CN211584698U

CN211584698U - Injection needle

Info

Publication number: CN211584698U
Application number: CN201922419161.5U
Authority: CN
Inventors: 巩浩贤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-29
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to the field of surgical instruments, in particular to an injection needle tool, which comprises a needle body component and a driving component, wherein the needle body component is movably arranged in the driving component; the needle body component comprises a needle body and a piston connected to the tail end of the needle body, and the front end of the piston is provided with a groove; the drive assembly includes drive housing, the adapter sleeve subassembly is gone up to drive housing's rear end face, drive housing side connects the feed liquor pipe, drive housing is inside to have a piston chamber, the piston is installed in the piston chamber, this novel related technical scheme injection stability is high, the degree of depth and the speed of contact pin and the quantity of injection and the control that injection speed can all be fine, need not rely on artificial experience, the security is better, it is difficult to control to have solved injection needle utensil injection in-process injection depth and medicine quantity each item parameter, the instability factor increases, the lower problem of factor of safety.

Description

Injection needle

Technical Field

The utility model relates to a surgical instrument field particularly, relates to an injection needle utensil.

Background

At present, with the continuous development of medicine, the safety requirement on medical instruments is increasing day by day, the pain of users is reduced, and the stability of injection operation is also continuously pursued in the medical field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an injection needle utensil to solve among the prior art traditional medical treatment needle utensil's syringe needle depth of insertion, injection liquid's injection speed and quantity rely on artificial experience and proficiency completely, each item parameter is difficult to control, causes injection in-process instability factor to increase, the lower problem of factor of safety.

In order to achieve the above object, the utility model adopts the following technical scheme:

an injection needle comprises a needle body component and a driving component, wherein the needle body component is movably arranged in the driving component;

the needle body assembly comprises a needle body and a piston connected to the tail end of the needle body, the front end of the piston is provided with a groove, the piston and the needle body are connected through connecting pieces arranged in a fan shape, a middle hole in the needle body is communicated with the groove at the front end of the piston, and the front end of the needle body is also provided with an output through hole;

the driving component comprises a driving shell, the rear end surface of the driving shell is connected with a pipe component in a connecting mode, the side face of the driving shell is connected with a liquid inlet pipe, a piston cavity is formed in the driving shell, a piston is installed in the piston cavity, and a needle body extends out of the front end of the driving shell; the outer wall of the driving shell is provided with a plurality of liquid conveying pipelines, the front end of each liquid conveying pipeline is provided with a front annular cavity, the rear end of each liquid conveying pipeline is provided with a rear annular cavity, the front annular cavity and the rear annular cavity are communicated with the liquid conveying pipelines, the liquid inlet pipe is communicated with the rear annular cavity, and the front annular cavity is communicated with the piston cavity.

Furthermore, the sleeve assembly comprises a sleeve and a pipeline connected to the sleeve, the sleeve is detachably mounted at the rear end of the driving shell, and the sleeve is communicated with the piston cavity.

Furthermore, the front end of the inner wall of the sleeve is provided with threads, the rear end of the piston cavity is provided with a threaded hole, and the sleeve is connected in the piston cavity through the threads.

Furthermore, a limit sleeve is arranged in the piston cavity and used for limiting the stroke of the piston.

Furthermore, a liquid inlet hole is formed in the outer wall of the driving shell corresponding to the rear annular cavity, the liquid inlet pipe is detachably mounted in the liquid inlet hole, the liquid inlet pipe, the rear annular cavity, the liquid conveying pipeline, the front annular cavity and the piston cavity are communicated, and liquid is input into the needle body from the liquid inlet pipe.

Furthermore, a sealing ring is arranged at the contact position of the front end of the driving shell and the side wall of the needle body.

Furthermore, the infusion pipelines are annularly distributed on the side wall of the driving shell.

The utility model discloses following beneficial effect has:

the injection needle is provided with a driving component, gas or liquid is conveyed into a piston cavity through a pipeline, the back and forth movement of a needle body component in the piston cavity is controlled through air pressure difference, and the insertion depth and the infusion position of the needle body component are controlled; the driving shell is provided with a transfusion pipeline, the medicine enters the piston cavity through the liquid inlet pipe, the rear annular cavity, the transfusion pipeline and the front annular cavity, then enters the needle body from the groove on the piston, and enters the body of a user from the output through hole, the injection speed of the injection mode can be controlled and adjusted in time, and the injection dosage can be better controlled; the injection stability is high, the depth and the speed of the inserting needle and the injection dosage and the injection speed can be well controlled, manual experience is not needed, and the safety is better.

Drawings

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

FIG. 2 is an exploded view of the structure of the present invention;

FIG. 3 is a schematic view of the needle assembly construction;

FIG. 4 is a schematic view of the drive assembly;

FIG. 5 is a schematic view of a drug injection state;

FIG. 6 is a schematic view of the needle assembly movement;

FIG. 7 is a schematic view of the position of the stop collar;

wherein the figures include the following reference numerals: 1 a needle body assembly; 11. a needle body; 12. an output through hole; 13. a piston; 14. connecting sheets; 15. a groove; 2. a drive assembly; 21. a drive housing; 22. a piston cavity; 23. a rear annular cavity; 24. a front annular cavity; 25. a fluid delivery conduit; 26. a limiting sleeve; 27. a liquid inlet hole; 28. a seal ring; 3. a bushing assembly; 31. a sleeve; 32. a pipeline; 4. A liquid inlet pipe.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-7, the injection needle of the present invention comprises a needle body assembly 1 and a driving assembly 2, wherein the needle body assembly is movably mounted in the driving assembly;

the needle body assembly comprises a needle body 11 and a piston 13 connected to the tail end of the needle body, the front end of the piston is provided with a groove 15, the piston and the needle body are connected through a connecting sheet 14 arranged in a fan shape, a middle hole in the needle body is communicated with the groove at the front end of the piston, and the front end of the needle body is also provided with an output through hole 12; the piston cavity can be communicated with the inside of the needle body through the groove, so that the medicine in the piston cavity is conveyed to the inside of the needle body and is injected into the body from the output through hole.

The driving component comprises a driving shell 21, the rear end surface of the driving shell is connected with a connecting sleeve component 3, the side surface of the driving shell is connected with a liquid inlet pipe 4, a piston cavity 22 is arranged in the driving shell, a piston is arranged in the piston cavity, a needle body extends out of the front end of the driving shell, and the needle body moves back and forth along the piston cavity under the pushing of the piston; the contact department of drive casing front end and needle body lateral wall has sealing washer 28, prevents that medicine from flowing out from the gap between drive casing and the needle body (on this definition drive casing, the one end that the needle body wore out is preceding terminal surface, and the other end is the rear end face), and the thimble assembly links up pneumatic pump or other transfer pumps outward, carries piston cavity rear side with gas or liquid from the thimble assembly, through advancing or retreating of atmospheric pressure control plunger, and then realizes the depth of insertion and the plug-in velocity of needle body.

Open on the outer wall of drive casing has a plurality of infusion pipeline 25, infusion pipeline 25 is the annular distribution on drive casing lateral wall, infusion pipeline front end opens has preceding annular chamber 24, rear end opens has back annular chamber 23, preceding annular chamber and rear annular chamber are with infusion pipeline intercommunication, feed liquor pipe and back annular chamber intercommunication, preceding annular chamber and piston chamber intercommunication, the medicine gets into from infusion pipeline, enter into each infusion pipeline through back annular chamber, get into piston chamber front end behind preceding annular chamber set at last, and then enter into the needle body inside through the recess, this kind of transportation process of medicine is favorable to giving the certain buffering of medicine injection process, more be favorable to the intensive mixing medicine.

The drive casing outer wall that corresponds with back annular chamber is opened there is feed liquor hole 27, and feed liquor pipe demountable installation is in the feed liquor hole, and inside feed liquor pipe, back annular chamber, infusion pipeline, preceding annular chamber and the piston chamber intercommunication, inputed the needle body with liquid from the feed liquor pipe, feed liquor pipe demountable installation can be after the use, accomodates the convenience, is convenient for store on drive casing outer wall.

The sleeve assembly comprises a sleeve 31 and a pipeline 32 connected to the sleeve, the sleeve is detachably mounted at the rear end of the driving shell and communicated with the piston cavity; the sleeve front end has the screw thread, and piston chamber rear end has the screw hole, and the sleeve passes through threaded connection in the piston chamber, and sleeve subassembly demountable installation also is favorable to used repeatedly and collects the facility at drive casing rear end.

As shown in figure 7, the piston cavity is provided with a limit sleeve 26, and the limit sleeve is positioned at the rear end of the front annular cavity and used for limiting the stroke of the piston and preventing the piston from exceeding the front annular cavity to influence the medicine injection process.

The utility model discloses a use as follows:

the end of the pipeline is connected with an air pump or other pressure delivery devices, the liquid inlet pipe is connected with a medicine output device, and the needle body is inserted into the process: air pump or other pressure transmission device are to piston chamber rear side output pressure, and the pressure of piston chamber rear side risees, and the promotion piston advances, and is ejecting forward with the needle body, and the advancing speed and the stroke of needle body can be controlled to output pressure's size and time, and then accomplish the needle body and insert the process, after the needle body inserted the target degree of depth, stop pressure output, carry out the medicine injection process: medicine is inputed into back annular chamber from the feed liquor pipe, through the infusion pipeline, preceding annular chamber is after, enter into piston chamber front end, get into inside the needle body from the piston recess, it is internal to enter into from the output through-hole, thus, the injection volume of control medicine that can be better, can also realize the staged injection of the different degree of depth, the controllability is stronger, after the injection is accomplished, air pump or other defeated pressure equipment will be pumpback, it becomes the negative pressure to take out piston chamber rear side, the piston resets, the needle body is extracted internally, whole contact pin, the process controllability of injection and pulling out the needle is stronger, and the quantity of speed and medicine can all be controlled, need not receive the restriction of how much of the medicine storage volume in the traditional needle tube, can also realize the continuous injection under the different injection depths, and convenient for operation, need not rely on artificial experience, the security.

In the description of the present invention, it should be noted that the terms "front end", "rear end", "left and right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. An injection needle is characterized by comprising a needle body component (1) and a driving component (2), wherein the needle body component (1) is movably arranged in the driving component (2);

the needle body assembly (1) comprises a needle body (11) and a piston (13) connected to the tail end of the needle body (11), wherein the front end of the piston (13) is provided with a groove (15), the piston (13) and the needle body (11) are connected through connecting sheets (14) arranged in a fan shape, a middle hole in the needle body (11) is communicated with the groove (15) in the front end of the piston (13), and the front end of the needle body (11) is also provided with an output through hole (12);

the driving assembly (2) comprises a driving shell (21), the rear end face of the driving shell (21) is connected with the sleeve assembly (3), the side face of the driving shell (21) is connected with the liquid inlet pipe (4), a piston cavity (22) is formed in the driving shell (21), the piston (13) is installed in the piston cavity (22), and the needle body (11) extends out of the front end of the driving shell (21); a plurality of liquid conveying pipelines (25) are arranged on the outer wall of the driving shell (21), a front annular cavity (24) is arranged at the front end of each liquid conveying pipeline (25), a rear annular cavity (23) is arranged at the rear end of each liquid conveying pipeline (25), the liquid conveying pipelines (25) are communicated by the front annular cavity (24) and the rear annular cavity (23), the liquid inlet pipe (4) is communicated with the rear annular cavity (23), and the front annular cavity (24) is communicated with the piston cavity (22).

2. An injection needle device according to claim 1, wherein the cannula assembly (3) comprises a sleeve (31) and a conduit (32) connected to the sleeve (31), the sleeve (31) being removably mounted at the rear end of the drive housing (21), the sleeve (31) being in communication with the piston chamber (22).

3. An injection needle unit according to claim 2, wherein the sleeve (31) is threaded at the forward end of its inner wall and the piston chamber (22) is threaded at the rearward end, the sleeve (31) being threadedly engaged in the piston chamber (22).

4. An injection needle device according to claim 1, characterized in that the piston chamber (22) is provided with a stop collar (26) for limiting the stroke of the piston (13).

5. The injection needle set according to claim 1, wherein the outer wall of the driving housing (21) corresponding to the rear annular chamber (23) is provided with a liquid inlet hole (27), the liquid inlet pipe (4) is detachably mounted in the liquid inlet hole (27), and the liquid inlet pipe (4), the rear annular chamber (23), the liquid delivery pipe (25), the front annular chamber (24) and the piston chamber (22) are communicated to deliver the liquid from the liquid inlet pipe (4) to the inside of the needle body (11).

6. An injection needle according to claim 1, characterized in that the front end of the drive housing (21) is provided with a sealing ring (28) in contact with the side wall of the needle body (11).

7. Injection needle according to claim 1, wherein the infusion line (25) is distributed annularly on the side wall of the drive housing (21).