CN113941051B

CN113941051B - Multi-tube injector

Info

Publication number: CN113941051B
Application number: CN202110011152.1A
Authority: CN
Inventors: 彭江; 程曦; 孟昊业; 王振国; 汪爱媛; 周皓; 刘伟; 张星燕; 潘超; 许文静
Original assignee: Chinese PLA General Hospital; Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Chinese PLA General Hospital; Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2022-06-17
Anticipated expiration: 2041-01-06
Also published as: CN113941051A

Abstract

The invention relates to the technical field of medical instruments, and provides a multi-tube injector. The method comprises the following steps: the syringe comprises a syringe needle, a top cover, a neck ring, a neck column, a switching pad, a syringe, a stirring rod, a powder sealing plug, a liquid sealing plug and a pushing rod, wherein the syringe comprises a plurality of tube cavities capable of containing a plurality of different medicines; the needle cylinder is provided with through holes on the top surface corresponding to each tube cavity, a plurality of the through holes can be matched with the grooves on the bottom surface of the adapter pad, and medicines enter other tube cavities from one tube cavity through the grooves to be mixed. The invention has the beneficial effects that: simple structure, convenient to use, high integration can load multiple medicine on a syringe, can realize the homogeneous mixing in proper order of multiple medicine simultaneously, still can guarantee in addition that this process of dispensing goes on under aseptic condition, has improved the efficiency of dispensing and the validity of use greatly.

Description

Multi-tube injector

Technical Field

The invention relates to the field of medical instruments, in particular to a multi-tube injector.

Background

Syringes are widely used for drug administration and drug injection. Because a plurality of medicines are required to be mixed and used together, different medicines are contained in different injectors in the traditional mode, then the different medicines are mixed in a mixing container and transferred to another injector for injection, the process is complicated, required components are multiple, in addition, all the medicines are easy to expose outside, the medicines are easy to be polluted by the outside, and adverse reactions are easy to generate when the medicines are injected into a human body. In order to solve the above problems, a conventional multi-tube injector is provided in the market, the injector is provided with a plurality of tubes simultaneously, so that various medicines can be contained, and the medicines in the plurality of tubes are pushed out simultaneously during injection, so that the simultaneous injection of various medicines is realized.

However, although the above multi-tube syringe achieves a convenient and quick function without exposure to the outside, how to ensure uniform mixing of various medicines at the time of injection, especially if the medicines are powdered medicines, the syringe completely loses its function. Therefore, it is necessary to design a multifunctional syringe which can realize multi-tube integration, and can sequentially and uniformly mix a plurality of medicines and realize injection under a sealed condition, so as to solve the above problems.

Disclosure of Invention

The invention aims to provide a multi-tube injector to solve the technical problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a multi-tube injector, comprising: the syringe comprises a needle head, a top cover, a neck ring, a neck post, a connecting pad, a syringe, a stirring rod, a powder sealing plug, a liquid sealing plug and a pushing rod, wherein the syringe comprises a plurality of tube cavities capable of containing a plurality of different medicines; the needle cylinder is provided with through holes on the top surface corresponding to each tube cavity, a plurality of the through holes can be matched with the grooves on the bottom surface of the switching pad, and medicines enter other tube cavities from one tube cavity through the grooves to be mixed; the adapter pad and the circumferential convex thin wall of the needle cylinder are coaxial, the bottom surface of the adapter pad is provided with a plurality of grooves and through holes, the positions of the grooves and the through holes on the adapter pad are adjusted by rotation, so that the grooves are communicated with different tube cavities of the needle cylinder, and the medicine is pushed out from one tube cavity of the needle cylinder, flows through the grooves on the adapter pad and enters the other tube cavity of the needle cylinder; the transfer pad is made of an elastic sealing material, a plurality of concave holes are formed in the top surface of the transfer pad, and a plurality of protruding columns are arranged on the bottom surface of the neck column and matched with the concave holes in the top surface of the transfer pad; a cylindrical barrel is arranged on the top surface of the neck post, the axis of the cylindrical barrel is a through hole, the through hole of the cylindrical barrel penetrates through the neck post, and the through hole of the cylindrical barrel and the through hole of the transfer pad are coaxial; a first circumferential protruding beam along the radial direction is arranged on the outer side of the middle part of the cylindrical barrel, and an internal thread structure matched with the external thread structure of the needle base at the bottom of the needle head is arranged at the top of the cylindrical barrel; and the top surface of the neck post is provided with a convex part matched with the through hole on the top cover.

In an optional embodiment, the number of the tube cavities of the syringe is more than 2.

In an optional embodiment, the top surface of the needle cylinder is provided with a circumferential bulge thin wall, and the outer side of the top of the circumferential bulge thin wall is provided with two arc-shaped beams which are radially and externally bulged and are in central symmetry; the neck ring and the circumferential convex thin wall of the needle cylinder are coaxial, and two arc-shaped beams which are radially convex and are centrosymmetric are arranged on the inner side of the middle part of the neck ring; and the two arc-shaped beams of the circumferential protruding thin wall are mechanically matched with the two arc-shaped beams on the inner side of the middle part of the neck ring to fix the neck ring on the top surface of the needle cylinder.

In an optional embodiment, two arc-shaped beams which are radially protruded and are centrosymmetric are arranged on the inner side of the top of the neck ring, and the neck post and the adapter pad are embedded into the circumferential raised thin wall of the needle cylinder and can rotate along the axial direction; and the side surface of the outer part of the neck ring is provided with scale marks for marking the unnecessary passages.

In an optional embodiment, the top cover is of a shell structure, a plane eccentric part outside the top cover is outwards provided with a circular thin-wall bulge hole, the circular thin-wall bulge and the cylindrical barrel of the neck post are coaxially sleeved and matched, and a circular bulge beam II which is outwards along the radial direction is arranged on the inner side of the middle part of the circular thin-wall bulge of the top cover and is matched with the circular bulge beam I which is outwards along the radial direction on the outer side of the middle part of the cylindrical barrel; the inner plane of the top cover is provided with a protruding structure along the axial direction, the protruding structure is in contact with the top surface of the neck post, and protruding structures are arranged on two sides of the top cover.

In an optional embodiment, the needle head is made of stainless steel, the needle head is a straight needle tube or a bent needle tube, and the needle point of the needle head is a flat opening or a bevel opening.

In an optional embodiment, the stirring rod is placed in the tube cavity through the powder sealing plug, the top of one end, extending into the tube cavity, of the powder sealing plug is provided with a plurality of stirring teeth symmetrically distributed along the axial center, and one end, extending out of the tube cavity, of the stirring rod is provided with a stirring handle; the central axial direction of the powder sealing plug is a hole, and the stirring rod is embedded into the hole for clearance fit; the powder sealing plug is in interference fit with the tube cavity of the needle cylinder; the top of the powder sealing plug is made of elastic material.

In an optional embodiment, the liquid sealing plug is made of an elastic solid material, and the liquid sealing plug is in interference fit with the tube cavity of the needle cylinder; one end of the liquid sealing plug is of a step structure; the pushing rod is of a cylindrical structure with an arc groove, the inner diameter of the arc groove is distributed in two sections, the top section of the pushing rod is in interference fit with the step structure of the liquid sealing plug, and the outer section of the pushing rod is in clearance fit with the outer diameter of the stirring rod; the push rod is provided with an inclined plane bulge near the outer section.

The invention has the beneficial effects that:

(1) the multi-tube injector provided by the invention is provided with a plurality of tube cavities, can contain a plurality of medicines simultaneously, and realizes the transfer and mixing of the medicines through the switching device. Compared with the prior art, the injector is completely sealed, and the medicine is not exposed to the outside, so that the outside pollution is avoided.

(2) The multi-tube injector realizes the transfer and mixing of various medicines through the switching design part (switching pad), can ensure that the medicines are in a uniform mixing state when in use, and simultaneously, the design of the stirring rod can mix solid medicines, thereby solving the problem that other injectors cannot inject powder medicines. In addition, the injector is highly integrated, is easy and convenient to operate when in use, and obviously improves the working efficiency of users.

Drawings

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

FIG. 1 is a schematic diagram illustrating the assembly of a multi-tube injector according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of the components of a multi-tube injector according to one embodiment of the present invention;

FIG. 3 is a schematic view of a needle tip structure according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a top cover structure according to an embodiment of the present invention;

FIG. 5 is a schematic view of a collar structure according to an embodiment of the present invention;

FIG. 6 is a schematic view of a neck post structure according to an embodiment of the present invention;

FIG. 7 is a schematic view of an embodiment of an adapter pad structure;

FIG. 8 is a schematic view of a syringe according to an embodiment of the present invention;

FIG. 9 is a schematic view of a stirring rod according to an embodiment of the present invention;

fig. 10 is a schematic view of a powder sealing plug according to an embodiment of the present invention;

fig. 11 is a schematic view of a liquid sealing plug according to an embodiment of the present invention;

FIG. 12 is a schematic view of a push rod according to an embodiment of the present invention;

fig. 13 is a schematic view illustrating a process of mixing different medicines by matching the adapter pad and the syringe according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, 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.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

Referring to fig. 1 and 2, the present embodiment provides a multi-tube injector including: the device comprises a needle head 1, a top cover 2, a neck ring 3, a neck post 4, a connecting pad 5, a needle cylinder 6, a stirring rod 7, a powder sealing plug 8, a liquid sealing plug 9 and a push rod 10. The syringe 6 comprises a plurality of cavity tubes of a liquid cavity and a powder cavity and can contain a plurality of different medicaments.

Referring to fig. 8, the cylinder 6 of the multi-tube injector includes a first chamber 61, a second chamber 62 and a third chamber 63, and a first through hole 611, a second through hole 621 and a third through hole 631 corresponding to the respective chambers are formed on the top surface of each chamber. The cylinder 6 has a circumferential projection wall 64 on its top surface, and 2 arc-shaped beams 641 which are radially outwardly projected and are symmetrical with respect to the center are provided on the outer side of the circumferential projection wall 64.

Referring to fig. 7, the adapter pad 5 of the multi-tube syringe is installed coaxially with the circumferential projection thin wall 64 of the cylinder 6, the thickness of the adapter pad 5 is equal to the height of the circumferential projection thin wall 64, and the adapter pad 5 can be placed in the circumferential projection thin wall 64. The bottom surface of the transfer pad 5 is provided with a groove 51 and a groove 52, meanwhile, the bottom surface of the transfer pad 5 is provided with a through hole four 53, and the bottom surface of the transfer pad 5 can adjust the positions of the groove 51, the groove 52 and the through hole four 53 on the transfer pad 5 through rotation to enable the positions to correspond to the through hole one 611, the through hole two 621 and the through hole three 631 of different cavity tubes of the syringe 6, so that the medicine is pushed out from one cavity tube of the syringe 6, flows through the groove 51 or the groove 52 on the transfer pad 5 and enters the other cavity tube of the syringe 6. The top surface of the landing pad 5 has a plurality of concave holes 54. The material of the pad 5 is an elastic material, including but not limited to silicone, which can be tightly attached to the top plane of the syringe 6.

Referring to fig. 13, in one embodiment, the adaptor pad 5 is mated with the syringe 6 to achieve sterile mixing of different drugs as follows:

step i, referring to fig. 13, in a storage state, the second through hole 621 and the third through hole 631 at the tops of the second lumen 62 and the third lumen 63 for containing liquid are tightly attached to the adapter pad 5, and the liquid is sealed in the corresponding lumens of the syringe 6;

step ii, the needle cylinder 6 is fixed, and the pivoting pad 5 is rotated clockwise by a certain angle to reach the position shown in fig. 13 (c). At this time, the groove 52 on the adapter pad 5 is connected with the second through hole 621 and the third through hole 631 on the syringe 6, and the liquid sealing plug 9 of the lumen three 63 is pushed, so that the liquid in the lumen three 63 enters the lumen two 62 to be mixed because the lumen two 62 and the lumen three 63 are connected through the second through hole 621, the third through hole 631 and the groove 52.

Step iii, the needle cylinder 6 is fixed, and the rotating pad 5 is rotated clockwise by a certain angle to reach the position shown in the third drawing 13. At this time, the groove 51 on the adapter pad 5 is connected with the first through hole 611 and the second through hole 621 on the syringe 6, and at this time, the liquid sealing plug 9 of the second lumen 62 is pushed, and since the first lumen 61 and the second lumen 62 are connected through the first through hole 611, the second through hole 621 and the groove 51, the mixed liquid in the second lumen 62 enters the first lumen 61 to be mixed.

Step iv, the needle cylinder 6 is fixed, and the pivoting pad 5 is rotated clockwise by a certain angle to reach the position shown in the attached figure 13 ((r)). At this time, the through hole four 53 on the adapter pad 5 is connected with the through hole one 611 on the syringe 6, and the sealing plug 10 of the lumen one 61 is pushed, so that the mixed mixture can be pushed out from the lumen one 61 through the through hole one 611 and the through hole four 53.

Referring to fig. 6, the bottom surface of the neck post 4 of the multi-tube injector has a plurality of protruding columns 41, the distribution and specification of the plurality of protruding columns 41 match with the concave holes 54 on the top surface of the adapter pad 5, and the protruding columns 41 on the bottom surface of the neck post 4 can be embedded into the concave holes 54, so as to realize the tight connection between the adapter pad 5 and the neck post 4. The top surface of the neck post 4 is provided with a cylinder 42, the center of the cylinder shaft is provided with a five through hole 421, and the five through hole 421 penetrates through the neck post 4. After the adapting pad 5 is matched with the neck post 4, the five through holes 421 and the four through holes 53 are coaxial, so that the mixed medicine flows out through the through holes 53 and the through holes 421.

Meanwhile, the neck post 4 of the multi-tube injector has a first circumferential projection beam 422 in the radial direction outside the middle of the cylinder 42 and an internal thread structure 423 on the top of the cylinder 42.

In addition, the top surface of the neck 4 of the multi-tube injector has raised features 43, including but not limited to squares, to facilitate engagement with the cap 2.

Referring to figure 5, the collar 3 of the multi-barrel injector is concentric with the top circumferential raised wall 64 of the barrel 6, and the inside of the middle of the collar 3 has 2 radially inwardly projecting centrosymmetric arcuate beams 31 which interlock with the outer arcuate beam 641 of the barrel 6. Meanwhile, the inner side of the top of the neck ring 3 is provided with 2 arc beams 32 which are radially and inwardly protruded and are centrosymmetric, the arc beams 32 can axially rotate after the thin wall 64 is protruded on the circumference of the top of the needle cylinder 6 embedded in the neck post 4 and the rotating connection pad 5, and the neck post 4 can be prevented from being separated.

Meanwhile, the external side surface of the neck ring 3 is provided with different scale marks, so that the neck post 4 and the adapter pad 5 can be conveniently rotated to different positions, and external marking and indication can be carried out when different tube cavities form passages.

Referring to fig. 4, the top cap 2 of the multi-tube syringe is of a housing structure. The eccentric part of the external plane of the top cover 2 is provided with a circumferential thin-wall bulge hole 21 outwards, the circumferential thin-wall bulge hole 21 and the cylindrical cylinder 42 of the neck post 4 are coaxially sleeved and matched, the inner side of the middle part of the circumferential thin-wall bulge hole 21 of the top cover 2 is provided with a circumferential bulge beam II 211 which bulges outwards along the radial direction and is matched with the circumferential bulge beam I422 of the outer side of the neck post 4 along the radial direction, and the top cover 2 is prevented from being pulled out outwards along the axial direction of the cylindrical cylinder 42 of the neck post 4 in the vertical direction. Meanwhile, the inner plane of the top cover 2 is provided with a protruding structure 22 along the axial direction, and the protruding structure 22 is contacted with the top surface of the neck post 4 to prevent the top cover 2 from sliding inwards along the axial direction. In addition, the top surface of the top cover 2 is provided with a square through hole 23, but not limited to, the top surface of the neck post 4 is provided with a square protruding part 43 which can be inserted into the square through hole 23, and the two are in interference fit, so that the rotation between the top cover 2 and the neck post 4 is prevented. Furthermore, the top cover 2 has protruding structures 24 on both sides for the convenience of the user.

Referring to fig. 3, the bottom needle seat 11 of the needle 1 of the multi-tube injector is of an external thread structure, and the needle seat 11 can be in bolt fit with the internal thread structure 423 of the cylindrical barrel 42 on the top surface of the neck post 4, so as to achieve the purpose of firmer fit. In addition, the needle head 1 is a stainless steel tube 12 which can be a straight needle tube or a curved needle tube; the needle point can be flat, inclined and the like, the specification of the needle tube is not limited, and the needle tube is selected according to the actual requirement.

In one embodiment, the method of assembling the apparatus of the multi-barrel injector head comprises the steps of:

step i, matching the transfer pad 5 with the neck post 4 along the concave hole 54 and the convex post 41, wherein the through hole four 53 and the through hole five 421 are coaxial;

step ii, fixing the needle cylinder 6, and embedding the matched neck post 4 and the adapting pad 5 into the cylindrical convex thin wall 64 at the top of the needle cylinder 6 to realize the sealing of the adapting pad 5 on the first through hole 611, the second through hole 621 and the third through hole 631 at the top of the needle cylinder 6;

step iii, the collar 3 is connected to the top of the syringe 6, so that the arc beam 31 of the collar 3 is locked and matched with the arc beam 641 of the syringe 6 to fix, and the arc beam 32 of the collar 3 clamps the top surface of the neck 4 to limit the axial movement of the neck 4, but the neck 4 can rotate circularly.

Step iv, connecting the top cover 2 with the neck post 4, wherein the axis of the circumferential thin-wall convex hole 21 of the top cover 2 is the same as that of the cylindrical barrel 42 of the neck collar, and the square convex part 43 of the neck post 4 is clamped into the square through hole 23 of the top cover 2 through the locking fit of the circumferential convex beam II 211 and the circumferential convex beam I422;

and v, realizing bolt matching of the needle 1 and the internal thread structure 423 of the neck column 4 through the external thread structure of the needle seat 11.

Referring to fig. 1, 9 and 10, the stirring rod 7 of the multi-tube injector is placed in the powder chamber through a powder sealing plug 8, and the axes of the stirring rod and the powder chamber are the same. The top of one end which extends into the powder cavity 61 is provided with a plurality of stirring teeth 71 which are symmetrically distributed along the axial center. The end of the stirring rod 7 extending out of the cavity is provided with a stirring handle 72, and five surfaces of the stirring rod include but are not limited to arc-shaped design, so that the operation of a user is convenient. Meanwhile, the powder sealing plug 8 is in interference fit with the first lumen 61 (powder lumen) of the needle cylinder 6, and the top of the powder sealing plug 8 comprises but is not limited to a structure 82 with an elastic material, so that the powder solid is sealed.

The central axial direction of the powder sealing plug 8 is a hole 81, the stirring rod 7 is inserted into the hole 81, the two are in clearance fit, and the stirring rod 7 can freely rotate and push and pull to uniformly stir a plurality of medicines in the cavity tube I61.

Referring to fig. 11, the liquid sealing plug 9 of the multi-tube injector is made of a material including, but not limited to, an elastic solid material, and the liquid sealing plug 9 is in interference fit with the second lumen 62 and the third lumen 63 of the syringe 6 respectively to achieve sealing against liquid. Meanwhile, one end of the liquid sealing plug 9 contacting the outside is provided with a step structure 91.

Referring to fig. 12, the pushing rod 10 of the multi-tube injector is a cylinder with an arc groove structure, the inner diameter of the arc groove is distributed in two sections, and the top section 101 is in interference fit with the step structure 91 of the liquid sealing plug 9, so that the pushing rod 10 can fix the liquid sealing plug 9 to push the liquid. Meanwhile, the inner diameter of the circular arc of the push rod 10 close to the outer section 102 can realize clearance fit with the outer diameter of the stirring rod 7. The pushing rod 10 is provided with a slope protrusion 1021 near the outer section 102 to realize the clamping and rear fixing of the stirring rod 7, and the outer end of the pushing rod 10 is provided with a pushing handle for applying force. In addition, the height of the push rod 10 is equal to the height of the stirring rod 7 after removing its height in the powder sealing plug 8.

The operation of the above design can be broken down into: after the pushing rod 10 pushes the liquid sealing plug 9 to inject the liquid from the second lumen 62 into the first lumen 61, the stirring rod 7 stirs the powder and the liquid, the stirring rod 7 is pulled out after the stirring is finished, and stops after the stirring teeth 71 and the elastic structure 82 on the top of the powder sealing plug 8, and the pushing rod 10 is clamped into the stirring rod 7 to provide an external supporting force for the stirring rod. The stirring handle 72 of the stirring rod 7 is pushed, mechanical force support is provided by the pushing rod 10, the powder sealing plug 8 is pushed out of the first lumen 61 of the needle cylinder 6, and the mixed medicine is pushed out along the fourth through hole 53, the fifth through hole 421 and the needle 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A multi-tube injector, comprising: the syringe comprises a needle head, a top cover, a neck ring, a neck post, a connecting pad, a syringe, a stirring rod, a powder sealing plug, a liquid sealing plug and a pushing rod, wherein the syringe comprises a plurality of tube cavities capable of containing a plurality of different medicines;

the syringe is characterized in that the syringe is provided with through holes on the top surface corresponding to each tube cavity, a plurality of the through holes can be matched with the grooves on the bottom surface of the transfer pad, and medicines enter other tube cavities from one tube cavity through the grooves to be mixed;

the adapter pad and the circumferential convex thin wall of the needle cylinder are coaxial, the bottom surface of the adapter pad is provided with a plurality of grooves and through holes, the positions of the grooves and the through holes on the adapter pad are adjusted by rotation, so that the grooves are communicated with different tube cavities of the needle cylinder, and the medicine is pushed out from one tube cavity of the needle cylinder, flows through the grooves on the adapter pad and enters the other tube cavity of the needle cylinder;

the transfer pad is made of an elastic sealing material, a plurality of concave holes are formed in the top surface of the transfer pad, and a plurality of protruding columns are arranged on the bottom surface of the neck column and matched with the concave holes in the top surface of the transfer pad; a cylindrical barrel is arranged on the top surface of the neck post, the axis of the cylindrical barrel is a through hole, the through hole of the cylindrical barrel penetrates through the neck post, and the through hole of the cylindrical barrel and the through hole of the transfer pad are coaxial; a first circumferential protruding beam along the radial direction is arranged on the outer side of the middle part of the cylindrical barrel, and an internal thread structure matched with the external thread structure of the needle base at the bottom of the needle head is arranged at the top of the cylindrical barrel; and the top surface of the neck post is provided with a convex part matched with the through hole on the top cover.

2. A multi-barrel syringe as claimed in claim 1, wherein the number of lumens of the barrel is 2 or more.

3. A multi-barrel injector as claimed in claim 1, wherein the top surface of the barrel has a thin wall with a circumferential projection, and the outside of the top of the thin wall has two arc-shaped beams with central symmetry projecting radially outwards; the neck ring and the circumferential convex thin wall of the needle cylinder are coaxial, and the inner side of the middle part of the neck ring is provided with two arc-shaped beams which radially protrude and are centrosymmetric; and the two arc-shaped beams of the circumferential protruding thin wall are mechanically matched with the two arc-shaped beams on the inner side of the middle part of the neck ring to fix the neck ring on the top surface of the needle cylinder.

4. A multi-tube injector as claimed in claim 3, wherein the inside of the top of said collar is provided with two radially projecting centrosymmetric arc-shaped beams, and said collar and adapter pad are embedded in the thin wall of said barrel and then can rotate axially; and the side surface of the outer part of the neck ring is provided with scale marks for marking the unnecessary passages.

5. A multi-barrel injector according to claim 1, wherein the top cover is of a shell structure, a plane eccentric part outside the top cover is provided with a circular thin-wall bulge hole outwards, the circular thin-wall bulge is coaxially sleeved and matched with the cylindrical barrel of the neck post, and a circular bulge beam II which is outwards along the radial direction is arranged on the inner side of the middle part of the circular thin-wall bulge of the top cover and is matched with the circular bulge beam I which is outwards along the radial direction on the outer side of the middle part of the cylindrical barrel; the inner plane of the top cover is provided with a protruding structure along the axial direction, the protruding structure is in contact with the top surface of the neck post, and protruding structures are arranged on two sides of the top cover.

6. A multi-barrel syringe as claimed in claim 1, wherein the needle is made of stainless steel, the needle is of the straight or curved type, and the tip of the needle is flat or bevelled.

7. A multi-tube injector according to claim 1, wherein the stirring rod is placed in the tube cavity through the powder sealing plug, the top of one end of the powder sealing plug extending into the tube cavity is provided with a plurality of stirring teeth symmetrically distributed along the axial center, and one end of the stirring rod extending out of the tube cavity is provided with a stirring handle; the central axial direction of the powder sealing plug is a hole, and the stirring rod is embedded into the hole for clearance fit; the powder sealing plug is in interference fit with the tube cavity of the needle cylinder; the top of the powder sealing plug is made of elastic material.

8. A multi-barrel injector as claimed in claim 7, wherein the liquid sealing plug is made of an elastic solid material and is in interference fit with the barrel lumen; one end of the liquid sealing plug is of a step structure; the pushing rod is of a cylindrical structure with an arc groove, the inner diameter of the arc groove is distributed in two sections, the top section of the pushing rod is in interference fit with the step structure of the liquid sealing plug, and the outer section of the pushing rod is in clearance fit with the outer diameter of the stirring rod; the push rod is provided with an inclined plane bulge near the outer section.