Medical insertion mechanism and medical device therewith

A medical device comprising:

• a case;
• and
• a medical insertion mechanism comprising:
• a base disposed on the case;
• a needle holder disposed on the base and slidable relative to the base along an insertion direction or a retraction direction opposite to the insertion direction, the needle holder comprising a pushing structure;
• a needle disposed on the needle holder;
• a cannula holder arranged at a position corresponding to the needle holder, the pushing structure being configured to abut against the cannula holder along the insertion direction;
• a cannula disposed on the cannula holder;
• a pivoting assembly disposed on the base and pivotable relative to the base from a first position through a second position to a third position;
• a lever movably disposed on the base and movably engaged with the pivoting assembly and the needle holder;
• an actuator disposed on the base, the actuator comprising an abutting structure configured to slidably engage with or disengage from the pivoting assembly;
• and
• a driving component configured to drive the pivoting assembly to pivot from the first position through the second position to the third position when the abutting structure slidably disengages from the pivoting assembly;
• wherein when the pivoting assembly pivots from the first position to the second position, the lever drives the needle holder and the cannula holder to slide along the insertion direction, so as to drive the needle and the cannula to move along the insertion direction together;
• wherein when the pivoting assembly pivots from the second position to the third position, the lever drives the needle holder to slide along the retraction direction to drive the needle to retract relative to the cannula.