Self-locking type spring safety needle

Abstract

The utility model relates to the technical field of safety needles, and provides a self-locking type spring safety needle which comprises a shell, a first fixing block fixedly arranged on the shell, a needle head fixedly arranged in the first fixing block, second fixing blocks fixedly arranged on the two sides of the interior of the shell, and a connecting structure arranged on the top of the interior of the shell. A sliding sleeve is arranged in the shell in a sliding mode, a protruding block is fixedly arranged at the top of the interior of the sliding sleeve, a spring is arranged on the outer side of the protruding block in a sleeving mode, during use, the spring deforms, then the second connector is placed at the position where injection is needed, the second connector is squeezed, and therefore the second connector slides, the needle head leaks out, and injection is conducted; when the connecting structure is loosened, the deformed spring can push the sliding sleeve to slide, the second fixing block is clamped out of the position between the elastic plate and the second limiting plate, meanwhile, the supporting arm and the baffle are located at the bottom of the sliding sleeve, the needle head is locked, then the outer side of the shell is covered with the protective cover, and secondary popping is prevented.

Description

Technical Field

[0001] This utility model relates to the field of safety needle technology, specifically to a self-locking spring safety needle. Background Technology

[0002] A safety needle is a disposable injection needle with added safety protection. In clinical practice, needlestick injuries are frequent and serious, causing not only trauma and pain but also potential viral infections such as HIV, hepatitis B, and hepatitis C. Using a safety needle effectively prevents needlestick injuries to healthcare workers and other personnel involved in subsequent procedures. Safety needles are suitable for use in hospitals, clinics, and other medical settings, as well as for patients who need to self-inject, such as those using safety needles for insulin pens for diabetic patients. They protect both healthcare workers and patients from needlestick injuries and infection risks. However, some existing safety needles have insufficient locking reliability in their safety protection structures. During subsequent waste sorting and transportation, external impacts can easily cause the retracted or concealed needle to pop out unexpectedly, leading to accidental needlesticking. Therefore, this invention proposes a self-locking spring safety needle. Utility Model Content

[0003] This invention proposes a self-locking spring safety needle, which solves the problem that some safety needles in related technologies have insufficient locking reliability in their safety protection structure. In subsequent waste sorting and transportation processes, the needle, which has been retracted or covered, is easily ejected due to external impact, leading to accidental puncture incidents.

[0004] The technical solution of this utility model is as follows: A self-locking spring safety pin includes a housing, a first fixing block fixedly disposed inside the housing, a needle fixedly disposed inside the first fixing block, second fixing blocks fixedly disposed on both sides of the housing, a connecting structure disposed at the top of the housing, a sliding sleeve slidably disposed inside the housing, a spring contacting the inside of the sliding sleeve, a guide structure disposed on the outside of the sliding sleeve, a second connector slidably disposed inside the bottom of the housing, at least two support arms fixedly disposed on the top of the second connector, a support plate fixedly disposed on one side of each support arm, one end of the spring being located on the top of at least two support plates, a baffle fixedly disposed on the other side of each support arm, and a protective cover covering the outside of the housing.

[0005] Preferably, guide grooves are provided on both sides of the inner side of the sliding sleeve, and the baffle is slidably installed inside the guide grooves.

[0006] Preferably, the guide structure includes two first limiting plates, the first limiting plates are fixedly installed inside the sliding sleeve, the sliding sleeve is fixedly provided with two elastic plates, one end of each elastic plate is fixedly provided with a guide plate, and one side of each elastic plate is fixedly provided with a second limiting plate.

[0007] Preferably, the sliding sleeve, the first limiting plate, the elastic plate, the guide plate, and the second limiting plate form a sliding groove, and the second fixing block is slidably installed inside the sliding groove.

[0008] Preferably, the connecting structure includes a connecting cylinder, which is installed inside the top of the outer shell. Multiple limiting blocks are fixedly arranged on the outer side of the connecting cylinder and the limiting blocks are fastened to the inner wall of the outer shell. The connecting cylinder is machined with internal threads.

[0009] Preferably, the inner wall of the outer shell is provided with multiple fastening grooves, and the size of the limiting block is adapted to the fastening grooves.

[0010] The beneficial effects of this utility model are as follows:

[0011] This invention incorporates a sliding sleeve, a protruding block, a spring, a first limiting plate, and an elastic plate. During use, the rotating connecting structure pushes the outer shell downwards, causing the sliding sleeve to slide downwards. Simultaneously, the spring deforms, compressing the second connector, causing it to slide and allowing the needle to protrude for injection. After injection, the connecting structure is released, and the deformed spring pushes the sliding sleeve to slide, causing the second fixing block to engage between the elastic plate and the second limiting plate. Meanwhile, the support arm and baffle are positioned at the bottom of the sliding sleeve, locking the needle in place. Finally, a protective cover is placed over the outer shell to prevent secondary ejection. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a perspective view of the entire utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure between the bracket and the outer shell of this utility model;

[0015] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 4 This is a schematic diagram of the connection structure between the sliding sleeve and the second connector of this utility model;

[0017] Figure 5 This is a schematic diagram of the guiding structure of this utility model;

[0018] Figure 6 This is a schematic diagram of the structure in the final state of this utility model;

[0019] Figure 7 This is a schematic diagram of the connection structure between the sliding sleeve and the outer shell of this utility model.

[0020] In the diagram: 1. Outer shell; 2. First fixing block; 3. Needle; 4. Second fixing block; 5. Connecting cylinder; 6. Limiting block; 7. Internal thread; 8. Bracket; 9. First connector; 10. Sliding sleeve; 11. Protrusion; 12. Spring; 13. First limiting plate; 14. Elastic plate; 15. Guide plate; 16. Second limiting plate; 17. Second connector; 18. Support arm; 19. Support plate; 20. Baffle; 21. Protective cover. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0022] Example 1

[0023] like Figures 1-7 As shown, this embodiment proposes a self-locking spring safety pin, including a housing 1. A first fixing block 2 is fixedly disposed inside the housing 1, and a needle 3 is fixedly disposed inside the first fixing block 2. Second fixing blocks 4 are fixedly disposed on both sides of the inside of the housing 1. A connecting structure is provided at the top of the inside of the housing 1. A sliding sleeve 10 is slidably disposed inside the housing 1, with a spring 12 inside the sliding sleeve 10. A guide structure is provided on the outer side of the sliding sleeve 10. A second connector 17 is slidably disposed inside the bottom of the housing 1. At least two support arms 18 are fixedly disposed on the top of the second connector 17. A support plate 19 is fixedly disposed on one side of each support arm 18. One end of the spring 12 is located on the top of at least two support plates 19. On the other side of 18, baffles 20 are fixedly installed. The outer side of the outer shell 1 is covered with a protective cover 21. In use, by rotating the connecting structure, the sliding sleeve 10 is pushed downward, and the spring 12 deforms. Then, the second connector 17 is placed at the position to be injected. The second connector 17 is squeezed, so that the second connector 17 slides, allowing the needle 3 to be exposed for injection. After the injection is completed, the connecting structure is released, and the deformed spring 12 pushes the sliding sleeve 10 to slide, so that the second fixing block 4 is locked between the elastic plate 14 and the second limiting plate 16. At the same time, the support arm 18 and the baffle 20 are at the bottom of the sliding sleeve 10, thereby locking the needle 3. Then, the protective cover 21 is placed on the outer side of the outer shell 1 to prevent secondary ejection.

[0024] Guide grooves are provided on both sides of the inner side of the sliding sleeve 10. The baffle 20 is slidably installed inside the guide groove, and the support arm 18 is slidably installed inside the sliding sleeve 10 through the baffle 20.

[0025] The guide structure includes two first limiting plates 13, which are fixedly installed inside the sliding sleeve 10. Two elastic plates 14 are fixedly installed inside the sliding sleeve 10. A guide plate 15 is fixedly installed at one end of each elastic plate 14, and a second limiting plate 16 is fixedly installed on one side of each elastic plate 14. The second fixed block 4 is limited and guided by the first limiting plates 13 and the second limiting plates 16.

[0026] The sliding sleeve 10, the first limiting plate 13, the elastic plate 14, the guide plate 15 and the second limiting plate 16 form a sliding groove, and the second fixing block 4 is slidably installed inside the sliding groove, so that the sliding sleeve 10 moves along the track.

[0027] In this embodiment, before use, the outer cover 21 of the outer shell 1 is removed, the connecting structure is rotated, and the sliding sleeve 10 is pushed down along the inner wall of the outer shell 1. At this time, the second fixing blocks 4 fixed on both sides inside the outer shell 1 slide along the groove formed by the sliding sleeve 10, the first limiting plate 13, the elastic plate 14, the guide plate 15, and the second limiting plate 16, restricting the sliding direction of the sliding sleeve 10; then, the second connector 17 is positioned appropriately, the second connector 17 is squeezed, and the support arm 18 is slid inside the sliding sleeve 10 through the baffle 20, so that the second connector 17 slides upward, thereby allowing the needle 3 to fully extend from the bottom of the outer shell 1, and the injection operation can be performed.

[0028] After injection, the connecting structure is released, and the pre-compressed spring 12 on the outside of the protrusion 11 releases its elastic force, pushing the protrusion 11 and the sliding sleeve 10 fixed thereto upward, causing the sliding sleeve 10 to slide upward along the inner wall of the outer shell 1. When the sliding sleeve 10 slides upward to its limit position, the second fixing blocks 4 on both sides inside the outer shell 1 engage between the elastic plate 14 and the second limiting plate 16 of the guide structure of the sliding sleeve 10. The elastic plate 14 uses its own elastic deformation to limit the second fixing block 4 in the groove, preventing the sliding sleeve 10 from sliding in the opposite direction, thus locking the needle 3. At the same time, the support arm 18 is located at the bottom of the sliding sleeve 10, restricting the axial movement of the sliding sleeve 10 through the support arm 18. Finally, the removed protective cover 21 is put back on the outside of the outer shell 1 to further isolate the needle 3 and completely eliminate the risk of secondary needle ejection and accidental puncture.

[0029] Example 2

[0030] like Figures 1-3 and Figure 5As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes that the connecting structure includes a connecting cylinder 5, which is installed inside the top of the outer shell 1. Multiple limiting blocks 6 are fixedly provided on the outer side of the connecting cylinder 5, and the limiting blocks 6 are fastened to the inner wall of the outer shell 1. The connecting cylinder 5 has internal threads 7. In use, the connecting cylinder 5 is installed inside the outer shell 1, and the limiting blocks 6 on the outer side of the connecting cylinder 5 are fastened to the inner wall of the outer shell 1, thereby limiting the connecting cylinder 5. Then, the bracket 8 is installed on the top of the outer shell 1, and the first connecting head 9 at the bottom of the bracket 8 is threadedly connected to the inside of the connecting cylinder 5, thereby installing and fixing the bracket 8.

[0031] The inner wall of the outer shell 1 is provided with multiple buckle grooves. The size of the limiting block 6 is adapted to the buckle grooves, and the connecting cylinder 5 is installed inside the outer shell 1 through the limiting block 6.

[0032] In this embodiment, the connecting cylinder 5 is first installed inside the top of the outer shell 1, and the multiple limiting blocks 6 on the outside of the connecting cylinder 5 are correspondingly snapped into the pre-set grooves on the inner wall of the outer shell 1 to fix the connecting cylinder 5 to the outer shell 1; then the first connecting head 9 at the bottom of the bracket 8 is aligned with the internal thread 7 inside the connecting cylinder 5, and the connection between the bracket 8 and the connecting cylinder 5 is completed by screwing the threads together, providing a stable interface for subsequent adapter syringes or injection pens.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

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