Tooth selection mechanism of diaphragm gas meter calibration error correction tooth matching device

The utility model discloses a tooth selecting mechanism of a diaphragm gas meter verification error correction tooth matching device. The tooth selecting mechanism is characterized by comprising a discharging plate of a straight-strip-shaped structure. A plurality of discharging grooves are evenly formed in the upper plate face of the discharging plate at intervals in the length direction, the length direction of each discharging groove is consistent with the width direction of the discharging plate, and the two ends of each discharging groove form an extending-in end and a discharging end. The device further comprises a transverse moving assembly and a pushing assembly. A moving part on the transverse moving assembly can move back and forth and be positioned in the length direction of the discharging plate, a pushing and ejecting assembly is fixedly installed on the moving part, and a pushing and ejecting part on the pushing and ejecting assembly can eject out the driving gear and the driven gear in the sing