Portable full-throwing type trace injection pump

Abstract

The invention relates to a portable full-throwing type trace injection pump which comprises a shell, a medicine storage cylinder, a medicine pushing device, an injection device, a driving device and a power supply module, a piston is arranged in the medicine storage cylinder and connected with the medicine pushing device, the medicine pushing device is connected with the driving device, the power supply module is electrically connected with the driving device, and a medicine outlet is formed in the outer side of one end of the medicine storage cylinder. The medicine outlet is connected with a medicine inlet of an injection device through a connecting pipe, a sealing assembly is arranged between the medicine outlet and the medicine storage cylinder, and an application is fixedly arranged on the outer side of the cover plate. The injection pump is small and exquisite in overall structure, portable, capable of being adhered to the body of a patient during use, high in concealment, capable of being thrown after being used, convenient to use, easy to operate, safe, reliable, free of influence on movement of the patient during use, capable of achieving rapid injection anytime and anywhere, high in injection precision, capable of reducing discomfort of the patient and capable of greatly improving the living quality of the patient.

Description

Technical Field

[0001] The present invention relates to a micro-injection pump, in particular to a portable disposable micro-injection pump, belonging to the technical field of medical devices. Background Art

[0002] The injection pump accurately, microscopically, uniformly and continuously injects the liquid medicine into the body, and can meet the frequent injection of corresponding medicines for a long time to keep the body in a stable and healthy state, so it has been widely used. At present, most existing injection pumps require a series of operations for users to open the pump door, install the syringe, engage the push handle of the syringe with the pushing device, and manually turn on the machine before injecting the medicine. The operation is cumbersome and time-consuming, and it is not convenient to perform rapid injection. In addition, during the installation process of the syringe, improper operation will cause the medicine in the syringe to flow out, reducing the injection accuracy of the liquid medicine and the infusion safety. In addition, most existing injection pumps are relatively large in overall volume, heavy in structure, inconvenient to carry, and cannot perform rapid injection anytime and anywhere according to user needs. Summary of the Invention

[0003] In order to overcome the defects and deficiencies in the above background art, the purpose of the present invention is to provide a portable disposable micro-injection pump that is convenient to use and does not affect the activities of patients.

[0004] To achieve the above purpose, the present invention provides a portable disposable micro-injection pump, which includes a housing, a medicine storage cylinder, a medicine pushing device, an injection device, a driving device and a power supply module. A cover plate is provided at the top opening of the housing, and the cover plate and the housing enclose the inner cavity of the housing. The medicine storage cylinder, the driving device, the medicine pushing device and the power supply module are arranged in the inner cavity of the housing. A piston is arranged in the medicine storage cylinder, and the piston is connected to the medicine pushing device. The medicine pushing device is connected to the driving device to drive the medicine pushing device to push out the liquid medicine in the medicine storage cylinder. The power supply module is electrically connected to the driving device to supply power to the driving device. An outlet is arranged on the outer side of the end of the medicine storage cylinder far from the medicine pushing device and is communicated with the inner cavity of the medicine storage cylinder. The outlet is connected to the inlet of the injection device through a connecting pipe. A sealing component is arranged between the outlet and the medicine storage cylinder. A dressing is fixedly arranged on the outer side of the cover plate.

[0005] Preferably, the medicine storage cylinder, the medicine pushing device and the driving device are located on one side of the bottom plate of the housing, the power supply module is located on the other side of the bottom plate of the housing and is arranged close to the driving device, the injection device is located in the middle of the bottom plate of the housing, the housing is made of plastic, and an integral structure of a partition plate and a clamping block is arranged on the inner wall of the housing to limit the clamping of the medicine storage cylinder, the medicine pushing device, the driving device and the power supply module.

[0006] Preferably, a pipetting device is detachably provided on the outer side of the housing, and the pipetting device is mounted on the housing through a mounting base.

[0007] Preferably, the pipetting device includes a pipetting needle and a pipetting needle seat. The pipetting needle seat is snap-connected to the mounting base. The pipetting needle is arranged on the pipetting needle seat. One end of the pipetting needle extends into the housing through a pipetting needle hole formed in the side plates of the mounting base and the housing, and the other end is located in the pipetting needle seat. A pressing rod is fixedly arranged on the pipetting needle seat. The end of the pressing rod away from the pipetting needle seat passes through a pressing rod hole formed in the housing for the pressing rod to pass through, and its end face presses against the sealing assembly.

[0008] Preferably, the two sealing assemblies include a sealing chamber provided on the liquid storage cylinder. The sealing chamber corresponds to the pipetting needle hole formed in the housing. A liquid passing hole communicating with the inner cavity of the medicine storage cylinder and a pipetting hole corresponding to the needle hole are formed therein. A sealing block is arranged in the sealing chamber to seal the liquid passing hole and the pipetting hole.

[0009] Preferably, the injection device includes a guiding steel needle, an indwelling hose, and a steel needle handle. The guiding steel needle is fixed on the steel needle handle. The steel needle handle is located outside the housing and is detachably connected to the bottom plate of the housing. A support base is fixedly arranged at the position corresponding to the steel needle handle on the bottom plate. The support base is in a stepped shape. An outer fixing seat is arranged on the support base. A fixing cylinder adapted to the outer fixing seat is arranged outside the outer fixing seat. The top end of the fixing cylinder is fixed on the cover plate. After the cover plate is fixed to the housing, the bottom end of the fixing cylinder presses against the support base to limit the outer fixing cylinder. The top of the support base extends into the inner cavity of the outer fixing seat. A sealing cushion plate is arranged on the top surface of the support base. A guiding seat is arranged on the sealing cushion plate. An inner fixing seat is arranged outside the guiding seat. A guiding tube and the indwelling hose are arranged on the top of the inner fixing seat. The guiding tube is sleeved inside the indwelling hose. The needle tip of the guiding steel needle sequentially passes through the support base, the sealing cushion plate, the guiding seat, the inner fixing seat, and the guiding tube from the outside of the housing and extends out of the indwelling hose. Liquid medicine inlets are arranged on both the inner and outer fixing seats. The connecting tube passes through the liquid medicine inlet formed in the outer fixing seat and is connected to the liquid medicine inlet formed in the inner fixing seat, so that the liquid medicine enters the indwelling hose from the medicine storage cylinder through the connecting tube and the inner fixing seat.

[0010] Preferably, the power supply module includes a button battery and an electromagnetic switch. The button battery is arranged in a battery holder, and both the battery holder and the electromagnetic switch are mounted on a circuit board disposed on the inner wall of the bottom plate of the housing. The battery holder is electrically connected to the micro-motor of the driving device to supply power to the micro-motor. Through holes are respectively formed in the cover plate and the patch corresponding to the electromagnetic switch. The electromagnetic switch is connected in the circuit formed by the micro-motor and the button battery to switch on and off the circuit. A magnet is fixedly arranged in the packaging box outside the portable disposable micro-injection pump corresponding to the through hole. Under the magnetic force of the magnet, the electromagnetic switch is in an off state. When the injection pump is taken out of the packaging box, the electromagnetic switch is in a closed state to connect the circuit of the micro-motor and the button battery.

[0011] Preferably, the driving device includes a micro-motor and a reduction gearbox. The output end of the micro-motor is connected to the input end of the reduction gearbox, and the output end of the reduction gearbox is connected to the power input end of the medicine pushing device to provide power for the medicine pushing device.

[0012] Preferably, the portable disposable micro-injection pump further includes a detection module, a control module, and a communication module. The detection module is used to detect the distance of the piston advancement and transmit the measured signal to the control module. The control module processes the signal transmitted by the detection module to control the start and stop of the micro-motor. The communication module communicates with a remote control terminal to achieve remote control, and can be remotely managed and controlled through a mobile device or a computer connected to the injection pump. The detection unit includes a counting optocoupler, which is arranged at one end of the micro-motor away from its output end and coaxially arranged with the power shaft of the micro-motor.

[0013] Preferably, the medicine pushing device includes a push rod and a lead screw. The push rod is of a hollow structure, and a lead screw sleeve adapted to the lead screw is fixedly arranged therein. One end of the push rod is fixedly connected to the piston. One end of the lead screw is connected to the reduction gearbox, and the other end is located inside the push rod. The lead screw is sleeved in the lead screw sleeve and forms a screw pair with the lead screw sleeve.

[0014] Compared with the prior art, the present invention has the following technical effects: 1. The medicine storage cylinder, the medicine pushing device, the driving device and the power supply module of the present invention are all arranged inside the housing. The medicine storage cylinder and the medicine pushing device are arranged on one side of the housing, the driving device is arranged at the bottom of the medicine pushing device, the power supply module is located on the other side of the housing and is arranged close to the driving device, and the injection device is arranged in the middle of the housing. The layout is reasonable, the overall structure is compact, the inner cavity space of the housing is fully utilized, the installation space inside the housing is greatly saved, the volume of the housing is reduced, and then the volume of the injection pump of the present invention is reduced. The injection pump of the invention is small in volume and convenient to carry, and is adhered to the patient's body by a patch, which is convenient to use and does not affect the patient's activities. Moreover, such a layout can also shorten the distance between the medicine storage cylinder and the injection device, thereby shortening the length of the connecting tube, and the inner diameter of the connecting tube is small, which can effectively reduce the residual liquid medicine and avoid waste. At the same time, an indwelling hose is provided, which can not only avoid the pain brought to the patient by multiple injections, but also be pasted on the body and injected at any time according to needs, with free movement and convenient use, greatly improving the quality of life of the patient; 2. The housing and the cover plate of the present invention are injection molded parts, and the housing and the cover plate are snapped together. In addition, an integrally formed partition and buckle are arranged inside the housing to fix and limit the medicine storage cylinder, the medicine pushing device, the driving device and the power supply module, which is convenient for assembly and also reduces the processing cost. In addition, the outer fixing seat of the injection device is fixed and limited through a fixing cylinder integrally formed with the cover plate, which can ensure the stability of the injection device and is also convenient for assembly. The self-structures of the housing and the cover plate are fully utilized to limit and fix the components inside, without using other additional components for fixation, which is convenient for assembly, reduces the processing cost, and also reduces the weight of the whole machine, which is beneficial to the lightweight and miniaturization of the whole machine; 3. When using the micro-injection pump of the present invention for drug injection, the patient sets the injection volume at the remote control end, loads the liquid medicine into the medicine storage cylinder by using a pipetting device, removes the pipetting needle and the empty medicine bottle, punctures the indwelling hose into the patient's skin by using a guiding steel needle, and after adjusting the angle and position, adheres the injection pump to the patient's body by using a patch. The operation is simple and easy to operate, improving the usability of the injection pump of the invention; 4. The micro-injection pump of the present invention detects the advancing distance of the piston through a detection module, which has higher accuracy than the method of controlling the motor rotation speed in the prior art. Moreover, the cooperation of the detection module and the control module can feedback the phenomenon of the motor idling, and there will be no situation of no drug injection due to the motor idling, improving the use safety of the injection pump; 5. The present invention drives the lead screw to rotate through the cooperation of the lead screw and the lead nut, and drives the lead nut and the piston fixed on the lead nut to move, which is convenient for adjusting the injection speed and the injection volume; 6. The electromagnetic switch of the portable disposable micro-injection pump of the present invention cooperates with the magnet in the fixed packaging box, so that the injection pump is in a power-off state in the packaging box, saving the power of the power supply module and extending its service life; when in use, taking out the injection pump from the packaging box, the electromagnetic switch contacts the magnetic force of the magnet, connecting the circuit and automatically turning on the machine, without manual startup, which is convenient to use; 7. The present invention facilitates loading the liquid medicine into the syringe barrel by setting a liquid transfer device, eliminating the need to use an additional syringe for loading medicine, which is convenient for patients. Additionally, by setting a sealing device, the medicine outlet of the medicine storage barrel is in a sealed state during medicine loading, preventing the liquid medicine from flowing out during loading, avoiding waste, and saving the usage cost for patients; 8. The injection device of the present invention fixes the indwelling hose through the inner and outer nested fixing seats, with a reasonable overall design, simple and compact structure, and easy to assemble. In addition, the top of the inner fixing seat is located inside the needle sleeve of the indwelling hose, which can effectively reduce the volume of the inner cavity of the needle sleeve, thereby reducing the drug residue, minimizing the waste of liquid medicine, and reducing the medical cost for patients; 9. The present invention can guide the steel needle to accurately insert into the indwelling hose during assembly by setting a metal guide seat inside the inner fixing seat of the injection device and a metal guiding cylinder between the outside of the inner fixing seat and the indwelling hose, preventing the guiding steel needle from piercing into the inner fixing seat and damaging the needle tip, and also preventing the needle tip from piercing the indwelling hose and causing product scrapping, ensuring product quality and stable product quality; 10. In summary, the whole machine of the portable disposable micro-injection pump of the present invention is small and portable. When in use, it can be adhered to the patient's body, with strong concealment, low cost, disposable after use, convenient to use, simple and safe to operate, and does not affect the patient's activities during use, allowing the patient to move freely. When injection is needed, just operate the switch at the control end, enabling rapid injection anytime and anywhere, with high injection accuracy, reducing the discomfort of the patient, and greatly improving the patient's quality of life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings forming a part of this specification are used to further understand the present invention and show the preferred embodiments of the present invention, and are used together with the specification to explain the principle of the present invention. In the figures: Figure 1 is the structural schematic diagram of the portable disposable micro-injection pump of the present invention; Figure 2 is the top view structural schematic diagram of the portable disposable micro-injection pump of the present invention; Figure 3 is the structural schematic diagram of the housing and liquid transfer device of the portable disposable micro-injection pump of the present invention; Figure 4 is the structural schematic diagram of the portable disposable micro-injection pump with the dressing and cover removed; Figure 5It is a schematic explosion structure diagram of an invented portable fully disposable micro-injection pump; Figure 6 It is Figure 2 The schematic structure diagram of A-A in

[0016] The meanings represented by the reference numerals in the figure are as follows: 1. Housing; 2. Injection device, 21. Sealing backing plate, 22. Guide seat, 23. Inner fixing seat, 24. Guide tube, 25. Indwelling hose, 26. Outer fixing seat, 27. Liquid medicine inlet, 28. Guide steel needle, 29. Steel needle handle; 3. Cover plate, 4. Dressing, 5. Driving device, 51. Micro motor, 52. Reduction gearbox; 6. Power supply module, 61. Battery holder, 62. Electromagnetic switch, 63. Battery, 64. Circuit board; 7. Medicine pushing device, 71. Push rod, 72. Threaded sleeve, 73. Lead screw; 8. Liquid transfer device, 81. Liquid transfer needle, 82. Liquid transfer needle seat, 83. Pressing rod, 84. Pressing rod hole, 85. Liquid transfer needle hole; 9. Medicine storage cylinder, 10. Piston, 11. Connecting pipe, 12. Support base, 13. Through hole for accommodating magnet, 14. Medicine outlet, 15. Mounting seat; 16. Sealing assembly, 161. Sealing chamber, 162. Sealing block; 17. Clamping block, 18. Fixed cylinder, 19. Counting optocoupler. Specific embodiments

[0017] The following will describe in detail the embodiments of the present invention with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the claims.

[0018] It should be noted that the terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used in the present invention, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in the present invention, they indicate the presence of features, devices, components and / or combinations thereof.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "bottom", "top", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0020] In addition, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Embodiment: As Figure 1 , 2 , 3 and Figure 4 shown, the portable fully disposable micro-injection pump provided in this embodiment includes a housing 1, a medicine storage cylinder 9, a medicine pushing device 7, a driving device 5, a power supply module 6, and an injection device 2. The housing 1 is an injection molded part with one end closed and the other end open. A cover plate 3 is provided at the top opening of the housing 1. The cover plate 3 and the housing 1 enclose the inner cavity of the housing 1. Similarly, the cover plate 3 is also an injection molded part, and the cover plate 3 is snap-connected to the housing 1. The medicine storage cylinder 9, the medicine pushing device 7, the driving device 5, and the power supply module 6 are arranged in the inner cavity of the housing 1. The cross-section of the medicine storage cylinder 9 is a rectangle with rounded corners at four corners. A piston 10 is arranged in the medicine storage cylinder 9. The piston 10 is connected to the medicine pushing device 7. The shape of the piston 10 is adapted to the shape of the inner cavity of the medicine storage cylinder 9. A sealing groove for installing a sealing ring is arranged on the piston 10, and a sealing ring is installed in the sealing groove to ensure the sealing between the piston and the inner wall of the medicine storage cylinder 9. The medicine in the medicine storage cylinder 9 is pushed out by the medicine pushing device 7 pushing the piston 10. The medicine pushing device 7 is connected to the driving device 5 to drive the medicine pushing device 7 to push the medicine in the medicine storage cylinder 9 out. The power supply module 6 is electrically connected to the driving device 5 to supply power to the driving device. An outlet 14 communicating with the inner cavity of the medicine storage cylinder 9 is arranged on the outer side of the end of the medicine storage cylinder 9 far from the medicine pushing device 7. The outlet 14 is connected to the inlet of the injection device 2 through a connecting pipe 11. A sealing assembly 16 is arranged between the outlet 14 and the medicine storage cylinder 9. A patch 4 is fixedly arranged on the outer side of the cover plate 3. The patch 4 is used to stick on the patient's body. The patch 4 is fixed on the outer surface of the cover plate 3 by bonding or hot melting. In other embodiments, the patch 4 can be a plastic soft sheet, and the plastic soft sheet is fixed on the outer side of the cover plate 3 by hot melting, and the other side is coated with adhesive and covered with release paper. In this embodiment, the patch 4 is a non-woven fabric with adhesive on one side. The side with adhesive is provided with release paper, and the other side is bonded to the outer side of the cover plate 3.

[0022] See Figure 5, a medicine storage bin A for placing a medicine storage cylinder 9 is arranged on the inner wall of the bottom plate of the shell 1. The medicine storage cylinder 9 is placed in the medicine storage bin A. The medicine storage bin A is formed by downward depression of the inner surface of the bottom plate of the shell 1. The medicine storage bin A is located on one side of the bottom plate of the shell 1 and at one end of the bottom plate of the shell 1. A driving bin B for placing a driving device is arranged at the other end of the medicine storage bin A. The driving device 5 is placed in the driving bin B. A medicine pushing bin C for placing a medicine pushing device is arranged between the medicine storage bin A and the driving bin B. A power supply bin D for placing a power supply module 6 is arranged on the inner wall of the bottom plate of the shell 1 on the other side relative to the medicine storage bin A. The medicine storage bin A, the driving bin B, the medicine pushing bin C, and the power supply bin D are separated by a partition fixed on the bottom plate of the shell 1. The partition and the bottom plate of the shell 1 are of an integrally formed structure. A support base 12 is arranged at the central position of the bottom plate of the shell 1. The support base 12 and the shell 1 are of an integral structure. The injection device 2 is arranged on the support base 12. The support base 12 is in a stepped shape formed by sequentially stacking discs with different diameters up and down, and the diameter of its top is smaller than that of its bottom. The injection device 2 is arranged in the middle of the shell 1, between the medicine storage cylinder 9 and the power supply module. The layout is reasonable, making full use of the inner cavity space of the shell, reducing the volume of the shell, and further reducing the volume of the injection pump of the present invention. Such a layout can also shorten the distance between the medicine storage cylinder and the injection device 2, thereby shortening the length of the connecting tube 11. Moreover, the inner diameter of the connecting tube is small, and the inner diameter of the connecting tube 11 is 0.18 - 0.3 mm, which can effectively reduce the residual liquid medicine and avoid waste. A through hole through which a guiding steel needle 28 passes is formed in the bottom plate of the shell 1. Through holes for allowing a indwelling hose 25 to pass through are arranged on both the cover plate 3 and the dressing 4.

[0023] See Figure 5 and Figure 6, in this embodiment, the injection device 2 includes a guiding steel needle 28, an indwelling hose 25, and a steel needle handle 29. The guiding steel needle 28 is fixed on the steel needle handle 29. The steel needle handle 29 is located outside the housing 1 and is detachably connected to the bottom plate of the housing 1. A fastener is provided at the position of the bottom plate of the housing 1 corresponding to the support base 12. The steel needle handle 29 is snap-fitted to the installation groove (not shown in the figure) provided on the housing 1 through the fastener 291. An external fixing seat 26 is provided on the support base 12. An outer fixing cylinder 18 adapted to the external fixing seat 26 is provided on the outside of the external fixing seat 26. The top end of the fixing cylinder 18 is fixed to the cover plate 3. After the cover plate 3 is fixed to the housing 1, the bottom end of the fixing cylinder 18 is pressed against the support base 12 to limit the external fixing cylinder 26. A receiving cavity is opened at the center of one end face of the external fixing cylinder 26. The top of the support base 12 extends into the receiving cavity of the external fixing seat 26. A sealing gasket 21 is provided on the top surface of the support base 12. A guiding seat 22 is provided on the top of the sealing gasket 21. The sealing gasket 21 is a rubber gasket, and the guiding seat 22 is a metal part. The guiding seat 22 has a circular bottom plate and a guiding cylinder. The bottom end of the guiding cylinder is fixedly connected to the circular bottom plate. A through hole for guiding the steel needle 28 to pass through is provided on the circular bottom plate and is coaxial with the guiding cylinder. The inner diameter of the guiding cylinder is slightly larger than the outer diameter of the guiding steel needle 28 to enable the guiding steel needle 28 to pass through the guiding seat 22 smoothly. Setting the metal guiding seat 22 can prevent the tip of the guiding steel needle 28 from being eccentric and piercing the inner fixing seat 23 after piercing the sealing gasket 21 during the process of assembling the injection pump of the present invention, thus damaging the tip of the needle and making the tip not sharp. The guiding seat 22 can guide the tip of the needle to pass through the inner fixing seat 23. An inner fixing seat 23 is provided on the outside of the guiding seat 22. Specifically, a receiving cavity for accommodating the guiding seat 22 is provided at the center of one end face of the inner fixing seat. The guiding seat 22 is disposed in the receiving cavity. A guiding tube 24 and an indwelling hose 25 are provided on the top of the inner fixing seat 23. The guiding tube 24 is supported by a metal material. The guiding tube 24 is sleeved inside the indwelling hose 25. The tip of the guiding steel needle 28 sequentially passes through the support base 12, the sealing gasket 21, the guiding seat 22, the inner fixing seat 23, and the guiding tube 24 from the outside of the bottom plate of the housing 1 and extends out of the indwelling hose 25. Liquid medicine inlets 27 are provided on both the inner and outer fixing seats 23 and 26. The connecting tube 11 passes through the liquid medicine inlet 27 provided on the external fixing seat 26 and is connected to the liquid medicine inlet 27 provided on the inner fixing seat 23, so that the liquid medicine enters the indwelling hose 25 from the medicine storage cylinder 9 through the connecting tube 11 and the inner fixing seat 23. The guiding tube 24 can not only fix the indwelling hose 25 between the inner and outer fixing seats 23 and 26 to ensure its stability, but also prevent the guiding steel needle 28 from piercing the indwelling hose 25 during the process of inserting the guiding steel needle 28 into the indwelling hose 25, resulting in product rejection and ensuring the qualification rate of the product.In addition, the present invention adopts the structure in which the inner and outer fixing seats 23 and 26 are sleeved with each other and the structure in which the inner fixing seat 23 is sleeved in the needle sleeve of the indwelling hose 25. While being able to stably fix the indwelling hose 25, it can also effectively reduce the cavity volume of the inner cavity of the needle sleeve of the indwelling hose 25, thereby reducing the residual liquid medicine, reducing the waste of liquid medicine, and reducing the economic burden on patients.

[0024] In this example, as Figure 5 shown, the medicine pushing device 7 includes a push rod 71 and a lead screw 73. The push rod 71 is of a hollow structure, and a lead screw sleeve 72 adapted to the lead screw 73 is fixedly arranged therein. One end of the push rod 71 is fixedly connected to the piston 10. One end of the lead screw 73 is connected to the output end of the driving device 5, and the other end of the lead screw 73 is located in the cavity of the push rod 71. The lead screw 73 is sleeved in the lead screw sleeve 72, and the lead screw 73 and the lead screw sleeve 72 form a screw pair. Under the action of the driving device 5, the lead screw 73 rotates, and the lead screw sleeve 72 sleeved thereon moves linearly along the lead screw 73, thereby driving the push rod fixed on the lead screw sleeve 72 to move, and further pushing the piston 10 to move along the inner wall of the medicine storage cylinder 9, so that the liquid medicine therein enters the indwelling hose 25 through the medicine outlet 14, the connecting pipe 11, and the fixing seat 23.

[0025] In this embodiment, the driving device 5 is used to drive the medicine pushing device 7, and its specific structure is as follows: Refer to Figure 5 , the driving device 5 includes a micro motor 51 and a reduction gearbox 52. The output end of the micro motor 51 is connected to the input end of the reduction gearbox 52, and the output end of the reduction gearbox 52 is connected to the power input end of the medicine pushing device 7 to provide power for the medicine pushing device 7. Specifically, the power output shaft of the micro motor 51 is connected to the power input shaft of the reduction gearbox 52 through a coupling, and the power output shaft of the reduction gearbox 52 is connected to the lead screw 73 through a coupling. A multi-stage gear transmission is arranged in the reduction gearbox 52. The torque output by the micro motor 51 is transmitted to the lead screw 73 through the multi-stage gear transmission mechanism, thereby driving the lead screw 73 to rotate and further pushing the piston 10. The micro motor in this example is a stepping motor.

[0026] In this embodiment, refer to Figure 3 and Figure 5, the power supply module includes a button battery 63 and an electromagnetic switch 62. The button battery 63 is arranged in a battery holder 61. Both the battery holder 61 and the electromagnetic switch 62 are mounted on a circuit board 64. The circuit board 64 is arranged on the inner wall of the bottom plate of the housing 1. On the inner wall of the bottom plate of the housing 1, there are two spaced apart clamping blocks 17. The cooperation between the side wall of the housing 1 and the clamping blocks 17 limits the circuit board 64. The battery holder 61 is electrically connected to the micro motor 51 to supply power to the micro motor 51. Through holes 13 are respectively formed in the cover plate 3 and the patch 4 corresponding to the electromagnetic switch. The electromagnetic switch 62 is connected in the circuit formed by the micro motor 51 and the button battery 62 to turn on and off the circuit. In this embodiment, two button batteries 63 are provided and the two button batteries 63 are connected in parallel.

[0027] It should be noted that after the portable fully disposable micro-injection pump of the present invention is assembled, it needs to be packaged to prevent contamination and is convenient for transportation and sales. The portable fully disposable micro-injection pump is placed in a packaging box. Inside the packaging box, a magnet adapted to the through hole 13 is fixedly arranged corresponding to the through hole 13. Under the magnetic force of the magnet, the electromagnetic switch 62 is in an off state, saving the power of the button battery 63. When the injection pump is taken out of the packaging box, the electromagnetic switch 62 is separated from the magnet, and the magnetic force of the magnet loses its effect on the electromagnetic switch 62. The electromagnetic switch 62 is in a closed state to connect the circuit of the micro motor 51 and the button battery 63. The through hole 13 in this embodiment is a circular hole, so the magnet is cylindrical. After the injection pump is placed in the packaging box, one end of the magnet is inserted into the through hole 13 and extends into the housing 1 through the patch 4 and the cover plate 3 in sequence. A sleeve for accommodating the magnet is arranged on the inner surface of the cover plate 3 corresponding to the through hole 13. A soft needle cap is also placed in the packaging box. During use, after the indwelling hose 25 is inserted into the human body by using the guiding steel needle 28, the guiding steel needle 28 is pulled out by using the steel needle handle 29, and the soft needle cap is inserted into the installation groove of the housing 1 for installing the steel needle handle 29 to keep the bottom plate of the housing 1 flat and improve the appearance quality.

[0028] Based on the present invention, as other embodiments not shown in the drawings of the present invention, different medicaments can be injected into the medicine storage cylinder 9 during production according to user requirements. In order to prevent the medicament from being discharged from the medicine outlet 14, the medicine outlet is sealed by using a sealing assembly 16. During use, the sealing assembly is separated from the medicine outlet 14. Specifically, the sealing assembly seals the medicine adding port of the medicine storage cylinder 9. The medicine adding port can also use the same hole as the medicine outlet 14. During production, after adding medicine to the medicine storage cylinder 9, the cover hole is sealed by using the sealing plug of the sealing assembly.

[0029] In another embodiment not shown in the figures of the present invention, the liquid medicine adding port and the medicine outlet 14 can be two ports. The medicine outlet 14 is connected to one end of the connecting pipe 11. The sealing assembly has a sealing plug for sealing the liquid medicine adding port and further includes a pressing piece for pressing the connecting pipe 11. By using the cooperation between the pressing block and the end of the partition plate, the connecting pipe is compressed so that its inner cavity is blocked, thereby achieving the effect of sealing the connecting pipe 11 and preventing the liquid medicine from being discharged through the connecting pipe 11, resulting in waste. Specifically, one end of the pressing piece is pressed against the connecting pipe, and the other end is connected to the connecting rod. The other end of the connecting pipe passes through the side plate of the housing and is connected to the limiting disk. The limiting disk is snap-connected to the side plate of the housing. During use, the limiting disk is pulled outwards, so that the pressing piece moves outwards under the action of the connecting rod, thereby releasing the restriction of the pressing piece on the connecting pipe. The sealing assembly of this structure is simple in structure, easy to manufacture, and low in manufacturing cost, which can reduce the product cost.

[0030] In another embodiment not shown in the figures of the present invention, a solenoid valve is provided at one end of the connecting pipe close to the medicine storage cylinder. The solenoid valve is connected to the control module. During use, the control module automatically controls the solenoid valve to open. The solenoid valve can also be used to make the inner cavity of the connecting pipe open and closed. However, this structure is higher in cost than the structure of the cooperation between the pressing piece and the partition plate in the above embodiment and is not a preferred choice.

[0031] See Figure 1 、 3 、4 and Figure 5 ,The injection pump of this embodiment further includes a liquid transfer device 8. The liquid transfer device 8 is installed on the housing 1 through the mounting seat 15. Specifically, the mounting seat 15 is fixedly arranged on the outer surface of the wall plate of the housing 1, opposite to the closed end of the medicine storage cylinder 9. The liquid transfer device 8 is snap-connected to the mounting seat 15 to realize the detachable installation of the liquid transfer device 8 on the housing 1. When the user injects insulin, the liquid medicine can be directly filled into the medicine storage cylinder 9 through the liquid transfer device 8. When injecting other drugs or other insulins without a pusher, the liquid medicine is filled into the medicine storage cylinder 9 by using a syringe or reversing the motor. The operation is simple and the use is convenient.

[0032] See Figure 5, the pipetting device 8 of this embodiment includes a pipetting needle 81 and a pipetting needle seat 82. The pipetting needle seat 82 is snap-connected to the mounting seat 15. The pipetting needle 81 is fixed to the pipetting needle seat 82 by bonding. One end of the pipetting needle 81 passes through a pipetting needle hole 85 formed in the side plates of the mounting seat 15 and the housing 1 and extends into the housing 1, and the other end is located inside the pipetting needle seat 82. A pressing rod 83 is fixedly arranged on the pipetting needle seat 82. The end of the pressing rod 83 away from the pipetting needle seat 82 passes through a pressing rod hole 84 formed in the housing 1 for the pressing rod 83 to pass through, and its end face presses tightly on the sealing assembly 16. Preferably, the sealing assembly 16 is snap-connected to the pressing rod 83. The cross-section of the pressing rod 83 is square, and the square shape plays a positioning role and is convenient for assembly. During pipetting, the pipetting needle seat 82 is pressed, and the inner end (the end located inside the housing 1) of the pipetting needle 81 pierces the sealing assembly 16 and passes through the sealing assembly 16 and inserts into the medicine storage cylinder 9. The other end pierces the rubber stopper on the medicine bottle to connect the liquid medicine. After loading the medicine, the pipetting needle 81 is pulled out. During the process of loading the liquid medicine, the pipetting needle 81 on the pipetting needle seat 82 communicates with the medicine storage cylinder 9. At the same time, the pressing rod 83 on the pipetting needle seat 82 seals the medicine passing hole in the direction of the connecting pipe 11, ensuring that the liquid medicine only enters the medicine storage cylinder 9 and does not flow to the connecting pipe 11. After sucking the medicine, the pipetting needle seat 82 is pulled out. At this time, driven by the pipetting needle 81 and the pressing rod 83, the sealing assembly moves outward (i.e., in the direction of the pipetting needle seat 82), and the liquid level rises. At this time, the medicine passing hole in the direction of the connecting pipe 11 of the medicine storage cylinder 9 is unsealed, and the liquid medicine can only flow in the direction of the connecting pipe 11. This structure is ingeniously conceived. It can not only complete the loading of the medicine, but also prevent the liquid medicine from entering the connecting pipe 11 during the pipetting process of loading the medicine, and being discharged through the connecting pipe 11 and the injection device 2, resulting in waste.

[0033] See Figure 5 , in this embodiment, the sealing assembly 16 includes a sealing chamber 161 provided on the liquid storage cylinder 9 and a sealing block 162 provided in the sealing chamber 161. The sealing chamber 161 corresponds to the pipetting needle hole 85 formed in the housing 1. The sealing chamber 161 is provided with a medicine passing hole communicating with the medicine outlet 14 and a pipetting hole for the pipetting needle to pass through. A sealing block 162 is arranged in the sealing chamber 161 to seal the pipetting hole and the medicine passing hole.

[0034] The above-mentioned portable disposable micro-injection pump further includes a detection module, a control module, and a communication module. The detection module is used to detect the distance advanced by the piston 10 and transmit the measured signal to the control module. The control module processes the signal transmitted by the detection module to control the start and stop of the micro-motor 51, thereby controlling the injection volume. The communication module communicates with a remote control terminal to achieve remote control, and can be remotely managed and controlled through a mobile device or a computer connected to the injection pump. The detection unit includes a counting opto-coupler 19. The counting opto-coupler 19 is arranged at one end of the micro-motor 51 away from its output end and is coaxially arranged with the power shaft of the micro-motor 19. The coaxial arrangement of the counting opto-coupler 19 and the power shaft of the micro-motor 19 can calculate the number of light holes passed by the power. Through the reduction ratio of the speed reducer 52 and the pitch of the lead screw, the distance advanced by the piston 10 is calculated. The control module includes a processor and a peripheral device interface. In this embodiment, the processor can be a central processing unit (CPU), or other microprocessors, digital signal processors (DSPs), or programmable logic controllers (PLCs), etc. The processor is installed on the circuit board 64. In this embodiment, the processor and the peripheral device interface are implemented on a single chip. In other embodiments of the present invention, the processor and the peripheral device interface can be implemented on multiple separate chips. The communication module is connected to the control module, and the control module is connected to the remote control terminal through a wireless network (WiFi), a 4G network, or Bluetooth. The remote control terminal is a PC computer, a handheld APP, or a device capable of communicating with the communication module. Setting the detection module can not only measure the distance advanced by the piston, thereby improving the injection accuracy, but also prevent the phenomenon of the motor idling, which affects the injection accuracy and causes inaccurate drug administration to the patient, affecting the curative effect. When the detection unit detects the phenomenon that the motor shaft rotates only while the piston does not advance, the fault is fed back to the remote control terminal through the communication module to remind the user. The injection pump of the present invention can also be provided with an alarm unit, and the alarm unit is connected to the control module for control. The alarm unit includes an alarm lamp arranged on the housing. When the motor idles or does not rotate, the detection module transmits the detected signal to the control module, and the control module issues an instruction to control the alarm lamp to flash after calculation, or a buzzer is provided, and the buzzer emits a sound to remind the user when a fault occurs.

[0035] The overall structure of the portable disposable micro-injection pump of the present invention is small and portable. When in use, it is adhered to the patient's body, with strong concealment, high injection accuracy, disposable after use, convenient to use, simple and safe to operate, and does not affect the patient's activities during use, allowing free movement. It can achieve rapid injection anytime and anywhere, reduce the discomfort of the patient, and greatly improve the patient's quality of life.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable fully disposable micro-injection pump, comprising a shell, a drug storage cartridge, a drug pushing device, an injection device, a driving device and a power supply module, wherein a cover plate is arranged at the top opening of the shell, and the cover plate and the shell enclose an inner cavity of the shell, the drug storage cartridge, the driving device, the drug pushing device and the power supply module are arranged in the inner cavity of the shell, a piston is arranged in the drug storage cartridge, the piston is connected to the drug pushing device, the drug pushing device is connected to the driving device, so as to drive the drug pushing device to push out the drug liquid in the drug storage cartridge, the power supply module is electrically connected to the driving device, so as to supply power to the driving device, characterized in that: A drug outlet connected to the inner cavity of the drug storage cartridge is arranged on the outer side of one end of the drug storage cartridge away from the drug pushing device. The drug outlet is connected to the drug inlet of the injection device through a connecting tube. A sealing component is arranged between the drug outlet and the drug storage cartridge, and a patch is fixedly arranged on the outer side of the cover plate.

2. The portable fully disposable micro-injection pump according to claim 1, characterized in that: The drug storage cartridge, drug pushing device and driving device are located on one side of the bottom plate of the shell, the power supply module is located on the other side of the bottom plate of the shell and is arranged close to the driving device, the injection device is located in the middle of the bottom plate of the shell, the shell is a plastic product, and an integral partition and a card block are arranged on the inner wall of the shell to enable the drug storage cartridge, drug pushing device, driving device and power supply module to be clamped and limited.

3. The portable fully disposable micro-injection pump according to claim 1 or 2, characterized in that: A liquid transfer device is detachably arranged on the outer side of the shell, and the liquid transfer device is installed on the shell through a mounting seat.

4. The portable fully disposable micro-injection pump according to claim 1, characterized in that: The pipetting device includes a pipetting needle and a pipetting needle seat, which is snap-fitted with the mounting seat. The pipetting needle is arranged on the pipetting needle seat, one end of which passes through the pipetting needle hole opened on the mounting seat and the side plate of the shell and extends into the shell, and the other end is located in the pipetting needle seat. A pressure rod is fixedly arranged on the pipetting needle seat, and one end of the pressure rod away from the pipetting needle seat passes through the pressure rod hole opened on the shell for the pressure rod to pass through, and the end face of the pressure rod is pressed tightly on the sealing assembly.

5. The portable fully disposable micro-injection pump according to claim 4, characterized in that: The sealing assembly includes a sealing chamber arranged on the liquid storage cylinder, which corresponds to the pipetting needle hole opened on the shell, and is provided with a liquid through hole connected to the inner cavity of the drug storage cylinder and a pipetting hole corresponding to the needle hole. A sealing block is arranged in the sealing chamber to seal the liquid through hole and the pipetting hole.

6. The portable fully disposable micro-injection pump according to claim 1, characterized in that: The injection device includes a guide steel needle, an indwelling hose and a steel needle handle, wherein the guide steel needle is fixed on the steel needle handle, and the steel needle handle is located on the outside of the shell and is detachably connected to the bottom plate of the shell, and a support base is fixedly provided on the bottom plate corresponding to the steel needle handle, and the support base is in a step shape, and an external fixing seat is provided on the support base, and a fixing cylinder adapted to the external fixing seat is provided on the outside of the external fixing seat, and the top end of the fixing cylinder is fixed on the cover plate so that after the cover plate is fixed to the shell, the bottom end of the fixing cylinder is pressed on the support base to limit the external fixing cylinder, and the top of the support base extends into the inner cavity of the external fixing seat. A sealing pad is arranged on the top surface of the support base, a guide seat is arranged on the sealing pad, an inner fixing seat is arranged on the outer side of the guide seat, a guide tube and the retention hose are arranged on the top of the inner fixing seat, the guide tube is sleeved in the retention hose, the needle tip of the guide steel needle passes through the support base, the sealing pad, the guide seat, the inner fixing seat and the guide tube in sequence from the outside of the shell and extends out of the retention hose, a medicine liquid inlet is arranged on both the inner and outer fixing seats, the connecting tube passes through the medicine liquid inlet arranged on the outer fixing seat and is connected with the medicine liquid inlet arranged on the inner fixing seat, so that the medicine liquid enters the retention hose from the medicine storage cartridge through the connecting tube and the inner fixing seat.

7. The portable fully disposable micro-injection pump according to claim 1, characterized in that: The power supply module includes a button battery and an electromagnetic switch, wherein the button battery is arranged in a battery holder, and the battery holder and the electromagnetic switch are both mounted on a circuit board arranged on the inner wall of the bottom plate of the shell, and the battery holder is electrically connected to the micromotor of the driving device to power the micromotor, and through holes are provided on the cover plate and the patch at locations corresponding to the electromagnetic switch, and the electromagnetic switch is connected to a circuit formed by the micromotor and the button battery to open and close the circuit, and a magnet is fixedly provided at a location corresponding to the through hole in the packaging box on the outside of the portable fully disposable micro-injection pump, and the electromagnetic switch is in an open state under the action of the magnetic force of the magnet, and when the injection pump is taken out of the packaging box, the electromagnetic switch is in a closed state to connect the circuit of the micromotor and the button battery.

8. The portable fully disposable micro-injection pump according to claim 7, characterized in that: The driving device includes a micro motor and a reduction box, the output end of the micro motor is connected to the input end of the reduction box, and the output end of the reduction box is connected to the power input end of the medicine pushing device to provide power for the medicine pushing device.

9. The portable fully disposable micro-injection pump according to claim 8, characterized in that: The portable fully-throwable micro-injection pump also includes a detection module, a control module, and a communication module. The detection module is used to detect the distance the piston is advanced and transmit the measured signal to the control module. The control module processes the signal transmitted by the detection module to control the start and stop of the micro motor. The communication module communicates with the remote control end to achieve remote control, which can be used to remotely manage and control the connection of the injection pump through a mobile device or a computer. The detection unit includes a counting optical coupler, which is arranged at one end of the micro motor away from its output end and is coaxially arranged with the power shaft of the micro motor.

10. The portable fully disposable micro-injection pump according to claim 8, characterized in that: The medicine pushing device includes a push rod and a screw rod. The push rod is a hollow structure, and a threaded sleeve adapted to the screw rod is fixedly arranged inside the push rod. One end of the push rod is fixedly connected to the piston, one end of the screw rod is connected to the reduction box, and the other end is located inside the push rod. The screw rod is sleeved in the threaded sleeve and forms a threaded pair with the threaded sleeve.

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