Self-fixating syringe needle

Abstract

The application belongs to the technical field of medical devices, and discloses a self-fixing syringe needle, which comprises a needle seat, a puncture needle fixed to the needle seat, an end of the puncture needle away from the tip of the puncture needle being closed and extending into the needle seat, a plurality of communication holes being formed in the side wall of the puncture needle in the needle seat, a hydraulic opening and closing assembly being slidably connected in the needle seat and detachably connected with the plurality of communication holes, and a plurality of accommodating grooves being circumferentially formed on the outer side wall of the puncture needle close to the tip of the puncture needle, a spreading rod being rotatably connected in the accommodating groove through a rotating shaft, and a transmission assembly being connected between the spreading rod and the hydraulic opening and closing assembly. The self-fixing syringe needle can automatically lock the puncture needle in a specific tissue, improve the stability of the needle fixation, and prevent the puncture needle from moving due to the injection of medicine. In addition, the hand originally used to fix the puncture needle can be released, the hand can assist the injection of the medicine by the syringe, the operator does not need to use too much effort to stabilize the needle, and the operation is convenient.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a self-fixing syringe needle. Background Technology

[0002] Injecting medications into tissues and around nerves is one of the common treatment methods. Examples include soft tissue blocks, peripheral nerve blocks, and peripheral nerve block anesthesia.

[0003] The current method of injection puncture involves finding a specific injection point, then the operator needs to hold the syringe or needle with one hand to prevent the needle from moving, while using the other hand to push the syringe to inject the medication. The disadvantage is that the operator's one hand is unstable in holding the syringe or needle, which may cause the injection point to shift during the injection process. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a self-fixing syringe needle, aiming to solve or improve upon these technical issues.

[0005] To achieve the above objectives, the present invention provides a self-locking syringe needle, comprising:

[0006] A needle hub is fixedly connected to a puncture needle. The end of the puncture needle away from its tip is closed and extends into the needle hub. Several connecting holes are provided on the side wall of a section of the puncture needle located inside the needle hub.

[0007] A hydraulic opening and closing assembly is slidably connected inside the needle seat and detachably connected to a plurality of the communicating holes;

[0008] A plurality of receiving grooves are provided, the plurality of receiving grooves being circumferentially formed on the outer side wall of the puncture needle near its tip. An expansion rod is rotatably connected to the receiving groove via a rotating shaft, and a transmission component is connected between the expansion rod and the hydraulic opening and closing assembly.

[0009] Optionally, the hydraulic opening and closing assembly includes a sliding sleeve, with a plurality of first springs fixedly connected between the sliding sleeve and the inner end wall of the needle seat near the puncture needle, the inner wall of the sliding sleeve being in a sealing sliding fit with the outer wall of the puncture needle, the inner wall of the sliding sleeve being detachably connected to a plurality of the communicating holes, and the end of the transmission assembly away from the expansion rod being connected to the sliding sleeve.

[0010] Optionally, the transmission assembly includes a connecting groove formed in the side wall of the puncture needle. One end of the connecting groove is connected to the receiving groove, and the other end is connected to a sliding groove. The sliding groove is located inside the needle seat and communicates with the inner cavity of the needle seat. A transmission rod is slidably connected in the connecting groove. One end of the transmission rod extends into the receiving groove and is hinged to the expansion rod. A connecting rod is slidably connected in the sliding groove. One end of the connecting rod is fixedly connected to the transmission rod, and the other end is fixedly connected to the sliding sleeve.

[0011] Optionally, the expansion rod is hollow inside, and a support plate is fixedly connected inside the expansion rod. A sliding rod is slidably connected through the support plate. A spike is fixedly connected to one end of the sliding rod away from the rotating shaft. The other end of the sliding rod away from the spike extends out of the sliding rod and is detachably connected to a compression assembly. A second spring is sleeved on the outer wall of the sliding rod, and the second spring is fixed between the sliding rod and the support plate.

[0012] Optionally, the compression assembly includes a groove formed on the bottom surface of the receiving groove. An air bladder is provided in the groove. The air bladder is detachably connected to the sliding rod. The inflatable end of the air bladder is fixedly connected to and communicates with a connecting tube. The connecting tube is fixedly connected to the side wall of the puncture needle, and the end of the connecting tube away from the air bladder extends into the inner cavity of the puncture needle. The end of the connecting tube away from the air bladder is fixedly connected to and communicates with a compression tube. One end of the compression tube is open and faces the needle seat. A pressure rod is slidably connected inside the compression tube. One end of the pressure rod extends out of the compression tube, and a third spring is fixedly connected between the other end of the pressure rod and the closed end of the compression tube.

[0013] Optionally, two flexible sealing strips are provided at the top opening of the receiving groove. The opposite sides of the two flexible sealing strips are fixed to the receiving groove. The two flexible sealing strips cover the expansion rod, and the opposite sides of the two flexible sealing strips are in contact and can be opened and closed.

[0014] Optionally, the outer wall of the sliding sleeve and the inner wall of the needle seat are in a sealing sliding fit.

[0015] Optionally, the expansion rod is made of rigid plastic.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects:

[0017] By connecting the needle hub to the syringe, and then inserting the puncture needle into the tissue, during injection, the hydraulic pressure causes the medication to push the hydraulic opening and closing component, automatically exposing the connecting hole and allowing the medication to flow. As the hydraulic opening and closing component moves, the transmission component synchronously drives the expansion rods to unfold along the rotating shaft, forming an umbrella-shaped support structure that automatically locks the puncture needle within the specific tissue. After injection, a slight aspiration of the syringe creates negative pressure, reducing the pressure on the hydraulic opening and closing component and causing it to reset. This allows the expansion rods to retract into their receiving grooves, facilitating the removal of the puncture needle from the tissue. This invention improves the stability of the needle fixation, preventing movement during medication injection. Furthermore, it frees up the hand that was originally fixing the puncture needle, allowing the operator to assist in pushing the syringe to inject the medication, reducing the need for excessive effort from stabilizing the needle and simplifying the operation. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the needle seat of the present invention;

[0021] Figure 3 This is a cross-sectional view of the puncture needle of the present invention;

[0022] Figure 4 for Figure 3 A magnified view of part A in the image;

[0023] Figure 5 for Figure 3 A magnified view of part B in the image.

[0024] In the diagram: 1. Needle base; 2. Puncture needle; 3. Connecting hole; 4. Receiving groove; 5. Rotating shaft; 6. Expansion rod; 7. Sliding sleeve; 8. First spring; 9. Connecting groove; 10. Sliding groove; 11. Transmission rod; 12. Hinge rod; 13. Connecting rod; 14. Support plate; 15. Sliding rod; 16. Spike; 17. Second spring; 18. Groove; 19. Airbag; 20. Connecting tube; 21. Squeezing tube; 22. Pressure rod; 23. Third spring; 24. Flexible sealing strip. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1-5 As shown, this embodiment provides a self-locking syringe needle, comprising:

[0028] A needle holder 1 is fixedly connected to a puncture needle 2. The end of the puncture needle 2 away from its tip is closed and extends into the needle holder 1. Several connecting holes 3 are opened on the side wall of a section of the puncture needle 2 located in the needle holder 1.

[0029] A hydraulic opening and closing assembly is slidably connected inside the needle seat 1 and detachably connected to several communicating holes 3.

[0030] Several receiving grooves 4 are circumferentially formed on the outer wall of the puncture needle 2 near its tip. An expansion rod 6 is rotatably connected to the receiving groove 4 via a rotating shaft 5. A transmission component is connected between the expansion rod 6 and the hydraulic opening and closing assembly.

[0031] By connecting the needle hub 1 to the syringe, and then inserting the puncture needle 2 into the tissue, during injection, the hydraulic pressure causes the medication to push the hydraulic opening and closing assembly, automatically exposing the connecting hole 3 and allowing the medication to flow. As the hydraulic opening and closing assembly moves, the transmission assembly synchronously drives the expansion rod 6 to unfold along the rotating shaft 5, forming an umbrella-shaped support structure from multiple expansion rods 6. This automatically locks the puncture needle 2 within the specific tissue. After injection, a slight aspiration of the syringe creates negative pressure, reducing the pressure on the hydraulic opening and closing assembly and causing it to reset. This allows the expansion rod 6 to retract into the receiving groove 4, facilitating the removal of the puncture needle 2 from the tissue. This improves the stability of the needle fixation, preventing movement during medication injection. Furthermore, it frees up the hand that was originally fixing the puncture needle 2, allowing the operator to assist in pushing the syringe to inject the medication. This reduces the need for the operator to exert excessive effort to stabilize the needle, simplifying the operation.

[0032] After the injection is completed, the hydraulic opening and closing assembly loses pressure and resets, causing the expansion rod 6 to retract into the receiving groove 4, thus avoiding the situation where it breaks and remains in the tissue during withdrawal.

[0033] The scheme is further optimized. The hydraulic opening and closing component includes a sliding sleeve 7. Multiple first springs 8 are fixed between the sliding sleeve 7 and the inner end wall of the needle seat 1 near the puncture needle 2. The inner wall of the sliding sleeve 7 is in a sealed sliding fit with the outer wall of the puncture needle 2. The inner wall of the sliding sleeve 7 is detachably connected to several connecting holes 3. The end of the transmission component away from the expansion rod 6 is connected to the sliding sleeve 7.

[0034] Further optimization of the scheme: the transmission component includes a connecting groove 9, which is opened in the side wall of the puncture needle 2. One end of the connecting groove 9 is connected to the receiving groove 4, and the other end is connected to a sliding groove 10. The sliding groove 10 is located in the needle seat 1 and is connected to the inner cavity of the needle seat 1. A transmission rod 11 is slidably connected in the connecting groove 9. One end of the transmission rod 11 extends into the receiving groove 4 and is hinged to the expansion rod 6 with a hinge rod 12. A connecting rod 13 is slidably connected in the sliding groove 10. One end of the connecting rod 13 is fixedly connected to the transmission rod 11, and the other end is fixedly connected to the sliding sleeve 7.

[0035] Hydraulic pressure can be used to push the sliding sleeve 7 to achieve misalignment between the sliding sleeve 7 and the connecting hole 3, so that the needle seat 1 and the puncture needle 2 are connected. At the same time, the sliding sleeve 7 pushes the transmission rod 11 synchronously, and the sliding groove 10 and the connecting rod 13 guide and limit it. Thus, the transmission rod 11 pushes the hinge rod 12, and the hinge rod 12 pushes the expansion rod 6 to unfold. Conversely, when the sliding sleeve 7 loses hydraulic pressure, the first spring 8 can push the sliding sleeve 7 to reset, and the expansion rod 6 resets synchronously.

[0036] The design is further optimized by having a hollow interior expansion rod 6, with a support plate 14 fixedly connected inside the expansion rod 6. A sliding rod 15 is slidably connected through the support plate 14. A spike 16 is fixedly connected to one end of the sliding rod 15 away from the rotating shaft 5. The other end of the sliding rod 15 away from the spike 16 extends out of the sliding rod 15 and is detachably connected to a compression assembly. A second spring 17 is sleeved on the outer wall of the sliding rod 15 and is fixedly connected between the sliding rod 15 and the support plate 14.

[0037] Further optimization of the scheme: the compression assembly includes a groove 18, which is formed on the bottom surface of the receiving groove 4. An airbag 19 is provided in the groove 18. The airbag 19 is detachably connected to the sliding rod 15. The inflatable end of the airbag 19 is fixedly connected to and connected to a connecting tube 20. The connecting tube 20 is fixedly connected to the side wall of the puncture needle 2. The end of the connecting tube 20 away from the airbag 19 extends into the inner cavity of the puncture needle 2. The end of the connecting tube 20 away from the airbag 19 is fixedly connected to and connected to a compression tube 21. One end of the compression tube 21 is open and faces the needle seat 1. A pressure rod 22 is slidably connected inside the compression tube 21. One end of the pressure rod 22 extends out of the compression tube 21. A third spring 23 is fixedly connected between the other end of the pressure rod 22 and the closed end of the compression tube 21.

[0038] After the dilator 6 is fully extended, the sliding rod 15 corresponds vertically to the air bladder 19. Liquid enters the puncture needle 2 through the connecting hole 3, and through the hydraulic action, the liquid pushes the pressure rod 22, causing the pressure rod 22 to gradually squeeze the air in the squeezing tube 21. This air then enters the air bladder 19 through the connecting tube 20, and the air bladder 19 squeezes the sliding rod 15, causing the sliding rod 15 to push the spike 16 slightly into the tissue, thereby further improving the stability of the dilator 6. Conversely, after the injection is completed, the pressure rod 22 first loses hydraulic pressure, and the third spring 23 pushes the pressure rod 22 to reset, causing the air bladder 19 to contract. Then, the second spring 17 pushes the sliding rod 15, causing the spike 16 to retract into the dilator 6.

[0039] The design is further optimized by providing two flexible sealing strips 24 at the top opening of the receiving groove 4. The opposite sides of the two flexible sealing strips 24 are fixed to the receiving groove 4. The two flexible sealing strips 24 cover the expansion rod 6, and the opposite sides of the two flexible sealing strips 24 are in contact and can be opened and closed.

[0040] By setting a flexible sealing strip 24, tissue can be isolated during insertion, and the flexible sealing strip 24 can be automatically opened when the expansion rod 6 is deployed.

[0041] The design was further optimized so that the outer wall of the sliding sleeve 7 and the inner wall of the needle seat 1 are in a sealed sliding fit to improve the hydraulic pushing effect.

[0042] The design was further optimized by making expansion rod 6 a rigid plastic material, thus giving it a certain level of strength.

[0043] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 this invention.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A self-locking syringe needle, characterized in that, include: A needle seat (1) is fixedly connected to a puncture needle (2). The end of the puncture needle (2) away from its tip is closed and extends into the needle seat (1). Several connecting holes (3) are provided on the side wall of a section of the puncture needle (2) located in the needle seat (1). A hydraulic opening and closing assembly is slidably connected inside the needle seat (1) and detachably connected to a plurality of the communicating holes (3); A plurality of receiving grooves (4) are circumferentially formed on the outer side wall of the puncture needle (2) near its tip. An expansion rod (6) is rotatably connected to the receiving groove (4) via a rotating shaft (5). A transmission component is connected between the expansion rod (6) and the hydraulic opening and closing assembly.

2. The self-fixing syringe needle according to claim 1, characterized in that: The hydraulic opening and closing assembly includes a sliding sleeve (7), and a plurality of first springs (8) are fixedly connected between the sliding sleeve (7) and the inner end wall of the needle seat (1) near the puncture needle (2). The inner wall of the sliding sleeve (7) is in a sealed sliding fit with the outer wall of the puncture needle (2). The inner wall of the sliding sleeve (7) is detachably connected to a plurality of the communicating holes (3). The end of the transmission assembly away from the expansion rod (6) is connected to the sliding sleeve (7).

3. A self-fixing syringe needle according to claim 2, characterized in that: The transmission assembly includes a connecting groove (9) which is formed in the side wall of the puncture needle (2). One end of the connecting groove (9) is connected to the receiving groove (4), and the other end is connected to a sliding groove (10). The sliding groove (10) is located in the needle seat (1) and is connected to the inner cavity of the needle seat (1). A transmission rod (11) is slidably connected in the connecting groove (9). One end of the transmission rod (11) extends into the receiving groove (4) and is hinged to the expansion rod (6) with a hinge rod (12). A connecting rod (13) is slidably connected in the sliding groove (10). One end of the connecting rod (13) is fixedly connected to the transmission rod (11), and the other end is fixedly connected to the sliding sleeve (7).

4. The self-fixing syringe needle according to claim 1, characterized in that: The expansion rod (6) is hollow inside, and a support plate (14) is fixedly connected inside the expansion rod (6). A sliding rod (15) is slidably connected through the support plate (14). A spike (16) is fixedly connected to one end of the sliding rod (15) away from the rotating shaft (5). The other end of the sliding rod (15) away from the spike (16) extends out of the sliding rod (15) and is detachably connected to a compression assembly. A second spring (17) is sleeved on the outer wall of the sliding rod (15). The second spring (17) is fixed between the sliding rod (15) and the support plate (14).

5. A self-fixing syringe needle according to claim 4, characterized in that: The compression assembly includes a groove (18) formed on the bottom surface of the receiving groove (4). An air bladder (19) is provided inside the groove (18). The air bladder (19) is detachably connected to the sliding rod (15). The inflatable end of the air bladder (19) is fixedly connected to and connected to a connecting tube (20). The connecting tube (20) is fixedly connected to the side wall of the puncture needle (2), and one end of the connecting tube (20) away from the air bladder (19) extends into the groove. The inner cavity of the puncture needle (2) is connected to a squeezing tube (21) at one end of the connecting tube (20) away from the airbag (19). One end of the squeezing tube (21) is open and faces the needle seat (1). A pressure rod (22) is slidably connected inside the squeezing tube (21). One end of the pressure rod (22) extends out of the squeezing tube (21). A third spring (23) is fixed between the other end of the pressure rod (22) and the closed end of the squeezing tube (21).

6. A self-fixing syringe needle according to claim 1, characterized in that: Two flexible sealing strips (24) are provided at the top opening of the receiving groove (4). The opposite sides of the two flexible sealing strips (24) are fixed to the receiving groove (4). The two flexible sealing strips (24) cover the expansion rod (6) and the opposite sides of the two flexible sealing strips (24) are in contact and can be opened and closed.

7. A self-fixing syringe needle according to claim 2, characterized in that: The outer wall of the sliding sleeve (7) is in a sealed sliding fit with the inner wall of the needle seat (1).

8. A self-fixing syringe needle according to claim 1, characterized in that: The expansion rod (6) is made of hard plastic.

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