On-board unit (OBU) device with tag card not easy to fall off

The utility model relates to the technical field of on-board units (OBU), and discloses an on-board unit (OBU) device with a label card not easy to fall off, which comprises an OBU main body, a label card placing groove is arranged on the right side of the OBU main body, connecting terminals are arranged on the inner walls of the front side and the rear side of the label card placing groove, and the label card placing groove is connected with the connecting terminals. A connecting block is fixedly arranged at the top of the right side of the OBU body, and a first guide rail is arranged at the bottom of the connecting block. According to the OBU device with the tag card not prone to falling off, the card insertion alignment effect of the OBU can be improved through the guide rails on the connecting block and the movable stop block, the bottom end of the tag card makes contact with the inclined face of the second guide rail during card insertion, the movable stop block is pushed to move downwards, after the tag