Medical plug connector quadrilateral terminal

Abstract

A medical plug connector quadrilateral terminal, through the compact layout of the quadrilateral press-fit port, improves the space utilization of the circuit board, and the double independent bearing surfaces of the concave area of the connecting table are physically isolated from the wire welding points, ensuring the medical-grade creepage distance and electrical clearance, the double-pressing piece overlapping structure of the press-fit port enhances the stability of the elastic contact, effectively resisting vibration and preventing instantaneous breakage, the V-shaped clamping piece of the clamping port cooperates with the toothed pattern to provide adaptive clamping force, high-frequency plugging resistance and cable pulling resistance, the one-piece structure eliminates the welding weak point, improves the corrosion resistance to disinfectants, and the asymmetric quadrilateral and rounded rectangular port forms a physical foolproof mechanism, combined with elastic engagement instead of threaded locking, significantly reduces the misplug rate and loosening risk, and comprehensively solves the problem that the space utilization and electrical safety cannot be considered in the prior art.

Description

Technical Field

[0001] This article belongs to the field of electronic connector technology applied to medical electronics technology, specifically involving a medical plug connector with quadrilateral terminals. Background Technology

[0002] Medical connectors are core components for the electrical interconnection of medical devices. Their performance directly affects the accuracy of medical diagnosis and the safety of treatment. However, existing mainstream medical connector terminals have significant shortcomings in meeting the stringent requirements of medical scenarios. These requirements are mainly reflected in the following aspects: Reliability of life support and monitoring: Connectors used in devices such as electrocardiographs, defibrillators, and multi-parameter monitors must transmit critical physiological signals from patients in real time with high fidelity. Terminal contact stability is crucial; any fluctuation in contact resistance or signal distortion may lead to misdiagnosis or delay in treatment. Strict electrical safety: Medical devices must meet extremely high safety standards, requiring terminals and their structural design to provide double insulation, high withstand voltage, and sufficient creepage distance and clearance to prevent high-voltage breakdown or electric shock risks. High-frequency operation and tolerance to harsh environments: Medical connectors must withstand multiple insertion and removal operations daily and resist repeated corrosion from disinfectants such as alcohol and ethylene oxide. Therefore, terminal materials must possess excellent biocompatibility, chemical corrosion resistance, and a sufficiently long mechanical life to ensure the basic reliability of the equipment for long-term use.

[0003] Current mainstream terminal designs have several inherent defects and risks. Structurally, the widely adopted circular multi-pin terminal layout has low space utilization, requiring large circumferential spacing to ensure insulation strength, thus encroaching on valuable circuit board space. Furthermore, in pursuit of miniaturization, general designs often fail to meet medical-grade creepage distance and clearance requirements. While attempts to compensate by lengthening the insulating collar have been made, this sacrifices effective contact area. Regarding electrical and mechanical reliability, existing press-fit terminals generally employ a single-point elastic contact design, which is prone to momentary breakage under equipment vibration or cable tension. The solder joints between the wire and terminal are exposed to stress concentration areas, and repeated bending easily leads to fatigue fracture. Although circular terminals allow for multi-angle insertion, high-frequency insertion and removal can easily cause pin bending or plastic base cracking due to misalignment and rotation. In terms of connection maintenance and error prevention mechanisms, traditional threaded fastening operations are cumbersome and the threads are prone to wear and failure. Pure plug-in connections are prone to loosening under vibration, potentially causing treatment interruption. The high similarity in interface shapes between different functional connectors increases the risk of mis-insertion. Although ISO... Standards such as 80369 have attempted to improve physical error prevention, but the problem of mis-insertion of electrical terminals themselves has not been fundamentally solved.

[0004] Existing optimization solutions for these defects have significant limitations and introduce new contradictions. Hybrid connectors aim to reduce insertion / removal and misconnection, but their complex cavities severely encroach on electrical terminal layout space, forcing terminal miniaturization that makes it difficult to meet medical-grade insulation thickness requirements. Furthermore, the risk of fluid leakage directly threatens electrical safety. While elastic snap-locking replaces threaded locking for easier quick insertion / removal, its snap-locking arms require sacrificing terminal body space, resulting in a reduced current-carrying cross-section. Moreover, the snap-locking elastic material is prone to embrittlement and failure after repeated contact with disinfectants. High-density soldering layouts improve space utilization but reduce creepage distance between solder joints. Relying on potting compound to fill insulation carries the risk of colloid aging leading to cracks and inducing leakage in high-humidity environments. Excessive miniaturization to adapt to wearable devices... Insufficient current-carrying capacity and the increased susceptibility of delicate elastic contacts to failure under the influence of bodily fluids are common problems in medical connector terminal design. Therefore, medical terminal design has always faced a difficult balance between structural strength, electrical safety, and connection density. Existing solutions often compromise on one aspect while sacrificing another: sacrificing space for safe spacing, or compromising insulation reliability for miniaturization. Especially in space-efficient solutions such as quadrilateral terminals, current technologies have not effectively addressed key issues such as the integrated pressing and clamping functions, the construction of an integrated insulation barrier, and the optimization of tensile strength. Therefore, the industry urgently needs an innovative medical connector terminal design that can significantly improve terminal space layout efficiency, mechanical lifespan, and overall connection reliability while strictly maintaining medical-grade electrical safety standards. Utility Model Content

[0005] This invention addresses the problems of low space utilization, insufficient electrical safety, poor mechanical reliability, and weak anti-misinsertion mechanism in existing medical connector terminals. It proposes a quadrilateral terminal for a medical plug connector, which optimizes the space layout and strengthens insulation protection through an integrated pressing and clamping dual-function design.

[0006] A medical plug connector with quadrilateral terminals includes a crimping port, a clamping port, and a connecting platform;

[0007] The crimping port is located on the left side of the terminal and includes a long strip-shaped quadrilateral bottom connector and two rectangular pressure plates. The long strip-shaped quadrilateral bottom connector provides a stable crimping base, while the two rectangular pressure plates are used to wrap and fix the wire or component to be crimped.

[0008] Two pressure plates extend upward from the upper edges of the two opposite sides of the quadrilateral bottom connector. One pressure plate partially covers the upper surface of the other pressure plate. The overlapping design significantly increases the wrapping area and contact pressure of the pressure plates on the wires or components, thereby improving the firmness, conductivity and vibration resistance of the press-fit connection.

[0009] The clamping port is located on the right side of the terminal and includes an arc-shaped bottom connector with a rounded rectangular cross-section and two rectangular clamping plates. The arc-shaped bottom connector can better accommodate and guide the insertion of mating pin-shaped or post-shaped terminals, while the two rectangular clamping plates are responsible for providing the necessary clamping force to achieve reliable electrical contact.

[0010] Two clamping plates extend upward from the upper edges of the two long sides of the arc-shaped bottom connector. This extension method ensures that the clamping force is evenly distributed, which is beneficial for the centering and stable clamping of the mating terminal.

[0011] The connecting platform is a sheet-like rectangular structure located between the crimping port and the clamping port. Its front end connects to the rear end of the quadrilateral bottom connector, and its rear end connects to the rear end of the arc-shaped bottom connector. The connecting platform has a recessed area in the middle. The connecting platform not only firmly bridges the crimping port and the clamping port to ensure the overall structural strength, but the recessed area in the middle also provides additional space and structural features, which facilitates the positioning and fixing of the ends of the wires and conductors.

[0012] When viewed from the side, the two clamping plates at the clamping port form an outward-opening V-shaped structure in their natural state. This design creates a natural guide entrance, allowing the mating terminals to be inserted more easily and smoothly, reducing insertion force and facilitating operation.

[0013] The crimping port, clamping port, and connecting platform are made of conductive material in one piece. The one-piece molding process ensures that the overall structure of the terminal has high strength, low resistance, and stable and reliable electrical performance. At the same time, it avoids potential poor contact or failure points caused by assembly, and has good mechanical durability. It can also effectively prevent body fluids from seeping into the connection gap.

[0014] The pressure plate has elastic deformation capability. In the pressed state, it is on the same plane as the quadrilateral bottom connector. The elasticity of the pressure plate allows it to tightly wrap and continuously press the wires or components during the pressing process, ensuring low resistance and high reliability of electrical connection. After pressing, it is flush with the bottom connector, which makes the terminal shape regular, facilitates installation and avoids stress concentration.

[0015] The recessed area includes independent upper and lower bearing surfaces. The upper bearing surface is used to fix the end of the conductor bar, and the lower bearing surface is used to fix the end of the metal conductor of the wire. The independent and functionally defined upper and lower bearing surfaces allow the metal conductor of the wire and the end of the conductor bar to be precisely positioned and fixed in their respective dedicated positions, preventing them from interfering with each other, ensuring that their respective connections are reliable and facilitating welding or crimping operations.

[0016] The inner surface of the clip is provided with an interlocking toothed structure. The interlocking toothed structure can effectively pierce the oxide layer on the surface of the mating terminal, increase the number of contact points and contact pressure, significantly reduce contact resistance, improve conductivity and long-term stability of connection, and enhance resistance to fretting wear and vibration.

[0017] The upper and lower bearing surfaces are set parallel to each other. This parallel setting ensures that the conductor ends and the metal conductor ends of the wires are subjected to uniform force and consistent direction when fixed. This is beneficial for the process control of welding or crimping, improves the consistency and reliability of the connection, and makes the terminal structure more compact and regular.

[0018] Beneficial effects:

[0019] This paper improves the space utilization of the circuit board through the compact layout of the quadrilateral crimping port. At the same time, the dual independent bearing surfaces in the recessed area of ​​the connector physically isolate the conductor and wire solder joints, ensuring medical-grade creepage distance and electrical clearance. The double-pressing overlapping structure of the crimping port enhances the elastic contact stability, effectively resisting vibration and preventing instantaneous breakage. The V-shaped clamping piece of the clamping port, combined with the interlocking teeth, provides adaptive clamping force, resisting high-frequency insertion and removal and cable pulling. The one-piece molded structure eliminates weak points in the soldering and improves the resistance to disinfectant corrosion. The asymmetrical quadrilateral and rounded rectangular port shapes form a physical foolproof mechanism. Combined with elastic interlocking to replace threaded locking, it significantly reduces the misinsertion rate and the risk of loosening. This comprehensively solves the problem of balancing space utilization and electrical safety in existing technologies. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the appearance of a quadrilateral terminal of a medical plug connector.

[0021] Figure 2 This is a schematic diagram of the connection of the quadrilateral terminals of a medical plug connector.

[0022] Figure 3 This is a side view of the quadrilateral terminals of a medical plug connector.

[0023] In the diagram: 1. Pressing port, 101. Pressing plate, 2. Clamping port, 201. Clamping plate, 3. Connecting platform, 4. Guide rail, 5. Wire. Detailed Implementation

[0024] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0025] Pressing port 1, pressing plate 101, clamping port 2, clamping plate 201, connecting platform 3, guide rail 4, wire 5.

[0026] like Figure 1 , 2 As shown in Figure 3

[0027] A medical plug connector with quadrilateral terminals, integrally molded from conductive material, includes a crimping port 1, a clamping port 2, and a connecting platform 3.

[0028] Pressing port 1: Located on the left side of the terminal, its main body is a long strip-shaped quadrilateral bottom connector. Two rectangular pressing plates 101 extend upward from the upper edge of the two opposite sides of the bottom connector. One pressing plate 101 partially covers the upper surface of the other pressing plate 101. The pressing plate 101 has elastic deformation capability and can be in the same plane as the quadrilateral bottom connector in the pressing state.

[0029] Clamping port 2: Located on the right side of the terminal, its main body is an arc-shaped bottom connector with a rounded rectangular cross-section. Two rectangular clamping pieces 201 extend upward from the upper edge of the two long sides of the arc-shaped bottom connector. When viewed from the side in its natural state, the two clamping pieces 201 have an outwardly opening V-shaped structure, and their inner surfaces are provided with interlocking tooth patterns.

[0030] Connecting platform 3: It is a sheet-shaped rectangular structure located between pressing port 1 and clamping port 2. Its front end is connected to the rear end of the quadrilateral bottom connector, and its rear end is connected to the rear end of the arc-shaped bottom connector. The middle part of the connecting platform 3 has a recessed area, which includes independent upper bearing surface and lower bearing surface arranged parallel to each other. The upper bearing surface is used to fix the end of the guide rail 4, and the lower bearing surface is used to fix the end of the metal conductor of the wire 5.

[0031] Implementation Example

[0032] First, the wire 5 is pre-stripped to expose a sufficient length of metal conductor. Then, the conductor 4 is horizontally inserted from the front end of the left crimping port 1, passing under the quadrilateral bottom connector and extending to the middle of the connecting platform 3. At the same time, the stripped metal end of the wire 5 is inserted from the front end of the right clamping port 2, placed between the V-shaped opening clips 201, and pushed to the middle of the connecting platform 3, so that its metal end and the end of the conductor 4 are aligned and crimped together at the connecting platform 3. Next, a special tool is used to press the overlapping clips 101 of the crimping port 1 flat, so that the crimping port 1 and the conductor 4 are fused to form a continuous whole. Finally, the V-shaped clips 201 of the clamping port 2 are clamped inward with a tool, and the inner interlocking teeth are used to embed and cover the metal core of the wire 5, forming a tight whole structure. After the operation, the conductivity needs to be checked to ensure that the connection is reliable.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quadrilateral terminal for a medical plug connector, characterized in that, include: Press-fit port, clamp-fit ​​port, and connector; The pressing port is located on the left side of the terminal and includes a long strip-shaped quadrilateral bottom connector and two rectangular pressing plates; The two pressure plates extend upward from the upper edges of the two opposite sides of the quadrilateral bottom connector, with one pressure plate partially covering the upper surface of the other pressure plate. The clamping port is located on the right side of the terminal and includes an arc-shaped bottom connector with a rounded rectangular cross-section and two rectangular clamping pieces; The two clips extend upward from the upper edges of the two long sides of the arc-shaped bottom connector, respectively; The connecting platform is a sheet-shaped rectangular structure located between the pressing port and the clamping port. Its front end is connected to the rear end of the quadrilateral bottom connector, and its rear end is connected to the rear end of the arc-shaped bottom connector. A recessed area is provided in the middle of the connecting platform. The recessed area includes an independent upper bearing surface and a lower bearing surface, which are arranged parallel to each other. The upper bearing surface is used to fix the end of the conductor, and the lower bearing surface is used to fix the end of the metal conductor of the wire.

2. The quadrilateral terminal of a medical plug connector according to claim 1, characterized in that: The two clamping plates at the clamping port, when viewed from the side in their natural state, form an outward-opening V-shaped structure.

3. The quadrilateral terminal of a medical plug connector according to claim 1, characterized in that: The pressing port, clamping port, and connecting platform are integrally molded from conductive material.

4. The quadrilateral terminal of a medical plug connector according to claim 1, characterized in that: The press plate has elastic deformation capability and is in the same plane as the quadrilateral bottom connector when pressed.

5. The quadrilateral terminal of a medical plug connector according to claim 1, characterized in that: The inner surface of the clip is provided with an interlocking tooth pattern.

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