A luer lock device

Abstract

The utility model relates to medical instrument technical field discloses a luer anti-loosening device, including luer joint and luer protection cap, luer joint includes male luer joint and female luer joint, male luer joint and female luer joint are equipped with recess and recess respectively, luer protection cap is equipped with the rib of protruding in, luer protection cap bottom is equipped with the boss to the inside, luer protection cap is circular or oval. The utility model greatly improved the security and reliability of connection, effectively put an end to accidental loosening risk, provided additional shrinkage mechanism, through the rib in luer protection cap and the boss of bottom, prevent threaded connection in dynamic reverse direction rotation, realized the convenience and repeatability of operation, and the operation mode is simple and convenient, through the luer protection cap sleeve is taken down and can realize luer's multiple connection and disconnect, greatly guaranteed the operation efficiency and repeatability, greatly improved the reliability and market promotion prospect of luer.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a Luer anti-loosening device. Background Technology

[0002] The Luer connector is a standard for small fluid connectors widely used in medical, laboratory, and analytical instruments. It was first invented by the German instrument manufacturer Hermann Wülfing Luer in the late 19th century and became a global standard (ISO 80369 series and earlier ISO 594 series) due to its simplicity, reliability, and versatility.

[0003] The most commonly used Luer connectors are: Luer-Lock connectors: which use a threaded mechanism for rotational locking and are designed to provide a more secure connection and prevent accidental detachment.

[0004] For Luer lock connectors: Although a threaded locking mechanism is designed, under dynamic environments such as transportation, high pressure, high-frequency vibration, or rapid temperature changes, the threaded portion may gradually loosen due to stress relaxation or slight reverse rotation. In addition, medical personnel or users may fail to fully tighten the threads during operation due to haste, slippery gloves, or insufficient force, resulting in a "false tightening" phenomenon, which poses a safety hazard for subsequent use.

[0005] Although Luer connectors have become an industry standard, a significant long-standing and unresolved defect remains in actual clinical and experimental applications: accidental loosening and leakage.

[0006] Cause of the problem: The friction-dependent nature of Luer joints limits their tensile strength. When subjected to external vibrations, pressure pulses, pipeline tension, or accidental impacts, the static friction between the conical surfaces can be easily overcome, leading to joint slippage and leakage of drugs or fluids.

[0007] The serious consequences of this problem: Unexpected loosening and leakage of the Luer joint can lead to a series of serious problems, including but not limited to: Inaccurate drug delivery can prevent patients from receiving the intended dose of medication, affecting treatment outcomes, especially in areas requiring precise drug administration such as chemotherapy, anesthesia, and ICU infusions. Environmental pollution and biohazards: Leaks of toxic, cytotoxic, or infectious drugs / fluids can contaminate the environment and endanger the safety of healthcare workers and patients. Air embolism risk: In intravascular infusion systems, leaks at connectors can allow air to enter the bloodstream, causing life-threatening air embolisms. Operational interruptions and reduced efficiency: Treatment processes need to be interrupted for cleaning and reconnection, increasing the workload of healthcare workers and reducing clinical efficiency. Sample contamination and data distortion: In laboratory settings, leaks at connectors can lead to the loss or contamination of valuable samples, resulting in distorted experimental data. To address the issue of loose Luer joints, various solutions have been proposed in the industry, but all have certain limitations: Auxiliary fixing devices: Externally securing the connection point using tape, special clips, or straps. This method increases the number of steps, is less convenient, and tape residue may remain, making it difficult to clean.

[0008] Structural improvement design: Increase thread friction: such as designing a coarser thread or a self-locking angle. This method has limited effectiveness and is prone to wear after repeated insertion and removal.

[0009] Adding a latch or ratchet mechanism: This prevents reversal by using a mechanical latch after locking. This typically makes the structure more complex, increases manufacturing costs, and may not be as simple or quick to unlock, failing to meet the rapid response requirements of medical scenarios.

[0010] O-ring seal: An elastic sealing ring is added to the conical surface. This mainly improves the sealing performance, but has limited contribution to preventing the joint from completely falling off, and increases the cost of consumables.

[0011] Integrated or bonded: This involves permanently bonding key connections or using an integrated design. This completely negates the core advantages of Luer joints—reusability and quick disassembly—resulting in extremely poor flexibility.

[0012] Existing Luer joints and their anti-loosening solutions suffer from one or more defects, such as insufficient reliability, complex structure, high cost, cumbersome operation, or sacrifice of convenience.

[0013] Therefore, the medical and industrial sectors urgently need an innovative solution that can fundamentally and effectively prevent accidental rotation and loosening of Luer connectors in dynamic environments while maintaining the advantages of standard Luer connector interfaces, quick plugging and unplugging, and low cost.

[0014] Document CN 211536208 U discloses a three-way connector for use in the extracorporeal circulation circuit of hemodialysis. It includes a short cone with a connecting portion protruding outwards from its sidewall. The connecting portion connects to a spiral connector, and a silicone sealing gasket is provided between the spiral connector and the connecting portion. A protective cap is connected to the top of the spiral connector. The connecting portion has a hollow structure with a boss in the middle, including a support portion and a protrusion on the support portion. One end of the spiral connector has a fixed cavity connected to the connecting portion. In this invention, when not in use, the periphery of the silicone sealing gasket fits against the bottom of the fixed cavity to achieve a seal. Simultaneously, the seal of the protective cap ensures a constant pressure inside the short cone, preventing liquid leakage. In use, the outer Luer connector of the infusion set / syringe replaces the protective cap and connects to the inner Luer connector. Liquid flows into the inner Luer connector and squeezes the silicone sealing gasket, causing the periphery of the silicone sealing gasket to bend towards the support portion, thus connecting the inner Luer connector, the fixed cavity, and the short cone, allowing liquid to pass through for clinical treatment. When using this type of Luer connector, there is a possibility that they may loosen from each other, which may affect the operation.

[0015] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0016] To address the aforementioned issues, this utility model discloses a Luer anti-loosening device, which resolves the inherent safety concern of Luer joints being prone to loosening. Furthermore, it brings comprehensive improvements in operational efficiency, sealing performance, and error prevention capabilities, greatly enhancing the reliability of Luer joints and their market prospects.

[0017] The technical solution of this utility model is as follows: a Luer anti-loosening device, including a Luer connector and a Luer protective cap. The Luer connector includes a male Luer connector and a female Luer connector. The male Luer connector and the female Luer connector are respectively provided with a groove and a concave surface. The Luer protective cap is provided with a protruding rib inside. The bottom of the Luer protective cap is provided with an inward protrusion. The Luer protective cap is circular or elliptical.

[0018] By adopting the above technical solution, an additional tightening mechanism is provided to prevent the threaded connection from rotating in the opposite direction dynamically, fundamentally avoiding serious medical accidents such as drug leakage, blood transfusion interruption, and air embolism caused by loosening of the joint, and providing vital protection for the patient's life.

[0019] Preferably, the male screw cap of the male Luer connector has inclined surfaces on both sides with the center as the center. Each inclined surface is an obtuse triangle, and a longitudinal groove is provided between the obtuse triangles. The groove is parallel to the height direction of the male Luer connector.

[0020] By adopting the above technical solution, the groove and inclined surface of the male Luer connector and the Luer protective cap cooperate with each other. The groove and inclined surface fit perfectly between the ribs of the Luer protective cap, increasing the contact area between the groove and inclined surface and the ribs, thereby increasing the friction between the male Luer connector and the Luer protective cap and effectively preventing the Luer connection from loosening.

[0021] Preferably, the limiting plate of the female Luer connector has a concave side, and a flat surface is provided between the concave surfaces for connection. The width of the limiting plate is adapted to the outer diameter of the male screw cap.

[0022] By adopting the above technical solution, the concave surface of the female Luer connector is easy to grip when connected with the male Luer connector, and can also generate friction with the inner rib of the Luer protective cap to prevent slippage.

[0023] Preferably, the ribs protrude from the inner surface of the Luer protective cap, the ribs connect the two ends of the Luer protective cap, and the ribs are compatible with the grooves and concave surfaces.

[0024] By adopting the above technical solution, the reinforcing bar can increase the friction between the male and female Luer joints, so that the Luer joint is inside the Luer protective cap, reducing the occurrence of displacement.

[0025] Preferably, the boss extends toward the center of the Luer protective cap, and the inner diameter of the boss is smaller than the width of the limiting plate or the male screw cap, so as to abut against the limiting plate or the male screw cap.

[0026] By adopting the above technical solution, the installation of male and female Luer joints can be quickly ensured during assembly, and the vertical movement of the Luer joints can be prevented, reducing the possibility of displacement.

[0027] Preferably, the outer side of the connecting part at the end of the tightening connecting rod of the female Luer connector is provided with a thread, and the inner side of the male screw cap is provided with an internal thread that matches the thread of the connecting part.

[0028] Preferably, the hollow inner part of the connecting rod of the female Luer connector and the limiting rod of the male Luer connector are mutually adapted for insertion.

[0029] By adopting the above technical solution, the assembly of the Luer connector is completed by screwing the connecting part of the female Luer connector into the male screw cap and inserting the limiting part of the male Luer connector into the connecting rod of the female Luer connector.

[0030] The advantages of this utility model are: 1. This utility model greatly improves the safety and reliability of the connection, effectively eliminates the risk of accidental loosening, and provides an additional tightening mechanism. Through the ribs inside the Luer protection cap and the bottom boss, the threaded connection is prevented from rotating in the opposite direction dynamically.

[0031] 2. The utility model achieves convenient and repeatable operation. The operation method is simple and convenient. By simply putting on and taking off the Luer protective cap, the Luer can be connected and disconnected multiple times, which greatly ensures the efficiency and repeatability of operation.

[0032] 3. The utility model not only solves the inherent safety problem of easy loosening of Luer joints, but also brings comprehensive improvements in operating efficiency, sealing performance and error prevention capabilities, greatly improving the reliability of Luer joints and their market prospects. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 Schematic diagram of the external structure; Figure 3 This is a schematic diagram of the structure of the Luer protective cap of this utility model; Figure 4 This is a schematic diagram of the structure of the male Luer connector of this utility model; Figure 5 This is a schematic diagram of the structure of the female Luer connector of this utility model.

[0034] Among them: 1. Male Luer connector, 101 male spiral cap, 1011 groove, 1012 inclined surface, 103 limiting rod, 2. Female Luer connector, 201 limiting plate, 2012 concave surface, 202 connecting rod, 203 connecting part, 3. Luer protective cap, 301 rib, 302 boss. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0036] like Figure 1-5 As shown, a Luer anti-loosening device includes a Luer connector and a Luer protective cap. The Luer connector is made of materials including but not limited to PC, PSU, PP, PVDF, PET, etc. The Luer connector includes a male Luer connector 1 and a female Luer connector 2. The male Luer connector 1 and the female Luer connector 2 are respectively provided with a groove 1011 and a concave surface 2012. The Luer protective cap 3 has a protruding rib 301 inside and an inward boss 302 at the bottom. The Luer protective cap 3 is circular or elliptical and is made of materials including but not limited to silicone, TPE / TPR, PVC, TPU, EPMD, fluororubber, etc. It provides an additional tightening mechanism to prevent the threaded connection from rotating in the opposite direction dynamically, fundamentally avoiding serious medical accidents such as drug leakage, blood transfusion interruption, and air embolism caused by loosening of the connector, and providing vital protection for the patient's life.

[0037] The male screw cap 101 of the male Luer connector 1 has inclined surfaces 1012 on both sides with the center as the center. Each inclined surface 1012 is an obtuse triangle. There is a longitudinal groove 1011 between the obtuse triangles. The groove 1011 is parallel to the height direction of the male Luer connector 1. The groove 1011 and the inclined surface 1012 of the male Luer connector 1 and the Luer protective cap 3 cooperate with each other. The groove and the inclined surface 1012 fit exactly between the ribs 301 of the Luer protective cap 3. The contact area between the groove 1011 and the inclined surface 1012 and the ribs 301 is increased, thereby increasing the friction between the male Luer connector 1 and the Luer protective cap 3, effectively preventing the Luer connection from loosening.

[0038] The limiting plate of the female Luer connector 2 has a concave surface 2012 on its side, and a flat surface is provided between the concave surfaces 2012 for connection. The width of the limiting plate 201 is adapted to the outer diameter of the male screw cap 3. The concave surface 2012 of the female Luer connector 2 is convenient for gripping when connected with the male Luer connector 1, and can also generate friction with the inner rib 301 of the Luer protective cap 3 to prevent slippage.

[0039] Rib 301 protrudes from the inner surface of Luer protective cap 3. Rib 301 connects the two ends of Luer protective cap 3. Rib 301 is compatible with groove 1011 and concave surface 2012. Rib 301 can increase the friction between male Luer connector 1 and female Luer connector 2, so that the Luer connector is inside Luer protective cap 3, reducing the occurrence of displacement.

[0040] The boss 302 extends toward the center of the Luer protective cap 3. The inner diameter of the boss 302 is smaller than the width of the limiting plate 201 or the male screw cap 101. It acts as abutment against the limiting plate 201 or the male screw cap 101. When the male Luer connector 1 and the female Luer connector 2 are assembled, it can quickly ensure that the installation is in place and prevent the Luer connector from moving up and down, reducing the possibility of displacement.

[0041] The female Luer connector 2 has a threaded connection on the outside of the connecting part 203 at the end of the tightening connecting rod 202, and the male screw cap 1 has an internal thread that matches the thread of the connecting part 203. The connecting rod 202 of the female Luer connector 2 is hollow inside and is matched with the limiting rod 103 of the male Luer connector 1 for insertion.

[0042] By screwing the connecting part 203 of the female Luer connector 2 into the male screw cap 101, the limiting part of the male Luer connector 101 is inserted into the connecting rod 202 of the female Luer connector 2, thus completing the assembly of the Luer connector. Then, the Luer protective cap 3 is put on the outside of the Luer connector. One side of the boss 302 of the Luer protective cap 3 can abut against the side of the female Luer connector 2 or the side of the male Luer connector 1.

[0043] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A Luer anti-loosening device, comprising a Luer connector and a Luer protective cap, wherein the Luer connector comprises a male Luer connector and a female Luer connector, characterized in that: The male and female Luer connectors are respectively provided with grooves and concave surfaces. The Luer protective cap is provided with protruding ribs inside. The bottom of the Luer protective cap is provided with an inward protrusion. The Luer protective cap is circular or elliptical.

2. The Luer anti-loosening device according to claim 1, characterized in that: The male screw cap of the male Luer connector has inclined surfaces on both sides with the center as the center. Each inclined surface is an obtuse triangle. A longitudinal groove is provided between the obtuse triangles. The groove is parallel to the height direction of the male Luer connector.

3. The Luer anti-loosening device according to claim 2, characterized in that: The limiting plate of the female Luer connector has a concave side, and a plane is provided between the concave surfaces for connection. The width of the limiting plate is adapted to the outer diameter of the male screw cap.

4. The Luer anti-loosening device according to claim 3, characterized in that: The ribs protrude from the inner surface of the Luer protective cap, the ribs connect the two ends of the Luer protective cap, and the ribs are adapted to the grooves and concave surfaces.

5. A Luer anti-loosening device according to claim 4, characterized in that: The boss extends toward the center of the Luer protective cap, and the inner diameter of the boss is smaller than the width of the limiting plate or the male screw cap, so as to abut against the limiting plate or the male screw cap.

6. The Luer anti-loosening device according to claim 2, characterized in that: The female Luer connector has a threaded connection on the outside of the connecting part at the end of the tightening connecting rod, and the male spiral cap has an internal thread that matches the thread of the connecting part.

7. A Luer anti-loosening device according to claim 6, characterized in that: The hollow interior of the connecting rod of the female Luer connector and the limiting rod of the male Luer connector are adapted to each other for insertion.

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