Automatic lifting structure of code spraying printing head

The utility model relates to the technical field of UV ink-jet printing machines, and discloses an ink-jet printing head automatic lifting structure which comprises a support, a cross beam is arranged on the support, a fine adjustment device is arranged on the cross beam in a sliding mode, a first sliding block is arranged on the fine adjustment device, a first guide rail is arranged on the first sliding block in a sliding mode, and a nozzle vertical plate is arranged on the first guide rail. A motor mounting plate is arranged on the spray head vertical plate, a motor is arranged on the motor mounting plate, a main shaft of the motor penetrates through the motor mounting plate to be connected with a lead screw, a lead screw mounting block is arranged on the fine adjustment device, and the lead screw penetrates through the lead screw mounting block and is in spiral fit with the lead screw mounting block. Lifting of the nozzle vertical plate is achieved through driving of positive and negative rotation of the m