The current invention discloses a device for subcutaneously introducing a cannula of a subcutaneous infusion device into a patient, the device comprising a housing (110) defining a cavity, a needle (130) hub disposed in the cavity having a first position and a second position relative to the housing and along an axis, and comprising a needle, a site removably coupled in the housing and comprising the cannula, and a biasing member (150) aligned with the axis and interacting with the needle hub such that when the housing (110) is selectively displaced in a first direction along the axis, the biasing member (150) is deformed in a first manner, the needle (130) hub is maintained in the first position relative to the housing (110) while moving in the first direction to introduce the needle (336) and the cannula into the patient until the needle (130) hub has moved a distance in the first direction at which the biasing member (150) is deformed in a second manner to move the needle hub in a second direction, opposite the first direction, to the second position along the axis to retract the needle relative to the housing.
