CN210020665U

CN210020665U - Syringe and injector

Info

Publication number: CN210020665U
Application number: CN201920687696.8U
Authority: CN
Inventors: 王五星; 金永
Original assignee: Shenzhen Ante Medical Ltd By Share Ltd
Current assignee: Shenzhen Ante Medical Ltd By Share Ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-02-07
Anticipated expiration: 2029-05-14

Abstract

The utility model discloses a cylinder and syringe, wherein, this cylinder includes: the syringe comprises a syringe body, a syringe body and a syringe handle, wherein the syringe body is provided with a containing cavity, and the containing cavity is provided with an opening end and a connecting end which are oppositely arranged; the liquid inlet pipe is arranged on the outer surface of the connecting end, and the connecting end is provided with a liquid inlet communicated with the containing cavity and the liquid inlet pipe; and the liquid outlet pipe is arranged on the outer surface of the connecting end and is arranged at an interval with the liquid inlet pipe, and the connecting end is provided with a liquid outlet which is communicated with the accommodating cavity and the liquid outlet pipe. The technical proposal of the utility model can avoid injecting air bubbles into the human body, thereby improving the safety of transfusion.

Description

Syringe and injector

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a needle cylinder and an injector.

Background

The injector comprises a syringe and a piston assembly slidably connected with the syringe. Currently, syringes have only one outlet tube, which is used not only for aspirating liquids but also for injecting liquids. However, when the piston assembly is moved to suck liquid, bubbles are generated in a liquid suction negative pressure state, and when the outlet pipe is used for injection, the bubbles enter a human body along with the injection process to form air embolism, so that certain potential safety hazard is brought.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a syringe and an injector, aiming at avoiding injecting air bubbles into the human body, thereby improving the safety of transfusion.

In order to achieve the above object, the present invention provides a syringe, comprising:

the syringe comprises a syringe body, a syringe body and a syringe handle, wherein the syringe body is provided with a containing cavity, and the containing cavity is provided with an opening end and a connecting end which are oppositely arranged;

the liquid inlet pipe is arranged on the outer surface of the connecting end, and the connecting end is provided with a liquid inlet communicated with the containing cavity and the liquid inlet pipe; and

the liquid outlet pipe is arranged on the outer surface of the connecting end and is arranged at intervals with the liquid inlet pipe, and the connecting end is communicated with the accommodating cavity and a liquid outlet of the liquid outlet pipe.

Further, the distance between the liquid inlet and the opening end is equal to the distance between the liquid outlet and the opening end.

Furthermore, the liquid inlet pipe and the liquid outlet pipe are symmetrically distributed on two sides of the axis of the needle cylinder body.

Furthermore, the connecting end is arranged in a conical shape or a circular truncated cone shape.

Furthermore, the outer surface of the connecting end is provided with a reinforcing rib.

Further, the open end is provided with a flange.

Further, the peripheral wall of the flange is provided with a stop surface.

Further, the needle cylinder is of an integrally formed structure.

The utility model also provides an injector, this injector includes piston assembly and above-mentioned cylinder, piston assembly with cylinder sliding connection.

Further, the piston assembly comprises a piston, the inner wall of the needle cylinder is provided with a step which extends outwards and can accommodate the resilience of the piston, and the step is arranged adjacent to the opening end.

The utility model discloses technical scheme carries out the feed liquor and annotates the liquid through setting up feed liquor pipe and drain pipe alone, avoids the bubble to get into the human body. During the feed liquor, liquid passes through the feed liquor pipe and gets into holding the intracavity, has the bubble this moment and passes through the feed liquor pipe along with liquid and get into and hold the intracavity to can concentrate near the feed liquor. During liquid injection, the bubbles enter the liquid inlet pipe from the liquid inlet under the extrusion of the piston, so that the bubbles are prevented from entering a human body along with the liquid injection process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of the syringe of the present invention;

FIG. 2 is a cross-sectional view of the barrel of FIG. 1;

fig. 3 is a bottom view of the cartridge of fig. 1.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a syringe 100.

Referring to fig. 1 to 3, the syringe 100 includes:

the syringe comprises a syringe body 10, wherein the syringe body 10 is provided with a containing cavity 15, and the containing cavity 15 is provided with an opening end 11 and a connecting end 12 which are oppositely arranged;

the liquid inlet pipe 20 is arranged on the outer surface of the connecting end 12, and the connecting end 12 is provided with a liquid inlet 21 for communicating the containing cavity 15 and the liquid inlet pipe 20; and

and the liquid outlet pipe 30 is arranged on the outer surface of the connecting end 12 and is arranged at an interval with the liquid inlet pipe 20, and the connecting end 12 is provided with a liquid outlet 31 for communicating the accommodating cavity 15 with the liquid outlet pipe 30.

In this embodiment, one side of syringe body 10 is equipped with link 12, and link 12 and syringe body 10 enclose to close and form and hold chamber 15, hold chamber 15 and be used for holding liquid, and syringe 100 can select for use transparent material, is convenient for observe the liquid situation in holding chamber 15, for example PC, PET or PP etc. do not do the restriction here. The syringe 100 may be an integrally formed structure, that is, the syringe body 10, the liquid inlet tube 20 and the liquid outlet tube 30 are integrally formed, which is convenient for processing.

In the technical scheme of the utility model, imbibition and infusion are carried out through setting up feed liquor pipe 20 and drain pipe 30 alone. Upon inlet of the liquid, the liquid enters the chamber 15 through the inlet pipe 20 and accumulates in the vicinity of the inlet port 21. During liquid injection, air bubbles enter the liquid inlet pipe 20 from the liquid inlet 21 under the extrusion of the piston, so that the air bubbles are prevented from entering a human body from the liquid outlet pipe 30 along with the liquid injection process, and the safety of the liquid injection is improved.

The syringe 100 is generally used in combination with an infusion device (not shown), and when in use, the liquid inlet tube 20 is communicated with a liquid inlet pipeline (not shown), the liquid outlet tube 30 is communicated with a liquid outlet pipeline (not shown), the liquid inlet pipeline is provided with a liquid inlet valve, and the liquid outlet pipeline is provided with a liquid outlet valve. When liquid is fed, the liquid inlet valve is opened and the liquid outlet valve is closed; and when liquid is discharged, the liquid outlet valve is opened and the liquid inlet valve is closed.

Referring to fig. 2, the distance between the liquid inlet 21 and the open end 11 is equal to the distance between the liquid outlet 31 and the open end 11.

In this embodiment, the distance between the liquid inlet 21 and the open end 11 is equal to the distance between the liquid outlet 31 and the open end 11, as shown in fig. 2, the distance between the liquid inlet 21 and the open end 11 and the distance between the liquid outlet 31 and the open end 11 are both L, that is, the liquid inlet 21 and the liquid outlet 31 are located on the same horizontal plane. It is understood that the central holes of the liquid inlet port 21 and the liquid outlet port 31 are located on the same horizontal plane, or the lowest point of the liquid inlet port 21 and the lowest point of the liquid outlet port 31 are located on the same horizontal plane. Such arrangement of liquid inlet 21 and liquid outlet 31 facilitates movement of bubbles toward liquid inlet 21 during liquid injection. Further, the liquid inlet tube 20 and the liquid outlet tube 30 are disposed adjacent to the side wall of the cylinder body 10, so that the distance between the liquid inlet port 21 and the liquid outlet port 31 becomes large, preventing air bubbles from being discharged from the liquid outlet port 31.

Referring to fig. 1 and 2, the liquid inlet pipe 20 and the liquid outlet pipe 30 are symmetrically distributed on both sides of the axis of the syringe body 10.

Specifically, feed liquor pipe 20 and drain pipe 30 symmetric distribution are in the both sides of cylinder body 10 axis to feed liquor pipe 20 and drain pipe 30's length equals, make cylinder 100 be the symmetry setting, thereby make the fixed of cylinder 100 more stable, when feed liquor pipe 20 and drain pipe 30's length is equal, and any one in two pipes all can regard as feed liquor pipe 20, and another regards as drain pipe 30. Of course, the lengths of the inlet pipe 20 and the outlet pipe 30 may not be equal, and are not limited herein.

Specifically, the connecting end 12 is disposed in a conical shape or a circular truncated cone shape.

In this embodiment, the connecting end 12 is in a conical or truncated cone shape, that is, the cross section of the connecting end 12 is in a triangular or trapezoidal shape, so that the area of the inner wall of the connecting end 12 is increased, and bubbles can be attached to the inner wall, thereby providing more attachment areas for the bubbles. It will be appreciated that the highest point of the connecting end 12 may be located higher than the outlet 31, where bubbles may collect, thereby preventing bubbles from exiting the outlet 31.

Further, a rib (not shown) is provided on the outer surface of the connection end 12.

Preferably, the outer surface of the connecting end 12 is provided with a plurality of reinforcing ribs uniformly distributed on the outer surface of the connecting end 12. In the process of injecting liquid, high pressure can be generated in the needle cylinder 100, the high pressure easily causes the damage of the connecting end 12, the arrangement of the reinforcing ribs increases the structural strength of the connecting end 12, medical accidents caused by the damage of the connecting end 12 are avoided, and the safety performance of the needle cylinder 100 is improved.

Referring to fig. 1 to 3, the opening end 11 is provided with a flange 14.

In this embodiment, the open end 11 of the syringe 100 is provided with the flange 14, the flange 14 is formed by extending the open end 11 outwards, the flange 14 increases the contact area, so as to fix the syringe 100 when in use, and facilitate holding by an operator, thereby preventing the syringe 100 from falling off and causing liquid to spill due to sliding when holding, and avoiding waste of resources.

Referring to fig. 1 and 3, the peripheral wall of the flange 14 is provided with a stop surface 141.

In this embodiment, the outer peripheral wall of the flange 14 is provided with a stop surface 141, and it will be appreciated that rotation is likely to occur during use due to the annular arrangement of the flange 14. When the syringe is fixed, the stop surface 141 can abut against other parts to limit the position, so as to prevent the syringe 100 from rotating, thereby improving the stability and reliability of the syringe 100.

The utility model discloses still provide an injector (not shown), this injector includes piston assembly (not shown) and cylinder 100, and the concrete structure of this cylinder 100 refers to above-mentioned embodiment, because this injector has adopted all technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not given here again.

Wherein the piston assembly comprises a piston (not shown), the inner wall 16 of the syringe 100 is provided with an outwardly extending step 13 capable of accommodating rebound of the piston, and the step 13 is arranged adjacent to the open end 11.

Specifically, the inner wall 16 of the syringe body 10 is in interference fit with the piston, so that the sealing performance is improved, and air bubbles are prevented from entering the cavity 15 from the open end 11. Since the radial dimension of the step 13 is greater than the radial dimension of the inner wall 16 of the syringe body 10, the step 13 releases the plunger so that the plunger is not in a pressurized state for a long period of time, thereby reducing the amount of compression of the plunger during use. During use, the plunger moves to the step 13, and the portion of the plunger compressed by the interference fit with the inner wall 16 of the syringe body 10 is released, thereby returning the portion to the pre-compressed state. When the portion moves to the inner wall 16 again, the same interference as the previous one can be obtained, thereby improving the sealability between the piston and the cylinder 100.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A syringe, comprising:

2. The syringe of claim 1 wherein said inlet port is spaced from said open end a distance equal to said outlet port.

3. The syringe of claim 2 wherein said inlet conduit and said outlet conduit are symmetrically disposed on opposite sides of said syringe body axis.

4. The syringe of claim 1 wherein said connecting end is conically or frustoconical.

5. The syringe of claim 4 wherein the outer surface of said connecting end is provided with ribs.

6. The barrel according to any one of claims 1 to 5, wherein said open end is provided with a flange.

7. The syringe of claim 6 wherein the peripheral wall of the flange is provided with a stop surface.

8. The syringe of claim 7 wherein said syringe is of unitary construction.

9. An injector comprising a plunger assembly and a barrel according to any one of claims 1 to 8, said plunger assembly being slidably connected to said barrel.

10. The syringe of claim 9 wherein said plunger assembly comprises a plunger, and wherein said barrel has an inner wall provided with an outwardly extending step for accommodating rebound of said plunger, said step being disposed adjacent said open end.