The invention relates to the technical field of storage devices, in particular to a PLA
straw conveying mechanism which comprises a conveying box, a cover plate and a
locking mechanism, a mounting groove is formed in the top of the conveying box, a hinge groove is formed in one side of the mounting groove, an
insertion opening is formed in the other side of the mounting groove, a hinge shaft is arranged in the hinge groove, and a hinge block is arranged on one side of the cover plate. A mounting block is arranged on the other side of the cover plate, and the hinge block is hinged to the hinge shaft; the mounting block is matched with the
insertion opening; the
locking mechanism comprises locking blocks and springs, telescopic grooves are formed in the side walls of the two sides of the mounting block, the locking blocks are arranged in the telescopic grooves, and the springs are connected to the sides, located in the telescopic grooves, of the locking blocks and the inner walls of the telescopic grooves; a locking opening is formed in the side wall of the
insertion opening, and the locking block is matched with the locking opening. According to the packaging box, the cover plate is effectively prevented from being opened due to vibration or
impact in the transportation process, meanwhile, the cover plate is prevented from being downwards extruded and shrunk into the box body, a
straw is flattened, and the
straw in the transportation process can be effectively protected.