A tear-resistant and surface wrinkle-avoiding circuit board and its processing technology

Abstract

The present invention discloses a circuit board that is tear-resistant and avoids surface wrinkles, and a processing technology thereof, which relates to the technical field of circuit boards, specifically a main board and a connecting card board, wherein the four corners of the main board are provided with mounting holes, and the four corners of the main board are provided with auxiliary components for protecting the circuit board, and the left and right sides of the main board are both provided with side racks, and the inside of the side racks is provided with adjustment components for avoiding the tearing of the circuit board, and the adjustment components include placement grooves and rubber blocks. This circuit board that is tear-resistant and avoids surface wrinkles, and its processing technology, adopts two cleaning processes during processing of the entire circuit board, so that the surface of the circuit board is kept clean, thereby effectively avoiding wrinkles on the surface of the circuit board when laminating the protective layer (adhesive layer and substrate body layer), and can also use visual inspection equipment to visually inspect the pressed circuit board after lamination, so as to facilitate the removal of wrinkled circuit boards.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit boards, and in particular to a circuit board that is tear-resistant and avoids surface wrinkles, and a processing technology thereof. Background Art

[0002] Circuit boards are broadly categorized by the number of layers: single-sided, double-sided, and multi-layer. First, single-sided boards, in their most basic form, have components concentrated on one side and wiring on the other. Because wiring only appears on one side, this type of PCB is called a single-sided board. This makes it difficult to clean the surface residue left by etching during production.

[0003] Existing circuit boards are generally stored inside a shell, but the existing shell is generally thin and will be deformed by external forces, causing the force to act on the circuit board and cause it to tear. At the same time, installation requires the use of holes and bolts for positioning, which brings inconvenience to the installation surface where bolts cannot be used. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a circuit board that is tear-resistant and avoids surface wrinkles, and a processing technology thereof, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a circuit board that is tear-resistant and avoids surface wrinkles, comprising a main board and a connecting card plate, wherein the four internal corners of the main board are provided with mounting holes, and the four external corners of the main board are provided with auxiliary components for protecting the circuit board, side frames are installed on the left and right sides of the main board, and an adjustment component for preventing the circuit board from tearing is provided inside the side frame, the adjustment component comprises a placement groove and a rubber block, and the outer surface of the placement groove is provided with a rubber block, a stabilizing rod is installed inside the placement groove, and a built-in groove is provided inside the stabilizing rod, and an auxiliary rod is installed on the internal thread of the built-in groove, side covers are provided on the two side surfaces of the lower mountain of the main board, and an airbag cavity is installed on the bottom surface of the side cover, and the connecting card plate is provided at the bottom of the airbag cavity.

[0006] Furthermore, the auxiliary component includes a protective corner cover, a reinforcement layer and a connecting cavity, and the outer surface of the protective corner cover is provided with a reinforcement layer, and a connecting cavity is installed at one end of the protective corner cover.

[0007] Furthermore, the protective corner cover is a fan-shaped structure, and the protective corner cover fits tightly with the reinforcement layer.

[0008] Furthermore, two groups of protective corner covers are provided, and four protective corner covers are provided, and the two protective corner covers are connected to each other through a connecting cavity.

[0009] Furthermore, the placement grooves and the rubber blocks are distributed in a one-to-one correspondence, and the rubber blocks are rectangular in shape.

[0010] Furthermore, the outer surface of the protective corner cover is provided with a threaded pipe groove, and the internal thread of the threaded pipe groove is installed with a fastening cover, and the protective corner cover and the threaded pipe groove are an integrated structure.

[0011] Furthermore, the connecting card is engaged and connected with the bottom of the side cover, and two groups of side covers are provided.

[0012] Furthermore, the outer diameter of the auxiliary rod is smaller than the inner diameter of the stabilizing rod, and the interior of the auxiliary rod is a hollow structure.

[0013] Furthermore, a hole cavity is provided in an annular shape inside the stabilizing rod, and a solid cavity is installed on the outer surface of the hole cavity, and the solid cavity and the hole cavity are distributed in an alternating manner.

[0014] Furthermore, the processing technology includes the following steps:

[0015] Step 1: First, prepare the circuit board substrate, take it out and clean it, then use laser etching equipment to etch the surface of the cleaned circuit board to form the circuit pattern;

[0016] Step 2: After the etching process, the PCB substrate is cleaned again using ultrasonic cleaning. After cleaning, a protective layer is applied to the PCB substrate and a high-temperature pressing machine is used for fast pressing. After pressing, the appearance is inspected using visual inspection equipment.

[0017] Step 3: After the initial processing, the base material is welded to the two sides of the mainboard using a welding design. At the same time, a placement slot is drilled in the side frame using the design of a hole punching machine. The placement slot design facilitates the placement of the stabilizing rod, and there are three groups of placement slots, which facilitate the user to adjust the height of the stabilizing rod according to the height of the parts welded on the surface of the mainboard. The stabilizing rod is used to protect the mainboard from the outside to prevent the stabilizing rod from being torn by external force. At the same time, the stabilizing rod can be used to limit the mainboard without using the mounting holes.

[0018] Step 4: Next, the user manually inserts the bottom of the side cover into the slot inside the connecting card plate. The side cover protrudes above the height of the main board, so that when the main board is subjected to force from above or below, the force acts on the side cover first. The side cover moves downward under the force, and the airbag cavity on the bottom surface of the side cover expands due to the continuous downward movement of the airbag cavity, which makes it easier for the user to judge the magnitude of the force on the main board. At the same time, the design of the airbag cavity and the side cover can be used to buffer the external force.

[0019] Step 5. Finally, the user puts the protective corner covers on the four corners of the motherboard, and then uses the design of the threaded tube groove to blow an appropriate amount of gas into the protective corner covers. After the gas blowing is completed, the threaded tube groove is closed by turning the fastening cover clockwise. In this way, the protective corner covers and the connecting cavity will be protected from the outer surface of the motherboard, which can maintain the distance between the two circuit boards when the motherboards are stacked, and can also prevent the four corners of the motherboard from being torn by force during transportation.

[0020] The present invention provides a circuit board that is tear-resistant and avoids surface wrinkles, and a processing technology thereof, which has the following beneficial effects:

[0021] The entire circuit board is processed using two cleaning processes to keep the surface of the circuit board clean, thereby effectively avoiding wrinkles on the surface of the circuit board when the protective layer (adhesive layer and substrate body layer) is attached, and protection can be provided from the four corners and the top of the circuit board, avoiding the problem of external force acting on the main board causing the main board to be torn by force. At the same time, the distance between the two circuit boards when the circuit boards are stacked can be controlled by the design of auxiliary components during transportation of the circuit boards, reducing the problem of damage to the four corners of the circuit boards during transportation. In addition, the design of the stabilizing rod and the auxiliary rod can be used to limit the installation of the circuit board without using mounting holes and bolts while protecting the circuit board, reducing the installation limitations of the circuit board.

[0022] 1. A tear-resistant and wrinkle-free circuit board and its processing technology. The entire circuit board adopts two cleaning processes during processing to keep the circuit board surface clean, thereby effectively preventing wrinkles on the circuit board surface during the lamination of the protective layer (adhesive layer and substrate body layer). After the lamination is completed, the pressed circuit board can be visually inspected using visual inspection equipment to facilitate the removal of wrinkled circuit boards.

[0023] 2. A tear-resistant and wrinkle-free circuit board and its processing technology. After processing, the substrate is welded to the side frames on both sides of the mainboard using a welding design. At the same time, placement slots are drilled in the side frames using a drilling machine design. The placement slots are designed to facilitate the placement of stabilizing rods. Three groups of placement slots are provided, allowing users to adaptively adjust the height of the stabilizing rods according to the height of parts welded on the mainboard surface. The stabilizing rods are used to protect the mainboard from the outside. When the stabilizing rods are subjected to force, the rubber blocks provided on the outer surface of the placement slots can be used to cushion the force, further improving the protection of the mainboard and preventing the stabilizing rods from being torn due to external forces.

[0024] 3. This tear-resistant and wrinkle-free circuit board and its processing technology can be used on mounting surfaces where bolts are inconvenient to use. Depending on the size of the mounting area, the user can rotate the auxiliary rod inside the built-in slot clockwise to move the auxiliary rod out of the built-in slot. The continuous movement of the auxiliary rod allows the ends of the auxiliary rod to be locked in place on the mounting surfaces on both sides where the positioning is required, effectively reducing installation limitations.

[0025] 4. A tear-resistant and wrinkle-free circuit board and its processing technology. The side shield protrudes above the mainboard, so that when forces are applied to the mainboard from above or below, they act first on the side shield. The side shield moves downward under the force, causing the airbag cavity on the bottom surface of the side shield to expand as the airbag cavity continues to move downward. This makes it easier for users to judge the magnitude of the force applied to the mainboard. At the same time, the design of the airbag cavity and the side shield can buffer external forces.

[0026] 5. A tear-resistant and surface wrinkle-avoiding circuit board and its processing technology utilize the design of a threaded tube groove to blow an appropriate amount of gas into the protective corner cover. After the gas blowing is completed, the threaded tube groove is closed by rotating the fastening cover clockwise, so that the protective corner cover and the connecting cavity are protected from the outer surface of the main board, and the distance between the two circuit boards can be maintained when the main boards are stacked, and the four corners of the main board can be prevented from being torn by force during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of a top view of a circuit board that is tear-resistant and avoids surface wrinkles according to the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of a tear-resistant and surface wrinkle-avoiding circuit board side rack according to the present invention;

[0029] Figure 3 A circuit board that is tear-resistant and avoids surface wrinkles Figure 1 A in the middle is an enlarged structural diagram;

[0030] Figure 4 This is a schematic diagram of a connection structure between a circuit board mainboard and an edge cover that is tear-resistant and avoids surface wrinkles according to the present invention;

[0031] Figure 5 This is a schematic diagram of the cross-sectional structure of a circuit board stabilizing rod that is tear-resistant and avoids surface wrinkles according to the present invention.

[0032] In the figure: 1. Main board; 2. Mounting hole; 3. Auxiliary component; 301. Protective corner cover; 302. Reinforcement layer; 303. Connecting cavity; 4. Side rack; 5. Stabilizing rod; 6. Adjustment component; 601. Placement slot; 602. Rubber block; 7. Threaded pipe groove; 8. Fastening cover; 9. Side cover; 10. Airbag cavity; 11. Hole cavity; 12. Solid cavity; 13. Built-in groove; 14. Auxiliary rod; 15. Connecting card. DETAILED DESCRIPTION

[0033] See also Figures 1 to 5 The present invention provides a technical solution: a circuit board that is tear-resistant and avoids surface wrinkles, comprising a mainboard 1, mounting holes 2, auxiliary components 3, protective corner covers 301, a reinforcement layer 302, a connecting cavity 303, a side frame 4, a stabilizing rod 5, an adjustment component 6, a placement groove 601, a rubber block 602, a threaded pipe groove 7, a fastening cover 8, a side cover 9, an airbag cavity 10, a hole cavity 11, a solid cavity 12, a built-in groove 13, an auxiliary rod 14 and a connecting card 15. The mainboard 1 has mounting holes 2 at its four inner corners, and auxiliary components 3 for protecting the circuit board are provided at its four outer corners. Side frames 4 are installed on both sides of the mainboard 1, and the side An adjustment assembly 6 for preventing the circuit board from tearing is provided inside the frame 4. The adjustment assembly 6 includes a placement groove 601 and a rubber block 602. The rubber block 602 is provided on the outer surface of the placement groove 601. The placement grooves 601 and the rubber blocks 602 are distributed in a one-to-one correspondence, and the rubber blocks 602 are rectangular in shape. A stabilizing rod 5 is installed inside the placement groove 601, and a built-in groove 13 is opened inside the stabilizing rod 5. An auxiliary rod 14 is installed on the internal thread of the built-in groove 13. Side covers 9 are provided on both sides of the lower surface of the main board 1, and an airbag cavity 10 is installed on the bottom surface of the side cover 9. A connecting card 15 is provided at the bottom of the airbag cavity 10.

[0034] The specific operation is as follows: the entire circuit board adopts two cleaning processes during processing to keep the surface of the circuit board clean, so that the adhesive layer of the protective layer and the substrate body layer can be bonded to effectively avoid wrinkles on the surface of the circuit board, and the visual inspection equipment can be used to visually inspect the pressed circuit board after the pressing is completed, so as to facilitate the removal of wrinkled circuit boards. After the processing is completed, the substrate is welded to the side frames 4 on both sides of the main board 1 using the welding design, and at the same time, a placement groove 601 is drilled in the side frame 4 using the design of the hole punching machine. The design of the placement groove 601 facilitates the placement of the stabilizing rod 5, and the placement groove 601 is provided with three groups, which is convenient for the user to adaptively adjust the height of the stabilizing rod 5 according to the height of the parts welded on the surface of the main board 1. The stabilizing rod 5 is used to protect the main board 1 from the outside. When the stabilizing rod 5 is subjected to force, the rubber block 602 provided on the outer surface of the placement groove 601 can be used for buffering, thereby further improving the protection effect on the main board 1 and avoiding the stabilizing rod 5 from being torn by force under the action of external force.

[0035] like Figure 1 and Figure 3 As shown, the auxiliary component 3 includes a protective corner cover 301, a reinforcement layer 302 and a connecting cavity 303, and the outer surface of the protective corner cover 301 is provided with a reinforcement layer 302, and the connecting cavity 303 is installed at one end of the protective corner cover 301. The protective corner cover 301 has a fan-shaped structure and is tightly fitted with the reinforcement layer 302. There are two groups of protective corner covers 301, and there are four protective corner covers 301. The two protective corner covers 301 are connected to each other through the connecting cavity 303. The outer surface of the protective corner cover 301 is provided with a threaded pipe groove 7, and the internal thread of the threaded pipe groove 7 is threadedly installed with a fastening cover 8, and the protective corner cover 301 and the threaded pipe groove 7 are an integrated structure.

[0036] The threaded tube groove 7 is designed to blow a proper amount of gas into the protective corner cover 301. After the gas blowing is completed, the threaded tube groove 7 is closed by rotating the fastening cover 8 clockwise, so that the protective corner cover 301 and the connecting cavity 303 will be protected from the outer surface of the main board 1, and the distance between the two circuit boards can be maintained when the main boards 1 are stacked. At the same time, it can also prevent the four corners of the main board 1 from being torn by force during transportation.

[0037] like Figure 1 and Figure 4 As shown, the connecting card plate 15 is engaged with the bottom of the side cover 9, and the side cover 9 is provided with two groups;

[0038] The side cover 9 protrudes above the height of the main board 1, so that when the main board 1 is subjected to force from above and below, the force will first act on the side cover 9. The side cover 9 will move downward under the force, and the airbag cavity 10 on the bottom surface of the side cover 9 will expand due to the continuous downward movement of the airbag cavity 10, which makes it easy for users to judge the size of the force applied to the main board 1. At the same time, the design of the airbag cavity 10 and the side cover 9 can be used to buffer the external force.

[0039] like Figure 1 and Figure 5 As shown, the outer diameter of the auxiliary rod 14 is smaller than the inner diameter of the stabilizing rod 5, and the interior of the auxiliary rod 14 is a hollow structure. The inner ring of the stabilizing rod 5 is provided with a cavity 11, and the outer surface of the cavity 11 is provided with a solid cavity 12, and the solid cavity 12 and the cavity 11 are staggered.

[0040] When it is inconvenient to use bolts to limit the installation surface, the user can, according to the area of ​​the installation area, rotate the auxiliary rod 14 inside the built-in groove 13 clockwise to move the auxiliary rod 14 out of the built-in groove 13. Through the continuous movement of the auxiliary rod 14, the end of the auxiliary rod 14 can be limited and engaged on the installation surfaces on both sides that need to be limited, effectively reducing the installation limitations. At the same time, the design of the solid cavity 12 and the hole cavity 11 can improve the firmness of the stabilizing rod 5 while reducing the weight of the stabilizing rod 5.

[0041] The processing technology includes the following steps,

[0042] Step 1: First, prepare the circuit board substrate, take it out and clean it, then use laser etching equipment to etch the surface of the cleaned circuit board to form the circuit pattern;

[0043] Step 2: After the etching process, the PCB substrate is cleaned again using ultrasonic cleaning. After cleaning, a protective layer is applied to the PCB substrate and a high-temperature pressing machine is used for fast pressing. After pressing, the appearance is inspected using visual inspection equipment.

[0044] Step 3: After the initial processing, the base material is welded to the two sides of the main board 1 by using a welding design. At the same time, a placement groove 601 is drilled in the side frame 4 by using the design of a hole punching machine. The design of the placement groove 601 facilitates the placement of the stabilizing rod 5. There are three groups of placement grooves 601, which are convenient for the user to adjust the height of the stabilizing rod 5 according to the height of the parts welded on the surface of the main board 1. The stabilizing rod 5 is used to protect the main board 1 from the outside to prevent the stabilizing rod 5 from being torn by external force. At the same time, the stabilizing rod 5 can be used to limit the main board 1 without using the mounting hole 2.

[0045] Step 4: Next, the user manually inserts the bottom of the side cover 9 shallowly into the groove provided inside the connecting card plate 15. The side cover 9 protrudes above the height of the main board 1, so that when the main board 1 is subjected to forces from above or below, the force acts first on the side cover 9. The side cover 9 moves downward under the force, and the airbag cavity 10 on the bottom surface of the side cover 9 expands due to the continuous downward movement of the airbag cavity 10, which makes it easier for the user to judge the magnitude of the force applied to the main board 1. At the same time, the design of the airbag cavity 10 and the side cover 9 can be used to buffer the external force.

[0046] Step five, finally the user puts the protective corner cover 301 on the four corners of the main board 1, and then uses the design of the threaded tube groove 7 to blow an appropriate amount of gas into the protective corner cover 301. After the gas blowing is completed, the threaded tube groove 7 is closed by rotating the fastening cover 8 clockwise, so that the protective corner cover 301 and the connecting cavity 303 will be protected from the outer surface of the main board 1, and can maintain the distance between the two circuit boards when the main board 1 is stacked, and can also prevent the four corners of the main board 1 from being torn by force during transportation.

[0047] In summary, the tear-resistant and wrinkle-free circuit board and its processing technology, when used, first prepare the circuit board substrate, take it out and clean it, then use laser etching equipment to etch the surface of the circuit board after cleaning to form a circuit pattern; then clean the circuit board substrate again after etching, use ultrasonic cleaning during cleaning, after cleaning, stick a protective layer on the top of the circuit board substrate and use fast pressing, that is, high-temperature pressing with a press machine, after pressing, use visual inspection equipment to inspect the appearance; then the substrate after the initial processing is completed is placed on the side by welding design The frame 4 is welded to both sides of the main board 1, and a placement slot 601 is drilled in the side frame 4 by using the design of a hole punching machine. The placement slot 601 is designed to facilitate the placement of the stabilizing rod 5, and there are three groups of placement slots 601, which are convenient for the user to adjust the height of the stabilizing rod 5 according to the height of the parts welded on the surface of the main board 1. The stabilizing rod 5 is used to protect the main board 1 from the outside. When the stabilizing rod 5 is subjected to force, the rubber block 602 provided on the outer surface of the placement slot 601 can be used for buffering, thereby further improving the protection effect of the main board 1 and avoiding the stabilizing rod 5 from being torn by force under the action of external force. At the same time, it can be used when it is inconvenient to use bolt limiters. When installing on the surface of the main board 1, the user can rotate the auxiliary rod 14 inside the built-in groove 13 clockwise according to the area of ​​the installation area, so that the auxiliary rod 14 can be moved out of the built-in groove 13. Through the continuous movement of the auxiliary rod 14, the end of the auxiliary rod 14 can be limited and engaged with the installation surface on both sides where the position is required to be limited, effectively reducing the installation limitation; secondly, the user manually inserts the bottom of the side cover 9 shallowly into the groove opened inside the connecting card 15, and the side cover 9 protrudes from the height of the main board 1, so that when the main board 1 is subjected to force from above and below, it will first act on the side cover 9, and the side cover 9 will move downward under the force, so that the airbag cavity 10 on the bottom surface of the side cover 9 will be due to the airbag cavity 10 continuously moves downward to expand, making it easier for the user to judge the magnitude of the force applied to the mainboard 1, and at the same time, the design of the airbag cavity 10 and the side cover 9 can be used to buffer the external force; finally, the user puts the protective corner cover 301 on the four corners of the mainboard 1, and then uses the design of the threaded tube groove 7 to blow a proper amount of gas into the protective corner cover 301. After the gas blowing is completed, the threaded tube groove 7 is closed by rotating the fastening cover 8 clockwise, so that the protective corner cover 301 and the connecting cavity 303 will be protected from the outer surface of the mainboard 1, and can maintain the distance between the two circuit boards when the mainboards 1 are stacked, and can also prevent the four corners of the mainboard 1 from being torn during transportation.

Claims

1. A circuit board that is tear-resistant and avoids surface wrinkles, characterized in that: The invention comprises a main board (1) and a connecting card (15), wherein the main board (1) is provided with mounting holes (2) at four inner corners, and the main board (1) is provided with auxiliary components (3) for protecting the circuit board at four outer corners, and the left and right sides of the main board (1) are both provided with side racks (4), and the inside of the side racks (4) is provided with an adjustment component (6) for preventing the circuit board from being torn, and the adjustment component (6) comprises a placement groove (601) and a rubber block (602), and the outer surface of the placement groove (601) is provided with a rubber block (602), a stabilizing rod (5) is installed inside the placement groove (601), and an internal groove (13) is provided inside the stabilizing rod (5), and an auxiliary rod (14) is installed on the internal thread of the internal groove (13), and side covers (9) are provided on the lower two sides of the main board (1), and the side covers ( 9) is provided with an airbag cavity (10), the connecting card plate (15) is provided at the bottom of the airbag cavity (10), the auxiliary component (3) includes a protective corner cover (301), a reinforcement layer (302) and a connecting cavity (303), and the outer surface of the protective corner cover (301) is provided with a reinforcement layer (302), one end of the protective corner cover (301) is provided with a connecting cavity (303), the outer surface of the protective corner cover (301) is provided with a threaded pipe groove (7), and the inner thread of the threaded pipe groove (7) is provided with a fastening cover (8), and the protective corner cover (301) and the threaded pipe groove (7) are an integrated structure, the inner ring of the stabilizing rod (5) is provided with a hole cavity (11), and the outer surface of the hole cavity (11) is provided with a solid cavity (12), and the solid cavity (12) and the hole cavity (11) are staggered.

2. A tear-resistant and surface wrinkle-avoiding circuit board according to claim 1, characterized in that: The protective corner cover (301) is a fan-shaped structure, and the protective corner cover (301) is tightly fitted to the reinforcement layer (302).

3. A tear-resistant and surface wrinkle-avoiding circuit board according to claim 2, characterized in that: Two groups of protective corner covers (301) are provided, and four protective corner covers (301) are provided, and the two protective corner covers (301) are connected to each other through a connecting cavity (303).

4. The tear-resistant and surface wrinkle-avoiding circuit board according to claim 3, characterized in that: The placement grooves (601) and the rubber blocks (602) are distributed in a one-to-one correspondence, and the rubber blocks (602) are in the shape of a rectangular structure.

5. The tear-resistant and surface wrinkle-avoiding circuit board according to claim 4, characterized in that: The connecting clamping plate (15) is connected to the bottom of the side cover (9) by snapping, and the side cover (9) is provided with two groups.

6. The tear-resistant and surface wrinkle-avoiding circuit board according to claim 5, characterized in that: The outer diameter of the auxiliary rod (14) is smaller than the inner diameter of the stabilizing rod (5), and the interior of the auxiliary rod (14) is a hollow structure.

7. The process for manufacturing a tear-resistant and surface wrinkle-free circuit board according to claim 6, characterized in that: The processing technology includes the following steps, Step 1: First, prepare the circuit board substrate, take it out and clean it, then use laser etching equipment to etch the surface of the cleaned circuit board to form the circuit pattern; Step 2: After the etching process, the PCB substrate is cleaned again using ultrasonic cleaning. After cleaning, a protective layer is applied to the PCB substrate and a high-temperature pressing machine is used for fast pressing. After pressing, the appearance is inspected using visual inspection equipment. Step three, after the initial processing is completed, the base material is welded to the side frames (4) on both sides of the main board (1) by using the welding design, and at the same time, a placement groove (601) is drilled in the side frames (4) by using the design of the hole punching machine. The placement groove (601) is designed to facilitate the placement of the stabilizing rod (5), and there are three groups of placement grooves (601), which are convenient for the user to adjust the height of the stabilizing rod (5) adaptively according to the height of the parts welded on the surface of the main board (1). The stabilizing rod (5) is used to protect the main board (1) from the outside to prevent the stabilizing rod (5) from being torn by force under the action of external force. At the same time, the stabilizing rod (5) can be used to limit the main board (1) without using the mounting hole (2); Step 4: The user manually inserts the bottom of the side cover (9) into the slot provided inside the connecting card plate (15). The side cover (9) protrudes above the height of the main board (1), so that when the main board (1) is subjected to force from above or below, the side cover (9) is first acted upon. The side cover (9) is subjected to force and moves downward, so that the airbag cavity (10) on the bottom surface of the side cover (9) expands due to the continuous downward movement of the airbag cavity (10), making it easier for the user to judge the magnitude of the force applied to the main board (1). At the same time, the design of the airbag cavity (10) and the side cover (9) can be used to buffer the external force. Step five, finally the user puts the protective corner cover (301) on the four corners of the main board (1), and then blows a proper amount of gas into the protective corner cover (301) by using the design of the threaded tube groove (7). After the gas blowing is completed, the threaded tube groove (7) is closed by rotating the fastening cover (8) clockwise, so that the protective corner cover (301) and the connecting cavity (303) are protected from the outer surface of the main board (1), and the distance between the two circuit boards can be maintained when the main boards (1) are stacked and placed, and the four corners of the main board (1) can be prevented from being torn by force during transportation.

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