Patent ID: 8794109

Claim:
A tattooing apparatus comprising: a case; a motor disposed inside the case; a cam unit to convert a rotational movement of the motor into a linear reciprocating movement; a link connected to the cam unit and disposed inside the case to be linearly reciprocated by the cam unit; and a needle cartridge connected to a distal end of the case, and having a tattooing needle to linearly move in response to movement the link and tattooing ink to flow out along the tattooing needle; wherein the cam unit comprises; a cam having a substantially circular plate shape, the cam including a planar top surface which is parallel to a longitudinal axis of the tattooing needle, and a cam groove formed on the planar top surface of the cam, the cam groove having a substantially circular shape eccentric with respect to a rotation center of the cam; and a cam follower having a first end thereof inserted into the cam groove for cam contact, with its contact point substantially aligned with the longitudinal axis of the tattooing needle, and a second end thereof fixed to the link, and the cam follower reciprocating linearly when the cam rotates.