CN101057988B - Vehicle-fronted sterile mixing cartridge syringe - Google Patents

Abstract

A solvent front-mounted sterile medicine mixing cassette bottle injector comprises a solvent bottle (3) and a solute bottle (8), wherein a bottleneck of the solute bottle is sleeved with a sliding frame (7) fixed with a needle (5), the solvent bottle is arranged in a sliding sleeve (2), the sliding sleeve is in sleeved fit with a shell (9), and the bottleneck of the solvent bottle is opposite to the bottleneck of the solute bottle. A sliding frame (4) and a needle sleeve (6) are tightly matched with the bottle mouth of the solvent bottle, and the needle sleeve is contacted with the end face of the sliding frame. The solvent bottle is a penicillin bottle with pre-charged pressure, and the solute bottle is a cassette bottle. The invention realizes the conduction and mixing of two bottles of medicine through one needle, and the design of the first-stage push rod and the second-stage push rod (14 and 13) has great innovation on structure, thereby further increasing the rationality on structure and use, reducing the complexity of the production process and the production cost and facilitating the injection operation.

Description

Vehicle-fronted sterile mixing cartridge syringe

technical field

The invention belongs to the technical field of medical injectors, and in particular relates to a solvent front type aseptic mixed drug cartridge syringe.

Background technique

The applicant has applied for a number of pre-filled syringes successively, and has greatly improved and innovated the structure of the traditional syringe. Medical liability accidents caused by errors, and has the advantages of convenient use and self-injection. However, most of these syringes are in contact with the solvent bottle and the push handle, and the solute bottle (must be a cartridge) is located at the front of the syringe. When the solvent enters the solute bottle through the guide needle due to pressure, the drug is mixed, and then the drug is pushed out from the solute bottle. liquid. Although the structure has been greatly improved and certain positive effects have been produced, there are still some parts such as inconvenient use and unreasonable structure. For example, the conduction needle and the injection needle must be provided at the same time, so that the manufacturing cost cannot be reduced to the minimum, and the production process is also relatively complicated.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, to propose a design with greater innovation in structure, and to have more convenient use, lower production cost, and simpler production process. Vehicle-loaded sterile mixed-drug cartridge syringe.

The object of the present invention is achieved through the following solutions: the solvent bottle is placed in the sliding sleeve, the sliding sleeve and the shell are socketed and matched, and the bottleneck of the solvent bottle is opposite to the bottleneck of the solute bottle.

A further technical solution of the present invention is: a sliding frame and a needle sleeve slidingly fitted with the sliding frame are tightly fitted on the mouth of the solvent bottle, and the needle sleeve is in contact with the end surface of the sliding frame. The solvent bottle is a pre-filled vial, and the solute bottle is a cartridge. A claw or a limit hole is provided on the sliding frame, and a limit hole or a claw is correspondingly provided on the needle sleeve which is slidably matched with the slide frame. The end of the movable sleeve is screwed or fastened with an end cap.

It can be clearly seen from the aforementioned technical solutions that because the present invention sets the pressurized solvent bottle and the solute bottle correspondingly, only one of them can make the solvent bottle and the solute bottle conduct and mix medicine, and can be used as an injection needle needles, and also reduces a sliding frame that is stuck at the mouth of the solvent bottle. The structure is greatly simplified, which further increases the rationality of the structure, and also makes the manufacturing process simpler and the cost is greatly reduced compared with the original structure. More importantly, it can make the injection operation easier. In addition, the structural design of the primary and secondary push rods can greatly shorten the total length of the entire device and reduce the volume, which is also conducive to packaging, and can meet the maximum stroke of the piston to ensure smooth operation during injection.

Description of drawings

Fig. 1: Schematic diagram of the overall structure of the present invention (original state).

Figure 2: Schematic diagram of the needle cover.

Figure 3: Schematic diagram of the sliding frame.

Figure 4: Structural diagram of the cooperation between the needle cover and the sliding frame.

Figure 5: Schematic diagram of the matching structure at the push handle.

Figure 6: Structural state diagram when the two-stage push rod is pushed out.

Figure 7: Structural state diagram of the needle penetrating the solute bottle.

Figure 8: Structural state diagram when the solvent bottle and the solute bottle are connected.

Figure 9: Structural state diagram when injection is performed.

Fig. 10: A structural diagram of another embodiment of the present invention.

Fig. 11: A structural diagram of another embodiment of the present invention.

Detailed ways

As shown in Fig. 1, the present invention has a housing 9 and a sliding sleeve 2 slidingly fitted therewith, and a cartridge solute bottle 8 for water injection or powder injection is installed in the housing 9, and a rubber piston is arranged in the tail end of the solute bottle 8 10. In addition to being provided with a rubber plug, the bottle mouth is also slidably fitted with a sliding frame 7, and the inner wall of the sliding frame 7 also has claws 20, (see Figure 7) can play a conductive And the needle 5 of injection function is fixed on this sliding frame 7; And there is a solvent bottle 3 that liquid solvent is housed in the sliding sleeve 2, and this solvent bottle 3 is a vial filled with compressed gas in advance, and it is made of and The end cap 1 to which the sliding sleeve 2 is screwed or clamped is encapsulated in the sliding sleeve 2 . The mouth of the solvent bottle 3 is tightly fitted with a slide frame 4 (see Figure 2), and this slide frame 4 is socketed with a tubular needle cover 6 (see Figure 3). The claw 17 on the needle cover 4 and the clamping position 18 on the needle cover 4 realize clamping and positioning (refer to FIG. 4 ). Certainly, the said claw 17 can also be arranged on the needle cover 4, and the locking position 18 can also be arranged on the sliding frame 4, and its purpose is exactly to realize mutual positioning.

A fastening sleeve 12 is connected to the rear end of the syringe housing 9 , and a positioning ring 16 is arranged inside the fastening sleeve 12 , and the positioning ring 16 realizes positioning of the ram 11 plugged with the piston 10 . The secondary push rod 13 is fastened together with the push handle 15 , and a claw 19 is also provided at the bottom of the secondary push rod 13 . The primary push rod 14 is sleeved on the outside of the secondary push rod 13, and its lower end is stuck in the fastening sleeve 12 (see Fig. 5).

Referring to Fig. 1, syringe of the present invention has been prefilled with liquid solvent (i.e. water for injection, etc.) A certain pressure; and the powder injection or the water injection is prefilled in the solute bottle 8 according to the dosage. The sliding frame 4 and the needle cover 6 are in the initial position, the needle 5 is in the middle position and does not make the solvent bottle 3 and the solute bottle 8 conduct, the primary and secondary push rods 14, 13 are nested with each other, and the secondary push rod 13 is at the lowest position , At this time, the jaw 19 does not work.

When injection is required, hold the sliding sleeve 2 and push it toward the housing 9. The sliding sleeve 2 slides along the outer wall of the housing 9 until it stops at the limit position. During this process, the solvent bottle 2 pushes the sliding frame 4 and the needle sleeve 6, and passes the The cover 6 pushes the sliding frame 7, so that the needle 5 which is integrated with the sliding frame 7 first pierces the rubber stopper of the solute bottle 8. Now the inner port of the sliding frame 7 is against the solute bottle 8, and the claws 20 in the sliding frame 7 are hooked to the bottom edge of the bottle mouth for positioning. Continue to push the sliding sleeve 2 again, at this moment, the catch 18 on the sliding frame 4 breaks away from the claw 17 of the needle cover 6 and makes the end face of the sliding frame 4 lean against the bottom end of the needle cover 6, and the other end of the needle head 5 promptly pierces Rubber stopper for solvent bottle 3 (see Figure 8). Since the solvent bottle 3 is pre-filled with pressure, the liquid solvent enters the solute bottle 8 through the hollow needle 5 under the pressure to realize the conduction between the two bottles, and dissolves and mixes the solute of the powder injection or directly mixes it with the water injection.

After the medicine mixing is completed, the sliding sleeve 2 can be pulled out, and the sliding frame 4 and the needle sleeve 6 are driven to be separated from the shell 9 at the same time. At this time, the needle head 5 is completely exposed, leaving only a part of the structure as shown in FIG. 9 . At this time, pull the push handle 15 and the secondary push rod 13 closely matched with it, so that the claws 19 on the secondary push rod 13 are stuck on the outer end surface of the primary push rod 14, and then push the push handle 15 to pass through the secondary push rod 14. The push rod 13, the primary push rod 14 and the pressure head 11 directly push the piston 10, and inject the mixed liquid medicine into the human body through the needle 5 to complete the whole operation process.

Certainly, the injector as mentioned above is not only this kind of structure, also can adorn a card-type solvent bottle 3 in the sliding sleeve 2, and one end of a U-shaped push rod 21 penetrates the sliding sleeve 2 bottoms and connects with the solvent bottle 3 again. The inner piston 22 offsets each other (see FIG. 10 ), and the liquid medium can enter the solute bottle 8 through the needle 5 to realize drug mixing by pushing the push rod 21 and the piston 22 . Then pull out the sliding sleeve 2, the solvent bottle 3 and the push rod 21 to implement the injection.

In order to shorten the length of the push rod 21 and meet the maximum stroke of the piston 22, the push rod 21 can also be made into a foldable push rod 23 as shown in FIG. 11 . As long as several sections of the foldable push rod 23 are straightened, the piston 22 can be pushed to move.

Claims (5)

1. A solvent front type sterile mixed drug cartridge syringe, comprising a solvent bottle (3) and a solute bottle (8), the mouth of the solute bottle (8) is socketed with a needle (5) The fixed sliding frame (7) is characterized in that the solvent bottle (3) is placed in the sliding sleeve (2), and the sliding sleeve (2) and the shell (9) are socketed and matched, and the bottleneck of the solvent bottle (3) is connected to the The bottlenecks of the solute bottle (8) are relative. 2. The solvent front type aseptic mixed drug cartridge syringe as claimed in claim 1, characterized in that a sliding frame (4) is tightly fitted on the bottleneck of the solvent bottle (3) and slides with the sliding frame (4) The matched needle sleeve (6), the needle sleeve (6) is in contact with the end face of the sliding frame (7). 3. The solvent front type aseptic mixed drug cartridge syringe as claimed in claim 1, characterized in that said solvent bottle (3) is a pre-charged vial, and the solute bottle (8) is a cartridge . 4. The solvent front type aseptic mixed drug cartridge syringe as claimed in claim 2, characterized in that claws or limit pits (18) are provided on the sliding frame (4), and in the sliding frame (4) 4) A limit pit or a claw (17) is correspondingly provided on the sliding fit needle sleeve (6). 5. The solvent front type aseptic mixed drug cartridge syringe according to claim 1, characterized in that the end of the sliding sleeve (2) is screwed or clamped with an end cap (1).

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