High reliability drug infusion device

Abstract

A high reliability drug infusion device, includes: a drug storage unit including a drug outlet; a screw connected to a piston and a driving wheel provided with wheel teeth, respectively, the driving wheel drives the screw to move by rotation, pushing the piston forward; at least one driving unit cooperating with the driving wheel, the driving unit includes at least one driving portion a power unit and a reset unit connected to the driving unit, and the reset unit includes an elastic reset component and a linear-actuated reset component, and the elastic reset component alone applies a force to or together with the linear-actuated reset component to control the reset movement of the driving unit. The high reliability drug infusion can be used for improving the reliability and increasing the user's flexibility in choosing the infusion method.

1 . A high reliability drug infusion device, comprising:
 a drug storage unit including a drug outlet;   a screw connected to a piston and a driving wheel provided with wheel teeth, wherein the driving wheel drives the screw to move by rotation, pushing the piston, provided in the drug storage unit, forward;   at least one driving unit cooperating with the driving wheel, wherein the driving unit comprises at least one driving portion;   a power unit and a reset unit connected to the driving unit, wherein the reset unit comprises an elastic reset component and a linear-actuated reset component, and the elastic reset component alone or together with the linear-actuated reset component apply a force to control a reset movement of the driving unit, and,   when the power unit outputs a force on the driving unit, the driving unit rotates around a pivot shaft, driving the driving portion to push the wheel teeth, thus rotating the driving wheel;   when the reset unit outputs the force on the driving unit alone, the driving unit performs a reset rotation without the driving portion pushing the wheel teeth, thus making the driving wheel stop rotating; and   an infusion tube, used as a drug infusion channel, and comprising a connection end and a subcutaneous end, when the connection end is connected with the drug outlet and the subcutaneous end enters a subcutaneous, a drug is delivered subcutaneously through the infusion tube.   
     
     
         2 . A high reliability drug infusion device of  claim 1 , wherein the at least one driving portion comprises two driving portions, and under a cooperative operation of the power unit and the reset unit, the two driving portions alternately push the wheel teeth. 
     
     
         3 . A high reliability drug infusion device of  claim 2 , wherein the two driving portions alternately push the wheel teeth disposed on the driving wheel. 
     
     
         4 . A high reliability drug infusion device of  claim 2 , wherein the driving wheel includes two sub-wheels provided with the wheel teeth, and the two driving portions respectively alternately push the wheel teeth disposed on the two sub-wheels. 
     
     
         5 . A high reliability drug infusion device of  claim 1 , wherein the power unit and the linear-actuated reset component are an electrically driven linear actuator or an electrically heated linear actuator. 
     
     
         6 . A high reliability drug infusion device of  claim 5 , wherein the electrically driven linear actuator includes a shape memory alloy. 
     
     
         7 . A high reliability drug infusion device of  claim 1 , wherein the elastic reset component at least comprises a spring, an elastic sheet, an elastic plate, an elastic rod, or elastic reset rubber. 
     
     
         8 . A high reliability drug infusion device of  claim 7 , wherein the at least one driving portion includes one driving portion, and the elastic reset component is a spring. 
     
     
         9 . A high reliability drug infusion device of  claim 1 , further comprising a transitional connection member which is disposed outside the drug outlet, wherein one end of the transitional connection member connects with the drug outlet, while an other end of the transitional connection member is used to connect the connection end. 
     
     
         10 . A high reliability drug infusion device of  claim 9 , wherein the transitional connection member comprises a connection cavity or a connection port. 
     
     
         11 . A high reliability drug infusion device of  claim 1 , further comprising a program unit, which is connected to the power unit and the linear-actuated reset component, and according to infusion requirements, the program unit controls to output the force from the power unit or the linear-actuated reset component.