Patent ID: 11925784
Assignee: INNOMD MEDICAL TECHNOLOGY SERVICES CO. LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 5:
6. The insulin injection device according to claim 5, wherein:
the needleless injector comprises a cylinder body, a piston, a reset spring and a piston nozzle, the cylinder body has a cylindrical structure, a first end of the cylinder body is provided with at least one air inlet, and a second end of the cylinder body is provided with the piston nozzle, wherein the air inlet is connected to the air tank through a pipeline;
the piston is located inside the cylinder body and is configured to reciprocate along an axial direction of the cylinder body
the reset spring is located inside the cylinder body and between the piston and the piston nozzle;
the piston is used for moving in a direction close to the piston nozzle along an axis of the cylinder body under a driving action of the high-pressure driving gas and impacting a piston rod of the piston nozzle, so as to eject the insulin in the piston nozzle in the form of liquid flow; and
the reset spring is used for driving the piston to move in a direction away from the piston nozzle along the axis of the cylinder body to a free position after the piston moves in the direction close to the piston nozzle along the axis of the cylinder body to a limit position.