CN110947091A

CN110947091A - Needleless positive pressure joint

Info

Publication number: CN110947091A
Application number: CN201910917453.3A
Authority: CN
Inventors: 罗敬欢; 周伟; 黎萌
Original assignee: Guangdong Baihe Medical Technologies Ltd
Current assignee: Guangdong Baihe Medical Technologies Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-04-03

Abstract

The invention discloses a needle-free positive pressure joint which comprises a first cover, a rubber valve and a second cover; the glue valve comprises a head part and a volume change part with a second inner cavity, a first cover is provided with a first inner cavity, the first inner cavity comprises a sealing section and a through-flow section, and an inlet of the first cavity is arranged on the sealing section. When the head gets into through-flow section, be equivalent to with the entry in first chamber with go into liquid mouth intercommunication, the liquid medicine just can realize supplying with like this, and when the head down extrudeed, the gas of second inner chamber is discharged earlier, the volume of volume change portion diminishes, through-flow clearance volume grow, accomplishes the infusion back, the head gets into sealed section again, volume change portion recovery volume, through-flow clearance volume diminishes to the liquid medicine is crowded into to the passageway of leading to, the realization malleation.

Description

Needleless positive pressure joint

Technical Field

The invention relates to the field of medical instruments, in particular to a needle-free positive pressure joint.

Background

With the development of technology and the continuous updating of medical supplies, the indwelling needle has been recommended by the world health organization as the safest puncture tool. The operation is simple, repeated puncture, blood vessel protection and pain relief of patients can be reduced, clinical medication and emergency rescue are facilitated, the workload of nurses is reduced, and the device is widely applied to clinic;

needleless connectors are commonly used today to connect indwelling needles to infusion lines. Particularly, the positive pressure needleless connector has the advantages that when the infusion connector is pulled down, positive pressure needleless connector can automatically form positive pressure on the pipeline, and liquid is automatically pushed to the human body from the pipeline, so that the phenomenon of tube blockage caused by backflow of blood to the needle tube is avoided;

the disposable venous indwelling needle for clinical use of clinical units of various medical institutions in China is mostly provided with a so-called positive pressure connector, some positive pressure connectors cannot really play a positive pressure role, and the internal structure of some positive pressure connectors is complex and is not only a sealing ring but also a valve core and the like, so that the problems of complexity in production and assembly, potential safety hazard of products, insufficient liquid storage amount, low qualified rate of finished products and the like are brought.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided is a needleless connector capable of realizing positive pressure.

The solution of the invention for solving the technical problem is as follows:

a needle-free positive pressure joint comprises a first cover, an elastic rubber valve and a second cover;

the glue valve comprises a head part and a volume change part with a second inner cavity, which are connected in sequence, wherein the second inner cavity is provided with a second air outlet;

the second cover is provided with a ventilation channel and a liquid passage, the second cover is hermetically connected with the second air outlet, and the ventilation channel communicates the outside of the second cover with the second inner cavity;

the first cover is provided with a first inner cavity, the first inner cavity comprises a sealing section and a through-flow section which are sequentially connected, and an inlet of the first cavity is arranged on the sealing section;

the second cover is connected with the outlet of the first cavity in a sealing mode, the rubber valve is arranged in the first inner cavity, the head is connected with the sealing section in a movable sealing mode, the volume change portion is arranged in the through flow section, a through flow gap is formed between the volume change portion and the through flow section, the head can enter the through flow section, therefore, the inlet of the first cavity is communicated with the through flow section, the liquid passing channel is provided with a liquid outlet and a liquid inlet, and the liquid inlet is communicated with the through flow gap.

As a further improvement of the scheme, the rubber valve further comprises a waist-contracting portion, the head portion, the waist-contracting portion and the volume change portion are sequentially connected, the waist-contracting portion is arranged in the sealing section, and a waist-contracting recess is formed in the waist-contracting portion.

As the further improvement of above-mentioned scheme, the vertical setting of second inner chamber, the left side and the right side of the chamber wall of second inner chamber all are equipped with and subtract material portion, and left side and right side subtract material portion interval setting one on top of the other in vertical direction.

As a further improvement of the scheme, the rubber valve further comprises a waist-contracting portion, the head portion, the waist-contracting portion and the volume change portion are sequentially connected, the waist-contracting portion is arranged in the sealing section, and waist-contracting depressions are formed in the left side and the right side of the waist-contracting portion.

As a further improvement of the above aspect, the first cover is located above the second cover.

As a further improvement of the above, the first cap and the second cap are connected by a screw thread.

As a further improvement of the proposal, the second cover is provided with a sleeve-shaped sleeve joint part and a transfusion tube, the transfusion tube is arranged in the sleeve joint part, a connecting gap is arranged between the transfusion tube and the sleeve joint part, the inner wall of the sleeve joint part is provided with screw threads, and the transfusion tube is internally provided with the liquid through channel.

As a further improvement of the scheme, the first cover, the glue valve and the second cover are formed integrally.

The invention has the beneficial effects that: when the head gets into through-flow section, be equivalent to with the entry in first chamber with go into liquid mouth intercommunication, the liquid medicine just can realize supplying with like this, and when the head down extrudeed, the gas of second inner chamber is discharged earlier, the volume of volume change portion diminishes, through-flow clearance volume grow, accomplishes the infusion back, the head gets into sealed section again, volume change portion recovery volume, through-flow clearance volume diminishes to the liquid medicine is crowded into to the passageway of leading to, the realization malleation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the described drawings are only a part of the embodiments of the invention, not all embodiments, and that a person skilled in the art will be able to derive other designs and drawings from these drawings without the exercise of inventive effort.

FIG. 1 is a front sectional view of the present invention;

FIG. 2 is a front view of the glue valve of the present invention;

FIG. 3 is a front cross-sectional view of the glue valve of the present invention;

FIG. 4 is a side cross-sectional view of the glue valve of the present invention;

fig. 5 is a front view of the present invention.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and the embodiments, so that the objects, the features and the effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

Some embodiments of a needle-free positive pressure connector, illustrated with reference to fig. 1 to 4, comprise a first cap 1, a glue valve with elasticity, a second cap 2;

the rubber valve comprises a head part 31 and a volume change part 33 with a second inner cavity, which are connected in sequence, wherein a second air outlet is arranged on the second inner cavity;

the second cover 2 is provided with a ventilation channel 21 and a liquid passage 22, the second cover 2 is hermetically connected with the second air outlet, and the ventilation channel 21 communicates the outside of the second cover 2 with the second inner cavity;

the first cover 1 is provided with a first inner cavity, the first inner cavity comprises a sealing section 11 and a through-flow section 12 which are sequentially connected, and an inlet of the first cavity is arranged on the sealing section;

the second cover 2 is connected with the outlet of the first cavity in a sealing way, the glue valve is arranged in the first inner cavity, the head 31 is connected with the sealing section in a movable sealing way, the volume change part 33 is arranged in the through flow section 12, a through flow gap is arranged between the volume change part 33 and the through flow section 12, the head 31 can enter the through flow section 12 so as to communicate the inlet of the first cavity with the through flow section 12, the liquid passage 22 is provided with a liquid outlet and a liquid inlet which are communicated with the through flow gap, for example, the dotted line in figure 1 is a liquid medicine flow diagram, the solid line is a gas flow diagram in the second inner cavity, when the head 31 enters the through flow section, the inlet of the first cavity is communicated with the liquid inlet, so that the liquid medicine can be supplied, when the head 31 is extruded downwards, the gas in the second inner cavity is firstly discharged, the volume change part 33 is reduced, the volume of the through flow gap is increased, after the transfusion is finished, the head 31 enters the sealing section 11 again, the volume changing portion 33 recovers the volume and the through-flow gap volume becomes small, thereby pushing the liquid medicine into the liquid passage 22 and realizing positive pressure.

In some embodiments, the rubber valve further includes a waist-contracting portion 32, the head portion 31, the waist-contracting portion 32 and the volume changing portion 33 are sequentially connected, the waist-contracting portion 32 is arranged in the sealing section 11, and a waist-contracting recess is formed in the waist-contracting portion 32, so that the head portion 31 is conveniently deformed and enters the through-flow section 12, friction between the rubber valve and the sealing section can be reduced, and a cavity wall forming a certain included angle with the extending direction of the volume changing portion 33 is conveniently formed, so that the cavity wall of the second inner cavity is conveniently deformed and distorted, and the volume change of the volume changing portion 33 is not caused by compression of the elastic material but caused by deformation and distortion of the cavity wall of the second inner cavity, so that the volume is greatly changed, and the.

In some embodiments, the second inner chamber is vertically arranged, the material reducing portions 34 are arranged on the left side and the right side of the wall of the second inner chamber, the material reducing portions 34 on the left side and the right side are arranged at intervals in the vertical direction, and the material reducing portions 34 can form a strength weak structure in the second inner chamber to be deformed more easily.

In order to make the volume change part 33 deform more easily, the rubber valve further comprises a waist-contracting part 32, the head part 31, the waist-contracting part 32 and the volume change part 33 are connected in sequence, the waist-contracting part 32 is arranged in the sealing section 11, and waist-contracting depressions are arranged on the left side and the right side of the waist-contracting part 32.

In some embodiments, as shown in fig. 1 to 5, the first cover 1 is positioned above the second cover 2, which is a structure that is convenient to manufacture and use.

To facilitate the connection, in some embodiments, the first and second caps 1 and 2 are connected by threads.

In order to facilitate the mold forming and the practical use, in some embodiments, the second cover 2 is provided with a sleeve-shaped sleeve-joint portion 23 and a transfusion tube 24, the transfusion tube 24 is arranged in the sleeve-joint portion 23, a connection gap is arranged between the transfusion tube 24 and the sleeve-joint portion 23, the inner wall of the sleeve-joint portion 23 is provided with a thread, and the transfusion tube 24 is provided with the liquid passage 22.

In some embodiments, the first cover 1, the glue valve and the second cover 2 are integrally formed, so that a real positive pressure can be realized by using three components, and the structure is simple, and the manufacturing and assembling cost is low.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A needle-free positive pressure fitting, comprising: comprises a first cover (1), an elastic rubber valve and a second cover (2);

the glue valve comprises a head part (31) and a volume change part (33) with a second inner cavity, which are connected in sequence, wherein a second air outlet is arranged on the second inner cavity;

the second cover (2) is provided with a ventilation channel (21) and a liquid passage (22), the second cover (2) is hermetically connected with the second air outlet, and the ventilation channel (21) communicates the outside of the second cover (2) with the second inner cavity;

the first cover (1) is provided with a first inner cavity, the first inner cavity comprises a sealing section (11) and a through-flow section (12) which are sequentially connected, and an inlet of the first cavity is arranged on the sealing section;

the second cover (2) is connected with an outlet of the first cavity in a sealing mode, the rubber valve is arranged in the first inner cavity, the head (31) is connected with the sealing section in a movable sealing mode, the volume change portion (33) is arranged in the through flow section (12), a through flow gap is formed between the volume change portion (33) and the through flow section (12), the head (31) can enter the through flow section (12) to enable an inlet of the first cavity to be communicated with the through flow section (12), the liquid passing channel (22) is provided with a liquid outlet and a liquid inlet, and the liquid inlet is communicated with the through flow gap.

2. The needle-free positive pressure fitting of claim 1, wherein: the rubber valve further comprises a waist-contracting portion (32), the head portion (31), the waist-contracting portion (32) and the volume changing portion (33) are sequentially connected, the waist-contracting portion (32) is arranged in the sealing section (11), and a waist-contracting recess is formed in the waist-contracting portion (32).

3. The needle-free positive pressure fitting of claim 1, wherein: the vertical setting of second inner chamber, the left side and the right side in the chamber wall of second inner chamber all are equipped with subtracts material portion (34), and left side and right side subtract material portion (34) and set up at interval on vertical direction one on the other.

4. A needleless, positive pressure connector as in claim 3 wherein: the rubber valve further comprises a waist contracting portion (32), the head portion (31), the waist contracting portion (32) and the volume changing portion (33) are sequentially connected, the waist contracting portion (32) is arranged in the sealing section (11), and waist contracting depressions are formed in the left side and the right side of the waist contracting portion (32).

5. The needle-free positive pressure fitting of claim 1, wherein: the first cover (1) is positioned above the second cover (2).

6. The needle-free positive pressure fitting of claim 1, wherein: the first cover (1) and the second cover (2) are connected through threads.

7. The needle-free positive pressure fitting of claim 1, wherein: the second cover (2) is provided with a sleeve-shaped sleeve joint part (23) and a transfusion pipe (24), the transfusion pipe (24) is arranged in the sleeve joint part (23), a connecting gap is arranged between the transfusion pipe (24) and the sleeve joint part (23), the inner wall of the sleeve joint part (23) is provided with threads, and the transfusion pipe (24) is internally provided with a liquid passage (22).

8. The needle-free positive pressure fitting of claim 1, wherein: the first cover (1), the glue valve and the second cover (2) are integrally formed.