Introduction needle and tattoo device

A tattoo device, comprising an introduction needle and an external drive member, wherein,

• the introduction needle comprises a needle piercing portion and a liquid guiding member, the needle piercing portion comprises a piercing projection, the piercing projection is disposed on an end of the liquid guiding member, the piercing projection includes a substrate and a needle tooth, the needle tooth is fixedly arranged on a side surface of a side of the substrate, a central axis of the needle tooth is perpendicular to the side surface of the substrate;
• and
• the external drive member is configured to drive the liquid guiding member of the introduction needle to move.