Disposable dialysis indwelling needle exhaust structure

Abstract

Provided is a disposable dialysis indwelling needle exhaust structure, comprising: an exhaust connector (10), an exhaust membrane (20) and a pressing unit (30), wherein the exhaust connector is hollow and comprises a main body and an extension protruding from the main body; the main body is cylindrical and forms a receiving cavity for accommodating the pressing unit, the extension forms a channel, the channel is connected to the receiving cavity, and its inner diameter is smaller than the inner diameter of the bottom of the receiving cavity, thereby forming a step at the bottom of the receiving cavity, a snap-fit ​​groove is formed on the side wall, and an annular sealing groove is formed on the table surface of the step; the exhaust membrane is arranged at the bottom of the receiving cavity; the pressing unit is formed into a hollow cylindrical shape and has an appearance basically consistent with the receiving cavity, including a snap-fit ​​protrusion formed on the side wall and an annular sealing protrusion formed on the bottom, thereby the pressing unit can be snapped into the receiving cavity, so that the exhaust membrane is fixed between the pressing unit and the exhaust connector.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and more specifically to an exhaust structure of a disposable dialysis indwelling needle. Background Art

[0002] In clinical practice, the dialysis indwelling needle is used for blood vessel puncture and connected to the blood circuit for hemodialysis. The product will have an exhaust component, including an exhaust connector and an exhaust membrane. This component is used to exhaust air after blood vessel puncture, and observe the blood return to help nurses judge the success of the puncture. The special function of the exhaust membrane is that it is breathable and liquid-impermeable. After the puncture is successful, the air will be discharged through the exhaust membrane, and the blood will not leak through the exhaust membrane. In the prior art, this component is a welded structure, and the exhaust membrane and the exhaust connector are welded by a welding machine to prevent the filter membrane from falling off.

[0003] However, the above products have the following shortcomings: 1. The welding part between the exhaust joint and the exhaust membrane is small in size and difficult to operate and process; 2. The welding process requires the purchase of additional equipment, which is an additional economic burden for small businesses.

[0004] Therefore, new technologies and products are needed to at least partially solve the problems existing in the prior art. Summary of the invention

[0005] To this end, the present invention provides a disposable dialysis indwelling needle exhaust structure, which is used to at least partially solve the problems existing in the above-mentioned prior art, such as difficult processing and high cost.

[0006] According to one aspect of the present invention, a disposable dialysis indwelling needle exhaust structure is provided, comprising: an exhaust connector 10, an exhaust membrane 20 and a pressing unit 30.

[0007] The exhaust joint 10 is hollow and includes a main body 11 and an extension 12 protruding from the main body; the main body 11 is cylindrical and is formed with a receiving cavity 110 for receiving the pressing unit 30; the extension 12 is formed with a channel 120, which is connected to the receiving cavity 110 and has an inner diameter smaller than the inner diameter of the bottom of the receiving cavity 110, thereby forming a step 111 at the bottom of the receiving cavity 110, a snap-fit ​​groove 112 is formed on the side wall of the receiving cavity 110, and an annular sealing groove 113 is formed on the table of the step 111;

[0008] The exhaust membrane 20 is arranged at the bottom of the accommodating cavity 110; the pressing unit 30 is formed into a hollow cylindrical shape, having an appearance basically consistent with the accommodating cavity 110, including a snap-fit ​​protrusion 31 formed on the side wall and matching with the snap-fit ​​groove 112 and an annular sealing protrusion 32 formed on the bottom and matching with the annular sealing groove 113, so that the pressing unit 30 can be snapped into the accommodating cavity 110, so that the exhaust membrane 20 is fixed between the pressing unit 30 and the exhaust joint 10.

[0009] Preferably, a plurality of through holes 33 are formed at the bottom of the pressing unit 30 .

[0010] Preferably, at least one pressing strip 34 is formed at the bottom of the pressing unit 30 .

[0011] Preferably, an anti-slip rack 13 is formed on the outer wall of the exhaust joint 10 .

[0012] According to another aspect of the present invention, there is also provided a disposable dialysis indwelling needle, characterized in that it comprises the exhaust structure according to the present invention.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The exhaust joint and the exhaust membrane are fixed by pressing, which is easy to operate and process;

[0015] 2. Eliminating the welding process does not require the purchase of additional equipment, which can save some expenses for small businesses and thus reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the structure of the exhaust structure of the disposable dialysis indwelling needle according to an embodiment of the present invention;

[0017] Figure 2 , 3 4 and 5 are respectively a front view, a cross-sectional view and a top view of an exhaust connector of an exhaust structure of a disposable dialysis indwelling needle according to an embodiment of the present invention;

[0018] Figure 5 , 6 7 and 8 are respectively the front view, the cross-sectional view and the top view of the compression unit of the exhaust structure of the disposable dialysis indwelling needle according to the embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention can be better understood according to the following examples. However, it is easy for those skilled in the art to understand that the contents described in the examples are only used to illustrate the present invention, and should not and will not limit the present invention described in detail in the claims.

[0020] Figure 1 It is a schematic cross-sectional view of the structure of the exhaust structure of the disposable dialysis indwelling needle according to an embodiment of the present invention; Figure 2 , 3 4 and 5 are respectively a front view, a cross-sectional view and a top view of an exhaust connector of an exhaust structure of a disposable dialysis indwelling needle according to an embodiment of the present invention; Figure 5 , 6 7 and 8 are respectively the front view, the cross-sectional view and the top view of the compression unit of the exhaust structure of the disposable dialysis indwelling needle according to the embodiment of the present invention.

[0021] like Figure 1 As shown, the exhaust structure of the disposable dialysis indwelling needle of the present invention may include an exhaust connector 10 , an exhaust membrane 20 and a pressing unit 30 .

[0022] refer to Figure 2-4 The exhaust joint 10 may include two parts, namely a main body 11 and an extension 12 protruding from the main body, both of which are formed into a hollow cylindrical shape that is interconnected, wherein a receiving cavity 110 for receiving the pressing unit 30 is formed in the main body 11, and a snap-fit ​​groove 112 is formed on the side wall of the receiving cavity 110. The snap-fit ​​groove 112 may be formed as an annular groove on the side wall, or a groove may be formed on a part of the side wall. An anti-slip rack may be formed on the outer wall of the main body 11 to prevent sliding and facilitate operation.

[0023] The hollow part of the extension part 12 constitutes a channel 120, which is connected to the accommodating cavity 110, and the inner diameter of the channel 120 is smaller than the inner diameter of the bottom of the accommodating cavity 110, thereby forming a step 111 at the bottom of the accommodating cavity 110, and an annular sealing groove 113 is formed on the table surface of the step 111. The above-mentioned engaging groove 112 and the annular sealing groove 113 match the corresponding structure of the pressing unit 30 described later.

[0024] refer to Figure 5-7 The pressing unit 30 is formed into a hollow cylindrical shape, having a shape substantially consistent with the accommodating cavity 110, including a snap-fitting protrusion 31 formed on the side wall and matched with the snap-fitting groove 112, and an annular sealing protrusion 32 formed on the bottom and matched with the annular sealing groove 113. A through hole 33 is formed at the bottom of the pressing unit 30, and the through hole can be one or more. If it is formed as a plurality of through holes, one or more beading strips 34 can be formed on the bottom, thereby dividing a large through hole into a plurality of small through holes. The beading strip can also play a supporting role for the exhaust membrane 20.

[0025] The pressing unit 30 and the exhaust connector 10 can be made of medical plastic material with a certain elasticity. Therefore, the pressing unit 30 can be pressed into the accommodating cavity 110 of the exhaust connector 10 by applying pressure, so that the snap-fit ​​protrusion 31 cooperates with the snap-fit ​​groove 112, thereby fixing the pressing unit 30 in the accommodating cavity 110.

[0026] During assembly, the exhaust membrane 20 is first set on the bottom of the accommodating cavity 110, and then the pressing unit 30 is fixed in the accommodating cavity 110, so that the annular sealing protrusion 32 fits in the annular sealing groove 113, and the exhaust membrane 20 is sealed and fixed between the pressing unit 30 and the exhaust joint 10 to prevent liquid leakage.

[0027] When in use, the exhaust structure of the present invention can be installed in a disposable dialysis indwelling needle.

[0028] Specific implementation methods are given above, but the present invention is not limited to the implementation methods described above. The basic idea of ​​the present invention lies in the above basic scheme. For ordinary technicians in this field, it does not take creative work to design various deformed models, formulas, and parameters according to the teachings of the present invention. Changes, modifications, substitutions, and deformations of the implementation methods without departing from the principles and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A disposable dialysis indwelling needle exhaust structure, characterized in that: include: An exhaust joint (10), an exhaust membrane (20) and a pressing unit (30), The exhaust joint (10) is hollow and comprises a main body (11) and an extension (12) protruding from the main body; the main body (11) is cylindrical and is formed with a receiving cavity (110) for receiving the pressing unit (30); the extension (12) is formed with a channel (120), the channel (120) is communicated with the receiving cavity (110), and its inner diameter is smaller than the inner diameter of the bottom of the receiving cavity (110), thereby forming a step (111) at the bottom of the receiving cavity (110); a locking groove (112) is formed on the side wall of the receiving cavity (110), and an annular sealing groove (113) is formed on the table surface of the step (111); The exhaust membrane (20) is arranged at the bottom of the accommodating cavity (110); the pressing unit (30) is formed into a hollow cylindrical shape and has an appearance basically consistent with the accommodating cavity (110), including a snap-fitting protrusion (31) formed on the side wall and matching with the snap-fitting groove (112) and an annular sealing protrusion (32) formed on the bottom and matching with the annular sealing groove (113), so that the pressing unit (30) can be snap-fitted into the accommodating cavity (110), so that the exhaust membrane (20) is fixed between the pressing unit (30) and the exhaust joint (10).

2. The exhaust structure of the disposable dialysis indwelling needle according to claim 1, characterized in that: A plurality of through holes (33) are formed at the bottom of the pressing unit (30).

3. The exhaust structure of the disposable dialysis indwelling needle according to claim 1, characterized in that: At least one pressing strip (34) is formed at the bottom of the pressing unit (30).

4. The exhaust structure of the disposable dialysis indwelling needle according to claim 1, characterized in that: An anti-slip rack (13) is formed on the outer wall of the main body (11).

5. A disposable dialysis indwelling needle, characterized in that: Comprising the exhaust structure according to any one of claims 1-3.

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