Air pressure switch

The utility model relates to an air pressure switch which comprises a switching mechanism, a transmission mechanism, a base and a one-way valve. The switching mechanism is arranged at one side of the transmission mechanism. The one-way valve is arranged under the base. The transmission mechanism is hinged to a transmission frame. Two opposite rocker seats are formed on the base and a rocker is hinged between the rocker seats. The rocker 5 is connected to the moving contact bridge of the switching mechanism. The transmission frame and the rocker are connected through a torsion spring. Rocker holes are formed on the rocker seats and are provided with installation grooves whose widths are smaller than the diameters of the rocker holes toward one side. The rocker shafts of the rockers are formed corresponding to the rocker holes, the cross sections of the rocker shafts are long round shapes, and the width between two parallel sides of the rocker shafts is same with the width of the installation grooves. According to the air pressure switch, the rocker shafts of the rockers are in the shape of long circles, through the parallel side with a small width, the rocker shafts can conveniently slide into the rocker holes from the installation grooves on the rocker seats, the assembly is convenient, and the rocker seats and the base are not damaged.