A multi-layer high-density double-sided PCB circuit board

Abstract

The utility model discloses a kind of multilayer high-density double-sided PCB circuit board, belong to circuit board technical field, including circuit board body, still include installation component;Positioning hole is opened in the four around of circuit board main body;The installation component includes base, the base is hollow structure, the base is fixed with external mounting hole by fixed screw, the base top integrally formed is provided with mounting post, the mounting post is slidably cooperated with positioning hole, the outside of the mounting post slidably sleeve joint has compression ring;The utility model is installed through setting installation component, simple structure, it is convenient and practical, can be simply and quickly installed to circuit board body, greatly reduce the difficulty of installation work, and it is convenient to dismantle maintenance in later period, and by setting compression ring and eccentric wheel and other structure cooperation use, can directly contact circuit board body and resist fixed to it, avoid screw directly contacting circuit board body to cause damage to board body.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, specifically to a multilayer high-density double-sided PCB circuit board. Background Technology

[0002] Multilayer high-density double-sided PCBs are advanced printed circuit boards designed to meet the miniaturization and high integration requirements of electronic devices. With double-sided conductive layers, they can be expanded to 2-32 layers. Precise interlayer interconnection is achieved through laser drilling and blind / buried via technology. Utilizing high-quality materials and high-precision impedance control processes, they effectively reduce signal crosstalk and loss, ensuring stable transmission of high-speed / high-frequency signals, while also exhibiting high reliability due to temperature resistance and vibration resistance. These PCBs are widely used in scenarios with extremely high requirements for circuit complexity, signal performance, and space utilization, such as 5G communication equipment, smartphones, automotive radar, and medical monitors, serving as the core carrier for realizing the complex functions of high-end electronic devices.

[0003] The PCB circuit board has positioning holes at the four corners. During installation, it is fixed to the mounting position with screws. The density of multi-layer high-density components and pads is much higher than that of traditional PCBs, which increases the difficulty of installation. In addition, the interlayer structure of multi-layer high-density PCBs is complex, and its ability to resist external impact and deformation is more sensitive than that of traditional PCBs. When using screws for fixing, the board is easily damaged. The existing technology has not solved this problem. Summary of the Invention

[0004] The purpose of this utility model is to provide a multi-layer high-density double-sided PCB circuit board. By setting up an installation component, the circuit board body can be installed simply and quickly, greatly reducing the difficulty of installation work and facilitating subsequent disassembly and maintenance. By setting up a clamping ring and eccentric wheel and other structures to work together, it can directly contact the circuit board body and clamp and fix it, avoiding damage to the board body caused by direct contact of screws with the circuit board body, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A multilayer high-density double-sided PCB circuit board includes a circuit board body and a mounting assembly. Positioning holes are provided around the main body of the circuit board; The mounting assembly includes a base with a hollow structure. The base is fixed to an external mounting hole by fixing screws. An integrally formed mounting post is provided on the top of the base. The mounting post slides into a positioning hole. A clamping ring is slidably sleeved on the outer side of the mounting post. Rotating grooves are provided on both sides of the top of the mounting post. An eccentric roller is provided in the rotating groove. The eccentric roller is rotatably connected to the rotating groove through a rotating shaft. The eccentric roller is eccentrically arranged with respect to the rotating shaft.

[0006] Preferably, the fixing screw is slidably installed inside the base and can rotate inside the base, the base is located at the bottom of the circuit board body, and the clamping ring is located at the top of the circuit board body.

[0007] Preferably, a rotating arm is fixedly installed on one side of the eccentric roller, and the rotating arm is rotatably engaged with the rotating groove.

[0008] Preferably, a rubber pad is glued to the bottom of the clamping ring, and the two sides of the clamping ring are integrally formed and disposed on two sets of fixing seats.

[0009] Preferably, the top of the fixed base is provided with a snap-fit ​​groove, which snaps into the rotating arm.

[0010] Preferably, the bottom sides of the rotating arm are integrally formed with snap-fit ​​blocks, which snap into snap-fit ​​slots.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a simple and convenient installation component, allowing for quick and easy installation of the circuit board, significantly reducing the difficulty of installation and facilitating subsequent disassembly and maintenance. The use of a clamping ring and eccentric wheel allows for direct contact and secure fixing of the circuit board, preventing damage from direct contact between screws and the board. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the component structure. Figure 3 This is a schematic diagram of the cross-sectional structure of the base and mounting column.

[0013] In the diagram: 1. Circuit board body; 2. Positioning hole; 3. Base; 4. Fixing screw; 5. Mounting post; 6. Pressure ring; 7. Rotating groove; 8. Eccentric roller; 9. Rotating shaft; 10. Rotating arm; 11. Rubber pad; 12. Fixing seat; 13. Snap-fit ​​groove; 14. Snap-fit ​​block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-3This utility model provides a technical solution: A multilayer high-density double-sided PCB circuit board includes a circuit board body 1. The circuit board body 1 adopts a multilayer structure with double-sided base conductive layers, which can be expanded to 2-32 layers according to actual functional requirements. Interconnection between layers is achieved through high-precision vias made by laser drilling technology. The minimum hole diameter can adapt to high-density layout requirements, while supporting blind and buried via design to reduce signal interference and ensure the stability of high-speed / high-frequency signal transmission. The circuit board body uses high-quality substrate with good temperature resistance and vibration resistance, and can be adapted to harsh application scenarios such as 5G communication, automotive electronics, and medical equipment. The circuit board body 1 has high-density component pads and fine lines evenly distributed on both sides, and the line width and spacing can be controlled with high precision, which can accommodate complex circuit modules in a limited board space. In the surrounding area of ​​the circuit board body, positioning holes 2 are pre-set to match the mounting components. The positioning holes 2 are made with high-precision processing technology to ensure accurate matching with the external mounting structure, providing a basis for the stable assembly of the circuit board as a whole, while not affecting the layout and electrical performance of the internal circuits and components.

[0016] It also includes an installation component, which includes a base 3. The base 3 has a hollow structure and is fixed to the external mounting holes by fixing screws 4. An integrally formed mounting post 5 is provided on the top of the base 3. The mounting post 5 has a hollow structure and slides with the positioning hole 2. A clamping ring 6 is slidably sleeved on the outside of the mounting post 5. Rotating grooves 7 are opened on both sides of the top of the mounting post 5. An eccentric roller 8 is provided in the rotating groove 7. The eccentric roller 8 is rotatably connected to the rotating groove 7 by a rotating shaft 9. The eccentric roller 8 and the rotating shaft 9 are eccentrically arranged. The fixing screws 4 are slidably installed inside the base 3 and can rotate inside the base 3. The base 3 is set at the bottom of the circuit board body 1. The clamping ring 6 is set at the top of the circuit board body 1. A rotating arm 10 is fixedly installed on one side of the eccentric roller 8. The rotating arm 10 rotates with the rotating groove 7. A rubber pad 11 is glued to the bottom of the clamping ring 6.

[0017] By setting up the mounting components, the circuit board body can be installed simply and quickly. The hollow base 3 provides a clever space for the fixing screws 4, allowing them to rotate flexibly inside the base 3 and achieve a stable connection with the external mounting holes. This lays a solid foundation for the entire mounting assembly and avoids the fixing screws 4 directly contacting the circuit board body, preventing wear. The top of the base 3 is integrally formed with the mounting post 5. This integrated design enhances the stability of the structure. The mounting post 5 and the positioning holes 2 around the circuit board body 1 are precisely matched, enabling smooth sliding and precise positioning during installation. The clamping ring 6 is tightly slidably sleeved on the outside of the mounting post 5, transmitting the downward pressure of the eccentric roller 8 to firmly fix the circuit board body 1. Rotary holes are opened on both sides of the top of the mounting post 5. The rotating groove 7 provides the necessary conditions for the installation of the eccentric roller 8. The eccentric roller 8 is rotatably connected to the rotating groove 7 through the rotating shaft 9, and the eccentric roller 8 and the rotating shaft 9 are eccentrically arranged. This unique eccentric design is the key to the fixing and releasing of the circuit board. A rotating arm 10 is fixedly installed on one side of the eccentric roller 8. The rotating arm 10 can rotate freely in the rotating groove 7, providing a convenient point of force for operating the eccentric roller 8. When the circuit board body 1 needs to be disassembled and maintained later, the staff only needs to rotate the eccentric roller 8 in the opposite direction. The force between the eccentric roller 8 and the clamping ring 6 gradually decreases. After the clamping ring 6 loses the pressure of the eccentric roller 8, it can easily slide upward and release the clamping state on the circuit board body 1. At this time, the circuit board body 1 can be easily removed from the mounting post 5 for subsequent maintenance, repair or replacement operations.

[0018] The two sides of the clamping ring 6 are integrally formed on two sets of fixed seats 12. The top of the fixed seat 12 is provided with a snap-fit ​​groove 13, which snaps with the rotating arm 10. The bottom sides of the rotating arm 10 are integrally formed with snap-fit ​​blocks 14, which snap with the snap-fit ​​groove 13.

[0019] By setting the fixing seat 12, the rotating arm 10 can be fixed by the snap-fit ​​groove 13 and the snap-fit ​​block 14, preventing the eccentric roller 8 from loosening after installation, thereby improving the stable clamping force for the circuit board body 1; and the rotating arm 10 can be unlocked without the aid of tools by the snap-fit ​​block 14 and the snap-fit ​​groove 13, which greatly reduces the difficulty of disassembling the circuit board body 1 during later maintenance.

[0020] In practical use, move the device to the designated position. First, lift the base 3 and align the fixing screws 4 inside the base 3 with the external mounting holes. Use a screwdriver or other tools to rotate the fixing screws 4 until they are tightly engaged with the mounting holes, thus firmly fixing the base 3 in the desired position. Next, align the positioning holes 2 around the circuit board body 1 with the mounting posts 5 on the top of the base 3. Slowly and steadily move the circuit board body 1 downwards so that the mounting posts 5 can be smoothly inserted into the positioning holes 2. Then, move the clamping ring 6 to align with the mounting posts 5 and slide it downwards along the mounting posts 5, gradually bringing it closer to the circuit board body 1. At this time, the rubber pad 11 at the bottom of the clamping ring 6 will gently contact the surface of the circuit board, avoiding potential damage from hard contact. Subsequently, rotate the rotating arm 10 on one side of the eccentric roller 8. The rotating arm 10 drives the eccentric roller 8 to rotate around the rotating shaft 9. Because the eccentric roller 8 is eccentrically arranged with the rotating shaft 9, during the rotation, the eccentric roller 8 will gradually approach the clamping ring 6 and apply downward pressure to the clamping ring 6. As the eccentric roller 8 rotates, the pressure on the clamping ring 6 increases. As the size of the rubber pad 11 increases, the contact between the rubber pad 11 and the surface of the circuit board becomes increasingly tighter, thus firmly fixing the circuit board body 1 to the base 3. When the rotating arm 10 rotates to a certain position, the locking blocks 14 on both sides of the bottom of the rotating arm 10 fit precisely into the locking grooves 13 on the top of the fixing seat 12, firmly locking the rotating arm 10 and preventing the eccentric roller 8 from loosening after installation, ensuring that the circuit board body 1 can be continuously and stably fixed. When it is necessary to disassemble and maintain the circuit board body 1, the rotating arm 10 is moved so that the rotating arm 1... The bottom locking block 14 disengages from the locking groove 13 at the top of the fixed base 12, releasing the lock on the rotating arm 10. Then, the rotating arm 10 is rotated in the opposite direction, causing the eccentric roller 8 to rotate in the opposite direction. As the eccentric roller 8 rotates in the opposite direction, the force between the eccentric roller 8 and the clamping ring 6 gradually decreases, and the pressure on the clamping ring 6 also decreases. By rotating the eccentric roller 8 and the rotating arm 10 and storing them inside the mounting post 5, the circuit board body 1 can be easily lifted from the mounting post 5, completing the disassembly operation.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multilayer high-density double-sided PCB circuit board, comprising a circuit board body (1), characterized in that: It also includes installation components; Positioning holes (2) are provided around the main body of the circuit board. The mounting assembly includes a base (3), which is a hollow structure. The base (3) is fixed to the external mounting hole by fixing screws (4). The top of the base (3) is integrally formed with a mounting post (5). The mounting post (5) is slidably engaged with the positioning hole (2). A clamping ring (6) is slidably sleeved on the outside of the mounting post (5). Rotating grooves (7) are opened on both sides of the top of the mounting post (5). An eccentric roller (8) is provided in the rotating groove (7). The eccentric roller (8) is rotatably connected to the rotating groove (7) through a rotating shaft (9). The eccentric roller (8) and the rotating shaft (9) are eccentrically arranged.

2. The multilayer high-density double-sided PCB circuit board according to claim 1, characterized in that: The fixing screw (4) is slidably installed inside the base (3) and can rotate inside the base (3). The base (3) is located at the bottom of the circuit board body (1), and the clamping ring (6) is located at the top of the circuit board body (1).

3. The multilayer high-density double-sided PCB circuit board according to claim 1, characterized in that: A rotating arm (10) is fixedly installed on one side of the eccentric roller (8), and the rotating arm (10) is rotatably engaged with the rotating groove (7).

4. The multilayer high-density double-sided PCB circuit board according to claim 1, characterized in that: The bottom of the clamping ring (6) is glued with a rubber pad (11), and the two sides of the clamping ring (6) are integrally formed and set on two sets of fixing seats (12).

5. A multilayer high-density double-sided PCB circuit board according to claim 4, characterized in that: The top of the fixed base (12) is provided with a snap-fit ​​groove (13), which snaps into the rotating arm (10).

6. A multilayer high-density double-sided PCB circuit board according to claim 5, characterized in that: The bottom sides of the rotating arm (10) are integrally formed with snap-fit ​​blocks (14), which snap-fit ​​blocks (14) with snap-fit ​​grooves (13).

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