CN218923570U - Anti-backflow positive pressure joint - Google Patents

Abstract

The utility model discloses an anti-reflux positive pressure connector, which comprises a positive pressure functional part and an anti-reflux part, wherein the positive pressure functional part comprises an upper shell and a positive pressure rubber cushion, the anti-reflux part comprises an anti-reflux rubber cushion and a lower shell, a guide seat is arranged between the positive pressure rubber cushion and the anti-reflux rubber cushion, the upper end of the positive pressure rubber cushion is embedded into the upper shell, the lower end of the positive pressure rubber cushion is sleeved on the upper end surface of the guide seat, the lower end surface of the anti-reflux rubber cushion is abutted against the upper end of the lower shell, the upper end surface of the anti-reflux rubber cushion abuts against the lower end of the guide seat, the anti-reflux rubber cushion comprises a rubber cushion ring and a rubber film arranged in the rubber cushion ring, and a notch is formed in the rubber film.

Description

Anti-backflow positive pressure joint

Technical Field

The utility model relates to an infusion device, in particular to an anti-reflux positive pressure connector.

Background

When the treatment of a patient needs to be infused for a plurality of times, a plurality of indwelling infusion apparatuses are generally used, and for the convenience of infusing liquid medicine, an infusion connector is connected to the indwelling apparatus connector. Among them, needleless infusion connectors are increasingly used in therapy due to their safety and convenience of use.

There are three kinds of needleless transfusion connectors in the market, namely a positive pressure connector, a zero pressure connector and a negative pressure connector. However, due to the negative pressure characteristic of the negative pressure connector, when the infusion device is connected and disconnected with the connector, negative pressure generated by the connector can cause blood to flow back into the indwelling device, so that the indwelling device is at risk of thrombus blockage. The zero-pressure connector has obvious advantages in the aspect of blood backflow compared with the negative-pressure connector, but the blood still has a small quantity of backflow, and a certain risk of blockage hidden danger exists. The positive pressure joint is characterized in that when the infusion apparatus is separated from the joint due to the positive pressure characteristic, the positive pressure generated in the joint can enable the liquid in the joint to flow to a human body, so that the risk of blood backflow is avoided. However, the positive pressure connector is not different from the common two-way connector in normal transfusion, and when the transfusion is completed, if the transfusion cannot be processed in time, the phenomenon of blood return can occur, which is not beneficial to the stability and treatment of patients.

Disclosure of Invention

The utility model aims to: the utility model aims to overcome the defects of the prior art and provide an anti-reflux positive pressure joint.

The technical scheme is as follows: the utility model discloses an anti-backflow positive pressure connector, which comprises a positive pressure functional part and an anti-backflow part, wherein the positive pressure functional part comprises an upper shell and a positive pressure rubber cushion, the anti-backflow part comprises an anti-backflow rubber cushion and a lower shell, a flow guide seat is arranged between the positive pressure rubber cushion and the anti-backflow rubber cushion, the upper end of the positive pressure rubber cushion is embedded into the upper shell, the lower end of the positive pressure rubber cushion is sleeved on the upper end face of the flow guide seat, the lower end face of the anti-backflow rubber cushion is abutted against the upper end of the lower shell, the upper end face of the anti-backflow rubber cushion abuts against the lower end of the flow guide seat, the anti-backflow rubber cushion comprises a rubber cushion ring and a rubber film arranged in the rubber cushion ring, and a notch is formed in the rubber film.

Preferably, the rubber pad ring comprises an elliptic rubber pad ring, the rubber membrane comprises an elliptic rubber membrane matched with the elliptic rubber pad ring, and the notch is arranged along the major axis direction of the elliptic rubber membrane.

Preferably, an anti-reflux valve which is connected with the elliptic rubber membrane integrally and is concave is arranged below the incision.

Preferably, the positive pressure rubber pad comprises a cylinder body and a plug arranged at the top end of the cylinder body, the outer edge of the plug is matched with the top of the inner wall of the upper shell, and a liquid storage cavity is formed in the side wall of the plug.

Compared with the prior art, the utility model has the following beneficial effects: the infusion device can effectively avoid the backflow phenomenon of the positive pressure connector in the infusion process, effectively reduce the problem of the blockage and embolism of the indwelling device, and simultaneously can provide a stable treatment environment for patients and avoid the occurrence of infusion instability of the patients.

Drawings

FIG. 1 is a schematic diagram showing a cross-sectional structure of an anti-reflux positive pressure connector according to the present utility model;

FIG. 2 is a schematic diagram showing a cross-sectional structure of an anti-reflux positive pressure connector according to the present utility model;

FIG. 3 is a schematic cross-sectional view of a positive pressure cushion in an anti-reflux positive pressure joint according to the present utility model;

FIG. 4 is a schematic diagram showing a cross-sectional structure of an anti-reflux rubber pad in an anti-reflux positive pressure joint according to the present utility model;

fig. 5 is a schematic diagram showing a cross-sectional structure of an anti-backflow rubber pad in an anti-backflow positive pressure connector.

In the figure: 1. an upper housing; 2. positive pressure rubber cushion; 21. a cylinder; 22. a plug; 23. a liquid storage cavity; 3. a diversion seat; 4. an anti-backflow rubber pad; 41. a rubber backing ring; 42. a rubber film; 43. a notch; 44. an anti-reflux valve; 5. and a lower housing.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; either directly, or indirectly, through intermediaries, may be in communication with each other, or may be in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

The utility model provides an anti-backflow positive pressure joint, including malleation functional part and anti-reflux portion, malleation functional part includes casing 1 and malleation cushion 2, anti-backflow portion includes anti-backflow cushion 4 and lower casing 5, be equipped with water conservancy diversion seat 3 between malleation cushion 2 and anti-backflow cushion 4, casing 1 is gone up in the embedding of malleation cushion 2 upper end, the lower extreme cup joints on water conservancy diversion seat 3 up end, anti-backflow cushion 4's lower terminal surface is contradicted in casing 5 upper end down, the up end supports the lower extreme of tight water conservancy diversion seat 3, anti-backflow cushion 4 includes rubber backing ring 41 and sets up the rubber membrane 42 in rubber backing ring 41, cut 43 has been seted up on the rubber membrane 42. The technical scheme has the advantages that the backflow phenomenon of the positive pressure connector in the infusion process can be effectively avoided, the problem of the tube blockage and embolism of the indwelling device is effectively reduced, and meanwhile, a stable treatment environment can be provided for a patient, so that the patient is prevented from being in infusion anxiety.

Specifically, the rubber pad ring 41 includes an elliptical rubber pad ring 41, the rubber membrane 42 includes an elliptical rubber membrane 42 matching the elliptical rubber pad ring 41, and the slit 43 is arranged along the major axis direction of the elliptical rubber membrane 42; a concave anti-reflux valve 44 which is integrally connected with the elliptic rubber membrane 42 is arranged below the incision 43; the positive pressure rubber cushion 2 comprises a cylinder 21 and a plug 22 arranged at the top end of the cylinder 21, the outer edge of the plug 22 is matched with the top of the inner wall of the upper shell 1, and a liquid storage cavity 23 is formed in the side wall of the plug 22.

When the infusion device is connected with the infusion connector, the luer cone head of the infusion device extrudes the positive pressure rubber pad 2 to compress the positive pressure rubber pad 2, at the moment, the plug 22 plugs the opening of the upper shell 1, part of liquid is sealed in the liquid storage cavity 23, air in the rubber pad is discharged through an exhaust hole at the bottom of the connector, and when the infusion device is separated from the connector, the positive pressure rubber pad 2 rebounds, the positive pressure rubber pad 2 recovers shape, and the outer wall of the plug 22 of the positive pressure rubber pad 2 extrudes the liquid stored in the liquid storage cavity 23 to generate positive pressure; the anti-reflux rubber cushion 4 and the lower shell 5 form an anti-reflux part, a notch 43 is arranged on the rubber film 42 in the anti-reflux rubber cushion 4, a concave anti-reflux valve 44 which is integrally connected with the elliptic rubber film 42 is arranged below the notch 43, the notch 43 is extruded by pressure and can be opened together with the anti-reflux valve 44, and as the structure of the notch 43 is concave downwards, the notch 43 can be opened at a lower pressure on the concave side, so that infusion liquid can pass through; on the convex side, a greater pressure is required to open the incision 43 and the anti-reflux valve 44. The connector can well complete transfusion and effectively play the function of anti-reflux through the opening pressure difference at the two sides of the anti-reflux valve 44.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature through an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is at a lower level than the second feature. In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example.

Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced equivalently; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (4)

1. The utility model provides an anti positive pressure that backflows connects, includes positive pressure functional unit and anti backward flow portion, its characterized in that: the positive pressure functional part comprises an upper shell and a positive pressure rubber cushion, the anti-backflow part comprises an anti-backflow rubber cushion and a lower shell, a guide seat is arranged between the positive pressure rubber cushion and the anti-backflow rubber cushion, the upper end of the positive pressure rubber cushion is embedded into the upper shell, the lower end of the positive pressure rubber cushion is sleeved on the upper end face of the guide seat, the lower end face of the anti-backflow rubber cushion is abutted against the upper end of the lower shell, the upper end face of the anti-backflow rubber cushion is abutted against the lower end of the guide seat, the anti-backflow rubber cushion comprises a rubber cushion ring and a rubber film arranged in the rubber cushion ring, and a notch is formed in the rubber film.

2. An anti-reflux positive pressure fitting according to claim 1, wherein: the rubber pad ring comprises an elliptic rubber pad ring, the rubber membrane comprises an elliptic rubber membrane matched with the elliptic rubber pad ring, and the notch is arranged along the major axis direction of the elliptic rubber membrane.

3. An anti-reflux positive pressure fitting according to claim 2, wherein: and an anti-reflux valve which is connected with the elliptic rubber membrane integrally and is concave is arranged below the incision.

4. An anti-reflux positive pressure fitting according to claim 1, wherein: the positive pressure rubber pad comprises a cylinder body and a plug arranged at the top end of the cylinder body, the outer edge of the plug is matched with the top of the inner wall of the upper shell, and a liquid storage cavity is formed in the side wall of the plug.

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