Computer desk

A computer desk, comprising:

• a desktop, wherein the desktop is provided with an accommodating gap;
• and
• a desktop supplementary board, wherein the desktop supplementary board is connected to the desktop using a turning device, and a display is mounted on the turning device;
• and
• the desktop supplementary board has, relative to the desktop, a first position and a second position, when the desktop supplementary board is at the first position, the desktop supplementary board is in the accommodating gap, and the display stands upright on the desktop, and when the desktop supplementary board is at the second position, the desktop supplementary board is located below the desktop, and the display is in the accommodating gap;
• wherein the turning device comprises:
• a first rotary shaft, wherein the first rotary shaft is mounted on a back surface of the desktop;
• a second rotary shaft parallel to the first rotary shaft, wherein the second rotary shaft is provided with the display;
• a third rotary shaft parallel to the first rotary shaft, wherein the third rotary shaft is connected to the desktop supplementary board;
• a first connecting rod separately connected to one end of the first rotary shaft, the second rotary shaft, and the third rotary shaft;
• and
• a second connecting rod separately connected to an other end of the first rotary shaft, the second rotary shaft, and the third rotary shaft;
• wherein the first connecting rod and the second connecting rod are two L-shaped connecting rods parallel to each other, each L-shaped connecting rod comprises a first support rod and a second support rod that are perpendicular to each other, two ends of the first rotary shaft are respectively connected to corners of the two L-shaped connecting rods, two ends of the second rotary shaft are respectively connected to end portions of the two first support rods, and two ends of the third rotary shaft are respectively connected to end portions of the two second support rods.