Vacuum tube connector device for sucking dental handpiece waste water based on negative pressure

The utility model provides a vacuum tube interface device for sucking dental handpiece waste water based on negative pressure, which relates to the technical field of medical instruments and comprises a middle partition plate, limiting springs fixedly connected to the top surface and the bottom surface of the middle partition plate, a sliding strip arranged on the outer side of an inserting rod in a sliding connection mode, and a sliding hole vertically penetrating through the middle of the sliding strip and connected to the outer side of the inserting rod in a sleeving mode. The left ends of the sliding strips are fixedly connected with limiting wedge blocks, the right ends of the sliding strips are fixedly connected with pressing buttons, the two sets of limiting springs expand and reset to drive the two sets of sliding strips to slide and reset in the vertical direction, and the vertical face of the limiting wedge blocks and the left side face of the protruding part B can be limited; the left and right arc