A VPX plug-in board

Abstract

The application discloses a VPX plug printed board and relates to the technical field of plug printed boards.The VPX plug printed board comprises a connector shell, and a single-sided printed board is arranged on the top of the connector shell.In use, the double-sided threaded sleeve is screwed out from between the fixed threaded sleeve and the insulating threaded ring by means of an auxiliary tool, then the fixed threaded sleeve and the movable embedded sleeve are pulled out from the insulating clamping sleeve, the fixed threaded sleeve and the movable embedded sleeve of corresponding specifications are selected according to the size of the corresponding installation groove, and the fixed threaded sleeve and the movable embedded sleeve are inserted into the insulating clamping sleeve and fixed through the double-sided threaded sleeve.Under the cooperation of the grounding assembly and the installation assembly, the installation hole can be adapted to bolts of different specifications by selecting movable embedded sleeves and fixed threaded sleeves with different inner diameters according to actual needs, so that the compatibility of the VPX plug single-sided printed board in different installation scenes is greatly improved.The maintenance process is simplified, and the maintenance time and cost are reduced, and the application is flexible and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of plug printed boards, in particular to a VPX plug printed board. Background Art

[0002] A plug PCB is a printed circuit board with a connector. Its function is to connect the electronic components on the board to external devices, enabling signal and power transmission. It can come in various shapes and sizes, depending on the type of connector and the board design. The VPX plug PCB is a specific type of connector PCB based on the VPX standard. It plays a key connecting role in the VPX system architecture, adapting to high-speed signal transmission and complex system integration requirements. VPX is a high-performance, high-density interconnect standard primarily used in defense, aerospace, and industrial automation applications requiring high reliability and high bandwidth.

[0003] In the prior art, VPX plug printed circuit boards typically have circular holes in the board to secure the board during use and prevent it from shifting during insertion and removal. However, the diameter of the circular holes on the board is typically fixed, so they can only accommodate bolts of a specific diameter when installing the board. In practice, different installation scenarios require bolts of different specifications, and the fixed inner diameter of the circular holes cannot flexibly adapt to these varying requirements, resulting in inconvenient installation and even insufficient stability after installation, affecting the subsequent use of the VPX plug printed circuit board.

[0004] Therefore, we propose a VPX plug printed circuit board to solve the problems raised in the above background technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a VPX plug printed circuit board to solve the problem proposed in the above background technology that the circular holes used for installation of the VPX plug printed circuit board can only be adapted to bolts of a specific diameter during use. In actual applications, different installation scenarios require the use of bolts of different specifications. The circular holes with fixed inner diameters cannot flexibly adapt to these different requirements, resulting in inconvenience in installation and even insufficient stability, which affects the subsequent use of the VPX plug printed circuit board.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a VPX plug printed circuit board, comprising a connector housing, a single-sided printed circuit board disposed on top of the connector housing, a mounting hole formed on the top of the single-sided printed circuit board, a mounting assembly disposed within the mounting hole, and a grounding assembly disposed on the outer surface of the mounting assembly;

[0007] The mounting assembly includes an insulating ferrule, an insulating threaded ring is fixedly installed on the top of the insulating ferrule, a movable embedded sleeve is movably embedded in the interior of the insulating ferrule, a fixed threaded sleeve is fixedly installed on the top of the movable embedded sleeve, the outer surface of the fixed threaded sleeve is threadedly connected to a double-sided threaded sleeve, and four arc-shaped grooves are opened on the top of the double-sided threaded sleeve;

[0008] The grounding assembly includes a metal contact ring, a welding point is set near the top of the outer surface of the metal contact ring, the bottom of the metal contact ring is fixedly connected to a conductive ring, and a plurality of conductive columns are fixedly installed on the bottom of the conductive ring.

[0009] Preferably, movable blocks are movably embedded inside the plurality of conductive columns, movable rods are fixedly installed on the bottoms of the plurality of movable blocks, conductive covers are fixedly installed on the bottom ends of the plurality of movable rods, springs are fixedly connected to the tops of the plurality of movable blocks, and conical blocks are fixedly installed on the outer surfaces of the plurality of movable rods near the movable blocks.

[0010] Preferably, multiple sliding grooves are provided on the outer surfaces of the multiple conical blocks, adjustment grooves are provided on both sides of the multiple sliding grooves, insulating top rods are movably embedded in the interiors of the multiple sliding grooves, a first curved conductive block is fixedly installed at one end of the multiple insulating top rods, and a conductive rod is fixedly installed on the outer surfaces of the multiple first curved conductive blocks.

[0011] Preferably, a second curved conductive block is fixedly installed at one end of each of the conductive rods, a conductive hole is opened on the outer surface of each of the conductive columns, two fixed rods are fixedly installed at the other end of each of the insulating top rods, rollers are movably sleeved on the outer surfaces of each of the fixed rods, and a grounding circuit is arranged on the top of the single-sided printed circuit board near the mounting hole.

[0012] Preferably, a grounding groove is provided on the top of the connector shell, a mounting groove is provided on the bottom surface of the grounding groove, a grounding ring is fixedly installed on the bottom surface of the grounding groove, a plurality of conductive sleeves are fixedly installed on the top of the grounding ring, and the outer surfaces of the plurality of conductive columns are movably embedded in the interior of the plurality of conductive sleeves.

[0013] Preferably, the outer surface of the metal contact ring is fixedly mounted on the inner wall of the mounting hole, the bottom ends of the multiple movable rods are respectively fixed and movably penetrate the bottoms of the multiple conductive columns, one ends of the multiple springs are respectively fixedly connected to the top surfaces inside the multiple conductive columns, the outer surfaces of the multiple second curved conductive blocks are respectively movably embedded in the inside of the multiple conductive holes, and the outer surfaces of the multiple rollers are respectively movably embedded in the inside of the multiple adjustment slots.

[0014] Preferably, the top of the fixed threaded sleeve contacts the top surface inside the double-sided threaded sleeve, the outer surface of the double-sided threaded sleeve is threadedly connected to the inner wall of the insulating threaded ring, and the outer surfaces of the insulating sleeve and the insulating threaded ring are both fixedly mounted on the inner wall of the metal contact ring.

[0015] Preferably, the bottom of the double-sided threaded sleeve contacts the top of the movable embedded sleeve, a limiting ring is fixedly installed on the inner wall of the metal contact ring near the bottom, the bottom of the movable embedded sleeve contacts the top of the limiting ring, and an anti-vibration pad is fixedly connected to the bottom of the single-sided printed circuit board near the mounting hole.

[0016] A manufacturing process for a VPX plug printed circuit board includes the following steps:

[0017] The first step is to select the appropriate substrate material, then clean the substrate to remove oil and dust impurities on the surface to ensure that the substrate surface is flat and smooth;

[0018] The second step is to make a corresponding photoresist mask according to the designed printed circuit board diagram, then apply a layer of photoresist on the copper foil surface of the substrate, and then closely fit the photoresist mask to the substrate coated with photoresist, and then expose it through ultraviolet exposure equipment;

[0019] The third step is to place the substrate after pattern transfer into the etching solution. After etching is completed, the remaining photoresist is removed with a stripping solution to expose the circuit pattern.

[0020] The fourth step is to use a CNC drilling machine to drill mounting holes for fixing on the printed circuit board. During the drilling process, set appropriate drilling parameters and use a suitable drill bit.

[0021] The fifth step is to place the printed circuit board in a copper sulfate electroplating solution for electroplating, with the printed circuit board as the cathode and pure copper as the anode. Under the action of direct current, the copper ions are reduced to copper atoms by electrons at the cathode and deposited on the hole wall and circuit surface of the printed circuit board.

[0022] The sixth step is to apply the dry film solder resist to the surface of the printed circuit board by hot pressing, so that the circuit pattern surface of the printed circuit board is coated with a layer of solder resist;

[0023] The seventh step is to use screen printing technology to print the ink containing character information on the surface of the printed circuit board, and solidify the character ink by drying;

[0024] The eighth step is to use a CNC cutting machine to cut the printed circuit board from the large substrate according to the designed dimensions of the printed circuit board, and then chamfer and grind it to remove burrs and make the edges of the printed circuit board smooth.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. When the present invention is used, the anti-vibration pad can absorb vibration energy and prevent vibration from causing damage to the single-sided printed circuit board. Use auxiliary tools to unscrew the double-sided threaded sleeve from between the fixed threaded sleeve and the insulating threaded ring, then pull the fixed threaded sleeve and the movable embedded sleeve out of the insulating sleeve, select the corresponding specifications of the fixed threaded sleeve and the movable embedded sleeve according to the size of the corresponding installation groove, insert them into the insulating sleeve, and fix them with the double-sided threaded sleeve. With the cooperation of the grounding component and the installation component, the installation hole can select movable embedded sleeves and fixed threaded sleeves with different inner diameters to adapt to bolts of different specifications according to actual needs, which greatly improves the compatibility of the VPX plug single-sided printed circuit board in different installation scenarios. When the mounting bolt is damaged or lost, you only need to replace the movable embedded sleeve and fixed threaded sleeve with the corresponding inner diameter, and you can easily find the appropriate mounting bolt for reinstallation. Simplify the maintenance process, reduce maintenance time and cost, and be flexible and convenient.

[0027] 2. When the present invention is used, the single-sided printed circuit board is gently pressed downward, causing the conductive column to move downward. The conductive cover is subjected to pressure, pushing the movable rod and the tapered block upward. With the cooperation of the roller and the adjustment slot, the fixed rod and the insulating top rod are pushed outward. When the single-sided printed circuit board can no longer be pushed, a main grounding path is formed between the conductive cover, the conductive sleeve, the conductive column, the conductive ring, the metal contact ring, the welding point, and the grounding line. The first curved conductive block, the second curved conductive block, and the conductive rod form multiple auxiliary conductive contact points between the conductive column and the conductive sleeve, which is conducive to increasing the reliability of the grounding connection. In the grounding assembly, by providing multiple conductive contact points and conductive structures, a low-impedance grounding path is effectively formed, effectively reducing signal reflection and crosstalk, and forming an effective electromagnetic shield.

[0028] 3. When using the present invention, the substrate is cleaned, and then a corresponding photoresist mask is made. A layer of photoresist is applied to the copper foil surface of the substrate. The photoresist mask is tightly attached to the photoresist-coated substrate and exposed using ultraviolet light exposure equipment. Next, the substrate after pattern transfer is placed in an etching solution. Then, according to the design requirements, mounting holes are drilled on the printed circuit board. The next step is electroplating. Then, a layer of solder resist is applied to the circuit pattern surface of the printed circuit board. Then, using screen printing technology, ink containing character information such as component number, polarity mark, and printed circuit board model is printed on the surface of the printed circuit board. Finally, the printed circuit board is cut from the large substrate sheet and polished to form a single-sided printed circuit board for the VPX plug. The original VPX plug printed circuit boards were all double-sided, which increased the processing difficulty during the printed circuit board production process. The use of single-sided printed circuit boards not only saves raw materials and improves processing efficiency, but also meets the performance requirements of the electrical performance parameters such as differential impedance, insertion loss, and return loss of the signal transmission part. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of a VPX plug printed circuit board of the present invention;

[0030] Figure 2 This is a perspective view of the structure of an anti-vibration pad in a VPX plug printed circuit board of the present invention;

[0031] Figure 3 This is a perspective view of the structure of a grounding ring in a VPX plug printed circuit board of the present invention;

[0032] Figure 4 This is a schematic cross-sectional view of the structure of an installation component in a VPX plug printed circuit board of the present invention;

[0033] Figure 5 This is a perspective view of the structure of a movable embedded sleeve in a VPX plug printed circuit board of the present invention;

[0034] Figure 6 This is a schematic cross-sectional view of the structure of an insulating sleeve in a VPX plug printed circuit board of the present invention;

[0035] Figure 7 This is a schematic cross-sectional view of a portion of the structure of a connector housing in a VPX plug printed circuit board of the present invention;

[0036] Figure 8 This is a schematic cross-sectional view of the structure of a grounding component in a VPX plug printed circuit board of the present invention;

[0037] Figure 9 This is a schematic cross-sectional view of the structure of a conductive column in a VPX plug printed circuit board of the present invention;

[0038] Figure 10 This is a perspective view of the structure of an insulating ejector rod in a VPX plug printed circuit board according to the present invention;

[0039] Figure 11 This is a schematic cross-sectional view of the structure of a tapered block in a VPX plug printed circuit board of the present invention;

[0040] Figure 12 The present invention is a structural schematic diagram of a fixed threaded sleeve in a VPX plug printed circuit board.

[0041] In the picture:

[0042] 1. Connector housing; 2. Single-sided printed circuit board; 3. Mounting hole; 4. Anti-vibration pad; 5. Mounting assembly; 501. Insulating sleeve; 502. Insulating threaded ring; 503. Movable embedded sleeve; 504. Fixed threaded sleeve; 505. Double-sided threaded sleeve; 506. Arc groove; 6. Grounding assembly; 601. Metal contact ring; 602. Welding point; 603. Conductive ring; 604. Conductive column; 605. Movable block; 606. Movable Rod; 607, conductive cover; 608, spring; 609, conical block; 610, slide groove; 611, adjustment groove; 612, insulating top rod; 613, first curved surface conductive block; 614, conductive rod; 615, second curved surface conductive block; 616, conductive hole; 617, fixing rod; 618, roller; 619, grounding ring; 620, conductive sleeve; 621, limit ring; 7, grounding line; 8, grounding groove; 9, installation groove. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] Example 1: Please refer to Figures 1-12As shown, the present invention provides a technical solution: a VPX plug printed circuit board, including a connector housing 1, a single-sided printed circuit board 2 is arranged on the top of the connector housing 1, a mounting hole 3 is opened on the top of the single-sided printed circuit board 2, a mounting assembly 5 is arranged inside the mounting hole 3, and a grounding assembly 6 is arranged on the outer surface of the mounting assembly 5; the mounting assembly 5 includes an insulating sleeve 501, an insulating threaded ring 502 is fixedly installed on the top of the insulating sleeve 501, a movable embedded sleeve 503 is movably embedded in the interior of the insulating sleeve 501, a fixed threaded sleeve 504 is fixedly installed on the top of the movable embedded sleeve 503, the outer surface of the fixed threaded sleeve 504 is threadedly connected to a double-sided threaded sleeve 505, and four arc grooves 506 are opened on the top of the double-sided threaded sleeve 505; the grounding assembly 6 includes a metal contact ring 601, the metal contact ring 601 A welding point 602 is set near the top of the outer surface, a conductive ring 603 is fixedly connected to the bottom of the metal contact ring 601, and a plurality of conductive columns 604 are fixedly installed on the bottom of the conductive ring 603. The top of the fixed threaded sleeve 504 contacts the top surface inside the double-sided threaded sleeve 505, and the outer surface of the double-sided threaded sleeve 505 is threadedly connected to the inner wall of the insulating threaded ring 502. The outer surfaces of the insulating sleeve 501 and the insulating threaded ring 502 are fixedly installed on the inner wall of the metal contact ring 601, and the bottom of the double-sided threaded sleeve 505 contacts the top of the movable embedded sleeve 503. A limiting ring 621 is fixedly installed near the bottom of the inner wall of the metal contact ring 601, and the bottom of the movable embedded sleeve 503 contacts the top of the limiting ring 621. The bottom of the single-sided printed circuit board 2 is fixedly connected with an anti-vibration pad 4 near the mounting hole 3.

[0045] In this embodiment, when in use, align the mounting groove 9 with the movable embedding sleeve 503, and then press the single-sided printed circuit board 2 downward so that the anti-vibration pad 4 fits against the top of the connector housing 1. The anti-vibration pad 4 is arranged between the single-sided printed circuit board 2 and the connector housing 1 to absorb vibration energy and prevent vibration from damaging the components and circuits on the single-sided printed circuit board 2. Then screw the mounting bolts into the fixed threaded sleeve 504 and the movable embedding sleeve 503 in turn, and continue to screw them downward so that the bottom end of the mounting bolt passes through the limiting ring 621 and is screwed into the mounting groove 9, thereby fixing the single-sided printed circuit board 2 on the top of the connector housing 1 and completing the installation of the single-sided printed circuit board 2. The structure of the insulating sleeve 501 and the movable embedding sleeve 503 is as shown in FIG. Figure 5 As shown, the two are in a meshing connection state. The fixed threaded sleeve 504 and the movable embedded sleeve 503 have different sizes, such as Figure 12As shown, the diameter of the mounting groove 9 in different connector housings 1 matches the corresponding fixed threaded sleeve 504 and movable insert sleeve 503. When it is necessary to use mounting bolts of different specifications, first place the screwing tool with four arc-shaped inserts on the top of the double-sided threaded sleeve 505 so that the four arc-shaped inserts at the bottom of the screwing tool are inserted into the four arc-shaped slots 506. Then, rotate the screwing tool to rotate the double-sided threaded sleeve 505 through the engagement of the arc-shaped inserts with the arc-shaped slots 506, and screw it out from between the fixed threaded sleeve 504 and the insulating threaded ring 502. Then, slide the fixed threaded sleeve 504 upwards to pull the movable insert sleeve 503 out of the insulating sleeve 501, and then tighten it according to the corresponding Based on the size of the mounting slot 9, select the corresponding fixed threaded sleeve 504 and movable insert sleeve 503. Insert the new movable insert sleeve 503 into the insulating sleeve 501 and rotate the screwing tool in the opposite direction to screw the double-sided threaded sleeve 505 between the fixed threaded sleeve 504 and the insulating threaded ring 502. This secures the new movable insert sleeve 503 and the fixed threaded sleeve 504. Repeat the above installation steps, screwing the corresponding mounting bolts into the corresponding fixed threaded sleeve 504, movable insert sleeve 503, and mounting slot 9. By combining the grounding assembly 6 with the mounting assembly 5, the mounting hole 3 can accommodate bolts of varying sizes using movable insert sleeves 503 and fixed threaded sleeves 504 with varying inner diameters, significantly improving the compatibility of the VPX plug single-sided printed circuit board 2 in various installation scenarios. If a mounting bolt is damaged or lost, simply replace the movable insert sleeve 503 and fixed threaded sleeve 504 with the corresponding inner diameter, making it easy to find the appropriate mounting bolt for reinstallation. This simplifies the repair process, reduces repair time and costs, and ensures that the VPX plug single-sided printed circuit board 2 can be quickly restored to normal use, providing flexibility and convenience. This solves the problem that during use, the circular holes used for installation of the VPX plug printed circuit board can only accommodate bolts of a specific diameter. In actual applications, different installation scenarios require the use of bolts of different specifications. The circular holes with fixed inner diameters cannot flexibly adapt to these different requirements, resulting in inconvenient installation and even insufficient stability, which affects the subsequent use of the VPX plug printed circuit board.

[0046] Example 2: Figures 3-11As shown, the grounding component 6 includes a metal contact ring 601, a welding point 602 is set near the top of the outer surface of the metal contact ring 601, a conductive ring 603 is fixedly connected to the bottom of the metal contact ring 601, a plurality of conductive posts 604 are fixedly installed at the bottom of the conductive ring 603, and a movable block 605 is movably embedded in the interior of the plurality of conductive posts 604. A movable rod 606 is fixedly installed at the bottom of the plurality of movable blocks 605, and a conductive cover 607 is fixedly installed at the bottom end of the plurality of movable rods 606. The tops of the plurality of movable blocks 605 are fixedly connected to springs 606. 8. The outer surfaces of the multiple movable rods 606 are fixedly mounted with conical blocks 609 near the movable blocks 605. The outer surfaces of the multiple conical blocks 609 are provided with multiple slide grooves 610. The inner sides of the multiple slide grooves 610 are provided with adjustment grooves 611. The inner sides of the multiple slide grooves 610 are movably embedded with insulating top rods 612. One end of the multiple insulating top rods 612 is fixedly mounted with a first curved surface conductive block 613. The outer surfaces of the multiple first curved surface conductive blocks 613 are fixedly mounted with conductive rods 614. One end of the multiple conductive rods 614 is fixedly mounted with a second curved surface conductive block. The outer surfaces of the conductive blocks 615 and the conductive columns 604 are each provided with conductive holes 616. The other ends of the multiple insulating top rods 612 are each fixedly mounted with two fixing rods 617. The outer surfaces of the multiple fixing rods 617 are each movably provided with rollers 618. A grounding circuit 7 is provided near the mounting hole 3 on the top of the single-sided printed circuit board 2. A grounding groove 8 is provided on the top of the connector housing 1. A mounting groove 9 is provided on the bottom surface of the grounding groove 8. A grounding ring 619 is fixedly mounted on the bottom surface of the grounding groove 8. Multiple conductive sleeves 620 are fixedly mounted on the top of the grounding ring 619. The outer surfaces of the multiple conductive pillars 604 are movably embedded in the interior of the multiple conductive sleeves 620, the outer surface of the metal contact ring 601 is fixedly mounted on the inner wall of the mounting hole 3, the bottom ends of the multiple movable rods 606 are fixedly and movably penetrate the bottoms of the multiple conductive pillars 604, one end of the multiple springs 608 is fixedly connected to the top surface inside the multiple conductive pillars 604, the outer surfaces of the multiple second curved conductive blocks 615 are movably embedded in the interior of the multiple conductive holes 616, and the outer surfaces of the multiple rollers 618 are movably embedded in the interior of the multiple adjustment slots 611.

[0047] In this embodiment, when in use, a grounding circuit 7 is etched on the top of the single-sided printed circuit board 2, and the welding point 602 is welded to the corresponding point on the grounding circuit 7 by welding. When the single-sided printed circuit board 2 is pushed downward, multiple conductive pillars 604 are inserted into the conductive sleeves 620 at corresponding positions, so that the conductive cover 607 fits with the bottom surface inside the conductive sleeve 620. Then, the single-sided printed circuit board 2 is gently pressed downward to make the anti-vibration pad 4 fit with the top of the connector housing 1. At the same time, the conductive pillars 604 move downward, and the conductive cover 607 is under pressure, which pushes the movable rod 606 and the movable block 605 upward to move, so that the spring 608 is squeezed and the tapered block 609 moves upward, so that the roller 618 slides in the corresponding adjustment slot 611, pushing The fixing rod 617 and the insulating top rod 612 move outward, and the second curved conductive block 615 is pushed out of the conductive hole 616 through the first curved conductive block 613 and the conductive rod 614. When the single-sided printed circuit board 2 can no longer be pushed, the mounting bolts are tightened to fix it. At this time, the curved surface of the first curved conductive block 613 is in contact with the inner wall of the conductive column 604, and the curved surface of the second curved conductive block 615 is in contact with the inner wall of the conductive sleeve 620. The conductive cover 607 is wrapped around the bottom end of the conductive column 604, and the top of the conductive sleeve 620 is in contact with the bottom of the conductive ring 603. A primary grounding path is formed between the conductive cover 607, the conductive sleeve 620, the conductive post 604, the conductive ring 603, the metal contact ring 601, the welding point 602, and the grounding line 7. The first curved conductive block 613, the second curved conductive block 615, and the conductive rod 614 form multiple auxiliary conductive contact points between the conductive post 604 and the conductive sleeve 620, which distribute the current more evenly along the grounding path, prevent local overheating, and help increase the reliability of the grounding connection, reduce the risk of unstable connection, and ensure that the single-sided printed circuit board 2 always maintains a good grounding state. In the grounding assembly 6, by providing multiple conductive contact points and conductive structures, a low-impedance grounding path is effectively formed. When high-speed digital signals are transmitted on the single-sided printed circuit board 2, the low-impedance grounding can effectively reduce signal reflection and crosstalk, ensuring stable signal transmission. This complex grounding structure helps to form an effective electromagnetic shield. When external electromagnetic interference encounters this structure, it will be guided into the grounding path, thereby reducing interference with the internal circuits of the single-sided printed circuit board 2. At the same time, the electromagnetic radiation generated inside the single-sided printed circuit board 2 will also be confined inside by this structure to prevent interference with the outside world.

[0048] Example 3: Figures 1-12As shown, a VPX plug-in board manufacturing process includes the following steps: first, select the appropriate substrate material, then clean the substrate to remove surface dirt and dust impurities, ensure the smooth surface of the substrate; second, according to the design of the printed circuit board, make the corresponding photoresist mask, then on the copper foil surface of the substrate coated with a layer of photoresist, then the photoresist mask with the substrate coated with photoresist tightly together, then through the ultraviolet exposure equipment exposure; third, the substrate after the pattern transfer into the etching solution, etching, using the remaining photoresist removal film after liquid, expose the circuit pattern; fourth, using a numerical control drilling machine in the printed board to drill a fixed mounting hole 3, set the appropriate drilling parameters during drilling, and use the appropriate drill bit; fifth, the printed board into the copper sulfate electroplating solution for electroplating, printed board as cathode, pure copper as anode, under the action of direct current, copper ions in the cathode electron reduction to copper atoms, deposited on the printed board hole wall and circuit surface, the sixth step, by hot pressing method, dry film resist paste in the printed board surface, so that the printed circuit board pattern surface coated with a layer of resist; seventh, using silk screen printing technology, the characters containing information of ink printed on the surface of the printed board, by drying the way to make the character ink curing; eighth, according to the design of the printed board size, using numerical control cutting machine way from the printed board on the large substrate material cutting, then chamfering and polishing treatment, to remove burrs, make the printed board edge smooth.

[0049] In this embodiment, the substrate is first cleaned to remove surface impurities such as oil and dust, ensuring a smooth and even surface. This is typically done with a chemical cleaning solution, followed by a thorough rinse with deionized water. The substrate is then dried in a drying machine to prevent moisture from affecting subsequent processes. A smooth surface facilitates subsequent pattern transfer and etching, avoiding pattern defects or uneven etching caused by surface unevenness. Next, the pattern transfer operation is performed. Based on the designed single-sided printed circuit board (PCB) circuit diagram, a corresponding photoresist mask is prepared. This mask contains the pattern information for the PCB circuitry, such as the pads. A layer of photoresist is applied to the copper foil surface of the substrate. Photoresists are available in positive and negative grades. The portions of positive photoresist that dissolve after exposure represent the circuitry to be retained, while the opposite is true for negative photoresist. The photoresist mask is placed firmly against the photoresist-coated substrate, and then exposed using an ultraviolet light exposure machine. The exposure time is precisely controlled based on factors such as the photoresist's properties and the intensity of the light source. After exposure, the portions of the photoresist not blocked by the mask undergo a chemical reaction. For positive photoresist, a developer dissolves the exposed portions, leaving the unexposed circuit pattern. For negative photoresist, the developer dissolves the unexposed portions, leaving the exposed portions as the circuit pattern, which defines the circuit pattern for the subsequent etching process. Next, the substrate, after pattern transfer, is placed in an etching solution. This etching solution typically contains chemicals such as copper chloride and ferric chloride, which are corrosive to copper foil. During the etching process, parameters such as the etching solution concentration, temperature, and etching time are controlled to etch away the copper foil unprotected by the photoresist, leaving only the circuit pattern protected by the photoresist. After etching is complete, a specialized stripper is used to remove the remaining photoresist, exposing the circuit pattern and preventing residual photoresist from affecting circuit performance. Next, according to design requirements, a CNC drill is used to drill mounting holes 3 for the single-sided printed circuit board 2. High dimensional accuracy is required for the drilling process, requiring the use of appropriate drill bits and drilling parameters, such as rotation speed and feed rate, to ensure the quality of the mounting hole 3 wall for subsequent electroplating or soldering processes. The next step is electroplating to enhance conductivity and corrosion resistance and improve the performance of the printed circuit board. The printed circuit board is placed in a copper sulfate electroplating solution with the printed circuit board as the cathode and pure copper as the anode. Under the action of direct current, the copper ions are reduced to copper atoms by electrons at the cathode (the hole wall and circuit surface of the printed circuit board) and deposited on the hole wall and circuit surface. During the electroplating process, the composition, temperature, current density and electroplating time of the electroplating solution must be controlled to ensure the quality of electroplating. Then a layer of solder resist is applied to the surface of the circuit pattern of the printed circuit board. The dry film solder resist is adhered to the surface of the printed circuit board by hot pressing and other methods. Then, exposure and development operations are performed. Exposure is to make the part of the solder resist layer that needs to be retained (such as the area between the circuits, around the pads, etc.) undergo a photocuring reaction through the mask. Development is to remove the uncured solder resist part, leaving the required solder resist layer pattern.The solder mask layer primarily protects the circuits, preventing short circuits between adjacent circuits during soldering. It also provides moisture and oxidation resistance. Exposure and development techniques allow precise creation of the desired solder mask pattern. Screen printing is then used to apply ink containing information such as the component number, polarity marking, and PCB model number onto the PCB surface. The screen pattern is designed based on the desired character. A squeegee is used to apply the ink through the screen onto the PCB. After printing, the character ink is cured by natural drying or oven drying, depending on the ink's drying characteristics. The silkscreen characters facilitate subsequent component installation, commissioning, and maintenance, providing clear instructions for operators. Finally, the PCB is cut from the large substrate sheet using a CNC cutting machine or die stamping according to the designed PCB dimensions. Dimensional accuracy must be ensured during the cutting process. After cutting, the edges of the printed circuit boards (PCBs) need to be chamfered and polished to remove burrs and smooth the edges, preventing scratches on operators or other equipment during use. This improved edge treatment improves the safety and ease of assembly of the PCBs, thereby producing a single-sided PCB 2 for VPX plugs. Previous VPX plug PCBs were double-sided, requiring circuit fabrication and processing on both sides of the substrate, increasing the complexity of PCB production. The use of a single-sided PCB 2 not only reduces the amount of materials such as copper foil and solder resist used in circuit fabrication, but also reduces the number of manufacturing steps, significantly shortening the process time and improving processing efficiency. Low-loss dielectric materials are used in the production of single-sided PCBs 2, and wiring lengths are optimized to reduce signal transmission distances, thereby lowering insertion loss. Furthermore, a suitable shielding structure is provided around the signal lines to reduce signal radiation and minimize energy loss during signal transmission.

[0050] The effect and working principle of the entire mechanism are as follows: when the single-sided printed circuit board 2 is pushed downward, multiple conductive posts 604 are inserted into the conductive sleeves 620 at corresponding positions, so that the conductive cover 607 fits with the bottom surface inside the conductive sleeve 620. Then, the single-sided printed circuit board 2 is gently pressed downward to make the anti-vibration pad 4 fit with the top of the connector housing 1. At the same time, the conductive posts 604 move downward, and the conductive cover 607 is under pressure, which pushes the movable rod 606 and the movable block 605 upward to move, so that the spring 608 is squeezed. This also drives the tapered block 609 upward, causing the roller 618 to slide within the corresponding adjustment slot 611, pushing the fixed rod 617 and the insulating top rod 612 outward. The second curved conductive block 615 is then pushed out of the conductive hole 616 via the first curved conductive block 613 and the conductive rod 614. When the single-sided printed circuit board 2 can no longer be pushed, the mounting bolts are tightened, engaging the fixed threaded sleeve 504, the movable insert sleeve 503, and the mounting slot 9, securing the single-sided printed circuit board 2 to the top of the connector housing 1. At this point, the curved surface of the first curved conductive block 613 abuts the inner wall of the conductive post 604, the curved surface of the second curved conductive block 615 abuts the inner wall of the conductive sleeve 620, the conductive cover 607 wraps around the bottom end of the conductive post 604, and the top of the conductive sleeve 620 abuts the bottom of the conductive ring 603. A main grounding path is formed between the conductive cover 607, the conductive sleeve 620, the conductive column 604, the conductive ring 603, the metal contact ring 601, the welding point 602 and the grounding line 7. The first curved conductive block 613, the second curved conductive block 615 and the conductive rod 614 form multiple auxiliary conductive contact points between the conductive column 604 and the conductive sleeve 620. Under the action of the grounding component 6, a low-impedance grounding path is effectively formed, which can also reduce electromagnetic interference. Using auxiliary tools, the double-sided threaded sleeve 505 is unscrewed from between the fixed threaded sleeve 504 and the insulating threaded ring 502, and then the fixed threaded sleeve 504 is removed. According to actual needs, the movable embedded sleeve 503 and the fixed threaded sleeve 504 of different inner diameters are selected and reinserted into the insulating sleeve 501. It is fixed by the double-sided threaded sleeve 505, which can adapt to bolts of different specifications, which is flexible and convenient.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A VPX plug printed circuit board, comprising a connector housing (1), characterized in that: A single-sided printed circuit board (2) is provided on the top of the connector housing (1), a mounting hole (3) is provided on the top of the single-sided printed circuit board (2), a mounting assembly (5) is provided inside the mounting hole (3), and a grounding assembly (6) is provided on the outer surface of the mounting assembly (5); The mounting assembly (5) comprises an insulating sleeve (501), an insulating threaded ring (502) is fixedly mounted on the top of the insulating sleeve (501), a movable embedded sleeve (503) is movably embedded inside the insulating sleeve (501), a fixed threaded sleeve (504) is fixedly mounted on the top of the movable embedded sleeve (503), the outer surface of the fixed threaded sleeve (504) is threadedly connected to a double-sided threaded sleeve (505), and four arc-shaped grooves (506) are opened on the top of the double-sided threaded sleeve (505); The grounding assembly (6) comprises a metal contact ring (601), a welding point (602) is provided on the outer surface of the metal contact ring (601) near the top, a conductive ring (603) is fixedly connected to the bottom of the metal contact ring (601), and a plurality of conductive columns (604) are fixedly installed on the bottom of the conductive ring (603); The outer surface of the double-sided threaded sleeve (505) is threadably connected to the inner wall of the insulating threaded ring (502).

2. The VPX plug printed circuit board according to claim 1, characterized in that: A movable block (605) is movably embedded in the interior of each of the conductive pillars (604), a movable rod (606) is fixedly installed at the bottom of each of the movable blocks (605), a conductive cover (607) is fixedly installed at the bottom end of each of the movable rods (606), a spring (608) is fixedly connected to the top of each of the movable blocks (605), and a conical block (609) is fixedly installed on the outer surface of each of the movable rods (606) near the movable block (605).

3. The VPX plug printed circuit board according to claim 2, characterized in that: Multiple sliding grooves (610) are provided on the outer surfaces of the multiple conical blocks (609), and adjustment grooves (611) are provided on both sides of the multiple sliding grooves (610). Insulating top rods (612) are movably embedded in the interiors of the multiple sliding grooves (610), and a first curved surface conductive block (613) is fixedly installed at one end of the multiple insulating top rods (612), and a conductive rod (614) is fixedly installed on the outer surfaces of the multiple first curved surface conductive blocks (613).

4. The VPX plug printed circuit board according to claim 3, characterized in that: A second curved conductive block (615) is fixedly mounted on one end of each of the plurality of conductive rods (614), a conductive hole (616) is provided on the outer surface of each of the plurality of conductive columns (604), two fixed rods (617) are fixedly mounted on the other end of each of the plurality of insulating top rods (612), rollers (618) are movably sleeved on the outer surfaces of each of the plurality of fixed rods (617), and a grounding circuit (7) is provided on the top of the single-sided printed circuit board (2) near the mounting hole (3).

5. The VPX plug printed circuit board according to claim 4, characterized in that: A grounding slot (8) is provided on the top of the connector housing (1), a mounting slot (9) is provided on the bottom surface of the grounding slot (8), a grounding ring (619) is fixedly installed on the bottom surface of the grounding slot (8), a plurality of conductive sleeves (620) are fixedly installed on the top of the grounding ring (619), and the outer surfaces of the plurality of conductive columns (604) are movably embedded in the interior of the plurality of conductive sleeves (620).

6. The VPX plug printed circuit board according to claim 5, characterized in that: The outer surface of the metal contact ring (601) is fixedly mounted on the inner wall of the mounting hole (3); the bottom ends of the plurality of movable rods (606) are fixedly and movably penetrate the bottoms of the plurality of conductive pillars (604); one ends of the plurality of springs (608) are fixedly connected to the top surfaces inside the plurality of conductive pillars (604); the outer surfaces of the plurality of second curved surface conductive blocks (615) are movably embedded in the interiors of the plurality of conductive holes (616); and the outer surfaces of the plurality of rollers (618) are movably embedded in the interiors of the plurality of adjustment slots (611).

7. The VPX plug printed circuit board according to claim 1, characterized in that: The top of the fixed threaded sleeve (504) contacts the top surface inside the double-sided threaded sleeve (505), and the outer surfaces of the insulating sleeve (501) and the insulating threaded ring (502) are fixedly mounted on the inner wall of the metal contact ring (601).

8. The VPX plug printed circuit board according to claim 7, characterized in that: The bottom of the double-sided threaded sleeve (505) contacts the top of the movable embedded sleeve (503), a limiting ring (621) is fixedly installed on the inner wall of the metal contact ring (601) near the bottom, the bottom of the movable embedded sleeve (503) contacts the top of the limiting ring (621), and an anti-vibration pad (4) is fixedly connected to the bottom of the single-sided printed circuit board (2) near the mounting hole (3).

9. A manufacturing process for a VPX plug printed circuit board, characterized in that: The method for manufacturing the VPX plug printed circuit board according to any one of claims 1 to 8 comprises the following steps: The first step is to select the appropriate substrate material, then clean the substrate to remove oil and dust impurities on the surface to ensure that the substrate surface is flat and smooth; The second step is to make a corresponding photoresist mask according to the designed printed circuit board diagram, then apply a layer of photoresist on the copper foil surface of the substrate, and then closely fit the photoresist mask to the substrate coated with photoresist, and then expose it through ultraviolet exposure equipment; The third step is to place the substrate after pattern transfer into the etching solution. After etching is completed, the remaining photoresist is removed with a stripping solution to expose the circuit pattern. The fourth step is to use a CNC drilling machine to drill mounting holes (3) for fixing on the printed circuit board, setting appropriate drilling parameters and using a suitable drill bit during the drilling process; The fifth step is to place the printed circuit board in a copper sulfate electroplating solution for electroplating, with the printed circuit board as the cathode and pure copper as the anode. Under the action of direct current, the copper ions are reduced to copper atoms by electrons at the cathode and deposited on the hole wall and circuit surface of the printed circuit board. The sixth step is to apply the dry film solder resist to the surface of the printed circuit board by hot pressing, so that the circuit pattern surface of the printed circuit board is coated with a layer of solder resist; The seventh step is to use screen printing technology to print the ink containing character information on the surface of the printed circuit board, and solidify the character ink by drying; The eighth step is to use a CNC cutting machine to cut the printed circuit board from the large substrate according to the designed dimensions of the printed circuit board, and then chamfer and grind it to remove burrs and make the edges of the printed circuit board smooth.

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