Abstract: A turn table includes a tray with heart-shaped and straight sliding rails and a base with first and second rods, wherein the first rod is slidably matched with the heart-shaped sliding rail, and the second rod is slidably matched with the straight sliding rail. When the tray is at an initial position, symmetrical lines of the bottom of the tray and the heart-shaped sliding rail are collinear, and the straight sliding rail extends along the symmetrical line of the heart-shaped sliding rail. When the tray switches from the initial position to a picking position, the first rod slides along the heart-shaped sliding rail and the second rod slides along the straight sliding rail, making the tray rotate circumferentially relative to the base with an outer circumferential surface thereof being prevented from interfering with an inner wall of a chamber for placing the turntable and thus accommodating the tray therein.