Liquid supplying device for human insulin injection

A liquid supplying device for the human insulin injection, comprising:

• at least one substrate;
• at least one liquid storage chamber disposed on the substrate, configured to store at least one insulin liquid, and having at least one liquid storage outlet;
• at least one flow-guiding-and-actuating unit disposed on the substrate and having at least one liquid guiding channel in fluid communication with the liquid storage outlet, wherein the liquid guiding channel has at least one liquid guiding outlet in fluid communication with the liquid storage outlet, wherein the flow-guiding-and-actuating unit is enabled to transport the insulin liquid and then discharge the insulin liquid through the liquid guiding outlet;
• a plurality of switching valves having a first switching valve covering the liquid storage outlet and a second switching valve covering the liquid guiding outlet, respectively;
• at least one microneedle patch attached under the flow-guiding-and-actuating unit and in communication with the liquid guiding outlet, wherein the insulin liquid is transported into the microneedle patch through the liquid guiding outlet, and the microneedle patch has a plurality of hollow microneedles configured to be inserted into skin of a human subject with minimal invasion to introduce the insulin liquid into subcutaneous tissue of the human subject;
• at least one sensor disposed on the substrate and configured to be in contact with the skin of the human subject to measure a blood glucose level contained in sweat and generate at least one measured data correspondingly;
• and
• at least one driving chip disposed on the substrate and configured to control the actuation of the flow-guiding-and-actuating unit, control open/closed states of the plurality of switching valves and receive the measured data from the sensor for determination;
• wherein when the plurality of hollow microneedles of the microneedle patch are inserted into the skin of the human subject with minimal invasion and the sensor detects that the measured data of sweat meets at least one specific blood glucose level, the driving chip controls the actuation of the flow-guiding-and-actuation unit, controls the first switching valve in the liquid storage outlet to be in open state and controls the second switching valve in the liquid guiding outlet to be in open state so that the insulin liquid within the liquid storage chamber is discharged through the liquid guiding outlet and flows into the microneedle patch, whereby the insulin liquid is further discharged through the plurality of hollow microneedles and injected into the subcutaneous tissue of the human subject.