Mechanical map folder

Abstract

A mechanical card case comprising a sliding table top, a sliding groove base plate, a cover, and a stepped rod, wherein the sliding table top and the sliding groove base plate form a pair of slide rails that are movable relative to each other in a vertical direction, wherein the stepped rod is arranged in the sliding table top and the sliding groove base plate and is rotatable relative to each other, and wherein the cover is arranged above the slide rails formed by the sliding table top and the sliding groove base plate and is rotatable relative to the sliding groove base plate via a cover cylinder, wherein the cover cylinder is provided with a spring, wherein the sliding groove base plate is further provided with a setscrew that passes through the sliding groove base plate and bears against the cover, wherein, when the cover is perpendicular to the sliding table top, the cover is rotated clockwise relative to the sliding table top when the sliding table top is moved downwards.until the lid is parallel to the sliding table top, and as the sliding table top continues to move downwards, the stepped rod is rotated clockwise relative to the sliding table top, thereby pushing out the cards arranged on the stepped rod by means of the stepped arrangement.