VPX plug printed board

Abstract

The invention discloses a VPX plug printed board, which relates to the technical field of plug printed boards and comprises a connector shell, and a single-sided printed board is arranged at the top of the connector shell. When the tool is used, the double-sided threaded sleeve is screwed out between the fixed threaded sleeve and the insulating threaded ring through an auxiliary tool, then the fixed threaded sleeve and the movable embedding sleeve are pulled out from the insulating clamping sleeve, and the fixed threaded sleeve and the movable embedding sleeve of corresponding specifications are selected according to the size of a corresponding mounting groove and are inserted into the insulating clamping sleeve; and a double-sided threaded sleeve is used for fixing. Under the cooperation of the grounding assembly and the installation assembly, the installation holes can select the movable embedded sleeves and the fixed threaded sleeves with different inner diameters according to actual needs to adapt to bolts with different specifications, and the compatibility of the VPX plug single-sided printed board in different installation scenes is greatly improved. The maintenance process is simplified, the maintenance time and cost are reduced, and flexibility and convenience are achieved.

Description

Technical Field

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

[0002] A plug printed circuit board is a printed circuit board with a connector. Its function is to connect the electronic components on the circuit board to external devices to achieve signal and power transmission. It can be of various shapes and sizes, depending on the type of connector and the design of the circuit board. A VPX plug printed circuit board is a specific type of connector printed circuit board based on the VPX standard. It plays a key connection role in the VPX system architecture and can adapt to high-speed signal transmission and complex system integration requirements. VPX is a high-performance, high-density interconnection standard mainly used in fields such as national defense, aerospace, and industrial automation, where high reliability and high bandwidth application scenarios are required.

[0003] In the prior art, during the use of a VPX plug printed circuit board, round holes are usually opened on the printed circuit board for installing and fixing the printed circuit board to prevent the printed circuit board from shifting during the plugging and unplugging process. However, the aperture of the round holes on the printed circuit board is usually fixed. Therefore, when installing the printed circuit board, only bolts with a specific diameter can be adapted. In practical applications, different installation scenarios require the use of bolts of different specifications, and the round holes with a fixed inner diameter cannot flexibly adapt to these different needs, resulting in inconvenient installation and even an unstable situation after installation, affecting the subsequent use effect 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 art. Summary of the Invention

[0005] The purpose of the present invention is to provide a VPX plug printed circuit board to solve the problem that during the use of the VPX plug printed circuit board in the above background art, the round holes for installation can only adapt to bolts with a specific diameter. In practical applications, different installation scenarios require the use of bolts of different specifications, and the round holes with a fixed inner diameter cannot flexibly adapt to these different needs, resulting in inconvenient installation and even an unstable situation, affecting the subsequent use effect of the VPX plug printed circuit board.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A VPX plug printed circuit board, including a connector housing, a single-sided printed circuit board is arranged on the top of the connector housing, mounting holes are opened on the top of the single-sided printed circuit board, a mounting component is arranged inside the mounting holes, and a grounding component is arranged on the outer surface of the mounting component;

[0007] The installation component includes an insulating bushing. An insulating threaded ring is fixedly installed at the top of the insulating bushing. An activity insertion sleeve is movably embedded inside the insulating bushing. A fixed threaded sleeve is fixedly installed at the top of the activity insertion sleeve. A double-sided threaded sleeve is threadedly connected to the outer surface of the fixed threaded sleeve. Four arc-shaped grooves are formed at the top of the double-sided threaded sleeve;

[0008] The grounding component includes a metal contact ring. A welding point is arranged on the outer surface of the metal contact ring near the top. A conductive ring is fixedly connected to the bottom of the metal contact ring. A plurality of conductive posts are fixedly installed at the bottom of the conductive ring.

[0009] Preferably, activity blocks are movably embedded inside a plurality of the conductive posts. Activity rods are fixedly installed at the bottoms of the plurality of activity blocks. Conductive covers are fixedly installed at the bottom ends of the plurality of activity rods. Springs are fixedly connected to the tops of the plurality of activity blocks. Tapered blocks are fixedly installed on the outer surfaces of the plurality of activity rods near the activity blocks.

[0010] Preferably, a plurality of chutes are formed on the outer surfaces of the plurality of tapered blocks. Adjusting grooves are formed on both sides inside the plurality of chutes. Insulating ejector rods are movably embedded inside the plurality of chutes. First curved surface conductive blocks are fixedly installed at one ends of the plurality of insulating ejector rods. Conductive rods are fixedly installed on the outer surfaces of the plurality of first curved surface conductive blocks.

[0011] Preferably, second curved surface conductive blocks are fixedly installed at one ends of the plurality of conductive rods. Conductive holes are formed on the outer surfaces of the plurality of conductive posts. Two fixing rods are fixedly installed at the other ends of the plurality of insulating ejector rods. Rollers are movably sleeved on the outer surfaces of the plurality of fixing rods. 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 formed at the top of the connector housing. A mounting groove is formed on the bottom surface inside the grounding groove. A grounding ring is fixedly installed on the bottom surface inside the grounding groove. A plurality of conductive sleeves are fixedly installed at the top of the grounding ring. The outer surfaces of the plurality of conductive posts are respectively movably embedded inside the plurality of conductive sleeves.

[0013] Preferably, the outer surface of the metal contact ring is fixedly installed on the inner wall of the mounting hole. The bottom ends of the plurality of activity rods respectively penetrate through the bottoms of the plurality of conductive posts movably. One ends of the plurality of springs are respectively fixedly connected to the inner top surfaces of the plurality of conductive posts. The outer surfaces of the plurality of second curved surface conductive blocks are respectively movably embedded inside the plurality of conductive holes. The outer surfaces of the plurality of rollers are respectively movably embedded inside the plurality of adjusting grooves.

[0014] Preferably, the top of the fixed threaded sleeve is in contact with the inner top surface of 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. The outer surfaces of the insulating bushing and the insulating threaded ring are both fixedly installed on the inner wall of the metal contact ring.

[0015] Preferably, the bottom of the double-sided threaded sleeve is in contact with the top of the movable insertion sleeve. A limiting ring is fixedly installed near the bottom of the inner wall of the metal contact ring. The bottom of the movable insertion sleeve is in contact with the top of the limiting ring. 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] First step, first select a suitable substrate material, and then clean the substrate to remove oil stains and dust impurities on the surface to ensure that the substrate surface is flat and smooth.

[0018] Second step, according to the designed printed circuit board circuit diagram, make a corresponding photolithography mask. Then apply a layer of photoresist on the copper foil surface of the substrate. Then closely fit the photolithography mask with the substrate coated with photoresist, and then perform exposure through an ultraviolet exposure device.

[0019] Third step, put the substrate after pattern transfer into the etching solution. After etching is completed, use a stripping solution to remove the remaining photoresist to expose the circuit pattern.

[0020] Fourth step, use a numerical control drilling machine to drill mounting holes for fixing on the printed circuit board. Set appropriate drilling parameters during the drilling process and use a suitable drill bit.

[0021] Fifth step, put the printed circuit board into a copper sulfate electroplating solution for electroplating. Using the printed circuit board as the cathode and pure copper as the anode, under the action of direct current, copper ions gain electrons at the cathode and are reduced to copper atoms, which are deposited on the hole walls and circuit surfaces of the printed circuit board.

[0022] Sixth step, through a hot pressing method, attach a dry film solder resist to the surface of the printed circuit board so that a layer of solder resist is coated on the circuit pattern surface of the printed circuit board.

[0023] Seventh step, use screen printing technology to print the ink containing character information on the surface of the printed circuit board, and cure the character ink by drying.

[0024] Eighth step, according to the designed outer dimension of the printed circuit board, use a numerical control cutting machine to cut the printed circuit board from a large substrate sheet, and then perform chamfering and grinding treatments to remove burrs and make the edge of the printed circuit board smooth.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. When the present invention is in use, the seismic pad can absorb vibration energy to prevent the vibration from damaging the single-sided printed board. By means of an auxiliary tool, the double-sided threaded sleeve is screwed out from between the fixed threaded sleeve and the insulating threaded ring, and then the fixed threaded sleeve and the movable embedded sleeve are drawn out from the insulating bushing. According to the size of the corresponding mounting groove, the fixed threaded sleeve and the movable embedded sleeve of the corresponding specification are selected and inserted into the insulating bushing, and are fixed by the double-sided threaded sleeve. With the cooperation of the grounding component and the mounting component, the mounting hole can select movable embedded sleeves and fixed threaded sleeves with different inner diameters according to actual needs to adapt to bolts of different specifications, greatly improving the compatibility of the single-sided printed board of the VPX plug in different installation scenarios. When the mounting bolt is damaged or lost, only the movable embedded sleeve and the fixed threaded sleeve with the corresponding inner diameter need to be replaced, and it is easy to find a suitable mounting bolt for reinstallation. The maintenance process is simplified, the maintenance time and cost are reduced, and it is flexible and convenient.

[0027] 2. When the present invention is in use, gently press the single-sided printed board downward, so that the conductive column moves downward, and the conductive cover is under pressure, pushing the movable rod and the tapered block upward. With the cooperation of the roller and the adjustment groove, the fixed rod and the insulating ejector rod are pushed outward. When the single-sided printed board can no longer be pushed, a main grounding path is formed among 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 beneficial to increasing the reliability of the grounding connection. In the grounding component, by setting a plurality of 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 shielding.

[0028] 3. When the present invention is in use, the substrate is cleaned, and then the corresponding photolithography mask is made. A layer of photoresist is coated on the copper foil surface of the substrate, and the photolithography mask is closely attached to the substrate coated with the photoresist, and exposure is carried out by an ultraviolet exposure device. Secondly, the substrate after pattern transfer is put into the etching solution. Then, according to the design requirements, mounting holes are drilled on the printed board. Next, electroplating operation is carried out. Then, a layer of solder mask is coated on the circuit pattern surface of the printed board, and then, by using screen printing technology, the ink containing character information such as component numbers, polarity marks, and printed board models is printed on the surface of the printed board. Finally, the printed board is cut from the large substrate plate and polished to process it into a single-sided printed board of the VPX plug. The original VPX plug printed boards were all double-sided, which increased the processing difficulty in the process of manufacturing the printed board. Using a single-sided printed board can not only save raw materials and improve processing efficiency, but also meet the electrical performance parameters such as differential impedance, insertion loss, and return loss of the signal transmission part, and can also meet the performance requirements. Description of the Drawings

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

[0030] Figure 2 Is a three-dimensional view of the structure expansion of the anti-seismic pad in a VPX plug printed circuit board of the present invention;

[0031] Figure 3 Is a three-dimensional view of the structure expansion of the grounding ring in a VPX plug printed circuit board of the present invention;

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

[0033] Figure 5 Is a three-dimensional view of the structure expansion of the movable insertion sleeve in a VPX plug printed circuit board of the present invention;

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

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

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

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

[0038] Figure 10 Is a three-dimensional view of the structure expansion of the insulating ejector rod in a VPX plug printed circuit board of the present invention;

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

[0040] Figure 12 Is a schematic diagram of the structure of the fixed threaded sleeve in a VPX plug printed circuit board of the present invention.

[0041] In the figure:

[0042] 1. Connector housing; 2. Single-sided printed circuit board; 3. Mounting hole; 4. Anti-vibration pad; 5. Mounting assembly; 501. Insulating bushing; 502. Insulating threaded ring; 503. Movable insertion sleeve; 504. Fixed threaded sleeve; 505. Double-sided threaded sleeve; 506. Arc-shaped 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. Tapered block; 610. Slide groove; 611. Adjusting groove; 612. Insulating ejector rod; 613. First curved surface conductive block; 614. Conductive rod; 615. Second curved surface conductive block; 616. Conductive hole; 617. Fixed rod; 618. Roller; 619. Grounding ring; 620. Conductive sleeve; 621. Limit ring; 7. Grounding line; 8. Grounding groove; 9. Mounting groove. Detailed implementation manner

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment 1: Please refer to Figures 1 - 12As shown in the figure, the present invention provides a technical solution: a VPX plug printed circuit board, which includes a connector housing 1. A single-sided printed circuit board 2 is provided on the top of the connector housing 1. Installation holes 3 are provided on the top of the single-sided printed circuit board 2. An installation component 5 is arranged inside the installation holes 3, and a grounding component 6 is arranged on the outer surface of the installation component 5. The installation component 5 includes an insulating bushing 501. An insulating threaded ring 502 is fixedly installed on the top of the insulating bushing 501. An activity insertion sleeve 503 is movably embedded inside the insulating bushing 501. A fixed threaded sleeve 504 is fixedly installed on the top of the activity insertion sleeve 503. A double-sided threaded sleeve 505 is threadedly connected to the outer surface of the fixed threaded sleeve 504. Four arc-shaped grooves 506 are provided on the top of the double-sided threaded sleeve 505. The grounding component 6 includes a metal contact ring 601. A welding point 602 is arranged 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. A plurality of conductive posts 604 are fixedly installed on the bottom of the conductive ring 603. The top of the fixed threaded sleeve 504 is in contact with the inner top surface of the double-sided threaded sleeve 505. 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 both the insulating bushing 501 and the insulating threaded ring 502 are fixedly installed on the inner wall of the metal contact ring 601. The bottom of the double-sided threaded sleeve 505 is in contact with the top of the activity insertion 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 activity insertion sleeve 503 is in contact with the top of the limiting ring 621. An anti-vibration pad 4 is fixedly connected to the bottom of the single-sided printed circuit board 2 near the installation hole 3.

[0045] In this embodiment, during use, align the installation groove 9 with the activity insertion 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. By providing the anti-vibration pad 4 between the single-sided printed circuit board 2 and the connector housing 1, the vibration energy can be absorbed, preventing damage to the components and circuits on the single-sided printed circuit board 2 caused by vibration. Then, screw the installation bolts into the fixed threaded sleeve 504 and the activity insertion sleeve 503 in sequence, and continue to screw downward so that the bottom end of the installation bolt passes through the limiting ring 621 and is screwed into the installation groove 9, thereby fixedly installing 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 structures of the insulating bushing 501 and the activity insertion sleeve 503 are as Figure 5 shown, and the two are in a meshing connection state. The fixed threaded sleeve 504 and the activity insertion sleeve 503 have different specifications of dimensions, such as Figure 12As shown, the diameter dimensions of the mounting grooves 9 in different connector housings 1 match the corresponding fixed threaded sleeves 504 and movable insertion sleeves 503. When different specifications of mounting bolts are needed, first place the screwing tool with four arc-shaped inserts on 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 grooves 506. Then rotate the screwing tool. The engagement between the arc-shaped blocks and the arc-shaped grooves 506 drives the double-sided threaded sleeve 505 to rotate, and screw it out from between the fixed threaded sleeve 504 and the insulating threaded ring 502. Then slide the fixed threaded sleeve 504 upward to pull out the movable insertion sleeve 503 from the insulating sleeve 501. Next, according to the size of the corresponding mounting groove 9, select the corresponding specifications of the fixed threaded sleeve 504 and the movable insertion sleeve 503. Then insert the new movable insertion sleeve 503 into the insulating sleeve 501, and rotate the screwing tool in the reverse direction to screw the double-sided threaded sleeve 505 into the space between the fixed threaded sleeve 504 and the insulating threaded ring 502 to fix the new movable insertion sleeve 503 and the fixed threaded sleeve 504. Finally, repeat the above installation operation to screw the corresponding specification of the mounting bolt into the corresponding sized fixed threaded sleeve 504, movable insertion sleeve 503 and mounting groove 9. Through the cooperation of the grounding component 6 and the mounting component 5, the mounting hole 3 can select movable insertion sleeves 503 and fixed threaded sleeves 504 with different inner diameters according to actual needs to adapt to different specifications of bolts, greatly improving the compatibility of the VPX plug single-sided printed board 2 in different installation scenarios. When the mounting bolt is damaged or lost, only the movable insertion sleeve 503 and the fixed threaded sleeve 504 with the corresponding inner diameter need to be replaced, and it is easy to find a suitable mounting bolt for reinstallation. This simplifies the repair process, reduces the repair time and cost, ensures that the VPX plug single-sided printed board 2 can quickly return to normal use, and is flexible and convenient. It solves the problem that in the process of using the VPX plug printed board, the round hole for installation can only be adapted to bolts with a specific diameter. In practical applications, different installation scenarios require the use of bolts with different specifications, and the round hole with a fixed inner diameter cannot flexibly adapt to these different needs, resulting in inconvenient installation and even unstable situations, affecting the subsequent use effect of the VPX plug printed board.

[0046] Embodiment 2: As Figures 3 - 11As shown, the grounding component 6 includes a metal contact ring 601. A welding point 602 is provided 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. Moving blocks 605 are movably embedded inside the plurality of conductive posts 604. Moving rods 606 are fixedly installed at the bottoms of the plurality of moving blocks 605. Conductive covers 607 are fixedly installed at the bottom ends of the plurality of moving rods 606. Springs 608 are fixedly connected to the tops of the plurality of moving blocks 605. Tapered blocks 609 are fixedly installed on the outer surfaces of the plurality of moving rods 606 near the moving blocks 605. A plurality of sliding grooves 610 are formed on the outer surfaces of the plurality of tapered blocks 609. Adjusting grooves 611 are formed on both sides inside the plurality of sliding grooves 610. Insulating top rods 612 are movably embedded inside the plurality of sliding grooves 610. First curved surface conductive blocks 613 are fixedly installed at one ends of the plurality of insulating top rods 612. Conductive rods 614 are fixedly installed on the outer surfaces of the plurality of first curved surface conductive blocks 613. Second curved surface conductive blocks 615 are fixedly installed at one ends of the plurality of conductive rods 614. Conductive holes 616 are formed on the outer surfaces of the plurality of conductive posts 604. Two fixing rods 617 are fixedly installed at the other ends of the plurality of insulating top rods 612. Rollers 618 are movably sleeved on the outer surfaces of the plurality of fixing rods 617. A grounding line 7 is provided near the mounting hole 3 at the top of the single-sided printed circuit board 2. A grounding groove 8 is formed at the top of the connector housing 1. A mounting groove 9 is formed on the bottom surface inside the grounding groove 8. A grounding ring 619 is fixedly installed on the bottom surface inside the grounding groove 8. A plurality of conductive sleeves 620 are fixedly installed at the top of the grounding ring 619. The outer surfaces of the plurality of conductive posts 604 are respectively movably embedded inside the plurality of conductive sleeves 620. The outer surface of the metal contact ring 601 is fixedly installed on the inner wall of the mounting hole 3. The bottom ends of the plurality of moving rods 606 respectively movably penetrate through to the bottoms of the plurality of conductive posts 604. One ends of the plurality of springs 608 are respectively fixedly connected to the top surfaces inside the plurality of conductive posts 604. The outer surfaces of the plurality of second curved surface conductive blocks 615 are respectively movably embedded inside the plurality of conductive holes 616. The outer surfaces of the plurality of rollers 618 are respectively movably embedded inside the plurality of adjusting grooves 611.

[0047] In this embodiment, during use, a grounding line 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 line 7 by welding. When the single-sided printed circuit board 2 is pushed downward, a plurality of conductive posts 604 are inserted into the conductive sleeves 620 at corresponding positions, so that the conductive cover 607 fits against the bottom surface inside the conductive sleeve 620. Then, the single-sided printed circuit board 2 is gently pressed downward, so that the anti-vibration pad 4 fits against the top of the connector housing 1. At the same time, the conductive post 604 moves downward, and the conductive cover 607 is under pressure, which will push the movable rod 606 and the movable block 605 upward, causing the spring 608 to be squeezed, and driving the tapered block 609 upward, so that the roller 618 slides in the corresponding adjustment groove 611, pushing the fixed rod 617 and the insulating ejector rod 612 outward, and pushing the second curved conductive block 615 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 screwed to fix it. At this time, the curved surface of the first curved conductive block 613 fits against the inner wall of the conductive post 604, and the curved surface of the second curved conductive block 615 fits against the inner wall of the conductive sleeve 620. The conductive cover 607 is wrapped around the bottom end of the conductive post 604, and the top of the conductive sleeve 620 fits against the bottom of the conductive ring 603. A main grounding path is formed among 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 a plurality of auxiliary conductive contact points between the conductive post 604 and the conductive sleeve 620, making the current more evenly distributed on the grounding path, preventing local overheating, being beneficial to increasing the reliability of the grounding connection, reducing the risk of unstable connection, and ensuring that the single-sided printed circuit board 2 always maintains a good grounding state. In the grounding component 6, by arranging a plurality of 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, low-impedance grounding can effectively reduce signal reflection and crosstalk and ensure 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 to the internal circuit 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 restricted inside by this structure, preventing interference to the outside world.

[0048] Embodiment 3: As Figures 1 - 12As shown in the figure, a manufacturing process for a VPX plug printed circuit board includes the following steps: First step, first select a suitable substrate material, and then clean the substrate to remove oil stains and dust impurities on the surface to ensure that the substrate surface is flat and smooth; Second step, according to the designed printed circuit board circuit diagram, make a corresponding photolithography mask, then coat a layer of photoresist on the copper foil surface of the substrate, then closely fit the photolithography mask with the substrate coated with photoresist, and then perform exposure through an ultraviolet exposure device; Third step, put the substrate after pattern transfer into the etching solution, after etching is completed, use a stripping solution to remove the remaining photoresist to expose the circuit pattern; Fourth step, use a numerically controlled drilling machine to drill mounting holes 3 for fixing on the printed circuit board, set appropriate drilling parameters during the drilling process, and use a suitable drill bit; Fifth step, put the printed circuit board into a copper sulfate electroplating solution for electroplating. Taking the printed circuit board as the cathode and pure copper as the anode, under the action of direct current, copper ions gain electrons at the cathode and are reduced to copper atoms, which are deposited on the hole walls and circuit surfaces of the printed circuit board; Sixth step, through a hot pressing method, attach a dry film solder resist to the surface of the printed circuit board so that a layer of solder resist is coated on the circuit pattern surface of the printed circuit board; Seventh step, use screen printing technology to print the ink containing character information on the surface of the printed circuit board, and cure the character ink by drying; Eighth step, according to the designed outer shape size of the printed circuit board, use a numerically controlled cutting machine to cut the printed circuit board from the large substrate sheet, and then perform chamfering and grinding treatments to remove burrs and make the edges of the printed circuit board smooth.

[0049] In this embodiment, during use, first, the selected substrate is cleaned to remove impurities such as oil stains and dust on the surface, ensuring that the substrate surface is flat and smooth. This is usually done by cleaning with a chemical cleaning solution, then rinsing thoroughly with deionized water, and drying the substrate through a drying device to prevent moisture from affecting subsequent processes. A flat surface is conducive to subsequent pattern transfer and etching processes, avoiding pattern defects or uneven etching caused by surface unevenness. Next, the pattern transfer operation is carried out. According to the designed single-sided printed circuit board circuit diagram, a corresponding photolithography mask is made, and this mask contains graphic information such as circuits and pads on the printed circuit board. A layer of photoresist is coated on the copper foil surface of the substrate. Photoresists are divided into positive and negative types. For positive photoresist, the part that is dissolved after exposure is the part of the circuit that needs to be retained, while for negative photoresist, it is the opposite. The photolithography mask is closely attached to the substrate coated with photoresist, and then exposure is carried out through an ultraviolet exposure device. The exposure time is precisely controlled according to factors such as the characteristics of the photoresist and the intensity of the light source. After exposure, a chemical reaction occurs in the part of the photoresist not blocked by the mask. For positive photoresist, the exposed part is dissolved with a developer, leaving the unexposed circuit pattern part; for negative photoresist, the unexposed part is dissolved, leaving the exposed part as the circuit pattern, determining the circuit pattern for the subsequent etching process. Secondly, the substrate after pattern transfer is placed in an etching solution. The etching solution is usually a solution containing chemical substances such as copper chloride and ferric chloride, which has a corrosive effect on the copper foil. During the etching process, by controlling parameters such as the concentration, temperature, and etching time of the etching solution, the copper foil not protected by the photoresist is etched away, leaving only the circuit pattern part protected by the photoresist. After etching, a special stripping solution is used to remove the remaining photoresist, exposing the circuit pattern and avoiding the impact of photoresist residue on the circuit performance. Then, according to the design requirements, a numerical control drilling machine is used to drill mounting holes 3 on the printed circuit board for mounting the single-sided printed circuit board 2. The dimensional accuracy requirements for drilling are relatively high, and appropriate drills and drilling parameters such as rotational speed and feed rate need to be used to ensure the quality of the hole wall of the mounting hole 3 for subsequent processes such as electroplating or soldering. The next step is electroplating operation 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, copper ions gain electrons at the cathode (the hole wall and circuit surface of the printed circuit board) and are reduced to copper atoms, depositing on the hole wall and circuit surface. During the electroplating process, parameters such as the composition, temperature, current density, and electroplating time of the electroplating solution need to be controlled to ensure the electroplating quality. Then, a layer of solder mask is coated on the circuit pattern surface of the printed circuit board. The dry film solder mask is attached to the surface of the printed circuit board through hot pressing and other methods, and then exposure and development operations are carried out. Exposure is to make the part that needs to retain the solder mask layer (such as the area between circuits, around pads, etc.) undergo a photocuring reaction through a mask, and development is to remove the uncured part of the solder mask, leaving the required solder mask layer pattern.The solder mask is mainly used to protect the circuit traces, prevent short circuits between adjacent traces during the soldering process, and also play a certain role in moisture-proof, anti-oxidation, etc. By exposure and development, a solder mask pattern that meets the requirements can be precisely fabricated. Then, using screen printing technology, the ink containing character information such as component numbers, polarity marks, printed circuit board models, etc. is printed on the surface of the printed circuit board. The pattern of the screen is fabricated according to the character design. The ink is printed onto the printed circuit board through the screen by a squeegee. After printing, according to the drying characteristics of the ink, the character ink is cured by natural drying or baking. The screen-printed characters can facilitate subsequent component installation, debugging, and maintenance, and provide clear indication information for operators. Finally, according to the designed outer dimensions of the printed circuit board, the printed circuit board is cut from a large substrate board using a numerically controlled cutting machine or die stamping, etc. During the cutting process, the dimensional accuracy should be ensured. For the edges of the cut printed circuit board, chamfering, grinding, etc. are also required to remove burrs, make the edges of the printed circuit board smooth, prevent scratching operators or other equipment during use, and good edge treatment can improve the safety and assembly convenience of the printed circuit board, thus fabricating the single-sided printed circuit board 2 for VPX plugs. The original VPX plug printed circuit boards were all double-sided, and circuit trace fabrication and processing needed to be carried out on both sides of the substrate, increasing the processing difficulty during the printed circuit board fabrication process. Using the single-sided printed circuit board 2 not only reduces the usage amount of materials such as copper foil and solder resist used for fabricating circuit traces, but also reduces the manufacturing steps, greatly shortens the process flow time, and improves the processing efficiency. In the fabrication of the single-sided printed circuit board 2, a low-loss dielectric material is selected, and the signal transmission distance is reduced by optimizing the wiring length, thereby reducing the insertion loss. At the same time, a suitable shielding structure is set around the signal traces of the single-sided printed circuit board 2, which can reduce signal radiation and lower the energy loss of the signal during transmission.

[0050] The effects achieved by the entire mechanism and its working principle 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, causing the conductive cover 607 to fit against the bottom surface inside the conductive sleeve 620. Then, the single-sided printed circuit board 2 is gently pressed downward, causing the anti-vibration pad 4 to fit against the top of the connector housing 1. At the same time, the conductive post 604 moves downward, and the conductive cover 607 is under pressure, which will push the movable rod 606 and the movable block 605 upward, causing the spring 608 to be compressed and driving the tapered block 609 upward, causing the roller 618 to slide in the corresponding adjustment groove 611, pushing the fixed rod 617 and the insulating ejector rod 612 outward, and pushing the second curved conductive block 615 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 bolt is turned to make it enter the fixed threaded sleeve 504, the movable embedded sleeve 503, and the mounting groove 9, and the single-sided printed circuit board 2 is fixedly installed on the top of the connector housing 1. At this time, the curved surface of the first curved conductive block 613 fits against the inner wall of the conductive post 604, the curved surface of the second curved conductive block 615 fits against 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 fits against the bottom of the conductive ring 603. A main grounding path is formed among 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. Multiple auxiliary conductive contact points are formed between the conductive post 604 and the conductive sleeve 620 by the first curved conductive block 613, the second curved conductive block 615, and the conductive rod 614. Under the action of the grounding assembly 6, a low-impedance grounding path is effectively formed, and electromagnetic interference can also be reduced. By 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. The movable embedded sleeve 503 and the fixed threaded sleeve 504 with different inner diameters are selected according to actual needs and inserted into the insulating bushing 501 again, and fixed by the double-sided threaded sleeve 505, so as to 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 foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope 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 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 component (5) is arranged inside the mounting hole (3), and a grounding component (6) is arranged on the outer surface of the mounting component (5); The installation assembly (5) comprises 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 inside 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-shaped grooves (506) are opened on the top of the double-sided threaded sleeve (505); The grounding component (6) comprises a metal contact ring (601), a welding point (602) is arranged 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), and a plurality of conductive columns (604) are fixedly installed at the bottom of the conductive ring (603).

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

3. The VPX plug printed circuit board according to claim 2, characterized in that: Multiple slide 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 slide grooves (610). Insulating top rods (612) are movably embedded in the multiple slide grooves (610), and a first curved 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 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 at 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 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 installed on the bottom surface of the grounding groove (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 plurality of conductive sleeves (620), respectively.

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 respectively fixedly and movably penetrate the bottoms of the plurality of conductive pillars (604); one ends of the plurality of springs (608) are respectively fixedly connected to the top surfaces inside the plurality of conductive pillars (604); the outer surfaces of the plurality of second curved conductive blocks (615) are respectively and movably embedded inside the plurality of conductive holes (616); and the outer surfaces of the plurality of rollers (618) are respectively and movably embedded inside 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), the outer surface of the double-sided threaded sleeve (505) is threadedly connected to the inner wall of the insulating threaded ring (502), and the outer surfaces of the insulating sleeve (501) and the insulating threaded ring (502) are both 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 VPX plug printed circuit board according to any one of claims 1 to 8 is used, comprising the following steps: The first step is to select the appropriate substrate material, then clean the substrate to remove the 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 photolithography 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 photolithography 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 using a stripping solution to expose the circuit pattern. Step 4: Drill mounting holes (3) for fixing on the printed circuit board using a CNC drilling machine, setting appropriate drilling parameters and using an appropriate 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 a layer of solder resist is applied to the circuit pattern surface of the printed circuit board; Step 7: Use screen printing technology to print ink containing character information on the surface of the printed 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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