Novel pre-filled syringe

Abstract

The utility model relates to the technical field of medical supplies, in particular to a novel pre-filled syringe which comprises a needle cylinder, one end of the needle cylinder is provided with a breaking groove and a clamping block, the wall thickness of the position of the breaking groove is thinned so that the breaking groove can be broken due to stress, the size of the clamping block is matched with that of the clamping groove, the clamping block can be clamped in the clamping groove, and the clamping groove is formed in a needle cap. One end of the connecting rod is fixed with one end of the push rod, a piston is arranged at the other end of the push rod, the push rod can be separated from the piston, and the piston is arranged in the needle cylinder. The fracture groove is formed in one end of the needle cylinder, the wall thickness is thinned, torsion is generated on the end portion of the needle cylinder by rotating the needle cap, so that the thinned portion is fractured, the needle cylinder is separated from the needle head, a product is damaged, the product cannot be used for the second time, and the fractured needle head portion can be reserved in the needle cap and is not prone to disengagement. Potential safety hazards caused by needle exposure are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical supplies, in particular to a novel prefilled syringe. Background Art

[0002] Methotrexate injection adopts subcutaneous administration, which is a method of administration recommended by domestic and international guidelines. Compared with traditional oral methotrexate (MTX), it has fewer side effects, especially fewer gastrointestinal adverse reactions, and improves patient treatment compliance. Methotrexate injection is sealed in a prefilled syringe, which not only makes the prefilled syringe have the functions of storing drugs and ordinary injection, but also has huge demand in the pharmaceutical market due to its convenience of carrying, accurate and convenient administration, and low risk of contamination.

[0003] Patients usually use one hand during the injection process. The amount of drug dosage determines the length of the push rod. When the push rod is longer, the overall length of the syringe increases, which is not conducive to one-handed injection. After the prefilled syringe is used, the usual way of disposing it is to throw it into the trash can. Since the syringe as a whole is intact, there is a risk of reuse. At the same time, there is also the possibility of it being picked up and played with, which poses a certain safety hazard.

[0004] For this purpose, a novel prefilled syringe is proposed. Utility Model Content

[0005] The utility model aims to provide a novel prefilled syringe to solve the problems of inconvenience in one-handed injection operation and potential safety hazards caused by reuse and playing proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel prefilled syringe, comprising a syringe, one end of which is provided with a fracture groove and a clamping block, the wall thickness at the position of the fracture groove is thinned to facilitate fracture under force, the size of the clamping block is adapted to the clamping groove and can be clamped inside the clamping groove, the clamping groove is arranged inside the needle cap, a needle cover is arranged at the other end of the syringe, the needle cover is slidably connected to the push rod and the connecting rod, one end of the connecting rod is fixed to one end of the push rod, a piston is arranged at the other end of the push rod, the push rod and the piston can be detached, and the piston is arranged inside the syringe.

[0007] Preferably, the piston fits inside the syringe, the contacting portion between the piston and the syringe is sealed, the piston and the syringe are slidably connected, a groove is provided at one end of the piston, the size of the groove is matched with the boss, and the boss is provided at one end of the push rod.

[0008] Preferably, a connector is provided at one end of the needle cover, the size of the connector is matched with the size of the inner wall of the syringe, and the connector is arranged inside the syringe.

[0009] Preferably, the outer wall of the syringe fits with the inner wall of the connecting rod and can slide against each other, and a push handle is provided at one end of the connecting rod.

[0010] Preferably, a ferrule is provided at one end of the needle cap, a convex edge is provided at one end of the ferrule, the size of the convex edge is matched with the limiting groove, and the limiting groove is provided on the outer side of one end of the syringe.

[0011] Preferably, a notch is provided at one end of the card slot, and the size of the notch is larger than the size of the card block.

[0012] Preferably, a needle is provided at one end of the syringe, and when the needle cap moves toward the side wall of the syringe, the needle will be inserted into the inside of the rubber block, the rubber block is provided inside one end of the needle cap, and a convex ring is provided on the outer side wall of the needle cap.

[0013] Preferably, when the syringe and the needle cover are not assembled, a sealing film is provided at one end of the syringe, and a capacity scale line is provided on the outer wall of the syringe.

[0014] Beneficial effects of the utility model:

[0015] 1. The utility model provides a fracture groove at one end of the syringe to thin the wall thickness, and generates a torque on the end of the syringe by rotating the needle cap to fracture the thinned portion, so that the syringe and the needle are separated, thereby damaging the product and making the product unusable for a second time. The fractured needle portion can be retained inside the needle cap and is not easily detached, thereby avoiding safety hazards caused by exposed needles.

[0016] 2. The utility model designs a connecting rod to push the push handle at the middle and upper part of the syringe to inject the medicine into the human body, which is convenient for patients to perform one-handed injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is an overall stereogram of a novel prefilled syringe according to an embodiment of the utility model;

[0019] Figure 2 A novel prefilled syringe according to an embodiment of the present invention Figure 1 Sectional view at AA;

[0020] Figure 3 A novel prefilled syringe according to an embodiment of the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 4 It is a partial three-dimensional schematic diagram of a novel prefilled syringe according to an embodiment of the utility model;

[0022] Figure 5 It is a partial three-dimensional schematic diagram of a novel prefilled syringe according to an embodiment of the utility model;

[0023] Figure 6 It is a partial three-dimensional schematic diagram of a novel prefilled syringe according to an embodiment of the utility model;

[0024] Figure 7 It is a partial three-dimensional schematic diagram of a novel prefilled syringe according to an embodiment of the utility model.

[0025] The markings in the figure are: 1. syringe; 2. needle cap; 3. needle cover; 4. connector; 5. push rod; 6. convex handle; 7. piston; 8. connecting rod; 9. push handle; 10. needle; 11. breaking groove; 12. limiting groove; 13. clamping block; 14. clamping groove; 15. clamping sleeve; 16. convex edge; 17. rubber block; 18. convex ring; 19. sealing membrane. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 7As shown, a specific embodiment of the utility model provides a novel prefilled syringe, including a syringe 1, one end of the syringe 1 is provided with a breaking groove 11 and a clamping block 13, the wall thickness at the position of the breaking groove 11 is thinned to facilitate fracture under force, the size of the clamping block 13 is adapted to the clamping groove 14 and can be clamped inside the clamping groove 14, the clamping groove 14 is arranged inside the needle cap 2, the other end of the syringe 1 is provided with a needle cover 3, the needle cover 3 is slidably connected with the push rod 5 and the connecting rod 8, one end of the connecting rod 8 is fixed to one end of the push rod 5, the other end of the push rod 5 is provided with a piston 7, the push rod 5 and the piston 7 can be detached, and the piston 7 is arranged inside the syringe 1.

[0029] By adopting the above technical solution, the utility model is designed with a clamping block 13. By moving and adjusting the position of the needle cap 2, the clamping block 13 is clamped into the clamping groove 14, and the needle cap 2 is continuously rotated. Since the side wall of the fracture groove 11 is relatively thin, the torque generated by the rotation causes the fracture groove 11 to fracture, thereby damaging the product and making it impossible to use the product a second time. By arranging the connecting rod 8, the push handle 9 can be pushed at the middle and upper part of the syringe 1 to inject the medicine into the human body, making it convenient for the patient to perform one-handed injection.

[0030] Specifically, Figure 2 As shown, the piston 7 fits with the interior of the syringe 1, the contact portion between the piston 7 and the syringe 1 is sealed, the piston 7 is slidably connected with the syringe 1, and a groove is provided at one end of the piston 7, the size of the groove is adapted to the protruding handle 6, and the protruding handle 6 is provided at one end of the push rod 5.

[0031] By adopting the above technical solution, the lug 6 is separated from the piston 7. After the injection is completed, the piston 7 cannot be moved by pulling the push rod 5, further reducing the probability of multiple uses of the product.

[0032] Specifically, Figure 2 As shown, a connector 4 is provided at one end of the needle cover 3 , the size of the connector 4 matches the size of the inner wall of the syringe 1 , and the connector 4 is arranged inside the syringe 1 .

[0033] By adopting the above technical solution, by setting the connector 4, the connector 4 can be clamped inside the syringe 1, which facilitates the assembly of the needle cover 3 and the syringe 1. The needle cover 3 is used to assist the movement of the push rod 5 to avoid displacement during the movement of the push rod 5.

[0034] Specifically, Figure 1 and Figure 2 As shown, the outer wall of the syringe 1 fits with the inner wall of the connecting rod 8 and can slide against each other, and a push handle 9 is provided at one end of the connecting rod 8.

[0035] By adopting the above technical solution, a push handle 9 is provided to facilitate the movement of the connecting rod 8 and the push rod 5. The outer wall of the syringe 1 fits with the inner wall of the connecting rod 8 and can slide against each other, further helping to avoid deviation of the push rod 5 during movement, resulting in an unsmooth situation when pushing the injection.

[0036] Specifically, Figure 4 and Figure 7 As shown, a clamping sleeve 15 is provided at one end of the needle cap 2 , and a convex edge 16 is provided at one end of the clamping sleeve 15 . The size of the convex edge 16 is matched with the limiting groove 12 , and the limiting groove 12 is provided on the outer side of one end of the syringe 1 .

[0037] By adopting the above technical solution, the convex edge 16 is clamped in the limiting groove 12 to enhance the installation stability of the needle cap 2 and the syringe 1. The limiting groove 12 also serves as a mark that the needle cap 2 and the syringe 1 are installed in place.

[0038] Specifically, Figure 4 and Figure 7 As shown, a notch is provided at one end of the card slot 14 , and the size of the notch is larger than the size of the card block 13 .

[0039] By adopting the above technical solution, the needle cap 2 is pushed, the block 13 passes through the gap and fits against the inner wall of the slot 14 , and the torque generated by rotating the needle cap 2 pushes the block 13 , causing the fracture groove 11 to fracture.

[0040] Specifically, Figure 3 As shown, a needle 10 is provided at one end of the syringe 1. When the needle cap 2 moves toward the side wall of the syringe 1, the needle 10 will be inserted into the inside of the rubber block 17. The rubber block 17 is provided inside one end of the needle cap 2. A convex ring 18 is provided on the outer side wall of the needle cap 2.

[0041] By adopting the above technical solution, when the needle cap 2 moves to fit the side wall of the syringe 1, the needle 10 is inserted into the inside of the rubber block 17. When the breaking groove 11 breaks, the broken part of the needle 10 is not easy to fall out from the inside of the needle cap 2 due to the restriction of the rubber block 17 and the card slot 14. The side wall of the needle cap 2 is provided with a convex ring 18 to increase friction and facilitate the rotation of the needle cap 2 to break the syringe 1 and separate the needle 10.

[0042] Specifically, Figure 5 As shown, when the syringe 1 and the needle cover 3 are not assembled, a sealing film 19 is provided at one end of the syringe 1, and a capacity scale line is provided on the outer wall of the syringe 1.

[0043] By adopting the above technical solution, a sealing film 19 is provided at one end of the syringe 1 to seal the filled product and increase the storage period. The outer wall of the syringe 1 is provided with a capacity scale line to facilitate the patient to inject according to the dosage in the instruction manual.

[0044] Working principle: take out the product, tear off the sealing film 19, install the needle cover 3 at one end of the syringe 1, remove the needle cap 2, discharge the gas inside the syringe 1 and the excess dose of the drug, wipe the skin for disinfection, control the inclination angle of the syringe 1 to be suitable for subcutaneous injection, insert the needle 10 into the body, push the push handle 9 to slowly inject the drug into the body, pull it out after the injection is completed, put the needle cap 2 on the syringe 1 and rotate to adjust the angle, so that the position of the sleeve 15 and the limit groove 12 are roughly aligned, push the needle cap 2 over the limit groove 12, and after the block 13 hits the inner wall of the slot 14, rotate the needle cap 2 to break and separate the needle 10 from the syringe 1, and then put it into the trash can.

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0046] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A novel prefilled syringe, comprising a syringe (1), characterized in that: One end of the syringe (1) is provided with a fracture groove (11) and a clamping block (13); the wall thickness at the position of the fracture groove (11) is thinned to facilitate fracture under stress; the size of the clamping block (13) is adapted to the clamping groove (14) and can be clamped inside the clamping groove (14); the clamping groove (14) is arranged inside the needle cap (2); the other end of the syringe (1) is provided with a needle cover (3); the needle cover (3) is slidably connected to the push rod (5) and the connecting rod (8); one end of the connecting rod (8) is fixed to one end of the push rod (5); the other end of the push rod (5) is provided with a piston (7); the push rod (5) and the piston (7) can be detached; the piston (7) is arranged inside the syringe (1).

2. A novel prefilled syringe according to claim 1, characterized in that: The piston (7) fits in with the interior of the syringe (1), the contacting portion of the piston (7) and the syringe (1) is sealed, the piston (7) and the syringe (1) are slidably connected, one end of the piston (7) is provided with a groove, the size of the groove is adapted to the lug (6), and the lug (6) is provided at one end of the push rod (5).

3. A novel prefilled syringe according to claim 1, characterized in that: A connector (4) is provided at one end of the needle cover (3); the size of the connector (4) is matched to the size of the inner wall of the syringe (1); and the connector (4) is arranged inside the syringe (1).

4. A novel prefilled syringe according to claim 1, characterized in that: The outer wall of the syringe (1) fits with the inner wall of the connecting rod (8) and can slide against each other. A push handle (9) is provided at one end of the connecting rod (8).

5. A novel prefilled syringe according to claim 1, characterized in that: A clamping sleeve (15) is provided at one end of the needle cap (2), and a convex edge (16) is provided at one end of the clamping sleeve (15). The size of the convex edge (16) is matched with the limiting groove (12), and the limiting groove (12) is provided on the outer side of one end of the syringe (1).

6. A novel prefilled syringe according to claim 1, characterized in that: A notch is provided at one end of the card slot (14), and the size of the notch is larger than the size of the card block (13).

7. A novel prefilled syringe according to claim 1, characterized in that: A needle (10) is arranged at one end of the syringe (1), and when the needle cap (2) moves toward the side wall of the syringe (1), the needle (10) is inserted into the interior of a rubber block (17), and the rubber block (17) is arranged inside one end of the needle cap (2), and a convex ring (18) is arranged on the outer side wall of the needle cap (2).

8. A novel prefilled syringe according to claim 1, characterized in that: When the syringe (1) and the needle cover (3) are not assembled, a sealing film (19) is provided at one end of the syringe (1), and a capacity scale line is provided on the outer wall of the syringe (1).

Images