O-shaped ring neglected loading prevention detection device

The utility model relates to the technical field of O-shaped ring assembly. The utility model relates to a detection device, in particular to an O-shaped ring neglected-loading-preventing detection device. The device comprises a column body, a mandrel, a contact induction piece and a sleeve, the mandrel and the contact induction piece are arranged on the lower end face of the column body, the sleeve can movably sleeve the mandrel in the axial direction, the contact induction piece is opposite to the upper end face of the sleeve in a spaced mode, the diameter of the mandrel is smaller than theinner diameter of an O-shaped ring to be detected, and the outer diameter of the sleeve is larger than the O-shaped ring. The O-shaped ring neglected-assembly-preventing detection device can conveniently and effectively detect whether neglected assembly exists in O-shaped ring assembly or not, is simple in structure, low in manufacturing cost and reliable in detection result, facilitates improvement of the rework problem