A medical injection needle

Abstract

The application relates to the technical field of medical instruments, and discloses a medical injection needle, which comprises an injection shell and a second fixing plate, the top of the inner wall of the injection shell is fixedly connected with an injection cavity, the outer surface of the injection cavity is fixedly installed with a first fixing plate, the bottom of the injection cavity is fixedly connected with a connecting pipe, the bottom of the first fixing plate is provided with a clamping mechanism, and the clamping mechanism comprises a fixing frame, a first rotating shaft, a limiting block and a connecting arm. The medical injection needle effectively solves the problem that the injection needle cannot be quickly connected with a device for replacement in the actual use process, thereby causing a long preparation work before injection, and thus causing a low device use efficiency. In the whole operation process, the injection needle and the injection cavity inside the device can be quickly clamped and fixed, so that the device can be quickly put into use, and the use efficiency of the device is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a medical injection needle. Background Technology

[0002] In the medical industry, especially in the cosmetic medical industry, injections are a common treatment method. They involve injecting medication into the epidermis using a needle to achieve the desired cosmetic effect.

[0003] According to the safety injection needle with patent number CN 107929884 B, this design features a claw on the protective sleeve, a limiting groove on the connecting tube, and a limiting block located within the limiting groove on the inner wall of the clamping part. The limiting groove contains filler material. In the initial state, the claw is blocked by the filler material and cannot fall into the limiting groove. When locking is required, rotating the connecting tube removes the filler material from the limiting block, allowing the protective sleeve to slide completely enclose the needle. The free end of the claw is located within the limiting groove, locking the axial movement of the protective sleeve. A flexible plug is provided at the end of the protective sleeve. After injection, the needle tip is easily covered by the flexible plug, allowing the protective sleeve to slide conveniently to completely enclose the needle after injection, preventing injury to the user from sharp objects. The safety injection needle of this invention has a compact structure that does not affect the injection angle. Operation is also relatively convenient. In the preferred embodiment, the safety injection needle of the present invention is easy to process and produce, and the flexible plug provides better protection for the needle. After covering the needle, it can completely lock the protective sleeve and is not easy to fall off.

[0004] Currently, the internal injection needle fixing structure of this device is relatively simple, making it difficult to quickly connect and replace the needle during use. This results in a long preparation time before injection, leading to low device efficiency. Furthermore, the device does not have an injection depth adjustment function for the internal injection needle, requiring medical personnel to manually determine the insertion depth, which prevents the device from completing injections quickly. To address these issues, this invention introduces a medical injection needle. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a medical injection needle that offers advantages such as quick and easy installation and use with the device, adjustable injection depth during injection, and stable injection. It solves the problems of a simple fixing structure that hinders quick connection and replacement with the device, leading to lengthy pre-injection preparation and low device efficiency. Furthermore, the invention lacks injection depth adjustment for the internal needle, requiring medical personnel to manually determine the needle insertion depth, thus preventing the device from quickly completing injections.

[0006] This invention provides the following technical solution: a medical injection needle, comprising an injection shell and a second fixing plate. An injection cavity is fixedly connected to the top of the inner wall of the injection shell. A first fixing plate is fixedly installed on the outer surface of the injection cavity. A connecting tube is fixedly connected to the bottom of the injection cavity. A locking mechanism is provided at the bottom of the first fixing plate. The locking mechanism includes a fixing frame, a first rotating shaft, a limiting block, and a connecting arm. The top of the fixing frame is fixedly connected to the bottom of the first fixing plate. The outer surfaces at both ends of the first rotating shaft are rotatably connected to the core of the fixing frame. The side of the limiting block is fixedly connected to one end of the first rotating shaft. The side of the limiting block fits against the side of the fixing frame. The inner wall of the connecting arm is rotatably connected to the outer surface of the limiting block.

[0007] As a preferred improvement of the medical injection needle provided by the present invention, the side of the injection shell is provided with a sliding groove, and the inner wall of the sliding groove is provided with a positioning mechanism. The positioning mechanism includes a moving block, a second rotating shaft and a rotating arm. The outer surface of one side of the moving block is slidably connected to the inner wall of the sliding groove, the two ends of the second rotating shaft are rotatably connected to the inner wall of the moving block, and the inner wall of the rotating arm is rotatably connected to the outer surface of the second rotating shaft.

[0008] As a preferred improvement of the medical injection needle provided by the present invention, one end of the connecting arm is fixedly connected to an extension plate, and the other end of the connecting arm is fixedly installed with a compression plate.

[0009] As a preferred improvement of the medical injection needle provided by the present invention, a needle hub is fixedly installed on the top of the second fixing plate, and the inner wall of the needle hub is engaged with the outer surface of the connecting tube. A needle sleeve is fixedly connected to the bottom of the second fixing plate, and an injection needle is fixedly installed on the inner wall of the needle sleeve.

[0010] As a preferred improvement of the medical injection needle provided by the present invention, one end of the rotating arm is fixedly connected to a bonding plate, and the side of the bonding plate is bonded to the outer surface of the injection shell.

[0011] As a preferred improvement of the medical injection needle provided by the present invention, a connecting block is fixedly connected to the side of the movable block, an extension rod is welded to the side of the connecting block, and a fixing block is fixedly installed at one end of the extension rod.

[0012] As a preferred improvement of the medical injection needle provided by the present invention, a connecting plate is further fixedly installed at the bottom of the second fixing plate. The bottom of the connecting plate is in contact with the top of the fixing block, and the top of the second fixing plate presses against the extension plate, thereby driving the connecting arm to rotate. This causes the pressing plate to press against the top of the second fixing plate, thereby clamping and fixing the needle seat at the top of the second fixing plate to the connecting tube. By pressing the rotating arm, the bonding plate connected to the end of the rotating arm is made to fit against the outer surface of the injection shell, thereby forming a force to position and fix the moving block.

[0013] As a preferred improvement of the medical injection needle provided by the present invention, the inner wall of the injection cavity is fitted with a squeezing block, and a connecting rod is fixedly connected to the top of the squeezing block.

[0014] As a preferred improvement of the medical injection needle provided by the present invention, a pressing plate is fixedly installed on the top of the connecting rod, a telescopic spring is welded to the bottom of the pressing plate, the other end of the telescopic spring is welded to the top of the injection shell, and the connecting rod passes through the interior of the telescopic spring.

[0015] As a preferred improvement of the medical injection needle provided by the present invention, the number of the fixing frame, the first rotating shaft, the connecting arm, the extension plate and the squeezing plate is four, and the four fixing frames, the first rotating shaft, the connecting arm, the extension plate and the squeezing plate are all evenly distributed around the center of the first fixing plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This medical injection needle, through its snap-fit ​​mechanism, allows for several steps during use. First, the second fixing plate, on which the injection needle is mounted, moves upward, causing the inner wall of the needle hub to snap into the outer surface of the connecting tube fixedly mounted at the bottom of the injection cavity. Simultaneously, as the second fixing plate moves, an extension plate extends from its top, creating a compression force. This causes the connecting arm connected to the bottom of the extension plate to rotate around the outer surface of the first rotating shaft, thereby moving the compression plate connected to one end of the first rotating shaft inward. This further compresses the bottom of the second fixing plate, securing it to the bottom of the injection cavity. This effectively solves the problem of slow needle connection and replacement during actual use, which leads to lengthy pre-injection preparation and low device efficiency. The entire operation effectively and quickly snaps the injection needle into the injection cavity, enabling rapid deployment and significantly improving the device's efficiency.

[0018] 2. This medical injection needle, through its positioning mechanism, allows for precise positioning of the injection needle. After the needle is engaged and fixed within the injection cavity, the sliding block connected to the inner wall of the sliding groove is adjusted and moved to a suitable position. This causes the connecting block and its extension rod, the top of the fixing block, and the bottom of the connecting plate to align, providing support and fixation. Pressing the rotating arm then causes the end plate to adhere to the outer surface of the injection shell, creating force to position and fix the moving block. This effectively positions the injection needle and solves the problem of devices lacking depth adjustment, requiring medical personnel to manually control the needle insertion depth, thus hindering rapid injection. The entire operation effectively positions and supports the injection needle, ensuring its stability during injection, facilitating rapid drug injection, and improving injection efficiency. Attached Figure Description

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

[0020] Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure;

[0021] Figure 3 This is a schematic diagram of the snap-fit ​​mechanism of the present invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point B.

[0024] In the diagram: 1. Injection shell; 2. Injection cavity; 3. First fixing plate; 4. Fixing frame; 5. First rotating shaft; 6. Limiting block; 7. Connecting arm; 8. Extension plate; 9. Squeezing plate; 10. Connecting tube; 11. Second fixing plate; 12. Needle seat; 13. Needle sheath; 14. Injection needle; 15. Connecting plate; 16. Sliding groove; 17. Moving block; 18. Second rotating shaft; 19. Rotating arm; 20. Adhesive plate; 21. Connecting block; 22. Extension rod; 23. Fixing block; 24. Squeezing block; 25. Connecting rod; 26. Pressing plate; 27. Telescopic spring. 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] Please see Figure 1-5 A medical injection needle includes an injection shell 1 and a second fixing plate 11. An injection cavity 2 is fixedly connected to the top of the inner wall of the injection shell 1. A first fixing plate 3 is fixedly installed on the outer surface of the injection cavity 2. A connecting tube 10 is fixedly connected to the bottom of the injection cavity 2. A locking mechanism is provided at the bottom of the first fixing plate 3. The locking mechanism includes a fixing frame 4, a first rotating shaft 5, a limiting block 6, and a connecting arm 7. The top of the fixing frame 4 is fixedly connected to the bottom of the first fixing plate 3. The outer surfaces at both ends of the first rotating shaft 5 are rotatably connected to the core of the fixing frame 4. The side of the limiting block 6... The surface is fixedly connected to one end of the first rotating shaft 5, the side of the limiting block 6 is attached to the side of the fixing frame 4, and the inner wall of the connecting arm 7 is rotatably connected to the outer surface of the limiting block 6. The snap-fit ​​mechanism effectively solves the problem that the injection needle cannot be quickly connected and replaced with the device during actual use, which leads to a long preparation time before injection and thus low device efficiency. During the entire operation, the injection needle can be quickly snapped and fixed with the injection cavity 2 inside the device, so that the device can be put into use quickly and greatly improve the device's efficiency.

[0027] The injection shell 1 has a sliding groove 16 on its side. The inner wall of the sliding groove 16 is equipped with a positioning mechanism, which includes a moving block 17, a second rotating shaft 18, and a rotating arm 19. The outer surface of one side of the moving block 17 is slidably connected to the inner wall of the sliding groove 16. By adjusting the moving block 17 slidably connected to the inner wall of the sliding groove 16 and moving it to a suitable position, the top of the connecting block 21 connected to the side of the moving block 17, its extension rod 22 connected to the side of the connecting block 21, and the top of the fixing block 23 are fitted against the bottom of the connecting plate 15. After the injection needle inside the device is engaged and fixed with the injection cavity 2, by adjusting the moving block 17 slidably connected to the inner wall of the sliding groove 16 and moving it to a suitable position, the top of the connecting block 21 connected to the side of the moving block 17, its extension rod 22 connected to the side of the connecting block 21, and the top of the fixing block are fitted against the bottom of the connecting plate 15. The support mechanism effectively ensures the stability of the injection. By pressing the rotating arm 19, the bonding plate 20 connected to the end of the rotating arm 19 is made to fit against the outer surface of the injection shell 1, thereby creating a force to position and fix the moving block 17. The two ends of the second rotating shaft 18 are rotatably connected to the inner wall of the moving block 17, and the inner wall of the rotating arm 19 is rotatably connected to the outer surface of the second rotating shaft 18. The positioning mechanism effectively solves the problem that in actual use, the device does not have an injection depth adjustment function for the internal injection needle 14, which requires medical personnel to manually control the depth of needle insertion, thus preventing the device from quickly completing the injection. Throughout the operation, the device effectively positions and supports the injection needle, ensuring the stability of the injection needle 14 during injection, facilitating the rapid completion of drug injection by medical personnel, and effectively improving injection efficiency.

[0028] Wherein; one end of the connecting arm 7 is fixedly connected to the extension plate 8, and the other end of the connecting arm 7 is fixedly installed with the extrusion plate 9. The top of the second fixed plate 11 extrudes the extension plate 8, thereby driving the connecting arm 7 to rotate, so that the extrusion plate 9 extrudes the top of the second fixed plate, thereby clamping and fixing the pin seat 12 on the top of the second fixed plate 11 to the connecting tube 10.

[0029] The second fixing plate 11 has a needle seat 12 fixedly installed on its top, and the inner wall of the needle seat 12 is engaged with the outer surface of the connecting tube 10. The bottom of the second fixing plate 11 is fixedly connected to a needle sleeve 13, and the inner wall of the needle sleeve 13 is fixedly installed with an injection needle 14. The second fixing plate 11 with the injection needle 14 is moved upward, thereby engaging the inner wall of the needle seat 12 with the outer surface of the connecting tube 10 fixedly installed at the bottom of the injection cavity 2. At the same time, as the second fixing plate 11 moves, the top of the second fixing plate 11 extends the plate 8 to form a compression, thereby driving the connecting arm 7 connected to the bottom of the extension plate 8 to rotate around the outer surface of the first rotating shaft 5, thereby driving the compression plate 9 connected to one end of the first rotating shaft 5 to move inward, thereby forming a compression on the bottom of the second fixing plate 11.

[0030] One end of the rotating arm 19 is fixedly connected to a bonding plate 20. The side of the bonding plate 20 is attached to the outer surface of the injection shell 1. By pressing the rotating arm 19, the bonding plate 20 connected to the end of the rotating arm 19 is attached to the outer surface of the injection shell 1, thereby forming a force to position and fix the moving block 17.

[0031] The movable block 17 is fixedly connected to a connecting block 21 on its side. An extension rod 22 is welded to the side of the connecting block 21. A fixing block 23 is fixedly installed at one end of the extension rod 22. By adjusting the position of the movable block 17 on the injection shell 1, the top of the fixing block 23 is made to fit against the bottom of the connecting plate 15, thereby supporting the connecting plate 15 and the second fixing plate 11 on its top and keeping it stable.

[0032] Among them, a connecting plate 15 is fixedly installed at the bottom of the second fixing plate 11, and the bottom of the connecting plate 15 is in contact with the top of the fixing block 23.

[0033] The inner wall of the injection cavity 2 is fitted with an extrusion block 24, and a connecting rod 25 is fixedly connected to the top of the extrusion block 24.

[0034] The connecting rod 25 has a pressing plate 26 fixedly installed on its top. A telescopic spring 27 is welded to the bottom of the pressing plate 26. The other end of the telescopic spring 27 is welded to the top of the injection housing 1. The connecting rod 25 passes through the inside of the telescopic spring 27 and presses the pressing plate 26, thereby driving the connecting rod 25 and the squeezing block 24 connected to its bottom downwards, thus completing the injection of the medicine inside the injection cavity 2. At the same time, the elastic force of the telescopic spring 27 on the bottom of the pressing plate 26 will cause it, along with the connecting rod 25 and the squeezing block 24 connected to its bottom, to reset.

[0035] The number of the four components—fixed frame 4, first rotating shaft 5, connecting arm 7, extension plate 8, and extrusion plate 9—is four, and the four fixed frames 4, first rotating shaft 5, connecting arm 7, extension plate 8, and extrusion plate 9 are evenly distributed around the center of the first fixed plate 3. This design can effectively ensure that it can form a relatively stable limit inside and facilitate its stable operation during the injection process.

[0036] Working principle: In use, the second fixing plate 11, on which the injection needle 14 is installed, is first moved upward, thereby causing the inner wall of the needle seat 12 to engage with the outer surface of the connecting tube 10 fixedly installed at the bottom of the injection cavity 2. At the same time, as the second fixing plate 11 moves, the top of the second fixing plate 11 extends the plate 8 to form a compression, thereby causing the connecting arm 7 connected to the bottom of the extension plate 8 to rotate around the outer surface of the first rotating shaft 5, thereby causing the compression plate 9 connected to one end of the first rotating shaft 5 to move inward, thereby compressing the bottom of the second fixing plate 11 and thus engaging and fixing it with the bottom of the injection cavity 2.

[0037] Meanwhile, after the injection needle inside the device is engaged and fixed with the injection cavity 2, the movable block 17, which is slidably connected to the inner wall of the sliding groove 16, is adjusted and moved to a suitable position. This causes the top of the connecting block 21 connected to the side of the movable block 17 and the extension rod 22 and the fixing block 23 connected to the side of the connecting block 21 to fit against the bottom of the connecting plate 15, thus providing support and fixation. Then, by pressing the rotating arm 19, the fitting plate 20 connected to the end of the rotating arm 19 is made to fit against the outer surface of the injection shell 1, thereby creating a force to position and fix the movable block 17, thus effectively completing the positioning of the injection needle. Then, the pressing plate 26 is pressed and the connecting rod 25 and its squeezing block 24 are pushed to extend and retract within the inner wall of the injection cavity 2, thereby completing the injection of the drug.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A medical injection needle, characterized in that, The device includes an injection shell (1) and a second fixing plate (11). The top of the inner wall of the injection shell (1) is fixedly connected to an injection cavity (2). The outer surface of the injection cavity (2) is fixedly installed with a first fixing plate (3). The bottom of the injection cavity (2) is fixedly connected to a connecting pipe (10). The bottom of the first fixing plate (3) is provided with a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a fixing frame (4), a first rotating shaft (5), a limiting block (6), and a connecting arm (7). The top of the fixing frame (4) is fixedly connected to the bottom of the first fixing plate (3). The outer surfaces of both ends of the first rotating shaft (5) are rotatably connected to the core of the fixing frame (4). The side of the limiting block (6) is fixedly connected to one end of the first rotating shaft (5). The side of the limiting block (6) is in contact with the side of the fixing frame (4). The inner wall of the connecting arm (7) is rotatably connected to the outer surface of the limiting block (6). With the snap-fit ​​mechanism in place, during use, the second fixing plate, on which the injection needle is mounted, is first moved upwards, thereby snapping the inner wall of the needle hub with the outer surface of the connecting tube fixedly mounted at the bottom of the injection cavity. Simultaneously, as the second fixing plate moves, the top of the second fixing plate presses against the extension plate, causing the connecting arm connected to the bottom of the extension plate to rotate around the outer surface of the first rotating shaft. This causes the extrusion plate connected to one end of the first rotating shaft to move inwards, thereby pressing against the bottom of the second fixing plate and snapping it into place with the bottom of the injection cavity.

2. The medical injection needle according to claim 1, characterized in that: The side of the injection shell (1) is provided with a sliding groove (16). The inner wall of the sliding groove (16) is provided with a positioning mechanism. The positioning mechanism includes a moving block (17), a second rotating shaft (18) and a rotating arm (19). The outer surface of one side of the moving block (17) is slidably connected to the inner wall of the sliding groove (16). The two ends of the second rotating shaft (18) are rotatably connected to the inner wall of the moving block (17). The inner wall of the rotating arm (19) is rotatably connected to the outer surface of the second rotating shaft (18).

3. A medical injection needle according to claim 1, characterized in that: An extension plate (8) is fixedly connected to one end of the connecting arm (7), and an extrusion plate (9) is fixedly installed at the other end of the connecting arm (7).

4. A medical injection needle according to claim 1, characterized in that: A needle holder (12) is fixedly installed on the top of the second fixing plate (11), and the inner wall of the needle holder (12) is engaged with the outer surface of the connecting tube (10). A needle sleeve (13) is fixedly connected to the bottom of the second fixing plate (11), and an injection needle (14) is fixedly installed on the inner wall of the needle sleeve (13).

5. A medical injection needle according to claim 2, characterized in that: One end of the rotating arm (19) is fixedly connected to a bonding plate (20), and the side of the bonding plate (20) is bonded to the outer surface of the injection shell (1).

6. A medical injection needle according to claim 2, characterized in that: A connecting block (21) is fixedly connected to the side of the movable block (17), and an extension rod (22) is welded to the side of the connecting block (21). A fixing block (23) is fixedly installed at one end of the extension rod (22).

7. A medical injection needle according to claim 1, characterized in that: A connecting plate (15) is fixedly installed at the bottom of the second fixing plate (11), and the bottom of the connecting plate (15) is in contact with the top of the fixing block (23).

8. A medical injection needle according to claim 1, characterized in that: The inner wall of the injection cavity (2) is fitted with a squeezing block (24), and a connecting rod (25) is fixedly connected to the top of the squeezing block (24).

9. A medical injection needle according to claim 8, characterized in that: A pressing plate (26) is fixedly installed on the top of the connecting rod (25), and a telescopic spring (27) is welded to the bottom of the pressing plate (26). The other end of the telescopic spring (27) is welded to the top of the injection shell (1), and the connecting rod (25) passes through the interior of the telescopic spring (27).

10. A medical injection needle according to claim 1, characterized in that: The number of the fixed frame (4), the first rotating shaft (5), the connecting arm (7), the extension plate (8) and the extrusion plate (9) is four, and the four fixed frames (4), the first rotating shaft (5), the connecting arm (7), the extension plate (8) and the extrusion plate (9) are all evenly distributed around the center of the first fixed plate (3).

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