Unilaterally driven drug infusion device with multiple infusion modes

Abstract

A unilaterally driven drug infusion device with multiple infusion modes includes a reservoir, a piston, a screw, a driving unit, at least one driving wheel provided with teeth, a linear actuator, a reset unit, and a control unit. The piston is arranged in the reservoir. The driving unit includes a rotating shaft and a driving member, and the driving member includes a driving end. The linear actuator and the reset unit are respectively connected to the driving member. The control unit controls the linear actuator or the reset unit to apply different driving powers on the driving member to make the driving member have a variety of different operating modes.

1 . A unilaterally driven drug infusion device with multiple infusion modes, the drug infusion device comprising:
 a reservoir, a piston and a screw, wherein the piston is connected with the screw, and is arranged in the reservoir;   a driving unit including at least one rotating shaft and at least one driving member, wherein the driving member includes at least one driving end, and the driving member is able to rotate around the rotating shaft to advance or reset the driving end;   at least one driving wheel provided with wheel teeth, the driving end, which advances, is able to push the wheel teeth to rotate the driving wheel, and drive the screw to move forward;   a linear actuator and a reset unit respectively connected to the driving member, wherein the linear actuator and the reset unit respectively apply driving power to the driving member to advance and reset the driving end; and   a control unit, connected to the linear actuator or the reset unit, wherein the control unit controls the linear actuator or the reset unit to apply different driving powers on the driving member to make the driving member have a variety of different operating modes, such that the infusion device has various different infusion increments or infusion rates.   
     
     
         2 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 1 , wherein
 the variety of different operating modes of the driving member include different amplitude or frequency of reciprocating movement, or include various different movement rates.   
     
     
         3 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 1 , wherein
 the linear actuator includes an electrically driven linear actuator or an electrically heated linear actuator.   
     
     
         4 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 1 , wherein
 the reset unit includes an electrically driven linear actuator, an electrically heated linear actuator or an elastic member.   
     
     
         5 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 4 , wherein
 the reset unit is an elastic conductive member.   
     
     
         6 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 5 , wherein
 the elastic conductive member includes a metal spring or conductive rubber.   
     
     
         7 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 1 , characterized in that, the drug infusion device further comprising
 at least one blocking wall, wherein when the driving member is in contact with the blocking wall, the driving member stops rotating.   
     
     
         8 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 1 , the drug infusion device further comprising
 a base, wherein the driving wheel is movably assembled on the base, and the base and the driving wheel are frictional fit, and the driving wheel stops rotating when the driving end is sliding on a surface of the wheel teeth.   
     
     
         9 . The unilaterally driven drug infusion device with multiple infusion modes of  claim 8 , the drug infusion device further comprising
 a position limited member, which is movably assembled on the base to limit a position of the driving wheel, wherein the position limited member and the driving wheel are frictional fit, and the driving wheel stops rotating when the driving end is sliding on the surface of the wheel teeth.