Disposable sterile injection needle
By designing the locking structure of the piston rod in the injection needle, the risk of cross-infection caused by the lack of self-locking structure of the existing syringe is solved, and the effective prevention of reuse of the syringe is achieved.
Patent Information
- Application Number
- CN202420385491.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing syringes lack self-locking structure, making it difficult to prevent them from being recycled and used, resulting in a risk of cross-infection.
A sterile injection needle including a cylinder, a piston rod and a needle is designed. The piston rod is fitted through a snap point and a slide groove, and combined with a raised structure to achieve the locking of the piston rod to prevent the syringe from being reused.
Effectively prevent syringes from being recycled and flowing into the market, reducing the risk of cross-infection.
Smart Images
Figure CN222445024U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of injection needles, in particular to a disposable sterile injection needle. Background Art
[0002] Disposable syringes are commonly used to inject liquid medicines into the body to treat or prevent diseases. They are usually made of plastic, are intended for single use and are not reusable, which can reduce the risk of cross infection.
[0003] Although current syringes are required to be used once, they do not have a self-locking structure, which makes it difficult to prevent the syringes from being recycled and used again. The recycled disposable syringes flow into the market again, which poses a risk of cross infection. For this reason, we have proposed a disposable sterile injection needle. Utility Model Content
[0004] In order to solve the problem that although the current syringes are required to be used once, they do not have a self-locking structure, making it difficult to prevent the syringes from being recycled and used again, and the recycled disposable syringes flow into the market again, which poses a risk of cross infection, the utility model provides the following technical solutions: a disposable sterile injection needle, comprising a syringe, the syringe comprising a barrel, a piston rod and a needle, a joint is arranged at the bottom end of the barrel, the barrel and the joint are an integrally formed structure, and the barrel and the joint are internally connected, the needle is detachably sleeved on the joint, the piston rod comprises a push rod and a piston head, one end of the push rod is movably inserted into the barrel and fixedly mounted with the piston head, the edge of the piston head can be slidably connected to the inner wall of the barrel, and a clamping point is arranged on the side wall of the piston head, a slide groove is opened on the inner wall of the barrel, the clamping point can slide in the slide groove, the clamping point cooperates with the slide groove to enable the piston rod to slide along the slide groove, a protrusion is arranged at one end of the slide groove close to the joint, the protrusion is triangular, the protrusion can allow the clamping point to pass downward, and the piston rod can be locked when the clamping point is located below the protrusion.
[0005] Preferably, the side wall of the cylinder is provided with a scale bar, the scale bar has a plurality of scale lines parallel to each other, the scale lines are flush with the bottom edge of the piston head, and the scale bar is provided to facilitate reading the amount of the medicinal solution.
[0006] Preferably, a slide groove branch is also provided in the cylinder, and the slide groove branch has a vertical groove and an oblique groove, and the oblique groove is connected to the slide groove. The card point can slide into the slide groove through the slide groove branch, and the piston rod can be locked by sliding the card point into the slide groove branch during assembly to avoid accidental operation and locking of the piston rod.
[0007] Preferably, two handles are provided at the top of the cylinder body, the two handles are symmetrically arranged, and the two handles and the cylinder body are an integrally formed structure.
[0008] Preferably, the piston head is elastic and can expand and seal the slide groove and the slide groove branches when the piston head slides in the cylinder, thereby preventing the medicine liquid from flowing out through the slide groove and the slide groove branches.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] By inserting the needle into the medicine liquid, and then using the piston rod to cooperate with the cylinder, fixing the fingers on the handle, and exerting force to lift the piston rod to draw the medicine liquid into the cylinder. At the beginning of extraction, the piston head is at the bottom of the inner wall of the cylinder, and the card point is in the branch of the slide groove. In the process of lifting the piston rod to extract the medicine liquid, the card point slides upward along the vertical groove through the oblique groove into the slide groove. When the piston rod is pushed downward for injection, the card point can always slide downward along the slide groove, and when the card point passes through the protrusion and reaches the bottom of the protrusion, the protrusion prevents the piston rod from sliding upward, and locks the piston head between the bottom of the inner wall of the cylinder and the protrusion, thereby preventing the syringe from being recycled again and flowing into the market, reducing the risk of cross infection. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0012] Figure 1 It is a front view structural schematic diagram of the utility model as a whole;
[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;
[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model when the piston rod is in an upwardly lifted state;
[0015] In the figure: 1. syringe; 2. cylinder body; 3. piston rod; 4. needle; 5. joint; 6. push rod; 7. piston head; 8. card point; 9. slide groove; 10. protrusion; 11. scale bar; 12. slide groove branch; 13. vertical groove; 14. oblique groove; 15. handle. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0017] Depend on Figure 1-3The utility model comprises a syringe 1, which comprises a cylinder body 2, a piston rod 3 and a needle 4. A joint 5 is provided at the bottom end of the cylinder body 2. The cylinder body 2 and the joint 5 are an integrally formed structure, and the cylinder body 2 and the joint 5 are internally communicated. The needle 4 is detachably mounted on the joint 5. The piston rod 3 comprises a push rod 6 and a piston head 7. One end of the push rod 6 is movably inserted into the cylinder body 2 and fixedly mounted with the piston head 7. The edge of the piston head 7 can be slidably connected to the inner wall of the cylinder body 2, and a card point 8 is provided on the side wall of the piston head 7. A slide groove 9 is provided on the inner wall of the cylinder body 2. The card point 8 can slide in the slide groove 9. The card point 8 cooperates with the slide groove 9 to enable the piston rod 3 to slide along the slide groove 9. A protrusion 10 is provided at one end of the slide groove 9 close to the joint 5. The protrusion 10 is triangular. The protrusion 10 can allow the card point 8 to pass downward. When the card point 8 is located below the protrusion 10, the piston rod 3 can be locked.
[0018] The side wall of the cylinder 2 is provided with a scale bar 11, which has a plurality of scale lines parallel to each other, and the scale lines are flush with the bottom edge of the piston head 7. The scale bar 11 is provided to facilitate reading the amount of the liquid medicine.
[0019] A slide groove branch 12 is also provided in the cylinder 2. The slide groove branch 12 has a vertical groove 13 and an oblique groove 14. The oblique groove 14 is connected to the slide groove 9. The card point 8 can slide into the slide groove 9 through the slide groove branch 12. During assembly, by sliding the card point 8 into the slide groove branch 12, it is possible to avoid locking the piston rod 3 due to accidental operation.
[0020] Two handles 15 are provided at the top of the cylinder 2 . The two handles 15 are symmetrically arranged, and the two handles 15 and the cylinder 2 are an integrally formed structure.
[0021] The piston head 7 is elastic and can expand and seal the slide groove 9 and the slide groove branch 12 when sliding in the cylinder 2 , thereby preventing the medicine from flowing out through the slide groove 9 and the slide groove branch 12 .
[0022] Working principle: by inserting the needle 4 into the medicine liquid, and then using the piston rod 3 to cooperate with the cylinder 2, the fingers are fixed on the handle 15, and the piston rod 3 is lifted up to extract the medicine liquid into the cylinder 2. At the beginning of extraction, the piston head 7 is against the bottom of the inner wall of the cylinder 2, and the card point 8 is in the slide groove branch 12. In the process of lifting the piston rod 3 to extract the medicine liquid, the card point 8 slides upward along the vertical groove 13 through the oblique groove 14 into the slide groove 9. When the piston rod 3 is pushed downward for injection, the card point 8 can always slide downward along the slide groove 9, and when the card point 8 passes through the protrusion 10 and reaches the bottom of the protrusion 10, the protrusion 10 prevents the piston rod 3 from sliding upward, and locks the piston head 7 between the bottom of the inner wall of the cylinder 2 and the protrusion 10, thereby preventing the syringe from being recycled again and flowing into the market, reducing the risk of cross infection.
[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A disposable sterile injection needle, comprising a syringe (1), characterized in that: The syringe (1) comprises a barrel (2), a piston rod (3) and a needle (4); a joint (5) is provided at the bottom end of the barrel (2); the barrel (2) and the joint (5) are an integrally formed structure, and the barrel (2) and the joint (5) are internally connected; the needle (4) is detachably mounted on the joint (5); the piston rod (3) comprises a push rod (6) and a piston head (7); one end of the push rod (6) is movably inserted into the barrel (2) and fixedly mounted with the piston head (7); the edge of the piston head (7) is slidably connected to the barrel ( 2) inner wall, and the side wall of the piston head (7) is provided with a card point (8), the inner wall of the cylinder (2) is provided with a slide groove (9), the card point (8) can slide in the slide groove (9), the card point (8) cooperates with the slide groove (9) to enable the piston rod (3) to slide along the slide groove (9), and a protrusion (10) is provided at one end of the slide groove (9) close to the joint (5), the protrusion (10) is triangular, and the protrusion (10) can allow the card point (8) to pass downward, and when the card point (8) is located below the protrusion (10), the piston rod (3) can be locked.
2. The disposable sterile injection needle according to claim 1, characterized in that: The side wall of the cylinder (2) is provided with a scale bar (11), the scale bar (11) having a plurality of scale lines parallel to each other, and the scale lines are flush with the bottom edge of the piston head (7).
3. The disposable sterile injection needle according to claim 2, characterized in that: A slide groove branch (12) is also provided in the cylinder (2), and the slide groove branch (12) has a vertical groove (13) and an oblique groove (14), and the oblique groove (14) is connected to the slide groove (9), and the clamping point (8) can slide into the slide groove (9) through the slide groove branch (12).
4. The disposable sterile injection needle according to claim 3, characterized in that: Two handles (15) are provided at the top end of the cylinder (2); the two handles (15) are symmetrically arranged, and the two handles (15) and the cylinder (2) are an integrally formed structure.
5. The disposable sterile injection needle according to claim 4, characterized in that: The piston head (7) is elastic and can expand and seal the slide groove (9) and the slide groove branch (12) when the piston head (7) slides in the cylinder (2), thereby preventing the medicine liquid from flowing out through the slide groove (9) and the slide groove branch (12).