CN216258733U

CN216258733U - Novel malleation does not have needle joint

Info

Publication number: CN216258733U
Application number: CN202122223275.XU
Authority: CN
Inventors: 吴俊�; 陆汉超; 庞超
Original assignee: Hantech Medical Device Co ltd
Current assignee: Hantech Medical Device Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-04-12
Anticipated expiration: 2031-09-14

Abstract

The utility model discloses a novel positive-pressure needleless connector, which comprises an upper shell, silica gel and a lower shell, and is characterized in that: silica gel sets up within the epitheca, the silica gel upper end is formed with the airtight terminal surface of silica gel and silica gel seal shoulder, silica gel is formed with a downward open-ended silica gel inner chamber, the upper portion of inferior valve stretches into the epitheca inner chamber and with the silica gel inner chamber sealing connection of silica gel, the lower port of epitheca forms the ultrasonic bonding conical surface, be formed with on the outer wall of inferior valve with ultrasonic bonding conical surface complex ultrasonic bonding inclined plane, inferior valve and epitheca adopt ultrasonic bonding to connect, the inferior valve lower part is formed with luer and connects, be formed with the exhaust hole that communicates with the silica gel inner chamber on the luer connects, form the infusion inner chamber between epitheca inner chamber and the silica gel outer wall, be formed with the intercommunication passageway that communicates luer and infusion inner chamber on the inferior valve. The utility model provides a novel positive-pressure needleless connector which is convenient to install, enhances the sealing performance, prevents blood return and reduces the technical requirements of operators.

Description

Novel malleation does not have needle joint

Technical Field

The utility model relates to the field of medical instruments, in particular to a novel positive-pressure needleless connector.

Background

With the improvement of medical level, the vein indwelling needle gradually replaces a scalp steel needle and is widely applied to clinic. The indwelling needle is widely applied and simultaneously some problems are found, the indwelling needle needs to wash and seal the tube repeatedly, so the nursing workload is increased, the incidence rate of phlebitis is also increased, in the actual operation, when the infusion apparatus or the injector is withdrawn from the indwelling needle, negative pressure can be generated to return blood, thrombus is formed, when the blood is prevented from being returned, the needle is withdrawn while the liquid is fed, and the requirement on the professional skill and experience accumulation of operators is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of the prior art, and provides a novel positive-pressure needleless connector which is convenient to install, enhances the sealing performance, prevents blood return and reduces the technical requirements of operators.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a novel malleation needleless connector, includes epitheca, silica gel and inferior valve which characterized in that: the upper shell is hollow, a liquid injection hole is formed at the upper end of the inner cavity of the upper shell, an inner cavity sealing surface is formed on the inner cavity of the upper shell and positioned at the lower part of the liquid injection hole, silica gel is arranged in the upper shell, a silica gel sealing end face used for being plugged into the liquid injection hole to seal the silica gel sealing end face is formed at the upper end of the silica gel, a silica gel sealing shoulder used for being in sealing fit with the inner cavity sealing surface is arranged on the silica gel and positioned below the silica gel sealing end face, a silica gel inner cavity with a downward opening is formed on the silica gel, the upper part of the lower shell extends into the inner cavity of the upper shell and is in sealing connection with the silica gel inner cavity of the silica gel, an ultrasonic welding conical surface matched with the ultrasonic welding conical surface is formed at the lower end of the upper shell, the lower shell and the upper shell are in ultrasonic welding connection, a luer connector is formed at the lower part of the lower shell, an exhaust hole communicated with the silica gel inner cavity is formed at the luer connector, and a transfusion inner cavity is formed between the upper shell and the outer wall of the silica gel, a communicating channel for communicating the luer connector and the transfusion inner cavity is formed on the lower shell.

As the improvement, be formed with a sealing ring and a recess on the inferior valve upper portion outer wall, be formed with the leak protection snap ring in the silica gel inner chamber of silica gel, leak protection snap ring card is gone into in the recess.

In a further improvement, the outer wall of the top of the upper shell is provided with a connecting thread for connecting with infusion syringes of different types.

And improving the silica gel, wherein at least one rebound reinforcing rib is formed on the inner side wall of the silica gel inner cavity of the silica gel.

And improving the structure, wherein the sealed end face of the silica gel adopts an L-shaped structural design.

And then, improving the structure that the upper part of the silica gel is positioned between the silica gel sealing end face and the silica gel sealing shoulder to form a circle of pressurizing sealing ring.

Compared with the prior art, the utility model has the advantages that: during the use, connect between external pipeline and keep somewhere between the needle, luer joint through the inferior valve is connected with keeping somewhere the needle, let its silica gel inner chamber produce inflection deformation through exerting pressure to silica gel seal end face again, and then make the sealed laminating department separation between the silica gel seal shoulder of the inner chamber of epitheca and silica gel produce the clearance, realize that the liquid medicine circulates at the joint inner chamber, external pipeline withdraws after the completion infusion, exert force to silica gel seal end face and disappear, silica gel resilience returns original shape, the sealed laminating of inner chamber of silica gel seal shoulder and epitheca is sealed again, along with the silica gel inner chamber resumes, epitheca inner chamber volume diminishes, thereby produce the malleation, prevent the blood backward flow.

Drawings

Fig. 1 is a schematic structural diagram of the appearance of the novel positive pressure needleless connector in the embodiment of the utility model;

FIG. 2 is an exploded view of the novel positive pressure needleless connector of the present invention;

fig. 3 is a cross-sectional view of a novel positive pressure needleless connector of an embodiment of the present invention in an exploded condition;

fig. 4 is a cross-sectional view of a novel positive pressure needleless connector in accordance with an embodiment of the present invention;

fig. 5 is a cross-sectional view of the novel positive pressure needleless connector of this embodiment of the present invention in another orientation.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 5, the novel positive pressure needleless connector in the present embodiment includes an upper case 1, a silicone rubber 3, and a lower case 2.

Wherein, the upper shell 1 is hollow, the upper end of the inner cavity of the upper shell 1 is provided with a liquid injection hole 12, the inner cavity of the upper shell 1 is positioned at the lower part of the liquid injection hole 12 to form an inner cavity sealing surface 13, the silica gel 3 is arranged in the upper shell 1, the upper end of the silica gel 3 is provided with a silica gel sealing end surface 31 for plugging the liquid injection hole 12 to seal the silica gel, the silica gel 3 is positioned below the silica gel sealing end surface 31 and is provided with a silica gel sealing shoulder 33 for sealing and matching with the inner cavity sealing surface 13, the silica gel 3 is provided with a silica gel inner cavity 35 with a downward opening, the upper part of the lower shell 2 extends into the inner cavity of the upper shell 1 and is in sealing connection with the silica gel inner cavity 35 of the silica gel 3, the lower end opening of the upper shell 1 is provided with an ultrasonic welding conical surface 16, the outer wall of the lower shell 2 is provided with an ultrasonic welding inclined surface 25 matched with the ultrasonic welding conical surface 16, the lower shell 2 is connected with the upper shell 1 by ultrasonic welding, the lower part of the lower shell 2 is provided with a Ruhr joint 24, the Ruhr joint 24 is provided with an exhaust hole 241 communicated with the inner cavity of the silica gel 2, preferably, the number of the exhaust holes 241 is two, and the exhaust holes are used for air intake and exhaust when the silica gel 2 deforms and rebounds, an infusion inner cavity 14 is formed between the inner cavity of the upper shell 1 and the outer wall of the silica gel 3, and a communication channel 23 for communicating the luer connector 2 and the infusion inner cavity 14 is formed on the lower shell 2.

When the silica gel sealed end face 31 is subjected to external pipeline pressure, the silica gel inner cavity 35 is compressed and deformed, internal air is exhausted through the exhaust holes 241 of the lower shell 2, the silica gel sealed shoulder 33 is separated from the sealing face 13 of the inner cavity of the upper shell 1, the transfusion inner cavity 14 is expanded, liquid medicine flows into the transfusion inner cavity 14 for transfusion, the external pipeline is withdrawn after transfusion is completed, the silica gel 3 rebounds, the silica gel inner cavity 35 is recovered, and the transfusion inner cavity 14 generates positive pressure to prevent blood backflow.

Further, be formed with a sealing ring 21 and a recess 22 on the outer wall of inferior valve 2 upper portion, be formed with leak protection snap ring 37 in the silica gel inner chamber 35 of silica gel 3, leak protection snap ring 37 card plays in recess 22 spacing and fixed 3 silica gel, can also strengthen silica gel inner chamber 35 airtight, prevents effectively that the liquid medicine from flowing into silica gel inner chamber 35 and the leakage condition appears.

Furthermore, the top outer wall of the upper shell 1 is provided with a connecting thread 11 for connecting with different types of infusion syringes, so that the infusion syringe can be used with various types of infusion syringes.

In addition, be formed with at least one resilience strengthening rib 34 on the silica gel inner chamber 35 inside wall of silica gel 3, preferably, resilience strengthening rib 34 quantity is two, and silica gel 3 produces the deformation back, and resilience strengthening rib 34 can increase resilience strength and rebound speed.

In addition, the sealed end face 31 of the silica gel adopts an L-shaped structural design, so that the silica gel can be deformed and rebounded better.

Finally, a circle of pressurizing sealing ring 32 is formed between the silica gel sealing end face 31 and the silica gel sealing shoulder 33 at the upper part of the silica gel 3, and the pressurizing sealing ring 32 plays a role in guiding and sealing, so that the leakage risk is reduced.

During installation, the silica gel 3 is installed on the lower shell 2, the leak-proof snap ring 37 is clamped into the groove 22 of the lower shell 2, the upper shell 1 is installed on the lower shell 2, the ultrasonic welding conical surface 16 of the lower port of the upper shell 1 and the ultrasonic welding inclined surface 25 of the lower shell 2 are attached to each other, the silica gel sealing end surface 31 is plugged into the liquid injection hole 12 of the upper shell 1 and sealed, the silica gel sealing shoulder 33 of the silica gel 3 is enabled to push against the inner cavity sealing surface 13 of the upper shell 1, and finally the upper shell 1 and the lower shell 2 are connected through ultrasonic welding to form the sealed infusion inner cavity 14. Wherein, the conical surface design structure between the upper shell 1 and the lower shell 2 can enlarge the welding area, reduce the leakage risk and play the role of installation and guidance,

the silica gel sealing end face 31 deforms when pressure of an external pipeline is applied to the silica gel sealing end face 31, the external pipeline of the liquid injection hole 12 is opened to be communicated with the infusion inner cavity 14 for infusion, meanwhile, the silica gel inner cavity 35 is also deformed by force to compress internal air to be discharged through the exhaust hole 241 of the lower shell 2, after the infusion is completed, the external pipeline is withdrawn from the silica gel 3, the rebound silica gel inner cavity 35 is returned to the original air inlet state again, the infusion inner cavity 14 generates positive pressure to prevent blood backflow, and meanwhile, the silica gel sealing end face 31 seals the liquid injection hole.

During the use, connect between external pipeline and the needle of keeping somewhere, luer connector 24 through inferior valve 2 is connected with the needle of keeping somewhere, again through applying pressure to silica gel seal end face 31 and make its silica gel inner chamber 35 produce the inflection deformation, and then make the sealed laminating department separation between the sealed shoulder 33 of silica gel 3's inner chamber of epitheca 1 produce the clearance, realize that the liquid medicine circulates at the joint inner chamber, accomplish the infusion back external pipeline and withdraw, exert the force to silica gel seal end face 31 and disappear, silica gel 3 kick-backs and resumes original shape, silica gel seal shoulder 33 and the sealed laminating of inner chamber 13 of epitheca 1 again, along with silica gel inner chamber 35 resumes, epitheca inner chamber volume diminishes, thereby produce the malleation, prevent the blood backward flow.

Claims

1. The utility model provides a novel malleation needleless connector, includes epitheca (1), silica gel (3) and inferior valve (2), its characterized in that: the inner part of the upper shell (1) is hollow, the upper end of the inner cavity of the upper shell (1) is provided with a liquid injection hole (12), the inner cavity of the upper shell (1) is positioned at the lower part of the liquid injection hole (12) to form an inner cavity sealing surface (13), the silica gel (3) is arranged in the upper shell (1), the upper end of the silica gel (3) is provided with a silica gel sealing end surface (31) which is used for being plugged into the liquid injection hole (12) to seal the silica gel sealing end surface, the silica gel (3) is positioned below the silica gel sealing end surface (31) and is provided with a silica gel sealing shoulder (33) which is in sealing fit with the inner cavity sealing surface (13), the silica gel (3) is provided with a silica gel inner cavity (35) which is opened downwards, the upper part of the lower shell (2) extends into the inner cavity of the upper shell (1) and is in sealing connection with the silica gel inner cavity (35) of the silica gel (3), the lower end opening of the upper shell (1) is provided with an ultrasonic welding conical surface (16), the outer wall of the lower shell (2) is provided with an ultrasonic welding conical surface (25) which is matched with the ultrasonic welding conical surface (16), the lower shell (2) is connected with the upper shell (1) by ultrasonic welding, a luer connector (24) is formed at the lower part of the lower shell (2), an exhaust hole (241) communicated with the silica gel inner cavity (35) is formed on the luer connector (24), an infusion inner cavity (14) is formed between the inner cavity of the upper shell (1) and the outer wall of the silica gel (3), and a communication channel (23) communicated with the luer connector (24) and the infusion inner cavity (14) is formed on the lower shell (2).

2. The novel positive pressure needleless connector of claim 1, wherein: be formed with a sealing ring (21) and a recess (22) on inferior valve (2) upper portion outer wall, be formed with leak protection snap ring (37) in silica gel inner chamber (35) of silica gel (3), leak protection snap ring (37) are gone into in recess (22).

3. The novel positive pressure needleless connector of claim 1, wherein: the outer wall of the top of the upper shell (1) is provided with a connecting thread (11) for connecting with infusion syringes of different types.

4. The novel positive pressure needleless connector of claim 1, wherein: at least one springback reinforcing rib (34) is formed on the inner side wall of the silica gel inner cavity (35) of the silica gel (3).

5. The novel positive pressure needleless connector of claim 1, wherein: the sealed end face (31) of the silica gel adopts an L-shaped structural design.

6. The novel positive pressure needleless connector of claim 1, wherein: and a circle of pressurizing sealing ring (32) is formed between the silica gel sealing end face (31) and the silica gel sealing shoulder (33) on the upper part of the silica gel (3).