Impedance-adjustable high-speed terminal structure

Abstract

The utility model discloses a kind of impedance adjustable high-speed terminal structures, it is related to high-speed terminal technical field.The impedance adjustable high-speed terminal structure, the outer shell is rectangular, the outer shell both sides are fixedly connected with mounting lug, the mounting lug is L shape, and mounting bolt is threadedly connected on the mounting lug.The impedance adjustable high-speed terminal structure, outer shell is fixed with mounting bolt through L-shaped mounting lug, adapts multiple equipment installation scene, and installation is firm and flexible;Insulating base is fixed by positioning pin and positioning hole, and assembly precision is high, effectively prevent base displacement, guarantee the relative position stability of each component, reduce the influence of vibration on terminal performance, each component is modularized assembly through mounting hole, lower mounting slot and other structure module, installation step is clear, convenient for production and assembly and later maintenance replacement, reduce assembly difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of high-speed terminal technology, and in particular to an impedance-adjustable high-speed terminal structure. Background Technology

[0002] In high-speed signal transmission fields such as 5G communication, industrial Ethernet, and server interconnection, the terminal is the core interface component for signal connection, and its impedance matching characteristics directly determine the signal transmission quality. When the terminal impedance does not match the transmission link impedance, it is easy to cause problems such as signal reflection, attenuation, and crosstalk, resulting in a decrease in transmission rate and an increase in data error rate, which seriously affects the stability of equipment operation.

[0003] Traditional high-speed terminals generally adopt a fixed impedance design, and their impedance parameters are determined during the manufacturing stage. They cannot be adjusted according to changes in the transmission link in the actual application scenario. In order to adapt to links with different impedance requirements, enterprises need to customize and develop terminals of different specifications for different scenarios, which not only increases the product design cycle and R&D costs, but also leads to a wide variety of terminal inventory, increasing management difficulty and costs.

[0004] Meanwhile, the electromagnetic shielding performance of traditional high-speed terminals is insufficient: some terminals do not have a surrounding grounding structure, making it easy for external electromagnetic interference to enter the signal transmission channel and for internal signals to radiate outward, resulting in severe signal crosstalk; although some terminals have shielding components, there are gaps between the shielding cover and the base and shell, forming "shielding loopholes" that cannot effectively block electromagnetic interference and cannot meet the requirements of high-speed signals for a low-interference environment.

[0005] In addition, traditional terminals are not convenient to assemble and maintain: some terminals use complex snap-fit ​​or welding methods to fix internal components, resulting in low assembly efficiency. During later maintenance, a large number of structures need to be disassembled to replace parts; the adjustment structure mostly adopts a knob design, which has low adjustment accuracy and is prone to grounding circuit interruption during adjustment, affecting shielding performance and signal transmission stability.

[0006] With the continuous development of high-speed signal transmission technology, the market has put forward higher requirements for the impedance adaptation flexibility, electromagnetic shielding performance, and ease of assembly and maintenance of terminals. Traditional fixed impedance, low shielding effectiveness, and complex assembly terminals can no longer meet the current industry needs. There is an urgent need for a high-speed terminal structure with flexible impedance adjustment, high-speed stable transmission, high shielding effectiveness, and convenient assembly and maintenance to solve the pain points of existing technologies. Utility Model Content

[0007] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide an impedance-adjustable high-speed terminal structure that can solve the above-mentioned problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an impedance-adjustable high-speed terminal structure, including a housing, the housing being rectangular in shape, mounting ears being fixedly connected to both sides of the housing, the mounting ears being L-shaped, and mounting bolts being threaded onto the mounting ears;

[0009] An adjustment window is provided on the outer shell, a positioning hole is provided at the bottom of the adjustment window, an insulating base is provided at the bottom of the adjustment window, a positioning hole is provided on the insulating base, and a positioning pin is inserted into the positioning hole;

[0010] The bottom inner side of the insulating base is provided with a lower mounting groove, which is rectangular in shape. The bottom of the lower mounting groove is fixedly connected with mounting holes. There are six mounting holes arranged in a matrix, and an insulating bushing is fitted into each mounting hole.

[0011] Preferably, the insulating bushing is provided with a signal pin, the signal pin is L-shaped, the top of the vertical section of the signal pin is provided with a wiring hole, the wall of the wiring hole is provided with anti-slip teeth, and there are two signal pins symmetrically distributed in the lower mounting groove.

[0012] Preferably, the insulating bushing is provided with four grounding pins arranged in a rectangular pattern around the signal pin, and the top of the grounding pins is connected to the shielding assembly on the upper layer of the insulating base.

[0013] Preferably, an upper mounting groove is provided above the insulating base, and two adjusting threaded holes are provided on the upper mounting groove. The adjusting threaded holes correspond to the signal pins, and a screw is threadedly connected to the adjusting threaded holes. A slot is provided on the top of the screw.

[0014] Preferably, the screw is provided with a movable grounding plate, the movable grounding plate is U-shaped, the movable grounding plate has a through hole at the top center, and the movable grounding plate has arc-shaped contact ends on both sides of the bottom, the arc-shaped contact ends are in contact with the surface of the signal needle.

[0015] Preferably, the movable grounding plate is fixedly connected to two sides with elastic contacts. The elastic contacts are V-shaped and there are four of them. One end of the elastic contact is fixed to the movable grounding plate by welding, and the other end of the elastic contact is in elastic contact with the surface of the grounding pin.

[0016] Preferably, an annular groove is formed on the inner side of the outer shell, and conductive foam is disposed in the annular groove. A shielding cover is disposed on the insulating base, and the shielding cover is U-shaped.

[0017] Preferably, a conductive adhesive strip is provided between the shielding cover and the insulating base, the top of the shielding cover is in contact with the conductive foam on the inner wall of the outer shell, and both sides of the shielding cover are connected to grounding pins.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) The impedance adjustable high-speed terminal structure is fixed by L-shaped mounting ears and mounting bolts, which can be adapted to various equipment installation scenarios. The installation is firm and the adjustment is flexible. The insulating base is fixed by positioning pins and positioning holes, which has high assembly accuracy, effectively prevents the base from shifting, ensures the relative position of each component is stable, and reduces the impact of vibration on the terminal performance. Each component is assembled in a modular way through mounting holes, lower mounting grooves and other structures. The installation steps are clear, which facilitates production assembly and later maintenance and replacement, and reduces assembly difficulty and cost.

[0020] (2) The impedance adjustable high-speed terminal structure is modularly assembled with each component through mounting holes, lower mounting slots and other structures. The installation steps are clear, which facilitates production assembly and later maintenance and replacement, reducing assembly difficulty and cost. The signal pin adopts an L-shaped structure. The vertical section wiring hole is combined with an anti-slip tooth design to ensure a firm cable connection and reduce contact resistance. The horizontal section serves as the signal transmission end and can make stable contact with external docking terminals, reducing signal transmission loss. The two signal pins are symmetrically distributed to realize differential signal transmission and suppress common-mode interference.

[0021] (3) The impedance-adjustable high-speed terminal structure has four grounding pins arranged in a rectangular ring around the signal pin. Together with the shielding cover, conductive foam and conductive rubber strip, it forms a fully enclosed electromagnetic shielding cavity with high shielding efficiency, which greatly reduces external electromagnetic interference and internal signal radiation, reduces signal crosstalk, and ensures the integrity of high-speed signals. The screw and the adjustment thread hole have high thread fit precision, which can realize the precise lifting and lowering of the movable grounding piece, thereby accurately adjusting the impedance. It covers the common impedance requirements of high-speed transmission, does not require customized terminals for different scenarios, adapts to multiple transmission links, and reduces design and usage costs. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of an impedance-adjustable high-speed terminal structure according to the present invention;

[0024] Figure 2 This is a cross-sectional schematic diagram of an impedance-adjustable high-speed terminal structure according to the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of an impedance-adjustable high-speed terminal structure according to the present invention.

[0026] Figure 4 This is a cross-sectional schematic diagram of an impedance-adjustable high-speed terminal structure according to the present invention.

[0027] Reference numerals: 1. Outer shell; 2. Mounting ear; 3. Mounting bolt; 4. Positioning hole; 5. Insulating base; 6. Positioning pin; 7. Lower mounting groove; 8. Mounting hole; 9. Insulating bushing; 10. Signal pin; 11. Grounding pin; 12. Upper mounting groove; 13. Adjusting threaded hole; 14. Screw; 15. Movable grounding piece; 16. Elastic contact; 17. Annular groove; 18. Conductive foam; 19. Shielding cover; 20. Conductive adhesive strip. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Please see Figure 1-4 This utility model provides a technical solution: an impedance-adjustable high-speed terminal structure, including a housing 1, which is rectangular in shape, and mounting ears 2 are fixedly connected to both sides of the housing 1. The mounting ears 2 are L-shaped, and mounting bolts 3 are threadedly connected to the mounting ears 2. The device is installed in a designated position by means of the mounting bolts 3.

[0033] An adjustment window is provided on the outer shell 1. A positioning hole 4 is provided at the bottom of the adjustment window. An insulating base 5 is provided at the bottom of the adjustment window. A positioning hole 4 is also provided on the insulating base 5. A positioning pin 6 is inserted into the positioning hole 4. The insulating base 5 is fixed by the positioning pin 6 and the positioning hole 4.

[0034] The bottom inner side of the insulating base 5 has a lower mounting groove 7, which is rectangular in shape. The bottom of the lower mounting groove 7 is fixedly connected to a mounting hole 8. There are six mounting holes 8 arranged in a matrix. An insulating bushing 9 is fitted inside each mounting hole 8. A signal pin 10 is set inside the middle insulating bushing 9. The signal pin 10 is L-shaped. The vertical section is the signal input end. The top is provided with a wiring hole for crimping with the cable conductor. The hole wall is provided with anti-slip teeth. The horizontal section is the signal transmission end. There are two signal pins 10, which are symmetrically distributed in the lower mounting groove 7.

[0035] Grounding pins 11 are provided inside the insulating bushings 9 on both sides. There are four grounding pins 11, which are distributed in a rectangle around the signal pin 10. The length of the grounding pins 11 is the same as the horizontal section of the signal pin 10, and the top is connected to the shielding component on the upper layer of the insulating base 5.

[0036] An upper mounting groove 12 is provided above the insulating base 5. Two adjusting threaded holes 13 are provided on the upper mounting groove 12. The adjusting threaded holes 13 correspond to the signal needle 10. A screw 14 is threadedly connected to the adjusting threaded holes 13. A slot is provided on the top of the screw 14.

[0037] A movable grounding plate 15 is provided on the screw 14. The movable grounding plate 15 is U-shaped and has a through hole at the top center. It is fixed to the bottom connecting section of the screw 14 by interference fit. Arc-shaped contact ends are provided on both sides of the bottom to contact the surface of the signal pin 10.

[0038] The movable grounding plate 15 is fixedly connected to two sides with elastic contacts 16. The elastic contacts 16 are V-shaped and there are four of them. One end is fixed to the movable grounding plate 15 by welding, and the other end is in elastic contact with the surface of the grounding pin 11. The two sides of the movable grounding plate 15 and the grounding pin 11 are connected through the elastic contacts 16 to form a grounding circuit.

[0039] An annular groove 17 is provided on the inner side of the outer casing 1. Conductive foam 18 is provided in the annular groove 17. A shielding cover 19 is provided on the insulating base 5. The shielding cover 19 is U-shaped. A conductive adhesive strip 20 is provided between the shielding cover 19 and the insulating base 5. The top of the shielding cover 19 contacts the conductive foam 18 on the inner wall of the outer casing 1, and the two sides are connected to the grounding pin 11.

[0040] Working principle: The L-shaped mounting ears 2 on both sides of the outer shell 1 are fixed to the designated equipment by the threaded mounting bolts 3. The mounting bolts 3 can be adjusted according to the equipment installation requirements to ensure the overall position of the terminal is stable and to avoid vibration causing structural displacement.

[0041] The positioning hole 4 at the bottom of the adjustment window of the outer shell 1 is aligned with the positioning hole 4 on the insulating base 5. The positioning pin 6 is inserted into the positioning hole 4 to achieve precise positioning and fixation of the insulating base 5 and the outer shell 1, preventing the insulating base 5 from shifting horizontally or vertically within the outer shell 1, and providing a stable foundation for the subsequent assembly and operation of various components.

[0042] The conductor of the external high-speed cable is inserted into the wiring hole of the vertical section of the signal pin 10. The anti-slip teeth on the hole wall tightly grip the cable conductor to prevent the cable from falling off and ensure a stable electrical connection. The high-speed signal is transmitted from the cable to the vertical section of the signal pin 10, transitions to the horizontal section through the L-shaped structure, and contacts the external docking terminal through the horizontal section to complete the reception and transmission of the high-speed signal.

[0043] Four grounding pins 11 are arranged in a rectangle around two signal pins 10 to form a shielding wall, reducing the impact of external electromagnetic interference on the signal pins 10. At the same time, the top of the grounding pins 11 is connected to the shielding assembly, and together with the shielding cover 19, conductive foam 18 and conductive adhesive strip 20, a complete electromagnetic shielding cavity is constructed to block the intrusion of external electromagnetic interference and suppress the electromagnetic noise radiated outward by the signal pins 10, ensuring the integrity of high-speed signal transmission.

[0044] When it is necessary to adjust the terminal impedance, use a screwdriver to insert into the slot at the top of the screw 14 and rotate it. The screw 14 achieves vertical lifting and lowering by threaded engagement with the adjustment threaded hole 13 of the mounting slot 12 on the insulating base 5. The screw 14 drives the movable grounding piece 15 with interference fit at the bottom to lift and lower synchronously, changing the relative position of the movable grounding piece 15 and the signal pin 10.

[0045] The characteristic impedance is related to the distributed capacitance and distributed inductance of the signal transmission path. When the screw 14 rotates clockwise to descend, the movable grounding plate 15 moves closer to the middle of the horizontal section of the signal pin 10, the distance between the signal pin 10 and the movable grounding plate 15 decreases, the distributed capacitance increases, and the effective length of the signal transmission path shortens, the distributed inductance decreases, and the impedance decreases. When the screw 14 rotates counterclockwise to ascend, the movable grounding plate 15 moves away from the middle of the signal pin 10, the distance increases, the distributed capacitance decreases, the distributed inductance increases, and the impedance increases, thereby achieving continuous adjustment of the impedance within a specific range.

[0046] The V-shaped elastic contacts 16 on both sides of the movable grounding plate 15 are welded and fixed to the movable grounding plate 15 at one end, and the other end is always in elastic contact with the surface of the grounding pin 11. Even if the movable grounding plate 15 is raised or lowered, the grounding circuit can be kept unobstructed, avoiding electromagnetic shielding failure or impedance change during the adjustment process, and ensuring adjustment stability.

[0047] The outer casing 1 is fixed to the mounting bolts 3 via L-shaped mounting ears 2, which can adapt to various equipment installation scenarios, ensuring a firm installation and flexible adjustment; the insulating base 5 is positioned and fixed by positioning pins 6 and positioning holes 4, which has high assembly accuracy, effectively prevents base displacement, ensures the relative position stability of each component, and reduces the impact of vibration on terminal performance.

[0048] Each component is modularly assembled using structures such as mounting holes 8 and lower mounting slots 7. The installation steps are clear, which facilitates production assembly and subsequent maintenance and replacement, reducing assembly difficulty and cost.

[0049] The signal pin 10 adopts an L-shaped structure. The vertical section wiring hole is designed with anti-slip teeth to ensure a firm cable connection and reduce contact resistance. The horizontal section serves as the signal transmission end and can make stable contact with external terminals to reduce signal transmission loss. The two signal pins 10 are symmetrically distributed to achieve differential signal transmission and suppress common-mode interference.

[0050] Four grounding pins 11 surround the signal pin 10 in a rectangular shape. Together with the shielding cover 19, conductive foam 18 and conductive adhesive strip 20, they form a fully enclosed electromagnetic shielding cavity with high shielding efficiency, which greatly reduces external electromagnetic interference and internal signal radiation, reduces signal crosstalk, and ensures the integrity of high-speed signals.

[0051] The screw 14 and the adjusting threaded hole 13 have high thread fit precision, which can realize the precise lifting and lowering of the movable grounding piece 15, thereby precisely adjusting the impedance, covering the common impedance requirements of high-speed transmission, eliminating the need to customize terminals for different scenarios, adapting to multiple transmission links, and reducing design and usage costs.

[0052] The U-shaped structure of the movable grounding piece 15 is adapted to the horizontal section of the signal pin 10, and the arc-shaped contact end ensures close contact with the signal pin 10. The impedance changes smoothly during the adjustment process without sudden changes. The V-shaped elastic contact 16 maintains the grounding circuit and avoids shielding failure during the adjustment process, further ensuring the stability of the adjustment.

[0053] Structural Description:

[0054] Outer Housing 1: The outermost protective and mounting base component for the terminals, it is rectangular in shape and forms the external frame of the entire terminal structure. The overall shape is cuboid with rounded corners. The material is engineering plastic that is resistant to high and low temperatures and chemical corrosion. The two sides extend outward to fix and connect the mounting components. A rectangular adjustment window is opened on the top, and an annular groove 17 is opened around the inside. As an external protective shell, it prevents dust, moisture and external mechanical impact from damaging the internal components, and provides installation space for the insulating base 5, shielding components, etc. The rectangular shape design is suitable for the installation layout of most equipment, and the rounded corner structure avoids scratches during operation and ensures safety during use.

[0055] Mounting Ear 2: The connecting component between the housing 1 and the external device, which is L-shaped and fixed to both sides of the housing 1. Each component consists of a horizontal section and a vertical section. The horizontal section is fixedly connected to the side wall of the housing 1, and the vertical section has threaded holes that are compatible with the mounting bolts 3. Two of these components are symmetrically distributed in the middle of both sides of the housing 1. The L-shaped structure can fit the mounting plane and side of the external device, increasing the mounting contact area and improving the fixing stability. By cooperating with the mounting bolts 3, the terminal is firmly fixed to the designated device, adapting to the installation scenarios of different devices and preventing the terminal from shifting due to vibration during use.

[0056] Mounting bolt 3: The fastening component for mounting ear 2, threadedly connected to mounting ear 2. It is a metal bolt with a hexagonal head for easy tightening with a wrench. The threaded section is treated with rust prevention to ensure long-term use without rusting. The threaded connection fixes mounting ear 2 to external equipment. The tightness can be adjusted according to installation requirements to ensure the overall terminal is firmly installed. The hexagonal head design facilitates tool operation and improves assembly efficiency. At the same time, the rust prevention treatment extends the bolt's service life and ensures long-term fixing effect.

[0057] Positioning hole 4: A positioning and mating structure for the outer shell 1 and the insulating base 5, respectively opened at the bottom of the adjustment window of the outer shell 1 and the corresponding position of the insulating base 5. The structure is cylindrical, with two openings at the bottom of the adjustment window of the outer shell 1, symmetrically distributed on both sides of the window; the insulating base 5 has two structures with the same position and size as the structure on the outer shell 1, ensuring that the two can be precisely aligned, providing an insertion channel for the positioning pin 6. Through the cooperation of the positioning pin 6 and the structure, the precise positioning of the outer shell 1 and the insulating base 5 is achieved, preventing the insulating base 5 from shifting horizontally or vertically within the outer shell 1, ensuring the relative position stability of the internal components, and laying the foundation for the subsequent functional realization.

[0058] Insulating base 5: A foundation for the installation and insulation of internal components, located at the bottom of the adjustment window of the outer casing 1. It is rectangular in shape and made of low-displacement liquid crystal polymer. A lower mounting groove 7 is formed at the bottom inside, and an upper mounting groove 12 is formed at the top. Positioning holes 4 are formed corresponding to the positioning holes 4 on the outer casing 1, and a shielding cover 19 is set on the top. Utilizing the excellent dielectric properties of the low-displacement material, dielectric loss during signal transmission is reduced, ensuring the integrity of high-speed signals. The mounting grooves provide independent installation space for signal transmission components and impedance adjustment components, achieving insulation isolation between the components and avoiding electrical interference. Simultaneously, it serves as the mounting base for the shielding cover 19, ensuring the stability of the shielding components.

[0059] Positioning pin 6: A fixing connector between the outer shell 1 and the insulating base 5, inserted into the positioning hole 4. This component is cylindrical, made of brass, and nickel-plated. One end is a conical guide head for easy insertion into the positioning hole 4, and the other end is flat to ensure it is flush with the base surface after insertion. Inserted into the positioning hole 4 of the outer shell 1 and the insulating base 5, it securely fixes both, preventing the insulating base 5 from shaking within the outer shell 1. The brass material provides sufficient strength to prevent deformation over long-term use; the nickel plating prevents rust and ensures stable positioning; the conical guide head design facilitates quick alignment and insertion during assembly, improving assembly efficiency.

[0060] Lower mounting slot 7: A mounting slot for the signal transmission components, located at the bottom inner side of the insulating base 5. This mounting slot is rectangular in shape with a flat bottom and multiple mounting holes 8 arranged in a matrix. The slot walls are smooth and burr-free, ensuring smooth component installation. It provides mounting space for the signal pin 10, grounding pin 11, and insulating bushing 9, limiting the horizontal displacement of each component through the slot structure. The rectangular shape accommodates the matrix layout of the multiple mounting holes 8, ensuring that the signal pin 10 and grounding pin 11 can be installed in their preset positions, forming a stable signal transmission and shielding structure.

[0061] Mounting Hole 8: The mounting and fixing structure for the insulating bushing 9 is located at the bottom of the lower mounting groove 7. This structure is cylindrical, with six holes arranged in a matrix. The hole walls are smooth and fit the outer diameter of the insulating bushing 9, ensuring a tight fit. This provides a precise mounting position for the insulating bushing 9. The matrix arrangement of the six holes ensures that the two in the middle correspond to the signal pins 10, and the four on either side correspond to the grounding pins 11, maintaining a fixed distance between the signal pins 10 and the grounding pins 11. This provides a structural basis for signal transmission and electromagnetic shielding; simultaneously, it limits the displacement of the insulating bushing 9, ensuring its stable insulation function.

[0062] Insulating bushing 9: An insulating isolation component between signal pin 10 and grounding pin 11, fitted into mounting hole 8. This component is tubular and made of polytetrafluoroethylene (PTFE). Three positioning ridges are evenly distributed along the axial direction on the outer wall, and it is fixed by grooves on the inner wall of mounting hole 8. PTFE has a low dielectric constant, which effectively reduces the dielectric influence on signal transmission, achieving insulation isolation between signal pin 10 and grounding pin 11, and between signal pin 10 and insulating base 5, preventing short circuits. The positioning ridges ensure that this component does not shift within mounting hole 8, maintaining the relative position stability between the pin body and this component, indirectly ensuring the spacing accuracy between signal pin 10 and grounding pin 11.

[0063] Signal pin 10: The core component for high-speed signal transmission, located within the central insulating bushing 9, consisting of two pins. This L-shaped component is made of beryllium copper and gold-plated. The vertical section has a wiring hole at the top with anti-slip teeth on the hole wall; the horizontal section is the signal transmission end and has a smooth surface. The two pins are symmetrically distributed within the lower mounting slot 7. The beryllium copper material possesses high elasticity and high conductivity, ensuring stable contact performance after long-term use; the gold plating reduces contact resistance and signal transmission loss; the vertical section's wiring hole and anti-slip teeth work together to firmly engage the external cable conductor, preventing cable detachment and ensuring stable electrical connection; the horizontal section, as the signal transmission end, contacts the external terminal to achieve high-speed signal reception and transmission; the two symmetrically distributed pins form a differential signal transmission channel, suppressing common-mode interference and adapting to high-speed signal transmission requirements.

[0064] Grounding pins 11: Electromagnetic shielding and grounding loop construction components, located within the insulating bushings 9 on both sides, four in number. These components are cylindrical, made of the same material as the signal pins 10, and gold-plated. They are arranged in a rectangular pattern around the two signal pins 10, with the top connected to the shielding cover 19, and their length matching the horizontal section of the signal pins 10. This surrounding component forms a "shielding wall," reducing the impact of external electromagnetic interference on the signal pins 10 and suppressing the outward radiation of electromagnetic noise from the signal pins 10. The top connection to the shielding cover 19 constructs a complete grounding loop, enhancing the electromagnetic shielding effect. The fixed rectangular distribution ensures a stable distance between this component and the signal pins 10, providing a basic reference for impedance adjustment and ensuring a controllable adjustment range.

[0065] Upper mounting slot 12: An installation space for the impedance adjustment component, located above the insulating base 5. This mounting slot is rectangular, with a partition at the bottom separating it from the lower mounting slot 7. Two adjusting threaded holes 13 are provided within the slot, their positions corresponding one-to-one with the signal pins 10, ensuring the impedance adjustment component can accurately act on the signal pins 10. It provides independent installation space for the screw 14 and the movable grounding plate 15, isolating them from the signal transmission components of the lower mounting slot 7 through the partition to avoid electrical interference. The rectangular design accommodates the layout of the two adjusting threaded holes 13, ensuring the impedance adjustment component can be installed in a preset position, precisely changing its relative position with the signal pins 10 to achieve impedance adjustment.

[0066] Adjusting threaded hole 13: The mounting and transmission structure of screw 14 is located on the upper mounting slot 12. This structure is cylindrical, with two internal threads adapted to screw 14, located directly above the two signal pins 10 within the upper mounting slot 12, ensuring that after installation, screw 14 can drive the movable grounding plate 15 to accurately act on the signal pins 10. The external thread of screw 14, in conjunction with the screw 14's external thread, converts the screw 14's rotational motion into vertical linear motion, achieving precise raising and lowering of screw 14 and movable grounding plate 15. The fixed thread specification ensures that for each rotation of screw 14, movable grounding plate 15 rises and falls a fixed distance, providing structural assurance for impedance adjustment accuracy.

[0067] Screw 14: The driving component for impedance adjustment, threadedly connected to the adjusting threaded hole 13. This component is a stepped cylindrical shape, made of stainless steel with a nickel-plated surface; the top is a knob section with a slotted end; the middle is a threaded section that mates with the adjusting threaded hole 13; the bottom is a connecting section for connecting to the movable grounding plate 15. The slotted knob is easy to rotate and adjust with a screwdriver, making operation convenient; the stainless steel material has high strength, preventing deformation during adjustment; the nickel plating prevents rust and ensures smooth adjustment over the long term; through the engagement of the threaded section and the adjusting threaded hole 13, the movable grounding plate 15 is driven to rise and fall, changing its relative position with the signal pin 10, thereby adjusting the impedance; the stepped structure ensures that each section functions independently, while also improving the overall structural stability.

[0068] Movable grounding plate 15: An actuator for impedance adjustment, mounted on screw 14 and in contact with the surface of signal pin 10. This component is U-shaped, made of phosphor bronze, and gold-plated. A through hole is located at the center of the top, which is fixed to the bottom section of screw 14 via an interference fit. Arc-shaped contact ends extend from both sides of the bottom, making tight contact with the surface of signal pin 10. Phosphor bronze possesses good elasticity and conductivity, ensuring tight contact between the contact ends and signal pin 10. The U-shaped structure adapts to the horizontal section of signal pin 10 and provides installation space for the elastic contact 16. As screw 14 rises and falls, the contact position between the arc-shaped contact ends and signal pin 10 changes, thereby altering the distributed capacitance and inductance of the signal transmission path, achieving impedance adjustment. The gold plating reduces contact resistance, ensuring a smooth grounding loop.

[0069] Elastic Contact 16: A grounding connection component between the movable grounding plate 15 and the grounding pin 11, fixed to both sides of the movable grounding plate 15. This component is V-shaped, made of beryllium copper, and gold-plated; there are four of them, one on each side of each movable grounding plate 15, with a suitable length and a fixed opening angle; one end is fixed to the movable grounding plate 15 by welding, and the other end makes elastic contact with the surface of the grounding pin 11. The V-shaped structure utilizes elastic deformation to ensure that the movable grounding plate 15 maintains good contact with the grounding pin 11 during the raising and lowering process, without interrupting the grounding circuit; the elastic contact avoids surface wear caused by hard friction, extending service life; the gold plating reduces contact resistance, ensures a smooth grounding circuit, avoids electromagnetic shielding failure or impedance sudden changes during adjustment, and ensures adjustment stability.

[0070] Annular groove 17: A mounting and fixing structure for the conductive foam 18, located inside the outer casing 1. This structure is a rectangular groove that surrounds the inner side of the outer casing 1, corresponding to the top of the shielding cover 19, ensuring that the conductive foam 18 can make tight contact with the shielding cover 19 after installation. It provides a precise installation position for the conductive foam 18, preventing it from shifting within the outer casing 1; the annular design ensures that the conductive foam 18 can surround the top of the shielding cover 19, achieving full contact between the shielding cover 19 and the outer casing 1, forming a complete electromagnetic shielding closed loop.

[0071] Conductive foam 18: An electromagnetic shielding connection component between the outer shell 1 and the shielding cover 19, disposed within the annular groove 17. This component is annular, made of conductive silicone, possesses a certain degree of elasticity, and is perfectly adapted to the dimensions of the annular groove 17. It fills the gap between the outer shell 1 and the shielding cover 19, achieving electrical connection between the two, constructing a complete electromagnetic shielding cavity, and blocking external electromagnetic interference from intruding through the gap; the elastic material can buffer the impact of vibration of the outer shell 1 on the shielding cover 19, while ensuring that it maintains tight contact and preserves the shielding effect even after long-term use.

[0072] Shielding Cover 19: The core component of electromagnetic shielding, located on the insulating base 5, is U-shaped. This component is a U-shaped metal shell made of tinplate with a tin-plated surface; the top is a rectangular cover plate, and the two sides are rectangular side plates; the bottom inner side of the side plates has hook-shaped buckles for connecting to the grounding pin 11; the top contacts the conductive foam 18 on the inner wall of the outer shell 1, and the bottom is attached to the conductive rubber strip 20. The U-shaped structure covers the upper mounting groove 12 of the insulating base 5, encloses the impedance adjustment component, and together with the grounding pin 11, conductive foam 18, and conductive rubber strip 20, forms a fully enclosed electromagnetic shielding cavity, reducing the impact of external electromagnetic interference on the impedance adjustment component and signal transmission component; the tinplate material has good shielding performance, and the tin-plating treatment prevents rusting; the hook-shaped buckles ensure a firm connection with the grounding pin 11, forming a grounding loop, further enhancing the shielding effect.

[0073] Conductive adhesive strip 20: A gap-filling component between the shielding cover 19 and the insulating base 5, disposed between the two. This component is a rectangular strip made of conductive silicone, with a certain degree of compressibility; its surface is smooth, and it fits tightly against the bottom of the shielding cover 19 and the insulating base 5. It fills the gap between the shielding cover 19 and the insulating base 5, eliminating shielding loopholes, ensuring the integrity of the electromagnetic shielding cavity, and preventing external electromagnetic interference from entering through the gap; the conductive silicone material enables electrical connection between the shielding cover 19 and the insulating base 5, enhancing the grounding effect, while also being elastic to adapt to assembly errors, ensuring that it maintains tight contact even after long-term use, and maintaining stable shielding performance.

[0074] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An impedance-adjustable high-speed terminal structure, comprising a housing (1), characterized in that: The outer shell (1) is rectangular in shape, and mounting ears (2) are fixedly connected to both sides of the outer shell (1). The mounting ears (2) are L-shaped, and mounting bolts (3) are threaded onto the mounting ears (2). An adjustment window is provided on the outer shell (1), a positioning hole (4) is provided at the bottom of the adjustment window, an insulating base (5) is provided at the bottom of the adjustment window, a positioning hole (4) is provided on the insulating base (5), and a positioning pin (6) is inserted into the positioning hole (4). The insulating base (5) has a lower mounting groove (7) at the bottom of its inner side. The lower mounting groove (7) is rectangular in shape. The bottom of the lower mounting groove (7) is fixedly connected to a mounting hole (8). There are six mounting holes (8) arranged in a matrix. An insulating bushing (9) is fitted inside each mounting hole (8).

2. The impedance-adjustable high-speed terminal structure according to claim 1, characterized in that: The insulating bushing (9) is provided with a signal pin (10). The signal pin (10) is L-shaped. The top of the vertical section of the signal pin (10) is provided with a wiring hole. The wall of the wiring hole is provided with anti-slip teeth. There are two signal pins (10) and they are symmetrically distributed in the lower mounting groove (7).

3. The impedance-adjustable high-speed terminal structure according to claim 2, characterized in that: The insulating bushing (9) is provided with a grounding pin (11). There are four grounding pins (11) arranged in a rectangle around the signal pin (10). The top of the grounding pin (11) is connected to the shielding assembly on the upper layer of the insulating base (5).

4. The impedance-adjustable high-speed terminal structure according to claim 3, characterized in that: An upper mounting groove (12) is provided above the insulating base (5). Two adjusting threaded holes (13) are provided on the upper mounting groove (12). The adjusting threaded holes (13) correspond to the signal needle (10). A screw (14) is threadedly connected to the adjusting threaded holes (13). A slot is provided on the top of the screw (14).

5. The impedance-adjustable high-speed terminal structure according to claim 4, characterized in that: A movable grounding plate (15) is provided on the screw (14). The movable grounding plate (15) is U-shaped. A through hole is provided at the center of the top of the movable grounding plate (15). Arc-shaped contact ends are provided on both sides of the bottom of the movable grounding plate (15). The arc-shaped contact ends are in contact with the surface of the signal needle (10).

6. The impedance-adjustable high-speed terminal structure according to claim 5, characterized in that: The movable grounding plate (15) is fixedly connected to two sides with elastic contacts (16). The elastic contacts (16) are V-shaped and there are four of them. One end of the elastic contact (16) is fixed to the movable grounding plate (15) by welding, and the other end of the elastic contact (16) is in elastic contact with the surface of the grounding pin (11).

7. The impedance-adjustable high-speed terminal structure according to claim 6, characterized in that: The outer shell (1) has an annular groove (17) on its inner side, and conductive foam (18) is provided in the annular groove (17). A shielding cover (19) is provided on the insulating base (5), and the shielding cover (19) is U-shaped.

8. The impedance-adjustable high-speed terminal structure according to claim 7, characterized in that: A conductive strip (20) is provided between the shield (19) and the insulating base (5). The top of the shield (19) is in contact with the conductive foam (18) on the inner wall of the outer shell (1). The two sides of the shield (19) are connected to the grounding pin (11).

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