Multi-head sequential infusion apparatus

Abstract

The multi-head sequential infusion apparatus comprises a vein needle, an adjuster, a lower catheter and a dropper which are connected in sequence, and further comprises a plurality of upper catheters and an exchange mechanism, a connecting shell is arranged on the side, away from the lower catheter, of a dropper, the upper catheters are arranged on the connecting shell, and puncture outfits are arranged at the ends, away from the connecting shell, of the upper catheters; the exchange mechanism is used for adjusting the different upper catheters to be communicated with the drip chamber and comprises a rotating disc and a driving assembly, the rotating disc is rotationally connected to the connecting shell, a through hole is formed in the rotating disc, the multiple upper catheters are located on the moving path of the through hole, and the driving assembly is used for driving the rotating disc to rotate. And when the driving assembly rotates the turntable until the through hole directly faces any upper catheter, the upper catheter is communicated with the drip chamber. The rotating disc is rotated through the driving assembly, the through holes in the rotating disc are sequentially communicated with the different upper guide pipes, liquid medicine in infusion bags where the different upper guide pipes are inserted is input into the infusion apparatus, and the infusion apparatus can input the different infusion bags in sequence conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of infusion sets, and in particular to a multi-head sequential infusion set. Background Art

[0002] An infusion set is a disposable medical consumable used for intravenous infusion. It uses atmospheric pressure and liquid static pressure. When the pressure inside the infusion system is higher than the human venous pressure, the liquid in the infusion bottle flows into the vein through the infusion hose. It is mainly composed of a puncture set, a dropper, a flow regulator, an infusion tube and a needle. The puncture set is used to insert the infusion bottle or infusion bag so that the medicine can enter the infusion set. The dropper allows medical staff to observe the dripping rate of the medicine. The flow regulator can accurately control the flow rate of the medicine and adjust it according to the patient's age, condition, etc. The infusion tube is responsible for transferring the medicine to the needle. The needle is the part that is inserted into the patient's vein. It is an indispensable tool in the process of modern medical treatment and nursing, and plays a key role in maintaining the water and salt balance of the patient's body and providing drug treatment.

[0003] Most of the infusion sets in the prior art have only one puncture device. During the infusion process, if the liquid medicine in one infusion bag is used up, it is often necessary to call medical staff to insert the puncture device into another infusion bag to continue the infusion. This process increases the workload of the medical staff. If the medical staff fails to replace the infusion bag in time, when the pressure in the blood vessel is greater than the pressure of the infusion set, it may also cause blood backflow in the patient. Summary of the invention

[0004] In order to facilitate the infusion of different infusion bags by the infusion set, the present application provides a multi-head sequential infusion infusion set.

[0005] The present application provides a multi-head sequential infusion infusion device that adopts the following technical solution: A multi-head sequential infusion infusion device comprises a venous needle, a regulator, a lower catheter and a dropper connected in sequence, and also comprises a plurality of upper catheters and a switching mechanism, wherein a connecting shell connected to the drip bucket is provided on a side of the drip bucket away from the lower catheter, a plurality of the upper catheters are respectively arranged on the connecting shell, a plurality of the upper catheters are respectively provided at one end away from the connecting shell, the switching mechanism is used to adjust different upper catheters to be connected to the drip bucket, the switching mechanism comprises a turntable and a driving assembly, the turntable is rotatably connected to the connecting shell, a through hole is provided on the turntable, a plurality of the upper catheters are respectively located on the moving path of the through hole, the driving assembly is used to drive the rotation of the turntable, and when the driving assembly rotates the turntable until the through hole faces any upper catheter, the upper catheter is connected to the drip bucket.

[0006] By adopting the above technical solution, the turntable is rotated by the driving component so that the through holes on the turntable are connected with different upper catheters in sequence, so that the infusion set can input the liquid medicine in the infusion bags inserted with different upper catheters; the medical staff can insert the puncture devices on different upper catheters into different infusion bags in sequence before infusion; during the infusion process, if the infusion bag needs to be replaced, the patient or the accompanying person only needs to rotate the turntable by the driving component, which reduces the workload of the medical staff and eliminates the need to repeatedly insert and remove the puncture device, thereby reducing the possibility of infection of viruses or pathogens by inserting and removing the puncture device, and facilitates the infusion set to input different infusion bags in sequence.

[0007] Preferably, the driving assembly includes a rotating wheel and a connecting line, a connecting pipe is provided on the lower guide tube, the rotating wheel is rotatably connected to the connecting pipe, the connecting rope is located in the connecting pipe, and the two ends of the connecting line in the length direction are respectively wound around the rotating wheel and the turntable.

[0008] By adopting the above technical solution, the rotating wheel is rotated to continue to wind the connecting wire around the rotating wheel, and the connecting wire wound around one end of the turntable is pulled out by pulling the connecting wire, so that the turntable is rotated to adjust the position of the through hole, so as to replace different infusion bags for infusion; by providing a connecting tube, the connecting wire can be protected and the position of the connecting wire can be limited, and the lower catheter can also be protected to reduce the possibility of the lower catheter being compressed and deformed.

[0009] Preferably, it also includes a limit assembly, which is used to limit the rotation of the turntable, and the limit assembly includes an abutment block and a first spring. The abutment block is slidably connected to the connecting shell along the axial direction of the turntable, and the abutment block is provided with a plurality of limit grooves. The turntable is provided with a plurality of limit blocks that can cooperate with the limit grooves. The first spring is arranged on the abutment block, and the first spring always drives the abutment block to move toward one side of the turntable. When any limit block cooperates with any limit groove, the through hole is coaxial with and connected to any upper guide tube.

[0010] By adopting the above technical scheme, when the turntable rotates, the through hole on the turntable can be coaxially arranged with the upper catheter through the cooperation between a plurality of limit grooves and a plurality of limit blocks, thereby reducing the possibility that the turntable does not rotate into place or rotates excessively to block the tube mouth of part of the upper catheter, resulting in slow outflow of the medicine in the infusion bag; when the turntable rotates, the limit block moves the abutment block toward the side away from the turntable, and when the limit block rotates to face a limit groove, the first spring drives the abutment block until the limit block cooperates with the limit groove and aligns the turntable; and by setting the limit block in a tapered shape, the cooperation between the limit groove and the limit block can guide the rotation of the turntable.

[0011] Preferably, a sealing gasket is provided at one end of the turntable away from the limit block, and a plurality of convex blocks are provided on the sealing gasket. When the turntable rotates until the through hole is coaxial with any upper conduit, the sealing gasket abuts against the pipe openings of the remaining upper conduits, and the plurality of convex blocks abut against the side walls of the remaining upper conduits respectively so that the side walls at both ends of the upper conduits move until they abut against each other.

[0012] By adopting the above technical solution, the sealing gasket is abutted against the tube openings of the remaining upper catheters, and the upper catheters are squeezed by the convex block, so as to seal the upper catheters that are not coaxial with the through hole, thereby reducing the possibility of overflow of the drug solution in the remaining upper catheters, thereby reducing the possibility of mixed injection of drug solutions in different infusion bags.

[0013] Preferably, a plug-in box is provided at one end of the connecting tube away from the turntable, a through slot is provided on the plug-in box, a sliding block is slidably connected to the plug-in box, the rotating wheel is rotatably connected to the sliding block, when the sliding block slides to the side away from the through slot to the extreme position, the plug-in box and the sliding block wrap the rotating wheel inside, and when the sliding block slides to the side of the through slot to the extreme position, part of the rotating wheel passes through the through slot to the outside.

[0014] By adopting the above technical solution, the rotating wheel is protected by arranging a plug-in box and a sliding block. When there is no need to replace the infusion bag, the rotating wheel is located in the plug-in box to reduce the possibility of replacing the infusion bag due to accidental touching of the rotating wheel; when the infusion bag needs to be replaced, force is applied to the sliding block to make the sliding block slide toward one side of the plug-in box, so that part of the rotating wheel slides to the outside through the channel; at this time, force is applied to rotate the rotating wheel, so that the connecting line is wound around the rotating wheel.

[0015] Preferably, a light spring is provided on the plug-in box, and two ends of the light spring are respectively abutted against the inside of the plug-in box and the sliding block, and the light spring always drives the sliding block to move away from the side of the plug-in box.

[0016] By adopting the above technical solution, a light spring is provided, and when force is applied to the sliding block, the light spring is deformed. When no force is applied to the sliding block, the light spring returns to its original state, thereby resetting the sliding block, facilitating the return of the rotating wheel after use, and reducing the possibility of accidentally touching the sliding block and causing the rotating wheel to be exposed to the outside world for a long time.

[0017] Preferably, the rotating wheel is provided with a plurality of ratchet grooves which are evenly distributed along the circumferential side of the rotating wheel, the sliding block is rotatably connected with a ratchet pawl which can cooperate with the ratchet groove, and the ratchet pawl is provided with a torsion spring which always drives the ratchet pawl to rotate toward one side of the rotating wheel.

[0018] By adopting the above technical solution, the rotation direction of the wheel is limited by setting the ratchet groove and the ratchet pawl, so that the wheel can only rotate to one side so that the connecting line is wound around the wheel, and it plays an anti-foolproof role, reducing the possibility of the connecting line loosening caused by the reversal of the wheel; at the same time, the rotating wheel is limited after rotation, reducing the possibility of pulling the wheel to reverse when the connecting line is taut.

[0019] The technical effects of the present invention are mainly reflected in the following aspects: 1. The present invention provides a plurality of upper catheters and a switching mechanism, and rotates the turntable through the driving component, so that the through holes on the turntable are sequentially connected with different upper catheters, so that the infusion set can be used to input the liquid medicine in the infusion bags inserted with different upper catheters; before the infusion, the medical staff can sequentially insert the puncture devices on different upper catheters into different infusion bags; during the infusion process, if the infusion bag needs to be replaced, the patient or the accompanying staff only needs to rotate the turntable through the driving component, which reduces the workload of the medical staff, eliminates the need to repeatedly insert and remove the puncture device, reduces the possibility of infection of viruses or pathogens by inserting and removing the puncture device, and facilitates the infusion set to sequentially input different infusion bags; 2. The present invention provides a rotating wheel and a connecting wire, rotates the rotating wheel to continue winding the connecting wire on the rotating wheel, and pulls the connecting wire to pull out the connecting wire wound on one end of the rotating disk, so that the rotating disk rotates to adjust the position of the through hole, thereby replacing different infusion bags for infusion; the connecting tube can protect the connecting wire and limit the position of the connecting wire, and can also protect the lower catheter, reducing the possibility of the lower catheter being compressed and deformed; 3. The present invention protects the rotating wheel by providing a plug-in box and a sliding block. When there is no need to replace the infusion bag, the rotating wheel is located in the plug-in box to reduce the possibility of replacing the infusion bag due to accidental touching of the rotating wheel. When the infusion bag needs to be replaced, force is applied to the sliding block to make the sliding block slide toward one side of the plug-in box, so that part of the rotating wheel slides to the outside through the channel. At this time, force is applied to rotate the rotating wheel to make the connecting line be wound around the rotating wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of the structure of the driving component of an embodiment of the present application.

[0022] Figure 3 is along Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4 is along Figure 2 Enlarged view of point B in the middle.

[0024] Figure 5It is a schematic diagram of the connecting shell structure of an embodiment of the present application.

[0025] Figure 6 It is a schematic diagram of the plug-in shell structure of an embodiment of the present application.

[0026] Explanation of the reference numerals: 1. intravenous needle; 2. regulator; 3. lower catheter; 4. dropper; 5. upper catheter; 6. connecting shell; 7. puncture device; 8. exchange mechanism; 81. turntable; 811. limit block; 812. sealing gasket; 813. convex block; 814. through hole; 82. drive assembly; 821. rotating wheel; 8211. ratchet groove; 822. connecting line; 823. connecting tube; 824. plug-in box; 825. through groove; 826. sliding block; 827. light spring; 828. ratchet; 829. torsion spring; 83. limit assembly; 831. abutment block; 832. limit groove; 833. first spring; 9. infusion bag. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-6 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0028] The embodiment of the present application discloses a multi-head sequential infusion infusion device.

[0029] Reference Figure 1 and Figure 2 The embodiment of the present invention is a multi-head sequential infusion infusion device, comprising a venous needle 1, a regulator 2, a lower catheter 3 and a dropper 4 which are fixedly connected in sequence from bottom to top, and also comprising three upper catheters 5 and a switching mechanism 8. A side of the dropper away from the lower catheter 3 is fixedly connected with a connection shell 6 connected to the dropper, one end of the three upper catheters 5 in the axial direction is respectively penetrated and fixedly connected in the connection shell 6, and the three upper catheters 5 are evenly distributed around the central axis of the connection shell 6, and one end of the three upper catheters 5 away from the connection shell 6 is respectively fixedly connected with a puncture device 7, and the switching mechanism 8 is used to adjust the different The upper conduit 5 is connected to the drip bucket, and the switching mechanism 8 includes a turntable 81 and a driving assembly 82. The turntable 81 is coaxial and rotatably connected to the connecting shell 6 along the axial direction of the connecting shell 6. A through hole 814 is opened on the turntable 81 along its thickness direction, and the through hole 814 is not coaxially arranged with the turntable 81. The three upper conduits 5 are respectively located on the moving path of the through hole 814. The driving assembly 82 is used to drive the rotation of the turntable 81. When the driving assembly 82 rotates the turntable 81 until the through hole 814 faces any upper conduit 5, the upper conduit 5 is connected to the drip bucket.

[0030] Reference Figure 1 and Figure 2, the turntable 81 is rotated by the driving component 82, so that the through holes 814 on the turntable 81 are connected with different upper catheters 5 in sequence, so that the infusion set can input the liquid medicine in the infusion bags 9 inserted with different upper catheters 5; before the infusion, the medical staff can insert the puncture devices 7 on different upper catheters 5 into different infusion bags 9 in sequence; during the infusion process, if the infusion bag 9 needs to be replaced, the patient or the accompanying person only needs to rotate the turntable 81 by the driving component 82, which reduces the workload of the medical staff and does not need to repeatedly insert and remove the puncture device 7, reducing the possibility of infection of viruses or pathogens by inserting and removing the puncture device 7, and making it convenient for the infusion set to input different infusion bags 9 in sequence.

[0031] Reference Figure 3-Figure 6 The driving assembly 82 includes a rotating wheel 821 and a connecting line 822. A connecting pipe 823 is fixedly connected to the circumferential side of the lower guide tube 3. A plug-in box 824 is fixedly connected to one end of the connecting pipe 823 away from the rotating disk 81 in the length direction. A through slot 825 is provided on the plug-in box 824, and a sliding block 826 is slidably connected to the plug-in box 824. A light spring 827 is fixedly connected to the plug-in box 824. The two ends of the light spring 827 in the axial direction are respectively abutted against the plug-in box 824. On the inner bottom wall and the sliding block 826, the light spring 827 always drives the sliding block 826 to move away from the plug-in box 824; the rotating wheel 821 is rotatably connected to the sliding block 826. When the sliding block 826 slides to the extreme position toward the side away from the through slot 825, the plug-in box 824 and the sliding block 826 wrap the rotating wheel 821 inside. When the sliding block 826 slides to the extreme position toward the side of the through slot 825, part of the rotating wheel 821 passes through the through slot 825 to the outside. The connecting rope is located in the connecting tube 823, and the two ends of the connecting line 822 in the length direction are respectively wound around the rotating wheel 821 and the rotating disk 81.

[0032] Reference Figure 3 and Figure 5 , rotate the rotating wheel 821 to continue winding the connecting wire 822 around the rotating wheel 821, and pull the connecting wire 822 to pull out the connecting wire 822 wound around one end of the turntable 81, so that the turntable 81 can be rotated to adjust the position of the through hole 814, so as to replace different infusion bags 9 for infusion; by setting the connecting tube 823, the connecting wire 822 can be protected and the position of the connecting wire 822 can be limited, and the lower catheter 3 can also be protected to reduce the possibility of the lower catheter 3 being compressed and deformed.

[0033] Reference Figure 4 and Figure 6, the rotating wheel 821 is protected by providing a plug-in box 824 and a sliding block 826. When there is no need to replace the infusion bag 9, the rotating wheel 821 is located in the plug-in box 824 to reduce the possibility of replacing the infusion bag 9 due to accidental touching of the rotating wheel 821; when the infusion bag 9 needs to be replaced, force is applied to the sliding block 826 to make the sliding block 826 slide toward the side of the plug-in box 824, so that part of the rotating wheel 821 slides to the outside through the channel; at this time, force is applied to rotate the rotating wheel 821, so that the connecting line 822 is wound around the rotating wheel 821.

[0034] Reference Figure 4 and Figure 6 By setting a light spring 827, when force is applied to the sliding block 826, the light spring 827 is deformed. When no force is applied to the sliding block 826, the light spring 827 returns to its original state, thereby resetting the sliding block 826, making it easier for the rotating wheel 821 to return to its original position after use, and reducing the possibility of accidentally touching the sliding block 826 and causing the rotating wheel 821 to be exposed to the outside world for a long time.

[0035] Reference Figure 3 and Figure 5 , and also includes a limiting component 83, which is used to limit the rotation of the turntable 81. The limiting component 83 includes an abutment block 831 and a first spring 833. The abutment block 831 is slidably connected to the connecting shell 6 along the axial direction of the turntable 81. A plurality of limiting grooves 832 are provided on the side surface of the abutment block 831 close to the turntable 81 in the axial direction. The plurality of limiting grooves 832 are evenly distributed around the central axis of the abutment block 831. The turntable 81 is fixedly connected with a plurality of limiting blocks 811 that can cooperate with the limiting grooves 832. The plurality of limiting blocks 811 are fixedly connected to the turntable 81. 11 are evenly distributed around the center axis of the turntable 81, and a plurality of limit blocks 811 are arranged in a tapered shape from one end close to the turntable 81 to the end away from the turntable 81, a first spring 833 is fixedly connected to the abutment block 831, and two ends of the first spring 833 in the axial direction abut against the abutment block 831 and the inner bottom wall of the connecting shell 6 respectively, and the first spring 833 always drives the abutment block 831 to move toward one side of the turntable 81, and when any limit block 811 cooperates with any limit groove 832, the through hole 814 is coaxial with and connected to any upper guide tube 5.

[0036] Reference Figure 3 and Figure 5When the turntable 81 rotates, the through hole 814 on the turntable 81 can be coaxially arranged with the upper catheter 5 through the cooperation between the plurality of limit grooves 832 and the plurality of limit blocks 811, thereby reducing the possibility that the turntable 81 is not rotated properly or rotates excessively to block the tube mouth of part of the upper catheter 5, resulting in slow outflow of the Chinese medicine in the infusion bag 9; when the turntable 81 rotates, the limit block 811 causes the abutment block 831 to move toward the side away from the turntable 81, and when the limit block 811 rotates to face the limit groove 832, the first spring 833 drives the abutment block 831 until the limit block 811 cooperates with the limit groove 832 and aligns the turntable 81; and by making the limit block 811 be arranged in a tapered shape, the cooperation between the limit groove 832 and the limit block 811 can guide the rotation of the turntable 81.

[0037] Reference Figure 3 and Figure 5 A sealing gasket 812 is fixedly connected to one end of the turntable 81 away from the limit block 811, and four convex blocks 813 are fixed on the sealing gasket 812. The four convex blocks 813 are divided into two groups, two in a group, and the two convex blocks 813 in the same group are arranged opposite to each other. When the turntable 81 rotates until the through hole 814 is coaxial with any upper conduit 5, the sealing gasket 812 abuts against the pipe openings of the other two upper conduits 5, and the two groups of convex blocks 813 abut against the side walls of the other two upper conduits 5 respectively. The two convex blocks 813 in the same group abut against the side surfaces of the upper conduit 5 on both sides in the circumferential direction, so that the opposite side walls of the upper conduit 5 move to abut each other. By making the sealing gasket 812 abut against the tube openings of the remaining upper catheters 5 and squeezing the upper catheters 5 through the convex block 813, the upper catheters 5 that are not coaxial with the through hole 814 are sealed, thereby reducing the possibility of overflow of the drug solution in the remaining upper catheters 5, thereby reducing the possibility of mixed injection of drug solutions in different infusion bags 9.

[0038] Reference Figure 4 and Figure 6 The rotating wheel 821 is provided with a plurality of ratchet grooves 8211, which are evenly distributed around the circumferential side of the rotating wheel 821. A ratchet 828 that can cooperate with the ratchet groove 8211 is rotatably connected to the sliding block 826, and a torsion spring 829 is fixedly connected to the ratchet 828. One end of the torsion spring 829 away from the ratchet 828 is fixedly connected to the sliding block 826, and the torsion spring 829 always drives the ratchet 828 to rotate toward one side of the rotating wheel 821. By providing the ratchet grooves 8211 and the ratchet 828, the rotation direction of the rotating wheel 821 is limited, so that the rotating wheel 821 rotates only toward one side so that the connecting wire 822 is wound around the rotating wheel 821, and the foolproof function is played, reducing the possibility of the connecting wire 822 being loosened due to the reversal of the rotating wheel 821; at the same time, the rotating wheel 821 is limited after rotation, reducing the possibility of pulling the rotating wheel 821 to reverse when the connecting wire 822 is tight.

[0039] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A multi-head sequential infusion infusion device, comprising a venous needle (1), a regulator (2), a lower catheter (3) and a dropper (4) connected in sequence, characterized in that: The invention also comprises a plurality of upper conduits (5) and a switching mechanism (8). A connection shell (6) communicating with the dripping funnel is provided on a side of the dripping funnel away from the lower conduit (3). The plurality of upper conduits (5) are respectively arranged on the connection shell (6). A puncture device (7) is respectively provided on one end of the plurality of upper conduits (5) away from the connection shell (6). The switching mechanism (8) is used to adjust different upper conduits (5) to be connected with the dripping funnel. The switching mechanism (8) comprises a rotating disk (81) and a driving assembly (82). The rotating disk (81) is rotatably connected with the connection shell (6). A through hole (814) is provided on the rotating disk (81). The plurality of upper conduits (5) are respectively located on the moving path of the through hole (814). The driving assembly (82) is used to drive the rotation of the rotating disk (81). When the driving assembly (82) rotates the rotating disk (81) until the through hole (814) faces any upper conduit (5), the upper conduit (5) is connected with the dripping funnel.

2. A multi-head sequential infusion infusion device according to claim 1, characterized in that: The driving assembly (82) comprises a rotating wheel (821) and a connecting line (822); a connecting pipe (823) is provided on the lower guide tube (3); the rotating wheel (821) is rotatably connected to the connecting pipe (823); the connecting rope is located in the connecting pipe (823); and the two ends of the connecting line (822) in the length direction are respectively wound around the rotating wheel (821) and the rotating disk (81).

3. A multi-head sequential infusion infusion device according to claim 2, characterized in that: The invention also comprises a limiting assembly (83), wherein the limiting assembly (83) is used for limiting the rotation of the rotating disk (81), and the limiting assembly (83) comprises an abutting block (831) and a first spring (833). The abutting block (831) is slidably connected to the connecting shell (6) along the axial direction of the rotating disk (81), and a plurality of limiting grooves (832) are provided on the abutting block (831). The rotating disk (81) is provided with a plurality of limiting blocks (811) that can cooperate with the limiting grooves (832). The first spring (833) is arranged on the abutting block (831), and the first spring (833) always drives the abutting block (831) to move toward one side of the rotating disk (81). When any limiting block (811) cooperates with any limiting groove (832), the through hole (814) is coaxial with and connected to any upper guide tube (5).

4. A multi-head sequential infusion infusion device according to claim 3, characterized in that: A sealing gasket (812) is provided at one end of the rotating disk (81) away from the limiting block (811), and a plurality of convex blocks (813) are provided on the sealing gasket (812). When the rotating disk (81) rotates until the through hole (814) is coaxial with any upper conduit (5), the sealing gasket (812) abuts against the pipe openings of the remaining upper conduits (5), and the plurality of convex blocks (813) abut against the side walls of the remaining upper conduits (5) respectively, so that the side walls at both ends of the upper conduits (5) move to abut against each other.

5. The multi-head sequential infusion infusion device according to claim 3, characterized in that: A plug-in box (824) is provided at one end of the connecting tube (823) away from the rotating disk (81); a through slot (825) is provided on the plug-in box (824); a sliding block (826) is slidably connected to the plug-in box (824); the rotating wheel (821) is rotatably connected to the sliding block (826); when the sliding block (826) slides to the side away from the through slot (825) to an extreme position, the plug-in box (824) and the sliding block (826) wrap the rotating wheel (821); when the sliding block (826) slides to the side of the through slot (825) to an extreme position, a part of the rotating wheel (821) passes through the through slot (825) to the outside.

6. The multi-head sequential infusion infusion device according to claim 5, characterized in that: The plug-in box (824) is provided with a light spring (827), the two ends of which are respectively in contact with the inside of the plug-in box (824) and the sliding block (826), and the light spring (827) always drives the sliding block (826) to move away from one side of the plug-in box (824).

7. The multi-head sequential infusion infusion device according to claim 5, characterized in that: The rotating wheel (821) is provided with a plurality of ratchet grooves (8211), and the plurality of ratchet grooves (8211) are evenly distributed along the circumferential side of the rotating wheel (821); a ratchet pawl (828) that can cooperate with the ratchet groove (8211) is rotatably connected to the sliding block (826), and a torsion spring (829) is provided on the ratchet pawl (828), and the torsion spring (829) always drives the ratchet pawl (828) to rotate toward one side of the rotating wheel (821).

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