A syringe connector

Abstract

This invention belongs to the field of medical syringe technology, specifically referring to a syringe connector, including a main body with an inlet end and an outlet end. The inlet end connects to the syringe. The main body has a flow channel with both ends communicating, and a sealing element is placed within the flow channel, dividing the flow channel into an inlet channel and an outlet channel. After the connector is connected to the needle, the needle passes through the sealing element and extends into the inlet channel, allowing liquid from the syringe to flow into the needle. The main body can take various shapes, as long as both ends are cylindrical. A common design is a tubular structure for the entire main body. The inlet end enables the connector to be matched with the syringe; the outlet end enables the needle to be matched with the connector. The connector acts as a carrier to connect the syringe to a mismatched needle. Furthermore, the syringe connector can prevent the waste of existing resources in the market.

Description

Technical Field

[0001] This invention belongs to the field of medical syringe technology, and particularly relates to a syringe connector. Background Technology

[0002] In clinical settings, when doctors use standard Luer connector syringes to inject insulin, they typically draw the insulin from the container into the syringe before injection. The needles used on Luer connector syringes for drawing insulin are generally standard sterile injection needles. These needles are typically 25G or 27G, which are relatively thick. While thicker needles are advantageous for drawing the medication, they can cause significant pain during injection.

[0003] Insulin needles are relatively thin, resulting in less pain during injection. However, because of their thinness, drawing the medication from an insulin needle is much more difficult than with a regular sterile injection needle.

[0004] Secondly, commercially available insulin needles are generally designed for use with dedicated insulin pens and cannot be connected to standard Luer connector syringes. While some temporary connectors exist, these are often non-compliant, lack proper sealing, are prone to infection, leak, and are inconvenient to use. Therefore, there is an urgent need for a component that allows for connection and use even when syringes and needles are incompatible, without leakage. Summary of the Invention

[0005] To address the above technical problems, the present invention provides a syringe connector, wherein one end of the syringe connector is connected to the syringe and the other end is connected to the needle, and a sealing element is used to seal it to prevent leakage.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A syringe connector includes a main body, one end of which is an inlet end and the other end is connected to an outlet end. The main body can take various shapes, as long as both ends are cylindrical. The inlet end is connected to the syringe, and the outlet end of the main body is connected to the needle. The main body has a flow channel with two communicating ends. The flow channel contains a sealing element, and the sealing element divides the flow channel into an inlet channel and an outlet channel.

[0008] The connector serves as a carrier to connect the syringe and the finer needle. When the connector is connected to the needle, the needle passes through the seal and extends into the inlet channel.

[0009] In a preferred embodiment of the present invention, the syringe connector of the present invention is applied to the connection between a Luer syringe and an insulin needle. The inlet end is provided with a first Luer connector for connecting the syringe, and the outlet end is provided with a first external thread for connecting the insulin needle, thereby achieving a stable connection between the Luer syringe and the insulin needle.

[0010] In a preferred embodiment of the present invention, the inlet channel includes a section B facing the seal and a section A facing away from the seal; section A is tapered, and the inner diameter of the end of section A facing the seal is smaller than the inner diameter of the end of section A facing away from the seal.

[0011] The taper of section A is adapted to the head of the Luer connector syringe, achieving a sealing effect between the two, preventing leakage at the connection between the connector and the syringe with the Luer connector, and avoiding contamination of the medicine. When the connector is connected to the syringe, the Luer connector of the syringe is accommodated in section A, and the sealing element mates with the end face of section B to achieve a sealing effect.

[0012] In a preferred embodiment of the present invention, the main body includes a first connector and a second connector, wherein the first connector and the second connector are detachably connected.

[0013] The first connector has a first cavity with two communicating ends, and the second connector has a second cavity with two communicating ends.

[0014] When the first connector and the second connector are connected, the first cavity and the second cavity combine to form the flow channel.

[0015] Dividing the main body into a first connector and a second connector significantly reduces manufacturing difficulty and costs compared to a one-piece structure. Both the first and second connectors can take various shapes, as long as both ends are cylindrical. A common approach is to use tubular structures for both connectors.

[0016] In a preferred embodiment of the present invention, the sealing element is located within the first cavity. When the first connector and the second connector are connected, the end face of the second connector facing the first connector contacts the sealing element, ensuring a seal after the first and second connectors are connected and preventing leakage. The insulin needle punctures the sealing element and penetrates into the head of the Luer connector syringe, thereby connecting the medication channel. The sealing element serves to prevent the medication from leaking out from the connection point.

[0017] In a preferred embodiment of the present invention, the second cavity includes a segment B facing the seal and a segment A facing away from the seal; segment A is tapered, and the inner diameter of the end of segment A facing the seal is smaller than the inner diameter of the end of segment A facing away from the seal. The tapering of segment A is adapted to the head of the Luer connector syringe, achieving a sealing effect between the two, preventing leakage at the connection between the connector and the Luer connector syringe, and avoiding contamination of the medication.

[0018] In a preferred embodiment of the present invention, the first connector and the second connector are threaded together. This threaded connection not only facilitates disassembly and use but also reduces manufacturing difficulty and costs. Specifically, the end of the first connector facing the second connector has a first internal thread.

[0019] The second connector has a second external thread on the exterior portion facing the first connector.

[0020] The first internal thread engages with the second external thread to connect the first connector and the second connector.

[0021] Inside the first connector, a limiting step is provided between the first internal thread and the seal.

[0022] The second connector has a limiting protrusion on its outer side, at the end facing the first connector.

[0023] When the first connector is connected to the second connector, the limiting protrusion contacts the limiting step.

[0024] The design includes a limiting step and a limiting protrusion. When the limiting protrusion contacts the limiting step, it prevents the second connector from excessively extending into the first connector, pushing the seal out of its preset position and compromising the sealing effect. Therefore, the contact between the fiber protrusion and the limiting step serves a positioning function. To further enhance the sealing effect, it is preferable to provide a sealing groove and a sealing ring on the contact surfaces of the limiting protrusion and the limiting step, respectively.

[0025] In a preferred embodiment of the present invention, the first connector and the second connector are snap-fitted together. This snap-fit ​​method not only facilitates disassembly and use but also reduces manufacturing difficulty, thereby lowering production costs.

[0026] In a preferred embodiment of the present invention, the first connector has a snap-fit ​​groove inside the end near the second connector, and the second connector has a snap-fit ​​protrusion near the first connector. The snap-fit ​​protrusion is embedded in the snap-fit ​​groove, and the first connector is connected to the second connector.

[0027] In a preferred embodiment of the present invention, a limiting step is provided between the snap-fit ​​groove and the sealing member in the first connector.

[0028] In addition to the second connector, a limiting protrusion is provided at one end of the second connector near the first connector.

[0029] When the first connector is connected to the second connector, the limiting protrusion contacts the limiting step.

[0030] The design includes a limiting step and a limiting protrusion. When the limiting protrusion contacts the limiting step, it prevents the second connector from excessively extending into the first connector, pushing the seal out of its preset position and compromising the sealing effect. Therefore, the contact between the fiber protrusion and the limiting step serves a positioning function. To further enhance the sealing effect, it is preferable to provide a sealing groove and a sealing ring on the contact surfaces of the limiting protrusion and the limiting step, respectively.

[0031] In a preferred embodiment of the present invention, a first protective cover is further included, which is used to protect the end of the connector that is connected to the needle. When the connector is not in use, connecting the first protective cover to the outlet end of the connector can effectively protect the connection point with the needle from damage.

[0032] In a preferred embodiment of the present invention, a second protective cap is further included. The second protective cap is used to protect the end of the connector that is connected to the syringe. Connecting the second protective cap to the inlet end of the connector can effectively protect the connection point with the syringe from damage.

[0033] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0034] The syringe connector solves the technical problem of mismatch between syringes and needles. The connector's inlet and outlet ends mate with the syringe, and a flow channel connecting the inlet and outlet is provided within the connector. A seal is placed within this flow channel, isolating the flow channel into an inlet and an outlet channel to ensure the connector is leak-proof. When the connector is connected to the needle, the needle passes through the seal, extends into the inlet channel, and then into the head of the syringe connector, thus connecting the drug delivery channels. Therefore, the syringe connector provided by this invention achieves a stable connection between the syringe and a needle that is incompatible with the syringe.

[0035] Furthermore, regarding the Luer connector syringe and insulin needle, the syringe connector of this invention uses an inlet end that connects to the Luer connector of the syringe via a Luer connection, and an outlet end that connects to the insulin needle via a threaded connection. This ensures a stable connection between the Luer connector syringe and the insulin needle without leakage. This allows clinicians to first connect a standard, thicker sterile injection needle to the Luer connector syringe when injecting insulin using a standard Luer connector syringe for easy medication extraction. After extraction, a different syringe connector is used to connect the thinner insulin needle to the Luer connector syringe before insulin injection, thus reducing pain for the recipient and minimizing treatment discomfort.

[0036] Secondly, a syringe connector would allow existing Luer connector syringes and insulin needles to be used together without altering their original structure. Therefore, to reduce patient pain during injection, existing Luer connector syringes and insulin needles can be utilized instead of being replaced by new products, thus avoiding waste. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the manufacturing process of a syringe connector according to Embodiment 1 of the present invention. Figure 1 .

[0038] Figure 2 This is a schematic diagram of the manufacturing process of a syringe connector according to Embodiment 1 of the present invention. Figure 2 .

[0039] Figure 3 This is a schematic diagram of the manufacturing process of a syringe connector according to Embodiment 1 of the present invention. Figure 3 .

[0040] Figure 4 This is a schematic diagram of the packaging and transportation of a syringe connector according to Embodiment 1 of the present invention.

[0041] Figure 5 This is a schematic diagram of the structure of a syringe connector in use according to Embodiment 1 of the present invention.

[0042] Figure 6 This is an exploded structural diagram of a syringe connector in Embodiment 2 of the present invention.

[0043] Figure 7 This is a schematic diagram of the structure of a syringe connector in Embodiment 2 of the present invention.

[0044] Figure 8 This is a schematic diagram of the structure of a syringe connector in use according to Embodiment 2 of the present invention.

[0045] Figure 9 This is an exploded structural diagram of a syringe connector according to Embodiment 3 of the present invention.

[0046] Figure 10 This is a schematic diagram of the structure of a syringe connector in Embodiment 3 of the present invention.

[0047] Figure 11 This is a schematic diagram of the structure of a syringe connector in use according to Embodiment 3 of the present invention.

[0048] Explanation of reference numerals in the attached drawings: 1-Main body, 2-First Luer connector, 3-First external thread, 4-Flow channel, 5-Seal, 6-Inlet channel, 7-Outlet channel, 11-First connector, 12-Second connector, 13-Limiting step, 14-Limiting protrusion, 15-First protective cover, 16-Second protective cover, 17-Luer connector syringe, 18-Insulin needle, 111-First cavity, 112-First internal thread, 113-Snap-fit ​​groove, 121-Second cavity, 122-Second external thread, 123-Snap-fit ​​protrusion. Detailed Implementation

[0049] The syringe connector proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description.

[0050] This invention addresses the problem of incompatible syringe and needle connections by proposing a syringe connector comprising a main body with an inlet at one end and an outlet at the other. The inlet connects to the syringe, and the outlet connects to the needle. The main body contains a flow channel with both ends communicating, and a seal is placed within the flow channel, dividing the flow channel into an inlet and an outlet channel to ensure the connector is leak-proof. When the connector is connected to the needle, the needle passes through the seal, extends into the inlet channel, and then into the head of the syringe connector, thereby connecting the liquid delivery channels. Therefore, the syringe connector provided by this invention achieves a stable connection between a syringe and a needle that is incompatible with the syringe.

[0051] Specifically addressing the mismatch between the insulin needle and the Luer connector syringe, the following embodiments illustrate the connection between the insulin needle and the Luer connector syringe.

[0052] Example 1

[0053] Reference Figures 1 to 5 A syringe connector includes a body 1, which is made of a deformable material such as rubber or plastic, for example, PC. The body 1 can take various shapes, as long as both ends are cylindrical. A common design is that the body 1 is entirely tubular.

[0054] The main body 1 has an inlet end and an outlet end. The inlet end is provided with a first Luer connector 2, which is used to connect to a Luer connector syringe 17, and the connection between the two is a Luer connection. The outlet end is provided with a first external thread 3, which is used to connect to an insulin needle 18, and the connection between the two is a threaded connection.

[0055] The main body 1 has a flow channel 4 with two ends connected inside, and a sealing element 5 is placed inside the flow channel 4; the sealing element 5 divides the flow channel 4 into an inlet channel 6 and an outlet channel 7.

[0056] The inlet channel 6 includes section B facing the seal 5 and section A facing away from the seal 5; section A is tapered, and the inner diameter of the end of section A facing the seal 5 is smaller than the inner diameter of the end of section A facing away from the seal 5. Furthermore, the tapered shape of section A is compatible with the head of the Luer connector syringe 17. Section B can be arbitrarily set, as long as section B cooperates with the seal 5 and achieves a sealing effect.

[0057] Reference Figure 5 When the Luer connector syringe 17 is connected to the main body 1 via the Luer connector, the head of the Luer connector syringe 17 is housed in section A, and the Luer connection prevents the internal medication from leaking out from the connection point, thus preventing contamination of the medication. At the same time, the taper of section A matches the head of the Luer connector syringe 17 to achieve a second layer of sealing and leak-proof effect.

[0058] When the insulin needle 18 is connected to the main body 1 via a threaded connection, one end of the insulin needle 18 passes through the seal 5 and extends into the head of the Luer connector syringe 17, thereby connecting the drug channel. The seal 5 also serves to seal the connection, preventing the internal drug from leaking out of the connection and thus preventing the drug from being contaminated.

[0059] Therefore, the Luer connector syringe 17 achieves a stable connection with the insulin needle 18 through a syringe connector as a carrier. This allows doctors to first use a standard sterile injection needle, Luer connected to the syringe 17, to draw medication in the clinical setting. Then, the standard sterile injection needle is removed, replaced with the syringe connector, and connected to the insulin needle 18 before administering the injection to the patient. Because the insulin needle 18 is used, the injection reduces pain and provides a more comfortable medical experience for the patient.

[0060] Reference Figure 4 A syringe connector also includes a first protective cap 15 and a second protective cap 16.

[0061] The inner wall of the first protective cover 15 is provided with a second internal thread, which is threadedly connected to the first external thread 3.

[0062] The inner wall of the second protective cover 16 is provided with a second Luer connector, which is Luer connected to the first Luer connector 2.

[0063] In a syringe connector, during packaging and transportation, both the first protective cap 15 and the second protective cap 16 are connected to the main body 1. This not only prevents contaminants from entering the flow channel 4 and ensuring that the liquid medicine is not contaminated, but also protects the first external thread 3 and the first Luer connector 2 from direct collision with external objects, avoiding damage.

[0064] Reference Figures 1 to 3 Since the main body 1 in this scheme is a one-piece structure, during the production process, before processing the outlet end, the sealing element 5 needs to be placed inside the outlet end, and then the outlet end is bent. This can be done through processes such as heat deformation bending, cold pressing bending, or extrusion bending, thereby fixing the sealing element 5 to the outlet end. Finally, the outer end face of the outlet end is threaded to form the first external thread 3.

[0065] Example 2

[0066] Reference Figures 6 to 8 A syringe connector includes a body 1, with a flow channel 4 communicating at both ends inside the body 1. One end of the body 1 is an inlet end, and the other end is an outlet end.

[0067] The main body 1 includes a first connector 11 and a second connector 12. Both the first connector 11 and the second connector 12 are made of deformable materials such as rubber or plastic, for example, PC. The shapes of the first connector 11 and the second connector 12 can be various, as long as both ends are cylindrical. A common design is for both the first connector 11 and the second connector 12 to be tubular structures.

[0068] The first connector 11 has a first internal thread 112 at one end facing the second connector 12; the other end of the first connector 11 has a first external thread 3, and this end is the outlet end. The first connector 11 has a first cavity 111 with two communicating ends, and a sealing element 5 is placed inside the first cavity 111; a limiting step 13 is provided between the first internal thread 112 and the sealing element 5, and the limiting step 13 is located inside the first connector 11.

[0069] The second connector 12 has a limiting protrusion 14 at one end facing the first connector 11, and the limiting protrusion 14 is located outside the second connector 12. The other end of the second connector 12 has a first Luer connector 2, which is located outside the second connector 12 and is the inlet end. A second external thread 122 is provided between the limiting protrusion 14 and the first Luer connector 2. The second connector 12 has a second cavity 121 with two communicating ends. The second cavity 121 includes a section B facing the seal 5 and a section A away from the seal 5; section A is conical, and the inner diameter of the section A facing the seal 5 is smaller than the inner diameter of the section A away from the seal 5.

[0070] When the first internal thread 112 engages with the second external thread 122, the first connecting member 11 and the second connecting member 12 form the main body 1, and the first cavity 111 and the second cavity 121 combine to form the flow channel 4. At this time, the end face of the second connecting member 12 extends into the first connecting member 11 and contacts the sealing member 5 (see reference). Figure 7 Furthermore, the seal 5 divides the flow channel 4 into an inlet channel 6 and an outlet channel 7. The threaded connection method is not only convenient to disassemble and use, but also has lower production difficulty, which can reduce production costs.

[0071] Furthermore, at this time, the limiting protrusion 14 contacts the limiting step 13, which can prevent the second connecting member 12 from excessively extending into the first connecting member 11 and pushing the sealing member 5 out of the preset position, thus compromising the sealing effect. Therefore, the contact between the limiting protrusion 14 and the limiting step 13 can serve a positioning function. To further enhance the sealing effect, a sealing groove and a sealing ring (not shown in the figure) can also be provided on the contact surface between the limiting protrusion 14 and the limiting step 13.

[0072] Reference Figure 8 When the Luer connector syringe 17 is connected to the main body 1 via the Luer connector, the head of the Luer connector syringe 17 is housed in section A, and the Luer connection prevents the internal medication from leaking out from the connection point, thus preventing contamination of the medication. At the same time, the taper of section A matches the head of the Luer connector syringe 17 to achieve a second layer of sealing, leak-proof, and contamination-proof effect.

[0073] When the insulin needle 18 is connected to the main body 1 via a threaded connection, one end of the insulin needle 18 passes through the seal 5 and extends into the head of the Luer connector syringe 17, thereby connecting the drug channel. The seal 5 also serves to seal the connection, preventing the internal drug from leaking out of the connection and thus preventing the drug from being contaminated.

[0074] Therefore, the Luer connector syringe 17 achieves a stable connection with the insulin needle 18 through a syringe connector as a carrier. This allows doctors to first use a standard sterile injection needle, Luer connected to the syringe 17, to draw insulin in the clinical setting. Then, the standard sterile injection needle is removed, replaced with the syringe connector, and connected to the insulin needle 18 before administering the injection to the patient. Because the insulin needle 18 is used, the injection reduces pain and provides a more comfortable medical experience for the patient.

[0075] The syringe connector may also include a first protective cap 15 and a second protective cap 16.

[0076] The inner wall of the first protective cover 15 is provided with a second internal thread, which is threadedly connected to the first external thread 3. When the connector is not in use or during packaging or transportation, the threaded connection between the first protective cover 15 and the first external thread 3 can effectively protect the first external thread 3 from damage and prevent the interior of the connector from being contaminated by pollutants entering from the outlet end.

[0077] The inner wall of the second protective cover 16 is provided with a second Luer connector, which is Luer connected to the first Luer connector 2. When the connector is not in use or during packaging or transportation, connecting the second protective cover 16 to the first Luer connector 2 can effectively protect the first Luer connector 2 from damage and prevent the interior of the connector from being contaminated by contaminants entering from the inlet end.

[0078] Example 3

[0079] Reference Figures 9 to 11 The difference between this embodiment and embodiment 2 is that the connection method between the first connector 11 and the second connector 12 is changed from a threaded connection to a snap-fit ​​connection. Of course, there are many ways to implement a snap-fit ​​connection; in this embodiment, a snap-fit ​​groove and a snap-fit ​​boss are used.

[0080] Specifically: the first connector 11 has a snap-fit ​​groove 113 inside one end facing the second connector 12, and a first external thread 3 on the outside of the other end, and a sealing element 5 inside; a limiting step 13 is provided between the snap-fit ​​groove 113 and the sealing element 5, and is located inside the first connector 11;

[0081] The second connector 12 has a limiting protrusion 14 at one end facing the first connector 11, and the limiting protrusion 14 is located outside the second connector 12. The other end of the second connector 12 has a first Luer connector 2, and the first Luer connector 2 is located outside the second connector 12; a snap-fit ​​protrusion 123 is provided between the limiting protrusion 14 and the first Luer connector 2, and the snap-fit ​​protrusion 123 is located outside the second connector 12.

[0082] During assembly, the end of the second connector 12 facing the first connector 11 is forcefully pressed into the first connector 11. Utilizing the deformable nature of plastic or rubber, the end of the first connector 11 facing the second connector 12 is pushed open, allowing the snap-fit ​​protrusion 123 to engage within the snap-fit ​​groove 113. At this point, the first connector 11 and the second connector 12 are connected. The first connector 11 and the second connector 12 form the main body 1 through this snap-fit ​​connection. This snap-fit ​​method is not only convenient to disassemble and use, but also reduces production difficulty and costs.

[0083] The rest are the same as in Example 2, so they will not be described again.

[0084] Insulin is administered subcutaneously, preferably using a 1ml syringe to ensure accurate dosage. In a clinical setting, doctors can first draw insulin using a standard sterile needle connected to a Luer connector syringe. Then, the standard sterile needle is removed, replaced with the syringe connector, and connected to the insulin needle before administering the injection to the patient.

[0085] When injecting insulin, choose subcutaneous tissue free of blood vessels and nerves to avoid injecting into the muscle layer. Draw the medication in the order of short-acting insulin first, then intermediate- and long-acting insulin, mix well, and then inject.

[0086] Insulin injections are typically administered in the abdomen, the outer third of the upper arm, the upper third of the outer thighs, and the upper outer sides of the buttocks. The injection site must be changed each time, and the same site should not be injected twice within a month to prevent local subcutaneous fat atrophy and hardening. Additionally, since exercise accelerates insulin absorption, injection sites should be avoided. Insulin absorption decreases from the abdomen, upper arm, thigh to the buttocks. Different types of insulin have different effects, so the absorption rate varies at different injection sites. Patients need to inject according to their individual circumstances and under the guidance of a doctor. Ultra-short-acting insulin analogs are not affected by the injection site and can be injected at any site. Short-acting insulin should be injected in the abdomen for the fastest absorption. Intermediate- and long-acting insulin and long-acting insulin analogs are recommended for injection in the thigh or buttocks for slower absorption. Premixed human insulin and premixed insulin analogs are recommended for injection in the abdomen before breakfast to accelerate absorption and lower post-breakfast blood sugar, and for injection in the thigh or buttocks before dinner to delay absorption and prevent nocturnal hypoglycemia.

[0087] Due to the special nature of insulin needles, they can be used not only for injecting insulin but also for injecting other liquids, and as cosmetic needles, for example:

[0088] Ophthalmology patients often require subcutaneous injection of compound camphor-willow alkaloid injection near the superficial temporal artery to treat ischemic optic neuropathy, retinal disease, choroidal disease, and oculomotor palsy. The compound camphor-willow alkaloid injection is available in 2ml vials, and is clinically administered using disposable 2ml syringes. However, these syringes use size 6 needles, which, due to their thick needle shaft and thin subcutaneous tissue near the superficial temporal artery, often cause significant pain and complications such as subcutaneous hematoma and small hematomas at the injection site. Using insulin needles can reduce patient pain and discomfort, ensure patient safety, and lower the risks of the procedure. However, the insulin needle and the Luer connector of the 2ml syringe cannot be directly connected; a syringe connector can be used as a carrier to connect the insulin needle and the 2ml syringe.

[0089] In cosmetic medicine, facial hyaluronic acid injections are performed using pre-filled hyaluronic acid syringes, typically equipped with 13mm needles (27G / 30G). The injection depth is generally around 2 to 3 millimeters. Maintaining the correct injection depth is crucial. Injecting too deeply may cause swelling, capillary rupture, and bleeding at the injection site. Injecting too shallowly will not achieve the desired therapeutic effect, and the skin will not absorb the nutrients. Doctors can choose different injection depths based on individual skin conditions. Different insulin needles are connected via syringe connectors to control the injection depth. With the appropriate needle selected, it is usually not necessary to pinch the skin during injection; a 90-degree angle is sufficient. Syringe connectors allow doctors to choose from a variety of needle types, enabling personalized treatment and improving the patient experience.

[0090] The above embodiments elaborate on the connection between the syringe and the insulin needle to address the mismatch between the Luer connector syringe and the insulin needle. Of course, the connector and syringe can also be connected in other ways besides the Luer connection, such as a conical connector; this is not a limitation here. Similarly, the connector and needle can also be connected in other ways besides the threaded connection of the insulin needle; this is also not a limitation here.

[0091] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A syringe connector, characterized in that, The device includes a main body, one end of which is an inlet and the other end is connected to an outlet. The inlet is connected to the syringe and the outlet is connected to the needle. The main body has a flow channel with two communicating ends. The flow channel contains a sealing element, and the sealing element divides the flow channel into an inlet channel and an outlet channel. The inlet end is provided with a first Luer connector for connecting the syringe, and the outlet end is provided with a first external thread for connecting the insulin needle; The inlet channel includes a section B facing the seal and a section A facing away from the seal; section A is tapered, and the inner diameter of the end of section A facing the seal is smaller than the inner diameter of the end of section A facing away from the seal, so as to form a double seal with the cone-shaped head surface of the Luer connector syringe. After the connector is threadedly connected to the insulin needle, the needle of the insulin needle passes through the seal, extends into the inlet channel, and communicates with the head of the Luer connector syringe, so that the liquid in the syringe flows into the insulin needle.

2. The syringe connector according to claim 1, characterized in that, The main body includes a first connector and a second connector, which are detachably connected. The first connector has a first cavity with two communicating ends, and the second connector has a second cavity with two communicating ends. When the first connector and the second connector are connected, the first cavity and the second cavity combine to form the flow channel.

3. The syringe connector according to claim 2, characterized in that, The sealing element is located in the first cavity. When the first connector and the second connector are connected, the end face of the second connector facing the first connector contacts the sealing element.

4. The syringe connector according to claim 3, characterized in that, The second cavity includes a section B facing the seal and a section A facing away from the seal; section A is tapered, and the inner diameter of the end of section A facing the seal is smaller than the inner diameter of the end of section A facing away from the seal.

5. The syringe connector according to claim 2, characterized in that, The end of the first connector facing the second connector has a first internal thread. The second connector has a second external thread on the exterior portion facing the first connector. The first internal thread engages with the second external thread to connect the first connector and the second connector.

6. The syringe connector according to claim 5, characterized in that, Inside the first connector, a limiting step is provided between the first internal thread and the seal. The second connector has a limiting protrusion on its outer side, at the end facing the first connector. When the first connector is connected to the second connector, the limiting protrusion contacts the limiting step.

7. The syringe connector according to claim 6, characterized in that, The contact surfaces of the limiting protrusion and the limiting step are respectively provided with a sealing groove and a sealing ring.

8. The syringe connector according to claim 2, characterized in that, The first connector and the second connector are snapped together.

9. The syringe connector according to claim 8, characterized in that, The first connector has a snap-fit ​​groove inside at the end near the second connector. The second connector has a snap-fit ​​protrusion on the exterior of its portion facing the first connector. The snap-fit ​​protrusion is embedded in the snap-fit ​​groove, and the first connector is connected to the second connector.

10. The syringe connector according to claim 9, characterized in that, Within the first connector, a limiting step is provided between the snap-fit ​​groove and the sealing element. In addition to the second connector, a limiting protrusion is provided at the end of the second connector facing the first connector. When the first connector is connected to the second connector, the limiting protrusion contacts the limiting step.

11. The syringe connector according to claim 10, characterized in that, The contact surfaces of the limiting protrusion and the limiting step are respectively provided with a sealing groove and a sealing ring.

12. The syringe connector according to claim 1, characterized in that, It also includes a first protective cover, which is used to protect the end of the connector that is connected to the needle.

13. The syringe connector according to claim 1, characterized in that, It also includes a second protective cap, which is used to protect the end of the connector that is connected to the syringe.

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