Infusion device

Abstract

The invention relates to the technical field of medical equipment, and discloses an infusion device which comprises an infusion support, the infusion support comprises a base and a balance unit, the balance unit comprises a first balance ring and a second balance ring which are concentrically arranged, and the two opposite sides of the first balance ring and the two opposite sides of the second balance ring are hinged; a balancing weight concentric with the first balancing ring is arranged below the first balancing ring, the top of the balancing weight is fixedly connected with two connecting strips located in the second balancing ring, the two opposite sides of the second balancing ring are hinged to the two connecting strips respectively, and the connecting line of the hinge points of the first balancing ring and the second balancing ring is perpendicular to the connecting line of the hinge points of the second balancing ring and the connecting strips. The first balance ring is fixedly connected with an L-shaped connecting rod, the L-shaped connecting rod is detachably connected with the base, and the top of the connecting strip is fixedly connected with an anti-disengaging positioning mechanism used for fixing an infusion bottle and a bottle inserting needle. According to the technical scheme, the problems that a bottle inserting needle of an existing infusion device is prone to falling off when a patient moves, the infusion speed is unstable, and the patient is inconvenient to move can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an infusion device. Background Art

[0002] Infusion is a very common method in clinical treatment. Existing infusion devices are mainly composed of infusion sets and infusion stands. Infusion sets generally include an infusion hose and an intravenous needle. The intravenous needle and the infusion hose are detachably connected. The infusion hose is provided with a bottle insertion needle, an air inlet pipe, a drip bucket and a flow rate regulator in sequence. The limit plates symmetrically arranged on both sides of the bottle insertion needle can assist in puncture positioning. The normal operation process is: first hang the infusion bottle on the infusion stand, then insert the bottle insertion needle into the rubber bottle mouth of the infusion bottle, make the infusion hose vertically downward, connect the intravenous needle, puncture into the patient's blood vessel and start infusion.

[0003] However, the existing device has significant safety risks: when the patient gets up or goes to the toilet, the infusion hose may be accidentally pulled, causing the bottle needle to fall out. Clinical studies have shown (Journal of Nursing, 2024) that the infusion interruption rate caused by patient activity is as high as 12.3%, of which 68% is directly caused by the bottle needle falling off. This phenomenon not only leads to treatment interruption, but also may cause infusion set contamination and increase the risk of secondary puncture.

[0004] At the same time, traditional fixed infusion stands cannot meet the patient's mobility needs, and patients need to hold the infusion bottle by themselves when they move. This method has multiple hidden dangers: the height of the bottle is unstable, resulting in fluctuations in the infusion speed; continuous arm raising causes muscle strain, especially for elderly or weak patients; hand shaking increases the risk of intravenous needle displacement, and data shows that the displacement rate increases by 37%. For children and emotionally sensitive patients, holding a shaking infusion bottle can easily cause psychological anxiety, forming a double physical and psychological burden. Summary of the invention

[0005] The present invention aims to provide an infusion device to solve the problems of the existing infusion device, such as the easy falling off of the bottle needle when the patient moves, the unstable infusion speed and the inconvenience of the patient moving.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an infusion device, including an infusion bracket, the infusion bracket includes a base and a balancing unit, the balancing unit includes a concentrically arranged No. 1 balancing ring and a No. 2 balancing ring, the No. 1 balancing ring and the No. 2 balancing ring are hinged on opposite sides, and the line connecting the two hinge points passes through the center of the No. 1 balancing ring; a counterweight block concentric with the No. 1 balancing ring is provided below the No. 1 balancing ring, and two connecting strips located inside the No. 2 balancing ring are fixedly connected to the top of the counterweight block, and the opposite sides of the No. 2 balancing ring are respectively hinged on the two connecting strips, and the line connecting the two hinge points also passes through the center of the No. 1 balancing ring, and the line connecting the hinge points of the No. 1 balancing ring and the No. 2 balancing ring and the line connecting the hinge points of the No. 2 balancing ring and the connecting strip are perpendicular to each other; an L-shaped connecting rod is fixedly connected to the No. 1 balancing ring, the L-shaped connecting rod is detachably connected to the base, and an anti-slip positioning mechanism for fixing the infusion bottle and the bottle insertion needle is fixedly connected to the top of the connecting strip.

[0007] The beneficial effects of this solution are as follows: since the base and the L-shaped connecting rod are detachably connected, when the patient needs to get up and move around, the L-shaped connecting rod can be easily removed from the base, and then the patient can walk freely holding the L-shaped connecting rod. When the patient is walking, when the L-shaped connecting rod shakes along the line connecting the hinge points of the No. 1 balance circle and the No. 2 balance circle, the No. 1 balance circle will rotate around its hinge point with the No. 2 balance circle. At this time, the No. 2 balance circle and the infusion bottle on the anti-slip positioning mechanism can remain relatively still due to the counterbalancing effect of the counterweight block; when the L-shaped connecting rod shakes along the line connecting the No. 2 balance circle and the hinge point of the connecting strip, the No. 1 balance circle and the No. 2 balance circle will rotate as a whole along their hinge points with the connecting strip, and the infusion bottle on the anti-slip positioning mechanism will remain still. In this way, the infusion bottle can always be in a stable state while the patient is walking, which greatly reduces shaking, ensures a steady infusion speed, and improves the patient's infusion experience during activities.

[0008] Due to the setting of the anti-dropping positioning mechanism, this technical solution can fix the infusion bottle and the bottle insertion needle, which can effectively prevent the bottle insertion needle from falling off the infusion bottle, avoid infusion interruption and infusion device contamination, and greatly ensure the smoothness and safety of the infusion process.

[0009] Furthermore, the anti-slip positioning mechanism includes a positioning unit and an anti-slip unit. The positioning unit includes a positioning cylinder. The positioning cylinder is provided with two relatively arranged clamping parts, the clamping parts are used to fix the infusion bottle, and the bottom of the positioning cylinder is provided with a through hole for the infusion bottle plug to pass through; the anti-slip unit includes a fixing seat, the fixing seat is fixedly connected to the bottom of the positioning cylinder, and the fixing seat is provided with two relatively arranged anti-slip parts, the anti-slip parts are used to fix the bottle insertion needle.

[0010] The beneficial effects of this solution are as follows: the positioning cylinder in the positioning unit works in conjunction with the two relatively arranged clamping parts, and can be flexibly adjusted according to the size of the infusion bottle. When the infusion bottle is inverted in the positioning cylinder, the clamping part can fit tightly against the outer wall of the infusion bottle, providing a stable clamping force from both sides, effectively preventing the infusion bottle from shaking or shifting during use, and ensuring the stability of the infusion bottle during the infusion process. The fixing seat of the anti-slip unit is connected to the bottom of the positioning cylinder, and the through hole at the bottom of the positioning cylinder facilitates the passage of the bottle stopper of the infusion bottle. The relatively arranged anti-slip parts on the fixing seat can accurately clamp the bottle insertion needle. During the infusion process, even if the infusion hose is accidentally pulled, the anti-slip part can provide reliable fixation for the bottle insertion needle to prevent it from falling off the infusion bottle, avoiding problems such as infusion interruption and contamination of the infusion device. The positioning unit and the anti-slip unit cooperate with each other to reinforce the two key parts of the infusion bottle and the bottle insertion needle at the same time, greatly improving the overall reliability and safety of the infusion device, and providing strong protection for the patient's infusion treatment process.

[0011] Furthermore, each anti-slip part includes a threaded rod, which is threadedly connected to the side wall of the fixed seat, and a limiting block is rotatably connected to the threaded rod. The limiting block is fixedly connected to a guide rod, and the free end of the guide rod is slidably set on the fixed seat. A limiting groove is provided on the upper side of the limiting block.

[0012] The beneficial effects of this solution are as follows: This technical solution can flexibly adjust the position of the limit block by rotating the threaded rod, so as to accurately control the clamping force according to the actual situation of the bottle insertion needle. This design enables the bottle insertion needle to be firmly fixed on the infusion bottle, effectively preventing it from loosening and falling off due to external forces. The guide rod provides a stable guide for the movement of the limit block, ensuring that its movement process is smooth and the positioning is accurate, greatly improving the reliability of fixation. In addition, the limit groove on the upper side of the limit block can clamp the limit plate on the bottle insertion needle to constrain the position of the bottle insertion needle, further enhancing the stability of the connection between the bottle insertion needle and the infusion bottle, reducing the risk of infusion, and effectively ensuring a smooth infusion process.

[0013] Furthermore, it also includes an infusion set, which includes an infusion hose and an intravenous needle. The infusion hose is provided with a bottle insertion needle, an air inlet pipe, a drip bucket and a flow rate regulator in sequence. The intravenous needle is detachably connected to one end of the infusion hose close to the flow rate regulator. A filter is provided on the infusion hose between the drip bucket and the flow rate regulator, and an anti-backflow unit is provided on the infusion hose between the filter and the flow rate regulator.

[0014] The beneficial effects of this solution are: when the patient is asleep and the drug delivery is completed, the anti-backflow unit, with its unique one-way conduction design, can effectively prevent blood from flowing back into the infusion hose, avoid problems such as infusion tube blockage and thrombosis caused by blood reflux, ensure the smooth flow of the infusion line, and lay the foundation for the smooth implementation of subsequent infusion operations. The setting of the filter can filter the drug solution, reduce the risk of infusion reactions caused by impurities, and prevent these impurities from adhering to the inside of the anti-backflow unit, ensuring that the anti-backflow unit is always in normal working condition and avoiding accidental interruption of the infusion process due to blockage.

[0015] Furthermore, the anti-backflow unit includes an anti-backflow tube, the interior of which is provided with a main liquid inlet channel, a main liquid outlet channel and a plurality of anti-backflow parts, each of which includes a No. 1 diversion channel, a No. 2 diversion channel and an air bag, the air bag is fixedly connected in the anti-backflow tube between the No. 1 diversion channel and the No. 2 diversion channel, one end of the main liquid inlet channel close to the filter is connected to the infusion hose, and the other end is connected to the No. 1 diversion channel and the No. 2 diversion channel, adjacent anti-backflow parts are connected in sequence, the end of the anti-backflow part is connected to the main liquid outlet channel, and the end of the main liquid outlet channel close to the flow rate regulator is connected to the infusion hose.

[0016] The beneficial effects of this solution are as follows: Due to the special design of the airbag and the No. 2 shunt channel, when delivering liquid medicine, the liquid medicine enters the main liquid inlet channel after being filtered by the filter, and then passes through a number of anti-reflux parts for shunting, and finally enters the infusion hose through the main liquid outlet channel to complete the delivery to the patient. When blood returns, due to the special design of the No. 2 shunt channel, when the blood flows to the intersection of the No. 1 shunt channel and the No. 2 shunt channel, vortices and energy loss will continue to form, thereby preventing blood from flowing back.

[0017] Furthermore, a puncture air supply unit is provided at the bottom of each limit block, and sealed air bags are symmetrically fixedly connected on both sides of the bottle insertion needle. Each air bag is connected to a connecting tube, and the free end of the connecting tube is connected to one of the air bags. The air bag is provided with an exhaust pipe, and an exhaust valve is installed on the exhaust pipe. The side wall of the positioning cylinder is a hollow structure. The puncture air supply unit can puncture the air bag and supply air to the air bag through the connecting tube.

[0018] The beneficial effects of this solution are: during the infusion process, when the drug solution is delivered, the puncture air supply unit can puncture the air bag and supply air to the air bag through the connecting tube. After the air bag is inflated, it will block the shunt channel, which can effectively prevent air from entering the infusion hose under the anti-reflux tube, thereby greatly reducing the risk of air embolism and providing reliable protection for the patient's infusion safety. The hollow positioning cylinder not only ensures the structural strength, but also realizes the visualization of the infusion status.

[0019] When the puncture needle punctures the air bag, it will leave a clear mark on the air bag. This mark is like a special "sign", clearly indicating that the infusion tube has been used. With this obvious mark, medical staff can quickly and accurately identify the use status of the infusion tube in subsequent management or in medical supplies traceability, effectively avoiding the incorrect reuse of used infusion tubes and ensuring the safety and standardization of medical operations.

[0020] Furthermore, each puncture air supply unit includes a piston cylinder and a driving member, a handle is fixedly connected to the limit block, a piston rod is fixedly connected to the handle, a piston is fixedly connected to the free end of the piston rod, a rubber sealing ring is provided on the outer circumferential surface of the piston, the piston seal is slidably arranged in the piston cylinder, a fixed bracket is fixedly connected to the fixed seat, the piston cylinder is installed on the fixed bracket, an air outlet pipe is connected to the piston cylinder, a one-way valve is installed on the air outlet pipe, the driving member is installed on the fixed seat below the fixed bracket, a puncture needle is installed on the output shaft of the driving member, the puncture needle adopts a hollow structure design, a sharp puncture hole is provided at the free end, and the lower end of the air outlet pipe is connected to the inside of the puncture needle.

[0021] The beneficial effects of this solution are as follows: This technical solution ingeniously adopts the linkage design of the puncture air supply unit and the limit block. In actual operation, when the limit block moves with the piston rod, the piston connected to it will move synchronously in the piston cylinder, thereby generating a compressed airflow. When the patient observes that the drug solution has been delivered, the drive member can be started. The drive member can accurately push the puncture needle toward the side close to the air bag until the puncture needle pierces the air bag and enters its interior. At this time, open the one-way valve, and the compressed air flow will pass through the channel formed by the air outlet pipe and the puncture needle to smoothly inflate the airbag. As the gas is continuously filled, the airbag gradually expands. The airbag will simultaneously block the shunt channel, which can effectively prevent air from entering the infusion hose under the anti-reflux tube, thereby greatly reducing the risk of air embolism formation and providing reliable protection for the patient's infusion safety.

[0022] Furthermore, a hook is fixedly connected to the No. 1 balance ring.

[0023] The beneficial effect of this solution is that when the patient needs to go to the toilet, the hook can be hung on a stable fixed structure such as a door, so that the use of the entire device is not limited by location, it can adapt to complex medical scenarios, and its flexibility is greatly increased.

[0024] Furthermore, it also includes a control unit, which includes a controller. A photoelectric reflective liquid level sensor is installed on the inner wall of the positioning cylinder, and the photoelectric reflective liquid level sensor, the driving member, and the one-way valve are all electrically connected to the controller.

[0025] The beneficial effects of this solution are: during the infusion process, if the patient falls asleep, the photoelectric reflective liquid level sensor will play an important role and detect the liquid level information in the infusion bottle in real time. Once the liquid level in the infusion bottle drops below the preset value, the controller will control the one-way valve to open. Under this operation, the airflow previously generated by the compression of the piston in the piston cylinder will pass through the channel formed by the outlet pipe and the puncture needle and smoothly inflate the airbag. As the gas is continuously filled in, the airbag gradually expands. The bag will simultaneously block the two anti-reflux parts. This double blocking method can effectively prevent air from entering the infusion hose below the anti-reflux tube, thereby avoiding the medical risks that may be caused by the entry of air, and providing a more reliable guarantee for the patient's infusion safety.

[0026] Furthermore, the control unit also includes an alarm, which is electrically connected to the controller.

[0027] The beneficial effects of this solution are: during the infusion process, the photoelectric reflective liquid level sensor can detect the liquid level information in the infusion bottle in real time. Once the liquid level in the infusion bottle drops below the preset value, the controller will respond quickly. The control alarm will sound an alarm to remind patients and nurses to pay attention to the infusion situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of an infusion device in Example 1 of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the anti-dropping positioning mechanism in Example 1 of the present invention;

[0030] Figure 3 Schematic diagram of the structure of the infusion set in Embodiment 2 of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the anti-drop positioning mechanism and the puncture air supply unit in Embodiment 3 of the present invention;

[0032] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0033] Figure 6 It is a structural schematic diagram of the cooperation between the anti-slip positioning mechanism and the puncture air supply unit in Example 4 of the present invention. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The reference numerals in the drawings of the specification include: infusion set 1, infusion hose 2, intravenous needle 3, bottle needle 4, air inlet pipe 5, drip bucket 6, flow rate regulator 7, limit plate 8, base 9, No. 1 balance ring 10, No. 2 balance ring 11, counterweight 12, connecting strip 13, through hole 14, L-shaped connecting rod 15, hook 16, positioning cylinder 17, infusion bottle 18, push-pull rod 19, arc clamping block 20, elastic member 21, locking member 22, fixing seat 2 3. threaded rod 24, limit block 25, guide rod 26, filter 27, anti-backflow pipe 28, main liquid inlet channel 29, main liquid outlet channel 30, No. 1 shunt channel 31, No. 2 shunt channel 32, air bag 33, piston rod 34, handle 35, piston cylinder 36, fixed bracket 37, drive member 38, puncture needle 39, air bag 40, air outlet pipe 41, connecting pipe 42, photoelectric reflective liquid level sensor 43, positioning groove 44, limit groove 45.

[0036] Example 1

[0037] like Figure 1 The infusion device shown includes an infusion support and an infusion set 1. The infusion set 1 adopts an existing structure, including an infusion hose 2 and a venous needle 3. The venous needle 3 is detachably connected to the infusion hose 2. The infusion hose 2 is provided with a bottle insertion needle 4, an air inlet pipe 5, a drip bucket 6 and a flow rate regulator 7 in sequence. The bottle insertion needle 4 is symmetrically provided with limit plates 8 on both sides.

[0038] like Figure 1 As shown, the infusion support comprises a base 9, to which a balancing unit is detachably connected, and an anti-drop positioning mechanism is fixedly connected to the top of the balancing unit.

[0039] like Figure 1 As shown, the balancing unit includes a concentrically arranged balancing ring 10 and a second balancing ring 11. The front and rear sides of the first balancing ring 10 and the second balancing ring 11 are both hinged, and the line connecting the two hinge points passes through the center of the circle of the first balancing ring 10. At the same time, there is a gap between the first balancing ring 10 and the second balancing ring 11. A counterweight block 12 is arranged concentrically with the first balancing ring 10 below the first balancing ring 10. Two connecting bars 13 are welded on the top of the counterweight block 12. The two connecting bars 13 are both located inside the second balancing ring 11. The left and right sides of the second balancing ring 11 are respectively hinged on the two connecting bars 13, and the line connecting the hinge points on the left and right sides also passes through the center of the circle of the first balancing ring 10. The line connecting the hinge points of the first balancing ring 10 and the second balancing ring 11 and the line connecting the hinge points of the second balancing ring 11 and the connecting bar 13 are perpendicular to each other, and a through hole 14 is opened on the counterweight block 12.

[0040] like Figure 1As shown, an L-shaped connecting rod 15 is welded on the right side of the No. 1 balance ring 10. The lower end of the L-shaped connecting rod 15 is a retractable structure and is connected to the base 9 by a snap-on method. A hook 16 is welded on the left side of the No. 1 balance ring 10. When the patient needs to get up and move around, the LL-shaped connecting rod 15 can be removed from the base 9 first. Since the lower end of the connecting rod is retractable, the patient can walk conveniently by holding it, and the adjustable length can better adapt to different heights and support requirements; when the patient needs to go to the toilet, the hook 16 can also be hung on a stable fixed structure such as a door, so that the entire device can be stably placed in a specific scenario.

[0041] like Figure 1-2 As shown, the anti-slipping positioning mechanism includes a positioning unit and an anti-slipping unit.

[0042] like Figure 2 As shown, the positioning unit includes a positioning cylinder 17 and two clamping parts. The positioning cylinder 17 is welded to the top of the connecting strip 13. It is a cylindrical structure with an open upper end and a sealed lower end. A through hole is provided at the bottom of the positioning cylinder 17 for the plug of the infusion bottle 18 to pass through. The two clamping parts are relatively arranged on the left and right sides of the positioning cylinder 17. Each clamping part includes a push-pull rod 19. The upper side surface of the push-pull rod 19 is provided with a positioning groove 44 along its axial direction. One end of the push-pull rod 19 passes through the side wall of the positioning cylinder 17 and is slidably connected to the positioning cylinder 17. An arc-shaped clamping block 20 is welded to one end of the push-pull rod 19 located inside the positioning cylinder 17. An elastic member 21 is sleeved on the push-pull rod 19 between the arc-shaped clamping block 20 and the positioning cylinder 17. One end of the elastic member 21 is welded to the arc-shaped clamping block 20, and the other end is welded to the inner side wall of the positioning cylinder 17. The top of the positioning cylinder 17 is detachably connected with a locking member 22, and the lower end of the locking member 22 can be against the positioning groove 44, so as to position the push-pull rod 19. In this embodiment, the elastic member 21 is a spring, and the locking member 22 is a locking bolt, which is threadedly connected to the positioning cylinder 17.

[0043] like Figure 2 As shown, the anti-slip unit is arranged below the positioning cylinder 17. Specifically, the bottle insertion needle 4 includes a fixing seat 23 and two anti-slip parts. The fixing seat 23 is U-shaped and welded to the bottom of the positioning cylinder 17. The two anti-slip parts are relatively arranged on the left and right sides of the fixing seat 23. Each anti-slip part includes a threaded rod 24, which is threadedly connected to the side wall of the fixing seat 23. The threaded rod 24 is rotatably connected to a limit block 25. A guide rod 26 is welded to the limit block 25. The guide rod 26 is slidably arranged on the fixing seat 23. A limit groove 45 is opened on the upper side of the limit block 25.

[0044] The specific implementation process is as follows:

[0045] When in use, first, invert the infusion bottle 18 and place it in the positioning cylinder 17, so that the bottle plug of the infusion bottle 18 passes through the through hole and is located below the positioning cylinder 17. Next, twist the two locking members 22 to release the constraint on the push-pull rod 19, and then push the two push-pull rods 19 in the direction close to the infusion bottle 18, and use the two arc-shaped clamping blocks 20 to clamp the bottle body of the infusion bottle 18. After that, twist the two locking members 22 again, so that the lower end of the locking members 22 is against the positioning groove 44, and the push-pull rod 19 is positioned. Then, insert the bottle needle 4 of the infusion device 1 into the rubber bottle mouth of the infusion bottle 18. Finally, twist the two threaded rods 24 to drive the two limit blocks 25 to move to the side close to the bottle needle 4, so as to clamp the bottle needle 4, and at the same time, the limit plate 8 on the bottle needle 4 will be stuck in the limit groove 45, so that the bottle needle 4 can be effectively prevented from falling off.

[0046] Example 2

[0047] On the basis of Example 1, Figure 3 As shown, a filter 27 is provided on the infusion hose 2 between the drip bucket 6 and the flow rate regulator 7, and an anti-backflow unit is provided on the infusion hose 2 between the filter 27 and the flow rate regulator 7. The filter 27 can filter the liquid medicine, reduce the risk of infusion reaction caused by impurities, and prevent these impurities from adhering to the inside of the anti-backflow unit, ensuring that the anti-backflow unit is always in normal working condition, avoiding accidental interruption of the infusion process due to blockage.

[0048] like Figure 3 As shown, the anti-backflow unit includes an anti-backflow tube 28, and the interior of the anti-backflow tube 28 is provided with a main liquid inlet channel 29, a main liquid outlet channel 30 and a plurality of anti-backflow parts, each of which includes a No. 1 shunt channel 31, a No. 2 shunt channel 32 and an air bag 33, and the air bag 33 is glued to the anti-backflow tube 28 between the No. 1 shunt channel 31 and the No. 2 shunt channel 32. The end of the main liquid inlet channel 29 close to the filter 27 is connected to the infusion hose 2, and the other end is connected to the No. 1 shunt channel 31 and the No. 2 shunt channel 32. Adjacent anti-backflow parts are connected in sequence, and the end of the anti-backflow part is connected to the main liquid outlet channel 30, and the end of the main liquid outlet channel 30 close to the flow rate regulator 7 is connected to the infusion hose 2. For the convenience of illustration, Figure 3 The number of the middle backflow prevention parts is two, but it is not limited thereto, and the number of the backflow prevention parts can be flexibly set according to actual conditions.

[0049] When delivering liquid medicine, the liquid medicine enters the main liquid inlet channel 29 after being filtered by the filter 27, and then passes through a number of anti-backflow parts for diversion in turn, and finally enters the infusion hose 2 through the main liquid outlet channel 30 to complete the delivery to the patient. When the infusion hose 2 returns blood, due to the special design of the second diversion channel 32, when the blood flows to the intersection of the first diversion channel 31 and the second diversion channel 32, vortices and energy loss will be continuously formed, thereby preventing blood from flowing back.

[0050] Example 3

[0051] On the basis of Example 2, Figure 4 and Figure 5 As shown, a puncture air supply unit is provided at the bottom of each limit block 25, and each puncture air supply unit includes a piston rod 34, a piston, a piston cylinder 36 and a driving member 38. A handle 35 is welded to the bottom of the limit block 25, the piston rod 34 is welded to the right side of the handle 35, the piston is welded to the right end of the piston rod 34, a rubber sealing ring is provided on the outer circumferential surface of the piston, and the piston seal is slidably arranged in the piston cylinder 36, a fixed bracket 37 is welded to the left side of the fixed seat 23, the piston cylinder 36 is installed on the fixed bracket 37 by bolts, and the right end of the piston cylinder 36 is connected to the air outlet pipe 41, and a one-way valve is installed on the air outlet pipe 41.

[0052] The driving member 38 is installed on the fixing seat 23 below the fixing bracket 37. A puncture needle 39 is installed on the output shaft of the driving member 38. The puncture needle 39 adopts a hollow structure design and has a sharp puncture hole at the right end. The lower end of the air outlet pipe 41 is connected to the inside of the puncture needle 39.

[0053] The left and right sides of the bottle insertion needle 4 are symmetrically glued with sealed air bags 40, and the bottom of each air bag 40 is connected with a connecting pipe 42. The left air bag 40 is connected with one of the air bags 33 through the connecting pipe 42, and the right air bag 40 is connected with the other air bag 33 through the connecting pipe 42. An exhaust pipe is provided on the air bag 33, and an exhaust valve is installed on the exhaust pipe. The side wall of the positioning cylinder 17 is a hollow structure. In this embodiment, the driving member 38 uses a cylinder with a model of SCJ32.

[0054] This technical solution ingeniously adopts the linkage design of the puncture air supply unit and the limit block 25. In actual operation, when the limit block 25 moves with the piston rod 34, the piston connected thereto will move synchronously in the piston cylinder 36, thereby generating a compressed air flow. When the patient observes that the drug solution has been delivered, the drive member 38 can be started. The drive member 38 can accurately push the puncture needle 39 to move toward the side close to the air bag 40 until the puncture needle 39 pierces the air bag 40 and enters the interior. At this time, open the one-way valve, and the compressed air flow will pass through the channel formed by the outlet pipe 41 and the puncture needle 39 to smoothly inflate the air bag 33.

[0055] As the gas is continuously filled, the airbag 33 gradually expands. The airbag 33 will simultaneously block the two anti-backflow parts. This double blocking method can effectively prevent air from entering the infusion hose 2 below the anti-backflow tube 28, thereby greatly reducing the risk of air embolism and providing reliable protection for the patient's infusion safety. The hollow positioning cylinder 17 not only ensures structural strength, but also realizes visualization of the infusion status.

[0056] When the puncture needle 39 punctures the air bag 40, a clear mark will be left on the air bag 40. This mark is like a special "sign", clearly indicating that the infusion tube has been used. With this obvious mark, medical staff can quickly and accurately identify the use status of the infusion tube in subsequent management or in the traceability of medical supplies, effectively avoiding the incorrect reuse of the used infusion tube and ensuring the safety and standardization of medical operations.

[0057] Example 4

[0058] On the basis of Example 3, Figure 6 As shown, the control unit also includes a controller and an alarm. A photoelectric reflective liquid level sensor 43 is installed on the inner wall of the positioning cylinder 17. The photoelectric reflective liquid level sensor 43, the drive member 38, the one-way valve, and the alarm are all electrically connected to the controller. In this embodiment, the model of the photoelectric reflective liquid level sensor 43 is XKC-IR03, and the controller uses a single-chip microcomputer model STM32.

[0059] During the infusion process, if the patient falls asleep, the photoelectric reflective liquid level sensor 43 will play an important role and detect the liquid level information in the infusion bottle 18 in real time. Once the liquid level in the infusion bottle 18 drops below the preset value, the controller will respond quickly. On the one hand, it will control the alarm to sound an alarm to remind the patient and the nurse to pay attention to the infusion situation; on the other hand, the controller will control the driving member 38 to start the action. The driving member 38 will drive the puncture needle 39 to move in the direction close to the air bag 40 until the puncture needle 39 pierces the air bag 40 and penetrates into it.

[0060] At this time, the controller will control the one-way valve to open. Under this operation, the airflow previously generated by the compression of the piston in the piston cylinder 36 will smoothly inflate the airbag 33 through the channel formed by the outlet pipe 41 and the puncture needle 39. As the gas is continuously filled, the airbag 33 gradually expands. The airbag will simultaneously block the two anti-backflow parts. This double blocking method can effectively prevent air from entering the infusion hose 2 below the anti-backflow tube 28, thereby avoiding the medical risks that may be caused by the entry of air, and providing a more reliable guarantee for the patient's infusion safety.

[0061] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An infusion device, characterized in that: It comprises an infusion stand, which comprises a base and a balancing unit. The balancing unit comprises a concentrically arranged No. 1 balancing ring and a No. 2 balancing ring. The No. 1 balancing ring and the No. 2 balancing ring are hinged on opposite sides, and the line connecting the two hinge points passes through the center of the No. 1 balancing ring. A counterweight block concentric with the No. 1 balancing ring is arranged below the No. 1 balancing ring. Two connecting strips located inside the No. 2 balancing ring are fixedly connected to the top of the counterweight block. The No. 2 balancing ring is hinged on the two connecting strips on opposite sides, and the line connecting the two hinge points also passes through the center of the No. 1 balancing ring. The line connecting the hinge points of the No. 1 balancing ring and the No. 2 balancing ring and the line connecting the hinge points of the No. 2 balancing ring and the connecting strip are perpendicular to each other. An L-shaped connecting rod is fixedly connected to the No. 1 balancing ring, and the L-shaped connecting rod is detachably connected to the base. An anti-slip positioning mechanism for fixing the infusion bottle and the bottle insertion needle is fixedly connected to the top of the connecting strip.

2. An infusion device according to claim 1, characterized in that: The anti-slip positioning mechanism includes a positioning unit and an anti-slip unit. The positioning unit includes a positioning cylinder. Two relatively arranged clamping parts are provided on the positioning cylinder. The clamping parts are used to fix the infusion bottle. A through hole is provided at the bottom of the positioning cylinder for the infusion bottle plug to pass through. The anti-slip unit includes a fixing seat. The fixing seat is fixedly connected to the bottom of the positioning cylinder. Two relatively arranged anti-slip parts are provided on the fixing seat. The anti-slip parts are used to fix the bottle insertion needle.

3. An infusion device according to claim 2, characterized in that: Each anti-slip part includes a threaded rod, which is threadedly connected to the side wall of the fixed seat. The threaded rod is rotatably connected to a limiting block, and the limiting block is fixedly connected to a guide rod. The free end of the guide rod is slidably set on the fixed seat, and a limiting groove is provided on the upper side of the limiting block.

4. An infusion device according to claim 3, characterized in that: It also includes an infusion set, which includes an infusion hose and an intravenous needle. The infusion hose is provided with a bottle insertion needle, an air inlet pipe, a drip bucket and a flow rate regulator in sequence. The intravenous needle is detachably connected to one end of the infusion hose close to the flow rate regulator. A filter is provided on the infusion hose between the drip bucket and the flow rate regulator. An anti-backflow unit is provided on the infusion hose between the filter and the flow rate regulator.

5. The infusion device according to claim 4, characterized in that: The anti-backflow unit includes an anti-backflow tube, and the interior of the anti-backflow tube is provided with a main liquid inlet channel, a main liquid outlet channel and a plurality of anti-backflow parts, each anti-backflow part includes a No. 1 diversion channel, a No. 2 diversion channel and an air bag, and the air bag is fixedly connected in the anti-backflow tube between the No. 1 diversion channel and the No. 2 diversion channel. One end of the main liquid inlet channel close to the filter is connected to the infusion hose, and the other end is connected to the No. 1 diversion channel and the No. 2 diversion channel. Adjacent anti-backflow parts are connected in sequence, and the anti-backflow part at the end is connected to the main liquid outlet channel, and the end of the main liquid outlet channel close to the flow rate regulator is connected to the infusion hose.

6. An infusion device according to claim 5, characterized in that: A puncture air supply unit is provided at the bottom of each limit block, and sealed air bags are symmetrically fixedly connected on both sides of the bottle insertion needle. Each air bag is connected with a connecting tube, and the free end of the connecting tube is connected with one of the air bags. An exhaust pipe is provided on the air bag, and an exhaust valve is installed on the exhaust pipe. The side wall of the positioning cylinder is a hollow structure. The puncture air supply unit can puncture the air bag and supply air into the air bag through the connecting tube.

7. An infusion device according to claim 6, characterized in that: Each puncture air supply unit includes a piston cylinder and a driving member, a handle is fixedly connected to the limit block, a piston rod is fixedly connected to the handle, a piston is fixedly connected to the free end of the piston rod, a rubber sealing ring is arranged on the outer circumference of the piston, the piston seal is slidingly arranged in the piston cylinder, a fixed bracket is fixedly connected to the fixed seat, the piston cylinder is mounted on the fixed bracket, an air outlet pipe is connected to the piston cylinder, a one-way valve is installed on the air outlet pipe, the driving member is mounted on the fixed seat below the fixed bracket, a puncture needle is installed on the output shaft of the driving member, the puncture needle adopts a hollow structure design, a sharp puncture hole is arranged at the free end, and the lower end of the air outlet pipe is connected to the inside of the puncture needle.

8. An infusion device according to claim 7, characterized in that: A hook is fixedly connected to the No. 1 balance ring.

9. An infusion device according to claim 8, characterized in that: It also includes a control unit, which includes a controller. A photoelectric reflective liquid level sensor is installed on the inner wall of the positioning cylinder. The photoelectric reflective liquid level sensor, the driving component, and the one-way valve are all electrically connected to the controller.

10. An infusion device according to claim 9, characterized in that: The control unit also includes an alarm, which is electrically connected to the controller.

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