An intravenous infusion set

Abstract

The application discloses a kind of intravenous infusion apparatus, it is related to infusion apparatus technical field.The present application includes Murphy drip tube, one end is equipped with second hose, the other end is equipped with first hose, and first hose is used to connect with infusion bottle.The present application is connected with infusion bottle by first hose, installation shell is installed below Murphy drip tube, when liquid medicine moves to installation shell when using, first pass liquid inlet chamber, liquid medicine in liquid inlet chamber passes through buoyancy and makes air bag drive baffle to rotate to remove the shielding of through hole, so that liquid medicine can enter into liquid outlet chamber, at this time, also through buoyancy and make empty bag ball float, when the liquid medicine in infusion bottle is finished, the buoyancy of liquid in liquid inlet chamber is less than the gravity of empty bag ball, so that empty bag ball will be the nozzle of third hose is shielded, reduce the possibility of air movement to third hose and further affect the safety of patient, increase the safety of device when using.

Description

Technical Field

[0001] This invention relates to the field of infusion set technology, and more specifically to an intravenous infusion set. Background Technology

[0002] Intravenous infusion sets are common medical devices, mainly used for intravenous infusion in hospitals. Made of medical-grade PVC, these sets are durable, stable, and stronger. The bevel is smooth and flat, the needle is made of high-quality stainless steel, the flow rate is controllable, and the pulley-type switch makes them easy to control.

[0003] In actual use, when the IV drip is finished, air continues to be delivered into the patient's body along the IV tubing. It is necessary to clamp the IV tubing in time. If medical staff or patients do not notice this in time and fail to change the IV bottle or remove the needle, there is a safety hazard. However, the IV drip set does not have a structure to block air, so when the above situation occurs, the IV drip set cannot effectively protect the patient.

[0004] Therefore, this invention proposes an intravenous infusion set to improve this problem. Summary of the Invention

[0005] The purpose of this invention is to provide an intravenous infusion set in order to solve the problems mentioned above in the background art.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] An intravenous infusion set includes a Murphy drip tube with a second tubing attached to one end and a first tubing attached to the other end, the first tubing being used to connect to an infusion bottle, and further includes:

[0008] A mounting shell is installed on the second flexible tube. A partition plate is installed inside the mounting shell, which divides the interior of the mounting shell into an inlet chamber and an outlet chamber. The inlet chamber is connected to the second flexible tube. A through hole is provided on the partition plate to connect the inlet chamber and the outlet chamber. A filter plate is installed in the through hole. A third flexible tube connected to the patient is installed on the outlet chamber. An empty balloon is installed in the outlet chamber. When the empty balloon falls, it covers the opening of the third flexible tube in the outlet chamber.

[0009] A baffle plate is rotatably mounted on a partition plate and is located inside the liquid inlet chamber. An airbag is installed on the baffle plate, which is used to block the through hole.

[0010] Furthermore, a rotating rod is rotatably mounted on one side of the partition plate located inside the liquid inlet chamber, and a push plate is mounted on one side of the rotating rod. The push plate is used to push the baffle plate. A rubber sheet is mounted on the side wall of the mounting shell located on one side of the liquid inlet chamber, and a contact plate that contacts the rubber sheet is mounted on the other side of the rotating rod.

[0011] Furthermore, an arc-shaped spring plate is installed inside the liquid inlet chamber, one side of which contacts one side of the contact plate. A limiting block is installed on the partition plate, and the limiting block is located on the side of the push plate away from the shield plate. When the contact plate is pushed by the arc-shaped spring plate, the limiting block is located on the movement path of the push plate.

[0012] Furthermore, a receiving cylinder is installed on the outer wall of the mounting shell on one side of the liquid inlet cavity. An abutment rod is slidably installed on the receiving cylinder. One side of the abutment rod passes through the receiving cylinder and is located outside the receiving cylinder. The other end of the abutment rod contacts the rubber sheet. When the push plate contacts the limiting block, the abutment rod is located on the side of the contact plate away from the arc-shaped spring plate.

[0013] Furthermore, an outlet pipe is installed on the side of the partition plate facing the outlet chamber. The opening at one end of the outlet pipe faces the third flexible tube, and the opening at the other end of the outlet pipe is connected to the through hole. A valve is installed at the opening of the outlet pipe facing the third flexible tube, and an outlet slit is provided on the valve.

[0014] Furthermore, multiple limiting plates are installed inside the liquid outlet chamber. The limiting plates are arranged in a ring around the opening of the third hose along the axis of the third hose. The empty balloon is located between the limiting plates and the limiting plates do not contact the empty balloon.

[0015] Furthermore, an inclined rod is installed on one side of the baffle plate. When the baffle plate blocks the through hole, the inclined rod is located on the side of the baffle plate closer to the limiting block.

[0016] Furthermore, an insertion tip is installed on the first flexible tube, and an inner cavity communicating with the lumen of the first flexible tube is opened on the insertion tip. An opening communicating with the inner cavity is opened on the side wall of the insertion tip. An elastic retaining plate is installed in the opening, and one side of the elastic retaining plate is connected to one side of the inner wall of the opening. A protrusion is formed on the elastic retaining plate, such that the diameter of the insertion tip where the elastic retaining plate is installed is larger than the diameter of the insertion tip.

[0017] Furthermore, the protrusions on the elastic plate cause the elastic plate to form a connecting section and a movable section. The connecting section is connected to the inner wall of the opening, and the angle between the connecting section and the side wall of the inserted pointed tip is smaller than the angle between the movable section and the side wall of the inserted pointed tip.

[0018] Furthermore, the diameter of the receiving cylinder is larger than the diameter of the rubber sheet, so that the receiving cylinder can shield the rubber sheet.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention connects to the infusion bottle via a first flexible tube. The mounting housing is installed below the Murphy drip tube. During use, when the medication flows from the Murphy drip tube into the mounting housing, it first passes through the inlet chamber. The buoyancy of the medication in the inlet chamber causes the airbag to rotate, releasing the obstruction of the through hole. At this point, the medication can enter the outlet chamber. Buoyancy causes the empty balloon to float. When the medication in the infusion bottle is finished, the buoyancy of the liquid in the inlet chamber is less than the weight of the empty balloon. The empty balloon then blocks the opening of the third flexible tube, reducing the possibility of air moving into the third flexible tube and affecting patient safety, thus increasing the safety of the device during use. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the liquid inlet chamber of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the liquid outlet chamber of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure on the partition plate inside the liquid outlet chamber of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure on the partition plate inside the liquid inlet chamber of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the pointed tip of the present invention;

[0027] Figure 7 This is an exploded view of part of the structure of this invention;

[0028] Figure 8 This is an exploded view of the structure on the outlet pipe of the present invention;

[0029] Figure 9 This is a three-dimensional sectional view of the mounting shell structure of the present invention;

[0030] Figure 10 This is another perspective sectional view of the mounting shell structure of the present invention;

[0031] Figure 11 This is a three-dimensional sectional view of the mounting shell and its internal structure of the present invention;

[0032] Reference numerals: 1. Murphy dropper; 101. Second tubing; 102. First tubing; 2. Mounting housing; 201. Divider plate; 202. Discharge chamber; 203. Through hole; 204. Empty bulb; 205. Inlet chamber; 206. Filter plate; 3. Third tubing; 4. Baffle plate; 401. Airbag; 5. Rotating rod; 6. Push plate; 7. Rubber sheet; 8. Contact plate; 9. Arc-shaped spring plate; 10. Limiting block; 11. Receiving cylinder; 12. Abutment rod; 13. Discharge tube; 14. Valve; 15. Outlet slit; 16. Limiting plate; 17. Inclined rod; 18. Inserted tip; 19. Through port; 20. Elastic retaining plate; 2001. Connecting section; 2002. Movable section. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1 - Figure 11 As shown, the present invention provides an intravenous infusion set in an embodiment, comprising a Murphy drip tube 1, one end of which is fitted with a second tubing 101, and the other end with a first tubing 102. The first tubing 102 is used to connect to an infusion bottle. The first tubing 102 is inserted into the infusion bottle through a puncture needle or other sharp tubular structure, enabling the device to connect to the infusion bottle. When the device is in use, the first tubing 102 is positioned above the Murphy drip tube 1, and the second tubing 101 is positioned below it. The Murphy drip tube 1 is existing technology and is connected to the outside. Before infusion, after connecting the device to the infusion bottle, it is necessary to vent the device to maintain 1 / 2 to 2 / 3 of the liquid volume in the Murphy drip tube 1, forming a liquid level barrier to prevent air from entering the blood vessel. The device also includes:

[0035] Mounting housing 2 is installed on the second tubing 101. Since the second tubing 101 is located below the Murphy drip chamber 1, mounting housing 2 is also located below the Murphy drip chamber 1. The medication in the infusion bottle first passes through the Murphy drip chamber 1 and then enters mounting housing 2. A partition plate 201 is installed inside mounting housing 2, dividing the interior of mounting housing 2 into an inlet chamber 205 and an outlet chamber 202. The partition plate 201 is located in the middle of the cavity of mounting housing 2, dividing mounting housing 2 vertically into two equal parts. The system forms an outlet chamber 202 and an inlet chamber 205, with the inlet chamber 205 connected to a second flexible tube 101. A through hole 203 is provided on the partition plate 201 to connect the inlet chamber 205 and the outlet chamber 202. A filter plate 206 is installed within the through hole 203. The filter plate 206, like a semi-permeable membrane in the prior art, allows it to filter impurities in the medication solution. A third flexible tube 3, connected to the patient, is installed on the outlet chamber 202. The free end of the third flexible tube 3 is similar to that in the prior art. The inlet chamber 205 is connected to the indwelling needle via a threaded connection. The top of the inlet chamber 205 is connected to the second hose 101, and the bottom of the outlet chamber 202 is connected to the third hose 3. The partition plate 201 is circular. Using the diameter of the partition plate 201 in the vertical direction as a reference line, the through hole 203 is located at two-thirds of the way up from the bottom of this reference line, making the through hole 203 relatively high. An empty balloon 204 is installed inside the outlet chamber 202. When the empty balloon 204 falls, it will... The opening of the third flexible tube 3 within the outlet chamber 202 is blocked. The cross-sections of the inlet chamber 205 and the outlet chamber 202 are circular. The opening of the third flexible tube 3 is located at the lowest point of the outlet chamber 202. This ensures that when there is no medication in the outlet chamber 202, the empty capsule 204, under the influence of gravity and guided by the arc-shaped surface of the inner wall of the outlet chamber 202, is positioned at the opening of the third flexible tube 3. Furthermore, the inner wall of the opening of the third flexible tube 3 has a chamfer, allowing the opening of the third flexible tube 3 to partially accommodate the empty capsule 204. Figure 11 As shown, the shielding effect of the empty balloon 204 on the third hose 3 is increased;

[0036] When the medication enters the housing 2, it first resides in the inlet chamber 205. When the liquid level surpasses the through hole 203, the medication enters the outlet chamber 202. As the amount of medication in the outlet chamber 202 increases, the buoyancy exerted by the medication on the empty bulb 204 also gradually increases, preventing the empty bulb 204 from obstructing the opening of the third flexible tube 3. After the medication in the infusion bottle is finished, the medication in the inlet chamber 205 will gradually flow into the outlet chamber 202 until the liquid level is below the through hole 203. The medication in the outlet chamber 202 gradually enters the third flexible tube 3. The loss of medication replenishment from the infusion bottle causes the amount of medication in the outlet chamber 202 to gradually decrease. At this point, the buoyancy exerted by the medication in the outlet chamber 202 on the empty bulb 204 is less than the weight of the empty bulb 204, causing the empty bulb 204 to fall. Since the third flexible tube 3 is located in the outlet chamber 202... At the lowest point of 02, when the empty balloon 204 falls, it is guided by the arc-shaped surface of the inner wall of the liquid outlet chamber 202, allowing the empty balloon 204 to move to the opening of the third tubing 3, thereby blocking the opening of the third tubing 3 and blocking the air. Since the infusion set needs to achieve internal and external air pressure balance through the Murphy drip tube 1, when the empty balloon 204 blocks the opening of the third tubing 3, and the other end of the third tubing 3 is connected to the patient, when the opening of the third tubing 3 is blocked by the empty balloon 204, the internal and external air pressure of the third tubing 3 becomes unbalanced. After the liquid continues to flow out for a period of time, a negative pressure forms inside the third tubing 3, which cannot replenish the air, causing the liquid flow rate to drop sharply or even stop completely. This allows a section of liquid to be retained inside the third tubing 3 to form a liquid seal, reducing the possibility of air continuing to enter the patient's body and increasing the safety of the device.

[0037] Baffle 4 is rotatably mounted on partition plate 201 and located inside liquid inlet chamber 205. An airbag 401 is mounted on baffle 4. Baffle 4 is used to block the through hole 203. Baffle 4 is circular in shape. Figure 1 From the main viewpoint, a rotating rod is installed on the vertically upward part of the shield 4, such as... Figure 11As shown, the baffle plate 4 is rotatably mounted on the partition plate 201 via a rotating rod. At this time, the rotating rod can be positioned above the through hole 203. Therefore, when no medicine is injected into the liquid inlet chamber 205, the baffle plate 4 can naturally droop under the influence of gravity and block the through hole 203. When medicine is injected into the liquid inlet chamber 205, the buoyancy of the medicine can lift the airbag 401, causing the baffle plate 4 to rotate, thereby releasing the baffle plate 4 from blocking the through hole 203. When the medicine is finished being injected, the buoyancy of the medicine in the liquid inlet chamber 205 is insufficient to support the airbag 401 to float. Since the center of gravity of the baffle plate 4 is close to the side where the airbag 401 is installed, the baffle plate 4 can rotate downwards to reset and block the through hole 203. This further reduces the possibility of air in the Murphy dropper 1 entering the liquid outlet chamber 202 through the liquid inlet chamber 205, further increasing the safety of the device.

[0038] Compared with the prior art, the device is connected to the infusion bottle via the first tubing 102. The mounting shell 2 is installed below the Murphy drip tube 1. During use, when the medication moves from the Murphy drip tube 1 into the mounting shell 2, it first passes through the inlet chamber 205. The buoyancy of the medication in the inlet chamber 205 causes the airbag 401 to rotate and remove the obstruction of the through hole 203, allowing the medication to enter the outlet chamber 202. At this time, the buoyancy also causes the empty balloon 204 to float. When the medication in the infusion bottle is finished, the buoyancy of the liquid in the inlet chamber 205 is less than the weight of the empty balloon 204, causing the empty balloon 204 to block the opening of the third tubing 3. This reduces the possibility of air moving into the third tubing 3 and affecting the patient's safety, thus increasing the safety of the device during use.

[0039] like Figure 2 , Figure 5 , Figure 9 and Figure 11As shown, a portion of the structure of the partition plate 201 is disclosed. A rotating rod 5 is rotatably mounted on one side of the partition plate 201 within the liquid inlet chamber 205. A rotating block is mounted on the rotating rod 5. A cavity is formed on the partition plate 201 that is rotatably connected to the rotating block, so that the rotating rod 5 is rotatably connected to the partition plate 201. A pushing plate 6 is mounted on the side wall of the rotating rod 5. The pushing plate 6 is used to push the baffle plate 4. The pushing plate 6 is in contact with the surface of the partition plate 201. When the rotating rod 5 is rotated, it causes the pushing plate 6 to move closer to or away from the baffle plate 4. When the pushing plate 6 moves closer to the baffle plate 4 and abuts against the baffle plate 4, the force generated by the pushing plate 6 on the baffle plate 4 extends along... A horizontal force component provides the initial force for the rotation of the shield 4, enabling the shield 4 to rotate smoothly. A rubber sheet 7 is installed on the side wall of the mounting shell 2 on one side of the liquid inlet chamber 205. A contact plate 8 that contacts the rubber sheet 7 is installed at the end of the rotating rod 5. A channel is opened in the middle of the mounting shell 2. The rubber sheet 7 is made of medical rubber and is fixedly installed in the channel by heat sealing. Because the rubber sheet 7 is relatively soft, medical staff can press the rubber sheet 7 to contact the contact plate 8 and push the contact plate 8, thereby driving the rotating rod 5 and the push plate 6 to rotate, so that the push plate 6 pushes the shield 4.

[0040] When the device is in use, as the medication enters the inlet chamber 205, the buoyancy exerted by the medication on the airbag 401 gradually increases with the amount of medication. However, since the rotation point of the baffle 4 is located directly above the through hole 203, and the buoyancy is an upward force, while the movement trajectory of the baffle 4 is rotational, it is prone to jamming. At this time, medical personnel push the contact plate 8 against the rubber sheet 7, causing the rotating rod 5 to rotate and drive the push plate 6 to push the baffle 4, applying a horizontal component force to the baffle 4, allowing the baffle 4 to rotate smoothly, increasing the feasibility of the device. The baffle 4 is then rotated... The advantages of a rotating design rather than a linear sliding design are as follows: If the baffle 4 is a sliding design, when the baffle 4 slides upward, the buoyancy of the liquid on the baffle 4 needs to completely counteract the weight of the baffle 4. However, if the baffle 4 is a rotating design, there is a rotating rod between the baffle 4 and the partition plate 201. When the baffle 4 rotates to release the obstruction of the through hole 203, the rotating rod is located at the lowest point of the baffle 4 and plays a supporting role. The rotating rod can also share part of the weight of the baffle 4. At this time, the weight of the baffle 4 is shared by the buoyancy and the supporting force of the rotating rod, so that the buoyancy generated by the liquid does not need to be too large, increasing the feasibility of the device.

[0041] like Figure 2 and Figure 5As shown, a portion of the structure within the liquid inlet chamber 205 is disclosed. An arc-shaped spring plate 9 is installed in the liquid inlet chamber 205 within the mounting shell 2. One end of the arc-shaped spring plate 9 is connected to the inner wall of the liquid inlet chamber 205, and the other end of the arc-shaped spring plate 9 contacts one side of the contact plate 8. A limiting block 10 is installed on the partition plate 201. The limiting block 10 is located on the side of the push plate 6 away from the shield plate 4. When the contact plate 8 is pushed by the arc-shaped spring plate 9, the limiting block 10 is located on the movement path of the push plate 6. The projections of the contact plate 8 and the push plate 6 on the partition plate 201 coincide. For ease of subsequent description, the side of the two along the projection closer to the shield plate 4 is designated as the reset side, and the side along the projection away from the shield plate 4 is designated as the limiting side. The arc-shaped spring plate 9 is located on the reset side of the contact plate 8, and the limiting block 10 is located on the limiting side of the push plate 6. The arc-shaped spring plate 9 is made of medical plastic and is elastic.

[0042] When the device needs to contact the shielding plate 4 via the push plate 6, the push plate 6 needs to move from the limiting side to the resetting side. The medical personnel move the contact plate 8 on the limiting side of the contact plate 8, causing the contact plate 8 to drive the rotating rod 5 to rotate, which in turn drives the push plate 6 to push the shielding plate 4. At the same time, the contact plate 8 also contacts and presses against the arc-shaped spring plate 9. Throughout the process of the push plate 6 contacting the shielding plate 4, the push plate 6 always contacts the shielding plate 4 through its resetting side and does not rotate out of bounds to contact the shielding plate 4 with its own limiting side, so that when the push plate 6 is reset later, it will not affect the shielding plate 4.

[0043] When the shielding plate 4 releases its obstruction of the through hole 203, the finger that was in contact with the contact plate 8 is released. At this time, the arc-shaped spring plate 9 resets through elastic deformation, causing it to push the contact plate 8 from the reset side to the limiting side. This also drives the rotating rod 5 to move in the same direction as the push plate 6 until the push plate 6 contacts the limiting block 10. The limiting block 10 then blocks the push plate 6, restricting its movement for easier subsequent use. Although the infusion set is a disposable product, patients need to infuse more than one bottle of fluid during hospitalization. After one bottle is infused, the device needs to be connected to the next infusion bottle. Therefore, the arc-shaped spring plate 9 and the limiting block 10 facilitate the reset of the push plate 6 for subsequent readjustment and use, increasing the practicality of the device.

[0044] like Figure 2 and Figure 9As shown, a portion of the structure on the mounting shell 2 is disclosed. A receiving cylinder 11 is mounted on the outer wall of the mounting shell 2 on one side of the liquid inlet chamber 205. An abutment rod 12 is slidably mounted on the receiving cylinder 11. One side of the abutment rod 12 penetrates the receiving cylinder 11 and is located outside the receiving cylinder 11. The other end of the abutment rod 12 contacts the rubber sheet 7. When the pushing plate 6 contacts the limiting block 10, the abutment rod 12 is located on the side of the contact plate 8 away from the arc-shaped spring plate 9, that is, the projection of the plane where the abutment rod 12 and the contact plate 8 are located is located on the limiting side of the contact plate 8. The receiving cylinder 11 has a channel for receiving the contact rod 12, and the inner wall of the channel is in contact with the side wall of the contact rod 12. When the contact rod 12 slides, it can only slide in a straight line due to the restriction of the side wall of the channel, which increases the stability of the contact rod 12 when sliding. The end of the contact rod 12 that contacts the rubber sheet 7 has a rounded corner, which reduces the possibility of the rubber sheet 7 being damaged due to the relatively sharp edge of the end face of the contact rod 12 when it contacts the rubber sheet 7, and increases the practicality of the device.

[0045] When the device is not in use, the limiting side of the push plate 6 is in contact with the limiting block 10. At this time, the end of the abutment rod 12 is located on the limiting side of the contact plate 8. When it is necessary to rotate the push plate 6, the abutment rod 12 is pressed towards the rubber sheet 7, so that the abutment rod 12 abuts against the rubber sheet 7 and applies force to the limiting side of the contact plate 8, so that the contact plate 8 can move towards the arc-shaped spring plate 9, thereby driving the push plate 6 to abut against the shielding plate 4. After pressing, since the rubber sheet 7 is made of medical rubber and has elasticity, the abutment rod 12 can be reset by the reset of the rubber sheet 7. In use, the push plate 6 is driven by simply pressing the abutment rod 12, which greatly increases the convenience of device operation.

[0046] like Figure 8 and Figure 10 As shown, the structure installed on the partition plate 201 is disclosed. An outlet pipe 13 is installed on the side of the partition plate 201 facing the outlet chamber 202. One end of the outlet pipe 13 opens towards the third flexible tube 3, and the other end of the outlet pipe 13 connects to the through hole 203. A valve 14 is installed at the opening of the outlet pipe 13 facing the third flexible tube 3. An outlet slit 15 is provided on the valve 14. The outlet pipe 13 is L-shaped. Figure 1From the main perspective, one end of the outlet tube 13 is horizontal, and the other end is vertical. The horizontal end connects to the through hole 203, while the vertical end has its opening facing the bottom of the inner wall of the outlet chamber 202. A valve 14, made of medical rubber or polymer material, is installed at the opening to block the tube opening. The outlet slit 15 is a slit cut into the valve 14, and the slit has two inner walls. Under normal conditions, the inner walls contact each other and close through friction. When the liquid enters the outlet chamber... When the liquid falls into the tube, the gravity and downward potential energy of the liquid itself impact the valve 14, which causes the outlet slit 15 to open, allowing the liquid to flow smoothly into the outlet chamber 202. After the liquid is fed in, even if some air enters the through hole 203 during the downward rotation of the baffle plate 4, the airflow alone is not enough to blow the outlet slit 15 open, further reducing the possibility of airflow entering the outlet chamber 202, and thus reducing the possibility of the liquid entering the third hose 3, increasing the safety of the device during use.

[0047] The mounting shell 2 is made of relatively hard plastic and its body can be squeezed. During the initial venting, the third tubing 3 can be clamped first and then the mounting shell 2 can be squeezed directly to create a negative pressure in the liquid outlet chamber 202, which can quickly draw in the drug solution and make the empty balloon 204 float up quickly. This operation is consistent with the clinical operation of quickly injecting liquid into the Murphy dropper 1.

[0048] like Figure 10 As shown, the structure inside the liquid outlet chamber 202 is disclosed. Multiple limiting plates 16 are installed inside the liquid outlet chamber 202. The limiting plates 16 are arranged in a ring around the opening of the third hose 3 along the axis of the third hose 3. The empty balloon 204 is located between the limiting plates 16 and the limiting plates 16 do not contact the empty balloon 204. Multiple limiting plates 16 surround the opening of the third hose 3, and a cavity for accommodating the empty balloon 204 is formed between the limiting plates 16. When the empty balloon 204 floats, its movement path is blocked by the limiting plates 16, so that the empty balloon 204 can be above the third hose 3 when floating. This allows the empty balloon 204 to move to the opening of the third hose 3 more quickly when falling and seal it. This reduces the possibility that the empty balloon 204 will not block the opening of the third hose 3 in time after the medicine in the liquid outlet chamber 202 is exhausted due to the swaying of the empty balloon 204 in the liquid outlet chamber 202. This increases the practicality of the device.

[0049] Furthermore, when the empty balloon 204 is located at the opening of the third hose 3, the limiting plate 16 does not contact the empty balloon 204, so that when the empty balloon 204 floats up, the limiting plate 16 will not generate resistance to the rise of the empty balloon 204 through friction, thus increasing the practicality of the device.

[0050] like Figure 5 and Figure 9 As shown, the specific structure of the shielding plate 4 is disclosed. A tilting rod 17 is installed on one side of the shielding plate 4. When the shielding plate 4 blocks the through hole 203, the tilting rod 17 is located on the side of the shielding plate 4 closest to the limiting block 10. The tilting rod 17 is made of medical-grade plastic and is used to deflect the center of gravity of the shielding plate 4. When the shielding plate 4 is in a state where it is not blocking the through hole 203, the tilting rod 17 is located on the side of the shielding plate 4 away from the push plate 6. This ensures that when the buoyancy force exerted by the medication on the airbag 401 is less than the weight of the shielding plate 4 and its components, the weight of the shielding plate 4 is located at the tilting rod 17. Figure 5 The shielding plate 4 rotates counterclockwise, which allows it to successfully block the through hole 203, reducing the impact of the push plate 6 when the shielding plate 4 rotates back to its original position, and increasing the feasibility of the device.

[0051] When the baffle plate 4 is in the position that blocks the through hole 203, the position between the tilting rod 17 and the push plate 6 is as follows: Figure 9 As shown, the tilting rod 17 will not affect the blocking effect of the baffle plate 4 on the through hole 203.

[0052] like Figure 6 As shown, the structure of the first flexible tube 102 is disclosed. An insertion tip 18 is installed on the first flexible tube 102. The insertion tip 18 has an inner cavity communicating with the lumen of the first flexible tube 102. An opening 19 communicating with the inner cavity is formed on the side wall of the insertion tip 18. An elastic retaining plate 20 is installed inside the opening 19. One side of the elastic retaining plate 20 is connected to one side of the inner wall of the opening 19. A protrusion is formed on the elastic retaining plate 20, such that the diameter of the insertion tip 18 where the elastic retaining plate 20 is installed is larger than the diameter of the insertion tip 18. The shape of the elastic retaining plate 20 is as follows: Figure 6 As shown, the first tubing 102 is connected to the infusion bottle via an insertion tip 18. The insertion tip 18 penetrates the rubber stopper of the infusion bottle, creating a connection between the first tubing 102 and the inside of the bottle. During this penetration, a through-hole gradually forms on the rubber stopper. The inner wall of this through-hole abuts against the elastic retaining plate 20, keeping it within the opening 19. When the insertion tip 18 is fully inserted into the infusion bottle, the elastic retaining plate 20 also enters the bottle. With no object obstructing the elastic retaining plate 20, it allows for... The elastic retaining plate 20 moves from inside the opening 19 to outside the opening 19, making the diameter of the insertion tip 18 larger than the diameter of the hole in the rubber stopper of the infusion bottle. Since the invention has an additional component installed below the Murphy dropper 1, the overall weight of the device increases. The increase in the diameter of the insertion tip 18 by the elastic retaining plate 20 makes the insertion tip 18 more stably inserted into the infusion bottle, reducing the possibility of the insertion tip 18 separating from the infusion bottle and increasing the connection strength between the device and the infusion bottle.

[0053] like Figure 1 and Figure 6 As shown, the specific structure of the insertion tip 18 is disclosed. The protrusion on the elastic plate 20 causes the elastic plate 20 to form a connecting section 2001 and a movable section 2002. The connecting section 2001 is connected to the inner wall of the port 19. The included angle between the connecting section 2001 and the side wall of the insertion tip 18 is smaller than the included angle between the movable section 2002 and the side wall of the insertion tip 18. Because the included angle of the connecting section 2001 is smaller, when the insertion tip 18 is inserted into the infusion bottle, the inner wall of the channel formed on the rubber stopper of the infusion bottle can better push the elastic plate 20 into the port 19. When the infusion bottle needs to be replaced, the insertion tip 18 is pulled out. Since the movable section 2002 is inclined, when the insertion tip 18 is pulled outward, the guide of the movable section 2002 allows the insertion tip 18 to be pulled out smoothly, increasing the feasibility of the device.

[0054] like Figure 7 and Figure 11 As shown, the specific structure of the receiving cylinder 11 is disclosed. The diameter of the receiving cylinder 11 is larger than the diameter of the rubber sheet 7 so that the receiving cylinder 11 can shield the rubber sheet 7. In use, the receiving cylinder 11 shields and protects the rubber sheet 7, reducing the possibility of the rubber sheet 7 being damaged due to contact with external objects, and increasing the practicality of the device.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intravenous infusion set, comprising a Murphy drip tube (1), one end of which is fitted with a second tubing (101) and the other end with a first tubing (102), characterized in that, Also includes: The mounting shell (2) is installed on the second hose (101). The mounting shell (2) is divided into an inlet chamber (205) and an outlet chamber (202) by a partition plate (201). The partition plate (201) is located in the middle of the cavity of the mounting shell (2) and divides the mounting shell (2) into two parts in the vertical direction. A through hole (203) is provided on the partition plate (201). A filter plate (206) is installed in the through hole (203). A third hose (3) is installed on the mounting shell (2). An empty balloon (204) is provided in the outlet chamber (202). When the empty balloon (204) falls, the empty balloon (204) blocks the connection between the third hose (3) and the mounting shell (2). A baffle plate (4) is rotatably mounted on a partition plate (201) and located in the liquid inlet chamber (205). An airbag (401) is installed on the baffle plate (4). The baffle plate (4) is used to block the through hole (203). A rotating rod (5) is rotatably mounted on one side of the partition plate (201), and a push plate (6) is mounted on the rotating rod (5). The push plate (6) is used to push the shield plate (4). A rubber sheet (7) is mounted on the side wall of the mounting shell (2), and a contact plate (8) that contacts the rubber sheet (7) is mounted at the end of the rotating rod (5). An arc-shaped spring plate (9) is installed inside the mounting shell (2). One side of the arc-shaped spring plate (9) is in contact with one side of the contact plate (8). A limiting block (10) is installed on the partition plate (201). The limiting block (10) is located on the side of the push plate (6) away from the shield plate (4). When the contact plate (8) is pushed by the arc-shaped spring plate (9), the limiting block (10) is located on the movement path of the push plate (6). The outer wall of the mounting shell (2) is fitted with a receiving cylinder (11), and a contact rod (12) is slidably mounted on the receiving cylinder (11). One side of the contact rod (12) passes through the receiving cylinder (11) and is located outside the receiving cylinder (11). The other end of the contact rod (12) contacts the rubber sheet (7). When the push plate (6) contacts the limiting block (10), the contact rod (12) is located on the side of the contact plate (8) away from the arc-shaped spring plate (9).

2. The intravenous infusion set according to claim 1, characterized in that, A tube (13) is installed on one side of the partition plate (201). One end of the tube (13) opens toward the third flexible tube (3), and the other end of the tube (13) is connected to the through hole (203). A valve (14) is installed at the opening of the tube (13) toward the third flexible tube (3), and an outlet slit (15) is provided on the valve (14).

3. The intravenous infusion set according to claim 2, characterized in that, Multiple limiting plates (16) are installed in the liquid outlet chamber (202). The limiting plates (16) are arranged in a ring around the opening of the third hose (3) along the axis of the third hose (3). The empty sphere (204) is located between the limiting plates (16) and does not contact the limiting plates (16).

4. The intravenous infusion set according to claim 3, characterized in that, An inclined rod (17) is installed on one side of the shielding plate (4). When the shielding plate (4) blocks the through hole (203), the inclined rod (17) is located on the side of the shielding plate (4) close to the limiting block (10).

5. The intravenous infusion set according to claim 4, characterized in that, An insertion tip (18) is installed on the first flexible tube (102). The insertion tip (18) has an inner cavity that communicates with the first flexible tube (102). The side wall of the insertion tip (18) has a through-hole (19) that communicates with the inner cavity. An elastic retaining plate (20) is installed in the through-hole (19). A protrusion is formed on the elastic retaining plate (20) so that the diameter of the insertion tip (18) where the elastic retaining plate (20) is installed is larger than the diameter of the insertion tip (18).

6. The intravenous infusion set according to claim 5, characterized in that, The protrusion on the elastic plate (20) causes the elastic plate (20) to form a connecting section (2001) and a movable section (2002). The connecting section (2001) is connected to the inner wall of the opening (19). The angle between the connecting section (2001) and the side wall of the insertion tip (18) is smaller than the angle between the movable section (2002) and the side wall of the insertion tip (18).

7. The intravenous infusion set according to claim 6, characterized in that, The diameter of the receiving cylinder (11) is larger than the diameter of the rubber sheet (7) so that the receiving cylinder (11) can block the rubber sheet (7).

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