Bilateral-driven patch-type drug infusion device
A bilateral-driven patch-type drug infusion device comprises: an infusion unit; a driving wheel drives the screw to move by rotation, pushing the piston forward; a driving unit—includes at least two driving portions, the driving unit pivots around a pivot shaft, driving different driving portions in different direction; and an infusion tube structure, which includes a base and an infusion needle, and the base includes an initial position (L), a working position (N), and an intermediate position (M). The driving unit can drive the driving wheel in two directions for infusion drug, making the infusion unit have multiple infusion modes, enhancing user experience.
1 . A bilateral-driven patch-type drug infusion device, comprising:
an infusion unit, comprising:
a drug storage unit provided with an opening for drug flowing;
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 to push the piston in the drug storage unit to move forward;
a driving unit cooperated with the driving wheel, the driving unit comprises at least two driving portions, the driving unit pivots around a pivot shaft to drive different driving portions of the at least two driving portions in different directions, thus pushing the wheel teeth located on different driving wheel respectively, and rotating the driving wheel; and
a power unit, connected to the driving unit, outputs two forces in two directions on the driving unit to make the driving unit pivot in two directions around the pivot shaft;
a housing, where the infusion unit is provided, includes a cavity providing with a first opening and a second opening, the opening of the drug storage unit is connected with the first opening, wherein the second opening is surrounded by an elastic seal;
an infusion tube structure, which comprises a base and an infusion needle fixedly arranged on the base, and the base comprises an initial position, a working position, and an intermediate position set between the initial position and the working position, wherein the base comprises a guide post, when the base is at the initial position, the base is fastened to the housing at a first position along the guide post, when the base is at the intermediate position, the base is fastened to the housing at a second position along the guide post, and when the base is at the working position, the base is fastened to the housing at a third position of the base;
an elastic member arranged on the base or the housing, and when the base is in the working position, the elastic member is compressed;
a fastening component, which comprises a first fastener and an auxiliary resilient component, wherein the first fastener is used to fasten the base to the housing at the first position or the second position; and
a second fastener is provided on the housing, after sliding the fastening component backward to release the base, the second fastener fastens the base at the third position,
wherein, by inserting the auxiliary resilient component into the housing, a position of the second fastener is changed, thereby releasing the base from the second fastener and returning the base to the intermediate position or the initial position from the working position,
the infusion needle comprises a front end and a subcutaneous end, both the front end and the subcutaneous end extend out of the base, wherein:
when the base is at the initial position, the front end is not communicated with the second opening;
when the base reaches the intermediate position, the front end pierces the elastic seal to communicate with the second opening, and the drug, along the cavity, flows from the drug storage unit to the subcutaneous end, to exhaust air in the cavity of the infusion needle.
2 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
the driving wheel comprises at least two sub-wheels.
3 . The bilateral-driven patch-type drug infusion device of claim 2 , wherein
the driving wheel comprises two sub-wheels, and the pivot shaft is disposed between the two sub-wheels, one or more of the driving portions are provided on both sides of the driving unit, and each sub-wheel is cooperated with each driving portion.
4 . The bilateral-driven patch-type drug infusion device of claim 3 , wherein
two driving portions are respectively provided on both sides of the driving unit, and the two driving portions on one side of the driving unit are disposed up and down or left and right.
5 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
the power unit comprises an electric-heated linear actuator or an electric-driven linear actuator.
6 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
the driving unit has a variety of different pivot amplitudes or pivot rates, and the infusion unit have a variety of different infusion increments or infusion rates.
7 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
the type of the first fastener comprises one or more of hooks, holes, blocks, or slots.
8 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
the elastic member is a spring arranged on the housing, and a part of the guide post is located in a hollow cavity of the spring.
9 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
a slider is provided on the fastening component while the housing is provided with a groove, the slider is arranged in the groove, and the slider can slide along the groove to make the fastening component fasten or release the base.
10 . The bilateral-driven patch-type drug infusion device of claim 1 , wherein
the fastening component further comprises at least one fastening arm, and the first fastener is provided on the fastening arm.