A needle guard against puncture

Abstract

The utility model discloses a kind of anti-puncture needle cover, including mounting seat, mounting seat is equipped with placing cavity, the rear end of mounting seat is equipped with insertion port, the front end of mounting seat is equipped with exit, mounting seat is also equipped with restriction structure, mounting seat is also slidably connected with protective sleeve so that protective sleeve can be slid forward from initial position to protection position, when protective sleeve slides to protection position, protective sleeve front end is stretched forward in the front end of mounting seat to protect syringe needle, mounting seat is equipped with first clamping groove and second clamping groove, protective sleeve is also equipped with when it is located in initial position First clamping groove is clamped, when located in protection position, the elastic buckle of second clamping groove is clamped, medical staff only needs to slide protective sleeve forward from initial position to protection position after injection is completed, needle can be automatically covered. Operation process is intuitive, simple, without complex unlocking or triggering step, reduce the risk of protection failure due to operation failure, improve the reliability of use.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a puncture-proof needle sheath. Background Technology

[0002] In the medical field, syringes are among the most commonly used and indispensable medical devices in clinical practice, widely applied in various scenarios such as drug injection, vaccination, and blood collection. However, after use, the exposed needle of a syringe poses a very high risk of needlestick injury, seriously threatening public health and safety.

[0003] To reduce the risk of needlestick injuries, the use of safety syringes or additional safety devices has been promoted internationally. Existing technologies commonly employ anti-puncture protection solutions, including retractable needle syringes and self-returning needle caps. However, these solutions still have many shortcomings in practical applications.

[0004] For example, some retractable needle syringes have complex structures, high manufacturing costs, and cumbersome operating procedures, which affect the efficiency of clinical use; while some automatic rebound protective sleeves are not reliable enough in terms of triggering mechanism, and there is a risk of rebound failure or premature triggering, which leads to the failure of the protective function.

[0005] To address the aforementioned issues, there is an urgent need to provide a stab-proof needle sheath device that is simple in structure, easy to operate, highly reliable, and reasonably priced.

[0006] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0007] This invention overcomes the shortcomings of the prior art and provides a needle protector that provides rapid and reliable protection for syringe needles after use through ingenious mechanical structure design.

[0008] This utility model is achieved through the following technical solution:

[0009] A puncture-proof needle sheath includes a mounting base with a placement cavity for placing a syringe. The rear end of the mounting base has an insertion port for inserting the syringe into the placement cavity, and the front end of the mounting base has an extension port for the syringe needle to extend out. The mounting base also has a limiting structure for preventing the syringe from exiting the placement cavity. A protective sleeve is slidably connected to the mounting base so that the protective sleeve can slide forward from an initial position to a protected position. When the protective sleeve slides to the protected position, the front part of the protective sleeve extends forward at the front end of the mounting base to protect the syringe needle. The mounting base has a first slot and a second slot. The protective sleeve also has an elastic buckle that engages with the first slot when it is in the initial position and with the second slot when it is in the protected position.

[0010] As described above, in the stab-proof needle sheath, the front sidewall of the first slot and / or the front sidewall of the elastic buckle are provided with a guide surface to facilitate the elastic buckle's exit from the first slot, and the guide surface includes an inclined surface or an arc-shaped surface.

[0011] As described above, in the anti-stab needle sheath, the rear side of the elastic buckle is provided with a limiting structure that can abut against the inner wall of the second slot to restrict the protective sheath from resetting backward.

[0012] As described above, the stab-proof needle sheath includes a limiting structure comprising a supporting plane located on the rear side of the elastic buckle.

[0013] As described above, the stab-proof needle sheath includes a retaining structure located at the rear end of the mounting base, wherein the retaining structure is provided with a snap-fit ​​structure that can engage with the syringe barrel flange.

[0014] As described above, in a stab-proof needle sheath, the mounting base is provided with a first observation port communicating with the placement cavity, and the protective sleeve is provided with a second observation port communicating with the first observation port.

[0015] As described above, in a puncture-proof needle sheath, the mounting base is provided with a stop that extends into the first observation port to assist in fixing the syringe.

[0016] In the stab-proof needle sheath described above, the second slot is located on the stop block.

[0017] As described above, a stab-proof needle sheath has a through hole at the front end that allows a syringe needle to pass through.

[0018] As described above, a stab-proof needle sheath has a protrusion on its outer side wall that allows it to be pulled out by hand and slid along the mounting base.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention employs a sliding protective sleeve design. After injection, medical personnel simply slide the protective sleeve from its initial position to the protected position, which automatically covers the needle. The operation is intuitive and simple, requiring no complicated unlocking or triggering steps, reducing the risk of protection failure due to operational errors and improving reliability.

[0021] The mounting base has a first and a second locking slot, and the protective sleeve has an elastic buckle, forming an effective double-locking structure. When the protective sleeve is in the initial position, the elastic buckle engages with the first locking slot to ensure stability during the injection process and prevent the protective sleeve from accidentally sliding. When the injection is completed and the protective sleeve is slid to the protected position, the elastic buckle automatically engages with the second locking slot, firmly locking the protective sleeve in the needle protection state, effectively preventing the needle from being exposed again and providing a reliable physical barrier.

[0022] The limiting structure on the mounting base effectively prevents the syringe inserted into the placement cavity from accidentally exiting during use or handling, ensuring that the syringe remains stable inside the needle sheath, thus guaranteeing the safety of the injection operation and the smooth execution of subsequent protective actions.

[0023] The entire device is based on a mounting base and integrates a placement chamber, a restraining structure, and a sliding protective sleeve, featuring a compact and rational structural design. It can be used as a standalone accessory for standard syringes or easily integrated into specific syringe products, exhibiting excellent versatility and adaptability. Attached Figure Description

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0027] Figure 3 This is an exploded view of the present invention;

[0028] Figure 4 This is a schematic diagram of the mounting base in this utility model;

[0029] Figure 5 This is a schematic diagram of the protective sleeve of this utility model in the protected position;

[0030] Figure 6 This is a schematic diagram of a syringe.

[0031] Figure 7 This is a schematic diagram of a syringe mounted on a puncture-proof needle sheath with the sheath in its initial position. Figure 1 ;

[0032] Figure 8 This is a schematic diagram of a syringe mounted on a puncture-proof needle sheath with the sheath in its initial position. Figure 2 ;

[0033] Figure 9 This is a schematic diagram of a syringe mounted on a puncture-proof needle sheath with the sheath in a protective position. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings:

[0035] like Figure 6As shown, a typical commercially available syringe generally includes a syringe barrel 91, inside which a piston that can move back and forth is slidably connected. A plunger 92 is connected behind the piston, and the tail of the plunger 92 has a finger rest 93 for easy pressing. At the very front of the syringe barrel 91 is a slender metal needle 94, covered by a needle sheath 95. The rear outer side of the syringe barrel 91 has a flange 911 for easy gripping.

[0036] like Figures 1 to 9 The illustrated anti-puncture needle sheath includes a mounting base 1, which has a placement cavity 2 for placing a syringe. The rear end of the mounting base 1 has an insertion port 11 for inserting the syringe into the placement cavity 2, and the front end of the mounting base 1 has an extension port 12 for the syringe needle 94 to extend out. The mounting base 1 also has a limiting structure 3 for preventing the syringe from exiting the placement cavity 2. A protective sleeve 4 is slidably connected to the mounting base 1, allowing the protective sleeve 4 to slide forward from an initial position to a protected position. When the protective sleeve 4 slides to the protected position, its front part extends forward at the front end of the mounting base 1 to protect the syringe needle 94. The mounting base 1 has a first locking groove 5 and a second locking groove 6. The protective sleeve 4 also has an elastic buckle 7 that engages with the first locking groove 5 when in the initial position and with the second locking groove 6 when in the protected position. The front end of the protective sleeve 4 has a through hole 400 through which the syringe needle 94 can pass.

[0037] This utility model provides a double locking structure by setting a sliding protective sleeve 4 with an elastic buckle 7 on the mounting base 1: the protective sleeve 4 is initially fixed by the elastic buckle 7 into the first slot 5, and after the injection is completed, it slides forward to the protective position, and the elastic buckle 7 automatically engages into the second slot 6, firmly locking and covering the needle 94 to prevent accidental exposure; the limiting structure 3 on the mounting base 1 ensures that the syringe is stable and does not come out. The overall design can be used as an independent accessory to adapt to standard syringes, and is also easy to integrate, with good safety and versatility.

[0038] Specifically, the first slot 5 and the second slot 6 are spaced apart along the front and rear direction of the mounting base 1. The distance between the first slot 5 and the second slot 6 is designed according to the actual size of the syringe to ensure that the protective sleeve 4 can cover the needle 94 after sliding from the initial position to the protective position.

[0039] Furthermore, the front sidewall of the first slot 5 and / or the front sidewall of the elastic buckle 7 are provided with a guide surface 8 to facilitate the elastic buckle 7 exiting the first slot 5. The guide surface 8 includes an inclined surface or an arc-shaped surface.

[0040] When the protective sleeve 4 is slid into the protective position by external force, the guide surface 8 guides this external force to generate a component force that pushes the elastic buckle 7 outward to undergo elastic deformation, thereby helping the elastic buckle 7 to disengage from the first slot 5. Without the guide surface 8, forcibly sliding the protective sleeve 4 may cause the elastic buckle 7 to be damaged due to improper force. The guide surface 8 guides the direction of the force, making the deformation of the elastic buckle 7 more controllable and more in line with its designed deformation path, thereby reducing the risk of damage during disassembly.

[0041] Furthermore, the rear side of the elastic buckle 7 is provided with a limiting structure 71 that abuts against the inner wall of the second slot 6, thereby restricting the protective sleeve 4 from resetting backward. Specifically, the limiting structure 71 can be a support plane located on the rear side of the elastic buckle 7. The limiting structure 71 locks the protective sleeve 4 in the protected position, preventing it from resetting to its initial position. When the elastic buckle 7 exits from the first slot 5 and enters or slides into the second slot 6, the limiting structure 71 on its rear side abuts against the rear inner wall of the second slot 6. This abutment forms a physical stop, preventing the protective sleeve 4 from moving backward due to its own elasticity or other external forces, thereby ensuring that the protective state is reliably maintained.

[0042] In one embodiment, the limiting structure 3 includes a retainer 31 located at the rear end of the mounting base 1. The retainer 31 has a latching structure 32 that engages with the syringe flange 911. The latching structure 32 allows for quick and easy fixation of the syringe to the mounting base 1. By aligning the syringe flange 911 with the latching structure 32 and pushing it in, the latching structure 32 automatically engages the flange 911, completing the installation. The installation method is simple and requires no additional tools or complicated steps. The engagement between the latching structure 32 and the flange 911 provides a reliable mechanical lock, ensuring that the syringe will not easily loosen or fall off during use, thus guaranteeing operational safety and stability.

[0043] In one embodiment, the sidewall of the placement cavity 2 is arc-shaped, so that the outer sidewall of the syringe 91 can fit against the sidewall of the placement cavity 2, thereby reducing the shaking of the syringe.

[0044] In one embodiment, the mounting base 1 is provided with a first observation port 10 communicating with the placement cavity 2, and the protective sleeve 4 is provided with a second observation port 40 communicating with the first observation port 10. This allows the user to directly observe the internal state of the placement cavity 2 without opening or pushing the protective sleeve 4. This enables the user to easily view key information such as the remaining medication level in the syringe, the presence of air bubbles, changes in liquid color, and the position of the syringe piston, which is crucial for accurate drug administration and safety monitoring. It also reduces the overall weight of the puncture-proof needle sheath. When the protective sleeve 4 is in the protected position, the second observation port 40 corresponds to the position of the needle 94.

[0045] Furthermore, the mounting base 1 is provided with a stop 13 that extends into the first observation port 10 to assist in fixing the syringe. This provides additional radial constraint, thereby reducing syringe wobbling. At the same time, the stop 13 also serves as a support point for the syringe, helping to distribute the injection force more evenly on the mounting base 1 and reducing the local load on the snap-fit ​​structure 32 and the syringe flange 911.

[0046] Furthermore, the second slot 6 is located on the stop block 13, thereby making the overall structure more compact.

[0047] Furthermore, the outer wall of the protective sleeve 4 is provided with a protrusion 41 that allows it to be slid along the mounting base 1 by hand.

[0048] In one embodiment, the protective sleeve 4 and the elastic buckle 7 are an integral structure. The mounting base 1 and the limiting structure 3 are an integral structure.

Claims

1. A stab-proof needle sheath, characterized in that: The device includes a mounting base (1), which has a placement cavity (2) for placing a syringe. The rear end of the mounting base (1) has an insertion port (11) for inserting the syringe into the placement cavity (2), and the front end of the mounting base (1) has an extension port (12) for the syringe needle to extend out. The mounting base (1) also has a limiting structure (3) for restricting the syringe from exiting the placement cavity (2). A protective sleeve (4) is slidably connected to the mounting base (1) so that the protective sleeve (4) can slide forward from the initial position to the protective position. When the protective sleeve (4) slides to the protective position, the front part of the protective sleeve (4) extends forward at the front end of the mounting base (1) to protect the syringe needle. The mounting base (1) has a first slot (5) and a second slot (6). The protective sleeve (4) also has an elastic buckle (7) that engages with the first slot (5) when it is in the initial position and engages with the second slot (6) when it is in the protective position.

2. The anti-stab needle sheath according to claim 1, characterized in that: The front sidewall of the first slot (5) and / or the front sidewall of the elastic buckle (7) are provided with a guide surface (8) to facilitate the elastic buckle (7) to exit the first slot (5), and the guide surface (8) includes an inclined surface or an arc-shaped surface.

3. The anti-stab needle sheath according to claim 2, characterized in that: The elastic buckle (7) has a limiting structure (71) on its rear side that can abut against the inner wall of the second slot (6) to limit the protective sleeve (4) from resetting backward.

4. The anti-stab needle sheath according to claim 3, characterized in that: The limiting structure (71) includes a support plane located on the rear side of the elastic buckle (7).

5. A stab-proof needle sheath according to claim 3, characterized in that: The limiting structure (3) includes a retainer (31) located at the rear end of the mounting base (1), and the retainer (31) is provided with a snap-fit ​​structure (32) that can engage with the syringe barrel flange.

6. A stab-proof needle sheath according to claim 5, characterized in that: The mounting base (1) is provided with a first observation port (10) that communicates with the placement cavity (2), and the protective sleeve (4) is provided with a second observation port (40) that communicates with the first observation port (10).

7. A stab-proof needle sheath according to claim 6, characterized in that: The mounting base (1) is provided with a stop (13) that extends into the first observation port (10) to help fix the syringe.

8. The stab-proof needle sheath according to claim 7, characterized in that: The second slot (6) is located on the stop block (13).

9. A stab-proof needle sheath according to any one of claims 1-8, characterized in that: The front end of the protective sleeve (4) is provided with a through hole (400) through which the syringe needle can pass.

10. A stab-proof needle sheath according to any one of claims 1-8, characterized in that: The outer wall of the protective sleeve (4) is provided with a protrusion (41) that allows it to slide along the mounting base (1) by hand.

Images