Tattoo machine

A tattoo machine comprising:

• a tubular housing including a hollow interior, wherein the tubular housing includes a bottom end adapted to face a human skin when in use and a top end opposite to the bottom end;
• an electromagnetic assembly disposed in a section of the tubular housing, wherein the electromagnetic assembly includes a first through-hole extending axially through the electromagnetic assembly;
• a magnet unit disposed in the first through-hole, wherein the magnet unit includes a second through-hole extending axially through the magnet unit;
• a core bar extending through the second through-hole, wherein the core bar includes a tattoo needle on an end thereof, and wherein the tattoo needle is configured to be actuated by the magnet unit to an exposed position outside of the bottom end of the tubular housing;
• an elastic element disposed in the tubular housing, wherein the elastic element is directly or indirectly connected to the magnet unit or the core bar for returning the core bar;
• and
• an electric power transmission unit electrically connected to the electromagnetic assembly, wherein the electric power transmission unit is configured to be in electrical connection with a power grid or a power supply and is configured to output pulse current to the electromagnetic assembly, such that a polarity created at a top end of the electromagnetic assembly is identical to a polarity created at a top end of the magnet unit.