Vein infusion apparatus

Abstract

The invention discloses an intravenous infusion apparatus, and relates to the technical field of infusion apparatuses. The device comprises a Murphy dropper, one end of the Murphy dropper is provided with a second hose, the other end of the Murphy dropper is provided with a first hose, and the first hose is connected with an infusion bottle. The first hose is connected with an infusion bottle, the mounting shell is mounted below the Murphy's dropper, during use, when liquid medicine moves into the mounting shell through the Murphy's dropper, the liquid medicine firstly passes through the liquid inlet cavity, and the liquid medicine in the liquid inlet cavity enables the air bag to drive the shielding plate to rotate to remove shielding of the through hole through buoyancy; when the liquid medicine in the infusion bottle is completely infused, the buoyancy of the liquid in the liquid inlet cavity is smaller than the gravity of the empty bag ball, so that the empty bag ball shields a pipe opening of the third hose, and the possibility that air moves into the third hose to affect the safety of a patient is reduced; and the safety of the device in use is improved.

Description

Technical Field

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

[0002] An intravenous infusion set is a common medical device, mainly used for intravenous infusion in hospitals. Made of medical PVC, the infusion set is durable and stable, has higher strength, a smooth bevel, and a needle made of high-quality stainless steel. The flow rate is controllable and a pulley switch is used for easy control.

[0003] When the existing intravenous infusion set is actually used, after the hanging water is finished, air will continue to be transported into the patient's body along the infusion tube. The infusion hose needs to be clamped in time with a tube clamp. If medical staff or patients and other relevant personnel fail to notice it in time and fail to replace the hanging water bottle or pull out the needle, there will be a safety hazard. The intravenous infusion set is not equipped with a structure to block air. As a result, when the above situation occurs, the intravenous infusion set cannot protect the patient well.

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

[0005] The purpose of the present invention is to solve the problems in the above-mentioned background technology, and the present invention provides an intravenous infusion set.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] An intravenous infusion set includes a Murphy-type dropper, a second hose is installed at one end of the dropper, and a first hose is installed at the other end, the first hose is used to connect to an infusion bottle, and further includes:

[0008] a mounting shell, mounted on the second hose, a partition plate mounted in the mounting shell, the partition plate dividing the interior of the mounting shell into a liquid inlet chamber and a liquid outlet chamber, the liquid inlet chamber being connected to the second hose, a through hole for connecting the liquid inlet chamber and the liquid outlet chamber, a filter plate mounted in the through hole, a third hose connected to the patient mounted on the liquid outlet chamber, a hollow balloon mounted in the liquid outlet chamber, and when the hollow balloon falls, the hollow balloon blocks the tube opening of the third hose located in the liquid outlet chamber;

[0009] The shielding plate is rotatably mounted on the partition plate, the shielding plate is located in the liquid inlet cavity, an air bag is installed on the shielding plate, and the shielding plate is used to shield the through hole.

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

[0011] Furthermore, an arc-shaped spring plate is installed in the liquid inlet chamber, one side of the arc-shaped spring plate contacts one side of the contact plate, and a limiting block is installed on the partition plate. The limiting block is located on the side of the pushing plate away from the shielding plate. When the contact plate is pushed by the arc-shaped spring plate, the limiting block is located on the movement path of the pushing plate.

[0012] Furthermore, a accommodating cylinder is installed on the outer wall of the mounting shell on one side of the liquid inlet chamber, and a resistance rod is slidably installed on the accommodating cylinder. One side of the resistance rod passes through the accommodating cylinder and is located outside the accommodating cylinder, and the other end of the resistance rod is in contact with the rubber sheet. When the pushing plate contacts the limiting block, the resistance 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 liquid outlet cavity, the opening of one end of the outlet pipe faces the third hose, and the opening of 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 hose, and an outlet slit is opened on the valve.

[0014] Furthermore, a plurality of limiting plates are installed in the liquid outlet cavity. The limiting plates are arranged in a circular array around the third hose orifice along the axis of the third hose. The balloon balls are located between the limiting plates and the limiting plates do not contact the balloon balls.

[0015] Furthermore, a tilting rod is installed on one side of the shielding plate. When the shielding plate blocks the through hole, the tilting rod is located on the side of the shielding plate close to the limiting block.

[0016] Furthermore, an insertion tip is installed on the first hose, and an inner cavity connected to the first hose lumen is opened on the insertion tip, and a through hole connected to the inner cavity is opened on the side wall of the insertion tip. An elastic clip is installed in the through hole, and one side of the elastic clip is connected to one side of the inner wall of the through hole. A protrusion is formed on the elastic clip, so that the diameter of the insertion tip where the elastic clip is installed is larger than the diameter of the insertion tip.

[0017] Furthermore, the protrusion on the elastic card plate forms a connecting section and a movable section on the elastic card plate, the connecting section is connected to the inner wall of the through opening, and the angle between the connecting section and the side wall of the inserted tip is smaller than the angle between the movable section and the side wall of the inserted tip.

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

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

[0020] The present invention is connected to the infusion bottle through a first hose, and the mounting shell is installed below the Murphy-type dropper. During use, when the medicine liquid flows into the mounting shell through the Murphy-type dropper, it first passes through the liquid inlet cavity. The medicine liquid in the liquid inlet cavity causes the airbag to drive the baffle to rotate through the buoyancy, thereby releasing the obstruction of the through hole. At this time, the medicine liquid can enter the liquid outlet cavity. At this time, the empty balloon ball floats up through the buoyancy. When the medicine liquid in the infusion bottle is completely infused, the buoyancy of the liquid in the liquid inlet cavity is less than the gravity of the empty balloon ball. The empty balloon ball blocks the tube mouth of the third hose, thereby reducing the possibility of air moving into the third hose and thus affecting the safety of the patient, thereby increasing the safety of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0024] Figure 4 This is a schematic structural diagram of the partition plate in the liquid outlet cavity of the present invention;

[0025] Figure 5 This is a structural diagram of the partition plate in the liquid inlet cavity of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the present invention on the plug-in tip;

[0027] Figure 7 It is an exploded view of part of the structure of the present invention;

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

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

[0030] Figure 10 This is another three-dimensional cross-sectional view of the mounting shell structure of the present invention;

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

[0032] Figure numerals: 1. Murphy-type dropper; 101. second hose; 102. first hose; 2. mounting shell; 201. partition plate; 202. liquid outlet chamber; 203. through hole; 204. balloon; 205. liquid inlet chamber; 206. filter plate; 3. third hose; 4. shielding plate; 401. air bag; 5. rotating rod; 6. pushing plate; 7. rubber sheet; 8. contact plate; 9. arc-shaped spring plate; 10. limiting block; 11. accommodating cylinder; 12. interference rod; 13. outlet tube; 14. valve; 15. outlet slit; 16. limiting plate; 17. tilting rod; 18. inserted tip; 19. through port; 20. elastic card; 2001. connecting section; 2002. movable section. DETAILED DESCRIPTION

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

[0034] like Figure 1 - Figure 11 As shown, an intravenous infusion device proposed in an embodiment of the present invention includes a Murphy-type dropper 1, a second hose 101 is installed at one end of the device, and a first hose 102 is installed at the other end. The first hose 102 is used to connect to an infusion bottle. The first hose 102 is inserted into the infusion bottle through a puncture needle or other sharp tubular structure, so that the device can be connected to the infusion bottle. When the device is in use, the first hose 102 is located above the Murphy-type dropper 1 and the second hose 101 is located below it. The Murphy-type dropper 1 is a prior art device that is connected to the outside world. Before infusion, after the device is connected to the infusion bottle, it is necessary to vent the device so that 1 / 2 to 2 / 3 of the liquid volume is maintained in the Murphy-type dropper 1 to form a liquid level barrier to prevent air from entering the blood vessel. The device also includes:

[0035] The mounting shell 2 is mounted on the second hose 101. Since the second hose 101 is located below the Murphy's dropper 1, the mounting shell 2 is located below the Murphy's dropper 1. The liquid in the infusion bottle first passes through the Murphy's dropper 1 and then enters the mounting shell 2. A partition plate 201 is installed in the mounting shell 2. The partition plate 201 divides the interior of the mounting shell 2 into a liquid inlet chamber 205 and a liquid outlet chamber 202. The partition plate 201 is located in the middle of the cavity of the mounting shell 2, dividing the mounting shell 2 into two parts in the vertical direction. The liquid outlet cavity 202 and the liquid inlet cavity 205 are formed, and the liquid inlet cavity 205 is connected to the second hose 101. The partition plate 201 is provided with a through hole 203 for connecting the liquid inlet cavity 205 with the liquid outlet cavity 202. A filter plate 206 is installed in the through hole 203. The filter plate 206 is connected to the semipermeable membrane in the prior art, so that the filter plate 206 can filter impurities in the liquid medicine. The third hose 3 connected to the patient is installed on the liquid outlet cavity 202. The free end of the third hose 3 is the same as the existing method. The top of the liquid inlet cavity 205 is connected to the second hose 101, and the bottom of the liquid outlet cavity 202 is connected to the third hose 3. The partition plate 201 is in the shape of a circular plate. The diameter of the partition plate 201 in the vertical direction is used as the reference line. The position of the through hole 203 is located at two-thirds of the reference line from bottom to top, so that the position of the through hole 203 is higher. A hollow balloon 204 is installed in the liquid outlet cavity 202. When the hollow balloon 204 falls, the hollow balloon 204 will The orifice of the third hose 3 is located in the liquid outlet cavity 202 to block the flow, and the cross-sections of the liquid inlet cavity 205 and the liquid outlet cavity 202 are circular. The orifice of the third hose 3 is located at the lowest point of the liquid outlet cavity 202, so that when there is no liquid medicine in the liquid outlet cavity 202, the empty balloon 204 is guided by the gravity and the curved surface of the inner wall of the liquid outlet cavity 202 at the orifice of the third hose 3, and the inner wall of the orifice of the third hose 3 is beveled, so that the orifice of the third hose 3 can accommodate part of the empty balloon 204, such as Figure 11 As shown, the shielding effect of the hollow balloon 204 on the third hose 3 is increased;

[0036] When the medicine liquid enters the mounting shell 2, it is first located in the liquid inlet cavity 205. When the liquid level overflows the through hole 203, the medicine liquid enters the liquid outlet cavity 202. When the medicine liquid in the liquid outlet cavity 202 increases, the buoyancy generated by the medicine liquid on the balloon ball 204 also gradually increases, so that the balloon ball 204 will not block the tube mouth of the third hose 3. When the medicine liquid in the infusion bottle is infused, the medicine liquid in the liquid inlet cavity 205 will gradually flow to the liquid outlet cavity 202 until the liquid level is lower than the through hole 203. The medicine liquid in the liquid outlet cavity 202 gradually enters the third hose 3. The loss of the replenishment of the medicine liquid from the infusion bottle causes the medicine liquid in the liquid outlet cavity 202 to gradually decrease. At this time, the buoyancy generated by the medicine liquid in the liquid outlet cavity 202 on the balloon ball 204 is less than the gravity of the balloon ball 204, causing the balloon ball 204 to fall. Since the position of the third hose 3 is located in the liquid outlet cavity 2 02 is the lowest point. When the balloon ball 204 falls, it is guided by the curved surface of the inner wall of the liquid outlet cavity 202, so that the balloon ball 204 can move to the tube mouth of the third hose 3, and then block the tube mouth of the third hose 3 to block the air. Since the infusion set needs to achieve internal and external air pressure balance through the Murphy-type dropper 1, when the balloon ball 204 blocks the tube mouth of the third hose 3, and the other end of the third hose 3 is connected to the patient, when the tube mouth of the third hose 3 is blocked by the balloon ball 204, the internal and external air pressure of the third hose 3 is unbalanced, and the liquid medicine will continue to flow out for a period of time. After that, negative pressure is formed in the third hose 3, and the air cannot be replenished, resulting in a sudden drop in the liquid flow rate or even a complete stop. This allows a section of liquid medicine to be retained in the third hose 3 to seal the third hose 3, reducing the possibility of air continuing to enter the patient's body downward and increasing the safety of the device.

[0037] The shielding plate 4 is rotatably mounted on the partition plate 201. The shielding plate 4 is located in the liquid inlet cavity 205. An air bag 401 is mounted on the shielding plate 4. The shielding plate 4 is used to block the through hole 203. The shielding plate 4 is in the shape of a circular plate. Figure 1 From the main viewing angle, the shielding plate 4 is provided with a rotating rod along the vertical upward direction, such as Figure 11As shown, the shielding plate 4 is rotatably mounted on the partition plate 201 by a rotating rod. At this time, the rotating rod can be located above the through hole 203. Therefore, when the liquid inlet chamber 205 is not filled with liquid medicine, the shielding plate 4 can naturally droop under the influence of gravity and can block the through hole 203. When the liquid inlet chamber 205 is filled with liquid medicine, the buoyancy of the liquid medicine can lift the air bag 401, driving the shielding plate 4 to rotate, thereby releasing the shielding plate 4 from blocking the through hole 203. When the liquid medicine is input, the buoyancy of the liquid medicine in the liquid inlet chamber 205 is insufficient to support the air bag 401 to float. Since the center of gravity of the shielding plate 4 is close to the side where the air bag 401 is installed, the shielding plate 4 can be rotated downward to reset and block the through hole 203, further reducing the possibility that air in the Murphy's dropper 1 enters 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 through the first hose 102, and the mounting shell 2 is installed below the Murphy's dropper 1. During use, when the medicinal liquid passes through the Murphy's dropper 1 and moves into the mounting shell 2, it first passes through the liquid inlet cavity 205. The medicinal liquid in the liquid inlet cavity 205 uses the buoyancy to cause the air bag 401 to drive the baffle plate 4 to rotate to release the obstruction of the through hole 203, so that the medicinal liquid can enter the liquid outlet cavity 202. At this time, the buoyancy also causes the balloon ball 204 to float up. When the medicinal liquid in the infusion bottle is exhausted, the buoyancy of the liquid in the liquid inlet cavity 205 is less than the gravity of the balloon ball 204, so that the balloon ball 204 blocks the tube mouth of the third hose 3, thereby reducing the possibility of air moving into the third hose 3 and affecting the patient's safety, thereby increasing the safety of the device during use.

[0039] like Figure 2 、 Figure 5 、 Figure 9 and Figure 11As shown, part of the structure on the partition plate 201 is disclosed. A rotating rod 5 is rotatably installed on one side of the partition plate 201 located in the liquid inlet chamber 205. A rotating block is installed on the rotating rod 5. A cavity rotatably connected to the rotating block is provided on the partition plate 201, so that the rotating rod 5 is rotatably connected to the partition plate 201. A pushing plate 6 is installed on the side wall of the rotating rod 5. The pushing plate 6 is used to push the shielding plate 4. The pushing plate 6 fits the surface of the partition plate 201. When the rotating rod 5 is rotated, the pushing plate 6 is driven to move closer to or away from the shielding plate 4. When the pushing plate 6 approaches the shielding plate 4 and contacts the shielding plate 4, the force generated by the pushing plate 6 on the shielding plate 4 is along There is a component force in the horizontal direction, which provides an initial force for the rotation of the shielding plate 4, so that the shielding plate 4 can rotate smoothly. A rubber sheet 7 is installed on the side wall of the mounting shell 2 on the side of the liquid inlet chamber 205. The end of the rotating rod 5 is installed with a contact plate 8 that contacts the rubber sheet 7. A channel is opened in the middle of the mounting shell 2. The rubber sheet 7 is made of medical rubber and is fixed in the above-mentioned channel by heat sealing. Because the rubber sheet 7 is relatively soft, medical staff can contact the contact plate 8 by pressing the rubber sheet 7 and push the contact plate 8, thereby driving the rotating rod 5 and the pushing plate 6 to rotate, so that the pushing plate 6 pushes the shielding plate 4;

[0040] When the device is in use, when the medicine liquid enters the liquid inlet chamber 205, as the medicine liquid gradually increases, the buoyancy of the medicine liquid on the airbag 401 gradually increases. However, since the rotation point of the shielding plate 4 is located just above the through hole 203, the buoyancy is an upward force, and the movement trajectory of the shielding plate 4 is rotation, which is easy to get stuck. At this time, the medical staff pushes the contact plate 8 through the rubber sheet 7 to make the rotating rod 5 rotate and drive the push plate 6 to push the shielding plate 4, applying a horizontal component of force to the shielding plate 4, so that the shielding plate 4 can rotate smoothly, increasing the feasibility of the device, and the shielding plate 4 is rotated. A dynamic setting rather than a linear sliding setting has the following advantages. If the baffle plate 4 is a sliding setting, the buoyancy of the baffle plate 4 by the medicine liquid needs to completely counteract the gravity of the baffle plate 4 when the baffle plate 4 slides up, while the baffle plate 4 is a rotating setting, and there is a rotating rod between the baffle plate 4 and the partition plate 201. When the baffle plate 4 is rotated to release the obstruction of the through hole 203, the rotating rod is located at the lowest point of the baffle plate 4 to play a supporting role. The rotating rod can also share part of the gravity of the baffle plate 4. At this time, the gravity of the baffle plate 4 is shared by the buoyancy and the supporting force of the rotating rod, so that the buoyancy generated by the medicine liquid does not need to be too large, thereby increasing the feasibility of the device.

[0041] like Figure 2 and Figure 5As shown, part of the structure inside the liquid inlet chamber 205 is disclosed. The mounting shell 2 is provided with an arc-shaped spring plate 9 in the liquid inlet chamber 205. 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 shielding 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 with each other. For the convenience of subsequent description, the side of the two closer to the shielding plate 4 along the projection is set as the reset side, and the side away from the shielding plate 4 along the projection is set as the limit 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 limit side of the push plate 6. The arc-shaped spring plate 9 is made of medical plastic and has elasticity.

[0042] When the device needs to contact the shielding plate 4 through the pushing plate 6, the pushing plate 6 needs to move from the limiting side to the resetting side. The medical staff will toggle the contact plate 8 on the limiting side of the contact plate 8, so that the contact plate 8 drives the rotating rod 5 to rotate and then drives the pushing plate 6 to push the shielding plate 4. At the same time, the contact plate 8 also contacts and presses the arc-shaped spring plate 9. During the whole process of the pushing plate 6 contacting the shielding plate 4, the pushing plate 6 always contacts the shielding plate 4 through its resetting side, and does not rotate offside to make its own limiting side contact with the shielding plate 4, so that when the pushing plate 6 is subsequently reset, it will not affect the shielding plate 4.

[0043] When the shielding plate 4 releases the obstruction of the through hole 203, the finger in contact with the contact plate 8 is released. At this time, the arc spring plate 9 is reset through elastic deformation, so that it pushes the contact plate 8 to move from the reset side to the limit side, and also drives the rotating rod 5 and the pushing plate 6 to move in the same direction until the pushing plate 6 contacts the limiting block 10. The limiting block 10 blocks the pushing plate 6 and limits the movement of the pushing plate 6 to facilitate subsequent use. Among them, although the infusion set is a disposable product, the patient needs to hang more than one bottle of water when hospitalized. When one bottle is hung up, the device needs to be connected to the infusion bottle that needs to be hung next. Therefore, the arc spring plate 9 and the limiting block 10 and other structures are provided to facilitate the resetting of the pushing plate 6 for subsequent adjustment and use, thereby increasing the practicality of the device.

[0044] like Figure 2 and Figure 9As shown, part of the structure on the mounting shell 2 is disclosed. The outer wall of the mounting shell 2 is mounted with a receiving cylinder 11 on one side of the liquid inlet chamber 205. A resistance rod 12 is slidably mounted on the receiving cylinder 11. One side of the resistance rod 12 passes through the receiving cylinder 11 and is located outside the receiving cylinder 11. The other end of the resistance rod 12 contacts the rubber sheet 7. When the push plate 6 contacts the limiting block 10, the resistance 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 resistance rod 12 and the contact plate 8 are located is located on the limiting side of the contact plate 8. , a channel is opened on the accommodating cylinder 11, the channel is used to accommodate the interference rod 12, and the inner wall of the channel is in contact with the side wall of the interference rod 12. When the interference 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 interference rod 12 when sliding. The end of the interference rod 12 in contact with the rubber sheet 7 has a rounded corner, which reduces the possibility of the rubber sheet 7 being damaged due to the sharp edge of the end face of the interference rod 12 when the interference rod 12 conflicts with the rubber sheet 7, thereby increasing the practicality of the device;

[0045] When the device is not in use, the limiting side of the push plate 6 contacts the limiting block 10. At this time, the end of the interference rod 12 is located on the limiting side of the contact plate 8. When the push plate 6 needs to be rotated, the interference rod 12 is pressed toward the rubber sheet 7 so that the interference rod 12 interferes with the rubber sheet 7 and applies force to the limiting side of the contact plate 8, so that the contact plate 8 can move toward the arc-shaped spring plate 9, thereby driving the push plate 6 to interfere with the shielding plate 4. When the pressing is completed, since the rubber sheet 7 is made of medical rubber and has elasticity, the interference rod 12 can be reset by resetting the rubber sheet 7. When in use, the push plate 6 is driven only by pressing the interference rod 12, which greatly increases the convenience of operating the device.

[0046] like Figure 8 and Figure 10 As shown, the structure installed on the partition plate 201 is disclosed. The partition plate 201 is provided with an outlet pipe 13 on one side facing the liquid outlet chamber 202. The opening of one end of the outlet pipe 13 faces the third hose 3, and the opening of the other end of the outlet pipe 13 is connected to the through hole 203. The valve 14 is provided at the opening of the outlet pipe 13 facing the third hose 3. The valve 14 is provided with an outlet slit 15. The outlet pipe 13 is L-shaped. Figure 1From the main perspective, one section of the outlet tube 13 is in the horizontal direction, and the other section is in the vertical direction. The section in the horizontal direction is connected to the through hole 203, and the section in the vertical direction has the tube opening facing the bottom of the inner wall of the liquid outlet cavity 202, and a valve 14 is installed at the tube opening. The valve 14 is made of medical rubber or polymer material and is used to block the tube opening. The outlet slit 15 is a slit cut on the valve 14, and the slit has two inner walls. In normal state, the inner walls contact each other and complete the closure by friction. When the liquid is in When the liquid drops into the tube, the gravity of the liquid and its downward potential energy impact the valve 14, causing the outlet slit 15 to open, and the liquid can flow smoothly into the liquid outlet cavity 202. After the liquid is input, even if some air enters the through hole 203 during the downward rotation of the shielding plate 4, it is difficult to blow the outlet slit 15 open simply by the blowing of the airflow, further reducing the possibility of airflow entering the liquid outlet cavity 202, thereby reducing the possibility of liquid entering the third hose 3, and increasing the safety of the device when in use.

[0047] The mounting shell 2 is made of a relatively hard plastic, and its main body can also be pinched. When performing preliminary exhaust, the third hose 3 can be clamped first and then the mounting shell 2 can be directly pinched to form a negative pressure in the liquid outlet cavity 202, which can quickly absorb the liquid medicine and facilitate the rapid floating of the balloon ball 204. The operation here is consistent with the clinical operation of quickly injecting liquid into the Murphy's dropper 1.

[0048] like Figure 10 The figure shows the structure in the liquid outlet chamber 202. A plurality of limiting plates 16 are installed in the liquid outlet chamber 202. The limiting plates 16 are arranged in a circular array around the tube opening of the third tube 3 along the axial direction of the third tube 3. The balloon ball 204 is located between the limiting plates 16 and the limiting plates 16 do not contact the balloon ball 204. The plurality of limiting plates 16 surround the tube opening of the third tube 3. A cavity for accommodating the balloon ball 204 is formed between the limiting plates 16. When the balloon ball 204 floats up, its movement path is blocked by the limiting plates 16, so that the balloon ball 204 can be above the third tube 3 when floating. When the balloon ball 204 falls, it can move to the tube opening of the third tube 3 more quickly and cover it, thereby reducing the possibility that the balloon ball 204 shakes around in the liquid outlet chamber 202, resulting in the balloon ball 204 failing to block the tube opening of the third tube 3 in time after the liquid in the liquid outlet chamber 202 is delivered, thereby increasing the practicality of the device.

[0049] Moreover, when the empty balloon ball 204 is located at the mouth of the third hose 3, the limiting plate 16 does not contact the empty balloon ball 204, so that when the empty balloon ball 204 floats up, the limiting plate 16 will not generate resistance to the rise of the empty balloon ball 204 through friction, thereby 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 close to the limiting block 10. The tilting rod 17 is made of medical plastic. The tilting rod 17 is used to deviate the center of gravity of the shielding plate 4. When the shielding plate 4 is in a state of releasing the blocking of the through hole 203, the tilting rod 17 is located on the side of the shielding plate 4 away from the pushing plate 6, so that when the buoyancy applied by the medical solution to the airbag 401 is less than the gravity of the shielding plate 4 and its upper components, since the gravity of the shielding plate 4 is located at the tilting rod 17, the airbag 401 is blocked. Figure 5 As shown, the shielding plate 4 is rotated in the counterclockwise direction, so that it can smoothly block the through hole 203, reducing the impact of the push plate 6 on the shielding plate 4 when it rotates and resets, thereby increasing the feasibility of the device;

[0051] When the shielding plate 4 is in a position to shield the through hole 203, the position between the tilting rod 17 and the pushing plate 6 is as follows: Figure 9 As shown, the tilt rod 17 does not affect the shielding effect of the shielding plate 4 on the through hole 203.

[0052] like Figure 6 As shown, the structure on the first hose 102 is disclosed. The first hose 102 is equipped with an insertion tip 18. The insertion tip 18 is provided with an inner cavity connected to the first hose 102 lumen. The side wall of the insertion tip 18 is provided with a through hole 19 connected to the inner cavity. An elastic card 20 is installed in the through hole 19. One side of the elastic card 20 is connected to one side of the inner wall of the through hole 19. A protrusion is formed on the elastic card 20, so that the diameter of the insertion tip 18 where the elastic card 20 is installed is larger than the diameter of the insertion tip 18. The shape of the elastic card 20 is as shown in FIG. Figure 6 As shown, the first hose 102 is connected to the infusion bottle by inserting the pointed tip 18, and the first hose 102 is connected to the inside of the infusion bottle by inserting the pointed tip 18 through the rubber stopper on the infusion bottle. During the penetration process, a through hole is gradually formed on the rubber stopper of the infusion bottle. The inner wall of the hole will resist the elastic card plate 20, so that it is located in the through opening 19. When the inserted pointed tip 18 is completely inserted into the infusion bottle, the elastic card plate 20 also enters the infusion bottle. There is no object blocking the elastic card plate 20, so that The elastic clip 20 moves from the inside of the through-opening 19 to the outside of the through-opening 19, so that the diameter of the insertion tip 18 is larger than the diameter of the hole on the rubber stopper of the infusion bottle. Since the present invention has additional components installed under the Murphy-type dropper 1, the overall weight of the device is increased. The increase in the diameter of the insertion tip 18 by the elastic clip 20 allows the insertion tip 18 to be more stably inserted into the infusion bottle, reducing the possibility of separation of the insertion tip 18 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 card plate 20 makes the elastic card plate 20 form a connecting section 2001 and a movable section 2002. The connecting section 2001 is connected to the inner wall of the through 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. Since the angle of the connecting section 2001 is small, 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 card plate 20 into the through opening 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 out, the insertion tip 18 can be smoothly pulled out through the guidance of the movable section 2002, thereby increasing the feasibility of the device.

[0054] like Figure 7 and Figure 11 As shown, the specific structure of the accommodating cylinder 11 is disclosed. The diameter of the accommodating cylinder 11 is larger than the diameter of the rubber sheet 7, so that the accommodating cylinder 11 can shield the rubber sheet 7. When in use, the rubber sheet 7 is shielded and protected by the accommodating cylinder 11, which reduces the possibility of the rubber sheet 7 being damaged due to contact with foreign objects and increases the practicality of the device.

[0055] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intravenous infusion set comprising a Murphy-type dropper (1), one end of which is provided with a second hose (101) and the other end of which is provided with a first hose (102), characterized in that: Also includes: The mounting shell (2) is mounted on the second hose (101). The mounting shell (2) is divided into a liquid inlet chamber (205) and a liquid outlet chamber (202) by a partition plate (201). The partition plate (201) is provided with a through hole (203). A filter plate (206) is installed in the through hole (203). The mounting shell (2) is mounted with a third hose (3). A hollow ball (204) is provided in the liquid outlet chamber (202). When the hollow ball (204) falls, the hollow ball (204) blocks the connection between the third hose (3) and the mounting shell (2). The shielding plate (4) is rotatably mounted on the partition plate (201) and is located in the liquid inlet cavity (205). An air bag (401) is mounted on the shielding plate (4). The shielding plate (4) is used to shield the through hole (203).

2. The intravenous infusion set with a filter according to claim 1, characterized in that: A rotating rod (5) is rotatably mounted on one side of the partition plate (201), a pushing plate (6) is mounted on the rotating rod (5), and the pushing plate (6) is used to push the shielding plate (4). A rubber sheet (7) is mounted on the side wall of the mounting shell (2), and a contact plate (8) in contact with the rubber sheet (7) is mounted on the end of the rotating rod (5).

3. The intravenous infusion set with a filter according to claim 2, characterized in that: An arc-shaped spring plate (9) is installed in the installation shell (2), one side of the arc-shaped spring plate (9) contacts one side of the contact plate (8), and a limiting block (10) is installed on the partition plate (201). The limiting block (10) is located on a side of the push plate (6) away from the shielding 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).

4. The intravenous infusion set with a filter according to claim 3, characterized in that: The outer wall of the mounting shell (2) is provided with a receiving tube (11), and a resisting rod (12) is slidably provided on the receiving tube (11). One side of the resisting rod (12) passes through the receiving tube (11) and is located outside the receiving tube (11). The other end of the resisting rod (12) contacts the rubber sheet (7). When the pushing plate (6) contacts the limiting block (10), the resisting rod (12) is located on the side of the contact plate (8) away from the arc-shaped spring plate (9).

5. The intravenous infusion set with a filter according to claim 4, characterized in that: An outlet pipe (13) is installed on one side of the partition plate (201), the opening of one end of the outlet pipe (13) faces the third hose (3), and the opening of the other end of the outlet pipe (13) is connected to the through hole (203). A valve (14) is installed at the opening of the outlet pipe (13) facing the third hose (3), and an outlet slit (15) is opened on the valve (14).

6. The intravenous infusion set with a filter according to claim 5, characterized in that: A plurality of limiting plates (16) are installed in the liquid outlet cavity (202), and the limiting plates (16) are arranged in a circular array around the tube opening of the third hose (3) along the axial direction of the third hose (3), and the hollow balloon (204) is located between the limiting plates (16) and does not contact the limiting plates (16).

7. The intravenous infusion set with a filter according to claim 6, characterized in that: A tilting rod (17) is installed on one side of the shielding plate (4); when the shielding plate (4) shields the through hole (203), the tilting rod (17) is located on the side of the shielding plate (4) close to the limiting block (10).

8. The intravenous infusion set with a filter according to claim 7, characterized in that: The first hose (102) is provided with an inserting tip (18), an inner cavity communicating with the first hose (102) is provided on the inserting tip (18), a through-hole (19) communicating with the inner cavity is provided on the side wall of the inserting tip (18), an elastic card (20) is provided in the through-hole (19), and a protrusion is formed on the elastic card (20), so that the diameter of the inserting tip (18) where the elastic card (20) is provided is larger than the diameter of the inserting tip (18).

9. The intravenous infusion set with a filter according to claim 8, characterized in that: The protrusion on the elastic card plate (20) enables the elastic card 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 through opening (19); and the angle between the connecting section (2001) and the side wall of the inserted tip (18) is smaller than the angle between the movable section (2002) and the side wall of the inserted tip (18).

10. The intravenous infusion set with a filter according to claim 9, characterized in that: The diameter of the accommodating cylinder (11) is greater than the diameter of the rubber sheet (7), so that the accommodating cylinder (11) shields the rubber sheet (7).

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