Air curtain device for dust-free workshop

The utility model discloses an air curtain device for a dust-free workshop. The air curtain device comprises an air curtain machine body, a connecting wire, a filter screen, a round rod, a fixing pin,a reset coil spring, a rotating rod, a rubber block, an outer rod, a first spring, an inner rod, a first magnetic block, a sliding groove, a sliding block, a pressing plate, a second magnetic block,a pull rod, a first arc-shaped magnetic plate and a second arc-shaped magnetic plate. According to the utility model, the rotating rod rotates for 90 degrees; the elastic force of the spring I facilitates the magnetic block I to cling to the inner wall of the groove; further, the rotating rod is fixed; a user can conveniently mount the metal ring on the annular side surface of the round rod; toggle rotating rod, the magnetic block I is separated from the inner wall of the groove; under the action of the elastic force of the reset coil spring; the rotating rod rotates to return to the originalposition, the rubber block