The utility model discloses a low -cost piece formula contact piece jack structure relates to connector technical field, including conductive main part and steel case, and the conductive main part includes the elastic region and the end region of increasing thickness in proper order, and is provided with the transition area of thickness conversion between the elastic region and the end region, is equipped with the elastic contact
cantilever on the elastic region, and the steel case sets up on the transition area and cooperates with the elastic contact
cantilever on the elastic region. The material of elastic region is thin, and a plurality of contacts are arranged on the elastic contact
cantilever, and the conductive function can be realized after contacting with the pin; the transition area is the thick, thin material conversion area; the end region is the connecting area of pencil and similar pencil function components, and generally uses the
welding, crimping etc. Mode to realize the connecting function. The steel case is wrapped in the outside of conductive main part, can promote the contact stability and the
ageing resistance of elastic region contact, realizes the anti -back function simultaneously, can guarantee the contact stability of
contact region, and can solve the problem of few and high cost of existing contact.