CN103143081B - Improved multi-cavity injection syringe - Google Patents

Abstract

The invention provides a multi-cavity injection syringe which is used for body injection, provided with independent drug tubes and mixes drugs in a puncture device, and belongs to the technical field of medical appliances. The improved multi-cavity injection syringe comprises a push rod fixed disc, an injection push rod, a pinch plate, an outer layer injection tube, the puncture device, the independent drug tubes, a needle head, a lower movable needle cover and an upper movable cover, wherein the internal space of the outer layer injection tube is divided into a plurality of cavities, an annular convex structure is respectively arranged outside the upper end and the lower end of the outer layer injection tube, the independent drug tubes can be respectively arranged in the cavities, the pinch plate can be clamped on the convex structure on the upper end in a rotating way, and the puncture device can be pushed and clamped into the convex structure on the lower end. Drugs to be mixed are respectively arranged in the independent drug tubes in a separating way, so that the filling feasibility is better, and the application time on a battlefield can be maximally reduced. The liquor sealing performance is good, the safety and hygiene can be guaranteed by adopting the closed-type needle head; and the push rod can be of a whole and also can be divided into an upper section and a lower section, so that simplicity in assembling and convenience in injection can be realized, each drug tube can be repeatedly used, and rapidness in injection can be realized while rapidness in mixing is realized.

Description

An improved multi-chamber syringe

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a multi-chamber injector which can be used for human injection, has an independent medicament cartridge and is mixed in a piercing device.

Background technique

In modern warfare, chemical weapons are most likely to be used. At present, poisoning by chemical weapons requires several mixed drugs for detoxification. At present, most of the injection products of antidotes are single drugs or two compound drugs. To complete the detoxification injection, only One can be injected and then the other is injected, which delays the first aid to the poisoned wounded in the case of war, and greatly increases the possibility that neurotoxic substances will cause the poisoned wounded to die quickly within 1-2 minutes. Therefore, when a chemical weapons war takes place, soldiers need an injection that can complete self-rescue and mutual rescue within 1-2 minutes. At present, due to the poor stability of the compound injection, 2-4 syringes are required to be injected sequentially during the treatment injection, which not only causes the injection pain of the poisoned wounded, but more importantly, delays the treatment time, especially in high-intensity combat systems, first aid The sequential injection of drugs cannot meet the needs of treatment. In order to compete with death for life, shorten the treatment time as much as possible, and solve the problem of stability of drug compatibility, NATO, the Netherlands, the United States and other countries have successively developed multi-chamber syringes to mix atropine , bisphosphonate, diazepam and other treatment agents, and the UK, Belgium, Luxembourg and other countries have developed injections filled with powder injections, but these multi-chamber syringes have too few chambers, the structure of the syringe is complicated, and the use process is complicated. Cannot be used on the special occasion of war.

Existing patents 200920000074.X and 200820136184.4 introduce two kinds of multi-chamber syringes.

The patent with the application number 200920000074.X relates to a mixable, multi-chamber syringe for human injection, including a needle tube, an injection rod, and a needle. The upper end of the medicament chamber is movably connected by the piston seal, and the lower end is fixed and sealed by the bottom seal. The injection rod is installed on the upper part of the syringe, and the front end is in contact with the upper surface of the piston. The lower end of the syringe has a drug outlet, and the drug outlet is equipped with a breaking device , The breaking device is composed of inner and outer cylinders, the outer cylinder is connected with the syringe in a sealed manner, the inner cylinder is hollow and screwed together with the outer cylinder through the external thread, the upper end of the inner cylinder has a serrated upper edge, and the needle is set on the outer cylinder Above all, this scheme uses a soft partition to separate several medicines that need to be mixed. When using it, the bottom of the medicine cylinder is cut through the seal breaking device, and then the injection rod is pushed to inject. It is simple and convenient, and achieves rapid mixing and injection at the same time. Purpose: In order to prevent the accidental pressing of the injection rod, the injection rod and the top cover are snapped together. The groove in the middle of the piston can position the injection rod, so that the force on the piston is uniform and the medicine is not leaked. Antidote use time.

The patent with application number 200820136184.4 relates to a medical device, specifically to a mixable, multi-chamber syringe for human injection, in which a movable medicament cartridge can be installed, and the medicament cartridge has a top cover from top to bottom, The bottom plate and the three partitions in the middle are separated and sealed with four chambers with medicine. There is a shaft inside the medicine cartridge, and the three middle partitions are fixedly connected with the shaft. There is a prismatic shaft cap on the top of the shaft. , a pull ring is installed on the shaft cap, the middle of the injection rod is a hollow pipe, and a pull shaft spring is installed inside the hollow pipe, one end of the pull shaft spring is connected to the top cover of the hollow pipe, and the other end is connected to the pull ring at the top of the shaft cap, and the injection barrel There is a through-hole with internal thread at the lower end, and a through-tube with external thread is installed in the through-hole. The needle is installed on the through-tube, and the end of the through-tube in the injection barrel is sharp. The chamber can mix a variety of compound medicines, reduce the volume of the syringe, and is easy to carry. It adopts a closed needle to ensure safety and sanitation. The use of a medicine cartridge that can be replaced at any time allows one syringe to complete multiple injections. Install different mixed drug cartridges for different situations to minimize the use time on the battlefield.

The common point of the above two patents is that the liquid medicine needs to be pre-mixed and filled into the syringe while preparing the device. However, there are few pre-mixed devices at home and abroad. Manufacturers cannot satisfy the production of equipment, so it is difficult to realize the overall premixed filling.

Contents of the invention

The purpose of the present invention is to provide an improved multi-chamber syringe structure, which is improved to an independent drug cartridge syringe for better application. The independent drug cartridge is used to pack several kinds of drugs that need to be mixed. The filling can be realized better, and the maximum Minimize the use time on the battlefield. The solution of this solution is well sealed, and the closed needle is used to ensure safety and sanitation. The push rod can be a whole, which can be divided into upper and lower sections. It is simple to assemble and easy to inject. purpose of injection.

For realizing above-mentioned purpose of the invention, the technical scheme that the present invention takes is:

An improved multi-chamber syringe, the syringe is provided with an upper movable cover with the cover opening downwards, an outer injection barrel and a lower movable needle cover with the cover opening upwards in sequence along the axis of the syringe; the syringe includes: The push rod fixed plate at the closed end of the movable cover and parallel to it, the injection push rod perpendicular to the fixed plate, the pinch plate located at the open end of the upper movable cover parallel to the fixed plate, and the upper and lower surfaces are respectively parallel to the pinch plate The outer layer injection cylinder, the top of the outer layer injection cylinder is connected with the pinch plate, the puncture device coaxial with the outer layer injection cylinder, the puncture device is connected with the bottom of the outer layer injection cylinder end connection, installed on the bottom end of the piercing device and the coaxial needle of the piercing device, the upper opening end of the cover opening is connected with the cylindrical lower movable needle cover of the piercing device, and the closed end of the lower movable needle cover is The plane is parallel to the surface of the closed end of the upper movable cover; its improvement is:

The syringe includes an axially parallel independent medicament cartridge inside the outer medicament cartridge;

The outer injection barrel includes a cavity arranged parallel to its axial direction and annular projections located at both ends of the outer injection barrel and perpendicular to the axial direction, the annular projections are in the shape of a ring, and the annular projections are Disc shape, the upper surface of the cavity is flush with the upper surface of the annular protrusion, the lower surface of the cavity is fixed on the disc surface of the annular protrusion, and the lower surface of the cavity is provided with the The cavity is a concentric opening, the outer edge of the annular protrusion is provided with a groove axially penetrating through the annular protrusion and an upper surface flush with the upper surface of the annular protrusion and located inside the groove Stopper; the outer edge of the annular protrusion is provided with a groove axially penetrating the protrusion and a stopper whose lower surface is flush with the lower surface of the annular protrusion and is located inside the groove;

The push rod fixing plate and the injection push rod are integrated, the lower end of the injection push rod can be pushed into the cavity, and the independent drug cartridge can be put into the cavity;

The piercing device is arranged in sequence along the axial direction of the piercing device with a block extending radially to the inner side of the shaft, a hollow needle head and a hollow needle seat connected to each other are arranged horizontally with the block, and a hollow needle seat is arranged radially to the outside of the shaft The protrusion, the cylindrical drug outlet located under the protrusion;

The needle is connected with the piercing device through the drug outlet.

Another preferred technical solution of the present invention is: the two ends of the cavity are connected to each other, and the thickness of the stopper along the axial direction of the outer injection cylinder is 1/2 of the thickness of the annular protrusion. The circumferential width of the stopper along the annular protrusion is equal to the width of the groove along the circumferential direction of the annular protrusion. The thickness of the stopper along the axial direction of the outer layer of the injection cylinder is the thickness of the annular protrusion The circumferential width of the stopper along the annular protrusion is equal to the width of the groove along the circumferential direction of the annular protrusion. The diameter of the opening is smaller than the diameter of the cavity, the opening passes through the annular protrusion in the axial direction, and the opening is arranged in cooperation with the hollow needle.

Another preferred technical solution of the present invention is: the gusset plate is a cylinder structure without an upper cover, the position of the gusset plate cylinder cover is provided with a circular through hole coaxial with the gusset plate, and the position of the cylinder wall of the gusset plate is There is a groove axially penetrating through the pinch plate, and a pinch plate bump is arranged on the inner side of the cylinder wall adjacent to the groove, the upper surface of the pinch plate bump is flush with the upper surface of the tube wall, and the pinch plate The thickness of the plate protrusion along the axial direction of the pinch plate is the height of the cylinder wall The diameter of the circular through hole is greater than or equal to the diameter of the push rod fixing plate, and the pinch plate and the annular protrusion can be fastened with the stopper through the pinch plate protrusion.

Another preferred technical solution of the present invention is: the injection push rod is a hollow structure or a solid structure, and the shape of the cross section of the injection push rod is an equilateral triangle or a right triangle.

Another preferred technical solution of the present invention is: the outer injection cylinder and the piercing device are fastened by the ring-shaped protrusion and the locking block.

Another preferred technical solution of the present invention is: the independent medicament cartridge includes a barrel body, a barrel mouth at both ends of the barrel body, and a barrel bottom, the barrel body is a hollow cylinder, the barrel mouth is sealed by a rubber cover, and the barrel bottom Sealed by a rubber plug; the diameter of the mouth of the cylinder is smaller than the diameter of the bottom of the cylinder.

Another preferred technical solution of the present invention is: the lower end of the injection push rod is provided with a protrusion extending radially to the outside of the shaft along the radial direction of the injection push rod, and the diameter of the protrusion is smaller than or equal to the diameter of the rubber stopper.

Another preferred technical solution of the present invention is: the diameter of the barrel opening is larger than the diameter of the opening, the barrel opening is located at the bottom of the cavity, and the bottom of the barrel is located at the top of the cavity.

Another preferred technical solution of the present invention is: the opening end of the lower movable needle cover is provided with a lower movable needle cover anti-slip block extending radially to the inner side of the axis of the lower movable needle cover, and the telescopic direction is parallel to the lower movable needle cover. The axial pressure spring and the needle exit hole located at the axis of the closed end of the lower movable needle cover, the anti-slip block of the lower movable needle cover and the protrusion clamping can realize the connection between the lower movable needle cover and the puncturing device .

Another preferred technical solution of the present invention is: the opening end of the upper movable cover is provided with an upper movable cover anti-slip block extending radially toward the inner side of the axis of the upper movable needle cover, and the upper movable cover anti-slip block can realize buckle plate and Connection to the upper movable cover.

Owing to adopting above-mentioned technical scheme, compared with prior art, the beneficial effect of the present invention comprises:

1) The sealing and stability of the agent are good

The liquid medicine is filled in an independent drug cartridge, which is made of hard plastic and is in the shape of a hollow cylinder. It is sealed by a rubber cover and covered with an aluminum cover to ensure the sealing and stability of the liquid medicine.

2) It is convenient to premix the medicine

The solution of the present invention adopts the form of an independent drug cartridge, pre-mixes the drug into the independent drug cartridge, seals it with an aluminum cover or other material, and then assembles it into the outer injection barrel, pushes the puncturing device upwards to snap into the outer layer of the injection barrel, so that the needle of the puncturing device Puncture the rubber cover of the independent medicament cylinder, and the liquid in the independent medicament cylinder flows into the piercing device through the needle and mixes at the through hole of the medicine, which achieves the purpose of rapid mixing and rapid injection. The independent packaging of the medicament solves the bottleneck of difficult premixing. The use of sealed needles ensures safety and sanitation, and this solution can maximize the first-aid time on the battlefield.

3) Simple assembly and convenient injection

The push rod can be a whole and can be divided into upper and lower sections, which is easy to assemble, convenient to inject, and the drug cartridge can be used repeatedly, achieving the purpose of quick injection while mixing quickly.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 Schematic diagram of multi-cavity syringe structure;

Fig. 2 Schematic diagram of the structure of the outer injection cylinder;

Fig. 3 Schematic diagram of pinch plate structure;

Fig. 4 schematic diagram of piercing device structure;

Fig. 5 Schematic diagram of the structure of the independent drug cartridge;

The schematic diagram of the state structure of the syringe when the medicine is stored in Fig. 6;

Reference signs:

1-push rod fixing plate, 2-injection push rod, 2-1-push rod bump, 3-gusset, 3-1-circular through hole, 3-2-groove, 3-3-gusset convex block, 4-outer injection cylinder, 4-1-cavity, 4-2-annular protrusion, 4-3-groove, 4-4-block, 4-5-annular protrusion, 4-6- Groove, 4-7-hole, 4-8-block, 5-piercing device, 5-1-drug outlet, 5-2-needle seat, 5-3-block, 5-4-needle , 5-5-piercing device bump, 6-independent drug cartridge, 6-1-barrel body, 6-2-barrel mouth, 6-3-barrel bottom, 6-4-independent drug cartridge bottom rubber plug, 6- 5-Rubber cover for the mouth of the independent drug cylinder, 7-needle head, 8-lower movable needle cover, 8-1-anti-slip block for lower movable needle cover, 8-2-pressure spring, 8-3-pinhole, 9-upper movable cover , 9-1-Anti-slip block on the upper movable cover.

Detailed ways

Below in conjunction with example the present invention is described in detail.

The invention provides an injector which is easier to implement and can simultaneously inject multiple medicines into the human body, which can be independently packaged, mixed at the needle, and has multiple independent medicine cartridges. The liquid medicine is filled in an independent drug cartridge, which is made of hard plastic and is in the shape of a hollow cylinder. It is sealed by a rubber cover and covered with an aluminum cover to ensure the sealing and stability of the liquid medicine.

The multi-chamber syringe of the present invention comprises a push rod fixed disc 1, an injection push rod 2, a buckle plate 3, an outer injection cylinder 4, a piercing device 5, an independent drug cylinder 6, a needle head 7, a lower movable needle cover 8 and an upper movable needle cover. Cover 9.

The outer injection barrel 4 is divided into a plurality of cavities 4-1, with an annular protrusion 2 on the outside of the upper end and an annular protrusion 4-5 on the outside of the lower end. The independent medicament cartridge 6 can be put into the cavity 4-1, the buckle plate 3 can be rotated and locked on the annular raised structure 4-2, the piercing device 5 can be pushed into the annular raised structure 4-5, the push rod 2 and the The push rod fixing disc 1 is a whole, and the lower end of the push rod 2 can be put into the cavity 4-1. Both ends of the plurality of cavities 4-1 are connected, and the diameter of the opening 4-7 at the lower end of the cavities 4-1 is smaller than that of the cavities 4-1.

There are multiple grooves 4-3 on the annular raised structure 4-2 at the upper end, and there are raised stoppers 4-4 inside the grooves 4-3.

A plurality of grooves 4-6 are arranged on the lower annular protruding structure 4-5, and a stopper 4-8 is arranged at the inner lower end of the grooves 4-6.

The pinch plate 3 has a circular through hole 3-1, and the diameter of the circular through hole 3-1 is greater than or equal to the diameter of the push rod fixing plate 1. There are multiple grooves 3-2 on the edge of the pinch plate 3, and the groove 3-2 There is a bump 3-3 on one side of the inside, and the bump 3-3 can make the buckle plate 3 rotate and fasten with the annular raised structure 42.

The diameter of the push rod fixed disk 1 is smaller than that of the outer injection cylinder 4, and the push rod fixed disk 1 and the push rod 2 are integrated.

There is a protrusion 2-1 at the lower end of the push rod 2, and the diameter of the protrusion 2-1 is smaller than or equal to the bottom rubber plug 6-4 of the independent drug cartridge.

The puncturing device 5 includes a drug outlet 5-1, a needle seat 5-2, a block 5-3, a needle 5-4, and a puncturing device bump 5-5, and the drug outlet 5-1 can be caught by the needle 7 , the needle head 5-4 is bonded on the needle base 5-2, the clamping block 5-3 can be pushed into the groove 4-6, and the piercing device protrusion 5-5 can clamp the lower movable needle cover 8.

The independent medicine cartridge 6 is composed of a barrel body 6-1, a barrel mouth 6-2, a barrel bottom 6-3, an independent medicine cartridge bottom rubber plug 6-4, and an independent medicine barrel mouth rubber cover 6-5, and the barrel body 6-1 is a hollow cylinder Shape, the diameter of the cylinder mouth 6-2 is smaller than the diameter of the cylinder bottom 6-3, the cylinder mouth 6-2 is sealed by the independent drug cylinder mouth rubber cover 6-5, and is covered with an aluminum cover, and the cylinder bottom 6-3 is covered by the independent pharmaceutical cylinder bottom rubber plug 6 -4 Sealed.

The front end of the lower movable needle cover 8 has a lower movable needle cover anti-slip block 8-1 that can prevent the movable cover 8 from falling off, and a pressure spring 8-2 is installed in the lower movable needle cover 8, and the front end of the movable cover 8 has a pinhole 8 -3.

The front end of last movable cover 9 has the upper movable cover anti-slip block 9-1 that can prevent movable cover 9 from coming off.

The body of the outer injection cylinder of the present invention is divided into a plurality of cavities 4-1 by hard materials, and the lower end can be snapped into a hollow piercing device 5, and the piercing device 5 has a hollow needle 5-4 and a drug outlet 5-1. , the needle 7 can be installed on the drug outlet 5-1.

Syringe of the present invention can have following several technical schemes:

There is no annular protrusion at the bottom end of the injection push rod 2 .

The injection push rod 2 can be hollow, solid, or in any form such as a frame.

The push rod fixed plate 1 and the push rod 2 can be two independent parts. The push rod fixed plate 1 can be divided into two parts: the chassis and the clamping plate. There are protrusions on the chassis, and the clamping plate corresponds to the raised position of the chassis. There is a depression, and there is a protruding platform above the push rod 2. The protruding platform can be snapped into the depression of the clamping disc.

The push rod 2 can be divided into upper and lower sections, the lower section is a hollow structure, its shape can be an equilateral triangle, a rectangular column but one side is missing, and it is fixed by the pinch plate 3 so that it does not come out; the upper section is connected with the push rod fixing plate 1 as a whole, The push rod 2 is T-shaped and can be put into the lower hollow column. The "-" structure of its "T" shape can be spliced with the lower push rod to form a complete equilateral triangle and rectangular column, and it is slightly wider than the triangular and rectangular columns. When the edge is missing, when the medicine is stored, the injection push rod 2 is shrunk in the outer drug cartridge, and is fixed on the pinch plate 3 by the protrusion on the push rod fixing plate 1 . When preparing for injection, the upper sections of the four push rods can be pushed to one side at the same time and lifted upwards. After encountering the upper pinch plate 3 of the outer injection barrel, translate and pull the upper push rod 2 to the opposite side to make the "T" shape frame of the upper push rod Push against the hollow column of the lower push rod, and push the push rod down to achieve injection. This optimization scheme can reduce the volume of the syringe and better seal the push rod 2 .

This solution uses independent drug cartridges to pack several kinds of drugs that need to be mixed. The filling is more achievable, the drug liquid is well sealed, and the closed needle is used to ensure safety and sanitation. The push rod 2 can be a whole, which can be divided into upper and lower parts. Two stages, easy to assemble, easy to inject, and the drug cartridge can be reused, achieving the purpose of rapid mixing and rapid injection at the same time. This solution can minimize the use time on the battlefield.

The operation process of the multi-chamber syringe is as follows:

Pharmaceutical packaging:

As shown in Figure 1, the overall structure of the syringe, Figure 2, the structure of the outer injection cylinder, and Figure 5, the structure of the independent drug cartridge, the independent drug cartridge 6 is made of organic medical hard materials, such as organic materials, glass, etc., and the bottom of the cylinder 6- 3. It is sealed by the rubber plug 6-4 at the bottom of the independent drug cartridge. When the medicinal liquid is filled into the independent drug cartridge 6, the mouth of the cartridge 6-2 is sealed by the rubber cap 6-5 at the mouth of the independent drug cartridge. Forms a well-sealed dose.

Storage of medicines:

Put the filled independent medicine cartridge into the cavity 4-1 from the upper end of the outer injection cylinder 4, align the lower end of the push rod 2 with the rubber plug 6-4 at the bottom of the independent medicine cartridge and put it into the cavity 4-1.

As shown in Figure 3, the circular through hole 3-1 on the buckle plate 3 avoids the push rod fixing plate 1, and the protrusion 3-3 avoids the ring-shaped raised structure 4- on the outer injection cylinder 4 while buckling from the top 2. Snap into the groove 4-3, and fasten the pinch plate 3 on the upper annular protrusion structure 4-2 by rotating the pinch plate 3. At this time, because the diameter of the circular through hole 3-1 on the pinch plate 3 is relatively outer The layer injection cylinder 4 is small, so that the independent medicament cylinder 6 and the push rod 2 can not slide out in the cavity 4-1.

As shown in Figure 1, align the upper movable cover anti-slip block 9-1 on the upper movable cover 9 with the groove 3-2 on the pinch plate 3, push through the upper movable cover 9 and pass the groove 3-2, and then rotate the upper movable cover Movable cover 9, so that the anti-slip block 9-1 of the upper movable cover blocks the annular protruding structure 4-2 at the upper end of the outer injection barrel 4, and fixes the push rod 2 and the push rod fixing plate 1 while closing, preventing the push rod 2 from being in the drug storage. damaged in the process.

As shown in Figures 2, 4, and 5, make the block 5-3 on the piercing device 5 avoid the stopper 4-8 at the lower end of the groove 4-6, and properly push the piercing device 5 so that the block 5-3 Clamp into the groove 46 for a certain distance, rotate the piercing device 5 so that the block 5-3 is stuck on the block 4-8, at this time the needle 5-4 does not pierce the rubber cover 6-5, connect the needle 7 to the piercing device The drug outlet through hole 5-1 on the 5 is assembled with the lower movable needle cover 8, so that the protrusion 8-1 on the lower movable needle cover 8 is stuck on the protrusion 5-5.

Premixing and injection of medicines:

As shown in Figures 1 and 6, push the piercing device 5 upwards during use, so that the block 5-3 passes through the groove 4-6 completely, and is stuck on the annular raised structure 4-5, so that the needle 54 pierces the mouth of the independent drug cartridge The rubber cover 6-5 pushes the upper movable cover 9 downwards at this time, and the medicinal liquid in each independent medicinal cartridge 6 flows into the piercing device 5 through the hollow needle 5-4, and mixes at the through hole 5-1 of the medicinal outlet. When the upper movable cover 9 is pushed downwards, the movable needle cover 8 at the lower end of the syringe slides from bottom to top, and the injection needle 7 comes out from the needle outlet hole 8-3 at the front end of the movable cover 8 and penetrates into the skin, thus completing the entire injection process.

The invention has been described herein in terms of specific exemplary embodiments. Appropriate substitutions or modifications will be apparent to those skilled in the art without departing from the scope of the present invention. The exemplary embodiments are illustrative only, and not limiting of the scope of the invention, which is defined by the appended claims.

Claims (8)

1. the multi-cavity injection syringe improved, described syringe axially sets gradually the downward upper removable cover (9) of lid mouth, outer injection tube (4) He Gaikou lower active pointer lid (8) upwards along syringe, described syringe comprises: be positioned at described upper removable cover (9) blind end and push rod fixed disk (1) in parallel, the injection putter (2) vertical with described fixed disk (1), be positioned at the buckle (3) that described upper removable cover (9) opening is parallel with described fixed disk (1), the described outer injection tube (4) of the parallel described buckle (3) of upper and lower surface difference, the top of described outer injection tube (4) is connected with described buckle (3), with the lancing device (5) of described outer injection tube (4) coaxial line, described lancing device (5) is connected with the bottom of described outer injection tube (4), be installed on the syringe needle (7) of described lancing device (5) bottom and lancing device (5) coaxial line, the columniform described lower active pointer lid (8) that lid mouth upward opening end is connected with described lancing device (5), described lower active pointer lid (8) blind end plane is parallel to described upper removable cover (9) blind end surface, it is characterized in that:

Described syringe comprise be positioned at described outer injection tube (4) inner and with described outer injection tube (4) axially parallel independent medicament cartridge (6);

Described outer injection tube (4) comprises the cavity volume (4-1) that be arranged axial with it and is positioned at described outer injection tube (4) two ends and axially vertical annular protrusion (4-2,4-5), described annular protrusion comprises the first annular protrusion (4-2) and the second annular protrusion (4-5), described first annular protrusion (4-2) is toroidal, described second annular protrusion (4-5) is disc-shape, the upper surface of described cavity volume (4-1) is concordant with described first annular protrusion (4-2) upper surface, the lower surface of described cavity volume (4-1) is fixed on the card of described second annular protrusion (4-5), described cavity volume (4-1) lower surface is provided with the perforate (4-7) with described cavity volume (4-1) concentric, the outer rim of described first annular protrusion (4-2) is provided with the first groove (4-3) first block (4-4) of being positioned at described first groove (4-3) inside concordant with described first annular protrusion (4-2) upper surface with upper surface of axially through described first annular protrusion (4-2), the outer rim of described second annular protrusion (4-5) is provided with the second groove (4-6) second block (4-8) of being positioned at described second groove (4-6) inside concordant with the lower surface of described second annular protrusion (4-5) with lower surface of axially through described second annular protrusion (4-5),

Described push rod fixed disk (1) and injection putter (2) are an entirety, injection putter (2) lower end can push described cavity volume (41), and described independent medicament cartridge (6) can put into described cavity volume (41);

Described lancing device (5) along lancing device (5) axially set gradually radially extend inside axle fixture block (5-3), to be horizontally disposed with interconnective hollow pinhead (5-4) and hollow needle stand (5-2), the projection (5-5) radially extended outside axle with described fixture block (5-3), to be positioned at the cylindrical medicine outlet (5-1) of projection (5-5) below;

Described syringe needle (7) is connected with described lancing device (5) by medicine outlet (5-1);

Described cavity volume (4-1) two ends are mutually through, and described first block (4-4) is the first annular protrusion (4-2) thickness along thickness that outer injection tube (4) is axial described first block (4-4) is the first groove (4-3) along the first annular protrusion (4-2) circumferential width along the first annular protrusion (4-2) circumferential width described second block (4-8) is the second annular protrusion (4-5) thickness along thickness that outer injection tube (4) is axial described second block (4-8) is the second groove (4-6) along the second annular protrusion (4-5) circumferential width along the second annular protrusion (4-5) circumferential width the diameter of described perforate (4-7) is less than the diameter of described cavity volume (4-1), described perforate (4-7) runs through described second annular protrusion (4-5) vertically, and described perforate (4-7) and described hollow pinhead (5-4) are equipped with;

Described buckle (3) is the tube structure without upper cover, buckle (3) cover position is provided with the manhole (3-1) with described buckle (3) concentric, the barrel position of buckle (3) is provided with the 3rd groove (3-2) axially running through buckle (3), inside barrel, buckle projection (3-3) is set with described 3rd groove (3-2) adjacent, the upper surface of described buckle projection (3-3) is concordant with barrel upper surface, and described buckle projection (3-3) is barrel height along thickness that buckle (3) is axial the diameter of described manhole (3-1) is more than or equal to the diameter of described push rod fixed disk (1), and described buckle (3) and described first annular protrusion (4-2) link closely by described buckle projection (3-3) and the first block (4-4).

2. the multi-cavity injection syringe of a kind of improvement as claimed in claim 1, it is characterized in that described injection putter (2) is for hollow structure or solid construction, the shape of injection putter (2) cross section is equilateral triangle or right angled triangle.

3. the multi-cavity injection syringe of a kind of improvement as claimed in claim 1, is characterized in that described outer injection tube (4) and lancing device (5) are linked closely by the second annular protrusion (4-5) and fixture block (5-3).

4. the multi-cavity injection syringe of a kind of improvement as claimed in claim 1, it is characterized in that described independent medicament cartridge (6) comprises at the bottom of stack shell (6-1), the nozzle (6-2) at described stack shell (6-1) two ends and cylinder (6-3), described stack shell (6-1) is hollow circuit cylinder, described nozzle (6-2) is sealed by Jiao Gai (6-5), and (6-3) at the bottom of described cylinder is sealed by plug (6-4); (6-3) diameter at the bottom of described nozzle (6-2) diameter is less than tin.

5. the multi-cavity injection syringe of a kind of improvement as claimed in claim 4, it is characterized in that described injection putter (2) lower end is provided with the second projection (2-1) extended outside axle along injection putter (2) radial direction, described second projection (2-1) diameter is less than or equal to the diameter of plug (6-4).

6. the multi-cavity injection syringe of a kind of improvement as claimed in claim 4, it is characterized in that described nozzle (6-2) diameter is greater than described perforate (4-7) diameter, nozzle (6-2) is positioned at the bottom of described cavity volume (4-1), and at the bottom of cylinder, (6-3) is positioned at the top of described cavity volume (4-1).

7. the multi-cavity injection syringe of a kind of improvement as claimed in claim 1, it is characterized in that described lower active pointer lid (8) opening is provided with the lower active pointer lid non-slipping block (8-1) extended inside its axle along lower active pointer lid (8) radial direction, telescopic direction is parallel to the axial compression spring (8-2) of described lower active pointer lid (8) and is positioned at the needle outlet (8-3) at described lower active pointer lid (8) blind end axle center place, described lower active pointer lid non-slipping block (8-1) and protruding (5-5) clamping can realize the connection of lower active pointer lid (8) and described lancing device (5).

8. the multi-cavity injection syringe of a kind of improvement as claimed in claim 1, it is characterized in that described upper removable cover (9) opening is provided with the upper removable cover non-slipping block (9-1) extended inside its axle along upper removable cover (9) radial direction, described upper removable cover non-slipping block (9-1) can realize the connection of buckle (3) and upper removable cover (9).