Positive pressure needleless connector

Abstract

The utility model relates to a positive pressure needleless connector which comprises a connector shell, one end of the connector shell is provided with a first connector, and the other end of the connector shell is provided with a second connector. A medicine adding rubber plug is arranged in the connector shell, and the medicine adding rubber plug is made of an elastic material; the medicine adding rubber plug comprises a telescopic end, a telescopic connecting part, a telescopic main body and a joint connecting part; the telescopic main body is of a hollow structure, a plurality of annular grooves are formed in the hollow structure of the telescopic main body in the telescopic direction of the telescopic main body, an elastic telescopic structure is formed among the annular grooves, and when an infusion instrument is disconnected, the elastic telescopic structure rebounds to form positive pressure pulses, so that liquid medicine retention of the positive pressure needleless connector is reduced; the inner wall of the end, close to the second connector, of the connector shell is in a funnel shape, and when an infusion instrument is disconnected, the funnel-shaped structure accelerates the flowing speed of liquid medicine through positive pressure pulses formed by the elastic telescopic structure, retention of the liquid medicine is reduced, and therefore accurate-dose infusion to a patient is achieved.

Description

Technical Field

[0001] This utility model relates to a connector, and more particularly to a positive pressure pinless connector. Background Technology

[0002] When administering intravenous medications to patients in hospitals, connectors are typically used to transfer medications from one medical device to another, such as between an infusion set and an indwelling needle, or between a syringe and an infusion set when additional medication needs to be added during the infusion process. Positive pressure needleless connectors prevent contamination of the medication by needle puncture debris and also prevent accidental needle injury to medical staff. When disconnected, they generate positive pressure to prevent blockage due to backflow. However, existing positive pressure connectors may leave a small amount of medication residue during use, affecting the accuracy of the infusion dosage. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a positive pressure pinless connector.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a positive pressure pinless connector, including a connector housing, wherein a first connector head is provided at one end of the connector housing and a second connector head is provided at the other end;

[0005] The connector housing is provided with a medicated plug, which is made of an elastic material; the medicated plug includes a telescopic end, a telescopic connecting part, a telescopic body, and a connector connecting part; the telescopic end is sequentially connected to the telescopic connecting part, the telescopic body, and the connector connecting part.

[0006] The telescopic end is matched and set in the first connector. The telescopic end is provided with a liquid guiding groove. The telescopic body is a hollow structure. The hollow structure of the telescopic body is provided with multiple annular grooves along the telescopic direction of the telescopic body. There is a gap between adjacent annular grooves. The multiple annular grooves form an elastic telescopic structure.

[0007] The inner wall of the connector housing near the second connector is funnel-shaped; the diameter of the liquid outlet tube in the second connector decreases from the end connected to the connector housing to the other end; multiple guide strips are provided on the inner wall of the connector housing from the end with the first connector to the end with the second connector.

[0008] In a preferred embodiment of this invention, the dosing stopper is made of silicone.

[0009] In a preferred embodiment of the present invention, the liquid guiding groove is an arc-shaped groove, and the liquid guiding groove protrudes from the outer wall of the telescopic end towards the center line of the telescopic end.

[0010] In a preferred embodiment of the present invention, the connector housing is provided with a plurality of partition strips on one end near the second connector head, with a gap between adjacent partition strips, and the outer contour of each partition strip is a curved surface.

[0011] In a preferred embodiment of this invention, the outer contour of each guide bar is a curved surface.

[0012] In a preferred embodiment of this utility model, the funnel-shaped inner wall of the connector housing has a curved surface structure.

[0013] The beneficial effects of this invention are as follows: the elastic expansion structure formed between multiple annular grooves rebounds when the infusion device is disconnected, generating a positive pressure pulse and reducing drug retention in the positive pressure needleless connector; and the inner wall of the connector housing near the second connector head is funnel-shaped. When the infusion device is disconnected, the positive pressure pulse generated by the elastic expansion structure accelerates the flow of the drug, reducing drug retention and thus achieving precise dosage infusion for the patient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0016] Figure 3 yes Figure 2 Sectional view of AA;

[0017] Figure 4 This is a schematic diagram of the connection structure between the connector housing and the second connector head;

[0018] Figure 5 yes Figure 4 BB section view;

[0019] Figure 6 This is a schematic diagram of the separator protrusion structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the dosing stopper structure of this utility model. Figure 1 ;

[0021] Figure 8 This is a schematic diagram of the dosing stopper structure of this utility model. Figure 2 ;

[0022] Figure 9 yes Figure 8 CC section view;

[0023] Figure 10 This is a schematic diagram of the structure of the dosing plug inside the first connector;

[0024] Figure 11 yes Figure 10 DD section view;

[0025] In the figure: connector housing 1; guide strip 101; partition ridge 102; first connector 2; second connector 3; dosing plug 4; telescopic end 401; liquid guide groove 4011; telescopic connection part 402; telescopic body 403; annular groove 4031; connector connection part 404. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] like Figures 1 to 11 The positive pressure pinless connector shown includes a connector housing 1, wherein a first connector 2 is provided at one end of the connector housing 1 and a second connector 3 is provided at the other end;

[0029] The connector housing 1 is provided with a drug-filling plug 4, which is made of elastic material; the drug-filling plug 4 includes a telescopic end 401, a telescopic connecting part 402, a telescopic body 403, and a connector connecting part 404; the telescopic end 401 is sequentially connected to the telescopic connecting part 402, the telescopic body 403, and the connector connecting part 404.

[0030] The telescopic end 401 is matched and disposed inside the first connector 2. The telescopic end 401 is provided with a liquid guiding groove 4011. The telescopic body 403 is a hollow structure, and multiple annular grooves 4031 are provided inside the hollow structure of the telescopic body 403 along the telescopic direction of the telescopic body 403. There is a gap between adjacent annular grooves 4031, and multiple annular grooves 4031 form an elastic telescopic structure. The connector connection part 404 is disposed inside the connector housing near the end of the second connector 3.

[0031] The inner wall of the connector housing 1 near the second connector 3 is funnel-shaped; the diameter of the liquid outlet tube in the second connector 3 decreases from the end connected to the connector housing to the other end, which helps to guide the liquid to gather at the outlet and reduce liquid residue.

[0032] When using the positive pressure needleless connector of this utility model, firstly, two infusion devices are connected through the first connector 2 and the second connector 3 respectively. For example, the syringe is connected through the first connector 2 and the indwelling needle is connected through the second connector 3. Then, by pushing the syringe, the medicine in the syringe passes through the positive pressure needleless connector and the indwelling needle into the patient's body, thereby realizing the delivery of medicine to the patient. When the syringe is connected to the first connector 2, the syringe tip is inserted into the first connector 2, pushing the telescopic end 401 of the drug-adding stopper 2 into the connector housing 1. During the process of the telescopic end 401 being pushed and squeezed by the syringe tip, the telescopic end 401 squeezes the telescopic connecting part 402, the telescopic body 403, and the connector connecting part 404. The telescopic body 403 is a hollow structure, and multiple annular grooves 4031 are provided in the hollow structure of the telescopic body 403 along the telescopic direction of the telescopic body 403. An elastic telescopic structure is formed between the multiple annular grooves 4031. During the process of the telescopic body 403 being squeezed, the elastic telescopic structure formed between the multiple annular grooves 4031 stores energy. When the syringe finishes injecting the drug and the syringe is removed from the first connector 2, the elastic telescopic structure releases energy, the telescopic connector 401 resets, and the first connector is blocked. Positive pressure is formed in the connector housing 1, thereby effectively preventing backflow of blood after the syringe or other infusion device is removed.

[0033] In a preferred embodiment, the inner wall of the connector housing 1 is provided with multiple guide strips 101 from the end with the first connector to the end with the second connector; the outer contour of each guide strip 101 is a curved surface, and the outer contour of the curved surface is relatively smooth, which helps to reduce the adhesion of high viscosity liquid, thereby reducing the retention of liquid and improving the accurate dosage infusion to the patient.

[0034] The elastic expansion structure formed between multiple annular grooves 4031 rebounds and resets when the infusion device is disconnected, generating a positive pressure pulse to reduce drug retention in the positive pressure needleless connector. Furthermore, the inner wall of the connector housing 1 near the second connector 3 is funnel-shaped. When the infusion device is disconnected, the positive pressure pulse generated by the elastic expansion structure accelerates the flow of the drug, creating a clearing effect and reducing drug retention. Multiple guide strips 101 are provided on the inner wall of the connector housing 1 from the end with the first connector to the end with the second connector. These guide strips 101 divert and guide the injected liquid. The guide strips 101, in conjunction with the positive pressure pulse, help reduce drug turbulence, increase the flow rate, and reduce drug retention, thereby achieving precise dosage infusion for the patient.

[0035] As a preferred embodiment, the dosing stopper 4 in this application is made of medical-grade silicone, and the more wear-resistant medical-grade silicone material can extend the service life of the dosing stopper 4.

[0036] In a preferred embodiment, the liquid guiding groove 4011 in this application is an arc-shaped groove, and the liquid guiding groove 4011 protrudes from the outer wall of the telescopic end towards the center line of the telescopic end. The arc-shaped liquid guiding groove 4011 is beneficial to realize the rapid diversion of the liquid entering the connector housing 1 and reduce the residence time of the liquid in the connector housing 1.

[0037] In a preferred embodiment, the connector housing 1 has multiple separating protrusions 102 near the second connector head 3, with a gap between adjacent separating protrusions 102, and the outer contour of each separating protrusion 102 is curved. The separating protrusions 102 facilitate connection and fixation with the connector connection part 404, and the gap between adjacent separating protrusions 102 helps to achieve rapid diversion of the liquid medicine, increasing the speed at which the liquid medicine exits the connector housing 1 and reducing the retention of the liquid medicine within the connector housing 1.

[0038] In a preferred embodiment, the funnel-shaped inner wall of the connector housing 1 has a curved surface structure. The funnel-shaped structure combined with the curved surface reduces dead angles where liquids can remain, which helps to reduce the adhesion of high-viscosity liquids and reduce liquid retention.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A positive pressure needle-free connector, characterized by, Includes a connector housing (1), wherein one end of the connector housing (1) is provided with a first connector (2) and the other end is provided with a second connector (3); The connector housing (1) is provided with a dosing plug (4), which is made of elastic material; the dosing plug (4) includes a telescopic end (401), a telescopic connecting part (402), a telescopic body (403), and a connector connecting part (404); the telescopic end (401) is sequentially connected to the telescopic connecting part (402), the telescopic body (403), and the connector connecting part (404); The telescopic end (401) is matched and disposed in the first connector (2). The telescopic end (401) is provided with a liquid guide groove (4011). The telescopic body (403) is a hollow structure. The hollow structure of the telescopic body (403) is provided with multiple annular grooves (4031) along the telescopic direction of the telescopic body (403). There is a gap between adjacent annular grooves (4031). The multiple annular grooves (4031) form an elastic telescopic structure. The inner wall of the connector housing (1) near the second connector (3) is funnel-shaped; the diameter of the liquid outlet pipe in the second connector (3) decreases from the end connected to the connector housing to the other end.

2. The positive pressure pinless connector according to claim 1, characterized in that, The dosing stopper (4) is made of silicone.

3. The positive pressure needle-free connector of claim 1, wherein, The liquid guiding groove (4011) is an arc-shaped groove, and the liquid guiding groove (4011) protrudes from the outer wall of the telescopic end towards the center line of the telescopic end.

4. The positive pressure needle-free connector of claim 1, wherein, The connector housing (1) has multiple partition strips (102) on one end near the second connector (3), with a gap between adjacent partition strips (102), and the outer contour of each partition strip (102) is curved.

5. The positive pressure needle-free connector of claim 1, wherein, Multiple guide strips (101) are provided on the inner wall of the connector housing (1) from the end with the first connector to the end with the second connector; the outer contour of each guide strip (101) is a curved surface.

6. The positive pressure needle-free connector according to any one of claims 1-5, wherein, The funnel-shaped inner wall of the connector housing (1) has a curved surface structure.

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