Buckle-type connection anti-needle-falling injector

Abstract

The invention is suitable for the technical field of medical instruments, and provides a buckle-type connection anti-needle-falling injector, which comprises a needle cylinder, a buckle-type connection part, a buckle-type connection part, a buckle-type connection part and a buckle-type connection part, the piston is arranged in the needle cylinder, and a pull rod is fixedly mounted on the piston; the connector is sleeved with the pintle, and a pintle head is arranged on the pintle; the mounting ring is fixedly mounted on the pintle; the mounting seat is fixedly mounted on the connector; the buckle mechanism is assembled on the mounting ring and the mounting seat; the buckle mechanism is used for fixing the pintle on the connector; the buckle mechanism comprises a placement block fixedly mounted at the bottom of the mounting ring; and the placing groove is formed in the mounting seat. According to the buckle type connection anti-needle-falling injector, the situation that the needle head falls off can be effectively prevented, and the safety and reliability of injection operation are high.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a snap-fit ​​connector anti-dislodgement syringe. Background Technology

[0002] A syringe is a common medical device, mainly used to inject liquids (such as drugs, vaccines, nutrient solutions, etc.) into the human body or to extract liquids (such as blood, body fluid samples, etc.) from the human body.

[0003] However, in the use of some existing syringes, the needle plug is often connected to the syringe barrel solely by friction. While this connection method is simple in structure and low in manufacturing cost, it has gradually revealed several safety hazards and operational limitations in clinical use: (1) Insufficient connection reliability: When rapidly injecting medication, drawing viscous body fluid, or performing deep tissue injection, the needle may become loose due to lateral force or back pressure, resulting in leakage of medication, inaccurate dosage, environmental pollution, or even needle puncture injury or cross-infection. (2) Poor operational stability: Especially in emergency treatment, continuous injection or patient movement, the connection maintained by friction alone is prone to accidental dislodgement due to mechanical vibration or changes in operating angle, affecting the continuity and safety of the treatment process. (3) Increased burden on medical staff: In order to prevent the needle from falling off, the operator often needs to pay extra attention to maintain the connection, and may even need to manually assist in fixing it. This not only distracts the medical staff, but may also affect the injection accuracy and efficiency. Therefore, existing syringes are prone to needle detachment during use, resulting in low safety and reliability of injection operations, and cannot better meet actual usage needs. Summary of the Invention

[0004] To address the technical problem mentioned in the background art that existing syringes are prone to needle detachment during use, resulting in low safety and reliability of injection operations and failing to better meet practical usage needs, this invention provides a snap-fit ​​anti-needle-detachment syringe.

[0005] The snap-fit ​​connector anti-dislodgement syringe provided by the present invention includes: a syringe barrel, on which a connector is fixedly mounted; a piston disposed inside the syringe barrel, on which a pull rod is fixedly mounted; a needle plug sleeved on the connector, on which a needle tip is disposed; a mounting ring fixedly mounted on the needle plug; a mounting seat fixedly mounted on the connector; and a snap-fit ​​mechanism assembled on the mounting ring and the mounting seat, the snap-fit ​​mechanism being used to fix the needle plug on the connector.

[0006] Preferably, the latching mechanism includes: a placement block fixedly installed at the bottom of the mounting ring; a placement groove formed on the mounting base, the placement block and the placement groove being adapted to each other; a second mounting cavity formed on the mounting base, the second mounting cavity containing a second spring; a compression block disposed in the second mounting cavity, the compression block being used to compress the second spring; a positioning rod fixedly installed on the compression block; and a positioning groove formed on the placement block, the positioning rod extending into the placement groove and being adapted to each other.

[0007] Preferably, the mounting base is provided with a limiting mechanism, which is used to limit the position of the positioning rod. The limiting mechanism includes: a first mounting cavity formed on the mounting base, a stop block provided in the first mounting cavity, the stop block being used to block and limit the end of the positioning rod; a long rod fixedly installed at the bottom of the stop block, a first spring sleeved on the long rod, and the stop block being used to compress the first spring; and a vertical rod fixedly installed on the long rod, the vertical rod being slidably connected to the placement groove, the vertical rod being located below the placement block, and the bottom end of the placement block abutting against the top end of the vertical rod.

[0008] Preferably, the mounting ring and the compression block are provided with an unlocking mechanism, which is used to disengage the positioning rod and the positioning groove. The unlocking mechanism includes: a connecting frame slidably mounted on the mounting base, one end of the connecting frame being fixedly connected to the compression block, and a vertical plate being fixedly mounted on the other end of the connecting frame; a mounting frame fixedly mounted on the mounting ring, on which a sliding rod is slidably mounted, a third spring being sleeved on the sliding rod, and a mounting block being fixedly sleeved on the sliding rod, the mounting block being used to compress the third spring; a compression seat fixedly mounted at the bottom of the sliding rod, the compression seat being used to compress the vertical plate, and after the vertical plate is compressed, it drives the connecting frame and the positioning rod to move away from the positioning groove; and a connecting plate fixedly mounted on the compression seat, through which medical personnel push the compression seat to move and compress the vertical plate.

[0009] Preferably, a connecting block is fixedly installed at the bottom of the mounting ring, and a connecting groove is provided on the mounting base, wherein the connecting groove and the connecting block are adapted to each other.

[0010] Preferably, a needle cap is fitted onto the needle plug to protect the needle tip.

[0011] Preferably, the syringe is provided with a reference scale, which medical personnel use to refer to the amount of liquid drawn by the syringe.

[0012] Preferably, two placement rings are symmetrically fixedly installed on the syringe.

[0013] Preferably, a telescopic rod is provided inside the second mounting cavity, and the telescopic rod is located inside the second spring.

[0014] Compared with related technologies, the snap-fit ​​anti-dislodgement syringe provided by the present invention has the following advantages: This invention provides a snap-fit ​​anti-needle-dislodgement syringe: it can effectively prevent the needle from falling off, and the injection operation is highly safe and reliable. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of a preferred embodiment of the snap-fit ​​anti-dislodgement syringe provided by the present invention; Figure 2 This is a schematic diagram of the front sectional view of the present invention; Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure; Figure 4 for Figure 3 An enlarged structural diagram of part B shown in the figure; Figure 5 for Figure 4 An enlarged structural diagram of section C shown in the figure; Figure 6 for Figure 4 An enlarged structural diagram of part D shown in the figure; Figure 7 This is a schematic diagram of the extrusion seat and connecting plate in this invention.

[0016] Labels in the diagram: 1. Syringe; 2. Piston; 3. Pull rod; 4. Connector; 5. Needle plug; 6. Needle tip; 7. Mounting ring; 8. Placement block; 9. Mounting seat; 10. Placement groove; 11. First mounting cavity; 12. Stop block; 13. First spring; 14. Long rod; 15. Vertical rod; 16. Second mounting cavity; 17. Second spring; 18. Compression block; 19. Positioning rod; 20. Positioning groove; 21. Connecting frame; 22. Mounting frame; 23. Slide rod; 24. Third spring; 25. Mounting block; 26. Compression seat; 27. Vertical plate; 28. Connecting plate; 29. ​​Connecting block; 30. Connecting groove; 31. Needle cap; 32. Reference scale; 33. Placement ring. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification and the foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification or the foregoing drawings of this application are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] This invention provides a snap-fit ​​anti-dislodgement syringe, such as... Figure 1-7 As shown, the snap-fit ​​anti-dislodgement syringe includes: a syringe 1, on which a connector 4 is fixedly mounted; a piston 2 disposed inside the syringe 1, on which a pull rod 3 is fixedly mounted; a needle plug 5 sleeved on the connector 4, on which a needle tip 6 is disposed; a mounting ring 7 fixedly mounted on the needle plug 5; a mounting seat 9 fixedly mounted on the connector 4; and a snap-fit ​​mechanism assembled on the mounting ring 7 and the mounting seat 9, the snap-fit ​​mechanism being used to fix the needle plug 5 on the connector 4.

[0020] In this embodiment, during use, the needle plug 5 is fitted onto the connector 4. Simultaneously, the mounting ring 7 and mounting base 9 are secured by a locking mechanism. This mechanism effectively resists injection, retraction, and lateral forces, preventing the needle 6 from accidentally loosening during operation, ensuring accurate drug dosage, and avoiding leakage and contamination. Furthermore, in emergency, continuous, or patient-movement scenarios, the locking mechanism stably maintains the connection, reducing the risk of detachment due to vibration or angle changes, ensuring the safety and continuity of the treatment process. Moreover, medical personnel do not require additional attention or manual assistance in securing the needle, allowing them to focus more on the injection operation itself, improving injection accuracy and work efficiency. Therefore, this syringe effectively prevents the needle 6 from detaching, ensuring high safety and reliability of the injection operation.

[0021] In a further preferred embodiment of the present invention, the latching mechanism includes: a placement block 8 fixedly installed at the bottom of the mounting ring 7; a placement groove 10 formed on the mounting base 9, wherein the placement block 8 and the placement groove 10 are adapted to be connected; a second mounting cavity 16 formed on the mounting base 9, wherein a second spring 17 is disposed in the second mounting cavity 16; a compression block 18 disposed in the second mounting cavity 16, wherein the compression block 18 is used to compress the second spring 17; a positioning rod 19 fixedly installed on the compression block 18; and a positioning groove 20 formed on the placement block 8, wherein the positioning rod 19 extends into the placement groove 10 and is adapted to be connected to the positioning groove 20.

[0022] In this embodiment, when the needle plug 5 is fitted onto the connector 4, the placement block 8 is inserted into the placement groove 10. During insertion, the placement block 8 triggers the limiting mechanism, which moves downward to disengage from the limiting of the end of the positioning rod 19. At this time, under the elastic force of the second spring 17, the compression block 18 and the positioning rod 19 are pushed towards the positioning groove 20 and extend into the placement groove 10 to connect with it, thereby fixing the placement block 8 in the placement groove 10. This locks and secures the mounting ring 7 and the mounting seat 9, effectively resisting injection, retraction, and lateral forces, preventing the needle 6 from accidentally loosening during operation, ensuring accurate drug dosage, and avoiding leakage and contamination. In emergency, continuous, or patient-moving scenarios, the locking mechanism can stably maintain the connection, reducing the risk of detachment due to vibration or angle changes, and ensuring the safety and continuity of the treatment process. At the same time, medical staff do not need extra attention or manual assistance in fixing, allowing them to focus more on the injection operation itself, resulting in high overall safety.

[0023] In a further preferred embodiment of the present invention, a limiting mechanism is provided on the mounting base 9. The limiting mechanism is used to limit the position of the positioning rod 19. The limiting mechanism includes: a first mounting cavity 11 formed on the mounting base 9, a stop block 12 provided in the first mounting cavity 11, the stop block 12 being used to block and limit the end of the positioning rod 19; a long rod 14 fixedly installed at the bottom of the stop block 12, a first spring 13 sleeved on the long rod 14, and the stop block 12 being used to compress the first spring 13; and a vertical rod 15 fixedly installed on the long rod 14, the vertical rod 15 being slidably connected to the placement groove 10, the vertical rod 15 being located below the placement block 8, and the bottom end of the placement block 8 abutting against the top end of the vertical rod 15.

[0024] In this embodiment, when the needle plug 5 is fitted onto the connector 4, the placement block 8 is inserted into the placement groove 10. During insertion, the placement block 8 presses down on the vertical rod 15, which in turn moves the long rod 14 and the stop block 12 downwards within the first mounting cavity 11. The downward-moving stop block 12 compresses the first spring 13. When the placement block 8 reaches the bottom of the placement groove 10, the stop block 12 disengages from the end of the positioning rod 19. At this point, under the elastic force of the second spring 17, the compression block 18 and the positioning rod 19 are pushed to move towards the positioning groove 20 and extend into the placement groove 10 to connect with it, thereby fixing the placement block 8 within the placement groove 10. This locks and secures the mounting ring 7 and the mounting base 9, thus firmly connecting the needle plug 5 and the connector 4, preventing the needle 6 from falling off, and ensuring high overall safety.

[0025] In a further preferred embodiment of the present invention, an unlocking mechanism is provided on the mounting ring 7 and the compression block 18. The unlocking mechanism is used to disengage the positioning rod 19 and the positioning groove 20. The unlocking mechanism includes: a connecting frame 21 slidably mounted on the mounting base 9, one end of the connecting frame 21 being fixedly connected to the compression block 18, and a vertical plate 27 fixedly mounted on the other end of the connecting frame 21; and a mounting frame 22 fixedly mounted on the mounting ring 7, with a sliding rod 23 slidably mounted on the mounting frame 22, and a third... A spring 24 is provided, and a mounting block 25 is fixedly sleeved on the slide rod 23. The mounting block 25 is used to compress the third spring 24. A compression seat 26 is fixedly installed at the bottom of the slide rod 23. The compression seat 26 is used to compress the vertical plate 27. After the vertical plate 27 is compressed, it drives the connecting frame 21 and the positioning rod 19 to move away from the positioning groove 20. A connecting plate 28 is fixedly installed on the compression seat 26. Medical staff can push the compression seat 26 to move and compress the vertical plate 27 through the connecting plate 28.

[0026] In this embodiment, after the entire assembly is used, when the staff needs to separate the needle 6 and syringe 1 using the sharps container, the medical staff places the needle 6, mounting ring 7, and mounting base 9 together into the operating port of the sharps container. Then, the medical staff presses one side of the connecting plate 28 against the inner wall of the operating port of the sharps container, and then pulls the syringe 1 upwards. At this time, the connecting plate 28 is pressed against the inner wall of the sharps container, and the connecting plate 28 drives the squeezing seat 26 to move closer to the mounting bracket 22. At this time, the squeezing seat 26 drives the sliding rod 23 and the mounting block 25 to move, and the mounting block 25 compresses the third spring 24. As the squeezing seat 26 moves, the inclined surface of the squeezing seat 26 squeezes... When the vertical plate 27 is compressed, it drives the connecting frame 21 to move away from the positioning groove 20. At this time, the connecting frame 21 drives the compression block 18 to move, and the compression block 18 compresses the second spring 17. The compression block 18 also drives the positioning rod 19 to move away from the positioning groove 20, thereby disengaging the positioning rod 19 from the positioning groove 20 and freeing the positioning rod 19 from the fixing of the placement block 8. As medical staff continuously pull the syringe 1, the placement block 8 and the placement groove 10 can be separated, and the needle plug 5 and the connecting head 4 can be separated. In this way, medical staff can remove the needle 6 from the syringe 1 without contact, which is convenient for medical staff to carry out treatment.

[0027] In a further preferred embodiment of the present invention, a connecting block 29 is fixedly installed at the bottom of the mounting ring 7, and a connecting groove 30 is provided on the mounting base 9, wherein the connecting groove 30 and the connecting block 29 are adapted to be connected.

[0028] In this embodiment, when the placement block 8 and the placement groove 10 are connected, the connecting block 29 and the connecting groove 30 are connected, which can improve the stability of the connection between the mounting ring 7 and the placement block 8.

[0029] In a further preferred embodiment of the present invention, a needle cap 31 is provided on the needle plug 5, and the needle cap 31 is used to protect the needle tip 6.

[0030] In this embodiment, during the storage, transportation and idle stages of the syringe, the needle cap 31 can completely cover the needle 6 to prevent it from coming into contact with dust, bacteria or sharp objects in the external environment, effectively reducing the risk of cross-infection. At the same time, when medical staff take the syringe, the needle cap 31 serves as an initial protective layer to prevent accidental needle prick injuries.

[0031] In a further preferred embodiment of the present invention, the syringe 1 is provided with a reference scale 32, which medical personnel use to refer to the amount of liquid drawn by the syringe 1.

[0032] In this embodiment, medical staff can intuitively read the volume of liquid drawn or injected into the syringe 1 by observing the value of the reference scale 32 when the piston 2 moves, which facilitates the operation of medical staff.

[0033] In a further preferred embodiment of the present invention, two placement rings 33 are symmetrically fixedly installed on the syringe 1.

[0034] In this embodiment, when medical staff need to push the piston 2 through the lever 3, the medical staff can place their thumb on the end of the lever 3, and their index and middle fingers can be connected to the two placement rings 33, thereby facilitating the medical staff to push the lever 3 and providing convenience for the medical staff.

[0035] In a further preferred embodiment of the present invention, a telescopic rod is provided in the second mounting cavity 16, and the telescopic rod is located inside the second spring 17.

[0036] In this embodiment, the telescopic rod serves as the internal support frame of the second spring 17, which can effectively limit the radial deformation of the second spring 17 during compression and rebound, thereby improving the stability of the second spring 17 during deformation.

[0037] In summary, compared with related technologies, this syringe can effectively prevent the needle 6 from falling off, and the injection operation is highly safe and reliable.

[0038] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A snap-fit ​​anti-dislodgement syringe, characterized in that, include: A syringe, on which a connector is fixedly mounted; A piston is disposed inside the syringe, and a pull rod is fixedly mounted on the piston; A needle plug is fitted onto the connector head, and a needle tip is provided on the needle plug; A mounting ring fixedly installed on the needle plug; A mounting base that is fixedly installed on the connector head; A snap-fit ​​mechanism is fitted onto the mounting ring and the mounting base, the snap-fit ​​mechanism being used to secure the pin to the connector head.

2. The snap-fit ​​anti-dislodgement syringe according to claim 1, characterized in that, The latching mechanism includes: A placement block that is fixedly installed at the bottom of the mounting ring; A placement slot is provided on the mounting base, and the placement block and the placement slot are adapted to be connected. A second mounting cavity is formed on the mounting base, and a second spring is disposed inside the second mounting cavity; A compression block is disposed within the second mounting cavity, the compression block being used to compress the second spring; A positioning rod fixedly installed on the compression block; A positioning groove is formed on the placement block, and the positioning rod extends into the placement groove and is adapted to connect with the positioning groove.

3. The snap-fit ​​anti-dislodgement syringe according to claim 2, characterized in that, The mounting base is provided with a limiting mechanism, which is used to limit the position of the positioning rod. The limiting mechanism includes: A first mounting cavity is formed on the mounting base, and a stop block is provided in the first mounting cavity. The stop block is used to block and limit the end of the positioning rod. A long rod is fixedly installed at the bottom of the stop block, and a first spring is sleeved on the long rod, and the stop block is used to compress the first spring; A vertical rod is fixedly installed on the long rod, the vertical rod is slidably connected to the placement groove, the vertical rod is located below the placement block, and the bottom end of the placement block abuts against the top end of the vertical rod.

4. The snap-fit ​​anti-dislodgement syringe according to claim 2, characterized in that, The mounting ring and the compression block are provided with an unlocking mechanism, which is used to disengage the positioning rod from the positioning groove. The unlocking mechanism includes: A connecting bracket is slidably mounted on the mounting base, one end of the connecting bracket is fixedly connected to the compression block, and a vertical plate is fixedly mounted on the other end of the connecting bracket; A mounting bracket is fixedly installed on the mounting ring. A slide rod is slidably installed on the mounting bracket. A third spring is sleeved on the slide rod, and a mounting block is fixedly sleeved on the slide rod. The mounting block is used to compress the third spring. A pressing seat is fixedly installed at the bottom of the slide bar. The pressing seat is used to press the vertical plate. After the vertical plate is pressed, it drives the connecting frame and the positioning rod to move away from the positioning groove. A connecting plate is fixedly installed on the compression seat. Medical staff can use the connecting plate to push the compression seat to move and compress the vertical plate.

5. The snap-fit ​​anti-dislodgement syringe according to claim 1, characterized in that, A connecting block is fixedly installed at the bottom of the mounting ring, and a connecting groove is provided on the mounting base, the connecting groove and the connecting block being adapted to each other.

6. The snap-fit ​​anti-dislodgement syringe according to claim 1, characterized in that, A needle cap is fitted onto the needle plug to protect the needle tip.

7. The snap-fit ​​anti-dislodgement syringe according to claim 1, characterized in that, The syringe is equipped with a reference scale, which medical personnel use to determine the amount of liquid drawn by the syringe.

8. The snap-fit ​​anti-dislodgement syringe according to claim 1, characterized in that, Two placement rings are symmetrically fixed on the syringe.

9. The snap-fit ​​anti-dislodgement syringe according to claim 2, characterized in that, A telescopic rod is provided inside the second mounting cavity, and the telescopic rod is located inside the second spring.

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