Air exhaust mechanism of vacuum coating machine

The utility model is applicable to the technical field of vacuum coating machines, and provides an air exhaust mechanism of a vacuum coating machine, which comprises a pipe body and a sliding column, the sliding column is in sliding connection with the pipe body, a first baffle and a second baffle are arranged in the pipe body, the sliding column is in sliding connection with the first baffle, and the second baffle is in sliding connection with the second baffle. The sliding column is provided with spherical protrusions which are arranged at intervals and correspond to the first baffle, the distance between the two spherical protrusions is larger than the thickness of the first baffle, the sliding column is connected with the second baffle in a sliding mode, the second baffle is provided with a plurality of ventilation parts, and the ventilation parts are used for communicating spaces on the two sides of the second baffle in a one-way mode. Therefore, according to the utility model, the two baffles are utiliz