Micro needle driving device

A micro needle driving device in which a micro needle part is mounted at a tip end thereof such that the micro needle part is reciprocally moved, the micro needle driving device comprising:

• a body having an accommodation space inside thereof;
• a driving motor that is disposed in the accommodation space;
• a rotating shaft that is shaft-coupled to a rotary shaft of the driving motor to be rotated and has a guide boss on an outer peripheral surface thereof;
• and
• a moving cam assembly to which the micro needle part is coupled and in which at least a part of the rotating shaft is accommodated,
• wherein the moving cam assembly has a guide having a shape that is curved along a lengthwise direction of the moving cam assembly and disposed on an inner peripheral surface of the moving cam assembly,
• wherein the guide boss is slidably connected to the guide,
• wherein the moving cam assembly reciprocally and linearly moves along an inner surface of the body as the rotating shaft rotates, and
• wherein the rotating shaft has a sliding groove disposed on a front side thereof and the moving cam assembly has a guide pin that is slidably inserted into the sliding groove.