▎ 摘　　要

NOVELTY - The invention claims a printing head of intelligent card graphene conductive paste, comprising a feeding pipe, a brush head conversion component and a stop component, the lower end of the feeding pipe is provided with a mounting port, the brush head conversion component comprises a plurality of brush heads rotating plate around the rotating plate, the brush head can be matched and installed to the mounting port; rotating plate is set on the outer side wall of the feeding pipe, the rotating disc can rotate to drive the brush head to rotate to the position of the mounting port and the brush head is mounted to the mounting port; the stopping component is fixed on the outer side wall of the feeding pipe and located above the rotating plate, the outer side of the rotating disc is provided with a groove, the stopping component can move downwards and interference with the groove to prevent the rotating plate. through the brush head conversion assembly, when needing to change the brush head, the to-be-replaced brush head is taken away from the mounting opening; then through the rotating disc, the new brush head to be replaced is rotated to the proper position, and it is fixed at the mounting opening, it can save the replacing time of the brush head as much as possible, avoid the graphene conductive paste from serious oxidation.