Infusion flow adjusting device and infusion apparatus

Abstract

The utility model discloses an infusion flow regulating device, which relates to the technical field of medical instruments and is characterized in that two side walls of a shell are respectively fixed on one side edge of a bottom surface; guide grooves are formed in the two side walls respectively, and the two ends of a rotating shaft of the roller are embedded into the guide grooves respectively and can move along the guide grooves; the bottom surface is an inclined surface, and the distance between the bottom surface and the guide groove is gradually reduced from the large end to the small end; the limiting groove is formed in the middle of the bottom face of the shell in the width direction, the depth of the limiting groove is gradually reduced from the large end to the small end, the limiting groove can be used for clamping the infusion hose pipeline, and when the infusion flow is adjusted through the rolling wheel, the rolling wheel moves from the large end to the small end, the infusion hose pipeline is clamped into the limiting groove, and the infusion hose pipeline can be prevented from shaking left and right; an infusion hose pipeline can be effectively extruded, the adjusting precision is high, and the infusion flow can be accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically to an infusion flow regulating device and an infusion set. Background Technology

[0002] An infusion set flow regulator is a device used in ordinary infusion sets to control the flow rate of the medication. Ordinary infusion sets utilize gravity infusion, relying on the gravity generated by the height of the fluid to overcome tubing resistance and venous pressure, thereby pressurizing the medication into the veins and circulatory system.

[0003] The working principle of a flow regulator is that when the roller is manually pushed to compress the infusion tubing, the size of the fluid passage changes. According to fluid dynamics principles, the larger the fluid passage, the lower the resistance; conversely, the smaller the passage, the greater the resistance. After the fluid encounters this resistance, the weight of the fluid overcomes it to generate the driving force. The regulator adjusts the tubing resistance, thus changing the driving force. Lower resistance results in greater driving force and a faster flow rate; conversely, greater resistance results in less driving force and a slower flow rate.

[0004] In practice, to reduce the flow rate, push the roller on the regulator downwards (towards the smaller end) to compress the infusion tubing, reducing its cross-section and decreasing the flow rate. To increase the flow rate and accelerate the infusion, push the roller on the regulator upwards (towards the larger end) to release the pressure on the infusion tubing, allowing the tubing to return to its original position and increasing the flow rate.

[0005] Current flow regulators only achieve the required physical travel distance, but the actual effective travel distance is insufficient. Most of the time, they are merely "air conditioning" devices; the flow rate does not change with the actual travel distance. Only when the tubing is finally clamped does it receive a slight control, which is referred to as a "switch" rather than a regulator. This structure relies purely on the direction of compression, and the relationship between adjustment distance and flow rate is not linear. It cannot distribute the flow rate and adjustment distance more evenly. The real reason is that the roller groove forms surface contact with the compression surface of the infusion tubing. The infusion tubing moves left and right relative to the compression surface, failing to achieve effective compression. Only when the travel distance reaches a certain point does the tubing effectively compress until it is effectively shut off. Only in this process can effective flow regulation be achieved. Therefore, this tubing-compression-based regulation has too small an adjustable range and cannot meet the treatment requirements of high precision and precise flow control throughout the entire travel distance.

[0006] For those skilled in the art, how to more accurately adjust the flow rate of an infusion set is a technical problem that needs to be solved. Utility Model Content

[0007] The core of this utility model is to provide an infusion flow rate regulating device, which sets a limiting groove on the housing to effectively center and limit the tubing, ensuring effective compression of the tubing by the roller, thereby accurately regulating the flow rate of the infusion set. The specific solution is as follows:

[0008] An infusion flow rate regulating device includes a housing and rollers. The housing includes two side walls and a bottom surface, and the two side walls are respectively fixed to one side of the bottom surface.

[0009] Guide grooves are provided on the two side walls respectively. The roller includes a pressure roller and a rotating shaft. The two ends of the rotating shaft are respectively embedded in the guide grooves and can move along the guide grooves.

[0010] The bottom surface is an inclined surface, and the distance between the bottom surface and the guide groove gradually decreases from the large end to the small end;

[0011] The bottom surface has a centering groove in the width direction for inserting the infusion tubing, and the depth of the groove gradually decreases from the larger end to the smaller end.

[0012] Optionally, the width of the limiting groove gradually decreases from the larger end to the smaller end.

[0013] Optionally, the cross-sectional shape of the limiting groove is triangular.

[0014] Optionally, the length of the limiting groove does not exceed 2 / 3 of the length of the housing.

[0015] Optionally, the outer peripheral surface of the pressure roller is provided with alternating grooves.

[0016] Optionally, the external dimensions of the pressure roller are equal at all points along the axial direction.

[0017] Optionally, the outer peripheral surface of the pressure roller is provided with a positioning groove centered in the width direction.

[0018] Optionally, the outer diameter of the pressure roller is set to gradually change from small in the middle to large on both sides in the width direction.

[0019] Optionally, the large end of the bottom surface is provided with a flared ramp, the slope of which is greater than the slope of the bottom surface.

[0020] This utility model also provides an infusion set, including the infusion flow regulating device described in any of the above claims.

[0021] Compared to existing technologies, this utility model provides an infusion flow rate regulating device. Two side walls of the housing are respectively fixed to one side of the bottom surface. Guide grooves are provided on each of the two side walls, and the two ends of the roller's shaft are embedded in the guide grooves, allowing it to move along them. The bottom surface is inclined, and the distance between the bottom surface and the guide groove gradually decreases from the larger end to the smaller end. A limiting groove is provided in the center of the bottom surface of the housing in the width direction, and the depth of the limiting groove gradually decreases from the larger end to the smaller end. The limiting groove allows the infusion tubing to be inserted. When the infusion flow rate is adjusted by the roller, the roller moves from the larger end to the smaller end, and the infusion tubing is inserted into the limiting groove, preventing the infusion tubing from swaying left and right and effectively squeezing the infusion tubing. This provides high adjustment accuracy and precise flow rate control. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 An isometric view of a specific embodiment of the infusion flow regulating device provided by this utility model;

[0024] Figure 2 A top view of a specific embodiment of the infusion flow regulating device provided by this utility model;

[0025] Figure 3 for Figure 2 Cross-sectional diagram along the AA direction;

[0026] Figure 4 This is an axonometric view of the shell from a first-person perspective.

[0027] Figure 5 This is an axonometric view of the shell from a second perspective.

[0028] Figure 6 This is a schematic diagram of a first embodiment of the roller;

[0029] Figure 7 This is a schematic diagram of a second embodiment of the roller;

[0030] Figure 8 This is a schematic diagram of a third embodiment of the roller.

[0031] The image includes:

[0032] 1. Housing, 11. Side wall, 111. Guide groove, 12. Bottom surface, 121. Limiting groove, 122. Flared ramp, 2. Roller, 21. Pressure roller, 211. Positioning tooth groove, 22. Rotating shaft. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the infusion flow regulating device and infusion set of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Combination Figure 1 , Figure 2 As shown, this utility model provides an infusion flow rate regulating device, including a housing 1 and a roller 2. The housing 1 includes two side walls 11 and a bottom surface 12. The two side walls 11 are respectively fixed to one side of the bottom surface 12, forming a three-sided enclosed "U" shaped structure. The two side walls 11 are approximately parallel and perpendicular to the bottom surface 12.

[0035] Guide grooves 111 are respectively provided on the two side walls 11, with the openings of the two guide grooves 111 facing each other, and the length direction of the guide grooves 111 extending in the same direction as the length direction of the side walls 11. Figure 6 , Figure 7 , Figure 8 As shown, the roller 2 includes a pressure roller 21 and a rotating shaft 22. The diameter of the pressure roller 21 is larger than the diameter of the rotating shaft 22. The two ends of the rotating shaft 22 protrude outward from the two side walls of the pressure roller 21, respectively. The rotating shaft 22 is cylindrical, and each end of the rotating shaft 22 is respectively engaged with a guide groove 111. The rotating shaft 22 can translate along the guide groove 111 and can also rotate relative to the guide groove 111. The guide groove 111 has an open end at the larger end of the housing 1 and a closed end at the smaller end of the housing 1. The roller 2 can enter from the open end of the guide groove 111 and can move up to the closed end of the guide groove 111.

[0036] When the rotating shaft 22 moves along the guide groove 111, the roller 2 reaches different positions along the length of the housing 1. When the infusion tubing passes through the housing 1, the infusion tubing passes from the large end to the small end of the housing 1, the outer surface of the pressure roller 21 contacts the infusion tubing, and the pressure roller 21 and the bottom surface 12 of the housing 1 work together to squeeze the infusion tubing; when the roller 2 rotates relative to the housing 1, it can move relative to the housing 1.

[0037] The bottom surface 12 is an inclined surface, and the distance between the bottom surface 12 and the guide groove 111 is not completely equal; the distance between the bottom surface 12 and the guide groove 111 gradually decreases from the larger end to the smaller end. Figure 3 As shown, the right end of the housing 1 is the large end, the left end is the small end, and the distance L between the bottom surface 12 and the right end of the guide groove 111 is greater than the distance l between the bottom surface 12 and the left end of the guide groove 111.

[0038] Combination Figure 2As shown, a limiting groove 121 is centrally located on the bottom surface 12 in the width direction. The limiting groove 121 is a recessed groove on the bottom surface 12, with the recessed direction facing away from the side wall 11. The limiting groove 121 is used to allow the infusion tubing to be inserted, and the depth of the limiting groove 121 gradually decreases from the larger end to the smaller end, that is, the depth of the limiting groove 121 at the larger end of the housing 1 is greater than the depth at the smaller end of the housing 1. The limiting groove 121 provides lateral limiting for the infusion tubing, keeping the infusion tubing in a central position in the width direction. When the roller 2 moves from the larger end to the smaller end of the housing 1, the squeezing force of the roller 2 on the infusion tubing gradually increases, and the flow rate of the infusion tubing gradually decreases.

[0039] The infusion flow regulating device of this utility model has a limiting groove 121 with sufficient depth, which can effectively center and limit the infusion tubing in the width direction, ensuring that the roller 2 effectively squeezes the infusion tubing and the infusion tubing will not sway left and right (in the width direction) within the housing 1, thus ensuring that the roller 2 effectively squeezes the infusion tubing.

[0040] Based on the above scheme, the width of the limiting groove 121 of this utility model gradually decreases from the large end to the small end, combined with Figure 2 The limiting groove 121 has a wider right end and a narrower left end, with the width gradually decreasing from right to left. This means the depth and width of the limiting groove 121 also gradually decrease from the wider end to the narrower end. The maximum width of the limiting groove 121 is approximately equal to the width of the bottom surface 12, ensuring that the infusion tubing smoothly enters the limiting groove 121 from its widest point. As the width and depth of the limiting groove 121 decrease towards the narrower end, the compression on the infusion tubing increases accordingly, thereby reducing the fluid flow rate.

[0041] Combination Figure 4 , Figure 5 As shown, the limiting groove 121 in this invention has a triangular cross-sectional shape, and the surface forming the limiting groove 121 consists of two planes forming an included angle. The limiting groove 121 causes the bottom surface 12 to form an outwardly convex structure, and the outer bottom surface of the bottom surface 12 has a raised triangular shape, which makes it easier to grasp during clinical operation.

[0042] Combination Figure 2 , Figure 3As shown, the length of the limiting groove 121 does not exceed 2 / 3 of the length of the housing 1. Typically, the length of the limiting groove 121 is between 1 / 2 and 2 / 3 of the total length of the housing 1. The length of the limiting groove 121 should be shorter than the length of the guide groove 111. When the roller 2 begins to squeeze the infusion tubing, it is pressed into the limiting groove 121. As the roller 2 moves towards the smaller end of the housing 1, the degree of squeezing the infusion tubing increases, thereby reducing the fluid flow rate. When the roller 2 moves to the end of the guide groove 111, it exceeds the range of the limiting groove 121. The roller 2 and the bottom surface 12 cooperate to squeeze the infusion tubing. At this time, the infusion tubing is squeezed to a greater extent, and the possibility of lateral displacement is small. Since there is no recessed portion of the limiting groove 121, the roller 2 can squeeze the infusion tubing to a greater extent.

[0043] Combination Figure 6 As shown, the outer peripheral surface of the pressure roller 21 of this invention is provided with alternating concave and convex grooves. The outer surface of the pressure roller 21 can be moved by fingers, increasing the friction with the fingers. The grooves on the outer peripheral surface of the pressure roller 21 can increase the friction with the infusion tubing, preventing the infusion tubing from slipping.

[0044] Combination Figure 6 As shown, in one embodiment, the pressure roller 21 is cylindrical. The cylinder referred to here does not require a smooth outer surface, but rather that the external dimensions of the pressure roller 21 are equal at all points along the axial direction.

[0045] Combination Figure 7 As shown, a positioning groove 211 is provided in the center of the outer peripheral surface of the pressure roller 21 in the width direction. The positioning groove 211 is a circumferential groove provided on the outer surface of the pressure roller 21. The positioning groove 211 can match the infusion tubing. The infusion tubing is directly opposite the center of the pressure roller 21, further ensuring that the infusion tubing does not shift to the left or right.

[0046] Combination Figure 8 As shown, the outer diameter of the pressure roller 21 is gradually set in the width direction with a smaller diameter in the middle and a larger diameter at both ends. The outer diameter of the pressure roller 21 is not completely equal. Along the axis of rotation, the diameter of the pressure roller 21 is distributed with a smaller diameter in the middle and a larger diameter at both ends. Through the change in the outer diameter of the pressure roller 21, the infusion tubing is aligned with the center of the pressure roller 21, further ensuring that the infusion tubing does not shift to the left or right.

[0047] Combination Figure 3 , Figure 5 As shown, this utility model has a flared ramp 122 at the large end of the bottom surface 12, and the slope of the flared ramp 122 is greater than the slope of the bottom surface 12, such as... Figure 2 The angle between the flared ramp 122 and the horizontal plane is greater than the angle between the bottom surface 12 and the horizontal plane, making the large end opening of the housing 1 larger, which facilitates the insertion of the roller 2 and the infusion tubing.

[0048] This utility model also provides an infusion set, including the above-mentioned infusion flow regulating device, which can achieve the aforementioned technical effects.

[0049] The inner bottom surface 12 of the regulator housing is provided with a triangular recessed limiting groove 121. The limiting groove 121 has sufficient depth, and the side of the limiting groove 121 can effectively center and limit the infusion tubing, ensuring that the roller 2 effectively squeezes the infusion tubing, thereby ensuring precise control of the infusion set flow. Viewed from the front, the width of the limiting groove 121 gradually narrows from the larger end to the smaller end, and viewed from the side, the depth of the limiting groove 121 gradually becomes shallower from the larger end to the smaller end.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An infusion flow regulating device, characterized by, The device comprises a shell (1) and a roller (2), the shell (1) comprises two side walls (11) and a bottom surface (12), the two side walls (11) are fixed to one side of the bottom surface (12) respectively; Two guide grooves (111) are arranged on the two side walls (11) respectively, the roller (2) comprises a pressing wheel (21) and a rotating shaft (22), the two ends of the rotating shaft (22) are embedded in the guide grooves (111) respectively and can move along the guide grooves (111); The bottom surface (12) is an inclined surface, the distance between the bottom surface (12) and the guide grooves (111) gradually decreases from the large end to the small end; A limiting groove (121) is arranged in the middle of the bottom surface (12) in the width direction, for clamping the infusion hose, the depth of the limiting groove (121) gradually decreases from the large end to the small end.

2. The infusion flow regulating device of claim 1, wherein, The width of the limiting groove (121) gradually decreases from the large end to the small end.

3. The infusion flow regulator of claim 2, wherein, The cross-sectional shape of the limiting groove (121) is triangular.

4. The infusion flow regulator of claim 2, wherein, The length of the limiting groove (121) is not more than 2 / 3 of the length of the shell (1).

5. The infusion flow regulator of claim 1, wherein, The outer surface of the pressing wheel (21) is provided with a tooth groove with alternating concave and convex structures.

6. The infusion flow regulator of claim 5, wherein, The outer dimensions of the pressing wheel (21) are equal in all directions along the axial direction.

7. The infusion flow regulator of claim 6, wherein, A positioning tooth groove (211) is arranged in the middle of the outer surface of the pressing wheel (21) in the width direction.

8. The infusion flow regulator of claim 5, wherein, The outer diameter of the pressing wheel (21) gradually changes in the width direction, being smaller in the middle and larger on both sides.

9. The infusion flow regulator of claim 1, wherein, The large end of the bottom surface (12) is provided with an expanded slope (122), and the slope of the expanded slope (122) is greater than the slope of the bottom surface (12).

10. An infusion set, characterized in that The device comprises the infusion flow regulating device of any one of claims 1 to 9.

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