Mechanical extension invisible fan

The invention relates to a mechanical extension invisible fan. The mechanical extension invisible fan comprises a fixed frame, a lifting rod, a motor, blades and a rotating disc; the upper end of thelifting rod is fixed on the fixed frame; a lifting cup covering the fixed frame and a motor dustproof cover covering the motor are inserted in the lifting rod in sequence from top to bottom; the motoris fixed with the lower end of the lifting rod through a motor lifting head; the middle part of the rotating disc is fixed with a driving shaft of the motor; multiple blade extension control motors are arranged in the peripheral direction of the rotating disc at equal intervals; the blades are driven to open or close by the blade extension control motors; a disc type control blade integrated circuit board and a disc type control blade power supply circuit board are bonded at the lower part of the rotating disc in sequence; a decorating disc is mounted at the lower part of the rotating disc through a decorating disc fi