A medicament-dispensing syringe

Abstract

The present invention relates to the technical field of medical devices, and specifically to a dispensable syringe, comprising a first barrel and a second barrel that are interconnected, a needle connected to one end of the first barrel away from the second barrel, a first piston disposed in the first barrel, a second piston disposed in the second barrel, the second piston being able to separate the first barrel and the second barrel, a connecting port being disposed on the first piston, a push rod being connected to the second piston, the push rod being able to push the second piston into the first barrel, push the first piston to move, and close the connecting port. The mixing and injection of the liquid medicine are completed at one time, reducing the number of punctures, improving efficiency, and reducing the risk of medical personnel being stabbed, the dispensing process is completed in the first barrel and the second barrel, the liquid medicine and powder are not in contact with the outside air, reducing the risk of drug and environmental contamination.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a syringe capable of dispensing medicine. Background Art

[0002] Clinical injection usually includes the following steps: extracting liquid with a disposable empty needle → injecting the liquid into the medicine bottle → mixing the liquid → extracting the liquid → injecting it into the liquid bag. The whole liquid preparation process is cumbersome, which increases the workload of nurses and the risk of being stabbed. In addition, the repeated puncture operation process increases the chance of the liquid being contaminated.

[0003] Therefore, a technical solution is currently needed to solve the technical problem that multiple puncture operations are required during the medication dispensing process, which increases the workload of nurses and also increases the risk of punctures and the risk of drug contamination. Summary of the invention

[0004] The purpose of the invention is to provide a dispensing syringe to address the technical problems in the prior art that multiple puncture operations are required during the dispensing process, which increases the workload of nurses and also increases the risk of punctures and the risk of drug contamination.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A dispensing syringe comprises a first barrel and a second barrel connected to each other, wherein one end of the first barrel away from the second barrel is connected to a needle, a first piston is arranged in the first barrel, a second piston is arranged in the second barrel, the second piston can separate the first barrel and the second barrel, a connecting port is arranged on the first piston, the second piston is connected to a push rod, the push rod can push the second piston into the first barrel, push the first piston to move, and close the connecting port.

[0007] The present invention discloses a syringe capable of dispensing medicine, wherein the second cylinder is used for containing medicine powder, and the first cylinder is used for containing medicine liquid. Before dispensing medicine, the second piston separates the internal space of the first cylinder and the second cylinder. When dispensing medicine, the push rod pushes the second piston to move into the first cylinder, and the internal space of the first cylinder and the second cylinder is communicated, so that the medicine liquid can enter the second cylinder, and the medicine powder can also enter the first cylinder. Dispensing medicine is completed in the process of turning over the syringe. When injecting, the syringe is turned over so that the mixed medicine is in a chamber on one side of the first cylinder away from the second cylinder, and the push rod pushes the second piston to connect with the first piston, closes the communication port, and then the second piston continues to push the first piston so that the medicine is discharged from the needle.

[0008] Furthermore, the mixing and injection of the drug solution can be completed at one time, which reduces the number of punctures, improves efficiency and reduces the risk of medical staff being stabbed;

[0009] Furthermore, the dispensing process is completed within the first cylinder and the second cylinder, and the liquid medicine and powder do not come into contact with the external air, reducing the risk of drug and environmental contamination.

[0010] As a preferred embodiment of the present invention, a limiting cage is provided on the inner wall of one end of the first cylinder connecting the second cylinder. The limiting cage includes at least three limiting rods, each limiting rod is arranged along the axis of the first cylinder, and all the limiting rods are uniformly arranged around the communication port. All the limiting rods enclose a cylindrical shape adapted to the shape of the second piston. After the second piston extends into the first cylinder, it is limited by the limiting rods, so that the second piston can be accurately docked with the first piston. At the same time, the gap formed between the limiting rods facilitates the passage of the liquid medicine, and the liquid medicine can enter the second cylinder through the limiting cage during dispensing.

[0011] As a preferred embodiment of the present invention, a receiving housing is connected to the end of the second cylinder away from the first cylinder, and the receiving housing is used to place the medicinal powder. Specifically, the receiving housing is set as a spherical shape to increase the storage space of the medicinal powder and ensure that the dosage of the medicinal powder can meet the use requirements.

[0012] As a preferred embodiment of the present invention, a guiding cylinder is provided at the end of the receiving housing away from the second cylinder, and the inner diameter of the guiding cylinder is adapted to the diameter of the push rod. When the second piston enters the first cylinder, since the diameter of the push rod is smaller than the diameter of the second cylinder, the movement direction of the second piston is likely to deviate. By providing the guiding cylinder to limit the position of the push rod, the push rod and the second piston will not be displaced during the movement process, so that the second piston can smoothly close the communication port on the first piston and drive the first piston to push the liquid medicine.

[0013] As a preferred embodiment of the present invention, an elastic pad is provided on the inner wall of the guiding cylinder. This makes the limit of the guiding cylinder on the push rod more stable, and the elastic pad can enhance the sealing between the push rod and the guiding cylinder, thereby reducing the risk of liquid medicine leakage during the mixing process of the liquid medicine and the medicinal powder.

[0014] As a preferred embodiment of the present invention, a limiting groove communicating with the communication port is provided on the side of the first piston close to the second piston, and the limiting groove is adapted to the shape of the second piston. When the second piston pushes against the first piston, the second piston can be embedded in the limiting groove of the first piston, so that the second piston is more stable when pushing against the first piston and is not easy to slip. Furthermore, the second piston can better seal the communication port on the first piston, and when injecting the liquid medicine, the liquid medicine is not easy to leak through the communication port.

[0015] As a preferred solution of the present invention, one end of the first cylinder where the needle is arranged is connected to a cylinder shell, and the cylinder shell can slide along the axial direction of the first cylinder, and the needle is located in the cylinder shell to shield the needle. After the injection is completed, the cylinder shell can be pressed, and the first cylinder can be pulled up relative to the cylinder shell. The cylinder shell moves relative to the first cylinder to the end of the first cylinder, so that the needle is located in the cylinder shell. The cylinder shell effectively shields the needle, reducing the risk of being stabbed by the needle.

[0016] As a preferred solution of the present invention, a bottom plate is provided at one end of the cylinder shell away from the second cylinder body, and a through hole is provided on the bottom plate for avoiding the needle. After the cylinder shell moves to the end of the first cylinder body, the cylinder shell shields the needle more tightly, reducing the risk of being stabbed by the needle.

[0017] As a preferred solution of the present invention, a slide groove is provided on the side wall of the first cylinder along the length direction of the first cylinder, and a slider adapted to the slide groove is provided on the inner wall of the cylinder shell, so that the cylinder shell and the first cylinder can be slidably connected, so that after the injection is completed, the cylinder shell can move to the end of the first cylinder to cover the needle through relative movement with the first cylinder.

[0018] As a preferred solution of the present invention, the end of the slideway close to the needle is connected to a limit slot, and the limit slot is arranged perpendicular to the slideway. After the slider slides along the slideway to the end of the slideway, it can be inserted into the limit slot, so that after the cylinder shell slides along the first cylinder body to the end of the first cylinder body, it can be limited by the limit slot to prevent the cylinder shell from moving along the slideway and exposing the needle again.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] 1. The mixing and injection of the drug solution are completed at one time, which reduces the number of punctures, improves efficiency and reduces the risk of medical staff being stabbed;

[0021] 2. The dispensing process is completed in the first cylinder and the second cylinder, and the liquid medicine and powder do not come into contact with the outside air, reducing the risk of drug and environmental contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a syringe capable of dispensing medicine according to the present invention;

[0023] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0025] Figure 4is a schematic structural diagram of the first cylinder of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the cylinder shell of the present invention;

[0027] Markings in the figure: 1-first cylinder, 11-slide groove, 12-limiting slot, 2-first piston, 21-communication port, 22-limiting groove, 3-needle, 4-second cylinder, 5-second piston, 6-push rod, 7-accommodating shell, 8-guide cylinder, 81-elastic pad, 9-cylinder shell, 91-slider, 92-bottom plate, 93-through hole, 10-limiting cage, 101-limiting rod, 102-connecting ring. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Example 1

[0031] like Figure 1 As shown, the present embodiment is a dispensing syringe, comprising a first barrel 1 and a second barrel 4 which are interconnected, and the first barrel 1 and the second barrel 4 are coaxially arranged, the end of the first barrel 1 away from the second barrel 4 is connected to a needle 3, a first piston 2 is arranged in the first barrel 1, a second piston 5 is arranged in the second barrel 4, the second piston 5 can separate the first barrel 1 and the second barrel 4, a connecting port 21 is arranged on the first piston 2, the second piston 5 is connected to a push rod 6, the push rod 6 can push the second piston 4 into the first barrel 1, push the first piston 2 to move, and close the connecting port 21.

[0032] Before dispensing, the powder is stored in the second cylinder 4, the liquid medicine is stored in the first cylinder 1, the first piston 2 is located in the first cylinder 1, the second piston 5 is located in the second cylinder 4, and the second piston 5 isolates the powder in the second cylinder 4. The whole device is placed vertically. When dispensing, the second piston 5 is pushed by the push rod 6 to move into the first cylinder 1. At the same time, the first cylinder 1 is turned over so that the liquid medicine enters the second cylinder 4 through the gap between the communication port 21 and the push rod 6. The liquid medicine is mixed with the powder to complete the dispensing. When injecting the medicine, the first cylinder 1 is placed vertically so that the mixed liquid medicine enters the cavity formed by the second cylinder 4 and the first piston 2. The second piston 5 is driven by the push rod 6 to push against the first piston 2, and the communication port 21 on the first piston 2 is closed by the second piston 5. The first piston 2 and the second piston 5 are driven by the push rod 6 to push the mixed liquid medicine to be injected through the needle 3.

[0033] Furthermore, the mixing and injection of the liquid medicine are completed at one time, reducing the number of punctures. While improving the efficiency, it also reduces the risk of medical staff being stabbed.

[0034] Furthermore, the dispensing process is completed in the first cylinder 1 and the second cylinder 4, and the liquid medicine and the powder do not come into contact with the external air, reducing the risk of drug and environmental pollution.

[0035] Embodiment 2

[0036] As Figure 1 shown, in this embodiment, the difference from Embodiment 1 is that a limiting cage 10 is provided on the inner wall of the end of the first cylinder 1 connecting the second cylinder 3. The limiting cage 10 includes at least three limiting rods 101. Each limiting rod 101 is arranged along the axis of the first cylinder 1. All the limiting rods 101 are uniformly arranged around the communication port 21. All the limiting rods 101 enclose a cylinder shape adapted to the shape of the second piston 5. After the second piston 5 extends into the first cylinder 1, it is limited by the limiting rods 101, so that the second piston 5 can be accurately docked with the first piston 2. At the same time, the gap formed between the limiting rods 101 is convenient for the liquid medicine to pass through. When dispensing, the liquid medicine can enter the second cylinder 4 through the limiting cage 10.

[0037] Furthermore, the limiting cage 10 further includes a connecting ring 102. The connecting ring 102 is arranged between the limiting rods 101 and the second piston 5. Each limiting rod 101 is connected to the connecting ring 102. By connecting the connecting ring 102 to the end of each limiting rod 101, the structure of the whole limiting cage 10 is stable, and the moving direction of the second piston 5 is more stable during the extension process in the limiting cage 10.

[0038] Embodiment 3

[0039] As Figure 1As shown in the figure, in this embodiment, the difference from Embodiment 1 is that a receiving housing 7 is connected to one end of the second cylinder 4 away from the first cylinder 1. The receiving housing 7 is used to place the medicinal powder. Specifically, the receiving housing 7 is set as a spherical shape to increase the storage space of the medicinal powder and ensure that the dosage of the medicinal powder can meet the usage requirements.

[0040] Embodiment 4

[0041] As Figure 1 and Figure 2 As shown in the figure, in this embodiment, the difference from Embodiment 2 is that a guiding cylinder 8 is provided at one end of the receiving housing 7 away from the second cylinder 4. The inner diameter of the guiding cylinder 8 is adapted to the diameter of the push rod 6. When the second piston 5 enters the first cylinder 1, since the diameter of the push rod 6 is smaller than the diameter of the second cylinder 4, the movement direction of the second piston 5 is likely to deviate. By providing the guiding cylinder 8 to limit the position of the push rod 6, the push rod 6 and the second piston 5 will not deviate during the movement process, so that the second piston 5 can smoothly close the communication port 21 on the first piston 2 and drive the first piston 2 to push the liquid medicine.

[0042] Furthermore, an elastic pad 81 is provided on the inner wall of the guiding cylinder 8 to make the limit of the guiding cylinder 8 on the push rod 6 more stable. Moreover, the elastic pad 81 can enhance the sealing performance between the push rod 6 and the guiding cylinder 8, thereby reducing the risk of liquid medicine leakage during the mixing process of the liquid medicine and the medicinal powder.

[0043] Embodiment 5

[0044] As Figure 1 As shown in the figure, in this embodiment, the difference from Embodiment 1 is that a limiting groove 22 communicating with the communication port 21 is provided on one side of the first piston 2 close to the second piston 5. The limiting groove 22 is adapted to the shape of the second piston 5. When the second piston 5 pushes against the first piston 2, the second piston 5 can be embedded into the limiting groove 22 of the first piston 2, so that the connection between the second piston 5 and the first piston 2 is more stable during the pushing process and not easy to slip. Furthermore, the second piston 5 can better seal the communication port 21 on the first piston 2, so that when injecting the liquid medicine, the liquid medicine is not easy to leak through the communication port.

[0045] Embodiment 6

[0046] As Figure 1 、 Figure 3 、 Figure 4 and Figure 5As shown in the figure, in this embodiment, the difference from Embodiment 1 is that a cylinder shell 9 is connected to one end of the first cylinder body 1 where the needle is provided. The cylinder shell 9 can slide along the axial direction of the first cylinder body 1, and the needle 3 is located inside the cylinder shell 9 to shield the needle 3. After the liquid injection is completed, the cylinder shell 9 can be held down, and the first cylinder body 1 can be pulled up relative to the cylinder shell 9. The cylinder shell 9 moves relative to the first cylinder body 1 to the end of the first cylinder body 1, so that the needle 3 is located inside the cylinder shell 9, and the cylinder shell 9 effectively shields the needle 3, reducing the risk of being stabbed by the needle 3.

[0047] Specifically, a sliding groove 11 is provided on the side wall of the first cylinder body 1 along the length direction of the first cylinder body 1. A sliding block 91 adapted to the sliding groove 11 is provided on the inner wall of the cylinder shell 9, realizing the slidable connection between the cylinder shell 9 and the first cylinder body 1. After the medicine injection is completed, the cylinder shell 9 can move to the end of the first cylinder body 1 by relative movement with the first cylinder body 1 to shield the needle 3.

[0048] Furthermore, a limiting card slot 12 is connected to one end of the sliding groove 11 close to the needle 3. The limiting card slot 12 is arranged perpendicular to the sliding groove 11, so that after the sliding block 91 slides along the sliding groove 11 to the end of the sliding groove 11, it can be clamped into the limiting card slot 12. Thus, after the cylinder shell 9 slides along the first cylinder body 1 to the end of the first cylinder body 1, it can be limited by the limiting card slot 12 to prevent the cylinder shell 9 from slipping back along the sliding groove 11 and exposing the needle 3 again.

[0049] Furthermore, a bottom plate 92 is provided at one end of the cylinder shell 9 away from the second cylinder body 4. A through hole 93 for avoiding the needle 3 is provided on the bottom plate 92, so that after the cylinder shell 9 moves to the end of the first cylinder body 1, the shielding of the needle 3 by the cylinder shell 9 is more rigorous, reducing the risk of being stabbed by the needle 3.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A medicament-dispensing syringe, characterized in that, The invention comprises a first cylinder (1) and a second cylinder (4) which are connected to each other, wherein one end of the first cylinder (1) away from the second cylinder (4) is connected to a needle (3), a first piston (2) is arranged in the first cylinder (1), a second piston (5) is arranged in the second cylinder (4), the second piston (5) is capable of isolating the first cylinder (1) and the second cylinder (4), a connecting port (21) is arranged on the first piston (2), and the second piston (5) is connected to a push rod (6), the push rod (6) is capable of pushing the second piston (5) into the first cylinder (1) to push the first The piston (2) moves and closes the communication port (21); a limiting cage (10) is provided on the inner wall of one end of the first cylinder (1) connected to the second cylinder (4); the limiting cage (10) comprises at least three limiting rods (101); each limiting rod (101) is arranged along the axis of the first cylinder (1); all the limiting rods (101) are evenly arranged around the communication port (21); a limiting groove (22) communicating with the communication port (21) is provided on a side of the first piston (2) close to the second piston (5); the limiting groove (22) is adapted in shape to the second piston (5).

2. The medicament-dispensing syringe according to claim 1, wherein, One end of the second cylinder (4) away from the first cylinder (1) is connected to a containing shell (7), and the containing shell (7) is used to place medicine powder.

3. The medicament-dispensing syringe according to claim 2, wherein, A guide cylinder (8) is provided at one end of the accommodating shell (7) away from the second cylinder (4), and the inner diameter of the guide cylinder (8) is matched to the diameter of the push rod (6).

4. The medicament-dispensing syringe according to claim 3, characterized in that, An elastic pad (81) is provided on the inner wall of the guide cylinder (8).

5. The medicament-dispensing syringe according to claim 1, characterized in that, One end of the first cylinder (1) on which the needle (3) is arranged is connected to a cylinder shell (9); the cylinder shell (9) is capable of sliding along the axial direction of the first cylinder (1) to shield the needle (3).

6. The medicament-dispensing syringe according to claim 5, characterized in that, A bottom plate (92) is provided at one end of the cylinder shell (9) away from the second cylinder body (4), and a through hole (93) for avoiding the needle (3) is provided on the bottom plate (92).

7. The medicament-dispensing syringe according to claim 5, characterized in that, A slide groove (11) is provided on the side wall of the first cylinder (1) along the length direction of the first cylinder (1), and a sliding block (91) adapted to the slide groove (11) is provided on the inner wall of the cylinder shell (9).

8. The medicament-dispensing syringe according to claim 7, characterized in that, One end of the slide groove (11) close to the needle head (3) is connected to a limit slot (12), and the limit slot (12) is arranged perpendicular to the slide groove (11).

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