CN103599578B - A kind of handheld piezoelectric drives insulin pump - Google Patents

A kind of handheld piezoelectric drives insulin pump Download PDF

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Publication number
CN103599578B
CN103599578B CN201310641258.5A CN201310641258A CN103599578B CN 103599578 B CN103599578 B CN 103599578B CN 201310641258 A CN201310641258 A CN 201310641258A CN 103599578 B CN103599578 B CN 103599578B
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China
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pump
medicine
drug de
piezoelectric
valve block
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CN201310641258.5A
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Chinese (zh)
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CN103599578A (en
Inventor
刘国君
赵天
王浩
李新波
杨志刚
刘建芳
杨雪露
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吉林大学
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Abstract

The invention discloses a kind of handheld piezoelectric and drive insulin pump, include drug de-livery unit and ECU, ECU is integrated to be located in the pump housing of insulin pump, the drug de-livery unit that drug de-livery unit adopts connect-disconnect structure design to be plugged on the pump housing is installed in storehouse, drug de-livery unit controls work by ECU, drug de-livery unit and ECU provide electric power by a power supply, this power supply is located in the insulin pump pump housing, power supply is one No. seven high-energy batteries, beneficial effect: output accuracy is high; Overall mass is light, volume is little, injection of insulin precision is high, achieves integrated, miniaturization, lightweight, is convenient to patient and carries with, safety, reliable and convenient, is convenient to patient safety, fast operating.

Description

A kind of handheld piezoelectric drives insulin pump

Technical field

Patent of the present invention relates to a kind of insulin pump, and particularly a kind of handheld piezoelectric drives insulin pump.

Background technology

At present, in the therapeutic process of diabetes, continuous subcutaneous insulin injection (i.e. insulin pump in treatment) remains the optimum selection for the treatment of diabetes, this therapeutic modality is similar to as patient provides one " artificial pancreas ", simulate the pancreatic function intelligence of people, quantitatively to human body precise injection insulin, thus the blood sugar content in adjustment human body, compared with traditional treatment mode, obviously there is larger advantage.

Known by retrieval, what the current published insulin pump overwhelming majority adopted is that motor drives and the mode of screw-driven is injected, and not only precision is restricted, and volume is large, heaviness and cost is higher.

The patent No. be 03124182.4 " there is micro-membrane pump and the application thereof of two-way over-voltage protecting function " provide a kind of on-mechanical transmission, non-through type discharge, but with brake as drive source, the pumping diaphragm be arranged at below it is driven to pump, pump chamber inner volume is changed, and then reach from entrance suction liquid, the micro-membrane pump of the band pressure interlocking of liquid is got rid of from outlet, attempt for Micropump is applied to drug conveying, but it adopts actuator to drive, be subject to output pressure and the low restriction of output flow, so far practical application is not obtained.

As one of the representative products of piezoelectric actuator, driving type piezoelectric actuator Micropump (that is: piezoelectric pump) obtains in recent years and develops fast.Compared to the conventional pump utilizing motor or Electromagnetic Drive, piezoelectric pump is little with volume, high-performance, become the drug conveying Micropump being hopeful the marketization and commercialization most without the plurality of advantages such as electromagnetic interference, low energy consumption.

In " integrated precise medicine transportation pump " of the patent No. 200610016573.9, patent applicant once proposed piezoelectric micropump to be used for drug conveying first, and demonstrate piezoelectric micropump and can provide enough pressure and flow for drug conveying, demonstrate the important application prospect of piezoelectric micropump in the accurate conveying of medicine.But do not solve from the angle of system integrated, miniaturization, the Micropump that piezoelectric pump are really used for the rear whole system of insulin precision conveying and end a large amount of key technical problem such as property and overall performance stability.Therefore, simple a kind of high performance piezoelectric pump being really used for insulin pump in treatment system still has a large amount of problems to need to solve.

Summary of the invention

Main purpose of the present invention is that the insulin pump volume that existing employing motor drives and the mode of screw-driven carries out injecting is large, precision is not high in order to solve, heaviness and the higher problem of cost.

Another object of the present invention is to be applied on insulin pump by existing piezoelectric pump, makes insulin pump on the basis keeping whole aircraft reliability and stability, realize integrated, miniaturization, lightweight better.

The present invention is in order to achieve the above object, solves the problem and a kind of handheld piezoelectric that provides drives insulin pump.

Handheld piezoelectric of the present invention drives insulin pump to include drug de-livery unit and ECU, ECU is integrated to be located in the pump housing of insulin pump, the drug de-livery unit that drug de-livery unit adopts connect-disconnect structure design to be plugged on the pump housing is installed in storehouse, drug de-livery unit controls work by ECU, drug de-livery unit and ECU provide electric power by a power supply, this power supply is located in the insulin pump pump housing, and power supply is one No. seven high-energy batteries.

Drug de-livery unit is made up of medicine storehouse and piezoelectric pump, by pipeline communication between the inner chamber in medicine storehouse and piezoelectric pump, the medicine outlet of piezoelectric pump is communicated with injection union joint, can be connected with the medical needle tubing of standard configuration with syringe needle, the one end in medicine storehouse is provided with medicine outlet and medicine-pouring port, the inner space in medicine outlet and medicine-pouring port and medicine storehouse, the medicine outlet in medicine storehouse is communicated with the feeding opening of piezoelectric pump, the feeding opening of piezoelectric pump and the inner space of piezoelectric pump, the medicine-pouring port in medicine storehouse is communicated with the loading mouth on piezoelectric pump sidewall, medicine-pouring port on this another sidewall of loading mouth and piezoelectric pump is communicated with, the stifled sealing of one silica gel of medicine-pouring port on another sidewall of piezoelectric pump, the inside infusing insulin pump of silica gel is stung by micropin during injection, medicine storehouse and piezoelectric pump are combined in a housing, housing is made up of upper cover and base plate two parts, back-plane design has draw-in groove, location chamfering and slot electrode.

ECU is the circuit board being integrated with microcontroller and micro-control circuit, drug de-livery unit is connected with this circuit board, drug de-livery unit is worked by microprocessor controls, the shell of the insulin pump pump housing is provided with display screen and guidance panel, display screen is connected with the circuit board being integrated with microcontroller and micro-control circuit with guidance panel, guidance panel is provided with several button, and in order to control the associative operation of drug de-livery unit and ECU, display screen shows relevant operating parameter in real time.

Bottom inside front end, the installation storehouse groove plugging drug de-livery unit in the pump housing has an ejecting mechanism, this ejecting mechanism is fixed on to be installed in storehouse, by slide block, spring, connecting rod and positive stop spring plate composition, wherein the shape of slide block is corresponding with the shape of the location chamfering on drug de-livery unit Housing Base, connecting rod one end is connected in the bottom of slide block, the other end can slide in the chute on ejecting mechanism base plate, and be provided with a locked-up point in this chute, positive stop spring plate and slide block are fixed together and slide block synchronous slide, and it has a projection, the position of this projection is corresponding with the draw-in groove position on drug de-livery unit housing, ejecting mechanism base plate is also provided with metal clips, its position is corresponding with the position of drug de-livery unit housing top electrode groove.

Piezoelectric pump is by the first piezoelectric vibrator by piezoelectric pump, second piezoelectric vibrator, upper cavity, lower chamber, first valve block, second valve block and the 3rd valve block composition, wherein the first piezoelectric vibrator is located at the top of upper cavity, first valve block is located at the bottom of upper cavity, the bottom of upper cavity is provided with import and outlet, import is communicated with feeding opening, outlet is communicated with lower chamber, the side of the first valve block is provided with cantilever valve, this cantilever valve is located at upper cavity bottom inlet place, the opposite side of the first valve block is provided with port, this port is located at the exit bottom upper cavity, second piezoelectric vibrator is located at the bottom of lower chamber, the upper end of lower chamber is provided with import and outlet, import is communicated with upper cavity, outlet is communicated with medicine outlet, second valve block and the 3rd valve block superpose the upper end being located at lower chamber up and down, the side of the second valve block is provided with wheeled valve, the opposite side of the second valve block is provided with cantilever valve, the import of the corresponding lower chamber upper end of wheeled valve, the 3rd valve block corresponding position below wheeled valve is provided with port, the outlet of the corresponding lower chamber upper end of cantilever valve of the second valve block side, the 3rd valve block corresponding position below cantilever valve on second valve block is provided with port, one end face of piezoelectric pump is provided with electrode fitting groove, in electrode fitting groove, electrode is installed, the position of this electrode fitting groove is corresponding with the slot electrode position on drug de-livery unit housing, be placed in the sheet metal that the electrode on piezoelectric pump end face installs termination, storehouse through the slot electrode on drug de-livery unit Housing Base and drug de-livery unit to be connected.

Operation principle of the present invention is as described below:

Piezoelectric pump utilizes the of reciprocating vibration of piezoelectric vibrator in pump chamber, produce superpressure or negative pressure, utilizes check valve as fluid corrector simultaneously, finally realize the one-way flow of pump chamber inner fluid.And why piezoelectric pump is suitable for the precision conveying of medicine, an outstanding operating characteristic is that its delivery volume amount is good linear relationship with the quantity of pulse signal when voltage and operating frequency one timing.Utilize this service behaviour of piezoelectric pump, carry out by microcontroller the amount of insulin that the quantity of regulation output pulse and scalable piezoelectric pump pump.Simultaneously in conjunction with the different schemes for the treatment of diabetes, in ECU, implant corresponding control algolithm and multiple infusion of insulin program according to the normal physiological conditions of human body, thus realize the high accuracy infusion of insulin and the intelligent controlling of complete machine.

Beneficial effect of the present invention:

1, piezoelectric pump used is two chamber three valve type series voltage pumps, and its output pressure and flow more single chamber pump increase considerably, and restrained effectively the interference because output end pressure fluctuation produces, output accuracy is high; The pump body structure proposed relative to piezoelectric pump the present invention more than baroque three chambeies and three chambeies has clear superiority in whole aircraft reliability and stability.

2, the main body of piezoelectric pump all adopts the polymer with good biocompatibility and stability to make, and processing technique is simple, greatly reduces production cost, solves traditional insulin pump price high, the drawback that average family cannot be born economically.

3, piezoelectric pump and medicine storehouse are integrated in a housing and form a drug de-livery unit by the present invention, this drug de-livery unit is connected with the installation storehouse in the pump housing by PUSH-PUSH ejecting mechanism, ECU is integrated in pump body, display screen and programming operation button are arranged on the panel outside the pump housing for ease of use, compared with traditional insulin pump, overall mass is light, volume is little, injection of insulin precision is high, achieves integrated, miniaturization, lightweight, is convenient to patient and carries with.

4, as core of the present invention, drug de-livery unit and other parts of complete machine can realize quick plug-in and install, simple to operate, quick.Meanwhile, drug de-livery unit structure is simple, cost of manufacture is low, has possessed disposable condition, and what ensure that when the operation of Piezoelectric Driving insulin pump uses is safe, reliable and convenient.

5, accurately control the infusion amount of insulin using processor STM32 as the ECU of master controller by controlling different number of pulses, and containing friendly operation interface and intelligent programing system, be convenient to patient safety, fast operating.

Accompanying drawing explanation

Fig. 1 is the drug de-livery unit scheme of installation of Piezoelectric Driving insulin pump of the present invention.

Fig. 2 is Piezoelectric Driving insulin pump decomposition texture schematic diagram of the present invention.

Fig. 3 is drug de-livery unit decomposition texture schematic diagram of the present invention.

Fig. 4 is that drug de-livery unit of the present invention installs chamber structure schematic diagram.

Fig. 5 is the decomposition texture schematic diagram of piezoelectric pump of the present invention.

Fig. 6 is the operation principle schematic diagram of piezoelectric pump of the present invention.

Fig. 7 is microcontroller of the present invention and micro-control circuit design block diagram.

1, drug de-livery unit 2, renovate 3, the insulin pump pump housing 4, guidance panel

5, display screen 6, pump housing upper casing 7, ECU 8, upper cover

9, injection union joint 10, piezoelectric pump 11, base plate 12, ejecting mechanism

13, storehouse installed by battery cover 14, battery 15, pump housing lower casing 16, battery

17, drug de-livery unit is installed storehouse 18, medicine storehouse 19, is connected bearing pin 20, medicine-pouring port

21, medicine outlet 22, guide channel 23, draw-in groove 24, location chamfering 25, slot electrode

26, medicine outlet 27, connecting rod 28, slide block 29, spring 30, metal clips

31, positive stop spring plate 32, first piezoelectric vibrator 33, first valve block 33A, cantilever valve

33B, port 34, the pump housing 35, feeding opening 36, loading mouth 37, second piezoelectric vibrator

38, the 3rd valve block 38A, port 38B, port 39, second valve block 39A, wheeled valve

39B, cantilever valve 40, silica gel are stifled 41, medicine-pouring port 42, electrode fitting groove

43, electrode 44, import 45, lower chamber 46, import 47, upper cavity

48, cavity communicating passage 49, outlet 50, outlet up and down.

Detailed description of the invention

Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7:

Handheld piezoelectric of the present invention drives insulin pump to include drug de-livery unit 1 and ECU 7, ECU 7 is integratedly located in the insulin pump pump housing 3, drug de-livery unit 1 drug de-livery unit that can be plugged in the pump housing 3 of insulin pump is installed in storehouse 17, drug de-livery unit 1 controls work by ECU 7, drug de-livery unit 1 and ECU 7 provide electric power by a power supply, this power supply is located in the pump housing lower casing 15 of insulin pump, power supply is No. seven high-energy batteries 14, after battery 14 being arranged on battery installation storehouse 16, namely can be insulin pump after screwing in battery cover 13 and electric power is provided.Drug de-livery unit 1 can install replacement by quick plug-in, the mode of a complete machine multiple drug de-livery unit 1 is taked during use, when the insulin medicinal liquid in a drug de-livery unit 1 is finished, is installed by quick plug-in and change another new drug de-livery unit 1, convenient to operation.Renovating 2 to be connected with the pump housing upper casing 6 of insulin pump by connecting bearing pin 19, connecting bearing pin 19 and being located on the pump housing upper casing 6 of insulin pump, renovating 2 and be shaped with elongate holes, thus ensure that renovating 2 can overturn and slide in certain angle; After drug de-livery unit 1 being pushed drug de-livery unit installation storehouse 17, close and renovate 2, then upwardly renovate 2 to make to renovate in two lockholes reserved on the pump housing lower casing 15 of two boss insertion insulin pumps that 2 bottom inside are reserved, thus will renovate extremely 2-in-1.

Drug de-livery unit 1 is made up of medicine storehouse 18 and piezoelectric pump 10, by pipeline communication between the inner chamber in medicine storehouse 18 and piezoelectric pump 10, medicine outlet 26 on piezoelectric pump 10 is communicated with injection union joint 9, injection union joint 9 can be connected with the medical needle tubing of standard configuration with syringe needle, the one end in medicine storehouse 18 is provided with medicine outlet 21 and medicine-pouring port 20, the inner space in medicine outlet 21 and medicine-pouring port 20 and medicine storehouse 18, the medicine outlet 21 in medicine storehouse 18 is communicated with the feeding opening 35 of piezoelectric pump 10, the feeding opening 35 of piezoelectric pump 10 and the inner space of piezoelectric pump 10, the medicine-pouring port 20 in medicine storehouse 18 is communicated with the loading mouth 36 on piezoelectric pump 10 sidewall, this loading mouth 36 is communicated with the medicine-pouring port 41 on another sidewall of piezoelectric pump 10, stifled 40 sealings of a silica gel of medicine-pouring port 41 on another sidewall of piezoelectric pump 10, the inside infusing insulin pump of silica gel is stung by micropin during injection, medicine storehouse 18 and piezoelectric pump 10 are combined in a housing, this housing is made up of upper cover 8 and base plate 11 two parts, base plate 11 is provided with guide channel 22, draw-in groove 23, location chamfering 24 and slot electrode 25.

ECU 7 is for being integrated with the circuit board of microcontroller and micro-control circuit, drug de-livery unit 1 is connected with this circuit board, drug de-livery unit 1 is worked by microprocessor controls, pump housing upper casing 6 is provided with display screen 5 and guidance panel 4, display screen 5 is connected with the circuit board being integrated with microcontroller and micro-control circuit with guidance panel 4, guidance panel 4 is provided with several button, in order to control the associative operation of drug de-livery unit 1 and ECU 2, display screen shows relevant operating parameter in real time, adopt ARM series processors STM32 as microcontroller, infusion flow is accurately controlled by the voltage and frequency that control piezoelectric pump 10.When insulin pump uses, according to the specific physiological conditions of human body, setting average minute clock secretion basal infusion rate (this work is preset according to the blood glucose value of Clinical detection by department of endocrinology doctor, for controlling night, empty stomach and preprandial glucose concentration) once; Meanwhile, when breakfast, lunch and dinner according to dining amount and food species, inject bolus insulin before the meal, control post-prandial glycemia.User carries out necessary operation by button, and operation information will be shown by OLED display screen 5, and friendly interface is easy and simple to handle, there is buzzer prompting and warning function, during normal work, system is in resting state, saves electricity to greatest extent, has the function that power down is preserved simultaneously.

The bottom inside front end groove that drug de-livery unit installs storehouse 17 has an ejecting mechanism 12, this ejecting mechanism 12 is fixed on drug de-livery unit and installs in storehouse 17, by slide block 28, spring 29, connecting rod 27 and positive stop spring plate 31 form, wherein the shape of slide block 28 is corresponding with the shape with the location chamfering 24 on the Housing Base 11 of drug de-livery unit 1, connecting rod 27 one end is connected in the bottom of slide block 28, the other end can slide in the base plate chute of ejecting mechanism 12, and have a locked-up point in this chute, positive stop spring plate 31 and slide block 28 are fixed together can with slide block 28 synchronous slide, and it has a projection, the position of this projection is corresponding with draw-in groove 23 position on the housing of drug de-livery unit 1.In addition, the base plate of ejecting mechanism 12 is also provided with metal clips 30, its position is corresponding with the position of the housing top electrode groove 25 of drug de-livery unit 1, the quick plug-in achieving drug de-livery unit 1 under the cooperation of the shell mechanism of ejecting mechanism 12 and drug de-livery unit 1 is installed, specific works principle is: when drug de-livery unit 1 pushes to drug de-livery unit installation storehouse 17 by first time, drug de-livery unit 1 enters drug de-livery unit smoothly and installs in storehouse 17 under the effect of guide channel 22, continue to be pushed forward into when being pushed to location chamfering 24 and contacting with slide block 28, spring 29 is compressed and pulls connecting rod 27 and positive stop spring plate 31, until the draw-in groove 23 that the projection on positive stop spring plate 31 enters on drug de-livery unit shell positions, now the locked-up point that is also just pulled in chute of connecting rod 27 root is locked by mechanicalness, drug de-livery unit 1 completes Fast Installation and electrode bottom it contacts to compress with the metal clips 30 be arranged on ejecting mechanism 12 base plate and connects, drug de-livery unit 1 and ECU 7 are connected, when driven forward drug de-livery unit 1 again, the sliding end of connecting rod 27 skids off from locked-up point, return to initial position under the action of a spring 29, drive coupled slide block 28 outwards to move simultaneously, and drug supply unit 1 one thrust, thus drug de-livery unit 1 is installed ejection in storehouse 17 from drug de-livery unit.

Piezoelectric pump 10 is by the first piezoelectric vibrator 32, second piezoelectric vibrator 37, upper cavity 47, lower chamber 45, first valve block 33, second valve block 39 and the 3rd valve block 38 form, wherein the first piezoelectric vibrator 32 is located at the top of upper cavity 47, first valve block 33 is located at the bottom of upper cavity 47, the bottom of upper cavity 47 is provided with import 46, this import 46 is communicated with feeding opening 35, the bottom of upper cavity 47 is provided with outlet 49, this outlet 49 is communicated with lower chamber 45 by upper and lower cavity communicating passage 48, the side of the first valve block 33 is provided with cantilever valve 33A, this cantilever valve 33A is located at upper cavity 47 bottom inlet 46 place, the opposite side of the first valve block 33 is provided with port 33B, this port 33B is located at outlet 49 place bottom upper cavity 47, second piezoelectric vibrator 37 is located at the bottom of lower chamber 45, the upper end of lower chamber 45 is provided with import 44, this import 44 is communicated with upper cavity 47 by upper and lower cavity communicating passage 48, the upper end of lower chamber 45 is also provided with outlet 50, this outlet 50 is communicated with medicine outlet 26, second valve block 39 and the superposition of the 3rd valve block about 38 are located at the upper end of lower chamber 45, the side of the second valve block 39 is provided with wheeled valve 39A, the opposite side of the second valve block 39 is provided with cantilever valve 39B, import 44 place of corresponding lower chamber 45 upper end of wheeled valve 39A, the 3rd valve block 38 corresponding position below wheeled valve 39A is provided with port 38A, outlet 50 place of corresponding lower chamber 45 upper end of cantilever valve 39B of the second valve block 39 side is arranged, the 3rd valve block 38 corresponding position below cantilever valve 39B on second valve block 39 is provided with port 38B, one end face of the pump housing 34 of piezoelectric pump is provided with electrode fitting groove 42, electrode 43 is installed in electrode fitting groove 42, the position of this electrode 43 is corresponding with housing top electrode groove 25 position of drug de-livery unit 1, be placed in the metal clips 30 that the electrode 43 on piezoelectric pump 10 end face installs termination, storehouse 17 through the slot electrode 25 on the base plate 11 of drug de-livery unit 1 housing and drug de-livery unit to be connected.

The specific works principle of piezoelectric pump 10 is: when the first piezoelectric vibrator 32 is bent upwards distortion, upper cavity 47 volume becomes large, cause producing negative pressure in upper cavity 47, when its absolute value is greater than the threshold opening pressure value of the first valve block 33, first valve block 33 is opened, second valve block 39 wheeled valve 39A on one side keeps closed condition, and insulin medicinal liquid flows into the upper cavity 47 of piezoelectric pump 10 in medicine storehouse 18 through feeding opening 35; While the first piezoelectric vibrator 32 is bent upwards distortion, the second piezoelectric vibrator 37 is also bent upwards distortion, the volume in lower chamber 45 is caused to reduce, produce malleation, when the threshold opening pressure value of the malleation absolute value in lower chamber 45 more than the cantilever valve 39B of the second valve block 39 another side, the cantilever valve 39B of the second valve block 39 another side opens, second valve block 39 wheeled valve 39A on one side keeps closing, and insulin medicinal liquid is pumped by piezoelectric pump 10 and injects in human body through needle tubing; In rear half period, first piezoelectric vibrator 32 is bent downwardly distortion, the volume of upper cavity 47 diminishes, produce malleation, first valve block 33 is closed, second valve block 39 wheeled valve 39A on one side opens, second piezoelectric vibrator 37 is also bent downwardly distortion simultaneously, lower chamber 45 volume becomes large, produce negative pressure, the second valve block 39 wheeled valve 39A on one side as its inlet valve opens, and the cantilever valve 39B as the second valve block 39 another side of its outlet valve closes, and now insulin medicinal liquid is just transported to lower chamber 45 by upper cavity 47.By the first piezoelectric vibrator 32 and the reciprocal upper and lower bending vibration of the second piezoelectric vibrator 37, the volume of upper cavity 47 and lower chamber 45 constantly increases and reduces, thus complete insulin medicinal liquid and be constantly inhaled into from the feeding opening 35 of piezoelectric pump 10, from the continuous operation process that medicine outlet 26 is pumped out.

First valve block 33 is compound on same substrate by cantilever valve 33A and port 33B to form, and structure is simple and be convenient to assemble centering.

Second valve block 39 is compound in by wheeled valve 39A and cantilever valve 39B the combination valve that same substrate is formed, second valve block 39 coordinates with the 3rd valve block 38 in two holes is stacked the function realizing intermediate valve and outlet valve, simultaneously, use this combination valve structure, cut-off, the stability of piezoelectric pump 10 are all greatly improved.

The material selection SU-8 of the first valve block 33, second valve block 39 and the 3rd valve block 38 makes; The pump housing of piezoelectric pump 10 selects medical grade PMMA to complete.

Claims (2)

1. a handheld piezoelectric drives insulin pump, include drug de-livery unit and ECU, ECU is integrated to be located in the insulin pump pump housing, the drug de-livery unit that drug de-livery unit adopts plug-in structural design to be plugged on the pump housing is installed in storehouse, drug de-livery unit controls work by ECU, drug de-livery unit and ECU provide electric power by a power supply, described drug de-livery unit is made up of medicine storehouse and piezoelectric pump, by pipeline communication between the inner chamber in medicine storehouse and piezoelectric pump, the medicine outlet of piezoelectric pump is communicated with injection union joint, can be connected with the medical needle tubing of standard configuration with syringe needle, the one end in medicine storehouse is provided with medicine outlet and medicine-pouring port, the inner space in medicine outlet and medicine-pouring port and medicine storehouse, the medicine outlet in medicine storehouse is communicated with the feeding opening of piezoelectric pump, the feeding opening of piezoelectric pump and the inner space of piezoelectric pump, the medicine-pouring port in medicine storehouse is communicated with the loading mouth on piezoelectric pump sidewall, medicine-pouring port on this another sidewall of loading mouth and piezoelectric pump is communicated with, the stifled sealing of one silica gel of medicine-pouring port on another sidewall of piezoelectric pump, the inside infusing insulin pump of silica gel is stung by micropin during injection, medicine storehouse and piezoelectric pump are combined in a housing, housing is made up of upper cover and base plate two parts, base plate is designed with guide channel, draw-in groove, location chamfering and slot electrode, it is characterized in that: the bottom inside front end groove that described drug de-livery unit installs storehouse has an ejecting mechanism, this ejecting mechanism is fixed on to be installed in storehouse, mainly by slide block, spring, connecting rod and positive stop spring plate form, wherein the shape of slide block is corresponding with the shape of the location chamfering on drug de-livery unit Housing Base, connecting rod one end is connected in the bottom of slide block, the other end can slide in the chute on ejecting mechanism base plate, and have a locked-up point in this chute, positive stop spring plate and slide block are fixed together and slide block synchronous slide, and it has a projection, the position of this projection is corresponding with the draw-in groove position on drug de-livery unit housing, ejecting mechanism base plate is also provided with metal clips, its position is corresponding with the position of drug de-livery unit housing top electrode groove.
2. a kind of handheld piezoelectric according to claim 1 drives insulin pump, it is characterized in that: described piezoelectric pump is by the first piezoelectric vibrator, second piezoelectric vibrator, upper cavity, lower chamber, first valve block, second valve block and the 3rd valve block composition, wherein the first piezoelectric vibrator is located at the top of upper cavity, first valve block is located at the bottom of upper cavity, the bottom of upper cavity is provided with import and outlet, import is communicated with feeding opening, outlet is communicated with lower chamber, the side of the first valve block is provided with cantilever valve, this cantilever valve is located at upper cavity bottom inlet place, the opposite side of the first valve block is provided with port, this port is located at the exit bottom upper cavity, second piezoelectric vibrator is located at the bottom of lower chamber, the upper end of lower chamber is provided with import and outlet, import is communicated with upper cavity, outlet is communicated with medicine outlet, second valve block and the 3rd valve block superpose the upper end being located at lower chamber up and down, the side of the second valve block is provided with wheeled valve, the opposite side of the second valve block is provided with cantilever valve, the import of the corresponding lower chamber upper end of wheeled valve, the 3rd valve block corresponding position below wheeled valve is provided with port, the outlet of the corresponding lower chamber upper end of cantilever valve of the second valve block side, the 3rd valve block corresponding position below cantilever valve on second valve block is provided with port, one end face of piezoelectric pump is provided with electrode fitting groove, in electrode fitting groove, electrode is installed, the position of this electrode fitting groove is corresponding with the slot electrode position on drug de-livery unit housing, be placed in the sheet metal that the electrode on piezoelectric pump end face installs termination, storehouse through the slot electrode on drug de-livery unit Housing Base and drug de-livery unit to be connected.
CN201310641258.5A 2013-12-03 2013-12-03 A kind of handheld piezoelectric drives insulin pump CN103599578B (en)

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2865705Y (en) * 2006-01-27 2007-02-07 吉林大学 Integrated precision medicine supply pump
CN101608610A (en) * 2008-06-20 2009-12-23 微创医疗器械(上海)有限公司 A kind of micropump
CN101634291A (en) * 2008-07-23 2010-01-27 微创医疗器械(上海)有限公司 Control system and control method for output liquid amount of pump
CN101632847B (en) * 2008-07-25 2012-11-21 微创医疗器械(上海)有限公司 Medical injection pump
CA2679806A1 (en) * 2008-09-30 2010-03-30 Animas Corporation Medical device mechanical pump
CN203564606U (en) * 2013-12-03 2014-04-30 吉林大学 Portable piezoelectric driving insulin pump

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