Welding-free radio frequency connector for testing bare coaxial cable

Abstract

The invention discloses a welding-free radio frequency connector for testing a bare coaxial cable, which comprises a central conductor, and a shell and a threaded sleeve which are arranged outside the central conductor, and further comprises a fastening nut, a pressing ring, an insulating medium, an anti-interference mechanism and a grounding mechanism, and the central conductor is arranged in the sleeve. Through cooperative arrangement of the shell, the threaded sleeve, the sleeve and the fastening nut, convenient dismounting and positioning of the central conductor are realized, through cooperative arrangement of the threaded sleeve and the fastening nut, convenience is provided for respective rapid connection of the inner conductor and the braided wire of the bare coaxial cable, convenient and reliable guarantee is provided for test precision, welding (crimping) is not needed, installation is convenient, and the cost is reduced. And under the arrangement of the sleeve, the insulating medium, the air compensation, the positioning step and the limiting step, the voltage standing wave ratio is reduced, and reliable guarantee is provided for stable placement and use of the central conductor.

Description

Technical Field

[0001] This invention relates to the field of radio frequency connector technology, specifically to a solderless radio frequency connector for testing bare coaxial cables. Background Technology

[0002] Bare coaxial cable testing is a crucial step in assessing cable connection performance, designed to ensure stable and efficient signal transmission. It is commonly used in network connectivity, audio / video transmission, and other applications. RF connectors are used in this process to precisely terminate the cable; their tight tolerances and shielding minimize signal loss and ensure impedance matching, thereby improving test accuracy.

[0003] In high-frequency testing, bare coaxial cables, as the device under test, need to be effectively connected to vector network analysis test lines. This typically requires soldering or crimping SMA or 3.5mm connectors. These connectors are not reusable and must be scrapped after testing, increasing testing costs. Furthermore, soldering and crimping are critical processes; improper handling directly affects high-frequency test results. Therefore, we propose a solderless RF connector for bare coaxial cable testing. Summary of the Invention

[0004] The purpose of this invention is to provide a solderless RF connector for testing bare coaxial cables, in order to solve the problems mentioned in the background art, such as the soldering and waste of existing RF connectors used for high-frequency testing of bare coaxial cables, and the poor test consistency caused by different soldering (crimping) techniques.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a solderless RF connector for testing bare coaxial cables, comprising a center conductor, a housing and a threaded sleeve disposed outside the center conductor, and further comprising a fastening nut, a pressure ring, an insulating medium, an anti-interference mechanism, and a grounding mechanism. A sleeve is installed on the common internal thread of the housing and the threaded sleeve. The center conductor is disposed inside the sleeve. The housing, the threaded sleeve, the sleeve, and the center conductor are coaxially arranged. A connecting nut is installed on the outer peripheral thread of one end of the housing. A second internal thread is formed on the outer peripheral thread of one end of the threaded sleeve. The fastening nut cooperates with the second internal thread.

[0006] Preferably, a positioning step is provided on one side of the inner cavity of the outer shell, and an end face two is provided on the sleeve, the positioning step and the end face two are used in conjunction.

[0007] Preferably, the insulating medium is sleeved on the outer periphery of the central conductor; The insulating medium is made of polyetherimide material; The outer periphery of the central conductor is also provided with a limiting step adapted to the insulating medium, and the tail of the central conductor is also provided with a protrusion that cooperates with the inner conductor of the bare coaxial cable.

[0008] Preferably, the insulating medium and the sleeve are interference-fitted, the insulating medium is provided with an end face, and the sleeve is provided with a stepped end face. The end face and the stepped end face are used together to make the center conductor, the insulating medium and the sleeve a whole.

[0009] Preferably, the threaded sleeve is provided with a stepped surface two, the pressure ring is provided with an end face three and an end face five, and the fastening nut is provided with an external thread and an end face four.

[0010] Preferably, one end of the outer periphery of the outer shell is provided with an outer annular groove, and an elastic retaining ring is provided inside the outer annular groove. The inner annular groove is provided inside the connecting nut and is used in conjunction with the elastic retaining ring. One end of the outer periphery of the outer shell is also provided with a stepped surface. A sealing washer is fitted around the outer periphery of the stepped surface. The sealing washer is located inside the connecting nut. The connecting nut has a first internal thread inside.

[0011] Preferably, the anti-interference mechanism includes an alloy base, a silicone pad is fixedly connected to the bottom of the alloy base, corresponding mounting holes are provided at the top corners of the alloy base and the silicone pad, an alloy support leg is fixedly installed on the top of the alloy base, a fixed alloy cover is fixedly installed on the top of the alloy support leg, a movable alloy cover is movably abutted against the top of the fixed alloy cover, and alloy cylinders are fixedly connected to both sides of the fixed alloy cover.

[0012] Preferably, aluminum foil layers are fixedly connected to the inner walls of the fixed alloy cover, the movable alloy cover, and the alloy cylinder. A woven mesh is fixedly connected to the inner wall of the aluminum foil layer. A welding block is fixedly installed on the outer wall of the fixed alloy cover. A rotating component is fixedly installed on the inner wall of the welding block. The movable alloy cover is fixedly installed at the end of the rotating component. A plastic buckle one is detachably connected to the outer wall of the movable alloy cover. A plastic buckle two is detachably connected to the outer wall of the fixed alloy cover. The plastic buckle one is movably inserted into the inner cavity of the plastic buckle two.

[0013] Preferably, the grounding mechanism includes an alloy support arm, which is fixedly installed on the outer wall of the alloy base. An alloy disk is fixedly installed at the end of the alloy support arm, and a rotating shaft is rotatably connected to the top of the alloy disk. A turntable is fixedly installed on the outer wall of the rotating shaft, and corresponding through holes are provided on the top of both the alloy disk and the turntable.

[0014] Preferably, a support block is fixedly installed on the top of the alloy support arm, an end threaded rod is threadedly connected to the inner wall of the support block, a pressure block is rotatably connected to the end of the end threaded rod, a limit rod is fixedly installed on the outer wall of the pressure block, and the limit rod is slidably connected to the end threaded rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves convenient disassembly and positioning of the center conductor through the coordinated arrangement of the outer shell, screw sleeve, sleeve, and fastening nut. The screw sleeve and fastening nut facilitate the quick connection of the inner conductor and braided wire of the bare coaxial cable, providing convenient and reliable assurance for testing accuracy. While eliminating the need for welding (crimping) and facilitating installation, the design of the sleeve, insulating medium, air compensation, positioning step, and limiting step reduces the voltage standing wave ratio and provides reliable assurance for the stable placement and use of the center conductor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the outer shell of the present invention; Figure 2 This is a cross-sectional view of the overall outer shell of the present invention; Figure 3 This is a schematic diagram of the semi-sectional structure of the outer shell of the present invention; Figure 4 This is a cross-sectional structural diagram of the outer shell, connecting nut, central conductor, sleeve, threaded sleeve, pressure ring, and fastening nut of the present invention; Figure 5 This is a schematic diagram of the anti-interference mechanism and grounding mechanism of the present invention; Figure 6 This is a schematic diagram of the opening structure of the movable alloy cover of the present invention; Figure 7 This is a partially cutaway structural diagram of the movable alloy cover of the present invention; Figure 8 This is a schematic diagram of the grounding mechanism of the present invention.

[0017] In the diagram: 1. Center conductor; 2. Outer shell; 3. Screw sleeve; 4. Fastening nut; 5. Connecting nut; 6. Sleeve; 7. Insulating medium; 8. Elastic retaining ring; 9. Outer annular groove; 10. Inner annular groove; 11. Step surface one; 12. Sealing washer; 13. First internal thread; 14. Positioning step; 15. Protrusion; 16. Limiting step; 17. Second internal thread; 18. Step end face; 19. Step surface two; 20. Pressure ring; 21. End face one; 22. End face two; 23. End face three; 24. External thread; 25. End face four; 26. End face 5; 30. Anti-interference mechanism; 31. Alloy base; 32. Silicone pad; 33. Mounting hole; 34. Alloy support leg; 35. Fixed alloy cover; 36. Movable alloy cover; 361. Aluminum foil layer; 362. Braided mesh; 37. Alloy cylinder; 38. Welding block; 39. Rotating part; 391. Plastic buckle one; 392. Plastic buckle two; 40. Grounding mechanism; 41. Alloy support arm; 42. Alloy disc; 43. Rotating shaft; 44. Turntable; 45. Through hole; 46. Support block; 47. End threaded rod; 48. Pressure block; 49. Limiting rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-8 This invention provides a technical solution: a solderless RF connector for testing bare coaxial cables, including a center conductor 1, a housing 2 and a screw sleeve 3 disposed outside the center conductor 1, and further including a fastening nut 4, a pressure ring 20, an insulating medium 7, an anti-interference mechanism 30 and a grounding mechanism 40. A sleeve 6 is installed on the common internal thread of the housing 2 and the screw sleeve 3. The center conductor 1 is disposed inside the sleeve 6. The housing 2, the screw sleeve 3, the sleeve 6 and the center conductor 1 are coaxially arranged. A connecting nut 5 is installed on the outer peripheral thread of one end of the housing 2. A second internal thread 17 is opened on the outer peripheral of one end of the screw sleeve 3. The fastening nut 4 is used in conjunction with the second internal thread 17.

[0020] In a preferred embodiment, a positioning step 14 is provided on one side of the inner cavity of the outer shell 2, and an end face 22 is provided on the sleeve 6. The positioning step 14 and the end face 22 are used in conjunction.

[0021] In a preferred embodiment, the insulating medium 7 is sleeved on the outer periphery of the central conductor 1; Insulating medium 7 is made of polyetherimide material; The outer periphery of the center conductor 1 is also provided with a limiting step 16 adapted to the insulating medium 7, and the tail of the center conductor 1 is also provided with a protrusion 15 that cooperates with the inner conductor of the bare coaxial cable.

[0022] In a preferred embodiment, the insulating medium 7 and the sleeve 6 are interference-fitted. The insulating medium 7 is provided with an end face 21, and the sleeve 6 is provided with a stepped end face 18. The end face 21 and the stepped end face 18 are used together to make the center conductor 1, the insulating medium 7 and the sleeve 6 a whole.

[0023] In a preferred embodiment, the threaded sleeve 3 is provided with a stepped surface 19, the pressure ring 20 is provided with an end face 23 and an end face 26, and the fastening nut 4 is provided with an external thread 24 and an end face 25.

[0024] In a preferred embodiment, an outer annular groove 9 is provided at one end of the outer periphery of the outer shell 2, and an elastic retaining ring 8 is provided inside the outer annular groove 9. An inner annular groove 10 is provided inside the connecting nut 5, and the inner annular groove 10 is used in conjunction with the elastic retaining ring 8. A stepped surface 11 is also provided at one end of the outer periphery of the outer shell 2, and a sealing washer 12 is fitted around the outer periphery of the stepped surface 11. The sealing washer 12 is provided inside the connecting nut 5, and a first internal thread 13 is provided inside the connecting nut 5. The first internal thread 13 is used in conjunction with a standard SMA or 3.5mm female head.

[0025] In a preferred embodiment, the anti-interference mechanism 30 includes an alloy base 31, a silicone pad 32 fixedly connected to the bottom of the alloy base 31, corresponding mounting holes 33 at the top corners of the alloy base 31 and the silicone pad 32, an alloy support leg 34 fixedly mounted on the top of the alloy base 31, a fixed alloy cover 35 fixedly mounted on the top of the alloy support leg 34, a movable alloy cover 36 movably abutting the top of the fixed alloy cover 35, and alloy cylinders 37 fixedly connected to both sides of the fixed alloy cover 35. Before testing, the user can use bolts to... The anti-interference mechanism 30 and the grounding mechanism 40 are installed on the test platform. There may be interference sources such as power supply noise and wireless equipment in the laboratory or industrial site. When the RF connector is working in the GHz band, it is susceptible to external electromagnetic interference and signal crosstalk, which may lead to distorted or misjudged test data. During the test, the movable alloy cover 36 is opened by rotation, and then the center conductor 1 is moved into the inner cavity of the fixed alloy cover 35. Through the cooperation of the fixed alloy cover 35, the movable alloy cover 36 and the alloy cylinder 37, the center conductor 1 can be protected against interference.

[0026] In a preferred embodiment, aluminum foil layers 361 are fixedly connected to the inner walls of the fixed alloy cover 35, the movable alloy cover 36, and the alloy cylinder 37. A woven mesh 362 is fixedly connected to the inner wall of the aluminum foil layer 361. A welding block 38 is fixedly installed on the outer wall of the fixed alloy cover 35. A rotating component 39 is fixedly installed on the inner wall of the welding block 38. The movable alloy cover 36 is fixedly installed at the end of the rotating component 39. A plastic clip 391 is detachably connected to the outer wall of the movable alloy cover 36. A plastic clip 392 is detachably connected to the outer wall of the fixed alloy cover 35. The plastic clip 391 is movably inserted into the inner cavity of the plastic clip 392, through the aluminum foil layer 361. The design of the braided mesh 362 achieves a double shielding function, which can improve the anti-interference ability of the fixed alloy cover 35, the movable alloy cover 36, and the alloy cylinder 37. When the fixed alloy cover 35 rotates to close the movable alloy cover 36, the plastic buckle 1 391 will engage with the inside of the plastic buckle 2 392, locking the movable alloy cover 36 in a closed state. The plastic buckle 1 391 is installed on the movable alloy cover 36 with screws, and the plastic buckle 2 392 is installed on the fixed alloy cover 35 with screws. The plastic buckle 1 391 and the plastic buckle 2 392 can be replaced after damage. The movable alloy cover 36 is equipped with a handle for easy opening and closing by the user.

[0027] In a preferred embodiment, the grounding mechanism 40 includes an alloy support arm 41, which is fixedly mounted on the outer wall of the alloy base 31. An alloy disk 42 is fixedly mounted at the end of the alloy support arm 41. A rotating shaft 43 is rotatably connected to the top of the alloy disk 42. A turntable 44 is fixedly mounted on the outer wall of the rotating shaft 43. Corresponding through holes 45 are provided on the top of both the alloy disk 42 and the turntable 44. When the anti-interference mechanism 30 and the grounding mechanism 40 are grounded, multiple ground wires are passed through the inner cavity of the through holes 45. Then, the rotating shaft 43 is rotated, causing the turntable 44 to rotate, so that the ground wires are secured on the alloy disk 42, thereby achieving the grounding function. Multiple ground wires can be clamped at the same time, which is convenient for use. Even if one ground wire is damaged, a good grounding effect can still be maintained, ensuring the test results.

[0028] In a preferred embodiment, a support block 46 is fixedly installed on the top of the alloy support arm 41. An end threaded rod 47 is threadedly connected to the inner wall of the support block 46. A pressure block 48 is rotatably connected to the end of the end threaded rod 47. A limit rod 49 is fixedly installed on the outer wall of the pressure block 48. The limit rod 49 is slidably connected to the end threaded rod 47. After clamping the ground wire by rotating the shaft 43, the end threaded rod 47 is manually rotated. The pressure block 48 will move toward the outer wall of the shaft 43 under the limit of the limit rod 49, and then fit tightly against the outer wall of the shaft 43, thereby realizing the function of firmly clamping the shaft 43, and thus positioning the rotation angle of the shaft 43 and the turntable 44 to maintain the clamping state.

[0029] Working principle: During testing, the fastening nut 4 is inserted into the coaxial cable with the external thread 24 facing outward along the cable axis. The cable shielding braid is folded over and covered onto the end face 25 of the fastening nut 4. The pressure ring 20 is inserted into the coaxial cable core insulation with the end face 26 facing outward along the cable axis. The external thread 24 of the fastening nut 4 is tightened with the second internal thread 17 of the screw sleeve 3, so that the end face 23 of the pressure ring 20 mates with the step surface 19 of the screw sleeve 3. At the same time, the cable shielding braid is firmly crimped. Excess core wire of the coaxial cable is cut off, so that the cable core insulation, the inner conductor of the cable, and the end face 26 of the pressure ring 20 are on the same plane. After the screw sleeve 3 is connected to the outer shell 2 by threads, the positioning step 14 mates tightly with the end face 22, and the protrusion 15 of the center conductor 1 reliably contacts and mates with the inner conductor of the coaxial cable. Before testing, the user can use bolts to install the anti-interference mechanism 30 and the grounding mechanism 40 on the test platform through the mounting hole 33. The center conductor 1 and the cable under test are moved through the alloy cylinder 37 to the inner cavity of the fixed alloy cover 35 for connection. Then the movable alloy cover 36 is closed to provide anti-interference protection at the connection point.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solderless RF connector for testing bare coaxial cables, comprising a center conductor (1), and a housing (2) and a threaded sleeve (3) disposed outside the center conductor (1), characterized in that: It also includes a fastening nut (4), a pressure ring (20), an insulating medium (7), an anti-interference mechanism (30), and a grounding mechanism (40). The common thread inside the outer shell (2) and the screw sleeve (3) is fitted with a sleeve (6). The center conductor (1) is located inside the sleeve (6). The outer shell (2), the screw sleeve (3), the sleeve (6), and the center conductor (1) are coaxially arranged. A connecting nut (5) is installed on the outer circumference thread at one end of the outer shell (2). A second internal thread (17) is opened on the outer circumference at one end of the screw sleeve (3). The fastening nut (4) is used in conjunction with the second internal thread (17).

2. The solderless RF connector for testing bare coaxial cables according to claim 1, characterized in that: A positioning step (14) is provided on one side of the inner cavity of the outer shell (2), and an end face (22) is provided on the sleeve (6). The positioning step (14) and the end face (22) are used in conjunction.

3. The solderless RF connector for testing bare coaxial cables according to claim 2, characterized in that: The insulating medium (7) is sleeved on the outer periphery of the central conductor (1); The insulating medium (7) is made of polyetherimide material; The outer periphery of the center conductor (1) is provided with a limiting step (16) adapted to the insulating medium (7), and the tail of the center conductor (1) is provided with a protrusion (15) that cooperates with the inner conductor of the bare coaxial cable.

4. The solderless RF connector for testing bare coaxial cables according to claim 3, characterized in that: The insulating medium (7) is interference-fitted with the sleeve (6). The insulating medium (7) is provided with an end face (21), and the sleeve (6) is provided with a stepped end face (18). The end face (21) and the stepped end face (18) are used together to make the center conductor (1), the insulating medium (7) and the sleeve (6) a whole.

5. A solderless RF connector for testing bare coaxial cables according to claim 4, characterized in that: The threaded sleeve (3) is provided with a stepped surface two (19), the pressure ring (20) is provided with an end face three (23) and an end face five (26), and the fastening nut (4) is provided with an external thread (24) and an end face four (25).

6. A solderless RF connector for testing bare coaxial cables according to claim 5, characterized in that: The outer periphery of the outer shell (2) is provided with an outer annular groove (9) at one end, and an elastic retaining ring (8) is provided inside the outer annular groove (9). The inner annular groove (10) is provided inside the connecting nut (5). The inner annular groove (10) is used in conjunction with the elastic retaining ring (8). The outer periphery of the outer shell (2) is also provided with a stepped surface (11). A sealing washer (12) is provided around the outer periphery of the stepped surface (11). The sealing washer (12) is provided inside the connecting nut (5). The connecting nut (5) is provided with a first internal thread (13).

7. A solderless RF connector for testing bare coaxial cables according to claim 1, characterized in that: The anti-interference mechanism (30) includes an alloy base (31), a silicone pad (32) is fixedly connected to the bottom of the alloy base (31), and corresponding mounting holes (33) are provided at the top corners of the alloy base (31) and the silicone pad (32). An alloy support leg (34) is fixedly installed on the top of the alloy base (31), and a fixed alloy cover (35) is fixedly installed on the top of the alloy support leg (34). A movable alloy cover (36) is movably abutted against the top of the fixed alloy cover (35), and alloy cylinders (37) are fixedly connected to both sides of the fixed alloy cover (35).

8. A solderless RF connector for testing bare coaxial cables according to claim 7, characterized in that: Aluminum foil layer (361) is fixedly connected to the inner wall of the fixed alloy cover (35), the movable alloy cover (36) and the alloy cylinder (37). A woven mesh (362) is fixedly connected to the inner wall of the aluminum foil layer (361). A welding block (38) is fixedly installed on the outer wall of the fixed alloy cover (35). A rotating part (39) is fixedly installed on the inner wall of the welding block (38). The movable alloy cover (36) is fixedly installed at the end of the rotating part (39). A plastic buckle one (391) is detachably connected to the outer wall of the movable alloy cover (36). A plastic buckle two (392) is detachably connected to the outer wall of the fixed alloy cover (35). The plastic buckle one (391) is movably inserted into the inner cavity of the plastic buckle two (392).

9. A solderless RF connector for testing bare coaxial cables according to claim 8, characterized in that: The grounding mechanism (40) includes an alloy support arm (41), which is fixedly installed on the outer wall of the alloy base (31). An alloy disk (42) is fixedly installed at the end of the alloy support arm (41). A rotating shaft (43) is rotatably connected to the top of the alloy disk (42). A turntable (44) is fixedly installed on the outer wall of the rotating shaft (43). Corresponding through holes (45) are opened on the top of the alloy disk (42) and the turntable (44).

10. A solderless RF connector for testing bare coaxial cables according to claim 9, characterized in that: A support block (46) is fixedly installed on the top of the alloy support arm (41). An end threaded rod (47) is threadedly connected to the inner wall of the support block (46). A pressure block (48) is rotatably connected to the end of the end threaded rod (47). A limit rod (49) is fixedly installed on the outer wall of the pressure block (48). The limit rod (49) is slidably connected to the end threaded rod (47).

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