Single-to-double connector and infusion apparatus assembly

Abstract

The utility model relates to the technical field of medical accessories, in particular to a single-to-double connector and infusion apparatus assembly which comprises a first infusion tube, a second infusion tube, a third infusion tube and a control valve, one end of the first infusion tube is communicated with the control valve, the other end of the first infusion tube is used for being communicated with an infusion apparatus, and one end of the second infusion tube is communicated with the control valve. One end of the third infusion tube is communicated with the control valve, and the other end of the third infusion tube is communicated with the infusion bottle; the communication state of the infusion tube is changed by adjusting the control valve, time of medical staff is prevented from being wasted, the working efficiency of the medical staff is improved, meanwhile, blood of a patient is prevented from flowing back into the infusion tube, thrombus is prevented from being formed to block the infusion tube, and sustainable infusion treatment is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical accessories, in particular to a single-to-double connector and an infusion set component. Background Art

[0002] As people's living standards improve, they pay more and more attention to their own health. When they are sick, they are more willing to go to large hospitals for treatment in order to get better treatment results. As a result, there are more and more patients in hospitals. Infusion is a commonly used treatment method in clinical practice. Liquid drugs or solutions are delivered to the human body through intravenous, intramuscular or subcutaneous injections to achieve therapeutic purposes. This treatment method is usually used to give drugs, water or nutrients to meet the needs of patients or treat specific diseases. Infusion can be performed through different routes, including intravenous infusion, intramuscular injection and subcutaneous injection.

[0003] However, an infusion set is usually used during the infusion process. The current infusion set has a single connector and can only be connected to one infusion bottle at a time. When a patient needs to receive more liquid medicine, multiple infusion bottles may be required. Usually, medical staff will leave after connecting the infusion bottle to the patient through the infusion set, allowing the patient to receive the infusion by himself. When the liquid medicine is almost delivered, the patient or the accompanying family member will call the medical staff to replace the infusion bottle. For some patients, there may still be a lot of liquid in the infusion bottle that has not been delivered before the medical staff is called, causing the medical staff to carry a new infusion bottle and wait for replacement beside the patient's bedside, which delays the medical staff's time and reduces the work efficiency of the medical staff. Especially when there are more and more patients, the time of the medical staff is very precious; for some patients, the liquid in the infusion bottle may be delivered soon before the medical staff is called, and the medical staff happens to have other matters on hand and cannot get away temporarily, causing the patient's blood to flow back into the infusion tube and stay in the infusion tube for a long time, causing the blood to coagulate into a thrombus in the infusion tube, further blocking the infusion tube and affecting the use of the infusion tube.

[0004] Therefore, based on the above-mentioned shortcomings, there is an urgent need to design a single-to-double connector and an infusion set assembly. Summary of the invention

[0005] The purpose of the utility model is to provide a single-to-double connector and an infusion set assembly to address the above-mentioned disadvantage that the current infusion set has only a single connector during use, which causes medical staff to need to replace the connection between the infusion set and the infusion bottle many times.

[0006] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0007] A single-to-double connector, comprising a first infusion tube, a second infusion tube, a third infusion tube and a control valve, wherein one end of the first infusion tube is connected to the control valve, and the other end is used to be connected to an infusion set, one end of the second infusion tube is connected to the control valve, and the other end is used to be connected to an infusion bottle, and one end of the third infusion tube is connected to the control valve, and the other end is used to be connected to an infusion bottle;

[0008] The conversion valve is used to switch the on-off state between the first infusion tube, the second infusion tube and the third infusion tube, and the on-off state includes three states:

[0009] State 1: the first infusion tube is connected to the second infusion tube, and the first infusion tube is disconnected from the third infusion tube;

[0010] State 2: the first infusion tube is connected to the third infusion tube, and the first infusion tube is disconnected from the second infusion tube;

[0011] State three: the first infusion tube is disconnected from the second infusion tube, and the first infusion tube is disconnected from the third infusion tube.

[0012] As a preferred technical solution of the present application, one end of the second infusion tube and the third infusion tube used for connection with the infusion bottle is provided with a conical puncture head, and the conical puncture head is used for puncturing the rubber stopper of the infusion bottle.

[0013] As a preferred technical solution of the present application, surfaces of the second infusion tube and the third infusion tube are provided with different colors for distinguishing the second infusion tube from the third infusion tube.

[0014] As a preferred technical solution of the present application, the control valve includes a valve stem, the valve stem is L-shaped, and the directions of the valve stem correspond to three different on-off states;

[0015] In state 1, the valve stem points to the second infusion tube;

[0016] In state 2, the valve stem points to the third infusion tube;

[0017] In state three, the valve stem points to the area between the second infusion tube and the third infusion tube.

[0018] As a priority technical solution of the present application, an elastic rubber plug is provided at one end of the first infusion tube used for connecting with the infusion set, and the elastic rubber plug is used for sealing the first infusion tube. The bottle plug piercer of the infusion set can pierce the elastic rubber plug and connect with the first infusion tube.

[0019] As a preferred technical solution of the present application, the elastic rubber plug includes an insertion section and an external section, the size of the insertion section is adapted to the inner wall size of the first infusion tube, and the size of the external section is larger than the outer wall size of the first infusion tube.

[0020] As a preferred technical solution of the present application, a groove is provided on the insertion section, and a convex strip is provided on the inner wall of the first infusion tube, and the groove is adapted to the convex strip.

[0021] As a preferred technical solution of the present application, the convex strip is arranged obliquely, the inclination direction of the convex strip is in the same direction as the insertion direction of the elastic rubber plug, and the inclination direction of the groove is adapted to the inclination direction of the convex strip.

[0022] As a preferred technical solution of the present application, there are multiple convex strips, and the multiple convex strips are spaced apart along the insertion direction of the elastic plug, and the number of the grooves is adapted to the number of the convex strips.

[0023] In order to achieve the above-mentioned purpose of the invention, the utility model also provides the following technical solutions: an infusion set assembly adopts the above-mentioned single-to-double connector.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] 1. In the scheme of the present application, the control valve is adjusted to state three, and then the second infusion tube and the third infusion tube are connected to different infusion bottles respectively, and then one end of the infusion device is connected to the first infusion tube, and the other end is connected to the patient, and the control valve is adjusted to state one to achieve the connection between the first infusion tube and the second infusion tube. After the liquid in the infusion bottle connected to the second infusion tube is delivered, the control valve is adjusted to state two to achieve the connection between the first infusion tube and the third infusion tube, and the liquid in the infusion bottle connected to the third infusion tube is continued to be delivered to the patient. After the medical staff adjusts the control valve to state one, they can temporarily leave. When the liquid in the infusion bottle connected to the second infusion tube is delivered, the patient or the accompanying family member can adjust the control valve to state two by themselves, and continue to deliver the infusion connected to the third infusion tube. When the liquid in the bottle is delivered to the patient, the patient or the accompanying family member can notify the medical staff after adjusting the control valve to the second state, and the medical staff can directly replace the infusion bottle connected to the second infusion tube with a new infusion bottle. In this way, the medical staff can avoid waiting at the patient's bedside, avoid wasting the medical staff's time, and improve the work efficiency of the medical staff. At the same time, it takes a certain amount of time to complete the delivery of the liquid in the infusion bottle connected to the third infusion tube. During this process, after the patient or the accompanying family member notifies the medical staff, even if the medical staff has other matters on hand and cannot leave temporarily, the continuous delivery of the liquid in the infusion bottle connected to the third infusion tube can prevent the patient's blood from flowing back into the infusion tube, further forming a thrombus to block the infusion tube, which is conducive to the sustainable implementation of infusion therapy.

[0026] 2. The setting of the elastic rubber plug is used to block the first infusion tube on the one hand to prevent the external environment from polluting the inside of the first infusion tube, and on the other hand to connect with the bottle plug puncture of the infusion set, thereby ensuring the connection between the infusion set and the first infusion tube, and at the same time sealing the connection, thereby reducing the risk of liquid leakage from the connection, and improving the reliability of the single-to-double connector of the present application;

[0027] 3. After the bottle plug piercer of the infusion set is inserted into the elastic rubber plug, the connection between the bottle plug piercer of the infusion set and the elastic rubber plug is maintained under the mutual squeezing action between the bottle plug piercer of the infusion set and the elastic rubber plug, thereby ensuring the connection between the infusion set and the first infusion tube. When the infusion set is dragged, if it is accidentally touched by others or dragged unconsciously by the patient, there is a risk that the infusion set drives the elastic rubber plug to move and the elastic rubber plug is disconnected from the first infusion tube. The arrangement of the groove and the convex strip structure prevents the elastic rubber plug from being disconnected from the first infusion tube, thereby improving the reliability of the single-to-double connector of the present application.

[0028] 4. With the above structure, on the one hand, when the bottle plug piercer of the infusion set is inserted into the elastic rubber plug, the insertion resistance is reduced, which is conducive to the insertion of the bottle plug piercer of the infusion set; on the other hand, when the bottle plug piercer of the infusion set is subjected to external force and there is a risk of being pulled outward and driving the elastic rubber plug to move, the inclined convex strip increases the resistance of the elastic rubber plug to be separated from the connection with the first infusion tube, further reducing the risk of the elastic rubber plug being separated from the connection with the first infusion tube, and improving the reliability of the single-to-double connector of the present application;

[0029] 5. The arrangement of the multiple convex strips ensures that when the bottle plug piercer of the infusion set is subjected to an external force and there is a risk of being pulled outward and driving the elastic rubber plug to move, as the elastic rubber plug moves outward, the resistance to be overcome becomes greater and greater until the elastic rubber plug stops moving outward. In this way, even if the elastic rubber plug moves outward a certain distance, the connection between the elastic rubber plug and the first infusion tube can still be maintained, thereby improving the reliability of the single-to-double connector of the present application. At the same time, the arrangement of the multiple convex strips has a buffering effect on the pulling out of the bottle plug piercer of the infusion set, thereby reducing the risk of the infusion set being pulled off, and facilitating the sustainable implementation of infusion therapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of one implementation of a single-to-double joint of the present application;

[0031] Figure 2 It is a cross-sectional structural schematic diagram of one embodiment of a state 1 of a single-to-double joint of the present application;

[0032] Figure 3It is a cross-sectional structural schematic diagram of one embodiment of state 2 of a single-to-double joint of the present application;

[0033] Figure 4 It is a cross-sectional structural schematic diagram of one implementation mode of state three of a single-to-double joint of the present application;

[0034] Figure 5 This is a schematic cross-sectional structural diagram of one embodiment of a single-joint to double-joint elastic rubber plug of the present application;

[0035] Figure 6 This is a schematic cross-sectional structure diagram of one embodiment of a single-to-double joint of the present application;

[0036] Figure 7 This is a schematic structural diagram of one embodiment of an infusion set assembly of the present application;

[0037] Indications in the figure: 1-first infusion tube, 2-second infusion tube, 3-third infusion tube, 4-control valve, 5-conical puncture head, 6-elastic rubber plug, 7-bottle plug puncture device of infusion set, 11-convex strip, 41-valve stem, 61-insertion section, 62-external section, 63-groove. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0039] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] Example 1: See Figures 1 to 6 As shown,

[0044] The present embodiment provides a single-to-double connector, comprising a first infusion tube 1, a second infusion tube 2, a third infusion tube 3 and a control valve 4, wherein one end of the first infusion tube 1 is connected to the control valve 4, and the other end is used to be connected to the infusion set, one end of the second infusion tube 2 is connected to the control valve 4, and the other end is used to be connected to the infusion bottle, and one end of the third infusion tube 3 is connected to the control valve 4, and the other end is used to be connected to the infusion bottle;

[0045] The conversion valve is used to switch the on-off state between the first infusion tube 1, the second infusion tube 2 and the third infusion tube 3, and the on-off state includes three states:

[0046] State 1: the first infusion tube 1 is connected to the second infusion tube 2, and the first infusion tube 1 is disconnected from the third infusion tube 3;

[0047] State 2: the first infusion tube 1 is connected to the third infusion tube 3, and the first infusion tube 1 is disconnected from the second infusion tube 2;

[0048] State three: the first infusion tube 1 is disconnected from the second infusion tube 2 , and the first infusion tube 1 is disconnected from the third infusion tube 3 .

[0049] In this embodiment, the control valve 4 is adjusted to state three, and then the second infusion tube 2 and the third infusion tube 3 are connected to different infusion bottles respectively, and then one end of the infusion device is connected to the first infusion tube 1, and the other end is connected to the patient, and the control valve 4 is adjusted to state one to achieve the connection between the first infusion tube 1 and the second infusion tube 2. After the liquid in the infusion bottle connected to the second infusion tube 2 is transported, the control valve 4 is adjusted to state two to achieve the connection between the first infusion tube 1 and the third infusion tube 3, and the liquid in the infusion bottle connected to the third infusion tube 3 is continued to be transported to the patient. After the medical staff adjusts the control valve 4 to state one, they can temporarily leave. When the liquid in the infusion bottle connected to the second infusion tube 2 is transported, the patient or the accompanying family member can adjust the control valve 4 to state two by themselves, and continue to transport the liquid in the infusion bottle connected to the third infusion tube 3 The liquid in the connected infusion bottle is delivered to the patient's body. After adjusting the control valve 4 to state 2, the patient or the accompanying family member can notify the medical staff, and the medical staff can bring a new infusion bottle to directly replace the infusion bottle connected to the second infusion tube 2. In this way, the medical staff can avoid waiting at the patient's bedside, avoid wasting the medical staff's time, and improve the work efficiency of the medical staff. At the same time, it takes a certain amount of time to complete the delivery of the liquid in the infusion bottle connected to the third infusion tube 3. During this process, after the patient or the accompanying family member notifies the medical staff, even if the medical staff has other matters on hand and cannot leave temporarily, due to the continuous delivery of the liquid in the infusion bottle connected to the third infusion tube 3, the patient's blood is prevented from flowing back into the infusion tube, further forming a thrombus to block the infusion tube, which is conducive to the sustainable implementation of infusion therapy.

[0050] As a preferred embodiment, based on the above-mentioned method, further, one end of the second infusion tube 2 and the third infusion tube 3 connected to the infusion bottle is provided with a conical puncture head 5, and the conical puncture head 5 is used to puncture the stopper of the infusion bottle.

[0051] The conical puncture head 5 is equivalent to the bottle stopper puncture head 7 of the infusion set, and its use conforms to the routine operation of medical staff. The above structure is simple to operate, convenient for medical staff to use, and conducive to improving the work efficiency of medical staff.

[0052] As a preferred embodiment, on the basis of the above-mentioned manner, further, the surfaces of the second infusion tube 2 and the third infusion tube 3 are provided with different colors for distinguishing the second infusion tube 2 and the third infusion tube 3 .

[0053] Different colors are set on the surface of the second infusion tube 2 and the third infusion tube 3 to distinguish the second infusion tube 2 and the third infusion tube 3, and further to distinguish different infusion bottles connected to the second infusion tube 2 and the third infusion tube 3. For patients who need to deliver multiple liquids with different components, they may need to be infused in a sequential order. The above structure is convenient for medical staff and patients to distinguish, increases the safety of infusion, and is beneficial to the treatment of patients.

[0054] As a preferred embodiment, on the basis of the above-mentioned manner, further, the control valve 4 includes a valve stem 41, the valve stem 41 is L-shaped, and the directions of the valve stem 41 correspond to three different on-off states;

[0055] In state 1, the valve stem 41 points to the second infusion tube 2;

[0056] In state 2, the valve stem 41 points to the third infusion tube 3;

[0057] In state three, the valve stem 41 points to the area between the second infusion tube 2 and the third infusion tube 3 .

[0058] The corresponding on-off state is adjusted by adjusting the direction of the valve stem 41 to correspond to different structures. The above structure is simple and easy to operate, which improves the flexibility of the single-to-double joint of the present application.

[0059] As a preferred embodiment, on the basis of the above-mentioned method, further, an elastic rubber plug 6 is provided at one end of the first infusion tube 1 for connecting with the infusion set, and the elastic rubber plug 6 is used to seal the first infusion tube 1, and the bottle plug piercer 7 of the infusion set can pierce the elastic rubber plug 6 and connect with the first infusion tube 1.

[0060] The elastic rubber plug 6 is used, on the one hand, to seal the first infusion tube 1 to prevent the external environment from polluting the inside of the first infusion tube 1, and on the other hand, to connect with the bottle plug piercer 7 of the infusion set, thereby ensuring the connection between the infusion set and the first infusion tube 1, and at the same time sealing the connection, thereby reducing the risk of liquid leakage from the connection and improving the reliability of the single-to-double connector of the present application.

[0061] As a preferred embodiment, on the basis of the above method, further, the elastic rubber plug 6 includes an insertion section 61 and an external section 62, the size of the insertion section 61 is adapted to the inner wall size of the first infusion tube 1, and the size of the external section 62 is larger than the outer wall size of the first infusion tube 1.

[0062] The size of the insertion section 61 is adapted to the inner wall size of the first infusion tube 1, ensuring that the insertion section 61 can be inserted into the first infusion tube 1 and has good sealing performance. The size of the external section 62 is larger than the outer wall size of the first infusion tube 1, so that when the bottle stopper piercer 7 of the infusion set is inserted, the elastic rubber stopper 6 will not move with the insertion of the bottle stopper piercer 7 of the infusion set, ensuring that the bottle stopper piercer 7 of the infusion set can pierce the elastic rubber stopper 6 and connect with the first infusion tube 1, thereby improving the reliability of the single-to-double connector of the present application.

[0063] As a preferred embodiment, on the basis of the above-mentioned manner, further, a groove 63 is provided on the insertion section 61 , and a convex strip 11 is provided on the inner wall of the first infusion tube 1 , and the groove 63 is adapted to the convex strip 11 .

[0064] After the bottle stopper piercer 7 of the infusion set is inserted into the elastic rubber plug 6, the connection between the bottle stopper piercer 7 and the elastic rubber plug 6 of the infusion set is maintained due to the mutual squeezing action between the bottle stopper piercer 7 and the elastic rubber plug 6, thereby ensuring the connection between the infusion set and the first infusion tube 1. When the infusion set is dragged, if it is accidentally touched by others or the patient drags it unconsciously, there is a risk that the infusion set drives the elastic rubber plug 6 to move and the elastic rubber plug 6 is disconnected from the first infusion tube 1. The arrangement of the groove 63 and the convex strip 11 structure prevents the elastic rubber plug 6 from being disconnected from the first infusion tube 1, thereby improving the reliability of the single-to-double connector of the present application.

[0065] As a preferred embodiment, based on the above method, further, the convex strip 11 is arranged at an angle, the inclination direction of the convex strip 11 is in the same direction as the insertion direction of the elastic plug 6 , and the inclination direction of the groove 63 is adapted to the inclination direction of the convex strip 11 .

[0066] By adopting the above structure, on the one hand, when the bottle stopper piercer 7 of the infusion set is inserted into the elastic rubber stopper 6, the resistance during insertion is reduced, which is conducive to the insertion of the bottle stopper piercer 7 of the infusion set; on the other hand, when the bottle stopper piercer 7 of the infusion set is subjected to an external force and there is a risk of being pulled outward and driving the elastic rubber stopper 6 to move, the obliquely arranged convex strip 11 increases the resistance of the elastic rubber stopper 6 to be separated from the connection with the first infusion tube 1, further reducing the risk of the elastic rubber stopper 6 being separated from the connection with the first infusion tube 1, and improving the reliability of the single-to-double connector of the present application.

[0067] As a preferred embodiment, based on the above method, further, the number of the ridges 11 is multiple, and the multiple ridges 11 are spaced apart along the insertion direction of the elastic plug 6 , and the number of the grooves 63 is adapted to the number of the ridges 11 .

[0068] The arrangement of the multiple ridges 11 ensures that when the bottle plug piercer 7 of the infusion set is subjected to an external force and there is a risk of being pulled outward and driving the elastic rubber plug 6 to move, as the elastic rubber plug 6 moves outward, the resistance to be overcome becomes greater and greater until the elastic rubber plug 6 stops moving outward. In this way, even if the elastic rubber plug 6 moves outward a certain distance, the connection between the elastic rubber plug 6 and the first infusion tube 1 can still be maintained, thereby improving the reliability of the single-to-double connector of the present application. At the same time, the arrangement of the multiple ridges 11 has a buffering effect on the bottle plug piercer 7 of the infusion set being pulled out, thereby reducing the risk of the infusion set being pulled off, and facilitating the sustainable implementation of infusion therapy.

[0069] Example 2: See Figure 7 As shown,

[0070] This embodiment also provides an infusion set assembly, which adopts a single-to-double connector as described in the previous embodiment, which increases the flexibility of the use of the infusion set assembly, avoids wasting the time of medical staff, is conducive to improving the work efficiency of medical staff, and is conducive to the sustainable implementation of infusion therapy.

[0071] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A single-to-double joint, characterized in that: It includes a first infusion tube, a second infusion tube, a third infusion tube and a control valve, wherein one end of the first infusion tube is connected to the control valve, and the other end is used to be connected to the infusion set, one end of the second infusion tube is connected to the control valve, and the other end is used to be connected to the infusion bottle, and one end of the third infusion tube is connected to the control valve, and the other end is used to be connected to the infusion bottle; The control valve is used to switch the on-off state between the first infusion tube, the second infusion tube and the third infusion tube, and the on-off state includes three states: State 1: the first infusion tube is connected to the second infusion tube, and the first infusion tube is disconnected from the third infusion tube; State 2: the first infusion tube is connected to the third infusion tube, and the first infusion tube is disconnected from the second infusion tube; State three: the first infusion tube is disconnected from the second infusion tube, and the first infusion tube is disconnected from the third infusion tube.

2. A single-to-double joint as claimed in claim 1, characterized in that: One end of the second infusion tube and the third infusion tube used for being connected to the infusion bottle is provided with a conical puncture head, and the conical puncture head is used for puncturing the rubber stopper of the infusion bottle.

3. A single-to-double joint as claimed in claim 2, characterized in that: The surfaces of the second infusion tube and the third infusion tube are provided with different colors for distinguishing the second infusion tube from the third infusion tube.

4. A single-to-double joint as claimed in claim 3, characterized in that: The control valve comprises a valve stem, the valve stem is L-shaped, and the directions of the valve stem correspond to three different on-off states; In state 1, the valve stem points to the second infusion tube; In state 2, the valve stem points to the third infusion tube; In state three, the valve stem points to the area between the second infusion tube and the third infusion tube.

5. A single-to-double joint according to any one of claims 1 to 4, characterized in that: An elastic rubber plug is arranged at one end of the first infusion tube for connecting with the infusion set, and the elastic rubber plug is used to block the first infusion tube. The bottle plug piercer of the infusion set can pierce the elastic rubber plug and connect with the first infusion tube.

6. A single-to-double joint as claimed in claim 5, characterized in that: The elastic rubber plug comprises an insertion section and an external section. The size of the insertion section matches the size of the inner wall of the first infusion tube, and the size of the external section is larger than the size of the outer wall of the first infusion tube.

7. A single-to-double joint as claimed in claim 6, characterized in that: The inserting section is provided with a groove, the inner wall of the first infusion tube is provided with a convex strip, and the groove is adapted to the convex strip.

8. A single-to-double joint as claimed in claim 7, characterized in that: The convex strip is arranged obliquely, and the inclination direction of the convex strip is the same as the insertion direction of the elastic rubber plug, and the inclination direction of the groove is adapted to the inclination direction of the convex strip.

9. A single-to-double joint as claimed in claim 8, characterized in that: The number of the convex strips is multiple, and the multiple convex strips are spaced apart along the insertion direction of the elastic rubber plug, and the number of the grooves is adapted to the number of the convex strips.

10. An infusion set assembly, characterized in that: It comprises a single-to-double joint as described in any one of claims 1-9.

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