Modularized switching female header system of high-density connector and connection method of modularized switching female header system

Abstract

The invention provides a modularized switching female header system of a high-density connector, which comprises switching female header modules welded in a PCB (Printed Circuit Board) partition, a socket frame with a guide rail, a connector plug module slidably mounted in the guide rail and a locking mechanism for connecting the frame and the PCB, wherein the terminals of the adapter female header module adopt double-contact structures with different inherent frequencies. According to the system, independent disassembly and replacement of a fault module are realized through a modular architecture, signal transient interruption caused by co-frequency resonance is avoided by utilizing a double-contact differential design, and adaptive compensation of PCB tolerance is realized in combination with a locking mechanism and an elastic gasket; the problems that an existing high-density connector is difficult to maintain, poor in vibration resistance and insufficient in locking adaptability are effectively solved, and the connection reliability and the maintenance efficiency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of electronic connector technology, and more specifically to a modular adapter pin system for high-density connectors and its connection method. Background Technology

[0002] As electronic devices become smaller and more integrated, the pin density of PCB connectors is increasing, reaching 700 pins in some applications. For such high-density interconnects, traditional solutions often involve soldering the connector entirely to the PCB. While this method provides a secure connection, it has significant drawbacks during equipment maintenance: any single pin failure or partial damage to the PCB necessitates desoldering and resoldering the entire connector. This process is not only time-consuming and labor-intensive (traditional repairs take over 30 minutes), but the high temperatures can also damage the PCB and surrounding precision components. Furthermore, it fails to meet the demands of industrial applications such as 5G base stations and high-end medical equipment, which require frequent and rapid on-site maintenance.

[0003] To improve the fault tolerance and reliability of connectors, existing technologies have undergone numerous improvements. For example, Chinese patent CN111446567B discloses a floating connector that compensates for inter-board positional tolerances using a floating bracket; Chinese patent CN208797219U discloses a dual-contact terminal that utilizes a double-spring-arm structure to enhance contact stability. However, these existing solutions still have systemic shortcomings when facing high-density and high-vibration combined scenarios: On the one hand, the above solutions are mostly integrated structures, which have the drawback that the whole structure needs to be replaced when a local pin fails. They cannot achieve independent disassembly and maintenance of the faulty area, resulting in low maintenance efficiency and high cost. On the other hand, existing dual-contact designs (CN208797219U) typically employ symmetrical structures or identical physical parameters for manufacturing convenience and cost considerations. This results in the two contacts having similar stiffness, mass, and other physical characteristics, leading to a high degree of overlap in their natural frequencies. In industrial vibration environments of 10-2000Hz, simultaneous resonance of both contacts can easily occur, causing contact failure. Actual tests show that when the natural frequency difference between the two contacts is less than 5Hz, the instantaneous disconnection rate of the connector can reach as high as 67% under swept-frequency vibration conditions, increasing the risk of signal interruption rather than decreasing it. In addition, existing locking methods mostly rely on rigid fixation, which has insufficient tolerance compensation capability. It is difficult to adaptively eliminate the thickness tolerance of the PCB board (usually with a deviation of ±0.2mm) while ensuring high reliability contact, and it is prone to loosening under long-term vibration.

[0004] Therefore, existing technologies are insufficient to meet the stringent requirements of high density, high reliability, anti-resonance, and rapid maintainability. Summary of the Invention

[0005] The technical problem to be solved by this invention is: to address the problems of existing high-density connectors, such as difficulty in overall maintenance, easy damage to PCB boards, signal interruption caused by the overlap of inherent frequencies due to the convergence of physical characteristics of the dual-contact structure, and the inability of rigid locking methods to adaptively compensate for PCB board tolerances and resist long-term vibration and loosening, a modular adapter pin system for high-density connectors and its connection method are provided.

[0006] The technical solution adopted by this invention to solve its technical problem is: A modular adapter busbar system for high-density connectors, comprising: The adapter busbar module is used for soldering and fixing to the partition position of the PCB board. The adapter busbar module includes an insulating shell and a terminal module encapsulated in the insulating shell. The socket frame has a hollow frame structure with several parallel guide rails inside. The connector plug module is slidably installed in the guide rail and fixedly connected to the socket frame. The connector plug module has a pin array that corresponds one-to-one with the terminal module. The locking mechanism is connected between the socket frame and the PCB board and is used to drive the socket frame to move towards the PCB board. Among them, the connector plug module is independently disassembled and assembled relative to the socket frame, and the adapter pin module is independently soldered relative to the PCB board, so as to realize independent replacement of the faulty area.

[0007] Furthermore, the terminal module includes a plurality of conductive terminals, each conductive terminal including a base and a first cantilever beam and a second cantilever beam extending from the base, the first cantilever beam forming a first contact and the second cantilever beam forming a second contact; The effective length of the first cantilever beam is less than the effective length of the second cantilever beam, and the width of the first cantilever beam is less than the width of the second cantilever beam, resulting in different natural frequencies between the first and second contacts.

[0008] Furthermore, the ratio of the effective length of the first cantilever beam to the effective length of the second cantilever beam, and the ratio of the width of the first cantilever beam to the width of the second cantilever beam, are all set based on the golden ratio, so that the inherent frequency difference between the first contact point and the second contact point is greater than 5Hz.

[0009] Furthermore, the locking mechanism includes a trapezoidal thread locking assembly and an elastic washer; The trapezoidal threaded locking assembly passes through the socket frame and connects to the PCB board; The elastic washer is clamped at the connection interface between the socket frame and the PCB board. The elastic washer is compressed and deformed in the locked state to generate a restoring force.

[0010] Furthermore, the trapezoidal thread locking assembly includes a locking screw and a nut, with a diamond-like carbon coating on the outer surface of the locking screw; the elastic washer is made of silicone material with a hardness of Shore A50-70 and a thickness of 1-2mm.

[0011] Furthermore, a stress relief groove is provided at the tail of the insulating shell. The stress relief groove is located at the welding surface between the insulating shell and the PCB board and is used to absorb the stress generated when the PCB board is bent.

[0012] Furthermore, the connector plug module includes a plug housing and a pin array disposed within the plug housing. The pins in the pin array are made of copper alloy and have a gold-plated layer on their surface. The thickness of the gold plating layer in the contact area is greater than that in the non-contact area.

[0013] A connection method for a modular adapter female system of a high-density connector includes the following steps: S1. Divide the pin array of the PCB board into several logic partitions, and solder the corresponding number of adapter busbar modules onto the logic partitions respectively; S2. Slide several connector plug modules into the guide rail of the socket frame in sequence and fix them in place; S3. Align the assembled socket frame with the PCB board, and drive the socket frame to move towards the PCB board by rotating the locking mechanism, so that the pin array of the connector plug module is inserted into the adapter female module and the elastic washer is compressed.

[0014] Furthermore, the system also supports modular maintenance, which includes the following steps: When the adapter female module on the PCB board malfunctions, loosen the locking mechanism, separate the socket frame and connector plug module from the PCB board, and desolder and replace the faulty adapter female module. When the connector plug module malfunctions, loosen the locking mechanism to separate the socket frame, slide the faulty connector plug module out of the guide rail, and replace it.

[0015] The beneficial effects achievable by this invention include the following: 1. By adopting a modular architecture, the adapter pin module is soldered to the partition position of the PCB board, and the connector plug module is slidably installed in the socket frame. The locking mechanism realizes the separable connection between the socket frame and the PCB board, realizing independent disassembly of the fault area and "breaking down the whole into parts" maintenance. This solves the problem that high-density connectors require overall desoldering for local faults, which leads to difficult maintenance, low efficiency and easy damage to the PCB board. It significantly reduces operation and maintenance costs and shortens downtime.

[0016] 2. By designing the dual contacts of the conductive terminals differently, the length and width of the first cantilever beam and the second cantilever beam follow the golden ratio, thus constructing a dual contact structure with a significant inherent frequency difference (e.g., not less than 20kHz). This achieves complete decoupling of modes, solves the problem of signal interruption caused by resonance under vibration environment, and ensures high reliability of connection in wideband vibration environment.

[0017] 3. By setting a trapezoidal thread locking component in conjunction with an elastic washer, the elastic washer generates a restoring force by deforming under pressure in the locked state, which realizes adaptive compensation and flexible clamping for PCB board thickness tolerance. This solves the problems of poor contact caused by PCB board warping or tolerance and loosening under long-term vibration, further improving the system's vibration resistance and connection stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the modular adapter busbar system of a high-density connector in Example 1; Figure 2 for Figure 1 Enlarged view of point a in the middle; Figure 3 This is a perspective view of the adapter busbar module in Example 1; Figure 4 This is a schematic diagram of the terminal module in Example 1; Figure 5 This is a cross-sectional view of the connector module plug in Example 1.

[0019] Reference numerals: 1. Adapter female connector module; 11. Insulating housing; 111. Stress relief groove; 12. Terminal module; 121. First cantilever beam; 122. Second cantilever beam; 2. Socket frame; 3. Connector plug module; 31. Pin array; 4. PCB board; 5. Trapezoidal thread locking mechanism; 51. Locking screw; 52. Nut; 53. Elastic washer. Detailed Implementation

[0020] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, or a physical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention. Example

[0025] This embodiment combines Figure 1-5 For further explanation, please refer to [link / reference]. Figure 1 This embodiment provides a modular adapter header system for high-density connectors. The system includes an adapter header module 1, a socket frame 2, and a connector plug module 3. This system aims to solve the problems of overall disassembly during maintenance of high-density PCBs 4 (e.g., with more than 700 pins), the problem of resonance failure of dual-contact structures under vibration, and the inability of rigid locking methods to adaptively compensate for the tolerances of PCBs 4.

[0026] The adapter busbar module 1 is the core component of this system, used for direct soldering onto a specific partition of the PCB board 4. The adapter busbar module 1 includes an insulating housing 11 and a terminal module 12 encapsulated within the insulating housing 11.

[0027] See Figure 3In this embodiment, the insulating shell 11 is made of insulating materials such as high-temperature nylon PA66 or liquid crystal polymer LCP, and a stress relief groove 111 is provided at its tail. The stress relief groove 111 is used to absorb stress through its own deformation when the PCB board 4 is bent and deformed, thereby dispersing the tensile force acting on the solder joint and preventing the solder joint from peeling off or the PCB board 4 from being damaged.

[0028] In this embodiment, the terminal module 12 includes several conductive terminals. These conductive terminals are formed from a high-elasticity copper alloy using a cold forging process. H59 brass is preferably used as a typical material for verification, exhibiting excellent elasticity and conductivity. The terminal surface undergoes zoned electroplating treatment. The gold plating thickness in the contact area is 3μm±0.3μm, and the gold plating thickness in the non-contact area is 0.5μm±0.1μm. This effectively reduces costs while ensuring contact reliability and corrosion resistance.

[0029] To address the issue of resonance caused by similar physical properties in existing dual-contact designs, each conductive terminal in this embodiment employs a differentiated dual-contact design that balances stiffness and mass.

[0030] See Figure 4 Specifically, the conductive terminals include a first cantilever beam 121 and a second cantilever beam 122 extending from the base, forming a first contact and a second contact, respectively. To fully illustrate how this embodiment achieves a frequency difference up to 20kHz through structural parameters, effectively solving the resonance problem, the design principle and calculation process are detailed below using physical formulas.

[0031] The conductive terminal contacts in this system conform to the physical model of a cantilever beam. Based on the theories of mechanics of materials and vibration, the calculation of its core physical parameters is as follows: The formula for the elastic stiffness of a cantilever beam is known to be:

[0032] The formula for structural mass is:

[0033] And the formula for the natural frequency (considering the first mode of the cantilever beam):

[0034] Where E is the elastic modulus of the material (115 x 10⁻⁶ Pa for H59 brass); ρ is the density (8500 kg / m³); L is the effective length of the cantilever beam; w is the width; t is the thickness; and meff is the equivalent mass (0.24 times the total mass of the structure).

[0035] In this embodiment, the thickness t of the two contacts is the same, both being 0.125mm, but the length L and width w follow the golden ratio (ϕ≈1.618): the parameters of the two contacts are set as follows: first contact: effective length L1=1.45mm, width w1=0.382mm; second contact: effective length 2=2.35mm, width w2=0.618mm.

[0036] Substitute the above parameters into the stiffness formula to calculate: For the first contact point:

[0037] For the second contact point:

[0038] Therefore, the stiffness ratio can be obtained:

[0039] Calculate the total structural mass of the two contacts: For the first contact point:

[0040] For the second contact point:

[0041] Substitute the stiffness and mass into the frequency formula to calculate the final natural frequency: For the second contact point:

[0042] For the first contact point:

[0043] From the above derivation, we can see that the natural frequency difference between the two contacts is:

[0044] The calculated frequency difference Δf, approximately 22kHz, is far greater than the safety threshold of 5Hz, and the natural frequencies of the two contacts, 13.5kHz and 35.5kHz, are significantly higher than the dominant frequencies (10-2000Hz) of common industrial vibration environments. This design ensures that, under wide-frequency vibration conditions, the two contacts are extremely difficult to be simultaneously excited to a resonant state due to the huge difference in their natural frequencies, thus achieving a fundamental anti-resonance effect.

[0045] When in a vibrating environment, even if one contact momentarily disconnects due to resonance, the other contact will remain in contact due to its different natural frequency. Furthermore, when the amplitude of the first contact exceeds a set threshold (e.g., 0.1 mm), the contact pressure of the second contact will automatically increase to 120% of the rated value, ensuring a conductivity greater than 99% under a 10g acceleration impact, and preventing signal transmission interruption even if a single contact momentarily fails.

[0046] See Figure 1 and Figure 2 The socket frame 2 is the modular load-bearing body of this system, used to accommodate and fix multiple connector plug modules 3, and form a mating and locking structure with the PCB board 4.

[0047] The socket frame 2 has a rectangular frame structure. Multiple parallel guide rails (not shown in the figure) are provided inside the frame, and the dimensions of these guide rails precisely match the shape of the connector plug module 3. Each connector plug module 3 can slide independently into the guide rail and be fixed inside the frame by clips or positioning pins, thus forming a neatly arranged pin array 31 within the frame. Protruding mounting ears are provided on both sides or at the four corners of the frame for installing locking mechanisms.

[0048] See Figure 2 To achieve flexible clamping and tolerance compensation between the socket frame 2 and the PCB board 4, the system is equipped with a trapezoidal thread locking mechanism 5. This trapezoidal thread locking mechanism 5 connects the socket frame 2 and the PCB board 4.

[0049] The locking screw 51 has a trapezoidal thread with a nominal diameter of 3.0 mm, a pitch of 0.5 mm, a thread angle of 30°, a clearance of 0.025 mm, a pitch diameter of 2.75 mm, and a minor diameter of 2.4 mm. The screw is made of stainless steel, solution-treated and then aged to a hardness of HRC40 or higher. The thread surface is coated with a thin layer of diamond-like carbon (DLC) with a thickness of 2-3 μm and a coefficient of friction of less than 0.1, ensuring good self-locking performance even after more than 5000 disassembly and assembly cycles. The nut 52 is made of C1100 copper and stress-relief annealed, ensuring both good electrical conductivity and sufficient mechanical strength and toughness.

[0050] The elastic washer 53 is made of silicone material, preferably with a Shore A hardness of 50-70 degrees and a thickness of 1-2 mm. The elastic washer 53 is disposed at the connection interface between the PCB board 4 and the socket frame 2, and more specifically, at the connection between the locking nut 52 and the PCB board 4.

[0051] When the trapezoidal thread locking mechanism 5 is rotated, the socket frame 2 moves all the connector plug modules 3 inside it toward the PCB board 4, causing the pins to insert into the adapter pin module 1 soldered onto the PCB board 4 and lock in place. During the locking process, the elastic washer 53 is compressed, and its restoring force can adaptively eliminate the gap between the PCB board 4 and the socket frame 2, compensate for the warping tolerance of the PCB board 4, and prevent the threads from loosening due to long-term vibration. The preload generated by the trapezoidal thread locking mechanism 5 can offset up to 50% of the additional stress caused by the bending of the PCB board 4 or external vibration, achieving flexible clamping rather than rigid locking.

[0052] See Figure 1 , Figure 2 and Figure 5 The connector plug module 3 is an assembly used to connect external cables or daughter cards, and it is installed within the socket frame 2. The connector plug module 3 includes a plug housing and a pin array 31 disposed inside the plug housing. The number and arrangement of the pin array 31 correspond one-to-one with the terminals of the adapter female module 1 soldered onto the PCB board 4. The pins are made of phosphor bronze C5191 with a gold plating thickness of 1-3 μm, forming a reliable interference fit with the terminals of the adapter female module 1.

[0053] like Figure 5 As shown, multiple connector plug modules 3 are assembled side by side in the guide rail of the socket frame 2 to form an integral plug assembly. Guide blocks can also be added to both ends of the guide rail. The guide blocks are used for pre-positioning and coarse guidance with the PCB board 4 (or its positioning holes) during system docking, ensuring that the high-density pin array 31 can be accurately inserted into the socket of the adapter female module 1, and preventing pin damage caused by alignment deviation.

[0054] Based on the above structure, the working principle and operation method of this system are as follows: S1, the pin array of the high-density PCB board 4 is divided into several logic partitions (for example, 700 pins are divided into 35 partitions of 20 pins each), and the corresponding number of adapter female modules 1 are soldered onto these partitions respectively, and the soldering is completed by wave soldering or reflow soldering process. At this time, rows of fixed female interfaces are formed on the PCB board 4.

[0055] S2, multiple connector plug modules 3 are slid sequentially into the slot guide rails inside the socket frame 2 and fixed in place. At this time, a neat array of male pins 31 is formed inside the socket frame 2.

[0056] S3, align the assembled socket frame 2 with the PCB board 4. The guide block on the socket frame 2 cooperates with the positioning structure on the PCB board 4 for pre-positioning. Slowly push the socket frame 2 so that the pin array 31 inside the frame is initially inserted into the adapter female module 1 on the PCB board 4.

[0057] S4, a trapezoidal threaded locking mechanism 5 is rotatably connected between the socket frame 2 and the PCB board 4. As the thread tightens, the socket frame 2 is pulled evenly toward the PCB board 4, and the pins are fully inserted into the female terminals. During this process, the elastic washer 53 is compressed, automatically compensating for the height tolerances of each module, ensuring good contact of all pins and no rigid stress concentration.

[0058] S5, when the system malfunctions and requires maintenance: If the female connector on PCB 4 needs repair: Loosen the trapezoidal thread locking mechanism 5 and separate the entire socket frame 2 along with all connector plug modules 3 from PCB 4. At this time, PCB 4 is fully exposed, and the faulty adapter female connector module 1 can be directly desoldered and replaced without disassembling the cable side.

[0059] If the plug on the cable side needs repair: similarly, detach the socket frame 2 from the PCB board 4. Then, slide the faulty connector plug module 3 out of the guide rail of the socket frame 2, replace it with a new plug module, and then slide it back into the guide rail.

[0060] This method reduces the traditional overall repair time of more than 30 minutes to within a few minutes. Moreover, regardless of whether the fault is on the PCB side or the cable side, it can achieve independent modular replacement, which significantly reduces maintenance costs and downtime.

[0061] Furthermore, with 12 sets of connectors from this solution configured on a single site, the maintenance efficiency is improved by approximately 70% due to the modular replacement method. Traditional overall maintenance requires 4 hours of on-site downtime, while single-module replacement using this system only takes 10 minutes (including soldering time), significantly reducing base station downtime.

[0062] Through testing and simulation verification, the golden ratio dual-contact layout described in this embodiment achieves a natural frequency difference Δf of 20kHz between the two contacts. Compared to the frequency difference of only tens of hertz in existing technologies, this solution achieves complete mode decoupling. Under typical base station vibration environments (5-1000Hz), since the fundamental frequencies of the two contacts (13.5kHz and 35.5kHz) are much higher than the environmental excitation frequency and the frequency interval between them is huge, the resonance peak is reduced by 40%, and the signal interruption rate is reduced from 15% in traditional solutions to below 0.5%. After completing 5000 cycles of vibration testing, the contact resistance fluctuation is less than 5mΩ, and the contact reliability remains above 95% of the initial level. In the thermal shock test from -40℃ to +85℃, the module showed no plastic deformation, and the solder joints showed no cracking.

[0063] System vibration testing verified that (test conditions: 10-2000Hz frequency sweep, 10g acceleration, sweep rate of one octave per minute) resulted in a signal interruption time of less than 1μs and a conductivity greater than 99.9%, meeting the MIL-STD-202G electronic component reliability verification standard. After completing 5000 cycles of vibration testing, the contact resistance fluctuation was less than 5mΩ, and the contact reliability remained above 95% of the initial level. During thermal shock testing from -40℃ to +85℃, the module showed no plastic deformation, and the solder joints showed no cracking.

[0064] In terms of materials, the terminals are cold-forged from H59 copper, reducing the scrap rate to 10%; the gold plating layer passed a 96-hour salt spray test without corrosion. The trapezoidal thread, combined with a silicone elastic washer 53, achieves a tolerance compensation of ±0.2mm, ensuring connection reliability in outdoor environments with large temperature variations and frequent vibrations. After five years of continuous operation in outdoor environments, the trapezoidal thread locking mechanism 5, combined with the elastic washer 53, still exhibits contact resistance fluctuations of less than 8mΩ, maintaining system reliability at over 92% of its initial level.

[0065] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A modular adapter female connector system for high-density connectors, characterized in that, include: The adapter busbar module is used for soldering and fixing to the partition position of the PCB board. The adapter busbar module includes an insulating shell and a terminal module encapsulated in the insulating shell. The socket frame has a hollow frame structure with several parallel guide rails inside. The connector plug module is slidably installed in the guide rail and fixedly connected to the socket frame. The connector plug module has a pin array that corresponds one-to-one with the terminal module. The locking mechanism is connected between the socket frame and the PCB board and is used to drive the socket frame to move towards the PCB board. Among them, the connector plug module is independently disassembled and assembled relative to the socket frame, and the adapter pin module is independently soldered relative to the PCB board, so as to realize independent replacement of the faulty area.

2. The modular adapter female connector system for high-density connectors according to claim 1, characterized in that, The terminal module includes a plurality of conductive terminals, each of the conductive terminals including a base and a first cantilever beam and a second cantilever beam extending from the base, the first cantilever beam forming a first contact and the second cantilever beam forming a second contact; The effective length of the first cantilever beam is less than the effective length of the second cantilever beam, and the width of the first cantilever beam is less than the width of the second cantilever beam, so that the natural frequencies of the first contact point and the second contact point are different.

3. The modular adapter female connector system for high-density connectors according to claim 2, characterized in that, The ratio of the effective length of the first cantilever beam to the effective length of the second cantilever beam, and the ratio of the width of the first cantilever beam to the width of the second cantilever beam, are both set based on the golden ratio, so that the inherent frequency difference between the first contact point and the second contact point is greater than 5kHz.

4. The modular adapter female connector system for high-density connectors according to claim 1, characterized in that, The locking mechanism includes a trapezoidal thread locking assembly and an elastic washer; The trapezoidal threaded locking assembly passes through the socket frame and is connected to the PCB board; The elastic washer is clamped at the connection interface between the socket frame and the PCB board. The elastic washer is compressed and deformed in the locked state to generate a restoring force.

5. The modular adapter female connector system for high-density connectors according to claim 4, characterized in that, The trapezoidal threaded locking assembly includes a locking screw and a nut. The outer surface of the locking screw is coated with a diamond-like carbon coating. The elastic washer is made of silicone material with a hardness of Shore A50-70 and a thickness of 1-2mm.

6. The modular adapter female connector system for high-density connectors according to claim 1, characterized in that, The insulating shell has a stress relief groove at its tail end, which is located at the welding surface between the insulating shell and the PCB board and is used to absorb the stress generated when the PCB board is bent.

7. The modular adapter female connector system for high-density connectors according to claim 1, characterized in that, The connector plug module includes a plug housing and a pin array disposed within the plug housing. The pins in the pin array are made of copper alloy and have a gold-plated layer on their surface. The thickness of the gold-plated layer in the contact area is greater than that in the non-contact area.

8. A connection method for a modular adapter female system of a high-density connector as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Divide the pin array of the PCB board into several logic partitions, and solder the corresponding number of adapter busbar modules onto the logic partitions respectively; S2. Slide several connector plug modules into the guide rail of the socket frame in sequence and fix them in place; S3. Align the assembled socket frame with the PCB board, and drive the socket frame to move toward the PCB board by rotating the locking mechanism, so that the pin array of the connector plug module is inserted into the adapter female module and the elastic washer is compressed.

9. The connection method of the modular adapter female system of the high-density connector according to claim 8, characterized in that, The system also supports modular maintenance, which includes the following steps: When the adapter female module on the PCB board malfunctions, the locking mechanism is released, and the socket frame together with the connector plug module is separated from the PCB board. The faulty adapter female module is then desoldered and replaced. When the connector plug module malfunctions, the locking mechanism is released to separate the socket frame, and the faulty connector plug module is slid out of the guide rail and replaced.

Images