Abstract: A filtering device is adapted to be mounted in a fan having a motor cover, a rotary shaft, an impeller combined at the rotary shaft, and a rear protective grill mounting on a mounting base provided on a front end of the motor cover. The filtering device includes an inner ring plate, an outer ring plate, and a filter element. The filter element is sandwiched between the inner ring plate and the outer ring plate, and the inner ring plate and the outer ring plate are coupled between the rear protective grill and the rear protective grill lock ring. The airflow sent out by the rotation of the impeller of the fan will pass through the filter element of the filtering device, achieving the effect of purifying air.

Abstract: A flying disc launcher includes a frame body including a loading seat and a side wall. The loading seat includes a carrying portion and a receiving portion. A flying disc inlet and a flying disc outlet are respectively defined in both ends of the carrying portion. The side wall includes a guiding wall opposed to the receiving portion. A turntable is installed in the receiving portion and protrudes from an upper surface of the carrying portion. The power component is connected with the turntable to drive the turntable to rotate. When the turntable rotates and a flying disc is placed on the carrying portion from the flying disc inlet, the guiding wall and the turntable can contact the flying disc to drive and guide the flying disc to fly out toward the flying disc outlet.