Novel needleless infusion connector

Abstract

The utility model relates to the technical field of manufacturing of medical instruments, in particular to a novel needleless infusion connector which is reasonable in structure, reliable in sealing and capable of effectively preventing chippings from invading an inner cavity in the product assembling process, and is characterized in that the outer wall of a cylindrical supporting part of a lower shell is attached to the inner wall of the lower end of an upper shell; a matched step structure is further arranged between the lower shell and the upper shell, the step structure comprises a first annular boss and a second annular boss which are located on the outer side of the bottom of the cylindrical supporting part in the lower shell, the first annular boss is arranged around the circumferential face of the cylindrical supporting part, and the second annular boss is arranged around the lower end of the first annular boss; and the lower end surface of the upper shell is provided with a first contact part and a second contact part which are respectively opposite to the first annular boss and the second annular boss.

Description

Technical Field:

[0001] The utility model relates to the technical field of medical device manufacturing, and specifically relates to a novel needleless infusion connector with reasonable structure, reliable sealing, and capable of effectively avoiding debris intrusion into the inner cavity during the product assembly process. Background Art:

[0002] The needleless closed infusion connector is applied to the end sealing of CVC (central venous catheter), PICC (peripherally inserted central catheter), and indwelling needle catheter. When the infusion device is connected to the needleless closed infusion connector, a closed infusion channel is formed; after the infusion device is pulled out, the needleless closed infusion connector is in a closed state to avoid gas and external pollution sources from entering the infusion catheter. Common needleless closed infusion connector products on the existing market are as shown in the appendix Figure 1 and include an upper shell and a lower shell connected as a whole. After the upper shell and the lower shell are fixedly connected, a cavity is formed between them, and an infusion valve assembly is arranged in the cavity. During the production and manufacturing process, the upper shell and the lower shell are fixedly connected by high-frequency welding. During welding, debris will be generated on the contact surface between the lower edge of the upper shell and the outer edge of the upper end of the lower shell during the processing, and the debris is likely to enter the cavity and cause pollution, affecting the product quality. Summary of the Invention:

[0003] The utility model aims at the defects and deficiencies existing in the prior art, and provides a novel needleless infusion connector with reasonable structure, simple processing, reliable sealing, and capable of effectively avoiding debris intrusion into the inner cavity during the product assembly process.

[0004] The utility model is achieved by the following measures:

[0005] A novel needleless infusion connector is provided with an upper shell and a lower shell. The upper shell and the lower shell are connected to form a main cavity, and an infusion valve is arranged in the main cavity. The upper end of the lower shell is provided with a cylindrical support portion coaxially arranged with the lower shell and extending into the upper shell, and the upper end of the cylindrical support portion is in contact with the bottom end of the infusion valve. The characteristic is that the outer wall of the cylindrical support portion of the lower shell is attached to the inner wall of the lower end of the upper shell, and a matching stepped structure is also arranged between the lower shell and the upper shell. The stepped structure includes a first annular boss and a second annular boss located outside the bottom of the cylindrical support portion of the lower shell. The first annular boss is arranged around the circumferential surface of the cylindrical support portion, and the second annular boss is arranged around the lower end of the first annular boss. The lower end surface of the upper shell is provided with a first contact portion and a second contact portion respectively opposite to the first annular boss and the second annular boss.

[0006] In the present utility model, the position of the second annular boss on the lower housing is lower than that of the first annular boss. The first contact portion on the lower end surface of the upper housing is in contact with the upper surface of the first annular boss. The second contact portion is arranged outside the first contact portion and is oppositely arranged with the second annular boss, and there is a gap between the second contact portion and the second annular boss.

[0007] There is a gap between the first contact portion of the upper housing and the first annular boss in the present utility model. Among them, the gap is realized by opening a groove on the surface of the first contact portion or the surface of the first annular boss. Preferably, a V-shaped groove is opened on the surface of the first contact portion.

[0008] In the production and manufacturing process of the present utility model, the upper housing and the lower housing are inserted into the lower end of the upper housing through the cylindrical support portion on the lower housing to complete the basic connection. The stepped structure at the joint of the upper housing and the lower housing can ensure that the debris generated during the high-frequency welding process does not enter the main cavity formed by the buckling of the upper and lower housings. This is because the main cavity is formed by the cylindrical support portion of the lower housing, and the welding treatment position is located outside the lower end of the cylindrical support portion, completely isolating the welding part in the outer area of the main cavity. And through the gap in the stepped structure of the welding part, the accommodation of filamentous and flocculent debris during high-frequency welding can be completed.

[0009] Compared with the prior art, the present utility model has the remarkable advantages of reasonable structure, reliable sealing, and can effectively improve the product quality. Description of the drawings:

[0010] Attached Figure 1 is a schematic structural diagram of a needleless infusion connector in the prior art.

[0011] Attached Figure 2 is a schematic structural diagram of the present utility model.

[0012] Attached Figure 3 is a schematic partial structural diagram of the present utility model.

[0013] Reference numerals: upper housing 1, lower housing 2, main cavity 3, infusion valve 4, cylindrical support portion 5, first annular boss 6, second annular boss 7, first contact portion 8, second contact portion 9, gap 10. Detailed implementation manners:

[0014] The following will further illustrate the present utility model in conjunction with the drawings and embodiments.

[0015] As attached Figure 2As shown in the figure, the present utility model proposes a novel needleless infusion connector, which is provided with an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are connected to form a main cavity 3. An infusion valve 4 is arranged in the main cavity 3. The upper end of the lower shell 2 is provided with a cylindrical support part 5 which is coaxially arranged with the lower shell 2 and extends into the upper shell 1. The upper end of the cylindrical support part 5 is in contact with the bottom end of the infusion valve 4. The outer wall of the cylindrical support part 5 of the lower shell 2 is attached to the inner wall of the lower end of the upper shell 1. A matching stepped structure is also arranged between the lower shell 2 and the upper shell 1. The stepped structure includes a first annular boss 6 and a second annular boss 7 located outside the bottom of the cylindrical support part 5 in the lower shell 2. The first annular boss 6 is arranged around the circumferential surface of the cylindrical support part 5, and the second annular boss 7 is arranged around the lower end of the first annular boss 6. The lower end surface of the upper shell 1 is provided with a first contact part 8 and a second contact part 9 which are respectively opposite to the first annular boss 6 and the second annular boss 7.

[0016] In the present utility model, the position of the second annular boss 7 on the lower shell 2 is lower than that of the first annular boss 6. The upper surface of the first contact part 8 on the lower end surface of the upper shell 1 is in contact with the upper surface of the first annular boss 6. The second contact part 9 is arranged outside the first contact part 8 and is opposite to the second annular boss 7. There is a gap between the second contact part 9 and the second annular boss 7.

[0017] There is a gap 10 between the first contact part 8 of the upper shell 1 of the present utility model and the first annular boss 6. Among them, the gap 10 is realized by opening a groove on the surface of the first contact part or the surface of the first annular boss. Preferably, a V-shaped groove is opened on the surface of the first contact part 8.

[0018] Embodiment:

[0019] In this example, a novel needleless infusion connector is proposed, which is provided with an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are connected to form a main cavity 3. An infusion valve 4 is arranged in the main cavity 3. The upper end of the lower shell 2 is provided with a cylindrical support part 5 which is coaxially arranged with the lower shell 2 and extends into the upper shell 1. The upper end of the cylindrical support part 5 is in contact with the bottom end of the infusion valve 4. The outer wall of the cylindrical support part 5 of the lower shell 2 is attached to the inner wall of the lower end of the upper shell 1. A matching stepped structure is also arranged between the lower shell 2 and the upper shell 1. The stepped structure includes a first annular boss 6 and a second annular boss 7 located outside the bottom of the cylindrical support part 5 in the lower shell 2. The first annular boss 6 is arranged around the circumferential surface of the cylindrical support part 5, and the second annular boss 7 is arranged around the lower end of the first annular boss 6. The lower end surface of the upper shell 1 is provided with a first contact part 8 and a second contact part 9 which are respectively opposite to the first annular boss 6 and the second annular boss 7;

[0020] In this example, the position of the second annular boss 7 on the lower housing 2 is lower than that of the first annular boss 6. The first contact portion 8 on the lower end surface of the upper housing 1 is in contact with the upper surface of the first annular boss 6. The second contact portion 9 is arranged outside the first contact portion 8 and is disposed opposite to the second annular boss 7. There is a gap between the second contact portion 9 and the second annular boss 7.

[0021] In this example, there is a gap 10 between the first contact portion 8 of the upper housing 1 and the first annular boss 6. Among them, the gap 10 is realized by opening a groove on the surface of the first contact portion or the surface of the first annular boss. Preferably, a V-shaped groove is opened on the surface of the first contact portion 8.

[0022] During the production and manufacturing process, the upper housing 1 and the lower housing 2 are inserted into the lower end of the upper housing 1 through the cylindrical support portion 5 on the lower housing 2 to complete the basic connection. The stepped structure at the joint of the upper housing 1 and the lower housing 2 can ensure that the debris generated during the high-frequency welding process will not enter the main cavity 3 formed by the buckling of the upper and lower housings. This is because the main cavity is formed by the cylindrical support portion 5 of the lower housing 2, and the welding treatment position is located outside the lower end of the cylindrical support portion 5, completely isolating the welding part in the outer area of the main cavity 3. And through the gap in the stepped structure of the welding part, the accommodation of filamentous and flocculent debris during high-frequency welding can be completed.

[0023] Compared with the prior art, the utility model has the remarkable advantages of reasonable structure, reliable sealing, and can effectively improve the product quality.

Claims

1. A novel needleless infusion connector is provided with an upper shell and a lower shell. The upper shell and the lower shell are connected to form a main cavity. An infusion valve is arranged in the main cavity. The upper end of the lower shell is provided with a cylindrical support part that is coaxially arranged with the lower shell and extends into the upper shell. The upper end of the cylindrical support part is in contact with the bottom end of the infusion valve, and it is characterized in that The outer wall of the cylindrical support part of the lower housing fits against the inner wall at the lower end of the upper housing. A matching stepped structure is also provided between the lower housing and the upper housing. The stepped structure includes a first annular boss and a second annular boss located outside the bottom of the cylindrical support part in the lower housing. The first annular boss is arranged around the circumferential surface of the cylindrical support part, and the second annular boss is arranged around the lower end of the first annular boss. The lower end surface of the upper housing is provided with a first contact part and a second contact part that are respectively opposite to the first annular boss and the second annular boss.

2. The novel needleless infusion connector according to claim 1, characterized in that, The position of the second annular boss on the lower housing is lower than that of the first annular boss. The first contact part on the lower end surface of the upper housing is in contact with the upper surface of the first annular boss. The second contact part is arranged outside the first contact part and is opposite to the second annular boss. There is a gap between the second contact part and the second annular boss.

3. A novel needleless infusion connector according to claim 1, characterized in that, There is a gap between the first contact part of the upper housing and the first annular boss. Among them, the gap is realized by opening a groove on the surface of the first contact part or the surface of the first annular boss.

4. A novel needleless infusion connector according to claim 3, characterized in that, A V-shaped groove is opened on the surface of the first contact part.

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