A nine-needle disposable sterile injection needle

Abstract

The present application relates to injection needle technical field, specifically disclose a kind of nine needle type disposable sterile injection needle, including syringe and the needle seat used in conjunction therewith, the syringe is provided with male head, the needle seat is provided with female head, the syringe is connected by the engagement of male head and female head, and male head and female head are provided with the positioning mechanism for locking its engagement structure, the positioning mechanism includes the clamping groove of being arranged in the male head outside, the outside of female head is provided with the unlocking mechanism for relieving the locking of positioning mechanism to engagement structure, and unlocking mechanism includes the limiting ring coaxially fixedly connected to the outside of female head.The application is through the quick locking and convenient separation of syringe and needle seat, greatly shorten needle seat replacement time, improve injection operation efficiency, avoid the coherence of overall injection process due to needle seat replacement time-consuming too long and influence.

Description

Technical Field

[0001] This invention relates to the field of injection needle technology, specifically a nine-needle disposable sterile injection needle. Background Technology

[0002] In the fields of medical aesthetics and clinical injection, disposable sterile injection needles are commonly used liquid delivery tools. To meet different injection needs, syringes usually need to be used with replaceable needle hubs. After the injection is completed, the needle hub is removed and replaced with a new needle hub. The syringe can then be used again or operated with needle hubs of different sizes. Currently, the connection between syringes and needle hubs widely adopts the standard structure of the Luer connector. The Luer connector consists of a male and a female end, relying on the conical surface fit to achieve connection and sealing. Depending on the locking method, Luer connectors are mainly divided into two types: Luer sliding joint: The male and female ends are directly inserted through a 6% standard taper and fixed by the friction between the conical surfaces. This structure is simple and easy to operate, but the connection stability is relatively weak and it is easy to loosen when subjected to external force. Luer locking: Based on the conical surface fit, the outer wall of the female head is provided with external threads, and the corresponding position of the male head is provided with locking wing or thread structure. When connecting, the male head is inserted into the female head and rotated at a certain angle so that the threads interlock, thereby achieving more reliable mechanical locking. The pull-out resistance of Luer locking is better than that of sliding joint, and it is currently the more commonly used connection method in clinical and cosmetic injection. With the development of medical aesthetic technology, multi-needle disposable sterile injection needles are gradually being used in scenarios such as water injection. These needle hubs are equipped with liquid diversion chambers, which distribute the single liquid flow output from the syringe to multiple needle tubes to achieve multi-point synchronous injection and improve operational efficiency. Nine-needle disposable sterile injection needles are also connected to the syringe through the above-mentioned Luer connector and are replaced after use to meet the requirements of sterile operation. The existing nine-needle disposable sterile injection needle has a low injection efficiency. This is because the Luer locking method is commonly used in clinical and cosmetic injections to connect the needle hub to the syringe. In this method, the male head needs to be rotated at a certain angle for both installation and disassembly, which reduces the efficiency of changing the needle hub and thus affects the injection efficiency. Therefore, a nine-needle disposable sterile injection needle is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a nine-needle disposable sterile injection needle to solve the problem mentioned in the background art that the injection efficiency is affected by the low efficiency of changing the needle hub in existing nine-needle disposable sterile injection needles.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A nine-needle disposable sterile injection needle includes a syringe and a needle hub for use therewith. The syringe is provided with a male head, and the needle hub is provided with a female head. The syringe and the needle hub are connected by the engagement of the male head and the female head. The male head and the female head are provided with a positioning mechanism for locking their engagement structure. The positioning mechanism includes a groove provided on the outside of the male head. The outside of the female head is provided with an unlocking mechanism for releasing the locking of the engagement structure by the positioning mechanism. The unlocking mechanism includes a limiting ring coaxially fixedly connected to the outside of the female head.

[0005] Preferably, the slot is located on the outer side of the male head near the end of the syringe, and the female head is provided with an elastic diaphragm valve inside, which is used to open the elastic diaphragm valve after the male head is inserted into the female head, so that the medicine in the syringe can flow into the needle seat. After the male head and the female head are separated, the elastic diaphragm valve automatically closes to prevent leakage from the needle seat.

[0006] Preferably, the positioning mechanism further includes a buckle on the female head, and the buckle is positioned close to the end where the female head connects to the male head to avoid the buckle affecting the sealing performance after the male head and female head are connected. The female head and the buckle are an integral structure, and the root of the buckle connected to the female head is elastic.

[0007] Preferably, the head and slot of the buckle are right-angled triangular prisms that cooperate with each other, and there are two buckles and two slots. The buckles and slots are symmetrically arranged about the axis of the female head and the male head, respectively.

[0008] Preferably, the unlocking mechanism further includes a protrusion on the outer side of each buckle head, and a through groove extending through both sides of the protrusion, the upper end of the follower strip being connected to the through groove.

[0009] Preferably, the upper end of the follower strip has a U-shaped structure, the through groove is inclined relative to the axis of the female head, and the upper end of the follower strip slides through the through groove, so that when the follower strip moves, it cooperates with the protrusion and the through groove on it to drive the head of the buckle to flip outward, so that the head of the buckle can separate from the corresponding slot.

[0010] Preferably, a support ring coaxial with the female head is movably sleeved on the outer side, and the lower end of the follower bar is vertically fixed to the surface of the support ring. The inner diameter of the support ring is smaller than the outer diameter of the limiting ring, so that the limiting ring can restrict the movement distance of the support ring. The distance between the support ring and the buckle is smaller than the distance between the limiting ring and the buckle.

[0011] Preferably, a top pressure plate is fixedly connected to one side of the support ring where the follower strip is located, and two top pressure plates are provided, which are symmetrically arranged about the axis of the support ring.

[0012] Preferably, the top pressure plate is an elastic plastic sheet with an arc-shaped structure. The distance between the two ends of the top pressure plate in its natural state is greater than the length of the follower strip, and the distance between the two ends of the top pressure plate from the outer side of the female head is less than the distance between the middle part of the top pressure plate from the outer side of the female head.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the nine-needle disposable sterile injection needle significantly shortens the needle hub replacement time and improves the efficiency of injection operation by quickly locking and easily separating the syringe and needle hub, and avoids affecting the continuity of the overall injection process due to excessive time spent replacing the needle hub. 1. The needle hub and syringe can be connected by direct engagement of the male and female heads. During the process, the base of the buckle will rotate outward until the head of the buckle corresponds to the position of the slot. Then, the head of the buckle will reset under the elastic action of its base and lock into the corresponding slot, thereby locking the needle hub and syringe and avoiding problems such as loosening caused by Luer slip connection. 2. By pressing the two top pressure plates, pressure is applied to the support ring, causing the support ring to move towards the limiting ring. During this process, the follower strip connected to the support ring moves synchronously, allowing the upper end of the follower strip to slide within the through groove. Due to the inclined design of the through groove, the buckle head can be flipped outward, thus achieving the purpose of separating the buckle head from the slot. At the moment the buckle head separates from the slot, the support ring simultaneously contacts the limiting ring. At this time, if the two top pressure plates are pressed again, the top pressure plates will apply pressure to the syringe, causing the syringe to move away from the support ring. In other words, it can assist in separating the syringe from the needle hub. By pressing the top pressure plates, not only is the buckle head separated from the slot, but the syringe is also separated from the needle hub, thus enabling quick replacement of the needle hub and helping to improve injection efficiency. 3. As the male syringe inserts into the female syringe, it gradually opens the elastic diaphragm valve, allowing the syringe to connect with the needle hub. At this point, the movement of the piston inside the syringe causes the needle on the needle hub to eject liquid, thus achieving the purpose of injection. During the injection process, the elastic diaphragm valve, through its one-way conduction characteristic, prevents external liquid from flowing back into the shunt chamber of the needle hub. After the male and female syringes separate, the elastic diaphragm valve resets, preventing liquid in the shunt chamber of the needle hub from leaking out of the needle tube, preventing contamination of the operating table, and maintaining a sterile environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of point A in the middle; Figure 5 This is a schematic diagram of the connection structure between the female head and the top pressure plate of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of point B; Figure 7 This is a schematic diagram of the connection structure between the support ring and the top pressure plate of the present invention; Figure 8 This is a schematic diagram of the syringe structure from below according to the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram of point C; Figure 10 This is a top view of the needle holder structure of the present invention.

[0015] In the diagram: 1. Syringe; 2. Needle hub; 3. Male head; 4. Female head; 5. Limiting ring; 6. Support ring; 7. Top pressure plate; 8. Buckle; 9. Protrusion; 10. Through groove; 11. Follower bar; 12. Slot; 13. Elastic diaphragm valve. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-10 The present invention provides the following technical solution: Example 1: To address the problem that in previous nine-needle disposable sterile injection needles, the Luer sliding joint was prone to loosening when connecting the needle hub 2 to the syringe 1, and the Luer locking joint required rotation and tightening, which was cumbersome, the following technical solution is provided: A nine-needle disposable sterile injection needle includes a syringe 1 and a needle hub 2 used in conjunction with it. The syringe 1 is provided with a male head 3, and the needle hub 2 is provided with a female head 4. The syringe 1 and the needle hub 2 are connected by the engagement of the male head 3 and the female head 4. The male head 3 and the female head 4 are provided with a positioning mechanism for locking their engagement structure. The positioning mechanism includes a slot 12 provided on the outside of the male head 3.

[0018] In a preferred embodiment of the invention, the slot 12 is located on the outer side of the male head 3 near the end of the syringe 1, and the female head 4 is provided with an elastic diaphragm valve 13, which is used to open the elastic diaphragm valve 13 after the male head 3 is inserted into the female head 4, so that the medicine in the syringe 1 can flow into the needle seat 2. After the male head 3 and the female head 4 are separated, the elastic diaphragm valve 13 automatically closes to prevent the needle seat 2 from leaking.

[0019] In the above technical solution, by setting an elastic diaphragm valve 13, during the connection between the syringe 1 and the needle seat 2, the male head 3 can open the elastic diaphragm valve 13 through the engagement of the male head 3 and the female head 4, thereby enabling the syringe 1 and the needle seat 2 to conduct. After the syringe 1 and the needle seat 2 are separated, the elastic diaphragm valve 13 automatically recovers, preventing the liquid in the liquid diversion chamber of the needle seat 2 from leaking out of the needle tube, preventing contamination of the operating table, and maintaining a sterile environment.

[0020] In a preferred embodiment of the invention, the positioning mechanism further includes a buckle 8 provided on the female head 4, and the buckle 8 is located close to the end where the female head 4 is connected to the male head 3, so as to avoid the buckle 8 affecting the sealing performance after the male head 3 and the female head 4 are connected. The female head 4 and the buckle 8 are an integral structure, and the root of the buckle 8 connected to the female head 4 is elastic.

[0021] In the above technical solution, the buckle 8 is cut and formed by the female head 4 body, and the root retains an elastic thin-walled connecting section. It can achieve elastic reset without the need to set additional elastic components such as torsion springs. While ensuring the locking function, it simplifies the structure, reduces costs, and avoids excessive cost increase due to the pin seat 2 being a disposable consumable.

[0022] In a preferred embodiment of the invention, the head of the buckle 8 and the slot 12 are right-angled triangular prisms that cooperate with each other, and there are two buckles 8 and two slots 12. The buckles 8 and the slots 12 are symmetrically arranged about the axis of the female head 4 and the male head 3, respectively.

[0023] In the above technical solution, by setting the head of the buckle 8 and the slot 12 as right-angled triangular prisms that cooperate with each other, the male head 3 and the female head 4 cannot easily move away from each other under the action of external force after they are connected, thereby ensuring the stability of the needle seat 2 and the syringe 1 after connection.

[0024] according to Figures 1-4 , Figures 8-9 as well as Figure 10 When in use, the male connector 3 and the female connector 4 are directly connected by a Luer sliding joint; During the connection process of the male head 3 and the female head 4, the head of the latch 8 will be squeezed by the male head 3 and flipped outward. When the head of the latch 8 moves to the corresponding slot 12 position, the head of the latch 8 will be reset by the reset action at its root. During the reset process of the head of the buckle 8, it will gradually engage with the slot 12. When the slot 12 engages with the head of the buckle 8, the male head 3 and the female head 4 will be stably connected and will not easily come loose, thus solving the problem of easy loosening of Luer sliding joints. During the connection process between the male head 3 and the female head 4, the male head 3 will gradually extend into the interior of the female head 4, thereby opening the elastic diaphragm valve 13. After the elastic diaphragm valve 13 is opened, the syringe 1 and the needle seat 2 will be connected, so that the needle on the needle seat 2 can spray liquid by moving the piston on the syringe 1.

[0025] Example 2: To solve the problem in Example 1 that after the needle seat 2 and the syringe 1 are quickly and stably connected, it is not convenient to quickly separate the needle seat 2 and the syringe 1, the following technical solution is provided. Specifically, the outer side of the female head 4 is provided with an unlocking mechanism for releasing the locking of the positioning mechanism on the locking structure, and the unlocking mechanism includes a limiting ring 5 coaxially fixedly connected to the outer side of the female head 4.

[0026] In a preferred embodiment of the invention, the unlocking mechanism further includes a protrusion 9 provided on the outer side of the head of each buckle 8, and a through groove 10 extending through both sides of the protrusion 9, with the upper end of the follower strip 11 connected to the through groove 10.

[0027] In the above technical solution, by setting the protrusion 9, it is easy to drive the head of the buckle 8 to flip outward by moving the follower bar 11, thereby making it possible for the head of the buckle 8 to separate from the slot 12.

[0028] In a preferred embodiment of the invention, the upper end of the follower bar 11 has a U-shaped structure, the through groove 10 is inclined relative to the axis of the female head 4, and the upper end of the follower bar 11 slides through the through groove 10, so that when the follower bar 11 moves, it cooperates with the protrusion 9 and the through groove 10 thereon to drive the head of the buckle 8 to flip outward, so that the head of the buckle 8 can separate from the corresponding slot 12.

[0029] In the above technical solution, by setting the through groove 10 to be inclined, when the follower bar 11 moves in the direction of the female head 4 axis, it can drive the head of the buckle 8 to flip outward through the through groove 10 so that the head of the buckle 8 can be separated from the buckle groove 12.

[0030] In a preferred embodiment of the invention, a support ring 6 coaxially is movably sleeved on the outer side of the female head 4, and the lower end of the follower bar 11 is vertically fixed to the surface of the support ring 6. The inner diameter of the support ring 6 is smaller than the outer diameter of the limiting ring 5, so that the limiting ring 5 can limit the distance of movement of the support ring 6. The distance between the support ring 6 and the buckle 8 is smaller than the distance between the limiting ring 5 and the buckle 8.

[0031] In the above technical solution, by setting the limiting ring 5, the movement distance of the support ring 6 can be limited. This allows the needle seat 2 and the syringe 1 to be subjected to opposite forces after the head of the buckle 8 is separated from the slot 12 and the top pressure plate 7 continues to be squeezed. This helps to promote the separation of the two and improves the efficiency of disassembling the needle seat 2.

[0032] In a preferred embodiment of the invention, a top pressure plate 7 is fixedly connected to one side of the support ring 6 where the follower strip 11 is located, and two top pressure plates 7 are provided, which are symmetrically arranged about the axis of the support ring 6.

[0033] In the above technical solution, by setting the top pressure plate 7, it not only helps to drive the support ring 6 to move towards the limiting ring 5, but also makes the needle seat 2 and the syringe 1 subject to opposite forces, which helps to separate the male head 3 and the female head 4.

[0034] In a preferred embodiment of the invention, the top pressure plate 7 is an elastic plastic sheet, and the top pressure plate 7 has an arc-shaped structure. The distance between the two ends of the top pressure plate 7 in its natural state is greater than the length of the follower strip 11, and the distance between the two ends of the top pressure plate 7 and the outer side of the female head 4 is less than the distance between the middle part of the top pressure plate 7 and the outer side of the female head 4.

[0035] In the above technical solution, the top pressure plate 7 is made of an elastic arc-shaped plastic sheet, which helps to reduce costs and enables the support ring 6 to move and the needle seat 2 and syringe 1 to be subjected to opposite forces when the operator presses the middle of the top pressure plate 7.

[0036] according to Figures 5-7 When the head of the buckle 8 is engaged with the slot 12, the pressure plate 7 will contact the lower end of the syringe 1. When it is necessary to disconnect the head of the buckle 8 from the slot 12, you only need to use two fingers of one hand to pinch the pressure plate 7 respectively, so that the middle of the two pressure plates 7 are close to the female head 4. During the above process, because the pressure plate 7 is in contact with the syringe 1, when the pressure plate 7 deforms, it will squeeze the support ring 6, causing the support ring 6 to move towards the limiting ring 5. When the support ring 6 moves, the follower bar 11 connected to it moves synchronously. When the follower bar 11 moves, its upper end slides on the inclined through groove 10, which allows the heads of the two buckles 8 to flip outward, causing the heads of the buckles 8 to gradually separate from the corresponding grooves 12. When the head of the buckle 8 separates from the slot 12, the support ring 6 will also come into contact with the limiting ring 5, thus preventing it from moving further. At this time, if the finger continues to apply pressure to the top pressure plate 7, the support ring 6, the limiting ring 5 and the female head 4 will be subjected to opposite forces to the syringe 1, which will cause the male head 3 on the syringe 1 to separate from the female head 4. In other words, when it is necessary to separate the needle hub 2 from the syringe 1, only two fingers of one hand are needed to press the two pressure plates 7, which makes the separation of the needle hub 2 from the syringe 1 quick enough and helps to indirectly improve the efficiency of injection.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[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 nine-needle disposable sterile injection needle, comprising a syringe (1) and a needle hub (2) used in conjunction with it, characterized in that: The syringe (1) is provided with a male head (3), and the needle seat (2) is provided with a female head (4). The syringe (1) and the needle seat (2) are connected by the engagement of the male head (3) and the female head (4). The male head (3) and the female head (4) are provided with a positioning mechanism for locking their engagement structure. The positioning mechanism includes a slot (12) provided on the outside of the male head (3). The positioning mechanism also includes a buckle (8) provided on the female head (4). The outside of the female head (4) is provided with an unlocking mechanism for releasing the locking of the engagement structure by the positioning mechanism. The unlocking mechanism includes a limiting ring (5) coaxially fixedly connected to the outside of the female head (4). The unlocking mechanism also includes a protrusion (9) provided on the outside of the head of each buckle (8). The protrusion (9) is provided with a through groove (10) penetrating both sides. The upper end of the follower strip (11) is connected to the through groove (10). The upper end of the follower strip (11) is a U-shaped structure. 10) The follower bar (11) is inclined relative to the axis of the female head (4) and the upper end of the follower bar (11) slides through the through groove (10). When the follower bar (11) moves, it cooperates with the protrusion (9) and the through groove (10) on it to drive the head of the buckle (8) to flip outward so that the head of the buckle (8) can separate from the corresponding slot (12). The outer side of the female head (4) is movably fitted with a support ring (6) coaxial with it, and the lower end of the follower bar (11) is vertically fixed to the support. The inner diameter of the support ring (6) is smaller than the outer diameter of the limiting ring (5) on the surface of the ring (6), so that the limiting ring (5) can limit the distance of movement of the support ring (6). The distance between the support ring (6) and the buckle (8) is smaller than the distance between the limiting ring (5) and the buckle (8). The support ring (6) is provided with a top pressure plate (7) fixedly connected to one side of the follower strip (11), and there are two top pressure plates (7). The two top pressure plates (7) are symmetrically arranged about the axis of the support ring (6).

2. The nine-needle disposable sterile injection needle according to claim 1, characterized in that: The slot (12) is located on the outside of the male head (3) near the end of the syringe (1). The female head (4) is provided with an elastic diaphragm valve (13) to open the elastic diaphragm valve (13) after the male head (3) is inserted into the female head (4), so that the medicine in the syringe (1) can flow into the needle seat (2). After the male head (3) and the female head (4) are separated, the elastic diaphragm valve (13) automatically closes to prevent the needle seat (2) from leaking.

3. The nine-needle disposable sterile injection needle according to claim 1, characterized in that: The buckle (8) is positioned close to the end where the female head (4) and male head (3) are connected, so as to avoid the buckle (8) affecting the sealing performance after the male head (3) and female head (4) are connected. The female head (4) and buckle (8) are an integral structure, and the root of the buckle (8) connected to the female head (4) is elastic.

4. A nine-needle disposable sterile injection needle according to claim 3, characterized in that: The head and slot (12) of the buckle (8) are right-angled triangular prisms that cooperate with each other, and there are two buckles (8) and two slots (12). The buckles (8) and slots (12) are symmetrically arranged about the axis of the female head (4) and the male head (3), respectively.

5. A nine-needle disposable sterile injection needle according to claim 4, characterized in that: The top pressure plate (7) is an elastic plastic sheet and has an arc-shaped structure. The distance between the two ends of the top pressure plate (7) in its natural state is greater than the length of the follower strip (11), and the distance between the two ends of the top pressure plate (7) and the outside of the female head (4) is less than the distance between the middle part and the outside of the female head (4).

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