Radio frequency coaxial connector and assembly tool thereof

Abstract

The utility model discloses a radio frequency coaxial connector and an assembly tool thereof, and aims to solve the problems that an inner conductor of a conventional radio frequency connector is not firmly fixed and is easy to loosen and signal reflection is increased in a plugging process. The connector consists of the outer conductor, the nut, the insulator, the inner conductor and the shell, the insulator which is seamlessly cut from the center is adopted, and the inner conductor and the insulator are accurately matched through a specially designed assembly tool, so that the consistency of concentricity is ensured. The inner conductor is pressed into the shell through the tool, so that the stability and reliability of the electrical performance of the connector are ensured. In addition, the outer conductor and the shell are combined in an interference press-fit mode, and tight fit of the outer conductor is guaranteed through a tool. According to the structure, the stability of the inner conductor can be kept in frequent plugging operation, falling is avoided, the long-time use stability and consistency of the connector are ensured, and the connector is suitable for communication and electronic equipment with high-frequency and high-stability requirements.

Description

Technical Field

[0001] This utility model belongs to the field of radio frequency connectors, and in particular relates to a radio frequency coaxial connector and its assembly tooling. Background Technology

[0002] In modern communication and electronic equipment, RF coaxial connectors play a crucial role, widely used for the transmission and connection of RF signals. Especially in the 4.310 type RF coaxial connector, high-frequency stability, low signal loss, and good electrical performance are required to meet the needs of high-precision equipment. However, existing 4.310 type connectors have shortcomings in their structural design, particularly in the method of fixing the inner conductor, which uses a barbed fixing method. While this design can temporarily fix the conductor, the inner conductor is prone to shifting or even falling off during frequent mating and unmating operations due to the insertion and extraction forces. This phenomenon not only affects the stability of signal transmission and produces significant signal reflection, but may also lead to a decrease in the reliability of the connector during long-term use, ultimately affecting the performance of the entire device.

[0003] Current traditional technologies have not effectively solved the problem of precisely controlling the concentricity between the inner conductor and the connector. Due to the lack of precise assembly tooling, the installation of the inner conductor is often misaligned, leading to impedance mismatch and signal loss during signal transmission. In severe cases, this can result in a large VSWR, affecting the normal operation of the equipment and signal quality. Furthermore, existing designs still lack effective fixation and stability guarantees at the junction of the insulator and the inner conductor, as well as the tight fit between the outer conductor and the shell. Especially during mass production, it is difficult to achieve consistent product performance, causing serious production efficiency and quality control problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an RF coaxial connector and its assembly tooling.

[0005] The specific technical solution provided by this utility model is as follows:

[0006] A radio frequency coaxial connector includes an outer conductor, a nut, an insulator, an inner conductor, and a housing; the insulator is disposed inside the housing and has a central through hole; the inner conductor includes a pin section, a middle section, and a socket section, the diameter of the middle section being smaller than the diameters of the pin section and the socket section, the middle section being nested into the central through hole of the insulator, and the length of the middle section being the same as the length of the insulator; the outer conductor is press-fitted to the housing, and one end of the outer conductor is connected to a nut.

[0007] Furthermore, it also includes a retaining element. The insertion section of the inner conductor forms an abutting connection with the inner wall of the end of the outer casing through the retaining element. The outer casing is provided with a corresponding retaining element slot, and the inner diameter of the end of the outer casing gradually decreases from the outside to the inside.

[0008] Furthermore, the insulator is cut into two interconnected parts to facilitate the fitting of the variable-diameter inner conductor into the central through-hole of the insulator.

[0009] Furthermore, the insulator has grooves at both ends for compensating for impedance.

[0010] Preferably, the inner conductor is made of copper or aluminum and has a plating layer to improve its conductivity and corrosion resistance.

[0011] Preferably, the insulator is made of polytetrafluoroethylene or polyetherimide.

[0012] An assembly fixture for the aforementioned connector, wherein one end of the assembly fixture has a receiving cavity for accommodating an inner conductor pin segment and a flared opening that expands outward from the receiving cavity, the diameter of the receiving cavity being larger than the diameter of the central through hole of the insulator, and the inner diameter of the flared opening being larger than the outer diameter of the front end of the outer shell.

[0013] An assembly fixture for the connector described above, wherein the tail end of the assembly fixture has a receiving cavity for accommodating the inner conductor pin segment, and a locking position at the tail end of the assembly fixture is provided inside the outer conductor.

[0014] Compared to existing technologies, this invention employs a seamlessly cut insulator from the center and uses specially designed tooling to tightly fit the inner conductor with the insulator, ensuring consistent concentricity between the inner conductor and the connector, thereby effectively improving the stability and reliability of electrical performance. This design solves the signal instability problem caused by assembly errors in existing technologies. Furthermore, the ingenious design of the assembly tooling, such as the flared shape and matching inner diameter of tool two with the outer shell, allows for precise positioning of the inner conductor and insulator during assembly, avoiding electrical performance degradation due to improper assembly. During assembly, the outer conductor and outer shell are joined using an interference fit, ensuring a tight connection between them. Moreover, the application of tool three further guarantees high-precision assembly of the outer conductor and outer shell, avoiding electrical performance instability caused by loose or insecure assembly. Through these innovative assembly methods, this invention not only ensures that the inner conductor remains fixed during frequent insertion and removal of the connector, but also minimizes signal reflection and VSWR through precise impedance control, thereby significantly improving the connector's electrical performance and meeting the stability requirements of high-frequency applications. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] Figure 1 This is a half-sectional schematic diagram of an embodiment of the radio frequency coaxial connector provided by this utility model;

[0017] Figure 2 This is a schematic diagram of insulator cutting according to an embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of an insulator provided in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the inner conductor assembly provided in one embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the outer conductor assembly provided in one embodiment of the present invention.

[0021] The reference numerals in the attached drawings are as follows: 1-outer conductor, 2-nut, 3-insulator, 4-inner conductor, 5-shell, A-tool one, B-tool two, C-tool three. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] This embodiment provides an RF coaxial connector, such as... Figure 1 As shown, the connector includes an outer conductor 1, a nut 2, an insulator 3, an inner conductor 4, and a housing 5.

[0024] The inner conductor is the core component of an RF coaxial connector, responsible for signal transmission. It is typically made of copper or aluminum and may be plated with gold or silver to improve conductivity and corrosion resistance. (Reference) Figure 5 In this embodiment, the inner conductor 4 is divided into three parts: a pin section, a middle section, and a socket section. The diameter of the middle section is smaller than that of the pin section and the socket section, forming a stepped shape. During assembly, the middle section of the inner conductor 4 is nested into the central through hole of the insulator. The length of the middle section is the same as the length of the insulator, thus forming a tight fit with the insulator.

[0025] An insulator is located between the inner and outer conductors, and its main function is to prevent signal interference and short circuits. Common insulator materials include polytetrafluoroethylene (PTFE) and polyetherimide (PEI). Figure 2 As shown, this embodiment uses a seamless cutting method to cut the insulator 3 through the center, but not completely split it into two halves. This cutting method allows for easy assembly of the variable-diameter inner conductor 4 into the central through-hole of the insulator 3. This design not only improves the convenience of assembly, but also ensures the integrity and stability of the insulator during the assembly process.

[0026] During assembly, first insert the inner conductor 4 into the cut insulator 3, then use tool A and tool B to press the insulator and inner conductor together into the outer casing 5, as shown. Figure 4 As shown. The housing 5 has an insulator holder, and the insulator 3 is interference-fitted with the housing 5 to form a stable connection. One end of fixture B has a receiving cavity to accommodate the inner conductor pin section and a flared opening immediately following the receiving cavity. The flared opening facilitates the insertion of the insulator and inner conductor as a whole into fixture B. The diameter of the receiving cavity is larger than the diameter of the central through hole of the insulator 3, and the inner diameter of the flared opening is larger than the outer diameter of the front end of the housing 5. Fixture A is used to press against fixture B, thereby pressing the insulator and inner conductor as a whole into the housing 5. Fixture B ensures the concentricity of the inner conductor and the connector during installation, achieving stability and reliability of electrical performance.

[0027] To further enhance the stability of the inner conductor 4 within the outer casing 5, a stabilizing element is also provided, such as... Figure 5 As shown, the insertion section of the inner conductor 4 is connected to the outer shell 5 through a retainer. The outer shell 5 is provided with a corresponding retainer slot, and the inner diameter of the end of the outer shell 5 gradually decreases from the outside to the inside.

[0028] After the insulator and inner conductor are assembled, nut 2 is connected to outer conductor 1, and then outer conductor 1, with nut 2 connected, is connected to outer casing 5 via interference fit. The outer conductor serves as shielding to prevent external electromagnetic interference and acts as grounding. The outer conductor is typically made of materials such as stainless steel or gold-plated copper alloy to enhance its durability and shielding effect. Figure 4 As shown, when assembling the outer conductor, tooling 3C can be used for auxiliary pressing and fitting. The tail end of tooling 3C has a receiving cavity to accommodate the inner conductor pin section, and the outer conductor 1 is provided with a tail end clamping position of tooling 3C.

[0029] In this embodiment, the connector uses a very thin supporting insulator 3, entirely filled with air to reduce the dielectric constant of the medium and thus minimize signal reflection, achieving a very low standing wave ratio. Because the inner conductor 4 introduces a certain step, causing impedance discontinuity, slots are cut at both ends of the insulator 3, such as... Figure 3As shown, by changing the characteristic impedance through slotting, effective compensation for the stepped discontinuous capacitance is achieved, thereby minimizing reflection at higher frequencies and thus realizing the stability and reliability of electrical performance.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A radio frequency coaxial connector, characterized in that, The device includes an outer conductor, a nut, an insulator, an inner conductor, and a housing. The insulator is disposed inside the housing and has a central through hole. The inner conductor includes a pin section, a middle section, and a socket section. The diameter of the middle section is smaller than the diameters of the pin section and the socket section. The middle section is nested into the central through hole of the insulator, and the length of the middle section is the same as the length of the insulator. The outer conductor is press-fitted to the housing, and one end of the outer conductor is connected to a nut.

2. The RF coaxial connector as described in claim 1, characterized in that, It also includes a retaining element. The insertion section of the inner conductor forms an abutting connection with the inner wall of the end of the outer shell through the retaining element. The outer shell is provided with a corresponding retaining element slot. The inner diameter of the end of the outer shell gradually decreases from the outside to the inside.

3. The RF coaxial connector as described in claim 1, characterized in that, The insulator is cut into two interconnected parts to facilitate the fitting of the variable-diameter inner conductor into the central through-hole of the insulator.

4. The RF coaxial connector as described in claim 1, characterized in that, The insulator has grooves at both ends for impedance compensation.

5. The RF coaxial connector as described in claim 1, characterized in that, The inner conductor is made of copper or aluminum and is provided with a plating to improve its conductivity and corrosion resistance.

6. The RF coaxial connector as described in claim 1, characterized in that, The insulator is made of polytetrafluoroethylene or polyetherimide.

7. An assembly fixture for a connector as described in claim 1, characterized in that, One end of the assembly fixture has a receiving cavity for accommodating the inner conductor pin section and a flared opening that expands outward from the receiving cavity. The diameter of the receiving cavity is larger than the diameter of the central through hole of the insulator, and the inner diameter of the flared opening is larger than the outer diameter of the front end of the outer shell.

8. An assembly fixture for a connector as described in claim 1, characterized in that, The assembly fixture has a receiving cavity at its tail end to accommodate the inner conductor pin section, and a locking position at the tail end of the assembly fixture is provided inside the outer conductor.

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