Rotatable Segmented Puncture Needle Reduces Skin Resistance

The needle body is divided into multiple needle parts (first needle part, second needle part, third needle part) arranged along the central axis. Each needle part can be independently projected forward, allowing sequential penetration through different skin layers. This segmentation reduces the force required compared to a single rigid needle, as each segment can be independently controlled to minimize resistance.

The needle parts are configured to be dynamically projectable along the central axis. The driving section enables each needle part to move independently from its retracted position to its projected position, creating a dynamic penetration system. This dynamic configuration allows the needle to adapt to the varying resistance of different skin layers, reducing overall puncture resistance.

The segmented needle structure allows gradual penetration through skin layers rather than forcing a single needle through all layers at once. Each needle part can be sequentially projected to reach the desired depth, minimizing tissue squeezing and reducing stimulation of pain nerves and blood flow blockage.

The needle parts can be selectively projected to different extents depending on the required penetration depth. Not all needle parts need to be fully extended simultaneously, allowing partial action that achieves the necessary penetration while minimizing harmful effects on surrounding tissue.