CN219481108U

CN219481108U - Needleless connector capable of preventing blood return and positive pressure

Info

Publication number: CN219481108U
Application number: CN202320145857.7U
Authority: CN
Inventors: 杨易文; 潘名辉; 庞超; 陆汉超
Original assignee: Hantech Medical Device Co ltd
Current assignee: Hantech Medical Device Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-08-08
Anticipated expiration: 2033-02-08

Abstract

The utility model relates to a positive pressure needleless connector for preventing blood return, which comprises an upper shell, positive pressure silica gel and a lower shell, wherein the upper shell comprises a positive pressure sleeve and a screw connector, an antibacterial and dustproof patch is connected to the screw connector, a liquid injection hole is formed in the screw connector, a positive pressure inner cavity is formed in the positive pressure sleeve, the liquid injection hole is communicated with the positive pressure inner cavity through a sealing surface, the positive pressure silica gel comprises a silica gel sleeve and a silica gel head, the top end of the silica gel head is provided with a sealing end surface, the silica gel head is provided with a liquid inlet notch, the silica gel head is connected with the silica gel sleeve through a sealing shoulder, a supporting table and a cutting joint are arranged in the liquid inlet notch, when the connector is used, the antibacterial and dustproof patch is opened, pressure is applied to the sealing end surface, the silica gel inner cavity is deformed, the sealing joint is separated, and liquid medicine circulates in the inner cavity of the connector; when the force applied to the sealing end face disappears, the silica gel head and the supporting table rebound to be in sealing fit with the upper shell again, so that the sealing performance is enhanced, positive pressure is generated, blood backflow is prevented, and then the antibacterial and dustproof paste is stuck to the sealing end face, so that bacteria and dust can be effectively prevented.

Description

Needleless connector capable of preventing blood return and positive pressure

Technical Field

The utility model relates to the technical field of infusion accessories, in particular to an anti-back blood positive pressure needleless connector.

Background

Intravenous catheters are widely used in clinic with increased medical levels. The indwelling needle is widely used, meanwhile, problems are found, the indwelling needle needs to be repeatedly used for flushing and sealing the tube, so that the workload of a doctor is increased, the incidence rate of phlebitis is increased, in actual operation, no matter an infusion set or an injector is withdrawn from the indwelling needle, negative pressure is generated to return blood, thrombus is formed, the blood is prevented from being returned while the needle is withdrawn, and the requirements on professional technology and experience accumulation of operators are high. In order to solve the problem, the existing needleless connector is provided with a silica gel in an upper shell, one end of the silica gel corresponding to a liquid injection hole of the upper shell is provided with a liquid inlet notch, when the existing needleless connector is used, after a gap is formed between the silica gel and the upper shell by pushing away the silica gel, liquid medicine is convenient to enter, and when the existing needleless connector is not used, the existing silica gel is sealed with the upper shell through elastic resilience of the silica gel, but has a certain elasticity, but the rebound probability is lower after the existing needleless connector is used for a long time, so that the sealing between the silica gel and the upper shell can be influenced; in addition, before the upper shell and the silica gel are used and after the upper shell and the silica gel rebound, the end face of the silica gel and the liquid injection hole end of the upper shell are exposed, so bacteria and dust can be stained, and the safety of transfusion is affected.

Disclosure of Invention

The utility model aims to provide a positive pressure needleless connector for preventing blood return, which has the characteristics of enhanced sealing performance, blood return prevention, effective bacteria and dust prevention and convenient installation.

In order to solve the technical problems, the utility model is solved by the following technical scheme:

the utility model provides a prevent back blood malleation needleless joint, includes the epitheca that is connected with external pipeline, malleation silica gel and the inferior valve that is connected through luer joint with the needle of keeping somewhere, the epitheca includes malleation sleeve and screwed joint, be connected with the antibacterial dustproof subsides on the screwed joint, seted up the notes liquid hole in the screwed joint, seted up the malleation inner chamber in the malleation sleeve, annotate liquid hole and malleation inner chamber and pass through sealed face intercommunication, malleation silica gel includes silica gel sleeve and silica gel head, and the silica gel head top is equipped with sealed terminal surface, and the feed liquor breach has been seted up to the silica gel head, links to each other through sealed shoulder between silica gel head and the silica gel sleeve, be equipped with the brace table in the feed liquor breach, be formed with the joint cutting between brace table and the feed liquor breach.

Preferably, the antibacterial and dustproof patch comprises a sleeve ring sleeved on the screw joint, one end of the sleeve ring is connected with a connecting plate, and one end of the connecting plate is movably hinged with a movable baffle which can be connected with the connecting plate in a staggered manner or can be unfolded to be blocked on the end face of the sealing surface.

Further preferably, the inner wall of the silica gel sleeve is provided with a clamping groove, the outer wall of the lower shell is provided with a leakage-proof ring, and the positive pressure silica gel is matched and clamped with the lower shell through the leakage-proof ring and the clamping groove.

Further preferably, the sealing surface comprises a first conical sealing groove with the upper end connected with the liquid injection hole and a second conical sealing groove with the lower end connected with the positive pressure inner cavity.

Further preferably, the sealing shoulder comprises a first conical sealing ring matched with the first conical sealing groove and a second conical sealing ring matched with the second conical sealing groove.

Further preferably, a sealing groove is formed in one end, close to the sealing end face, of the liquid inlet notch.

Further preferably, rebound reinforcing ribs are formed on the inner side wall of the silica gel sleeve.

Further preferably, the lower shell and the upper shell are connected through ultrasonic welding.

The utility model has the beneficial effects that: including the epitheca that is connected with external pipeline, malleation silica gel and with keep somewhere the needle and pass through the inferior valve that luer connects, the epitheca includes malleation sleeve and screwed joint, be connected with the dustproof subsides of preventing fungus on the screwed joint, set up the notes liquid hole in the screwed joint, set up the malleation inner chamber in the malleation sleeve, annotate liquid hole and malleation inner chamber and pass through sealed face intercommunication, malleation silica gel includes silica gel sleeve and silica gel head, and silica gel head top is equipped with sealed terminal surface, and the feed liquor breach has been seted up to the silica gel head, links to each other through sealed shoulder between silica gel head and the silica gel sleeve, be equipped with the brace table in the feed liquor breach, be formed with the joint between brace table and the feed liquor breach, with this use novel connection through luer connects between external pipeline and keep somewhere the needle, simple to operate, open earlier and prevent fungus dustproof subsides, the rethread is exerted pressure to the sealed terminal surface of malleation silica gel, and is made the silica gel inner chamber produce the infracture deformation, and then makes sealed the laminating punishment separation produce the clearance at joint inner chamber, accomplishes the back outside pipeline and withdraw the time to the sealed terminal surface of malleation, and the seal terminal surface of malleation silica gel is disappeared, and the seal back-up with the back-up cap is equipped with the seal face, and the back-up the back-flow is prevented from having the back-flowing back to the seal.

Drawings

Fig. 1 is a cross-sectional view of the present utility model.

Fig. 2 is a schematic exploded view of the present utility model.

Fig. 3 is a cross-sectional view of the upper shell of the present utility model.

FIG. 4 is a cross-sectional view of a positive pressure silica gel of the present utility model.

FIG. 5 is a standing state diagram of the antibacterial and dustproof patch of the present utility model.

FIG. 6 is a working state diagram of the antibacterial and dustproof patch in the utility model.

Fig. 7 is a stock state diagram of the entire present utility model.

Fig. 8 is a view showing the overall operation of the present utility model.

Description of the embodiments

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

As shown in figures 1-8, the positive pressure needleless connector for preventing blood return comprises an upper shell 1 connected with an external pipeline, positive pressure silica gel 2 and a lower shell 3 connected with an indwelling needle through a luer connector, wherein the lower shell 3 is connected with the upper shell 1 through ultrasonic welding, the upper shell 1 comprises a positive pressure sleeve 4 and a screw connector 5, an antibacterial dustproof patch 6 is connected to the screw connector 5, a liquid injection hole 7 is formed in the screw connector 5, a positive pressure inner cavity 8 is formed in the positive pressure sleeve 4, the liquid injection hole 7 is communicated with the positive pressure inner cavity 8 through a sealing surface 9, the positive pressure silica gel 2 comprises a silica gel sleeve 10 and a silica gel head 11, the top end of the silica gel head 11 is provided with a sealing end surface 12, the silica gel head 11 is provided with a liquid inlet notch 13, the silica gel head 11 is connected with the silica gel sleeve 10 through a sealing shoulder 14, a supporting table 15 is arranged in the liquid inlet notch 13, a cutting joint 16 is formed between the supporting table 15 and the liquid inlet notch 13, when the utility model is connected between an external pipeline and an indwelling needle through a luer connector, the utility model is convenient to install, firstly, the antibacterial and dustproof patch 6 is opened, then the sealing end face 12 of the positive pressure silica gel 2 is applied with pressure, the silica gel cavity is deformed inwards, air is discharged through the air discharge hollow hole of the lower shell 3, the transfusion cavity is enlarged, the sealing and attaching separation is further carried out to generate a gap, the circulation of liquid medicine in the connector cavity is realized, the external pipeline is evacuated after transfusion is completed, the application force on the sealing end face 12 of the positive pressure silica gel 2 disappears, the silica gel head 11 and the supporting table 15 of the positive pressure silica gel 2 rebound to restore to the original shape and are attached to the upper shell 1 in a sealing way, thus the sealing performance is enhanced, the inner cavity volume of the upper shell 1 is reduced along with the restoration of the silica gel cavity, the positive pressure is generated, the blood backflow is prevented, finally, the antibacterial and dustproof patch 6 is attached to the sealing end face 12, can effectively prevent bacteria and dust.

In this embodiment, the antibacterial and dustproof patch 6 includes a collar 17 sleeved on the screw joint 5, one end of the collar 17 is connected with a connecting plate 18, one end of the connecting plate 18 is movably hinged with a movable baffle 19 which can be connected with the connecting plate 18 in a staggered manner or spread to block the end face of the sealing face 9, the antibacterial and dustproof patch 6 is made of a polymer material (such as antibacterial plastic), has an antibacterial function, has the characteristics of adhesiveness or vacuum adsorption, can be repeatedly used, is self-adhered together before use, and is adhered to a liquid inlet port of a needleless joint during use.

In this embodiment, the joint groove has been seted up to silica gel sleeve 10 inner wall, and the inferior valve 3 outer wall is equipped with leak protection ring 20, positive pressure silica gel 2 and inferior valve 3 pass through leak protection ring 20 and joint groove cooperation joint, leak protection ring 20 and joint groove interference fit or adhesive connection play sealed leak protection's effect to the liquid medicine.

In this embodiment, the sealing surface 9 includes a first tapered sealing groove 21, the upper end of which is connected with the liquid injection hole 7, and a second tapered sealing groove 22, the lower end of which is connected with the positive pressure inner cavity 8, the sealing shoulder 14 includes a first tapered sealing ring 23 that is matched with the first tapered sealing groove 21 and a second tapered sealing ring 24 that is matched with the second tapered sealing groove 22, a sealing groove 25 is formed at one end of the liquid inlet notch 13, which is close to the sealing end surface 12, and the upper shell 1 and the positive pressure silica gel 2 are in sealing connection after the non-transfusion or transfusion is completed through the first tapered sealing groove 21, the first tapered sealing ring 23, the second tapered sealing groove 22 and the second tapered sealing ring 24.

In this embodiment, the inner side wall of the silica gel sleeve 10 is formed with a rebound reinforcing rib 26, and the rebound reinforcing rib 26 can further enhance the sealing effect.

The present disclosure should not be construed as limiting the utility model to any particular embodiment or application within its scope as contemplated by the present disclosure.

Claims

1. The utility model provides a prevent back blood malleation needleless joint, includes upper housing, malleation silica gel and the inferior valve of being connected through luer joint with remaining needle with external pipeline connection, its characterized in that: the upper shell comprises a positive pressure sleeve and a screw joint, an antibacterial and dustproof paste is connected to the screw joint, a liquid injection hole is formed in the screw joint, a positive pressure inner cavity is formed in the positive pressure sleeve, the liquid injection hole is communicated with the positive pressure inner cavity through a sealing surface, positive pressure silica gel comprises a silica gel sleeve and a silica gel head, a sealing end face is arranged at the top end of the silica gel head, a liquid inlet gap is formed in the silica gel head, the silica gel head is connected with the silica gel sleeve through a sealing shoulder, a supporting table is arranged in the liquid inlet gap, and a cutting joint is formed between the supporting table and the liquid inlet gap.

2. A positive blood return prevention needleless connector as claimed in claim 1 in which: the antibacterial dustproof paste comprises a lantern ring sleeved on the screw joint, one end of the lantern ring is connected with a connecting plate, and one end of the connecting plate is movably hinged with a movable baffle which can be connected with the connecting plate in a staggered manner or can be unfolded to be blocked on the end face of the sealing surface.

3. A positive blood return prevention needleless connector as claimed in claim 1 in which: the joint groove has been seted up to silica gel sleeve inner wall, and the inferior valve outer wall is equipped with the leak protection ring, positive pressure silica gel passes through leak protection ring and joint groove cooperation joint with the inferior valve.

4. A positive blood return prevention needleless connector as claimed in claim 1 in which: the sealing surface comprises a first conical sealing groove with the upper end connected with the liquid injection hole and a second conical sealing groove with the lower end connected with the positive pressure inner cavity.

5. A positive anti-flashback needleless connector as defined in claim 4, wherein: the sealing shoulder comprises a first conical sealing ring matched with the first conical sealing groove and a second conical sealing ring matched with the second conical sealing groove.

6. A positive anti-flashback needleless connector as defined in claim 5, wherein: and a sealing groove is formed in one end, close to the sealing end face, of the liquid inlet notch.

7. A positive blood return prevention needleless connector as claimed in claim 1 in which: and rebound reinforcing ribs are formed on the inner side wall of the silica gel sleeve.

8. A positive blood return prevention needleless connector as claimed in claim 1 in which: the lower shell and the upper shell are connected through ultrasonic welding.