A multi-port radio frequency connector

Abstract

The utility model discloses a kind of multi-port radio frequency connectors, including main body shell, insulating seat, multiple radio frequency port components, quick locking mechanism and sealing structure;The main body shell is cylindrical structure of metal material, its one end is equipped with the flange plate for with external device docking, positioning hole is opened on the flange plate, annular step is equipped in the main body shell inner wall;The insulating seat is insulating material, fixed in the annular step of the main body shell by interference fit.The utility model is by being provided with shielding baffle between each radio frequency port, forms independent shielding cavity, effectively blocks the signal crosstalk between port, guarantees the stability of radio frequency signal transmission;Adopt the quick locking mechanism of elastic buckle and card slot cooperation, need not rotating operation, only need axial push to complete connection, dismounting time is greatly shortened compared with traditional screw thread structure.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency communication equipment technology, specifically a multi-port radio frequency connector. Background Technology

[0002] RF connectors are key components in RF communication systems used to connect RF cables and modules, and are widely used in communication base stations, radar equipment, and testing instruments. Currently, multi-port RF connectors commonly suffer from the following problems: 1. The dense layout of multiple ports without independent shielding structure is prone to signal crosstalk between different ports, resulting in a decrease in transmission performance; 2. The connection between the port and external devices often uses threaded locking, which requires repeated rotation during disassembly and assembly, making the operation cumbersome and inefficient.

[0003] To address the aforementioned issues, it is necessary to design a multi-port RF connector that features a reasonable layout, convenient assembly and disassembly, and excellent sealing performance to meet the usage requirements in high-frequency communication scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a multi-port radio frequency connector to solve the problems currently existing in the market as described in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-port RF connector, comprising a main body shell, an insulating base, multiple sets of RF port assemblies, a quick-locking mechanism, and a sealing structure; the main body shell is a cylindrical structure made of metal, with a flange at one end for docking with external devices, the flange having a positioning hole, and an annular step on the inner wall of the main body shell; the insulating base is made of insulating material and is fixed to the annular step of the main body shell by interference fit, the insulating base having port mounting holes evenly distributed along the circumference matching the number of RF port assemblies, and a shielding partition between each port mounting hole; each set of RF port assemblies corresponds to a mounting hole... The RF port assembly is installed in a port mounting hole. It includes a center conductor, an insulating sleeve, and an outer conductor. The outer conductor is fixedly connected to the shielding partition. The insulating sleeve is fitted over the center conductor, and the outer conductor is positioned outside the insulating sleeve and tightly fitted against the inner wall of the port mounting hole. The quick-locking mechanism includes at least two elastic latches distributed along the outer circumference of the flange. A corresponding slot for the external device is provided at the corresponding position of the elastic latches, and a guide bevel is provided at the end of each elastic latch. The sealing structure includes an annular sealing groove formed on the contact surface between the flange and the external device, and an O-ring embedded in the annular sealing groove. The height of the O-ring is slightly greater than the depth of the annular sealing groove.

[0006] Preferably, the main body shell is made of brass, and the flange has four positioning holes that are evenly distributed around the circumference of the flange.

[0007] Preferably, the insulating base is made of polytetrafluoroethylene, and the number of port mounting holes on the insulating base is 4.

[0008] Preferably, the shielding partition is made of brass with a thickness of 1.5-2.5mm, and is fixedly connected to the outer conductor by laser welding.

[0009] Preferably, the center conductor is made of oxygen-free copper; the insulating sleeve is made of polyimide; and the outer conductor is made of brass.

[0010] Preferably, the elastic buckle is made of phosphor bronze, there are 3 of them and they are evenly distributed along the circumference of the flange at 120°. The elastic deformation stroke of the elastic buckle is 2.8-3.2mm and the depth of the groove is 1.8-2.2mm.

[0011] Preferably, the sealing ring is made of silicone rubber with a Shore hardness of 58-62 degrees; the width of the annular sealing groove is 4.8-5.2 mm, the depth is 1.8-2.2 mm, and the tangential radius of the sealing ring is 2.8-3.2 mm.

[0012] Preferably, both the outer surface of the main body shell and the outer surface of the outer conductor are provided with a gold plating layer, and the thickness of the gold plating layer is 0.02-0.03 mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Low signal interference: By setting shielding partitions between each RF port to form an independent shielding cavity, signal crosstalk between ports is effectively blocked, ensuring the stability of RF signal transmission; 2. High assembly and disassembly efficiency: It adopts a quick locking mechanism with elastic buckles and slots, which eliminates the need for rotation and only requires axial pushing to complete the connection, significantly reducing assembly and disassembly time compared to traditional threaded structures; 3. Excellent sealing performance: The "O" ring silicone rubber seal at the flange can tightly fill the gap between the mating surfaces, and the waterproof rating can reach IP67. It can adapt to harsh environments such as outdoors and humidity, and extend the service life of the connector. 4. Compact structure: The RF ports are evenly distributed along the circumference of the insulating base, which can accommodate more ports in the same installation space, and the layout is neat and easy to manage cables. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection structure between this utility model and an external device; Figure 2This is a three-dimensional top view of the structure of this utility model; Figure 3 This is a three-dimensional upward view of the structure of this utility model; Figure 4 This is a schematic cross-sectional view of the main body shell of this utility model; Figure 5 This is a cross-sectional view of the main body shell of this utility model.

[0015] In the diagram: 1. Main casing; 2. Flange; 3. Insulating base; 4. Shielding partition; 5. RF port assembly; 51. Center conductor; 52. Insulating sleeve; 53. Outer conductor; 6. Elastic snap; 7. Sealing ring; 8. Positioning hole; 9. Annular step. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides a technical solution: a multi-port radio frequency connector, including a main body shell 1, an insulating base 3, multiple sets of radio frequency port assemblies 5, a quick locking mechanism, and a sealing structure.

[0018] The main body shell 1 is a cylindrical structure made of metal. One end has a flange 2 for connecting to external equipment. The flange 2 has positioning holes 8. The inner wall of the main body shell 1 has an annular step 9 to support the insulating base 3 and prevent axial displacement. The main body shell 1 is made of brass to ensure conductivity and enhance electromagnetic shielding. The flange 2 has four positioning holes 8, evenly distributed around its circumference, forming a "four-point positioning" system, improving positioning accuracy and preventing overall offset caused by deviation of a single positioning pin. The outer surface of the main body shell 1 is plated with a gold layer with a thickness of 0.025mm, providing superior corrosion resistance.

[0019] The insulating base 3 is made of insulating material and is fixed to the annular step 9 of the main body shell 1 by interference fit. The insulating base 3 has port mounting holes evenly opened along the circumferential direction to match the number of RF port assemblies 5. Shielding partitions 4 are provided between each port mounting hole. Each group of RF port assemblies 5 is installed in one port mounting hole.

[0020] The insulating base 3 is made of polytetrafluoroethylene (PTFE). Compared with ordinary insulating materials such as nylon, PTFE has improved high temperature resistance, lower dielectric constant, and reduced signal transmission loss. The insulating base 3 has four port mounting holes for mounting the RF port assembly 5.

[0021] The shielding partition 4 is made of brass and is 2mm thick to ensure shielding effectiveness. It is fixedly connected to the outer conductor 53 by laser welding. One end of the shielding partition 4 is flush with the inner wall of the insulating base 3, and the other end extends into the through hole in the center of the insulating base 3 to form an independent shielding cavity, blocking signal crosstalk between ports.

[0022] The radio frequency port assembly 5 includes a center conductor 51, an insulating sleeve 52, and an outer conductor 53. The outer conductor 53 is fixedly connected to the shielding partition 4. The insulating sleeve 52 is sleeved outside the center conductor 51, and the outer conductor 53 is located outside the insulating sleeve 52 and is tightly fitted to the inner wall of the port mounting hole.

[0023] The center conductor 51 is made of oxygen-free copper to ensure conductivity; the insulating sleeve 52 is made of polyimide to adapt to the temperature rise of the port and avoid high voltage breakdown; the outer conductor 53 is made of brass with a gold-plated layer on the outer surface. The gold-plated layer is 0.25mm thick, which reduces the resistance of the outer conductor 53 and also provides corrosion protection. It is interference-fitted with the 8mm outer diameter of the insulating sleeve 52 to prevent signal offset caused by the displacement of the insulating sleeve 52. At the same time, the brass material ensures grounding continuity.

[0024] Both the outer surface of the main body shell 1 and the outer conductor 53 are provided with a gold plating layer, the thickness of which is 0.02-0.03mm.

[0025] The quick-locking mechanism includes at least two elastic latches 6 distributed along the outer circumference of the flange 2. The external device has a corresponding slot that matches the elastic latches 6, and the end of the elastic latches 6 has a guide slope.

[0026] The elastic buckle 6 is made of phosphor bronze, which improves the elastic fatigue life. There are 3 of them, which are evenly distributed along the circumference of the flange 2 at 120°, so that the locking force is more uniform and avoids local stress concentration on the flange 2. The elastic deformation stroke of the elastic buckle 6 is 3mm and the depth of the groove is 2mm, ensuring that the buckle does not disengage from the groove under vibration.

[0027] The sealing structure includes an annular sealing groove formed on the mating surface of the flange 2 and the external equipment, and an "O" ring 7 embedded in the annular sealing groove. The height of the sealing ring 7 is slightly greater than the depth of the annular sealing groove.

[0028] The sealing ring 7 is made of silicone rubber, which has a wider temperature range and is suitable for outdoor high and low temperature environments. Its Shore hardness is 58-62 degrees, balancing "compression" and "resilience". The width of the annular sealing groove is 5mm and the depth is 2mm. The tangential radius of the sealing ring 7 is 3mm. The sealing ring 7 protrudes 1mm from the groove surface. After compression, it completely fills the gap, and the waterproof rating is stable at IP67 without leakage, avoiding sealing failure caused by size mismatch.

[0029] Specifically, the insulating base 3 and the shielding partition 4 are assembled first. The shielding partition 4 is embedded into the pre-processed slot of the insulating base 3, ensuring that the partition is perpendicular to the end face of the insulating base 3. The insulating base 3 with the shielding partition 4 assembled is pressed into the main body shell 1 by a pressing equipment, so that the lower end face of the insulating base 3 is completely in contact with the annular step 9. Next, the RF port assembly 5 is assembled. The center conductor 51 is inserted into the insulating sleeve 52, and an interference fit is achieved through a pressing mold to ensure no relative slippage. The assembled center conductor 51 and insulating sleeve 52 are pressed into the outer conductor 53 to form a complete RF port assembly 5. The RF port assemblies 5 are then installed one by one into the port mounting holes of the insulating base 3. The shielding partition 4 is welded to the outer conductor 53 using a fiber laser welding machine. After welding, it is checked for any false welds or missing welds. After welding, the conduction resistance between the outer conductor 53 and the shielding partition 4 is tested to be ≤1mΩ. Then, the quick locking mechanism and sealing structure are assembled. The elastic buckle 6 is fixed in the buckle mounting groove of the flange 2 with M2 micro screws to ensure that the buckle can be flexibly deformed. The "O" ring seal 7 is embedded in the annular sealing groove of the flange 2 to ensure that the seal 7 is completely in contact with the groove wall without twisting or offset. The gold plating layer on the surface of the main body shell 1 is checked to ensure that there are no scratches or missing plating. The overall assembly is completed. When using this multi-port RF connector, one end is connected to an RF coaxial cable. Take a suitable model of RF coaxial cable, fix the inner conductor of the cable to the end of the center conductor 51 by laser welding. After welding, test the contact resistance to be ≤5mΩ. Put a heat shrink tubing on the connection point and shrink and fix it with a hot air gun to complete the cable connection. The other end connects to the external device. Align the positioning hole 8 of the flange 2 with the positioning post of the external device, and insert it axially so that the positioning post is fully inserted into the positioning hole 8, achieving coaxial alignment between the connector and the device. Continue to push the connector axially until the edge of the external device flange contacts the guide slope of the elastic buckle 6, causing the buckle to change shape until it slides into the slot of the device. A "click" sound indicates that the locking is complete. After locking, check that there is no gap between the flange 2 and the device mating surface, the sealing ring 7 is compressed, and the waterproof and dustproof structure is effective. The center conductor 51 of the RF port assembly 5 has a "male pin" structure, and the corresponding port of the external device has a "female hole" structure. During docking, the elastic male pin of the center conductor 51 is inserted into the female hole of the external device. During operation, the radio frequency signal is transmitted uninterruptedly from the signal pin of the external device, the center conductor 51, and the inner conductor of the radio frequency cable. External electromagnetic interference is fully shielded by the external device housing, flange 2, main body shell 1, shielding partition 4, and outer conductor 53 to ensure signal purity.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-port radio frequency connector, characterized in that, Includes a main housing (1), an insulating base (3), multiple sets of radio frequency port assemblies (5), a quick-locking mechanism, and a sealing structure; The main body shell (1) is a cylindrical structure made of metal, with a flange (2) at one end for docking with external equipment. The flange (2) has a positioning hole (8), and the inner wall of the main body shell (1) has an annular step (9). The insulating base (3) is made of insulating material and is fixed to the annular step (9) of the main body shell (1) by interference fit. The insulating base (3) is evenly provided with port mounting holes along the circumferential direction, matching the number of the radio frequency port assemblies (5). Shielding partitions (4) are provided between each port mounting hole. Each group of radio frequency port assemblies (5) is installed in one port mounting hole. The radio frequency port assembly (5) includes a center conductor (51), an insulating sleeve (52) and an outer conductor (53). The outer conductor (53) is fixedly connected to the shielding partition (4). The insulating sleeve (52) is sleeved outside the center conductor (51). The outer conductor (53) is located outside the insulating sleeve (52) and is tightly fitted to the inner wall of the port mounting hole. The quick locking mechanism includes at least two elastic buckles (6) distributed along the outer circumference of the flange (2), and the corresponding position of the external device is provided with a slot matching the elastic buckle (6), and the end of the elastic buckle (6) is provided with a guide slope. The sealing structure includes an annular sealing groove formed on the mating surface of the flange (2) and the external equipment, and an "O"-ring (7) embedded in the annular sealing groove, wherein the height of the sealing ring (7) is slightly greater than the depth of the annular sealing groove.

2. A multi-port RF connector according to claim 1, characterized in that: The main body shell (1) is made of brass, and the flange (2) has four positioning holes (8) that are evenly distributed around the circumference of the flange 2.

3. A multi-port RF connector according to claim 1, characterized in that: The insulating base (3) is made of polytetrafluoroethylene, and the number of port mounting holes on the insulating base (3) is 4.

4. A multi-port RF connector according to claim 1, characterized in that: The shielding partition (4) is made of brass with a thickness of 1.5-2.5mm and is fixedly connected to the outer conductor (53) by laser welding.

5. A multi-port RF connector according to claim 1, characterized in that: The center conductor (51) is made of oxygen-free copper; the insulating sleeve (52) is made of polyimide; and the outer conductor (53) is made of brass.

6. A multi-port RF connector according to claim 1, characterized in that: The elastic buckle (6) is made of phosphor bronze, and there are 3 of them, which are evenly distributed along the circumference of the flange at 120°. The elastic deformation stroke of the elastic buckle (6) is 2.8-3.2mm, and the depth of the groove is 1.8-2.2mm.

7. A multi-port RF connector according to claim 1, characterized in that: The sealing ring (7) is made of silicone rubber with a Shore hardness of 58-62 degrees; the width of the annular sealing groove is 4.8-5.2 mm and the depth is 1.8-2.2 mm; the tangential radius of the sealing ring (7) is 2.8-3.2 mm.

8. A multi-port RF connector according to claim 1, characterized in that: The outer surfaces of the main body shell (1) and the outer conductor (53) are both provided with a gold plating layer, the thickness of which is 0.02-0.03 mm.

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