CN219090532U - Needleless connection type injection piece - Google Patents
Needleless connection type injection piece Download PDFInfo
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- CN219090532U CN219090532U CN202222247733.8U CN202222247733U CN219090532U CN 219090532 U CN219090532 U CN 219090532U CN 202222247733 U CN202222247733 U CN 202222247733U CN 219090532 U CN219090532 U CN 219090532U
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- positive pressure
- pressure valve
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Abstract
The utility model discloses a needleless connection type injection piece, which comprises: an injector housing (10), an injector cap (30), and a positive pressure valve (40); an end cap (11) is formed at the upper end of the injection member housing (10) for connecting the injection member cover (30) and the positive pressure valve (40); the end cap (11) comprises an upper connecting end (11-1), a lower connecting end (11-2) and a vertebral body (11-3) between the upper connecting end (11-1) and the lower connecting end (11-2); a liquid medicine through hole (11-4) communicated with the inside of the injection shell (10) is formed in the vertebral body (11-3); the positive pressure valve (40) is sleeved in the injection piece cover (30), and the lower ends of the positive pressure valve (40) and the injection piece cover (30) are respectively fixed at an upper connecting end (11-1) and a lower connecting end (11-2) of the end cap (11) at the upper end of the injection piece shell (10) in a sealing mode.
Description
Technical Field
The utility model relates to the technical field of medical appliances, in particular to a needleless connection type injection piece.
Background
The injection piece is used as one of the component parts of the infusion set and the blood transfusion set and is used for adding medicine in the infusion process. The accessory is widely applied to clinical transfusion and blood transfusion and has the characteristics of large application amount and wide clinical application range. The accessory consists of an injection piece shell and a rubber plug, when in use, medical staff uses a syringe to inject medicine into the injection piece shell through the puncture rubber plug, and finally infuses the medicine into a patient.
Fig. 1 and 2 are front and cross-sectional views of an injection device of the prior art. As shown, the prior art injection device suffers from the following disadvantages:
a. in the process of puncturing and dosing, medical staff risks to generate puncture falling scraps or puncture the tube wall of the infusion set to leak, so that a patient generates a heat source reaction;
b. the medical staff punctures and adds the process of medicine, the operation is tedious, the work efficiency is low, there is the risk of being punctured by the needle at the same time;
c. the liquid inlet pipe is a straight pipe and is obliquely connected with the injector shell, and the distance between the connecting point and the end cap is larger, so that the dosing dead angle of the injection piece is larger, air bubbles are easy to generate, and air is injected into a patient.
There is thus a need to develop a needleless connection type injection which at least partially solves the problems of the prior art.
Disclosure of Invention
To this end, the present application aims to provide a needleless connection type injection comprising: an injector housing (10), an injector cap (30), and a positive pressure valve (40);
wherein, the upper end of the injection piece shell (10) is provided with an end cap (11) for connecting the injection piece cover (30) and the positive pressure valve (40); the end cap (11) comprises an upper connecting end (11-1), a lower connecting end (11-2) and a vertebral body (11-3) between the upper connecting end (11-1) and the lower connecting end (11-2); a liquid medicine through hole (11-4) communicated with the inside of the injection shell (10) is formed in the vertebral body (11-3);
the injection piece cover (30) is formed into a cylinder shape and comprises an upper connecting section (31) with gradually increased inner diameter, a middle transfusion section (32) and a lower connecting section (33), wherein the lower end surface of the lower connecting section (33) is in sealing connection with the lower connecting end (11-2), and a space (50) is formed between the lower connecting section (33) and the vertebral body (11-3); a liquid medicine channel (34) is formed on the inner walls of the middle transfusion section (32) and the lower connecting section (33), and the liquid medicine channel (34) is communicated with the space (50) and then is communicated with the inside of the injection shell (10);
the positive pressure valve (40) is arranged inside the injection piece cover (30) and is basically consistent with the shape of the inner cavity of the injection piece cover (30), and the positive pressure valve (40) comprises an upper switch section (41), a middle section (42) and a lower combining section (43); an inner cavity (44) is formed in the intermediate section (42), and the lower coupling section (43) is sealingly coupled to the upper connecting end (11-1) of the end cap (11), the inner cavity (44) being in communication with the environment outside the injection member through a vertical air passage (11-5) formed in the end cap (11).
According to an embodiment of the utility model, the needleless connection type injection further comprises a liquid inlet pipe (20), wherein the liquid inlet pipe (20) is arranged on the injection part shell (10) and communicated with the inside of the injection part shell (10).
According to an embodiment of the utility model, the connection point of the liquid inlet pipe (20) and the injection part shell (10) is adjacent to the end cap (11), and the liquid inlet pipe (20) is an elbow pipe, and a section adjacent to the connection point is arc-shaped.
According to an embodiment of the utility model, the upper connecting section (31) is formed with a thread on its outer circumference.
According to an embodiment of the utility model, the outer circumference of the intermediate infusion section (32) is formed with a bulge.
According to an embodiment of the present utility model, the liquid medicine passage (34), the liquid medicine through hole (11-4), and the air passage (11-5) are all plural.
The design of the needleless connection type injection piece does not generate falling scraps, so that the infusion of patients is safer; the design is convenient and simple to operate, can improve the working efficiency of medical staff and prevent the medical staff from being needled; in addition, the dead angle of this design is less, is difficult for gathering air and produces the bubble to this design has the malleation function, and the medicine residue that produces is few.
Drawings
FIG. 1 is a schematic elevational view of an infusion set injection member according to the prior art;
FIG. 2 is a schematic cross-sectional view of an infusion set injection member according to the prior art;
FIG. 3 is a schematic perspective view of an infusion set injection member according to an embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of the infusion set injection device of FIG. 3;
FIG. 5 is a schematic cross-sectional view of an alternative angle of the infusion set injection device of FIG. 3;
FIG. 6 is a vertical cross-sectional view of an injection cap of an infusion set injection according to an embodiment of the present utility model;
FIG. 7 is a horizontal cross-sectional view of an injection cap of an infusion set injection according to an embodiment of the utility model;
FIG. 8 is a front view of an injector housing of an infusion set injector according to an embodiment of the disclosures made herein;
FIG. 9 is a cross-sectional view of an injector housing of an infusion set injector in accordance with an embodiment of the present utility model;
FIG. 10 is a front view of a positive pressure valve of an infusion set injection device in accordance with an embodiment of the present utility model;
FIG. 11 is a side view of a positive pressure valve of an infusion set injection device in accordance with an embodiment of the present utility model; and
fig. 12 is a cross-sectional view of a positive pressure valve of an infusion set injection device in accordance with an embodiment of the present utility model.
Detailed Description
The utility model will be better understood from the drawings and the following examples. However, it will be readily appreciated by those skilled in the art that the description of the embodiments is provided for illustration only and should not be construed as limiting the utility model.
Fig. 3-5 are schematic views of a perspective and cross-sectional structure of an infusion set injection according to an embodiment of the present utility model. Referring to fig. 3-5, a needleless connection injection of an embodiment can include: an injector housing 10, a liquid inlet tube 20, an injector cap 30, and a positive pressure valve 40; wherein the liquid inlet pipe 20 is connected to the side wall of the syringe housing 10, the positive pressure valve 40 is sleeved inside the syringe cover 30, and the lower ends of the positive pressure valve 40 and the syringe cover 30 are respectively sealed and fixed on the end cap 11 at the upper end of the syringe housing 10, thereby forming an integral infusion set syringe.
FIG. 8 is a front view of an injector housing of an infusion set injector according to an embodiment of the disclosures made herein; fig. 9 is a cross-sectional view of an injector housing of an infusion set injector according to an embodiment of the utility model. As shown, the upper end of the syringe housing 10 is formed with an end cap 11 for connecting the syringe cap 30 and the positive pressure valve 40; the end cap 11 comprises an upper connecting end 11-1, a lower connecting end 11-2, a cone 11-3 between the upper connecting end 11-1 and the lower connecting end 11-2 and a vertical air channel 11-5 which is penetrated up and down; in addition, a drug solution through hole 11-4 communicating with the inside of the syringe housing 10 is formed in the vertebral body 11-3. The vertical air passage 11-5 and the medicine liquid passage 11-4 may be designed in plural, but the vertical air passage 11-5 and the medicine liquid passage 11-4 are not communicated with each other and do not interfere with each other.
FIG. 6 is a vertical cross-sectional view of an injection cap of an infusion set injection according to an embodiment of the present utility model; fig. 7 is a horizontal cross-sectional view of an injection cap of an infusion set injection according to an embodiment of the utility model. Referring to the drawings, the injection cap 30 may be formed in a cylindrical shape, including an upper connection section 31, an intermediate transfusion section 32, and a lower connection section 33, which have gradually increasing inner diameters; the lower end surface of the lower connecting section 33 is hermetically connected (e.g., by welding) to the lower connecting end 11-2 of the end cap 11, and a space 50 (see fig. 5) is formed between the lower connecting section 33 and the vertebral body 11-3 of the end cap 11; a plurality of liquid medicine passages 34 are formed on the inner walls of the intermediate transfusion section 32 and the lower connection section 33, and the liquid medicine passages 34 communicate with the space 50 and thus communicate with the inside of the syringe housing 10. Further, threads are formed on the outer periphery of the upper connecting section 31 for luer lock connection during administration. A protrusion 321 is formed on the outer circumference of the middle transfusion section 32, so as to play a role of rotation and skid resistance.
Fig. 10-12 are front, side and cross-sectional views of a positive pressure valve of an infusion set injection device in accordance with an embodiment of the present utility model. As shown, the positive pressure valve 40 is disposed inside the syringe cap 30, substantially conforming to the shape of the interior cavity of the syringe cap 30, the positive pressure valve 40 comprising an upper switching section 41, a middle section 42, and a lower coupling section 43. The upper switch section 41 is formed with an asymmetric recess which is deformable to one side during use, thereby effecting a switching action. The intermediate section 42 has an interior cavity 44 formed therein; the lower coupling section 43 has an inner cavity formed therein that is substantially identical in shape to the upper connecting end 11-1 of the end cap 11, whereby the upper connecting end 11-1 of the end cap 11 can be fitted into the lower coupling section 43 by elastic deformation to achieve sealing coupling. In addition, the internal cavity 44 communicates with the environment outside the syringe via a vertical air passage 11-5 in the end cap 11. The positive pressure valve 40 may be made of a medical polymer material such as polyurethane, and has good elastic deformability.
When the syringe is connected to the luer lock, the positive pressure valve 40 is compressed downward, the upper switch section 41 deforms to one side and downward, and the internal cavity 44 of the intermediate section 42 is compressed to reduce the volume, so that the air in the interior is discharged from the air passage 11-5. The volume of the internal cavity 44 is reduced, and at the same time, the clearance between the positive pressure valve and the needleless injector cover is increased, so that the liquid medicine passes through the clearance, the liquid medicine channel 34 and the liquid medicine through hole 11-4 to form a passage, and enters the pipeline of the injector shell 10 to realize the function of infusing the liquid medicine. After the medicine is added, the injector is separated, the volume of the internal cavity 44 is restored to apply pressure, the clearance between the positive pressure valve and the injection cover 30 is reduced, and the residual medicine liquid in the inner cavity is discharged to the medicine liquid infusion direction through the medicine liquid channel 34 and the medicine liquid through hole 11-4, so that the purpose of forward flowing of the medicine liquid is achieved.
Specific embodiments are given above, but the present utility model is not limited to the above-described embodiments. The basic idea of the utility model is that the above basic scheme, it is not necessary for a person skilled in the art to design various modified models, formulas, parameters according to the teaching of the utility model to take creative effort. Variations, modifications, substitutions and alterations are also possible in the embodiments without departing from the principles and spirit of the present utility model.
Claims (6)
1. A needleless connection injection comprising: an injector housing (10), an injector cap (30), and a positive pressure valve (40);
wherein, the upper end of the injection piece shell (10) is provided with an end cap (11) for connecting the injection piece cover (30) and the positive pressure valve (40); the end cap (11) comprises an upper connecting end (11-1), a lower connecting end (11-2) and a vertebral body (11-3) between the upper connecting end (11-1) and the lower connecting end (11-2); a liquid medicine through hole (11-4) communicated with the inside of the injection shell (10) is formed in the vertebral body (11-3);
the injection piece cover (30) is formed into a cylinder shape and comprises an upper connecting section (31) with gradually increased inner diameter, a middle transfusion section (32) and a lower connecting section (33), wherein the lower end surface of the lower connecting section (33) is in sealing connection with the lower connecting end (11-2), and a space (50) is formed between the lower connecting section (33) and the vertebral body (11-3); a liquid medicine channel (34) is formed on the inner walls of the middle transfusion section (32) and the lower connecting section (33), and the liquid medicine channel (34) is communicated with the space (50) and then is communicated with the inside of the injection shell (10);
the positive pressure valve (40) is arranged inside the injection piece cover (30) and is basically consistent with the shape of the inner cavity of the injection piece cover (30), and the positive pressure valve (40) comprises an upper switch section (41), a middle section (42) and a lower combining section (43); an inner cavity (44) is formed in the intermediate section (42), and the lower coupling section (43) is sealingly coupled to the upper connecting end (11-1) of the end cap (11), the inner cavity (44) being in communication with the environment outside the injection member through a vertical air passage (11-5) formed in the end cap (11).
2. The needle-free connecting injection device according to claim 1, further comprising a liquid inlet tube (20), wherein the liquid inlet tube (20) is arranged on the injection device housing (10) and is communicated with the inside of the injection device housing (10).
3. A needleless connection type injection as claimed in claim 2, in which the connection point of the inlet tube (20) to the injection housing (10) is adjacent to the end cap (11), and in which the inlet tube (20) is an elbow, the section adjacent to the connection point being arcuate.
4. Needleless connection type injection as claimed in claim 1, in which the upper connection section (31) is formed with a thread on its periphery.
5. The needleless connection type injection as claimed in claim 1, wherein the intermediate transfusion section (32) is formed with a protrusion at its outer periphery.
6. The needle-free connection type injection according to claim 1, wherein the liquid medicine passage (34), the liquid medicine through hole (11-4) and the air passage (11-5) are all plural.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222247733.8U CN219090532U (en) | 2022-08-25 | 2022-08-25 | Needleless connection type injection piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222247733.8U CN219090532U (en) | 2022-08-25 | 2022-08-25 | Needleless connection type injection piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219090532U true CN219090532U (en) | 2023-05-30 |
Family
ID=86465298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222247733.8U Active CN219090532U (en) | 2022-08-25 | 2022-08-25 | Needleless connection type injection piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219090532U (en) |
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2022
- 2022-08-25 CN CN202222247733.8U patent/CN219090532U/en active Active
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