Disposable infusion apparatus without bonding reagent

Abstract

The invention relates to a disposable infusion apparatus without a bonding reagent, which comprises a bottle stopper puncture outfit, a plastic soft elastic tube, a drip chamber, a precise dosing filter, a sensitive blood return device, a spiral two-way joint and an intravenous infusion needle, and further comprises a welding outer ring and a medicine outlet support column, the medicine outlet supporting columns are arranged on injection molding piece connecting ports of the bottle stopper puncture outfit, the drip chamber, the precise medicine adding filter, the spiral two-way connector, the sensitive blood return output end and the intravenous infusion needle respectively, and the welding outer rings are concentrically arranged on injection molding pieces corresponding to the outer side ends of the corresponding medicine outlet supporting columns in a sleeving mode. The welding outer ring and the protruding edges are additionally arranged on the injection molding part, during physical welding, the outer side end of the welding outer ring is folded inwards, so that the V-shaped opening is closed, the staggered meshing teeth are meshed together, and the plastic soft elastic tube is tightly welded and fixed to a connector of the injection molding part, and the deformation problem of thermal compression welding of the connector of the injection molding part is solved; and the safety risk of machinery caused by seepage of bonding reagent substances is avoided.

Description

Technical Field

[0001] This invention relates to a medical device, and more particularly to a disposable infusion set without adhesive reagents. Background Technology

[0002] In existing disposable infusion set products, the infusion tubing of disposable infusion sets uses plastic flexible tubing as the connecting tube to connect with other injection molded parts. There are two connection methods between the plastic flexible tubing and the injection molded parts. The first method is that the injection molded part has an outwardly protruding connector, and the plastic flexible tubing is fitted onto the connector. The second method is that the injection molded part has an outwardly protruding connector, and the plastic flexible tubing is inserted into the connector. The connection is always bonded with adhesive.

[0003] National standards stipulate that the materials used in disposable infusion sets should not cause toxic reactions to the medication or the recipient. Adhesive medical materials must not contain residual acetone, cyclohexanone, or other chemical substances. Acetone and cyclohexanone are chemical solvents that are harmful to the body. They mainly inhibit lymphocyte transformation, damage red blood cells leading to hemolysis, damage deoxyribonucleic acid, and cause liver enlargement. They also have an inhibitory effect on the central nervous system and can cause toxic damage and vascular aging to the lungs and liver.

[0004] In existing technologies, whether the first or second method is used, acetone, cyclohexanone, or other chemicals may seep out and remain in the infusion tubing at the joint between the plastic flexible tube and the injection molded part, which may lead to reduced product performance or pose a safety hazard to patients.

[0005] In the existing technology for producing disposable infusion sets, special air emission equipment needs to be installed in the bonding process, which greatly increases the equipment cost and operating cost.

[0006] Disposable infusion sets, once used, require the adhesive to be separated from the adhesive-free parts during waste recycling, which increases the difficulty of recycling and reuse.

[0007] The applicant previously filed a patent application for an adhesive-free infusion set, which involves adding a cylindrical sleeve to the injection molded part. The cylindrical sleeve is fitted onto the outside of the plastic flexible tube, and the front end of the cylindrical sleeve is connected to the injection molded part as a single unit. The connector of the injection molded part supports the plastic flexible tube, bringing the outer wall of the plastic flexible tube close to the inner wall of the cylindrical sleeve. The cylindrical sleeve and the plastic flexible tube are firmly welded together by laser, ultrasonic, or hot melt welding. However, the plastic tube connection is still not secure, the seal is not tight, and there are occasional problems with deformation of the injection molded part connector, making it difficult to meet the needs of large-scale unmanned automated production. Summary of the Invention

[0008] In view of this, the main objective of the present invention is to provide a disposable infusion set with non-adhesive reagents. Through this technical solution, a welded outer ring and raised ridge are added to the injection molded part, and the structure of the drip chamber is improved, which effectively enhances the anti-detachment tensile strength of the plastic soft elastic tube, and also effectively improves the sealing performance between the plastic soft elastic tube and the injection molded part connection, eliminates the deformation problem of physical welding of the injection molded part connection, achieves non-adhesive bonding, and eliminates the risk of medical device safety hazards caused by chemical leakage.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows: a disposable infusion set for non-adhesive reagents, comprising a bottle stopper puncture device, a plastic flexible tubing, a drip chamber, a precision drug dosing filter, a sensitive blood return device, a spiral two-way connector, and an intravenous infusion needle; the bottle stopper puncture device, drip chamber, precision drug dosing filter, and spiral two-way connector are connected in series via the plastic flexible tubing; the sensitive blood return output end and the intravenous infusion needle are connected in series via the plastic flexible tubing; in use, the spiral two-way connector is screwed onto... The sensitive blood return input terminal connector also includes a welded outer ring and a drug dispensing support column. The drug dispensing support column is respectively installed on the injection molded part connection port of the bottle stopper puncture device, drip chamber, precision drug dosing filter, spiral two-way connector, sensitive blood return output terminal and intravenous infusion needle. The welded outer ring is concentrically fitted on the corresponding injection molded part at the outer end of the corresponding drug dispensing support column, so that the injection molded part and the corresponding welded outer ring are connected as one unit. The plastic soft elastic tube is fitted on the drug dispensing support column at the injection molded part connection port, and the welded outer ring is located on the outside of the plastic soft elastic tube.

[0010] As a further technical solution, it also includes a V-shaped opening and staggered interlocking teeth. The V-shaped opening is set on both sides of the outer end of the welding outer ring, and the staggered interlocking teeth are respectively set on both sides of the opening of the V-shaped opening. Through physical welding, the V-shaped opening on the welding outer ring closes, and the corresponding staggered interlocking teeth interlock with each other.

[0011] As a further technical solution, it also includes protruding ridges, which are respectively set on the outer wall of the drug dispensing support column of the injection molded part connection port of the bottle stopper puncturist, drip chamber, precision drug dosing filter, spiral two-way connector, sensitive blood return output end and intravenous infusion needle input end.

[0012] As a further technical solution, the drip chamber also includes a conical concave ring, a conical convex ring, an outer edge of the drip bottle mouth, and a vertical edge of the drip bottle cap. The drip chamber is composed of a drip bottle cap, a drip bottle stopper ring, and a drip bottle. The drip bottle stopper ring is located below the drip bottle cap. The outer edge of the drip bottle mouth is located on the outer side of the upper opening of the drip bottle. The conical concave ring is located on the upper plane of the outer edge of the drip bottle mouth. The conical convex ring is located below the drip bottle cap. The vertical edge of the drip bottle cap is located on the drip bottle cap. The drip bottle cap is fastened to the drip bottle. The drip bottle stopper ring is inserted into the drip bottle mouth. The conical convex ring on the drip bottle cap is inserted into the conical concave ring on the drip bottle. The vertical edge of the drip bottle cap bends inward and covers the outer bottom surface of the outer edge of the drip bottle mouth on the drip bottle, so that the drip bottle cap is squeezed downward, causing the conical convex ring to be squeezed into the conical concave ring to achieve a sealing effect.

[0013] As a further technical solution, the length of the vertical edge of the dropper cap is 2mm-3mm greater than the height of the outer edge of the dropper mouth.

[0014] As a further technical solution, the precision dosing filter consists of an upper cover, a lower cover, a breathable membrane, a precision filter membrane, and a dosing port. The upper cover protrusion is fitted into the lower cover recess, and the outer edge of the precision filter membrane is set on the lower cover recess. The precision filter membrane is fixed in the lower cover recess by physical welding, and the upper cover and lower cover are physically welded together. The breathable membrane is physically welded to the vent hole at the upper edge of the upper cover. The dosing port is set on the upper cover, and the output end of the dosing port is connected to the inside of the upper cover. The injection molded connection ports of the precision dosing filter are respectively set on the upper cover and the lower cover.

[0015] As a further technical solution, the sensitive blood return device includes a hollow shell, a capsule holder, and a capsule. The hollow shell has a perforation, and the middle part of the capsule extends into the hollow shell through the perforation. The outer edge of the capsule is set on the capsule holder, and the capsule holder and the outer edge of the capsule are fixed to the hollow shell by physical welding.

[0016] The sensitive blood return device includes a hollow shell, a capsule fixing seat, a capsule fixing ring, and a capsule. The capsule fixing seat is perforated on the hollow shell. The middle part of the capsule extends into the hollow shell through the perforated part of the capsule fixing seat. The outer edge of the capsule is set on the capsule fixing seat. The capsule fixing ring is set on the outer edge of the capsule. The capsule fixing ring and the outer edge of the capsule are fixed to the capsule fixing seat of the hollow shell by physical welding.

[0017] As a further technical solution, the inner diameter of the welded outer ring on the injection-molded parts of the bottle stopper puncture device, drip chamber, precision drug dosing filter, spiral two-way connector, sensitive blood return output end and intravenous infusion needle input end is consistent with the outer diameter of the corresponding plastic soft elastic tube.

[0018] The beneficial effects of adopting the above technical solution are as follows: A disposable infusion set without adhesive reagents, through this technical solution, adds a welding outer ring and a raised ridge to the injection molded part, and improves the structure of the drip chamber. The injection molded part connection port supports the plastic soft elastic tube, so that the inner wall of the plastic soft elastic tube is tightly attached to the raised ridge, and the outer wall of the plastic soft elastic tube is close to the inner wall of the welding outer ring. During physical welding, the outer end of the welding outer ring is brought inward, so that the V-shaped opening closes, and the interlocking teeth interlock together to tightly weld and fix the plastic soft elastic tube to the injection molded part connection port. Under the action of the raised ridge, the anti-detachment tensile strength of the plastic soft elastic tube is greatly enhanced, and the sealing between the plastic soft elastic tube and the injection molded part connection port is also effectively improved, eliminating the deformation problem of physical welding of the injection molded part connection port, realizing no adhesive reagents, and eliminating the risk of medical device safety hazards caused by chemical leakage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the injection-molded connection structure of the precision dosing filter in this invention.

[0021] Figure 3 for Figure 2 A top view of a partial structural diagram of the connection port of an injection molded part.

[0022] Figure 4 This is a schematic diagram of the structure of the dripping funnel in this invention.

[0023] Figure 5 This is a side cross-sectional view of the precision dosing filter in this invention.

[0024] Figure 6 This is a side cross-sectional view of the sensitive blood return device in this invention.

[0025] In the diagram, 1. Bottle stopper puncture device, 2. Plastic flexible tube, 3. Dropper, 4. Precision drug dosing filter, 5. Sensitive blood return device, 6. Spiral two-way connector, 7. Sensitive blood return input terminal connector, 8. Intravenous infusion needle, 9. Welded outer ring, 10. Drug dispensing support column, 11. V-shaped opening, 12. Interlocking teeth, 13. Raised ridge, 14. Conical concave ring, 15. Conical convex ring, 16. Outer edge of dropper bottle mouth, 17. Dropper bottle cap rim, 18. Dropper bottle cap, 19. Dropper bottle stopper ring, 20. Dropper bottle, 21. Top cap, 22. Bottom cap, 23. Breathable membrane, 24. Precision filter membrane, 25. Drug dosing port, 26. Hollow shell, 27. Capsule holder, 28. Capsule, 29. Sensitive blood return output terminal, 30. Water stopper, 31. Flow regulator. Detailed Implementation

[0026] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0027] like Figures 1-6 As shown, the present invention relates to a disposable infusion set for non-adhesive reagents. The infusion set comprises a bottle stopper puncture device 1, a flexible plastic tube 2, a drip chamber 3, a precision drug dosing filter 4, a sensitive blood return device 5, a spiral two-way connector 6, and an intravenous infusion needle 8. The bottle stopper puncture device 1, the drip chamber 3, the precision drug dosing filter 4, and the spiral two-way connector 6 are connected in series via the flexible plastic tube 2. The sensitive blood return output end 29 and the intravenous infusion needle 8 are connected as one unit via the flexible plastic tube 2. In use, the spiral two-way connector 6 is screwed onto the sensitive blood return input end connector 7. It also includes a welding outer ring 9 and a drug dispensing support column 10. The drug dispensing support column 10 is respectively installed on the injection molded part connection port of the bottle stopper puncture device 1, the drip chamber 3, the precision drug dosing filter 4, the spiral two-way connector 6, the sensitive blood return output end 29, and the intravenous infusion needle 8. The welding outer ring 9 is concentrically fitted on the corresponding injection molded part at the outer end of the corresponding drug dispensing support column 10, so that the injection molded part and the corresponding welding outer ring 9 are connected as one unit. The plastic soft elastic tube 2 is fitted on the drug dispensing support column 10 at the injection molded part connection port, and the welding outer ring 9 is located on the outside of the plastic soft elastic tube 2.

[0028] As a further embodiment, it also includes a V-shaped opening 11 and interlocking teeth 12. The V-shaped opening 11 is disposed on both sides of the outer end of the welding outer ring 9, and the interlocking teeth 12 are respectively disposed on both sides of the opening of the V-shaped opening 11. Through physical welding, the V-shaped opening 11 on the welding outer ring 9 closes, and the corresponding interlocking teeth 12 interlock with each other.

[0029] As a further embodiment, it also includes a protruding ridge 13, which is respectively disposed on the outer wall of the drug dispensing support column 10 of the injection molded connection port of the bottle stopper puncturer 1, the dripping funnel 3, the precision drug dosing filter 4, the spiral two-way connector 6, the sensitive blood return output end 29 and the intravenous infusion needle 8.

[0030] As a further embodiment, the dripping funnel 3 further includes a conical concave ring 14, a conical convex ring 15, an outer edge 16 of the dripping bottle mouth, and a vertical edge 17 of the dripping bottle cap. The dripping funnel 3 is composed of a dripping bottle cap 18, a dripping bottle stopper ring 19, and a dripping bottle 20. The dripping bottle stopper ring 19 is located below the dripping bottle cap 18. The outer edge 16 of the dripping bottle mouth is located on the outer side of the upper opening of the dripping bottle 20. The conical concave ring 14 is located on the upper plane of the outer edge 16 of the dripping bottle mouth, and the conical convex ring 15 is located below the dripping bottle cap 18. The dropper cap 17 is set on the dropper cap 18, the dropper cap 18 is fastened to the dropper bottle 20, the dropper bottle stopper ring 19 is inserted into the bottle mouth of the dropper bottle 20, and the conical convex ring 15 on the dropper cap 18 is inserted into the conical concave ring 14 on the dropper bottle 20. By physically welding, the dropper cap 17 on the dropper cap 18 bends inward and covers the outer bottom surface of the outer edge 16 of the dropper bottle mouth on the dropper bottle 20, so that the dropper cap 18 is squeezed downward, and the conical convex ring 15 is squeezed into the conical concave ring 14 to achieve a sealing effect.

[0031] As a further embodiment, the length of the dropper cap's vertical edge 17 is 2mm-3mm greater than the height of the dropper bottle's outer edge 16.

[0032] As a further embodiment, the precision dosing filter 4 is composed of an upper cover 21, a lower cover 22, a breathable membrane 23, a precision filter membrane 24, and a dosing port 25. The protrusion of the upper cover 21 is fitted into the recess of the lower cover 22. The outer edge of the precision filter membrane 24 is disposed on the recess of the lower cover 22. The precision filter membrane 24 is fixed in the recess of the lower cover 22 by physical welding. The breathable membrane 23 is physically welded to the vent hole at the upper edge of the upper cover 21. The upper cover 21 and the lower cover 22 are connected as one unit by physical welding. The dosing port 25 is disposed on the upper cover 21. The output end of the dosing port 25 is connected to the inside of the upper cover 21. The injection molded connection ports of the precision dosing filter 4 are respectively disposed on the upper cover 21 and the lower cover 22.

[0033] As a further embodiment, the sensitive blood return device includes a hollow shell 26, a capsule fixing seat 27, and a capsule 28. The hollow shell 26 is provided with a perforation. The middle part of the capsule 28 extends into the hollow shell 26 through the perforation. The outer edge of the capsule 28 is disposed on the capsule fixing seat 27, and the capsule fixing seat 27 and the outer edge of the capsule 28 are fixed to the hollow shell 26 by physical welding.

[0034] As a further embodiment, the inner diameter of the welded outer ring 9 on the injection-molded parts of the bottle stopper puncture device 1, drip chamber 3, precision drug dosing filter 4, spiral two-way connector 6, sensitive blood return output end 29 and intravenous infusion needle 8 is consistent with the outer diameter of the corresponding plastic soft elastic tube 2.

[0035] In practical applications, this invention also includes a water stop 30 and a flow regulator 31. Both the water stop 30 and the flow regulator 31 are mounted on the plastic flexible tube 2 at corresponding positions. In application, the water stop 30 can seal the plastic flexible tube 2 to temporarily stop the infusion. In application, the flow regulator 31 can adjust the infusion flow rate according to the situation. Both the water stop 30 and the flow regulator 31 are known prior art and will not be described in further detail here.

[0036] In the embodiments of the present invention, the bottle stopper puncture device 1, drip chamber 3, precision drug dosing filter 4, sensitive blood return device 5, and spiral two-way connector 6 of the infusion set are all made of plastic injection molding, and the intravenous infusion needle 8 is integrally injection molded from a metal needle and a plastic injection molded part.

[0037] In an embodiment of the present invention, the plastic flexible tube 2 is fitted onto the outer wall of the drug dispensing support column 10 at the injection molding part connection port and onto the protruding ridge 13 on the drug dispensing support column 10. The outer ring 9 is welded to the outside of the plastic flexible tube 2. Under physical welding, the V-shaped opening 11 of the outer ring 9 closes, and the interlocking teeth 12 interlock with each other to tightly weld and fix the plastic flexible tube 2 to the drug dispensing support column 10 at the injection molding part connection port. Under the action of the protruding ridge 13, the anti-detachment tensile strength of the plastic flexible tube 2 is greatly enhanced, and the sealing between the plastic flexible tube 2 and the drug dispensing support column 10 at the injection molding part connection port is also effectively improved.

[0038] In an embodiment of the present invention, the dropper cap 18 is fastened onto the dropper bottle 20, and the dropper cap vertical edge 17 in the dropper funnel 3 is firmly fixed to the outer edge 16 of the dropper bottle mouth by physical welding. At the same time, the lower end of the dropper cap vertical edge 17 is bent inward under heat deformation and pressed against the bottom surface of the outer edge 17 of the dropper bottle mouth.

[0039] In an embodiment of the present invention, the precision dosing filter 4 is composed of two injection-molded parts, an upper cover 21 and a lower cover 22. The two injection-molded parts are physically welded together. The precision filter membrane 24 disposed in the recess of the lower cover 22 can be fixed to the recess of the lower cover 22 by spot welding, or the precision filter membrane 24 can be fixed by the cooperation between the protrusion of the upper cover 21 and the recess of the lower cover 22. The breathable membrane 23 can be directly fixed to the vent on the inner side of the upper cover 21 by surface welding. The dosing port 25 can be set as a 6:100 conical latex interface to realize direct dosing of medicine without needles.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A disposable infusion set for non-adhesive reagents, the infusion set comprising a stopper puncture device, a plastic flexible tubing, a drip chamber, a precision drug dosing filter, a sensitive blood return device, a spiral two-way connector, and an intravenous infusion needle, wherein the stopper puncture device, the drip chamber, the precision drug dosing filter, and the spiral two-way connector are connected in series via the plastic flexible tubing; the sensitive blood return output end and the intravenous infusion needle are connected in series via the plastic flexible tubing; in use, the spiral two-way connector is screwed onto the sensitive blood return input end connector, characterized in that... It also includes a welded outer ring and a medicine outlet support column, which is respectively arranged on the injection molding part connecting port of the bottle plug puncture device, the dropper, the precise medicine adding filter, the spiral two-way joint, the sensitive blood return output end and the intravenous infusion needle, the welded outer ring is concentrically sleeved on the injection molding part corresponding to the outer side end of the corresponding medicine outlet support column, so that the injection molding part and the corresponding welded outer ring are connected as a whole, the plastic soft elastic tube is sleeved on the medicine outlet support column of the injection molding part connecting port, and the welded outer ring is arranged outside the plastic soft elastic tube.

2. The adhesive-free, disposable infusion set of claim 1, wherein, It also includes a V-shaped opening and staggered teeth, the V-shaped opening is arranged on both sides of the outer side end of the welded outer ring, and the staggered teeth are respectively arranged on both sides of the opening of the V-shaped opening. Through physical welding, the V-shaped opening on the welded outer ring is folded, and the corresponding staggered teeth are mutually engaged.

3. The adhesive-free, disposable infusion set of claim 1, wherein, It also includes a convex rib, which is respectively arranged on the outer side wall of the medicine outlet support column of the injection molding part connecting port of the bottle plug puncture device, the dropper, the precise medicine adding filter, the spiral two-way joint, the sensitive blood return output end and the intravenous infusion needle input end.

4. The adhesive-free, disposable infusion set of claim 1, wherein, The dropper also includes a conical concave ring, a conical convex ring, a dropper port outer edge and a dropper cover vertical edge, the dropper is composed of a dropper cover, a dropper plug ring and a dropper, the dropper plug ring is arranged below the dropper cover, the dropper port outer edge is arranged on the outer side of the upper opening of the dropper, the conical concave ring is arranged on the plane of the dropper port outer edge, the conical convex ring is arranged below the dropper cover, the dropper cover vertical edge is arranged on the dropper cover, the dropper cover is buckled on the dropper, the dropper plug ring is inserted into the dropper port, the conical convex ring on the dropper cover is inserted into the conical concave ring on the dropper, and the dropper cover vertical edge on the dropper cover is bent inward and wrapped on the outer side bottom surface of the dropper port outer edge on the dropper, so that the dropper cover is extruded downward, the conical convex ring is extruded into the conical concave ring, and a sealing effect is achieved.

5. The adhesive-free, disposable infusion set of claim 4, wherein, The length of the dropper cover vertical edge is 2mm-3mm greater than the height of the dropper port outer edge.

6. The adhesive-free, disposable infusion set of claim 1, wherein, The precise medicine adding filter is composed of an upper cover, a lower cover, a breathable film, a precise filter film and a medicine adding port, the upper cover boss is buckled in the lower cover recess, the outer edge of the precise filter film is arranged on the lower cover recess, the precise filter film is fixed in the lower cover recess by physical welding, the upper cover and the lower cover are physically welded and connected as a whole, the breathable film is physically welded on the breathable hole at the upper edge of the upper cover, the medicine adding port is arranged on the upper cover, the output end of the medicine adding port is connected with the inner side of the upper cover, and the injection molding part connecting ports of the precise medicine adding filter are arranged on the upper cover and the lower cover.

7. The adhesive-free, disposable infusion set of claim 1, wherein, The sensitive blood return device includes a hollow shell, a capsule fixing seat and a capsule, the hollow shell is provided with a through hole, the middle part of the capsule extends into the hollow shell through the through hole, the outer edge of the capsule is arranged on the capsule fixing seat, and the capsule fixing seat and the outer edge of the capsule are fixed on the hollow shell by physical welding.

8. The adhesive-free, disposable infusion set of claim 1, wherein, The inner diameter of the welded outer ring arranged on the injection molding part of the bottle plug puncture device, the dropper, the precise medicine adding filter, the spiral two-way joint, the sensitive blood return output end and the intravenous infusion needle input end is consistent with the outer diameter of the corresponding plastic soft elastic tube.

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