Two -dimensional code scanner that possesses sound wave write -back function

The utility model relates to a bar code collector technical field, and disclose a two -dimensional code scanner that possesses sound wave write -back function, the on -line screen storage device comprises a base, the top fixedly connected with shell of base, the right side fixedly connected with switch of shell, the inside fixedly connected with fixed column of shell, the top contact of fixed column has the circuit board, the inside contact of circuit board has the screw, the positive fixedly connected with of circuit board sweeps a yard control module. This two -dimensional code scanner thatpossesses sound wave write -back function aims at the two -dimensional code on the user terminal and sweeps sign indicating number mouthful, sweep a yard control module pass through optical fiber sensor with the two -dimensional code signal transmission on the acoustic wave transmission module, acoustic wave transmission module write -back sound wave, the hum device the during write -back inside the shell sends the prompt