure in a direction (D) substantially perpendicular to the skin surface； a snap dome tripper (116) connected to the support structure, the snap dome tripper arranged and configured to induce a snap movement of the needle carrier relative to the support structure and wherein the needle carrier is attached to an application layer having a first stable state and a second stable state, the application layer being connected to the snap dome tripper, and wherein the snap dome tripper is further configured to: trigger a first change on the application layer, from the first stable state to the second stable state upon an occurrence of the snap movement； trigger a second change on the application layer, from the second stable state to the first stable state after an extraction time span has lapsed； and wherein a transition from the first stable state to the second stable state is configured to exert the predetermined activation force corresponding at least to the force required to push the hollow needle into the skin surface； and the transition from the second stable state to the first stable state is configured to facilitate an extraction of the hollow needle from the skin surface.
