Fuzz button elastic interconnection type radio frequency cable assembly

Abstract

The invention relates to the technical field of radio frequency connection structures, in particular to a fuzz button elastic interconnection type radio frequency cable assembly, which comprises a semi-rigid cable of which one end is connected with a radio frequency connector element, and further comprises a radio frequency connection part which comprises an outer end shell sleeve and an inner end shell sleeve which are detachably mounted, and a conductor end, at least one fuzz button and a conductor rod are sequentially arranged in the integral shell cavity of the outer end shell sleeve and the inner end shell sleeve. An elastic floating electric conductor is formed through the radio frequency connecting part, an elastic interconnection design can be realized by utilizing a three-dimensional network structure formed by randomly staggering fuzz buttons and matching with a spring probe, multi-dimensional displacement compensation capability, vibration resistance and impact resistance far better than those of a traditional elastic structure are provided, and the mechanical service life is favorably prolonged; the fuzz button is matched with the characteristic impedance, so that the problem of impedance mismatch caused by a traditional elastic element can be solved, and the effects of keeping a low voltage standing wave ratio and low insertion loss in a DC-40GHz frequency band can be achieved.

Description

Technical Field

[0001] This invention relates to the field of radio frequency connection structure technology, and more specifically to a button-type elastic interconnect radio frequency cable assembly. Background Technology

[0002] With the rapid development of 5G communication, millimeter-wave radar, micro base stations and portable electronic devices towards higher frequencies and higher densities, radio frequency interconnect systems face stringent performance challenges and need to meet multiple requirements such as flexible interconnect, wide bandwidth (DC-40GHz), and high reliability.

[0003] Existing miniature RF connection solutions have many technical pain points: Traditional rigid RF connectors use a rigid mating structure, which is prone to poor contact under the thermal expansion and contraction caused by vibration, shock or temperature cycling, resulting in signal interruption or phase drift, and cannot adapt to dynamic working scenarios; Most flexible solutions directly use spring probe structures, which have a certain displacement compensation capability, but have significant defects in the millimeter-wave broadband band - the impedance changes drastically during the probe extension and retraction, causing serious signal reflection and deterioration of voltage standing wave ratio, and the single-point contact design is prone to wear and jamming, with limited mechanical life.

[0004] In summary, existing technologies are insufficient to meet the demands for flexible compensation and other requirements, and cannot satisfy the stringent requirements of modern electronic devices for RF interconnect systems. Therefore, the development of a new type of RF cable assembly with balanced performance has become an urgent need in the industry. In view of this, we propose a button-type flexible interconnect RF cable assembly. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned in the background art and provide a snap-button flexible interconnect type radio frequency cable assembly.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A snap-button flexible interconnect type RF cable assembly includes a semi-rigid cable with an RF connector element connected to one end, and further includes: The radio frequency connection includes a detachable outer end shell and an inner end shell, wherein a conductor end for conductive connection, at least one button and a conductor rod are sequentially installed inside the integral cavity of the outer end shell and the inner end shell. The conductor rod is used to electrically connect with the other end of the semi-rigid cable to form a continuous closed loop.

[0007] Preferably, the outer end shell has multiple evenly distributed side cavities with open ends along the axis, and spring probes are inserted into the side cavities from the inside to the outside.

[0008] Preferably, a first insulating inner bushing and a second insulating inner bushing are coaxially inserted at the axial center of the outer end shell and the inner end shell, respectively.

[0009] Preferably, the first insulating inner bushing is provided with a first shaft cavity and a limiting hole that are mutually connected from the inside to the outside along the axis, and the inner diameter of the limiting hole is smaller than that of the first shaft cavity; The conductor end has an inverted T-shaped cross-section and is inserted into the limiting hole from the inside to the outside along the first shaft cavity.

[0010] Preferably, the second insulating inner bushing has a second shaft cavity at its center that corresponds to the position of the first shaft cavity, and the conductor rod is fixedly installed in the second shaft cavity; The button is disposed in the first shaft cavity and its two ends are respectively attached to the conductor end and the conductor rod.

[0011] Preferably, the conductor rod has a core groove on the side corresponding to the semi-rigid cable, and the core groove is used to insert the cable core provided inside the semi-rigid cable.

[0012] Preferably, the characteristic impedance of the button located in the compression and rebound region within the first shaft cavity is set to 50Ω±0.5Ω.

[0013] Preferably, the inner end sleeve has a welding groove with an inner diameter that gradually increases from the inside to the outside near the end of the semi-rigid cable, and the semi-rigid cable and the inner end sleeve are used for welding along the welding groove.

[0014] Preferably, the hair button adopts a mesh column structure made of conductive metal wires interlaced and wound.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This button-type elastic interconnect RF cable assembly forms an elastic floating conductor through the RF connection part, and utilizes the three-dimensional mesh structure of randomly interlaced buttons, combined with spring probes, to achieve an elastic interconnect design. It provides multi-dimensional displacement compensation capability and vibration and shock resistance performance far exceeding that of traditional elastic structures, which is beneficial to improving mechanical life. 2. The setting of characteristic impedance in the combination of the hair button can solve the impedance mismatch problem caused by traditional elastic elements, and can maintain the effect of low voltage standing wave ratio and low insertion loss in the DC-40GHz frequency band. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is one of the schematic diagrams showing the installation relationship between the radio frequency connector and the semi-rigid cable of the present invention; Figure 3 This is the second schematic diagram showing the installation relationship between the radio frequency connector and the semi-rigid cable of the present invention; Figure 4 This is one of the cross-sectional views showing the installation relationship between the radio frequency connector and the semi-rigid cable of the present invention; Figure 5 This is the second cross-sectional view of the installation relationship between the radio frequency connector and the semi-rigid cable of the present invention; Figure 6 This is a cross-sectional view showing the installation relationship between the radio frequency connector and the semi-rigid cable of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 1. RF connector components; 2. Semi-rigid cable; 21. Cable core; 3. RF connection part; 31. Outer end shell; 32. Inner end shell; 321. Solder hole; 33. Spring probe; 34. First insulating inner bushing; 35. Second insulating inner bushing; 36. Conductor rod; 37. Hair button; 38. Conductor end; 301. Side cavity; 302. First shaft cavity; 303. Second shaft cavity; 304. Solder groove; 305. Limiting hole. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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 1-6 The present invention will describe the above technical solution in detail through the following embodiments: This embodiment of the RF cable assembly with a snap button elastic interconnection includes a semi-rigid cable 2 with an RF connector element 1 connected to one end. The RF connector element 1 is a standard 2.92mm connector element, which is an application of existing technology and constitutes a complete RF connection structure. Specifically, an RF connection part 3 is connected to the semi-rigid cable 2 at the other end.

[0020] This embodiment uses an ultra-fine 0.8mm semi-rigid cable 2. As shown in the figure, the radio frequency connection part 3 includes an outer end shell 31 and an inner end shell 32 that are fixedly connected. Figure 6 As shown, in order to facilitate assembly, an interlocking insert structure is provided between the outer end shell 31 and the inner end shell 32, and welding holes 321 are provided at the corresponding positions, so that welding can be performed after the insert is completed to complete the sealed assembly.

[0021] Considering the need to achieve flexible contact functionality and avoid the drawbacks of rigid connections, this implementation, for example... Figures 4-6 As shown, eight evenly distributed side cavities 301 with open ends are provided along the axis on the outer end shell 31. Spring probes 33 are inserted from the inside to the outside from the side cavities 301. Taking the circuit board as the mating part as an example, the probe head can obtain local deformation function. The part that is submerged in the side cavity 301 is the spring post at the bottom of the probe.

[0022] In addition, rigid connections should be avoided in electrical connections. Therefore, in this embodiment, a first insulating inner bushing 34 and a second insulating inner bushing 35 are coaxially inserted at the axial centers of the outer end sleeve 31 and the inner end sleeve 32, respectively. At the axial centers of the first insulating inner bushing 34 and the second insulating inner bushing 35, there are... Figures 5-6 The first shaft cavity 302, the limiting hole 305, and the second shaft cavity 303 are shown in the positional relationship. In order to form a closed conductive circuit, a conductor end 38 is inserted into the limiting hole 305 along the first shaft cavity 302 from the inside to the outside. At the same time, a conductor rod 36 is fixedly installed in the second shaft cavity 303. The first shaft cavity 302 is filled with a rough button 37 so that its two ends are respectively attached to the conductor end 38 and the conductor rod 36.

[0023] In addition, such as Figure 6 The structure shown has a core groove on the side of the conductor rod 36 corresponding to the semi-rigid cable 2 to fix the cable core 21 of the semi-rigid cable 2. In order to maintain the connection reliability of the semi-rigid cable 2, while the conductor rod 36 is fixed, the semi-rigid cable 2 and the inner end sleeve 32 are fixedly welded together by welding along the welding groove 304.

[0024] It should be explained that in this embodiment, the characteristic impedance of the button 37 in the compression and rebound region within the first shaft cavity 302 is set to 50Ω, which is beneficial for obtaining stable high-frequency response capability and can solve the impedance mismatch problem caused by the elastic structure, so that it can still maintain low voltage standing wave ratio and low insertion loss in the DC-40GHz frequency band. In this embodiment, the button 37 adopts a mesh column structure made of beryllium bronze wire, molybdenum wire and nickel-chromium alloy wire interwoven. The button 37 serves as an elastic central conductor. This structure gives it both elastic deformation capability and conductivity. Through mechanical pressing, the button 37 can undergo elastic compression deformation, generating axial positive pressure, forming a tight fit with the contact surfaces at both ends, realizing a weld-free elastic floating connection.

[0025] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A button-type flexible interconnected radio frequency cable assembly, comprising a semi-rigid cable (2) with a radio frequency connector element (1) connected to one end, characterized in that: Also includes: The radio frequency connection part (3) includes a detachable outer end shell (31) and an inner end shell (32). The outer end shell (31) and the inner end shell (32) are sequentially installed inside the overall cavity of the shell, and a conductor end (38), at least one button (37) and a conductor rod (36) are installed for conductive connection. The conductor rod (36) is used to electrically connect with the other end of the semi-rigid cable (2) to form a continuous closed loop.

2. The button-type flexible interconnect RF cable assembly as described in claim 1, characterized in that: The outer end shell (31) has multiple evenly distributed side cavities (301) with open ends along the axis, and spring probes (33) are inserted into the side cavities (301) from the inside to the outside.

3. The button-type flexible interconnect RF cable assembly as described in claim 2, characterized in that: The outer end shell (31) and the inner end shell (32) are respectively coaxially fitted with a first insulating inner bushing (34) and a second insulating inner bushing (35).

4. The button-type flexible interconnect RF cable assembly as described in claim 3, characterized in that: The first insulating inner bushing (34) is provided with a first shaft cavity (302) and a limiting hole (305) that are mutually connected from the inside to the outside along the axis. The inner diameter of the limiting hole (305) is smaller than that of the first shaft cavity (302). The conductor end (38) has an inverted T-shaped cross section and is inserted into the limiting hole (305) from the inside to the outside along the first shaft cavity (302).

5. The button-type flexible interconnect RF cable assembly as described in claim 4, characterized in that: The second insulating inner bushing (35) has a second shaft cavity (303) at its shaft center, which corresponds to the position of the first shaft cavity (302), and the conductor rod (36) is fixedly installed in the second shaft cavity (303); The hair button (37) is disposed in the first shaft cavity (302) and its two ends are respectively attached to the conductor end (38) and the conductor rod (36).

6. The button-type flexible interconnect RF cable assembly as described in claim 1, characterized in that: The conductor rod (36) has a core groove on the side corresponding to the semi-rigid cable (2), and the core groove is used to insert the cable core (21) provided inside the semi-rigid cable (2).

7. The button-type flexible interconnect RF cable assembly as described in claim 5, characterized in that: The characteristic impedance of the button (37) located in the compression and rebound area within the first shaft cavity (302) is set to 50Ω±0.5Ω.

8. The button-type flexible interconnect RF cable assembly as described in claim 1, characterized in that: The inner end sleeve (32) near the end of the semi-rigid cable (2) is provided with a welding groove (304) whose inner diameter gradually increases from the inside to the outside. The semi-rigid cable (2) and the inner end sleeve (32) are used for welding along the welding groove (304).

9. The button-type flexible interconnect RF cable assembly as described in claim 1, characterized in that: The hair button (37) adopts a mesh column structure made of conductive metal wires interlaced.

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