A precision infusion set with adjustable flow rate
By combining the design of the limiting rod and the limiting hole, along with rounded corners, inclined surfaces, and anti-slip strips, the problem of preventing accidental contact in precision infusion sets is solved, ensuring the accuracy and safety of flow regulation and improving the safety and efficiency of infusion set use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING TECH & BUSINESS SCHOOL
- Filing Date
- 2025-07-30
- Publication Date
- 2026-08-04
AI Technical Summary
Existing precision infusion sets lack anti-accidental touch functions, resulting in unstable flow regulation, which may cause the dosage to deviate from the doctor's order, affecting the efficacy or causing drug overdose.
It adopts a limit rod and limit hole to prevent accidental touch design, combined with rounded corners, inclined surfaces and anti-slip strips to enhance grip stability, and a spring reset mechanism to ensure the accuracy of flow adjustment. It is equipped with a transparent observation window and color-coded stickers for easy and intuitive judgment of the locking status.
It achieves precise and reliable flow regulation, improves infusion safety and user experience, reduces the risk of operational misjudgment, and improves clinical operation efficiency.
Smart Images
Figure CN224585134U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of infusion sets, and more particularly to a precision infusion set with adjustable flow rate. Background Technology
[0002] A precision infusion set is a medical device designed for high-precision and high-safety infusion. It is often used in scenarios where drug dosage and flow rate are strictly required, such as chemotherapy, anesthesia, pediatrics, ICU, and nutritional therapy. It can precisely adjust the flow rate and dosage to avoid excessive or insufficient medication.
[0003] Existing precision infusion sets use precision flow regulators to achieve precise adjustment. The precision flow regulator adopts a rotary adjustment method. Because the rotary structure can achieve continuous and linear flow fine adjustment through the fluid flow channel with a gradually changing cross section set between the coaxial upper and lower adjustment plates, it provides higher adjustment accuracy and stability. At the same time, the rotary method, together with the scale and indicator, can intuitively display the flow value, which is convenient for medical staff to set and verify accurately.
[0004] In existing technologies, precision flow regulators adjust flow by rotation, but lack anti-accidental touch function. Once accidentally touched by a collision, the set flow rate will change instantly. In mild cases, this may cause the dosage to deviate from the doctor's order, resulting in reduced efficacy or fluctuations in blood drug concentration. In severe cases, a sudden increase in flow rate may cause drug overdose, a sudden increase in circulatory load, and reduce infusion safety. Therefore, a precision infusion set with adjustable flow rate is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a precision infusion set with adjustable flow rate, which aims to improve the problem that the existing precision infusion sets with adjustable flow rate lack anti-accidental contact function, thus reducing the safety of infusion.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a precision infusion set with adjustable flow rate, comprising a stopper puncturer, an infusion tube fixedly connected to the bottom end of the stopper puncturer, a precision flow regulator provided at the bottom end of the infusion tube, the precision flow regulator comprising an upper cover, a lower cover rotatably connected to the bottom of the upper cover, a dropper fixedly connected to the bottom end of the precision flow regulator via the infusion tube, a fixing sleeve fixedly connected to the outer wall of the infusion tube, an I-shaped groove formed on the inner wall of the fixing sleeve, an I-shaped block slidably connected inside the I-shaped groove, a limiting ring fixedly connected to the outer wall of the I-shaped block, a through groove formed on the outer wall of the fixing sleeve, a connecting block fixedly connected to the circumferential surface of the limiting ring, a rubber block fixedly connected to the outer wall of the connecting block, a blocking block fixedly connected to the inner wall of the through groove, a spring fixedly connected to the top of the limiting ring, a limiting rod fixedly connected to the bottom of the limiting ring, a limiting hole formed on the top of the upper cover, and an anti-accidental contact auxiliary component provided on the outer wall of the fixing sleeve.
[0007] As a further description of the above technical solution: The fixing sleeve is fitted onto the outer wall of the limiting ring, and the top end of the spring is fixedly connected to the inner wall of the fixing sleeve.
[0008] As a further description of the above technical solution: The through groove is sleeved on the outer wall of the connecting block, and the outer wall of the limiting rod is adapted to the inner wall of the limiting hole.
[0009] As a further description of the above technical solution: The anti-accidental touch auxiliary component includes rounded corners, and the top outer wall of the rubber block and the bottom outer wall of the blocking block are both provided with inclined surfaces. The outer wall of the connecting block is fixedly connected with an anti-slip strip.
[0010] As a further description of the above technical solution: The rounded corners are respectively formed on the top of the rubber block and the bottom outer wall of the blocking block.
[0011] As a further description of the above technical solution: A silicone pad is fixedly connected to the bottom end of the limiting rod, an installation hole is opened on the outer wall of the fixing sleeve, a transparent plate is fixedly connected to the inner wall of the installation hole, and a color identification sticker is fixedly connected to the outer wall of the limiting ring.
[0012] As a further description of the above technical solution: The silicone pad is semi-elliptical in shape and its diameter is smaller than that of the limiting rod.
[0013] As a further description of the above technical solution: The color-coded stickers are on the same horizontal line as the transparent plate.
[0014] This utility model has the following beneficial effects: 1. In this utility model, the limiting rod and the limiting hole cooperate to achieve anti-accidental touch locking, preventing unexpected changes in flow. The rounded corners and inclined surface design make the downward resistance greater than the upward resistance, which facilitates the unlocking operation and avoids accidental touch. The anti-slip strip enhances the grip stability. Combined with the spring reset mechanism, it ensures accurate and reliable flow regulation, improves infusion safety and user experience, and ultimately achieves a highly efficient protection effect.
[0015] 2. In this utility model, by adding a silicone pad to buffer the impact of the limiting position, the semi-elliptical design facilitates precise insertion into the limiting hole, and the transparent observation window is linked with the color marking sticker on the limiting ring, so that medical staff can intuitively judge the locking status through the color marking without operation, which greatly reduces the risk of operation misjudgment, improves the safety of flow regulation and clinical operation efficiency, and further strengthens the effect of preventing accidental touch. Attached Figure Description
[0016] Figure 1 This is a side view of the main structure of a precision infusion set with adjustable flow rate proposed in this utility model. Figure 2 This is a schematic diagram showing the separation of the fixing sleeve and the infusion tube of a precision infusion set with adjustable flow rate proposed in this utility model; Figure 3 This is a partial cross-sectional exploded bottom view of the adjustable flow rate precision infusion set proposed in this utility model. Figure 4 This is a partial cross-sectional exploded view of the adjustable flow rate precision infusion set proposed in this utility model. Figure 5 This invention proposes a precision infusion set with adjustable flow rate. Figure 4 Enlarged schematic diagram of region A in the middle.
[0017] Legend: 1. Bottle stopper puncturer; 2. Infusion tubing; 3. Precision flow regulator; 31. Top cap; 32. Bottom cap; 4. Dropper; 5. Fixing sleeve; 6. I-beam groove; 7. I-beam block; 8. Limiting ring; 9. Through groove; 10. Connecting block; 11. Rubber block; 12. Blocking block; 13. Rounded corner; 14. Inclined surface; 15. Spring; 16. Limiting rod; 17. Limiting hole; 18. Anti-slip strip; 19. Silicone pad; 20. Mounting hole; 21. Transparent plate; 22. Color identification sticker. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Reference Figures 1-3 This utility model provides an embodiment of a precision infusion set with adjustable flow rate, including a bottle stopper puncturer 1 for puncturing the silicone stopper of an IV drip bottle. An infusion tube 2 is fixedly connected to the bottom end of the bottle stopper puncturer 1. An intravenous needle (not shown) is located at the lowest end of the infusion tube 2 for intravenous injection. A precision flow regulator 3 is located at the bottom end of the infusion tube 2. The precision flow regulator 3 includes an upper cover 31, and a lower cover 32 is rotatably connected to the bottom of the upper cover 31. The precision flow regulator 3 is similar to the Chinese patent with authorization publication number CN206045069U (A Nutritional Set with Precisely Adjustable Flow Rate). The principle of the precision flow regulator mentioned in the infusion set is similar, and the effect is the same. It is a publicly available technology in this field, and will not be elaborated here. Precise flow regulation is achieved by rotating the top cover 31. The bottom of the precision flow regulator 3 is also fixedly connected to the dropper 4 through the infusion tube 2. The outer wall of the infusion tube 2 is fixedly connected to the fixing sleeve 5. The inner wall of the fixing sleeve 5 has an I-shaped groove 6. The I-shaped block 7 is slidably connected inside the I-shaped groove 6. There are two sets of I-shaped grooves 6 and I-shaped blocks 7, which are mirror images of each other on the inner surface of the fixing sleeve 5 and the outer wall of the limiting ring 8, respectively. The outer wall of the I-shaped block 7 is fixedly connected to... A limiting ring 8 is connected to a fixing sleeve 5, which is fitted onto the outer wall of the limiting ring 8. A through groove 9 is formed on the outer wall of the fixing sleeve 5. A connecting block 10 is fixedly connected to the circumferential surface of the limiting ring 8. The through groove 9 is fitted onto the outer wall of the connecting block 10. Two sets of rubber blocks 11 are arranged in a mirror image on both sides of the connecting block 10, engaging with several sets of equidistantly distributed blocking blocks 12. Blocking blocks 12 are fixedly connected to the inner wall of the through groove 9. A spring 15 is fixedly connected to the top of the limiting ring 8, with the top end of the spring 15 fixedly connected to the inner wall of the fixing sleeve 5. The bottom of the limiting ring 8 is fixedly connected to the connecting sleeve 5. A limiting rod 16 is fixedly connected, and a limiting hole 17 is opened on the top of the cover 31. The outer wall of the limiting rod 16 is adapted to the inner wall of the limiting hole 17. Several sets of limiting holes 17 are opened and are equidistantly distributed at the center point of the cover 31. The distance between adjacent limiting holes 17 is equal to the minimum unit angle of flow regulation. When the cover 31 is rotated to the target flow rate, the limiting hole 17 is vertically aligned with the limiting rod 16. After the limiting rod 16 moves down, it is inserted into the hole to prevent the cover 31 from rotating. By moving the limiting ring 8 down, the two sets of limiting rods 16 are inserted into the corresponding limiting holes 17 to realize the anti-accidental touch function of the precision flow regulator 3.
[0020] Reference Figures 3-5 The outer wall of the fixed sleeve 5 is provided with an anti-accidental contact auxiliary component, which includes rounded corners 13, inclined surfaces 14, and anti-slip strips 18. The rounded corners 13 are respectively opened on the top of the rubber block 11 and the bottom of the blocking block 12. The top outer wall of the rubber block 11 and the bottom outer wall of the blocking block 12 are both provided with inclined surfaces 14. Due to the setting of the rounded corners 13 and inclined surfaces 14, when the connecting block 10 drives the limiting ring 8 to rise and fall inside the fixed sleeve 5, the blocking block 12 contacts the rubber block 11, making the downward resistance greater than the upward resistance. The angle of the inclined surface 14 of the rubber block 11 is 60°, and the angle of the inclined surface 14 of the blocking block 12 is 30°. When pressed down, the rubber block 11 squeezes the blocking block 12 at a larger angle, generating greater resistance. When pushed up, the rubber block 11 slides off at a smaller angle, and the resistance is significantly reduced, thereby achieving that the downward resistance is greater than the upward resistance. The outer wall of the connecting block 10 is fixedly connected with anti-slip strips 18.
[0021] Reference Figures 3-4 A silicone pad 19 is fixedly connected to the bottom end of the limiting rod 16. The silicone pad 19 is semi-elliptical in shape and its diameter is smaller than that of the limiting rod 16. However, due to its elastic deformation characteristics, it expands and fills the gap after being inserted into the limiting hole 17, thereby enhancing the friction locking effect. The outer wall of the fixing sleeve 5 is provided with an installation hole 20. A transparent plate 21 is fixedly connected to the inner wall of the installation hole 20. There are two sets of installation holes 20 and transparent plates 21, which are located next to the through groove 9 and are arranged vertically. When the limiting ring 8 moves down and up to release the limit or to perform the limit, the visibility of the transparent plate 21 allows medical staff to intuitively see whether the current state is in the limit state through the color identification sticker 22. A color identification sticker 22 is fixedly connected to the outer wall of the limiting ring 8. The color identification sticker 22 and the transparent plate 21 are on the same horizontal line. The color identification sticker 22 can be set to a bright red.
[0022] Working principle: The bottle stopper puncturer 1 punctures the silicone stopper of the infusion bottle, and the medication flows through the infusion tube 2 to the intravenous needle. Flow rate adjustment is achieved by rotating the upper cover 31 of the precision flow regulator 3. When the flow rate needs to be locked, the connecting block 10 is pressed down, overcoming the resistance of the spring 15 and the downward resistance formed by the rounded corner 13 and inclined surface 14 between the rubber block 11 and the blocking block 12. This drives the limiting ring 8 to move the limiting rod 16 down and insert it into the corresponding limiting hole 17. At this time, the silicone pad 19 enhances the frictional locking between the limiting rod 16 and the limiting hole 17, completely restricting the rotation of the upper cover 31. During the pressing process, the connecting block 10 moves down along the through groove 9, and the rubber block 11... The ring slides over the blocking block 12 and relies on elastic reset to form a locking engagement, preventing the limit ring 8 from accidentally springing up. The I-beam block 7 slides along the I-beam groove 6 to ensure the vertical movement of the limit ring 8. Medical staff can observe the position of the color-coded sticker 22 on the limit ring 8 through the transparent plate 21. Moving it up reveals the unlocked state, and moving it down reveals the locked state. The anti-slip strip 18 facilitates the operation of raising and lowering the connecting block 10. When the lock is released, push the connecting block 10 up, and the inclined surface 14 allows the rubber block 11 to easily slide off the blocking block 12. The spring 15 resets and drives the limit rod 16 to disengage from the limit hole 17. At this time, the top cover 31 can be rotated freely to adjust the flow rate.
[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A precision infusion set with adjustable flow rate, comprising a bottle stopper puncturer (1), wherein an infusion tube (2) is fixedly connected to the bottom end of the bottle stopper puncturer (1), and a precision flow regulator (3) is provided at the bottom end of the infusion tube (2). The precision flow regulator (3) includes an upper cover (31), and a lower cover (32) is rotatably connected to the bottom of the upper cover (31). A dropper (4) is also fixedly connected to the bottom end of the precision flow regulator (3) via the infusion tube (2). The set is characterized in that: The outer wall of the infusion tube (2) is fixedly connected to a fixing sleeve (5), the inner wall of the fixing sleeve (5) is provided with an I-shaped groove (6), the inside of the I-shaped groove (6) is slidably connected to an I-shaped block (7), the outer wall of the I-shaped block (7) is fixedly connected to a limiting ring (8), the outer wall of the fixing sleeve (5) is provided with a through groove (9), the circumferential surface of the limiting ring (8) is fixedly connected to a connecting block (10), the outer wall of the connecting block (10) is fixedly connected to a rubber block (11), the inner wall of the through groove (9) is fixedly connected to a blocking block (12), the top of the limiting ring (8) is fixedly connected to a spring (15), the bottom of the limiting ring (8) is fixedly connected to a limiting rod (16), the top of the cover (31) is provided with a limiting hole (17), and the outer wall of the fixing sleeve (5) is provided with an anti-accidental contact auxiliary component.
2. The precision infusion set with adjustable flow rate according to claim 1, characterized in that: The fixing sleeve (5) is fitted on the outer wall of the limiting ring (8), and the top end of the spring (15) is fixedly connected to the inner wall of the fixing sleeve (5).
3. The precision infusion set with adjustable flow rate according to claim 1, characterized in that: The through groove (9) is fitted on the outer wall of the connecting block (10), and the outer wall of the limiting rod (16) is adapted to the inner wall of the limiting hole (17).
4. The precision infusion set with adjustable flow rate according to claim 1, characterized in that: The anti-accidental touch auxiliary component includes rounded corners (13), the top outer wall of the rubber block (11) and the bottom outer wall of the blocking block (12) are both provided with inclined surfaces (14), and the outer wall of the connecting block (10) is fixedly connected with an anti-slip strip (18).
5. A precision infusion set with adjustable flow rate according to claim 4, characterized in that: The rounded corners (13) are respectively opened on the top of the rubber block (11) and the bottom outer wall of the blocking block (12).
6. The precision infusion set with adjustable flow rate according to claim 1, characterized in that: The bottom end of the limiting rod (16) is fixedly connected to a silicone pad (19), the outer wall of the fixing sleeve (5) is provided with an installation hole (20), the inner wall of the installation hole (20) is fixedly connected to a transparent plate (21), and the outer wall of the limiting ring (8) is fixedly connected to a color identification sticker (22).
7. A precision infusion set with adjustable flow rate according to claim 6, characterized in that: The silicone pad (19) is semi-elliptical in shape and its diameter is smaller than that of the limiting rod (16).
8. A precision infusion set with adjustable flow rate according to claim 6, characterized in that: The color-coded sticker (22) and the transparent plate (21) are on the same horizontal line.