CN213432259U

CN213432259U - Positive pressure needleless connector

Info

Publication number: CN213432259U
Application number: CN202021828424.4U
Authority: CN
Inventors: 张力峰; 沈哲君
Original assignee: Shenzhen Meijin Medical Equipment Co ltd
Current assignee: Shenzhen Meijin Medical Equipment Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-06-15
Anticipated expiration: 2030-08-26

Abstract

The utility model relates to a medical infusion ware technical field discloses malleation needleless connecting piece, which comprises an outer shell, the inside cavity form that is of shell and be provided with the plug in inside, the upper portion of plug is equipped with the plug upper end, the plug upper end forms seal structure with the shell inner wall, the lower part of plug is equipped with the tip under the plug, cup joint on the end cover lateral wall under the plug, just be provided with the inner chamber in the plug, inner chamber upper portion is provided with the intercommunication groove, the exhaust hole of the inside both sides of inner chamber lower part intercommunication end cover, the terminal intercommunication outside in exhaust hole. The utility model discloses the plug lateral wall is for the screw thread shape, when bulldozing through external connection joint, and the plug upper end is in axial plane and removes until the shell middle part, separates the runner that just forms the liquid medicine between shell inner wall and the plug upper end promptly, can avoid too early formation runner to bring external bacterium dust etc. into the infusion liquid, has guaranteed the cleanness of infusion liquid, sanitary safety.

Description

Positive pressure needleless connector

Technical Field

The utility model relates to the technical field of medical infusion devices, in particular to a positive pressure needleless connecting piece.

Background

The positive pressure joint is a needle-free closed infusion joint, has the advantages of simple operation, needle stick injury prevention, effective reduction of blood return blockage, prolonged tube placing time and the like because the positive pressure is generated instantly when the injector is pulled out, and is commonly used for connecting vein tubes.

In practical application, if the transported liquid contains macromolecular tissue structures, such as blood, the arrangement of the diversion trench easily scratches blood cells, so that the infusion curative effect is influenced, and meanwhile, dead corners are formed on the inner wall of the upper cover due to the arrangement of the diversion trench, so that medicine residues are caused, and the accuracy of the medicine dosage is influenced.

So the patent application provides a positive pressure needleless connecting piece, which solves the technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a malleation needleless connecting piece, when bulldozing through external joint, the plug upper end is in axial plane and removes until the shell middle part, just the runner of liquid medicine is just formed in separation between shell inner wall and the plug upper end promptly, can avoid too early formation runner to bring external bacterium dust etc. into the infusion liquid, the cleanness of infusion liquid has been guaranteed, sanitary and safe's advantage, the plug is solved and is carried out deformation at once when the pressurized is opened and shut and form the liquid runner, bring the problem that causes the pollution into bacterium etc. easily.

According to the utility model discloses malleation needleless connecting piece, which comprises an outer shell, the inside cavity form that is of shell and be provided with the plug in inside, the upper portion of plug is equipped with the plug upper end, the plug upper end forms seal structure with the shell inner wall, the lower part of plug is equipped with the tip under the plug, the tip cup joints on the end cover lateral wall under the plug, just be provided with the inner chamber in the plug, inner chamber upper portion is provided with the intercommunication groove, the exhaust hole of the inside both sides of inner chamber lower part intercommunication end cover, the terminal intercommunication outside of exhaust hole still be provided with the liquid outlet on the end cover of exhaust hole lower part.

Further, the rubber plug side wall is arranged outside the rubber plug and is in a thread shape.

Further, the bottom end of the shell extends to an end cover, and the end cover is in threaded sealing connection with the shell.

Further, seal structure is including setting up the slope profile on the shell inner wall, the upper portion of slope profile is contradicted with plug upper end and is formed upper portion sealedly.

Furthermore, the upper portion of plug still is provided with the plug shoulder, the plug shoulder is inconsistent with the lower part of slope profile and is formed middle part sealed.

Furthermore, a convex block is arranged on the outer wall of the upper part of the shell and is integrally formed with the shell.

Further, the communicating groove extends out of the inner wall of the shell to the upper end part of the shell, and the upper end of the communicating groove is flush with the upper end part of the shell.

Furthermore, the upper end of the rubber plug is abutted against an external connecting joint, the connecting joint pushes and presses downwards to enable the middle of the shell at the upper end of the rubber plug, a flow guide channel is formed on the inner wall of the shell, and liquid medicine flows through the liquid outlet through the inner wall of the shell.

Furthermore, after the external force of attach fitting withdraws, the exhaust hole is breathed in from the outside and is got into the inner chamber, the plug constantly recovers, makes finally the upper portion of slope profile is contradicted with plug upper end and is formed upper portion and sealed, the plug shoulder is contradicted with the lower part of slope profile and is formed middle part and sealed.

Compared with the prior art, the utility model beneficial effect who has is:

1. the side wall of the rubber plug is in a threaded shape, when the rubber plug is pushed and pressed by the external connecting joint, the upper end part of the rubber plug is positioned on an axial plane and moves to the middle part of the shell, namely, a flow channel of liquid medicine is formed only by separating the inner wall of the shell from the upper end part of the rubber plug, the phenomenon that the external bacteria, dust and the like are brought into infusion liquid by the early formed flow channel can be avoided, and the cleanness, sanitation and safety of the infusion liquid are ensured;

2. the plug is when the pressurized, inner chamber department produces earlier and warp, the plug upper end is the plane all the time and moves down along the shell inner wall, when the plug upper end has not broken away from the shell inner wall yet, the plug keeps sealed with the shell inner wall, it brings bacterium or dust into to have avoided from the external world, the time or the length that make the formation runner have the controllability, it is more sanitary and healthy, combine the slope position of shell inner wall, make the plug warp and receive certain restriction, avoid the sealed effect of the backswing influence of shell inner wall, and device simple structure, it is lower to be convenient for manufacturing and manufacturing cost.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is an exploded view of the positive-pressure needleless connector of the present invention;

fig. 2 is a cross-sectional view of the positive pressure needleless connector and the connector of the present invention.

In the figure: 1-shell, 11-upper end of shell, 12-inner wall of shell, 13-lug, 2-rubber plug, 21-upper end of rubber plug, 22-side wall of rubber plug, 23-lower end of rubber plug, 24-communicating groove, 25-shoulder of rubber plug, 26-inner cavity, 3-end cover, 31-vent hole, 32-side wall of end cover, 33-liquid outlet and 4-connecting joint.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1-2, the preferred embodiment of the present invention is shown.

The positive-pressure needleless connector comprises a shell 1, wherein the shell 1 is hollow and is internally provided with a rubber plug 2, the upper part of the rubber plug 2 is provided with a rubber plug upper end part 21, the rubber plug upper end part 21 and the inner wall 12 of the shell form a sealing structure, the lower part of the rubber plug 2 is provided with a rubber plug lower end part 23, the rubber plug lower end part 23 is sleeved on an end cover side wall 32, an inner cavity 26 is arranged in the rubber plug 2, the upper part of the inner cavity 26 is provided with a communicating groove 24, the lower part of the inner cavity 26 is communicated with exhaust holes 31 on two sides in the end cover 3, the tail ends of the exhaust holes 31 are communicated with the outside, a liquid outlet 33 is further arranged on the end cover 3 on the lower part of the exhaust holes 31 so that medicine can flow out from the.

In this embodiment, 2 outsides of plug are provided with plug lateral wall 22, and plug lateral wall 22 is the screw thread shape, and it is little to account for the space, is convenient for simultaneously compressed the emergence deformation, also is convenient for recover.

In this embodiment, the bottom end of the housing 1 extends to the end cover 3, and the end cover 3 is connected with the housing 1 in a thread sealing manner, so as to realize that the inside of the housing 1 is communicated with the inside of the end cover 3 to form a flow passage.

In this embodiment, the sealing structure includes the slope profile that sets up on the shell inner wall 12, the upper portion of slope profile and the upper end 21 of the rubber stopper are inconsistent and are formed upper portion sealed, the upper portion of rubber stopper 2 still is provided with rubber stopper shoulder 25, rubber stopper shoulder 25 and the lower part of slope profile are inconsistent and are formed middle part sealed, upper portion is sealed when bulldozing through external connection joint 4, the upper end 21 is in axial plane removal and until reaching shell 1 middle part, just separate the runner that just forms the liquid medicine between shell inner wall 12 and the upper end 21 of the rubber stopper, can avoid forming the runner prematurely and bring external bacterium dust etc. into the infusion liquid, guaranteed the cleanness of infusion liquid, sanitary safety.

In this embodiment, a protrusion 13 is disposed on an upper outer wall of the housing 1, and the protrusion 13 is integrally formed with the housing 1, so as to facilitate taking the housing 1.

In this embodiment, the communicating groove 24 extends from the inner wall 12 of the housing to the upper end portion 11 of the housing, and the upper end of the communicating groove 24 is flush with the upper end portion 11 of the housing, the upper end portion 21 of the rubber plug abuts against the external connecting joint 4, the internal diameter of the connecting joint 4 is communicated with the communicating groove 24, the connecting joint 4 pushes and presses downwards to make the upper end portion 21 of the rubber plug contact with the middle portion of the housing, the inner wall 12 of the housing forms a flow guide channel, the liquid medicine flows in from the communicating groove 24 and flows through a liquid outlet through the inner wall of the housing, after the external force of the connecting joint 4 is removed, the exhaust hole 31 sucks air from the outside into the inner cavity 26, the rubber plug 2 continuously recovers, finally, the upper portion of the slope profile abuts against the upper end portion.

In the technical scheme, as the side wall 23 of the rubber plug is in a thread shape, when the rubber plug is pushed and pressed by the external connecting joint 4, the upper end part 21 of the rubber plug moves in an axial plane until the middle part of the shell 1 is reached, namely a flow channel of liquid medicine is formed only by separating the inner wall 12 of the shell from the upper end part 21 of the rubber plug, the situation that the external bacterial dust and the like are brought into infusion liquid by forming the flow channel too early can be avoided, the cleanness, sanitation and safety of the infusion liquid are ensured, in addition, the liquid in the connecting joint 4 enters the inside of the channel between the rubber plug 2 and the shell 1 through the communicating groove 24, when the rubber plug 2 is used, the inner cavity 26 is deformed firstly when being pressed, the upper end part 21 of the rubber plug always moves downwards along the inner wall 12 of the shell in a plane shape, when the upper end part 21 of the rubber plug is not separated from the inner wall 12 of the shell, more sanitary and healthy, combine the slope position of shell inner wall 12 for plug 2 warp and receives certain restriction, avoids the sealed effect of the back swing influence of shell inner wall 12, and device simple structure, and the manufacturing and manufacturing of being convenient for and manufacturing cost are lower.

The details of the present invention are well known to those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Malleation needleless connecting piece, its characterized in that: the improved rubber plug structure comprises an outer shell, the outer shell is internally hollow and is internally provided with a rubber plug, the upper portion of the rubber plug is provided with an upper end part of the rubber plug, the upper end part of the rubber plug and the inner wall of the outer shell form a sealing structure, the lower portion of the rubber plug is provided with a lower end part of the rubber plug, the lower end part of the rubber plug is sleeved on the side wall of an end cover, an inner cavity is arranged in the rubber plug, the upper portion of the inner cavity is provided with a communicating groove, the lower portion of the inner cavity is communicated with exhaust holes in two sides.

2. The positive pressure needleless connector of claim 1, wherein: the rubber plug is characterized in that a rubber plug side wall is arranged outside the rubber plug, and the rubber plug side wall is in a threaded shape.

3. The positive pressure needleless connector of claim 2, wherein: the bottom end of the shell extends to an end cover, and the end cover is in threaded sealing connection with the shell.

4. The positive pressure needleless connector of claim 3, wherein: the sealing structure comprises a slope profile arranged on the inner wall of the shell, and the upper part of the slope profile is abutted against the upper end of the rubber plug to form upper sealing.

5. The positive pressure needleless connector of claim 4, wherein: the upper portion of plug still is provided with the plug shoulder, the plug shoulder is inconsistent with the lower part of slope profile and is formed middle part sealed.

6. The positive pressure needleless connector of claim 5, wherein: the outer wall of the upper part of the shell is provided with a convex block, and the convex block and the shell are integrally formed.

7. The positive pressure needleless connector of claim 6, wherein: the communicating groove extends out of the inner wall of the shell to the upper end part of the shell, and the upper end of the communicating groove is flush with the upper end part of the shell.

8. The positive pressure needleless connector of claim 7, wherein: the upper end of the rubber plug is abutted against an external connecting joint, the connecting joint pushes and presses downwards to enable the middle part of the shell at the upper end of the rubber plug, the inner wall of the shell forms a flow guide channel, and liquid medicine flows through the liquid outlet through the inner wall of the shell.

9. The positive pressure needleless connector of claim 8, wherein: after the external force of the connecting joint is cancelled, the exhaust hole sucks air from the outside and enters the inner cavity, the rubber plug is continuously restored, finally, the upper part of the slope profile is abutted with the upper end part of the rubber plug to form upper part sealing, and the shoulder part of the rubber plug is abutted with the lower part of the slope profile to form middle part sealing.