 The name "pogo pin" comes from the pin's resemblance to a pogo stickthe integrated helical spring in the pin applies a constant normal force against the back of the mating receptacle or contact plate, counteracting any unwanted movement which might otherwise cause an intermittent connection.This helical spring makes pogo pins unique, since most other types of pin mechanisms use a cantilever spring or expansion sleeve.A complete connection path requires a mating receptacle for the pin to engage, which is termed a "target" or "land".