Handheld ink-jet printer

The utility model discloses a handheld ink-jet printer which comprises an ink-jet printer body, two sides of the ink-jet printer body are respectively and fixedly provided with a pair of bearing frames, a first synchronizing wheel and a second synchronizing wheel are respectively arranged between the bearing frames through rotating shafts, one side of the first synchronizing wheel is fixedly provided with an encoder, and the top end of the encoder is sleeved with a belt wheel. A groove is formed in the first synchronous wheel, an opening is formed in one side of the code spraying machine body, a spraying head is embedded in the opening, a mounting groove is formed in the other side of the code spraying machine body, movable grooves are formed in the two sides of the bottom of the mounting groove, a handle is movably installed between the movable grooves through a rotating shaft, and a lithium battery is connected into the handle in a clamped mode; and a control button is embedded in one side of the handle. Th