Infusion apparatus capable of finely adjusting speed

Abstract

The invention provides an infusion apparatus capable of finely adjusting the speed, and relates to the technical field of medical instruments. A flow regulator is mounted on the main tube body, a Murphy's dropper is fixedly connected to the main tube body, and a connector is arranged at the tail end of the main tube body; a first guide rail and a second guide rail are fixedly connected to the inner wall of the flow regulator, a movable clamping pipe is slidably clamped to the first guide rail, and a clamping wheel of the regulating wheel is slidably clamped to the second guide rail; a sliding groove is formed in the right end face of the second guide rail. Due to the three-section inclined structure of the second guide rail and the first guide rail, the position of the adjusting wheel on the flow adjuster can be adjusted after the adjusting wheel is pushed, when the adjusting wheel is located in the middle sections of the guide rails, the inclination angle is small, the adjusted dripping speed range is smaller, and therefore fine adjustment of flow can be achieved. The problem that the speed regulation precision of an existing infusion apparatus is not fine enough is solved.

Description

Technical Field

[0001] The present invention aims to provide an infusion device with fine speed regulation to achieve more refined drip rate regulation, and belongs to the technical field of medical devices. Background Art

[0002] In the medical field, infusion is an extremely common and important treatment method. Accurately controlling the infusion speed plays a key role in ensuring treatment efficacy and protecting patient safety. Traditional infusion pumps mostly use a roller-type speed regulation structure. Its principle is to change the pressure degree of the infusion tube by rolling the roller on the infusion tube, thereby adjusting the infusion flow rate. However, this speed regulation method has obvious defects: First, infants, children with impaired cardiopulmonary function or patients with kidney disease have relatively low requirements for the drip rate of intravenous infusion, while patients with severe dehydration have relatively high requirements for the drip rate of intravenous infusion. The traditional speed regulating wheel has low speed regulation accuracy. Since the contact area between the roller and the infusion tube is large and the movement of the roller is difficult to achieve tiny precise control, it often cannot meet the treatment scenarios with strict requirements on the infusion speed when adjusting the infusion speed.

[0003] On the other hand, for an infusion set equipped with an elastic structure that can be pressed to push an adjustment wheel to adjust the drip rate, since the drip rate needs to be adjusted by pressing once, after the adjustment is completed, the elastic structure pushes the adjustment wheel to reset or fix it, and it will be a certain distance away from the infusion tube. Although the adjustment wheel can be fixed, the drip rate will change after fixation, making it difficult to ensure that the adjusted drip rate is the fixed drip rate.

[0004] In addition, existing infusion sets also have shortcomings in terms of dripping out the medicine liquid. For example, when taking expensive medicine, the medicine liquid in the Murphy's dropper should be drained out before the needle is removed to minimize waste. However, the bottom of the existing Murphy's dropper is a flat structure, and the bottom of the Murphy's dropper is higher than the height of the bottom of the tube. This height difference causes the medicine liquid to remain, making it difficult to drip out the medicine liquid, resulting in a certain degree of waste. Summary of the Invention

[0005] The main purpose of the present invention is to provide an infusion device with fine speed regulation to solve the problems of existing infusion devices such as insufficient speed regulation accuracy, difficulty in fixing and adjusting the dripping rate, and difficulty in dripping the liquid. The specific solution is as follows:

[0006] A finely adjustable speed infusion device, specifically comprising: a main body; a flow regulator is mounted on the main body, a Murphy's dropper is fixedly connected to the main body, and a connector is provided at the end of the main body; a first guide rail and a second guide rail are fixedly connected to the inner wall of the flow regulator, a movable clamping tube is slidably engaged with the first guide rail, and a clamping wheel with an adjusting wheel is slidably engaged with the second guide rail; a slide groove is provided on the right end face of the second guide rail; the bottom of the Murphy's dropper is a sloped structure, and an exhaust pipe is provided at the bottom of the Murphy's dropper; a through-tube base is fixedly connected to the bottom of the exhaust pipe and the inner side of the Murphy's dropper; a radial through-hole is provided inside the through-tube base, and the bottom edge of the through-hole is lower than the Murphy's dropper The lowest height of the slope at the bottom of the tube; the right side of the adjusting wheel is fixedly connected to a clamping wheel, a clamping groove is provided on the right side of the clamping wheel, and a connecting pipe is fixedly provided on the left side of the adjusting wheel; a threaded groove is provided inside the connecting pipe, and a connecting piece is connected to the inside of the connecting pipe through a thread; the left end of the connecting piece is integrally formed with a circular plate, a cavity is provided inside the circular plate, and a spring plate is clamped inside the cavity; the left end of the spring plate is fixedly connected to a spring, and the left end of the spring is fixedly connected to the inside of the movable clamping tube; a clamping piece is clamped in the clamping groove on the right end face of the clamping wheel; a rod is fixedly connected to the clamping piece, and rubber wheels are rotatably clamped at both ends of the rod; the rubber wheel is clamped in the sliding groove on the right side of the second guide rail.

[0007] More preferably, two second guide rails are provided, a tooth plate 1 is provided on the right side of the outer second guide rail, and a tooth plate 2 is provided on the outer side surface of the inner second guide rail, and the width of the tooth plate 2 is greater than the width of the tooth plate 1, the tooth plate is meshed with the card wheel, the inclination angle of the second guide rail is the same as that of the first guide rail, and both are three-stage inclination structures.

[0008] More preferably, a dosing tube is provided on the outer side of the top of the Murphy's dropper, and the dosing tube is connected to the end of the tube connected to the Murphy's dropper by interference fit. After the dosing tube is removed, a small dose of medicine can be added at the Murphy's dropper. The dosing tube can also serve as an exhaust, eliminating the need for a traditional infusion set to connect an external hose for exhaust, reducing the use of consumables and lowering production costs.

[0009] More preferably, the connector is clamped with a socket connector, the outer wall of the connector is provided with two clamping rings, and the inner wall of the socket connector is provided with two annular grooves. When the connector is clamped with the socket connector, the clamping rings are clamped in the annular grooves, and the end of the socket connector is connected to an intravenous infusion needle, and the outer part of the intravenous infusion needle is sleeved with a protective sleeve, and the top of the protective sleeve is provided with a through hole that is narrow at the top and wide at the bottom. Before the medical staff prepares for infusion, the medicine is released to flow until the medicine flows out of the intravenous infusion needle. After the medicine flows out, since the top through hole of the protective sleeve is narrow at the top and wide at the bottom, the medicine will fill the inside of the protective sleeve and then flow out, so that the inside and outside of the intravenous infusion needle can be flushed, ensuring that there is no air inside the main body and the intravenous infusion needle, and also reducing some of the waste of medicine.

[0010] More preferably, the outer wall of the clamping piece is provided with teeth, and the number of teeth is the same as the number of teeth on the outer wall of the adjusting wheel. After the adjusting wheel is turned to the left, the clamping wheel is driven to disengage from the tooth part of the clamping piece, but the left end shaft of the clamping piece is still clamped in the clamping wheel. After moving the adjusting wheel, the clamping piece is driven to move synchronously, and the rubber wheel moves in the slide groove on the second guide rail. The friction force between the rubber wheel and the second guide rail and the flow regulator can support the position of the adjusting wheel to remain fixed.

[0011] More preferably, a slot is provided on the left side of the first guide rail and between the two first guide rails, and a circular plate with a protruding diameter on the left side of the movable clamping tube is clamped inside the slot. When the position of the adjusting wheel is moved, the movable clamping tube is driven to move synchronously, and the slot provides an axial limit for the movement of the circular plate.

[0012] More preferably, the outer wall of the card wheel is provided with teeth, and the number of teeth is the same as that of the outer wall of the adjusting wheel, and the width of the card wheel is the same as the width of the tooth plate one. When the adjusting wheel is moved to the left, the card wheel disengages from the tooth plate one, so that it can engage with the tooth plate two to realize rotation, thereby changing the squeezing force on the main body and realizing fine adjustment of the dripping rate.

[0013] More preferably, the top surface of the flow regulator is engraved with an arrow pattern pointing to the left, and the upper and lower plates of the flow regulator are provided with circular holes, the interior of the circular holes is penetrated by the main pipe, the middle of the exhaust pipe is a hollow structure, and an annular plate is provided on the top. After the medicine drops to the annular plate, it is hit by a larger area, thereby avoiding the generation of bubbles. The hollow structure in the middle of the exhaust pipe can realize automatic exhaust to ensure that no air is involved in the flowing medicine.

[0014] The present invention provides an infusion device with fine speed regulation, which has the following beneficial effects:

[0015] After the flow rate is adjusted, the regulating wheel of the present invention is pushed back to the right and simultaneously pushes the clamping wheel to move to the right. The clamping groove on the right side of the clamping wheel cooperates with the toothed portion of the clamping piece to achieve clamping connection, and the friction between the rubber wheel and the flow regulator can keep the position of the clamping piece fixed, thereby achieving fixed clamping connection, and the position of the regulating wheel is fixed and will not change, ensuring that after the regulating wheel is adjusted, the adjusted dripping rate is the final dripping rate.

[0016] In addition, the three-section tilting structure of the second guide rail and the first guide rail can adjust its position on the flow regulator by pushing the adjusting wheel. When the adjusting wheel is in the middle section of the guide rail, the tilting angle is smaller and the adjustable drip rate range is smaller, thereby achieving fine adjustment of the flow rate.

[0017] In addition, the sloped structure at the bottom of the Murphy's dropper and the radial holes inside the base of the tube allow all the liquid medicine inside the Murphy's dropper to flow out, reducing the waste of expensive liquid medicine.

[0018] In addition, before medical staff prepare for infusion, they release the flow of liquid medicine until it flows out of the intravenous infusion needle. The liquid medicine will fill the inside of the protective cover and then flow out, so that the inside and outside of the intravenous infusion needle can be flushed, ensuring that there is no air inside the main body and the intravenous infusion needle, and reducing some liquid medicine waste.

[0019] The design of the clamp on the connector allows you to feel two clicks when assembling the intravenous infusion needle, thus ensuring the connection is in place. When using a retention needle, the clamp can also increase the tightness of the connection with the retention needle interface, ensuring a stable connection and will not fall off easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0021] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached figure:

[0023] Figure 1 The figure shows the overall structure of an infusion device capable of fine speed regulation according to the present invention;

[0024] Figure 2 A schematic cross-sectional view of a Murphy's dropper of an infusion device capable of fine speed regulation according to the present invention is shown;

[0025] Figure 3 A schematic structural diagram of a flow regulator of an infusion device capable of fine speed regulation according to the present invention is shown;

[0026] Figure 4 A schematic cross-sectional view of a flow regulator of an infusion device capable of fine speed regulation according to the present invention is shown;

[0027] Figure 5 A schematic diagram of the expanded structure between the regulating wheel and the flow regulator of an infusion device capable of fine speed regulation according to the present invention is shown;

[0028] Figure 6 A schematic cross-sectional view of a protective cover of an infusion device capable of fine speed regulation according to the present invention is shown;

[0029] Figure 7 The invention shows a fine speed adjustable infusion device Figure 5 Schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 8 The invention shows a fine speed adjustable infusion device Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 9 A schematic structural diagram of a second guide rail of an infusion device capable of fine speed adjustment according to the present invention is shown;

[0032] Figure 10 A schematic diagram of the expanded structure between the regulating wheel and the clamping piece of an infusion device capable of fine speed regulation according to the present invention is shown;

[0033] Figure 11 A schematic structural diagram from the right side view of a second guide rail of an infusion device with fine speed adjustment according to the present invention is shown.

[0034] Reference Signs List

[0035] 1. Main body; 101. Connector; 102. Socket; 1021. Intravenous infusion needle; 10211. Protective cover; 2. Flow regulator; 201. First guide rail; 202. Mobile clamping tube; 203. Second guide rail; 3. Murphy's dropper; 301. Dosing tube; 302. Exhaust pipe; 303. Through-tube base; 4. Adjusting wheel; 401. Connecting tube; 402. Connecting piece; 403. Spring plate; 404. Clamping wheel; 5. Clamping piece; 501. Rubber wheel. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example: Please refer to the accompanying drawings in the specification Figures 1 to 11 :

[0038] The present invention provides an infusion device with fine speed regulation, comprising: a main body 1; a flow regulator 2 is installed on the main body 1, a Murphy's dropper 3 is fixedly connected to the main body 1, and a connector 101 is provided at the end of the main body 1; a first guide rail 201 and a second guide rail 203 are fixedly connected to the inner wall of the flow regulator 2, a movable clamping tube 202 is slidably clamped on the first guide rail 201, and a clamping wheel 404 of an adjusting wheel 4 is slidably clamped on the second guide rail 203; a sliding groove is provided on the right end face of the second guide rail 203; the bottom of the Murphy's dropper 3 is a sloped structure, and an exhaust pipe 302 is provided at the bottom of the Murphy's dropper 3; a through-tube base 303 is fixedly connected to the bottom of the exhaust pipe 302 and the inner side of the Murphy's dropper 3; a radial through hole is provided inside the through-tube base 303, and the bottom edge of the through hole is lower than the Murphy's dropper 3. The lowest height of the bottom slope of the Fei's dropper 3; the right side of the adjusting wheel 4 is fixedly connected to a card wheel 404, and a fixing groove is provided on the right side of the card wheel 404, and a connecting tube 401 is fixedly provided on the left side of the adjusting wheel 4; a threaded groove is provided inside the connecting tube 401, and a connecting member 402 is connected to the inside of the connecting tube 401 by a thread; the left end of the connecting member 402 is integrally formed with a circular plate, and a cavity is provided inside the circular plate, and a spring plate 403 is clamped inside the cavity; the left end of the spring plate 403 is fixedly connected to a spring, and the left end of the spring is fixedly connected to the inside of the movable card tube 202; a clamping member 5 is clamped in the fixing groove on the right end face of the card wheel 404; a rod is fixedly connected to the clamping member 5, and a rubber wheel 501 is rotatably clamped at both ends of the rod; the rubber wheel 501 is clamped in the slide groove on the right side of the second guide rail 203.

[0039] Please refer to the attached drawings in the manual. Figure 1 and Figure 6 The connector 101 is clamped with a socket 102. The outer wall of the connector 101 is provided with two clamping rings. The inner wall of the socket 102 is provided with two annular grooves. When the connector 101 and the socket 102 are clamped, the clamping rings are clamped in the annular grooves. The end of the socket 102 is connected to an intravenous infusion needle 1021. The outer sleeve of the intravenous infusion needle 1021 is sleeved with a protective sleeve 10211. The top of the protective sleeve 10211 is provided with a through hole that is narrow at the top and wide at the bottom. When the medical staff prepares for infusion, they release the liquid medicine to flow into the intravenous infusion needle 1021. After the medicine flows out, since the top through hole of the protective sleeve 10211 is narrow at the top and wide at the bottom, the medicine will fill the inside of the protective sleeve 10211 and then flow out, so that the inside and outside of the intravenous infusion needle 1021 can be flushed, ensuring that there is no air inside the main body 1 and the intravenous infusion needle 1021, and it can also reduce some of the waste of medicine. The design of the clamping ring on the connecting head 101 can feel two pauses when assembling the intravenous infusion needle 1021, thereby ensuring that the connection is in place. When using a retention needle, the clamping ring can also increase the tightness of the connection with the retention needle interface.

[0040] Please refer to the attached drawings in the manual. Figure 2 、 Figure 3 and Figure 8 The top surface of the flow regulator 2 is engraved with an arrow pattern pointing to the left. The upper and lower plates of the flow regulator 2 are provided with circular holes. The interior of the circular hole is penetrated by the main body 1. The middle of the exhaust pipe 302 is a hollow structure and an annular plate is provided on the top. After the medicine drops to the annular plate, it is hit by a larger area, thereby avoiding the generation of bubbles. The hollow structure in the middle of the exhaust pipe 302 can realize automatic exhaust. After adjusting the position of the flow regulator 2, according to the indication of the arrow pattern indicating to the left, the medical staff is prompted to turn the adjusting wheel 4 to the left before moving the position of the adjusting wheel 4. At the same time, for patients who do not understand the practicality of the infusion set and the regulator, it can better prevent patients from affecting the effect of the medicine due to private adjustment of the drip rate.

[0041] Please refer to the attached drawings in the manual. Figure 4 A slot is provided on the left side of the first guide rail 201 and between the two first guide rails 201. The circular plate with a protruding diameter on the left side of the movable clamping tube 202 is clamped inside the slot. When the position of the adjusting wheel 4 is moved, the movable clamping tube 202 is driven to move synchronously. The slot provides an axial limit for the movement of the circular plate. At the same time, the friction between the slot and the circular plate can be used to fix the position of the movable clamping tube 202, preventing the movable clamping tube 202 from moving without moving the adjusting wheel 4, and also providing a basic position for the spring plate 403.

[0042] Please refer to the attached drawings in the manual. Figure 3 、 Figure 9 and Figure 11 There are two second guide rails 203, and a toothed plate 1 is provided on the right side of the outer second guide rail 203, and a toothed plate 2 is provided on the outer side of the inner second guide rail 203, and the width of the toothed plate 2 is greater than the width of the toothed plate 1. The toothed plate is meshed with the clamping wheel 404, and the second guide rail 203 has the same inclination angle as the first guide rail 201, and both are three-stage inclination structures. After pushing the adjusting wheel 4, its position on the flow regulator 2 can be adjusted. When the adjusting wheel 4 is in the middle section of the guide rail, the inclination angle is smaller, and the adjustable drip rate range is smaller, thereby achieving fine adjustment of the flow rate. When the adjusting wheel 4 is in the lower section of the guide rail, the inclination angle is larger, so that quick closing can be achieved.

[0043] Please refer to the attached drawings in the manual. Figure 2 A dosing tube 301 is provided on the outer side of the top of the Murphy's dropper 3. The dosing tube 301 is connected to the tube end connected to the Murphy's dropper 3 by interference fit. After the dosing tube 301 is removed, a small dose of medicine can be added at the Murphy's dropper 3. The dosing tube 301 can also serve as an exhaust, eliminating the need for a traditional infusion set to be connected to an external hose for exhaust, reducing the use of consumables, lowering production costs, alleviating the burden of using medical equipment, and being more energy-saving and environmentally friendly.

[0044] Please refer to the attached drawings in the manual. Figure 6 The outer wall of the card wheel 404 is provided with teeth, and the number of teeth is the same as that of the outer wall of the adjusting wheel 4. The width of the card wheel 404 is the same as the width of the tooth plate 1. When the adjusting wheel 4 is moved to the left, the card wheel 404 is disengaged from the tooth plate 1, so that it can engage with the tooth plate 2 to realize rotation, change the squeezing force on the main body 1, and realize fine adjustment of the dripping rate. After pushing the adjusting wheel 4 back to the right, the card wheel 404 engages with the tooth plate 1 and the tooth plate 2 at the same time, and it can be self-locking.

[0045] Please refer to the attached drawings in the manual. Figure 10 The outer wall of the clamping fixture 5 is provided with teeth, and the number of teeth is the same as that of the teeth on the outer wall of the adjusting wheel 4. After the adjusting wheel 4 is toggled to the left, the clamping wheel 404 is disengaged from the tooth part of the clamping fixture 5, but the left end shaft portion of the clamping fixture 5 is still clamped in the clamping wheel 404. After moving the adjusting wheel 4, the clamping fixture 5 is driven to move synchronously, and the rubber wheel 501 moves in the slide groove on the second guide rail 203. The friction force between the rubber wheel 501 and the flow regulator 2 can support the position of the adjusting wheel 4 to remain fixed. After the adjustment is completed, the adjusting wheel 4 is pushed back to the right while pushing the clamping wheel 404 to move to the right. The fixing groove on the right side of the clamping wheel 404 cooperates with the tooth part of the clamping fixture 5 to achieve clamping, and the friction force between the rubber wheel 501 and the flow regulator 2 can keep the position of the clamping fixture 5 fixed, thereby achieving fixed clamping, and the position of the adjusting wheel 4 is fixed and will not change, ensuring that the dripping speed is determined to be the adjusted speed after the adjusting wheel 4 is adjusted.

[0046] The working principle of this embodiment is as follows: First, you need to assemble the infusion set. Snap the clamp on the connector 101 into the annular groove of the socket 102. When assembling the intravenous infusion needle 1021, you will feel two clicks to indicate that the connection is in place.

[0047] Then release the liquid medicine to flush the inside of the main body 1 until the liquid medicine flows out from the end of the intravenous infusion needle 1021. After the liquid medicine flows out, since the top through hole of the protective cover 10211 is narrow at the top and wide at the bottom, the liquid medicine will fill the inside of the protective cover 10211 and then flow out, ensuring that there is no air inside the main body 1 and the intravenous infusion needle 1021;

[0048] Then set the infusion speed. After the medical staff completes the insertion of the intravenous infusion needle 1021 into the blood vessel and fixes it with medical tape, they move the adjusting wheel 4 in the direction of the indicated arrow, and the clamping wheel 404 disengages from the tooth plate 1, so that it can engage with the tooth plate 2 to achieve rotation. When the adjusting wheel 4 is in the middle section of the guide rail, the inclination angle is smaller and the adjustable drip rate range is smaller, thereby achieving fine adjustment of the squeezing force of the main body 1 and fine adjustment of the drip rate. After the adjustment is completed, push back the adjusting wheel 4 until the clamping wheel 404 engages with the tooth plate 1 and the tooth plate 2 at the same time, and the fixing groove on the right side of the clamping wheel 404 cooperates with the tooth part of the clamping piece 5 to achieve clamping, and the friction between the rubber wheel 501 and the flow regulator 2 can keep the position of the clamping piece 5 fixed, thereby achieving fixed clamping, so that the adjusted drip rate is the determined speed.

Claims

1. An infusion device with fine speed regulation, comprising: The main body (1) is provided with a flow regulator (2), a Murphy's dropper (3) is fixedly connected to the main body (1), and a connector (101) is provided at the end of the main body (1); the main body (1) is characterized in that the inner wall of the flow regulator (2) is fixedly connected to a first guide rail (201) and a second guide rail (203), a movable clamping tube (202) is slidably connected to the first guide rail (201), and a clamping wheel of an adjusting wheel (4) is slidably connected to the second guide rail (203). (404); a slide groove is provided on the right end face of the second guide rail (203); the second guide rail (203) and the first guide rail (201) have the same inclination angle, and both are three-stage inclination structures; the bottom of the Murphy's dropper (3) is a slope structure, and an exhaust pipe (302) is provided at the bottom of the Murphy's dropper (3); a through-tube base (303) is fixedly connected to the bottom of the exhaust pipe (302) and the inner side of the Murphy's dropper (3); the interior of the through-tube base (303) is provided with a A radial through hole, the bottom edge of the through hole is lower than the lowest height of the bottom slope of the Murphy's dropper (3); the right side of the regulating wheel (4) is fixedly connected to a clamping wheel (404), the right side of the clamping wheel (404) is provided with a clamping groove, and the left side of the regulating wheel (4) is fixedly provided with a connecting pipe (401); the interior of the connecting pipe (401) is provided with a threaded groove, and the interior of the connecting pipe (401) is connected to a connecting piece (402) through a thread; the left end of the connecting piece (402) is integrally formed with a circular plate A cavity is provided inside the circular plate, and a spring plate (403) is clamped inside the cavity; the left end of the spring plate (403) is fixedly connected to a spring, and the left end of the spring is fixedly connected to the inside of the movable clamping tube (202); a clamping member (5) is clamped in the clamping groove on the right end face of the clamping wheel (404); a rod is fixedly connected to the clamping member (5), and rubber wheels (501) are rotatably clamped at both ends of the rod; the rubber wheel (501) is clamped in the sliding groove on the right side of the second guide rail (203).

2. The infusion device with fine speed adjustment according to claim 1, characterized in that: The connector (101) is clamped with a socket (102), the outer wall of the connector (101) is provided with two clamping rings, the inner wall of the socket (102) is provided with two annular grooves, when the connector (101) and the socket (102) are clamped, the clamping rings are clamped in the annular grooves, the end of the socket (102) is connected to an intravenous infusion needle (1021), the outer surface of the intravenous infusion needle (1021) is sleeved with a protective sleeve (10211), and the top of the protective sleeve (10211) is provided with a through hole that is narrow at the top and wide at the bottom.

3. The infusion device with fine speed adjustment according to claim 2, characterized in that: The top surface of the flow regulator (2) is engraved with an arrow pattern pointing to the left. The upper and lower plates of the flow regulator (2) are provided with circular holes, the interior of which is penetrated by the main pipe (1). The middle of the exhaust pipe (302) is a hollow structure, and an annular plate is provided on the top.

4. The infusion device with fine speed adjustment according to claim 3, characterized in that: A notch is provided on the left side of the first guide rail (201) and between the two first guide rails (201), and a circular plate with a protruding diameter on the left side of the movable clamping tube (202) is clamped inside the notch.

5. The infusion device with fine speed regulation according to claim 4, characterized in that: Two second guide rails (203) are provided, a toothed plate 1 is provided on the right side of the outer second guide rail (203), and a toothed plate 2 is provided on the outer side surface of the inner second guide rail (203), and the width of the toothed plate 2 is greater than the width of the toothed plate 1, and the toothed plate is meshed with the clamping wheel (404).

6. The infusion device with fine speed adjustment according to claim 1, characterized in that: A dosing tube (301) is provided on the outer side of the top of the Murphy's dropper (3), and the dosing tube (301) is connected to the end of the tube connected to the Murphy's dropper (3) by interference fit.

7. The infusion device with fine speed adjustment according to claim 5, characterized in that: The outer wall of the clamping wheel (404) is provided with teeth, and the number of the teeth is the same as the number of the teeth on the outer wall of the regulating wheel (4). The width of the clamping wheel (404) is the same as the width of the tooth plate 1.

8. The infusion device with fine speed adjustment according to claim 7, characterized in that: The outer wall of the clamping piece (5) is provided with teeth, and the number of the teeth is the same as the number of the teeth on the outer wall of the regulating wheel (4).

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