Anti-dragging projection equipment for smart classroom

The utility model provides an intelligent classroom anti-dragging projection device which comprises a top box, a servo motor is installed on one side in the top box, a rolling shaft is installed at the output end of the servo motor, a projection curtain is generated on the rolling shaft, the lower end of the projection curtain penetrates through a strip-shaped opening and is provided with a counter weight batten, and the counter weight batten is connected with the servo motor. One end of the balance weight batten is rotationally connected with a square pipe, a square plate is inserted into the square pipe, the side, away from the balance weight batten, of one side face of the square pipe is in threaded connection with a limiting screw used for limiting the position of the square plate, and the end, located on the outer side of the square pipe, of the square plate is in threaded connection with a connecting screw; a threaded blind hole matched with the connecting screw is formed in the middle of the lower surf