Locking puncture connector and infusion set without glue and chemical solvent

Abstract

The present invention relates to a puncture-locking connector (10) and a glue-free and solvent-free infusion set. The puncture-locking connector comprises: a conical puncture tip (11), the conical puncture tip having a puncture bevel (111); a limiting plate (14), the limiting plate having a puncture end (141) and a grasping end arranged oppositely; a grasping section (12), the grasping section (12) having a square main body, one end of the square main body being arranged perpendicular to the limiting plate (14); a connecting tube (13), one end of the connecting tube being fixedly arranged on the other end of the square main body, the other end of the connecting tube being provided with a discharge port, the discharge port being in communication with the puncture bevel (111). Figure 1

Description

Title of the invention: Locking perforation fitting and infusion assembly without glue and chemical solvents. Technical field

[0001] The present application relates to the technical field of medical devices, and more particularly to a piercing locking fitting and an infusion set without glue and without chemical solvent. Technical context

[0002] Currently, the body of the puncture device in a perfusion tube assembly is generally provided with a puncture tip and a gripping part.

[0003] However, the gripping part of existing puncture devices is most often a cylindrical structure, resulting in a potentially unstable and slippery grip for the healthcare professional. When the grip is unstable, the puncture tip can accidentally pierce the skin, posing a safety risk to the healthcare professional when using the puncture device.

[0004] Consequently, the prior art has defects and disadvantages and must be improved and developed. Disclosure of the invention

[0005] In order to resolve the disadvantages of the prior art, the present invention aims to provide a locking puncture fitting and a perfusion assembly without glue and without chemical solvent, in order to solve the problem of the prior art puncture device, which is likely to be unstable in its hold, which poses a risk to the safety of the health professional.

[0006] To this end, the present invention provides the following technical solution: a locking pierce fitting for patient infusion, in which the locking pierce fitting has the following elements in one piece and arranged sequentially from top to bottom:

[0007] a conical puncture tip, the conical puncture tip having a puncture bevel;

[0008] a limiting plate, the limiting plate having a puncture end and a gripping end arranged in opposite ways, the conical puncture tip being arranged perpendicularly on the puncture end, and the limiting plate being designed to limit the movement of the conical puncture tip;

[0009] a gripping part, the gripping part having a square main body, one end of the square main body being disposed perpendicular to the limiting plate;

[0010] a connecting tube, one end of the connecting tube being fixedly disposed on the other end of the main square body, the other end of the connecting tube being provided with a discharge orifice, the discharge orifice being in communication with the puncture bevel.

[0011] Optionally, the main square body has a first end face and a second end face arranged oppositely, a first gripping plate and a second gripping plate are arranged at the corners of the first end face, and a third gripping plate and a fourth gripping plate are arranged at the corners of the second end face;

[0012] in which the first, second, third and fourth gripping plates are all arranged perpendicular to the limiting plate.

[0013] Optionally, a first C-shaped groove is disposed between the first gripping plate and the second gripping plate, a second C-shaped groove is disposed between the third gripping plate and the fourth gripping plate, a third C-shaped groove is disposed between the first gripping plate and the third gripping plate, and a fourth C-shaped groove is disposed between the second gripping plate and the fourth gripping plate.

[0014] Optionally, the third C-shaped groove is provided with an inlet tube, the inlet tube being provided in communication with the discharge orifice and the puncture bevel.

[0015] Optionally, a number of reinforcements are respectively provided in the third C-shaped groove and the fourth C-shaped groove.

[0016] Optionally, a number of reinforcements may be provided in the form of cylindrical, ribbed or spacer plates.

[0017] In order to solve the technical problem, the present invention adopts the following alternative technical solution: a glue-free and solvent-free infusion set, comprising:

[0018] a piercing locking fitting as described above, the connecting tube comprising a connecting tube body, a fixing plate and an inverted fixing element, the fixing plate being looped onto one side of the connecting tube body near the gripping part, and the inverted fixing element being looped onto one end of the connecting tube body opposite the gripping part;

[0019] an infusion tube, the infusion tube being removably connected to the locking puncture fitting;

[0020] a locking element, the locking element being provided with an outlet hole provided at one end of the locking element opposite the connecting tube, the outlet hole being designed for the outlet of the infusion tube;

[0021] wherein the locking element is designed to fix the infusion tube to the locking pierce fitting.

[0022] Optionally, the locking element is a swivel fitting, the swivel fitting being provided with a plurality of pivoting projections on an inner wall oriented towards the connecting tube;

[0023] wherein the fixing plate is provided with a plurality of locking projections supplied in one-to-one correspondence with the plurality of pivoting projections, the plurality of locking projections are provided with pivoting openings, the pivoting openings having dimensions adapted to the pivoting projections; an anti-loosening projection is disposed at the level of the entry of the pivoting openings, and the anti-loosening projection is designed to prevent the loosening of the pivoting projections stuck in the pivoting openings;

[0024] in which the infusion tube exits the outlet hole, the infusion tube is fitted into the connecting tube body, the swiveling projection is abutted against the fixing plate, and the rotation of the swivel fitting screws the plurality of swiveling projections into the swiveling openings.

[0025] Optionally, the locking element is a reverse loop fitting, the reverse loop fitting comprising a plurality of extruded fasteners, the plurality of extruded fasteners being fixedly arranged at one end of the reverse loop fitting opposite the outlet hole; the extruded fasteners include deformation parts and snap-on parts.

[0026] Optionally, the snap-on part is provided with a stop section, a lateral support section and a stop section, which are formed as a single unit;

[0027] in which the infusion tube exits the outlet hole, and the infusion tube is inserted into the connecting tube body, in order to move the reverse loop fitting towards the piercing locking fitting; the stop section comes against the fixing plate, and the deformation part deploys outwards, in order to cause the deformation part to bend; the lateral support section comes against a lateral wall of the fixing plate, in order to snap the stop section into the fixing plate.

[0028] Compared to the prior art, the present invention relates to a puncture-lock fitting and an infusion set without glue or chemical solvents. The puncture-lock fitting comprises a square main body through a gripping portion, one end of the square main body being disposed perpendicular to the limiting plate; one end of the connecting tube being fixedly positioned on the other end of the main square body, which, compared to the existing cylindrical gripping structure, increases friction during gripping, avoids slippage problems due to sweaty hands or poor hand positions of healthcare professionals, and thus ensures greater stability and safety during the operation; in addition, the other end of the connecting tube is provided with a discharge port, and the discharge port is in communication with the puncture bevel, which makes the flow of liquid smoother, improves the efficiency of the infusion, reduces the problem of gas stagnation and obstruction, and further ensures the smooth flow of the infusion. Descriptions of the figures

[0029] The [Fig.1] is a three-dimensional structural diagram of a piercing locking fitting according to the present application;

[0030] The [Fig.2] is another three-dimensional structural diagram of the piercing locking fitting according to the present application;

[0031] The [Fig.3] is another three-dimensional structural diagram of the piercing locking fitting according to the present application;

[0032] The [Fig.4] is another three-dimensional structural diagram of the piercing locking fitting according to the present application;

[0033] The [Fig.5] is another three-dimensional structural diagram of the piercing locking fitting according to the present application;

[0034] The [Fig.6] is an exploded three-dimensional structural diagram of a glue-free and chemical solvent-free perfusion assembly according to the present application;

[0035] The [Fig.7] is another exploded three-dimensional structural diagram of a glue-free and chemical solvent-free perfusion assembly according to the present application;

[0036] The [Fig.8] is another exploded three-dimensional structural diagram of a glue-free and chemical solvent-free perfusion assembly according to the present application;

[0037] Fig. 9 is another exploded three-dimensional structural diagram of a glue-free and chemical solvent-free perfusion assembly according to the present application. References

[0038] 10. Piercing locking fitting; 11. Conical piercing tip; 111. 12. Puncture bevel; 12. Gripping part; 121. Square main body; 1211. First end face; 1212. Second end face; 1213. First gripping plate; 1214. Second gripping plate; 1215. Third gripping plate; 1216. Fourth gripping plate; 1217. First C-shaped groove; 1218. Second C-shaped groove; 1219. Third C-shaped groove; 1220. Fourth C-shaped groove; 1221. Inlet tube; 1222. Reinforcement; 13. Connecting tube; 131. Discharge port; 132. Connecting tube body; 133. Fixing plate; 1331. Locking projection; 1332. Swivel opening; 1333. Anti-loosening projection; 134. Inverted fixing element; 14. Limiting plate; 141. Puncture end; 142. Gripping end; 20. Glue-free and chemical solvent-free infusion set; 21. Infusion tube; 22. Locking element; 221. Swivel fitting; 2211. Swivel projection; 222. Outlet hole; 23. Inverted loop fitting; 2321. Extruded fastener; 2322. Deformation part; 2323. Snap-on part; 2324. Abutment section; 2326. Lateral support section; 2327. Stop section. Detailed description of embodiment

[0039] Embodiments of the present invention are described in detail below, and examples of these embodiments are illustrated in the accompanying drawings, in which identical or similar designations throughout indicate identical or similar elements or elements having identical or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended solely for the purpose of explaining the present invention and shall not be construed as a limitation of the present invention.

[0040] In the description of the present invention, it is understood that terms such as "central," "longitudinal," "transverse," "top," "bottom," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "lower," "inside," and "outside" are based on the orientation or position relationships illustrated in the figures and are intended solely to facilitate and simplify the description of the invention, rather than to indicate or imply that the device or element in question must have a specific orientation, orientation structure, or operation, and therefore cannot be understood as limiting the invention. Furthermore, the terms "first" and "second" are intended for descriptive purposes only; however, they are not intended to indicate or imply relative importance, nor to implicitly define the number of technical features shown.Thus, the feature with "the first" or "the second" may explicitly or implicitly include one or more of the stated features. In the description of the present invention, the word "several" means two or more, unless otherwise indicated.

[0041] In the description of the present invention, it should be noted that, unless expressly indicated or limited, the terms "mounting," "connection," and "linkage" should be understood in a broad sense, for example, as a fixed link, a removable link, or a rigid link; as a mechanical link or an electrical link; as a direct link, an indirect link using an intermediate part, or communication between two elements. For a person skilled in the art, the specific meaning of the above terms in the present invention can be understood on a case-by-case basis.

[0042] Referring to [Fig. 1], a first embodiment according to the present application provides a puncture-lock fitting 10 for patient infusion. First, the conical shape of the puncture tip allows it to be inserted into a bag or drug bottle to form a stable infusion channel. A puncture bevel 111 provided in the puncture tip allows the fluid to flow rapidly into the infusion line, thus reducing the risk of blockage. Second, the gripping portion 12 adopts a square main body 121 to provide a better gripping experience. The healthcare professional controls the angle and depth of the puncture-lock fitting via the gripping portion 12, which ensures stability during the puncture process and reduces operational risks caused by an unstable grip.Finally, one end of the connecting tube 13 is connected to the puncture tip, and the other end is connected to the infusion tube 21 via the discharge port 131. When the conical puncture tip 11 is inserted into the medical fluid bag, the fluid can flow smoothly into the infusion tube 21, ensuring the continuity and efficiency of the infusion process. Furthermore, the locking element 22 ensures a secure connection of the infusion tube 21 during operation, effectively preventing fluid leakage and improving the overall safety and reliability of use.

[0043] Referring to [Fig. 2] to 5, in certain embodiments, the piercing locking fitting 10 has the following elements as a single unit and arranged sequentially from top to bottom: a conical puncture tip 11, a limiting plate 14, a gripping part 12 and a connecting tube 13; the conical puncture tip 11 has a puncture bevel 111, which makes the liquid entry path smoother and reduces the possibility of blockage or reflux of the liquid; the limiting plate 14 has a puncture end 141 and a gripping end 142 arranged oppositely, the conical puncture tip 11 is arranged perpendicularly on the puncture end 141;The limiting plate 14 is designed to limit the displacement of the conical puncture tip 11, which in turn effectively limits excessive displacement of the conical puncture tip 11, preventing the puncture from being too deep, thus improving the safety and accuracy of the operation; the gripping part 12 has a square main body 121, one end of the square main body 121 is disposed perpendicular to the limiting plate 14; one end of the connecting tube 13 is fixedly disposed on the other end of the square main body 121, which allows, relative to; the existing cylindrical gripping structure, to increase friction during gripping, to avoid slipping problems due to sweaty hands or poor hand positions of healthcare professionals, and thus ensure greater stability and better safety during the operation; the other end of the connecting tube 13 is provided with a discharge port 131, the discharge port 131 is in communication with the puncture bevel 111, which makes the flow of liquid more fluid, improves the efficiency of the perfusion, reduces the problem of gas stagnation and obstruction, and further ensures the fluidity of the perfusion flow.

[0044] With reference to [Fig.2] to 5, in some embodiments, the main square body 121 has a first end face 1211 and a second end face 1212 arranged oppositely, a first gripping plate 1213 and a second gripping plate 1214 are arranged at the corners of the first end face 1211, and a third gripping plate 1215 and a fourth gripping plate 1216 are arranged at the corners of the second end face 1212, which provides additional support for the fingers, makes the grip more comfortable and stable and reduces fatigue during prolonged use;in which the first 1213, second 1214, third 1215 and fourth gripping plates 1216 are all arranged perpendicular to the limiting plate 14, which makes the force applied to the handle more uniform and avoids loss of control of the handle or the risk of partial slippage due to a single point of force, thus helping the healthcare professional to better control the use of the puncture tip.

[0045] With reference to [Fig. 2] to 5, in certain embodiments, a first C-shaped groove 1217 is disposed between the first gripping plate 1213 and the second gripping plate 1214, a second C-shaped groove 1218 is disposed between the third gripping plate 1215 and the fourth gripping plate 1216, a third C-shaped groove 1219 is disposed between the first gripping plate 1213 and the third gripping plate 1215, and a fourth C-shaped groove 1220 is disposed between the second gripping plate 1214 and the fourth gripping plate 1216, which not only optimizes the design of the gripping part 12, but also lightens the gripping structure and increases the contact surface of the fingers and friction, thus significantly reducing the possibility of slipping during use.

[0046] With reference to [Fig. 1] and 2, in certain embodiments, the third C-shaped groove 1219 is provided with an inlet tube 1221, the inlet tube 1221 being made to communicate with the discharge port 131 and the puncture bevel 111, which allows the gas to be efficiently evacuated into the pipeline, preventing the appearance of bubbles in the perfusion process, to ensure the continuity and stability of the flow of the liquid, and to avoid the problem of poor or delayed infusion due to gas obstruction.

[0047] In some embodiments, an air-permeable and impermeable membrane is provided in the inlet tube 1221, which allows air in the inlet tube 1221 to flow through the air inlet holes in the inlet tube 1221 and the air-permeable and impermeable membrane, and to prevent the liquid from flowing out of the inlet tube 1221, and thus to maintain the balance of the air pressure in the liquid withdrawal or infusion process, in order to ensure the continuity and stability of the liquid flow, and to avoid the problem of poor or delayed infusion due to gas obstruction.

[0048] With reference to [Fig.2] to 5, in certain embodiments, a number of reinforcements 1222 are respectively provided in the third C-shaped groove 1219 and the fourth C-shaped groove 1220, thus providing a reinforced support structure, so that the C-shaped groove exhibits better stability when subjected to pressure, preventing breakage or deformation of the grooves due to excessive stress, and ensuring the reliability of the puncture operation.

[0049] With reference to [Fig.4], in certain embodiments, a number of reinforcements 1222 may be provided in the form of cylindrical, ribbed or spacer plates, so that the structure of the reinforcements 1222 can be adjusted as required to further optimize the structural strength and pressure resistance performance of the piercing locking fitting 10, and to ensure the reliability of the piercing operation of the piercing locking fitting 10.

[0050] With reference to [Fig. 4] and 6, a second embodiment according to the present application provides a glue-free and chemical solvent-free infusion set 20. The glue-free and chemical solvent-free infusion set 20 comprises a perforation-lock fitting 10, an infusion tube 21 and a locking element 22 as described above, the connecting tube 13 comprising a connecting tube body 132, a fixing plate 133 and an inverted fixing element 134, the fixing plate 133 being looped onto one side of the connecting tube body 132 near the gripping part 12, and the inverted fixing element 134 being looped onto one end of the connecting tube body 132 opposite the gripping part 12; the infusion tube 21 being removably connected to the perforation-lock fitting 10;the locking element 22 being provided with an outlet hole 222, the outlet hole 222 is provided at one end of the locking element 22 opposite the connecting tube 13, the outlet hole 222 being designed for the outlet of the infusion tube 21; the locking element 22 being designed to; Securing the infusion tube 21 to the locking pierce fitting 10 significantly improves the airtight seal and the quality of the connection between the locking pierce fitting 10 and the infusion tube 21. This avoids the loosening problem that can be caused by traditional glued connections, eliminates the need for a hardening process using glue, and removes the safety risks associated with the evaporation of volatile organic compounds, thus ensuring patient safety. Furthermore, this eliminates air-drying time, reduces the manufacturing time and cost of the complete infusion set without glue or chemical solvents, and increases production capacity for this type of infusion set.

[0051] Referring to [Fig.7], in some embodiments, the locking element 22 is a swivel fitting 221, the swivel fitting 221 being provided with a plurality of swiveling projections 2211 on an inner wall oriented towards the connecting tube 13; in which the fixing plate 133 is provided with a plurality of locking projections 1331 supplied in one-to-one correspondence with the plurality of pivoting projections 2211, the plurality of locking projections 1331 is provided with pivoting openings 1332, the pivoting openings 1332 having dimensions adapted to the pivoting projections 2211, so as to securely connect the pivoting projections 2211 to the pivoting openings 1332 on the fixing plate 133, thus preventing leakage of liquid or drops due to loosening of the connection of the perfusion tubes 21 during perfusion, and ensuring the continuity and stability of the perfusion.An anti-loosening projection 1333 is disposed at the inlet of the swivel openings 1332, and the anti-loosening projection 1333 is designed to prevent the loosening of the swivel projections 2211 stuck in the swivel openings 1332; in which the infusion tube 21 exits the outlet hole 222, the infusion tube 21 is fitted into the body of the connecting tube 132, the swivel projection 2211 is abutted against the fixing plate 133, and the rotation of the swivel fitting 221 screws the plurality of swivel projections 2211 into the swivel openings 1332, thus avoiding the problem of loosening of the swivel projections 2211 due to twisting or pulling of the infusion tube 21 during prolonged infusion, and improving the overall safety of use.

[0052] With reference to [Fig. 8], in certain embodiments, the locking element 22 is a reverse loop fitting 23, the reverse loop fitting 23 comprising a plurality of extruded fasteners 2321, the plurality of extruded fasteners 2321 being fixedly arranged at one end of the reverse loop fitting 23 opposite the outlet hole 222; the extruded fasteners 2321 comprise deformation portions 2322 and snap-on portions 2323, which allows the The 23 reverse loop fitting can be assembled quickly during assembly, while greatly improving the strength and reliability of the connection.

[0053] With reference to [Fig.8], in certain embodiments, the snap-on part 2323 is provided with a stop section 2324, a lateral support section 2326 and a stop section 2327, which are formed as a single unit; in which the infusion tube 21 exits the outlet hole 222, and the infusion tube is inserted into the connecting tube body 132, in order to move the reverse loop fitting 23 towards the perforation locking fitting 10; the stop section 2324 comes against the fixing plate 133, and the deformation part 2322 unfolds outwards, in order to cause the deformation part 2322 to bend; The lateral support section 2326 comes against a side wall of the fixing plate 133, in order to snap the stop section 2327 into the fixing plate 133.Thus, thanks to the combined action of the stop section 2324, the lateral support section 2326 and the stop section 2327, it ensures that the connection between the infusion tube 21 and the perforation locking fitting 10 is stable and without loosening, thus preventing the risk of fluid leakage or loosening during infusion.

[0054] With reference to [Fig.9], in some embodiments, the infusion tube 21 can be directly inserted into the inverted fixing element 134, then the infusion tube 21 can be fitted into the connecting tube body 132, so as to achieve a tight fit between the infusion tube 21 and the connecting tube body 13, thus ensuring that the connection between the infusion tube 21 and the perforation locking fitting 10 is stable and without loosening, and thus avoiding the risk of fluid leakage or loosening during infusion.

[0055] In summary, the present invention relates to a puncture-lock fitting and an infusion set without glue or chemical solvents. The puncture-lock fitting comprises the following elements in one piece and arranged sequentially from top to bottom: a conical puncture tip, the conical puncture tip having a puncture bevel; a limiting plate, the limiting plate having a puncture end and a gripping end arranged in opposite directions, the conical puncture tip being arranged perpendicular to the puncture end, and the limiting plate being designed to limit the movement of the conical puncture tip; a gripping portion, the gripping portion having a square main body, one end of the square main body being arranged perpendicular to the limiting plate;a connecting tube, one end of the connecting tube being fixedly arranged on the other end of the main square body, the other end of the connecting tube being provided with a discharge orifice, the discharge orifice being in communication with the puncture bevel, which allows, in relation to the existing cylindrical gripping structure, an increase; friction during gripping, to avoid slipping problems due to sweaty hands or poor hand positions of healthcare professionals, and thus ensure greater stability and safety during the operation; in addition, the other end of the connecting tube is provided with a discharge port, and the discharge port is in communication with the puncture bevel, which makes the flow of liquid smoother, improves the efficiency of the infusion, reduces the problem of gas stagnation and obstruction of the infusion tube, and further ensures the smooth flow of the infusion.

[0056] It is understood that the applications of the present invention are not limited to the above examples, and a person skilled in the art may make improvements or variations in accordance with the above description, and all such improvements and variations shall fall within the scope of protection of the attached claims of the present invention.

Claims

Demands

1. A puncture-locking connector (10) for the infusion of a patient, characterized in that the puncture-locking connector has the following elements in one piece and arranged sequentially from top to bottom: a conical puncture tip (11), the conical puncture tip having a puncture bevel (111); a limiting plate (14), the limiting plate having a puncture end (141) and a gripping end (142) arranged oppositely, the conical puncture tip (11) being arranged perpendicular to the puncture end (141), and the limiting plate (14) being designed to limit the displacement of the conical puncture tip (11); a gripping portion (12), the gripping portion having a square main body (121), one end of the square main body being arranged perpendicular to the limiting plate (14);a connecting tube (13), one end of the connecting tube being fixedly disposed on the other end of the main square body (121), the other end of the connecting tube being provided with a discharge orifice (131), the discharge orifice being in communication with the puncture bevel (111).;

2. A piercing locking fitting (10) according to claim 1, characterized in that the main square body (121) has a first end face (1211) and a second end face (1212) arranged oppositely, a first gripping plate (1213) and a second gripping plate (1214) are arranged at the corners of the first end face (1211), and a third gripping plate (1215) and a fourth gripping plate (1216) are arranged at the corners of the second end face (1212); wherein the first, second, third and fourth gripping plates are all arranged perpendicular to the limiting plate (14).

3. A locking fitting with perforation (10) according to claim 2, characterized in that a first C-shaped groove (1217) is disposed between the first gripping plate (1213) and the second gripping plate (1214), a second groove a C-shaped groove (1218) is disposed between the third gripping plate (1215) and the fourth gripping plate (1216), a third C-shaped groove (1219) is disposed between the first gripping plate (1213) and the third gripping plate (1215), and a fourth C-shaped groove (1220) is disposed between the second gripping plate (1214) and the fourth gripping plate (1216).

4. A piercing locking fitting (10) according to claim 3, characterized in that the third C-shaped groove (1219) is provided with an inlet tube (1221), the inlet tube being provided in communication with the discharge orifice (131) and the puncture bevel (111).

5. A locking fitting with perforation (10) according to claim 3, characterized in that reinforcements (1222) are respectively provided in the third C-shaped groove (1219) and the fourth C-shaped groove (1220).

6. A locking fitting with perforation (10) according to claim 5, characterized in that reinforcements (1222) can be provided in the form of cylindrical, ribbed or spacer plates.

7. A glue-free and chemical solvent-free infusion set (20), characterized in that the glue-free and chemical solvent-free infusion set comprises: a pierced locking connector (10) according to any one of claims 1 to 6, the connecting tube (13) comprising a connecting tube body (132), a fixing plate (133) and an inverted fixing element (134), the fixing plate being looped onto one side of the connecting tube body (132) near the gripping part (12), and the inverted fixing element (134) being looped onto one end of the connecting tube body (132) opposite the gripping part (12); an infusion tube (21), the infusion tube being removably connected to the pierced locking connector (10);a locking element (22), the locking element having an outlet hole (222) provided at one end of the locking element (22) opposite the connecting tube (13), the outlet hole being designed for the outlet of the infusion tube (21); wherein the locking element (22) is designed to fix the infusion tube (21) to the pierced locking fitting (10).

8. A glue-free and chemical solvent-free infusion set (20) according to claim 7, characterized in that the locking element (22) is a swivel fitting (221), the swivel fitting being provided with a plurality of swiveling projections (2211) on an inner wall oriented towards the connecting tube (13); in which the fixing plate (133) is provided with a plurality of locking projections (1331) provided in one-to-one correspondence with the plurality of swiveling projections (2211), the plurality of locking projections (1331) is provided with swiveling openings (1332), the swiveling openings having dimensions adapted to the swiveling projections (2211); an anti-loosening projection (1333) is disposed at the level of the entrance of the pivoting openings (1332), and the anti-loosening projection (1333) is designed to prevent the loosening of the pivoting projections (2211) stuck in the pivoting openings (1332);in which the infusion tube (21) exits the outlet hole (222), the infusion tube (21) is fitted into the connecting tube body (132), the swiveling projection (2211) is abutted against the fixing plate (133), and the rotation of the swivel fitting (221) screws the plurality of swiveling projections (2211) into the swiveling openings (1332).

9. A glue-free and chemical solvent-free infusion set (20) according to claim 7, characterized in that the locking element (22) is a reverse loop fitting (23), the reverse loop fitting comprising a plurality of extruded fasteners (2321), the plurality of extruded fasteners being fixedly arranged at one end of the reverse loop fitting (23) opposite the outlet hole (222); the extruded fasteners (2321) comprise deformation portions (2322) and snap-on portions (2323).

10. A glue-free and chemical solvent-free infusion set (20) according to claim 9, characterized in that the snap-on portion (2323) is provided with a stop section (2324), a lateral support section (2326), and a stop section (2327), which are formed as a single unit; wherein the infusion tube (21) exits the outlet hole (222), and the infusion tube is inserted into the connecting tube body (132) in order to move the reverse loop fitting (23) toward the piercing locking fitting (10); the stop section (2324) comes against the fixing plate (133), and the deformation part (2322) deploys outwards, in order to cause the deformation part (2322) to bend; the lateral support section (2326) comes against a lateral wall of the fixing plate (133), in order to snap the stop section (2327) into the fixing plate (133).