A semi-throw type patch infusion device

Abstract

The application discloses a semi-throw type patch infusion device, which comprises a reusable mechanism and a disposable mechanism, the disposable mechanism comprises a medicine storage bin capable of temporarily storing medicine liquid, a patch capable of being attached to the surface of skin, and an infusion needle capable of establishing a channel between the medicine storage bin and human body, the reusable mechanism is detachably connected with the disposable mechanism and is capable of electrically driving the medicine storage bin to carry out medicine feeding and discharging, and the disposable mechanism is a disposable article. The application limits the abandonment range to the components in contact with medicine and in contact with users, and the reusable mechanism for electrically driving is reserved, so that material waste is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of infusion pumps, and in particular to a semi-disposable dressing infusion device. Background Technology

[0002] Insulin injection is one of the effective treatments for diabetes. Patients can administer insulin at home using infusion devices such as insulin pens and infusion pumps. Infusion pumps typically use a dressing to fix the infusion needle and other components to the skin, and then use a peristaltic pump or piezoelectric pump to inject the medication into the body through the needle. Because it is very simple and convenient to operate (eliminating the problem of patients having to pinch the skin with one hand and hold the insulin pen at a specific angle with the other for a long time during insulin injection), it is becoming increasingly popular in the market.

[0003] Existing infusion pumps, such as the single-motor patch-type dual-channel microneedle infusion system disclosed in invention patent CN116271319A and the motorless piezoelectric infusion pump disclosed in utility model CN219501712U, once activated, bring the infusion needle and liquid tubing into contact with the medication and the user's bodily fluids, making them unusable after disassembly. However, used peristaltic pumps or piezoelectric pumps can still function normally; discarding them directly would be wasteful and environmentally unfriendly. Therefore, it is urgent to address how to reduce waste caused by directly discarding power components before they are damaged, while ensuring ease of operation and hygiene. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a semi-disposable dressing infusion device, which has the advantages of reusable electric components and reduced waste.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A semi-disposable dressing infusion device includes a reusable mechanism and a disposable mechanism. The disposable mechanism includes a drug storage tank for temporarily storing medication, a dressing that can be applied to the skin surface, and an infusion needle that can establish a channel between the drug storage tank and the human body. The reusable mechanism and the disposable mechanism are detachably connected, and the drug storage tank can be electrically driven to feed and dispense medication. The disposable mechanism is for single-use purposes.

[0006] By adopting the above technical solution, the drug storage tank that comes into contact with the liquid medicine, the dressing and infusion needle that come into contact with the user are all contained in a disposable mechanism that is used as a single item. After use, the disposable mechanism containing the drug storage tank, dressing and infusion needle is discarded, which greatly improves hygiene. At the same time, the scope of disposal is limited to the parts that come into contact with the medicine and the user, while the reuse mechanism for electric drive is retained, which greatly reduces material waste.

[0007] Optionally, the reuse mechanism includes a housing and an electric drive assembly; the electric drive assembly is installed inside the housing; the disposable mechanism also includes a base; the drug storage chamber, dressing, and infusion needle are all disposed on the base; the electric drive assembly and the drug storage chamber are located inside a housing formed by the detachable connection of the housing and the base; the electric drive assembly is detachably connected to the drug storage chamber and is used to drive the drug storage chamber to feed and dispense drugs; the disassembly and assembly directions of the electric drive assembly and the drug storage chamber are the same as those of the housing and the base, and the disassembly and assembly are completed simultaneously.

[0008] By adopting the above technical solution, the electric drive assembly and the drug storage compartment are disassembled and assembled in the same direction as the outer shell and the base, and are disassembled and assembled simultaneously. This results in high disassembly and assembly efficiency and is easy to operate.

[0009] Optionally, the drug storage compartment has a compartment channel and a piston that reciprocates within the compartment channel; the electric drive assembly has a connecting post parallel to the disassembly / assembly direction of the outer shell and the base; the outer end of the piston is formed with a connecting hole that mates with the connecting post; the electric drive assembly drives the piston to reciprocate within the compartment channel via the connecting post and the connecting hole to achieve drug feeding and discharging.

[0010] By adopting the above technical solution, the connecting pins can be simultaneously detached from and inserted into the connecting sockets while the outer shell and base are being disassembled and assembled. This structure is simple and facilitates processing and subsequent disassembly and assembly operations.

[0011] Optionally, the electric drive assembly includes an electric motor module and a push rod module; the electric motor module includes an electric motor housing and an electric motor disposed within the electric motor housing; the electric motor has a drive output driven gear; only a portion of the teeth of the drive output driven gear is exposed outside the electric motor housing; the push rod module includes a push rod housing and a push rod telescopically disposed within the electric motor housing; the push rod has an output arc tooth segment and a connecting portion; the connecting portion is detachably connected to the piston; the output arc tooth segment meshes with the drive output driven gear; when the push rod is telescopically retracted within the push rod housing, only the portion of the output arc tooth segment meshing with the drive output driven gear and the connecting portion are exposed outside the push rod housing.

[0012] By adopting the above technical solution, the exposed parts of the electric motor of the electric motor module and the push rod of the push rod module are minimized, reducing the possibility of damage and contamination.

[0013] Optionally, the medicine storage compartment has a liquid inlet pipe; the liquid inlet pipe has a liquid inlet port that is perpendicular to the side wall of the outer shell away from the base; a coaxially arranged liquid inlet pin is installed in the liquid inlet port; and a medicine insertion hole is formed on the side wall of the outer shell opposite to the opening of the liquid inlet port.

[0014] By adopting the above technical solution, the medicine bottle can be directly inserted into the inlet of the liquid inlet tube through the medicine insertion hole. During this process, the liquid inlet needle is inserted into the medicine bottle. This eliminates the need to open the reuse mechanism and the disposable mechanism to inject the medicine into the storage tank, greatly reducing the inconvenience of operation and also reducing the possibility of contamination of the disposable mechanism.

[0015] Optionally, an outer plug is detachably connected to the outer casing; the outer plug includes an outer plug block detachably connected to the medicine insertion hole and a connecting bolt passing through and movably connected to the outer plug block; an inner plug body is inserted into the liquid inlet; the inner plug body covers the liquid inlet needle; a nut that mates with the connecting bolt is fixed on the inner plug body; the diameter of the inner plug body is less than or equal to the diameter of the medicine insertion hole.

[0016] By adopting the above technical solution, the inner plug body seals the liquid inlet, reducing the possibility of foreign objects entering and accidental injury from the liquid inlet needle. The outer plug seals the medicine inlet, reducing the possibility of foreign objects entering, thus greatly reducing the possibility of contamination. When needed, the connecting bolt is rotated to connect with the nut on the inner plug body, so that the inner plug body can be removed at the same time as the outer plug, greatly improving the convenience of operation.

[0017] Optionally, the medicine insertion port may be detachably connected to a protective cover; the protective cover is used to close the medicine insertion port and cover the medicine bottle passing through the medicine insertion port.

[0018] By adopting the above technical solution, when the infusion pump is not in use, the protective cover can seal the medicine insertion port; when the infusion pump is in use, the protective cover can not only seal the medicine insertion port, but also protect the medicine bottle, thus greatly improving the safety of use.

[0019] Optionally, the inner wall surface of the outer casing away from the base is provided with an inner connecting ring column in the shape of a cylindrical ring, coaxial with the medicine insertion hole; the protective cover includes a protective cover body; the protective cover body has at least two sliding limiting parts and is evenly distributed around the circumference; the inner cylindrical surface of the inner connecting ring column is formed with a plurality of axial sliding grooves for the sliding limiting parts to slide axially; the axial sliding grooves are opened at one end facing the outer casing; one side wall of the axial sliding groove parallel to the axial direction of the protective cover body is formed with an arc-shaped axial limiting groove for the circumferential movement of the sliding limiting part; all the axial limiting grooves are in the same clockwise direction away from the axial sliding grooves they communicate with; an elastic element is provided inside the liquid inlet.

[0020] By adopting the above technical solution, the medicine bottle is placed inside the protective cover, and then the protective cover and the medicine bottle pass through the medicine inlet and the inner connecting ring together. At this time, the medicine bottle is connected to the liquid inlet pipe of the medicine storage compartment and the elastic element is squeezed. During this process, the sliding limit part on the protective cover slides along the axial sliding groove on the corresponding side. Then, the protective cover is rotated so that the sliding limit part slides circumferentially into the axial limit groove. At this time, the protective cover is not easy to detach. In this way, the protective cover not only provides protection, but also restricts the medicine bottle from detaching from the liquid inlet pipe. After the medicine storage compartment is filled, the protective cover is rotated so that the sliding limit part returns to the axial sliding groove. The elastic element squeezed in the liquid inlet acts on the medicine bottle, so that the medicine bottle and the protective cover detach together. This reduces the steps of manually pulling out the medicine bottle and the protective cover, and greatly improves the convenience of use.

[0021] Optionally, multiple axial limiting grooves are formed on the side wall of the axial sliding groove where the axial limiting groove is located.

[0022] By adopting the above technical solution, the sliding limiting part on the protective cover can be made to enter the corresponding axial limiting groove according to the length of the medicine bottle; the elastic force of the elastic element will change due to the length of use, and the sliding limiting part on the protective cover can change the axial limiting groove it enters to change the degree of compression of the elastic element, so that the elastic element maintains a suitable elastic force after compression, which greatly improves the flexibility of use.

[0023] Optionally, the protective cover includes a protective cover body that passes through and is screwed into the medicine inlet; the inner wall of the protective cover body is formed with an elastic damping element for holding the medicine bottle and / or an elastic element is provided in the liquid inlet.

[0024] By adopting the above technical solutions, the elastic damping component allows the medicine bottle and the protective cover body to be integrated as one unit. In this way, when the protective cover body rotates away from the medicine insertion hole, the medicine bottle simultaneously detaches from the inlet pipe. Alternatively, there may be no elastic damping component, but an elastic component is provided inside the inlet port. In this way, when the protective cover body rotates away from the medicine insertion hole, the medicine bottle simultaneously detaches from the inlet pipe under the action of the elastic component. Or, by using both elastic damping component and elastic component, it can be ensured that the medicine bottle simultaneously detaches from the inlet pipe when the protective cover body rotates away from the medicine insertion hole. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a frontal structural schematic diagram of the present invention.

[0027] Figure 3 This is a schematic diagram of the explosion structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the explosion structure of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of the driving part of the present invention that acts on the piston.

[0030] Figure 6 This is a schematic diagram of the electric motor module of the present invention.

[0031] Figure 7 This is a schematic diagram of the structure of the electric motor of the present invention.

[0032] Figure 8 This is a schematic diagram of the structure of the electric motor of the present invention.

[0033] Figure 9 This is a schematic diagram of the throwable mechanism of the present invention.

[0034] Figure 10 This is a schematic diagram of the structure of the present invention, omitting the cover plate and the infusion needle.

[0035] Figure 11 This is a schematic diagram of the infusion needle of the present invention.

[0036] Figure 12 This is a structural schematic diagram of one embodiment of the present invention.

[0037] Figure 13 This is a structural schematic diagram of one embodiment of the present invention.

[0038] Figure 14 This is a structural schematic diagram of one embodiment of the present invention.

[0039] Figure 15 This is the invention Figure 14 A magnified structural diagram of part A in the diagram.

[0040] Figure 16 This is a cross-sectional structural schematic diagram of the inner connecting ring post 18 of the present invention.

[0041] Figure 17 This is a structural schematic diagram of one embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures: 10. Outer casing; 100. Medicine insertion port; 11. Indicator light; 12. Switch; 13. System control board; 15. External plug; 151. External plug block; 152. Connecting bolt; 1521. Stop ring; 17. Elastic element; 18. Inner connecting ring post; 180. Inner guide groove; 181. Axial sliding groove; 182. Axial limiting groove; 19. Protective cover; 191. Protective cover body; 192. Sliding limiting part; 193. Elastic damping element; 194. External support ring; 20. Electric motor module; 21. Electric upper housing; 22. Electric lower housing; 220. First notch; 23. Electric motor; 231. Servo motor; 232. Worm gear; 233. Transmission input section; 2331. Worm wheel; 2332. Transmission input driven gear; 234. Intermediate transmission section; 235. Transmission output section; 2351. Transmission output driving gear; 2352. Transmission output driven gear; 30. Push rod module; 31. Lower push rod housing; 32. Upper push rod housing; 33. Push rod; 331. Push rod body; 332. Output arc tooth segment; 333. Connecting support plate; 334. Connecting pin; 40. Throwable mechanism; 50. Base; 51. Connecting ring; 52. Base plate; 520. Central perforation; 53. Intermediate support ring; 530. Clearance notch; 60. Drug storage compartment; 61. Drug storage compartment body; 62. Piston; 621. Slider body; 622. Sealing ring; 623. Piston connecting plate; 6230. Connecting hole; 63. Liquid inlet pipe; 631. Liquid inlet connecting pipe body; 6310. Liquid inlet port; 632. Liquid inlet needle; 64. Liquid outlet connecting pipe; 65. Inner plug; 651. Inner plug body; 6510. Needle tip groove; 652. Nut; 70. Cap; 80. Applying plaster; 90. Infusion needle; 91. Infusion needle tubing; 92. Infusion support; 93. Infusion inlet tubing; 94. Connector; 200. Medicine bottle. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-17 The present invention will be described in further detail below.

[0044] Example 1: A semi-disposable dressing infusion device is disclosed, with reference to... Figures 1-4 It includes a reusable mechanism and a disposable mechanism 40; the disposable mechanism 40 is detachably connected to the reusable mechanism; the disposable mechanism 40 is used as a disposable item; while the reusable mechanism is retained and used in combination with subsequent new disposable mechanisms 40.

[0045] refer to Figure 3 and Figure 4The reuse mechanism includes a housing 10 and an electric drive assembly; the housing 10 is a cylindrical shape with one end open; the electric drive assembly includes a system control component, an electric motor module 20, and a push rod module 30; the system control component, the electric motor module 20, and the push rod module 30 are all fixed inside the housing 10 by screws; the system control component includes a system control board 13 fixed inside the housing 10 and a switch 12 mounted on the housing 10; the switch 12 is electrically connected to the system control board 13; in order to display the working status, an indicator light 11 is provided on the top of the housing 10, and the indicator light 11 is electrically connected to the system control board 13.

[0046] refer to Figures 6-8 The electric motor module 20 includes an electric motor housing and an electric motor 23 disposed within the electric motor housing 23. The electric motor housing includes an upper electric motor housing 21 and a lower electric motor housing 22. The upper electric motor housing 21 and the lower electric motor housing 22 are connected as one unit by snap-fit ​​or by screws. The electric motor 23 includes a servo motor 231, a worm gear 232 coaxially fixed on the output shaft of the servo motor 231, a transmission input section 233, several intermediate transmission sections 234, and a transmission output section 235. The transmission input section 233, the intermediate transmission sections 234, and the transmission output section 235 are all double gears. The transmission input section 233 includes a worm gear 2331 and a transmission input driven gear 2332 coaxially arranged. The worm gear 2331 meshes with the worm gear 232. The intermediate transmission sections 234 include an intermediate transmission drive gear and an intermediate transmission drive gear coaxially arranged. The transmission output section 235 includes a transmission output drive gear 2351 and a transmission output driven gear 2352 coaxially arranged; the transmission input driven gear 2332 of the transmission input section 233 meshes with the intermediate transmission drive gear of the adjacent intermediate transmission section 234; the intermediate transmission driven gear of the intermediate transmission section 234 meshes with the intermediate transmission drive gear of the adjacent intermediate transmission section 234; the transmission output drive gear 2351 of the transmission output section 235 meshes with the intermediate transmission driven gear of the adjacent intermediate transmission section 234; the lower housing 22 of the electric motor has a first notch 220 formed on it for exposing part of the teeth of the transmission output driven gear 2352 of the transmission output section 235; in this way, only part of the teeth of the transmission output driven gear 2352 of the entire electric motor 23 are exposed on the outside of the electric motor housing, which provides good protection.

[0047] refer to Figures 5-8The push rod module 30 includes a push rod housing and a push rod 33 that is arc-shaped and telescopically disposed within the electric component housing; the push rod housing includes an upper push rod housing 32 and a lower push rod housing 31; the push rod 33 includes a fan-shaped push rod body 331, an output arc-shaped toothed segment 332 coaxially formed on the push rod body 331, and a connecting portion formed on one circumferential end of the push rod body 331; the lower push rod housing 31 and the upper push rod housing 32 are connected as one unit by a snap-fit ​​or by screws; the lower push rod housing 31 and the upper push rod housing 32 are connected as one unit by a snap-fit ​​or by screws. An arc-shaped guide groove is formed between the shells 32 to allow the push rod 33 to move in an arc; a second notch is formed on the upper shell 32 of the push rod to expose part of the teeth of the output arc-shaped tooth segment 332; the exposed part of the teeth of the output arc-shaped tooth segment 332 meshes with the exposed part of the teeth of the transmission output driven gear 2352; thus, when the push rod 33 extends or retracts inside the push rod shell, only the part of the teeth of the output arc-shaped tooth segment 332 that meshes with the transmission output driven gear 2352 and the connecting part of the push rod 33 are exposed outside the push rod shell, providing good protection.

[0048] To improve the positioning accuracy and stability of both the electric actuator module 20 and the push rod module 30, a polygonal column-shaped limiting post is formed on the upper end face of the push rod upper housing 32, and a limiting insertion hole for the limiting post is formed on the lower end face of the electric actuator lower housing 22. This prevents accidental movement of both modules, thus ensuring the accurate movement of the push rod 33. The electric actuator module 20 and the push rod module 30 are fixed inside the housing 10 with screws.

[0049] refer to Figures 2-4 The disposable mechanism 40 includes a base 50, a drug storage chamber 60, an dressing 80, and an infusion needle 90. The drug storage chamber 60, the dressing 80, and the infusion needle 90 are connected to the base 50. The base 50 includes a circular plate-shaped substrate 52 and a cylindrical connecting ring 51 coaxially formed on the substrate 52. In order to facilitate connection with the housing 10 of the reuse mechanism, a number of circumferentially evenly distributed slots are formed on the connecting ring 51, and a number of locking blocks are formed on the inner cylindrical surface of the housing 10. The locking blocks correspond one-to-one with the locking slots. When the reuse mechanism is connected to the disposable mechanism 40, the locking blocks of the housing 10 are locked in the locking slots of the base 50, and the housing 10 and the base 50 form a housing.

[0050] refer to Figures 2-4 The adhesive tape 80 is fixed on the end face of the substrate 52 away from the connecting ring 51; the adhesive tape 80 can be a low-sensitivity adhesive tape.

[0051] refer to Figure 9 and Figure 10The drug storage chamber 60 includes a main body 61, a piston 62, an inlet pipe 63, and an outlet connecting pipe 64. The main body 61 is arc-shaped with one end open and the other closed. An arc-shaped chamber channel is formed inside the main body 61. To limit the main body 61, a pair of limiting pins are formed on the upper end face of the base plate 52, and a pair of pin seats that cooperate with the limiting pins are formed on the outer surface of the main body 61. (Reference) Figure 5 The piston 62 includes a slider body 621 that mates with the chamber channel; several sealing rings 622 are installed on the slider body 621, and the sealing rings 622 enable the piston 62 to slide in a sealed manner within the chamber channel; a piston connecting plate 623 is formed on the outer end of the slider body 621; a pair of connecting holes 6230 are formed on the piston connecting plate 623; the connecting part of the push rod 33 includes a connecting support plate 333 formed on the push rod body 331, and a pair of connecting pins 334 that mate with the connecting holes 6230 are formed on the lower end surface of the connecting support plate 333; the axial direction of the connecting pins 334 is parallel to the disassembly and assembly direction of the outer shell 10 and the base 50. The inlet pipe 63 and the outlet pipe 64 are fixed to the end face of the drug storage chamber body 61 away from its opening. A one-way valve is installed inside the inlet pipe 63, through which the liquid medicine can only enter the drug storage chamber body 61 through the inlet pipe 63. A one-way valve is installed inside the outlet pipe 64, through which the liquid medicine can only leave the drug storage chamber body 61 through the outlet pipe 64. For better sealing and support, a support pressing part is formed on the lower shell 31 of the push rod, which matches the shape of the drug storage chamber body 61. When the reuse mechanism and the throwable mechanism 40 are connected, the support pressing part presses against the outer surface of the drug storage chamber body 61 away from the base plate 52.

[0052] refer to Figure 11 The infusion needle 90 includes an infusion needle tube 91, an infusion support base 92, an infusion inlet tube 93, and a connector 94. The infusion needle tube 91 is fixed on the infusion support base 92. One end of the infusion inlet tube 93 is fixed to the infusion support base 92 and connected to the infusion needle tube 91, and the other end is connected to the connector 94. The connector 94 is snapped into the outlet connection tube 64 of the drug storage tank 60. In order to fix the infusion needle tube 91, a central through hole 520 for the infusion needle tube 91 to pass vertically is formed in the center of the substrate 52. A coaxially arranged annular intermediate support ring 53 is fixed on the upper surface of the substrate 52. A cap 70 is screwed onto the intermediate support ring 53. The infusion support base 92 is restricted within the intermediate support ring 53 by the cap 70. An avoidance notch 530 is provided on the intermediate support ring 53 for the infusion inlet tube 93 to pass through. The avoidance notch 530 is open at one end away from the substrate 52.

[0053] The system control board 13 includes a power supply, a main control microcontroller chip, an infusion feedback sensor, and a wireless communication device. The power supply is a rechargeable battery. The main control microcontroller chip is electrically connected to the power supply, the infusion feedback sensor, and the wireless communication device. The power supply provides power to the overall infusion device. The main control microcontroller chip controls the infusion action of the servo motor 231. The infusion feedback sensor determines the rotation state of the servo motor 231 and the amount of medicine being infused. The wireless communication device allows the user to query information and control the infusion pump via wireless communication.

[0054] refer to Figure 12 The inlet tube 63 includes an L-shaped inlet connecting tube body 631 and an inlet needle 632; the outer end of the inlet connecting tube body 631 is perpendicular to the side wall of the outer casing 10 away from the base 50 and has an inlet port 6310; the inlet needle 632 is coaxially fixed with the inlet port 6310; one end of the inlet needle 632 extends into the inner end of the inlet tube 63, and the needle tip is located in the inlet port 6310; the part of the side wall of the outer casing 10 facing the opening of the inlet port 6310 is formed with a medicine insertion hole 100.

[0055] Working principle of Example 1: Before use, switch 12 causes servo motor 231 to drive worm gear 2331 to rotate forward via worm 232, thereby driving the transmission input driven gear 2332, which is coaxial with worm gear 2331, to rotate. Then, through the meshing intermediate transmission part 234, the transmission output part 235 is driven to rotate. The transmission output driven gear 2352 of the transmission output part 235 drives the push rod 33 to move in an arc through the output arc tooth segment 332 that meshes with it. The piston 62 connected to the push rod 33 moves inward along the chamber channel, thereby venting the gas in the chamber channel from the liquid outlet connection pipe 64. Next, the medicine bottle 200 is inserted through the medicine insertion hole 100 into the liquid inlet 6310 of the liquid inlet connection pipe body 631, so that the needle tip of the liquid inlet needle 632 is inserted into the medicine bottle 200. Then, the infusion needle 90 is inserted subcutaneously, and the infusion needle 90 and other components are positioned using the dressing 80 attached to the skin surface. Then, switch 12 causes servo motor 231 to drive worm gear 2331 to rotate in the opposite direction via worm 232, thereby driving the transmission input driven gear 2332, which is coaxial with worm gear 2331, to rotate. This rotation is then achieved through the meshing intermediate transmission part 234, which drives the transmission output part 235 to rotate. The transmission output driven gear 2352 of the transmission output part 235, through its meshing output arc tooth segment 332, drives the push rod 33, gradually pulling the piston 62 out of the chamber channel. In this way, the liquid medicine in the medicine bottle 200 can be gradually drawn into the medicine storage chamber 60 via the infusion needle 632. Following this principle, servo motor 231 is activated, causing piston 62 to move inward along the chamber channel. Thus, the liquid medicine can be gradually injected into the patient's body from the medicine storage chamber 60 via the infusion needle 90 under pressure. Next, remove the entire infusion pump and then remove and discard the disposable mechanism 40. To avoid accidental damage to the vial 200, the vial 200 can be pulled out before removing the disposable mechanism 40.

[0056] Example 2: The difference between Example 2 and Example 1 is as follows: (Refer to...) Figure 13 To prevent contamination, an outer plug 15 is detachably connected to the outer casing 10. The outer plug 15 includes an outer plug block 151 that is engaged within the medicine insertion port 100 and a connecting bolt 152 that passes through and is movably connected to the outer plug block 151. An inner plug block 65 is inserted into the liquid inlet port 6310. The inner plug block 65 includes an inner plug body 651 and a nut 652 that is embedded and fixed on the outer end face of the inner plug body 651. A needle tip groove 6510 is formed within the inner plug body 651, allowing the inner plug body 651 to cover the liquid inlet needle 632. The diameter of the inner plug body 651 is less than or equal to the diameter of the medicine insertion port 100. To prevent the connecting bolt 152 from disengaging from the outer plug block 151, a circular stop ring 1521 is fixed in the middle of the bolt stalk of the connecting bolt 152. The outer plug block 151 is located between the head of the connecting bolt 152 and the stop ring 1521.

[0057] Before infusion, the outer plug 15 and the inner plug 65 need to be removed. At this time, rotate the connecting bolt 152 to screw it into the nut 652. Then pull the connecting bolt 152 to remove the outer plug 15 and the inner plug 65 at the same time. During this process, the stop ring 1521 can play the role of lifting the outer plug 151.

[0058] Example 3: The difference between Example 3 and Example 1 is as follows: (Refer to...) Figures 14-16 To protect the medicine bottle 200, an inner connecting ring 18, coaxial with the medicine insertion hole 100, is fixed on the inner wall of the outer shell 10 away from the base 50. The protective cover 19 includes a protective cover body 191. The protective cover body 191 has at least two sliding limiting parts 192 and is evenly distributed around the circumference. Here, four sliding limiting parts 192 are taken as an example. Four evenly distributed inner guide grooves 180 are formed on the inner cylindrical surface of the inner connecting ring 18. The inner guide grooves 180 correspond one-to-one with the sliding limiting parts 192. The inner guide grooves 180 include a channel for the sliding limiting parts 192. 2. Axial sliding groove 181 for axial sliding; the axial sliding groove 181 is open at one end facing the outer shell 10. If the side wall of the medicine insertion hole 100 blocks the axial sliding groove 181, a notch that matches the axial sliding groove 181 can be opened on the circumferential surface of the medicine insertion hole 100. An arc-shaped axial limiting groove 182 for circumferential movement of the sliding limiting part 192 is formed on one of the side walls of the axial sliding groove 181 that is parallel to the axis of the protective cover body 191. All the axial limiting grooves 182 are in the same clockwise direction away from the axial sliding groove 181 they communicate with. Figure 16 As shown, it is in a counterclockwise direction; an elastic element 17 is provided inside the liquid inlet 6310, and the elastic element 17 can be a compression spring. In order to facilitate the operation of the protective cover body 191, the outer end of the protective cover body 191 extends outward into a circular outer support ring 194. The outer support ring 194 can be used to pick up the protective cover 19, and can also be used to prevent the protective cover 19 from accidentally entering the outer shell 10 completely and being inconvenient to remove.

[0059] During operation, the medicine bottle 200 is placed inside the protective cover 19. Then, the protective cover 19 and the medicine bottle 200 pass together through the medicine insertion hole 100 and the inner connecting ring post 18. At this time, the medicine bottle 200 is connected to the liquid inlet pipe 63 of the medicine storage chamber 60 and compresses the elastic element 17. During this process, the sliding limiting part 192 on the protective cover 19 slides along the corresponding axial sliding groove 181. Then, the protective cover 19 is rotated so that the sliding limiting part 192 slides circumferentially into the axial limiting groove 182. At this time, the protective cover 19... The protective cover 19 is designed to prevent the medicine bottle 200 from detaching from the inlet pipe 63. After the medicine storage chamber 60 is filled, rotating the protective cover 19 causes the sliding limit part 192 to return to the axial sliding groove 181. The elastic element 17 compressed inside the inlet port 6310 acts on the medicine bottle 200, causing the medicine bottle 200 and the protective cover 19 to detach together. This reduces the need for manual removal of the medicine bottle 200 and the protective cover 19, greatly improving ease of use. Furthermore, to prevent impact caused by the separation and reconnection of the medicine bottle 200 and the protective cover 19 when they detach together, several circumferentially distributed elastic damping elements 193 can be embedded and fixed on the inner cylindrical surface of the protective cover body 191. The elastic damping elements 193 can be made of rubber, making accidental separation less likely.

[0060] To accommodate medicine bottles 200 of varying lengths, multiple axial limiting grooves 182 are formed on the side wall of the axial sliding groove 181, where the axial limiting groove 182 is located. Figure 16 Four axial limiting grooves 182 are formed on the same side wall of the axial sliding groove 181.

[0061] Example 4: The difference between Example 4 and Example 3 is as follows: (Refer to...) Figure 6 The inner connecting ring 18 and the sliding limit part 192 are not required. It is only necessary to set the medicine insertion hole 100 as a threaded hole. The protective cover body 191 is formed with an external thread that matches the medicine insertion hole 100. At this time, the elastic damping element 193 also has the function of making the medicine bottle 200 rotate with the protective cover body 191. At this time, the elastic element 17 is not required.

[0062] In other embodiments, an elastic element 17 may be provided, but an elastic damping element 193 is not provided.

[0063] Alternatively, elastic element 17 and elastic damping element 193 can be set at the same time, so that when the protective cover 19 rotates away from the medicine insertion hole 100, the medicine bottle 200 is simultaneously removed from the liquid inlet pipe 63.

[0064] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A semi-disposable dressing infusion device, characterized in that: It includes a reusable mechanism and a disposable mechanism (40). The disposable mechanism (40) includes a drug storage tank (60) for temporarily storing liquid medicine, a dressing (80) that can be applied to the skin surface, and an infusion needle (90) that can establish a channel between the drug storage tank (60) and the human body. The reusable mechanism and the disposable mechanism (40) are detachably connected and the drug storage tank (60) can be electrically driven to feed and dispense medicine. The disposable mechanism (40) is for single-use. The reuse mechanism includes a housing (10); the throwable mechanism (40) also includes a base (50); The medicine storage compartment (60) has a liquid inlet pipe (63); the liquid inlet pipe (63) has a liquid inlet port (6310) perpendicular to the side wall of the outer shell (10) away from the base (50); a coaxial liquid inlet pin (632) is installed in the liquid inlet port (6310); the portion of the side wall of the outer shell (10) opposite the opening of the liquid inlet port (6310) is formed with a medicine insertion hole (100). The medicine insertion hole (100) is detachably connected to a protective cover (19); the protective cover (19) is used to close the medicine insertion hole (100) and cover the medicine bottle passing through the medicine insertion hole (100); The inner wall surface of the outer shell (10) away from the base (50) is provided with an inner connecting ring column (18) in the shape of a circular cylinder, coaxial with the medicine insertion hole (100); the protective cover (19) includes a protective cover body (191); the protective cover body (191) has at least two sliding limiting parts (192) and is evenly distributed around the circumference; the inner cylindrical surface of the inner connecting ring column (18) is formed with a plurality of axial sliding grooves (181) for the axial sliding of the sliding limiting parts (192); the shaft The sliding groove (181) is provided with an opening at one end facing the outer shell (10); an arc-shaped axial limiting groove (182) for the sliding limiting part (192) to move circumferentially is formed on one of the side walls of the axial sliding groove (181) parallel to the axial direction of the protective cover body (191); all the axial limiting grooves (182) are in the same clockwise direction away from the axial sliding groove (181) connected to them; an elastic element (17) is provided in the liquid inlet (6310). Multiple axial limiting grooves (182) are formed on the side wall of the axial sliding groove (181) where the axial limiting groove (182) is located.

2. The semi-disposable dressing infusion device according to claim 1, characterized in that: The reuse mechanism also includes an electric drive assembly; the electric drive assembly is installed inside the housing (10); the drug storage chamber (60), the dressing (80) and the infusion needle (90) are all disposed on the base (50); the electric drive assembly and the drug storage chamber (60) are located inside a housing formed by the detachable connection of the housing (10) and the base (50); the electric drive assembly is detachably connected to the drug storage chamber (60) and is used to drive the drug storage chamber (60) to feed and dispense drugs; the disassembly and assembly directions of the electric drive assembly and the drug storage chamber (60) are the same as the disassembly and assembly directions of the housing (10) and the base (50) and are completed simultaneously.

3. The semi-disposable dressing infusion device according to claim 2, characterized in that: The drug storage compartment (60) has a compartment channel and a piston (62) that slides back and forth in the compartment channel in a sealed manner; the electric drive assembly has a connecting pin (334) that is parallel to the disassembly and assembly direction of the outer shell (10) and the base (50); the outer end of the piston (62) is formed with a connecting hole (6230) that mates with the connecting pin (334); the electric drive assembly drives the piston (62) to slide back and forth in the compartment channel in a sealed manner through the connecting pin (334) and the connecting hole (6230) to realize drug feeding and discharging.

4. The semi-disposable dressing infusion device according to claim 3, characterized in that: The electric drive assembly includes an electric motor module (20) and a push rod module (30); the electric motor module (20) includes an electric motor housing and an electric motor (23) disposed within the electric motor housing; the electric motor (23) has a transmission output driven gear (2352); only a portion of the teeth of the transmission output driven gear (2352) of the electric motor (23) are exposed outside the electric motor housing; the push rod module (30) includes a push rod housing and a push rod that is telescopically disposed within the electric motor housing. The push rod (33) has an output arc tooth segment (332) and a connecting part; the connecting part is detachably connected to the piston (62); the output arc tooth segment (332) meshes with the transmission output driven gear (2352); when the push rod (33) extends or retracts within the push rod housing, only the teeth of the push rod (33) that mesh with the transmission output driven gear (2352) and the connecting part are exposed outside the push rod housing.

5. The semi-disposable dressing infusion device according to claim 1, characterized in that: An outer plug (15) is detachably connected to the outer casing (10); the outer plug (15) includes an outer plug block (151) detachably connected to the medicine insertion hole (100) and a connecting bolt (152) passing through and movably connected to the outer plug block (151); an inner plug body (651) is inserted into the liquid inlet (6310); the inner plug body (651) covers the liquid inlet needle (632); a nut (652) that mates with the connecting bolt (152) is fixed on the inner plug body (651); the diameter of the inner plug body (651) is less than or equal to the diameter of the medicine insertion hole (100).

6. The semi-disposable dressing infusion device according to claim 1, characterized in that: The protective cover (19) includes a protective cover body (191) that passes through and is screwed into the medicine insertion hole (100); the inner wall of the protective cover body (191) is formed with an elastic damping element (193) for holding the medicine bottle and / or the liquid inlet (6310) is provided with an elastic element (17).

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