Omnibearing three-dimensional fool-proof jig for rear cover of mobile phone

The omnibearing three-dimensional fool-proof jig comprises a supporting table, a rectangular positioning plate used for bearing the rear cover of the mobile phone is arranged on the supporting table, the shape of the positioning plate is matched with that of the rear cover of the mobile phone, and the area of the positioning plate is smaller than that of the rear cover of the mobile phone, so that the rear cover of the mobile phone can be inversely buckled on the positioning plate. The outer sides of the four corners of the positioning plate are each provided with an L-shaped positioning block, gaps for containing the outer edge of the mobile phone rear cover are reserved between the positioning blocks and the positioning plate, and the bottom of the positioning plate is provided with a photoelectric sensor used for detecting whether the mobile phone rear cover is placed in place or not. The front side and the rear side of the positioning plate are symmetrically provided with a group of correlation sensors us