High-precision multilayer PCB circuit board

Abstract

The utility model provides a high-precision multilayer PCB circuit board, which comprises two splicing vertical strips and two splicing horizontal strips, the two splicing vertical strips and the two splicing horizontal strips are combined to form a protective frame, and the left side and the right side of the upper end of each splicing horizontal strip are provided with insertion rods in an embedded manner. According to the high-precision multi-layer PCB, the splicing vertical strips, the splicing transverse strips, the base plates, the insertion rods and other structures are arranged, the splicing vertical strips and the splicing transverse strips are combined into a protection frame, a stable external frame is provided for the circuit board and the protection plate, the assembling process is simple and convenient through mortise and tenon connection, connection is firm, external pressure and impact can be effectively resisted, and the reliability of the PCB is improved. The base plate located in the splicing transverse strip can support the jack position of the circuit board, it is guaranteed that the circuit board is stable, meanwhile, the phenomenon that when the circuit board is fixed by the insertion rod, the bottom of the jack position is hollow, stress is uneven, and consequently cracking is caused is avoided, and the insertion rod penetrates through the splicing transverse strip, the protection plate and the jack in the circuit board and is connected with the limiting sleeve. And firm limiting of the circuit board and the protection plate is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, and more specifically to a high-precision multi-layer PCB circuit board. Background Art

[0002] High-precision multilayer PCBs are multilayer circuit boards used in electrical products. Multilayer boards utilize more single-sided or double-sided wiring boards. They use one double-sided inner layer and two single-sided outer layers, or two double-sided inner layers and two single-sided outer layers. These boards are alternately joined together using a positioning system and insulating adhesive materials, with conductive patterns interconnected according to design requirements. These become four-layer or six-layer printed circuit boards, also known as multilayer printed circuit boards. Electrical connections are typically made through plated-through holes (PTHs) in the cross-section of the board.

[0003] However, the existing high-precision multi-layer PCB circuit boards have the following problems during installation:

[0004] Existing multilayer circuit boards are mostly installed and fixed using screws or adhesive. Screw installation and removal are cumbersome and difficult to disassemble. During installation, tools such as screwdrivers are required to tighten the screws one by one, which consumes time and effort. Disassembly also requires tools, and there are risks of screw rust and thread stripping, making disassembly difficult. While adhesive installation is relatively simple, the performance of the adhesive can be affected by environmental factors such as temperature and humidity. Over long-term use, the adhesive can age and fail, causing the circuit board to loosen or fall off. Furthermore, once bonded, disassembly is extremely difficult, often damaging the circuit board.

[0005] The utility model can play the role of an installation and fixing method without screws and adhesives during installation, which is not only simple and convenient to operate, but also makes the installation, disassembly and maintenance of the circuit board more convenient. Utility Model Content

[0006] The utility model aims to solve the technical problems raised by the above-mentioned background technology and provide a high-precision multi-layer PCB circuit board.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision multi-layer PCB circuit board, comprising: two spliced vertical bars and two spliced horizontal bars, the two spliced vertical bars and the two spliced horizontal bars are combined into a protective frame, a protective plate is arranged inside the protective frame, a circuit board is arranged below the protective plate, plug rods are embedded and installed on the left and right sides of the upper end of the spliced horizontal bars, the adjacent sides of the spliced vertical bars are connected with spliced horizontal bars by mortise and tenon joints, a slide groove 1 and a slide groove 2 are respectively provided inside the spliced vertical bars and the spliced horizontal bars, and a socket 1 is provided on the left and right sides of the upper end of the spliced horizontal bar.

[0008] A further preferred solution is that convex strips are fixedly mounted on the slide grooves in the middle and bottom parts of the spliced vertical strips, and the convex strips are slidably connected to the circuit board.

[0009] A further preferred solution is that slots 1 are provided on adjacent surfaces of the splicing vertical bars and the splicing horizontal bars at equal distances, and plug-in blocks 1 are fixedly installed between the slots 1 at equal distances.

[0010] A further preferred solution: pads are fixedly installed on both sides of the left and right sides of the second slide in the middle and bottom part of the spliced horizontal bar, and a socket one is provided in the pad and the second slide. The socket one provided in the pad and the second slide is on the same longitudinal axis as the socket one provided on both sides of the upper end of the spliced horizontal bar.

[0011] A further preferred solution is that two plug-in blocks are fixedly installed at equal distances on adjacent surfaces of the splicing horizontal bars and the splicing vertical bars, two slots are opened at equal distances between the two plug-in blocks, the two plug-in blocks are adapted to the one slot, and the two slots are adapted to the one plug-in block.

[0012] A further preferred solution is that a second socket is provided at each of the four corners of the upper end of the protective plate. The second socket has the same structure as the first socket and is located on the same longitudinal axis as the first socket.

[0013] A further preferred solution: jack three is provided at each of the four corners of the circuit board, jack three and jack one are on the same longitudinal axis, concave strips are fixedly installed on both the left and right sides of the upper and lower ends of the circuit board, and the concave strips are matched with the convex strips.

[0014] A further preferred solution is that a limiting sleeve is nested at the bottom of the insertion rod, and the insertion rod passes through the insertion hole 1 and is connected to the limiting sleeve.

[0015] Beneficial effects:

[0016] 1. The convex and concave strips provide accurate guidance for the circuit board during installation. After the concave strips on the left and right ends of the circuit board align with the convex strips on the first vertical bar slot, the board slides along the convex strips, allowing the circuit board to be quickly and accurately installed in the designated position, greatly improving installation efficiency and accuracy. Once the circuit board is in place, the convex and concave strips fit together, enhancing the stability of the circuit board within the protective frame and effectively preventing it from shaking or shifting when subjected to external impact or vibration, thereby ensuring the normal operation of the circuit board and improving its reliability and service life.

[0017] 2. By providing the insert block 1, slot 1, insert block 2 and slot 2, when assembling the protective frame, the insert block 2 on the splicing horizontal bar is inserted into the slot 1 on the splicing vertical bar, and at the same time, the insert block 1 on the splicing vertical bar is inserted into the slot 2 on the splicing horizontal bar, so that the splicing vertical bar and the splicing horizontal bar can be tightly connected, which not only increases the overall stability of the protective frame, but also effectively disperses external pressure and impact force, better protecting the internal circuit board and protective board. When the protective frame needs to be disassembled for maintenance or replacement of the internal circuit board, it is only necessary to pull out the insert block from the slot without causing damage to the components of the protective frame;

[0018] 3. In summary, this type of high-precision multi-layer PCB circuit board is provided with structures such as splicing vertical bars and splicing horizontal bars, pads and plug-in rods, and the splicing vertical bars and splicing horizontal bars are combined into a protective frame to provide a stable external frame for the circuit board and the protective plate. The mortise and tenon connection method makes the assembly process simple and the connection is firm, which can effectively resist external pressure and impact. The pad located in the splicing horizontal bar can support the jack position of the circuit board, ensuring the stability of the circuit board while avoiding the circuit board being fixed by the plug-in rod. The bottom of the jack position is hollow and uneven force causes cracking, and the plug-in rod passes through the splicing horizontal bar, the protective plate and the jack on the circuit board, and is connected to the limit sleeve to achieve firm limitation of the circuit board and the protective plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the splicing block structure of the present utility model.

[0021] Figure 3 This is a schematic diagram of the protective plate structure of the present utility model.

[0022] Figure 4 This is a schematic diagram of the circuit board structure of the present utility model.

[0023] Figure 5 This is a schematic diagram of the latch structure of the present utility model.

[0024] Figure 6 This is an enlarged structural diagram of point A of the present invention.

[0025] Figure 7 This is an enlarged structural diagram of point B of the present invention.

[0026] Figure 8 This is an enlarged structural diagram of point C of the present invention.

[0027] Figure 1-8Middle: 1. Splicing vertical bar; 101. Slide groove 1; 102. Raised bar; 103. Slot 1; 104. Insert block 1; 2. Splicing horizontal bar; 201. Slide groove 2; 202. Pad; 203. Socket 1; 204. Insert block 2; 205. Slot 2; 3. Protective plate; 301. Socket 2; 4. Circuit board; 401. Socket 3; 402. Concave bar; 5. Insert rod; 501. Limit sleeve. DETAILED DESCRIPTION

[0028] The following is a combination of the appended examples of the present invention Figures 1-8 , clearly and completely describe the technical solutions in the embodiments of the present utility model.

[0029] See also Figure 1-8In an embodiment of the present invention, a high-precision multi-layer PCB circuit board includes: two splicing vertical bars 1 and two splicing horizontal bars 2, the two splicing vertical bars 1 and the two splicing horizontal bars 2 are combined into a protective frame, a protective plate 3 is arranged inside the protective frame, a circuit board 4 is arranged below the protective plate 3, and a plug rod 5 is embedded and installed on both sides of the upper end of the splicing horizontal bar 2. The adjacent sides of the splicing vertical bars 1 are connected with the splicing horizontal bar 2 by mortise and tenon joints, and the splicing vertical bars 1 and the splicing horizontal bar 2 are respectively provided with a slide groove 101 and a slide groove 201, and a socket 1 203 is provided on both sides of the upper end of the splicing horizontal bar 2. The slide groove 2 201 in the middle and bottom of the splicing horizontal bar 2 is fixedly installed with a pad 202 on both sides, and a socket 1 is provided in the pad 202 and the slide groove 2 201. 203, the socket 1 203 provided in the pad 202 and the slide 2 201 is on the same longitudinal axis as the socket 1 203 provided on the left and right sides of the upper end of the splicing horizontal bar 2, and the four corners of the upper end of the protective plate 3 are provided with a socket 201, the socket 2 301 is consistent with the socket 1 203 in structure, and is on the same longitudinal axis as the socket 1 203, the four corners of the circuit board 4 are provided with a socket 3 401, the socket 3 401 is on the same longitudinal axis as the socket 1 203, and a limit sleeve 501 is nested at the bottom of the plug rod 5, the plug rod 5 passes through the socket 1 203 and is connected with the limit sleeve 501. When using the protective frame to protect the circuit board 4, first slide the circuit board 4 with the splicing vertical bar 1 on one side, and pass the circuit board 4 on one side through The slide groove 101 slides into the interior of the splicing vertical bar 1, and then the adjacent splicing horizontal bar 2 is connected to the splicing vertical bar through mortise and tenon joints to form an L shape. At this time, the circuit board 4 is moved toward the splicing horizontal bar 2, so that the circuit board 4 is stuck in the slide groove 201 in the splicing horizontal bar 2, and is located at the upper end of the pad 202, so that the pad 202 supports the circuit board 4, so that the circuit board 4 remains stable in the L-shaped protective frame, and the socket three 401 is aligned with the socket one 203, and then the remaining circuit boards 4 and protective plates 3 are installed in the same way. Finally, the rod 5 is inserted downward, and the rod 5 passes through the left and right sides of the upper end of the splicing horizontal bar 2 and the internal slide groove 201 and the socket one 203 on the pad 202, and the four corners of the upper end of the protective plate 3. The second socket 301 and the third socket 401 at the four corners of the circuit board 4 are finally connected with the limiting sleeve 501 at the bottom to limit the circuit board 4 and the protective plate 3 so that they are fixed in the splicing horizontal bar 2 to ensure a stable position. Finally, the splicing vertical bar 1 and the splicing horizontal bar 2 on the other side are sequentially aligned with the circuit board 4 and the protective plate 3 in the same manner to form a complete protective frame to fix and limit the internal circuit board 4 and the protective plate 3. It should be noted that the protective plate 3 should be installed last and located above all circuit boards 4 to protect the circuit board 4 and prevent external objects from damaging the circuit board. If more circuit boards 4 need to be installed, more slide grooves can be opened in the splicing vertical bar 1 and the splicing horizontal bar 2.

[0030] In the embodiment of the present utility model, convex strips 102 are fixedly installed on the slide groove 101 in the middle and bottom parts of the splicing vertical bar 1, and the convex strips 102 are slidably connected to the circuit board 4. Concave strips 402 are fixedly installed on the upper and lower ends and left and right sides of the circuit board 4, and the concave strips 402 are matched with the convex strips 102. When the circuit board 4 is installed on the splicing vertical bar 1, first align the left and right ends of the circuit board 4 with the slide groove 101, and align the concave strips 402 with the convex strips 102, and then slide the circuit board 4 along the direction of the convex strips 102, so that the circuit board 4 can be quickly and accurately installed to the specified position, and the cooperation between the convex strips 102 and the concave strips 402 can enhance the stability of the circuit board 4 in the protective frame, and the mutual engagement of the convex strips 102 and the concave strips 402 can prevent the circuit board 4 from shaking or displacement when subjected to external impact or vibration, thereby ensuring the normal operation of the circuit board 4.

[0031] In the embodiment of the present invention, a slot 103 is provided on the adjacent surfaces of the splicing vertical bar 1 and the splicing horizontal bar 2 at equal distances, and an insert block 104 is fixedly installed at equal distances between the slots 103. An insert block 204 is fixedly installed on the adjacent surfaces of the splicing horizontal bar 2 and the splicing vertical bar 1 at equal distances, and a slot 205 is provided between the insert block 204 at equal distances. The insert block 204 and the slot 103 are adapted to each other, and the slot 205 and the insert block 104 are adapted to each other. When assembling the protective frame, the adjacent splicing vertical bars 1 and the splicing horizontal bars 2 are connected, and the insert block 2 204 on the splicing horizontal bar 2 is inserted into the slot 103 on the splicing vertical bar, and the insert block 104 on the splicing vertical bar 1 is connected at the same time. Insert the second slot 205 on the splicing horizontal bar 2 to achieve a tight connection between the splicing vertical bar 1 and the splicing horizontal bar 2 to form an L-shaped semi-protective frame. Then, splice another splicing horizontal bar 2 and the splicing vertical bar 1 in the same way. Finally, splice the two L-shaped semi-protective frames together to complete the assembly of the protective frame. When the protective frame is subjected to external pressure or impact, the interaction between the plug and the slot can disperse the stress and prevent the splicing from loosening or deformation, thereby better protecting the internal protective plate 3 and circuit board 4. When the protective frame needs to be disassembled, just pull the plug out of the slot without damaging the components of the protective frame, making it easy to repair or replace the internal circuit board 4.

[0032] Working principle: When installing the circuit board, first use the mortise and tenon connection method, and use the mutually adapted plug-in block 104, slot 103 and plug-in block 204, slot 205 provided on the adjacent surfaces of the splicing vertical bar 1 and the splicing horizontal bar 2, insert the plug-in block 204 on the splicing horizontal bar 2 into the slot 103 on the splicing vertical bar 1, and at the same time insert the plug-in block 104 on the splicing vertical bar 1 into the slot 205 on the splicing horizontal bar 2 to achieve a tight connection to form an L-shaped semi-protective frame, then align the circuit board 4 with the slide groove 101 and the concave strip 402 with the convex strip 102, so that the circuit board 4 slides into the slide groove 101 along the convex strip 102, so that the circuit board 4 is slidably connected to the splicing vertical bar 1 on one side, so that the circuit board 4 slides along the splicing vertical bar 1, and the front end of the circuit board 4 is inserted into the slide groove The second 201 is inside and fits with the upper end of the pad 202 to ensure that the socket three 401 of the circuit board 4 is aligned with the socket one 203 on the splicing horizontal bar 2, and the pad 202 can support the punching position of the circuit board 4 to avoid damage to the circuit board 4 due to the hollow bottom of the socket three 401 during fixation. Then the remaining circuit boards 4 and protective plates 3 are installed in the same way, and the protective plate 3 must be installed above all circuit boards 4 for protection. Finally, the insertion rod 5 is used to pass through the corresponding sockets of the splicing horizontal bar 2, the protective plate 3 and the circuit board 4 in turn and connect with the limit sleeve 501 to fix the circuit board 4 and the protective plate 3. Finally, the splicing vertical bar 1 and the splicing horizontal bar 2 on the other side are installed in the same way to form a complete protective frame to fix and limit the internal circuit boards 4 and protective plates 3.

Claims

1. A high-precision multi-layer PCB circuit board, comprising: Two spliced vertical bars (1) and two spliced horizontal bars (2), the two spliced vertical bars (1) and the two spliced horizontal bars (2) are combined into a protective frame, a protective plate (3) is arranged inside the protective frame, a circuit board (4) is arranged below the protective plate (3), and plug rods (5) are embedded and installed on the left and right sides of the upper end of the spliced horizontal bar (2), characterized in that: the adjacent sides of the spliced vertical bars (1) are connected to the spliced horizontal bar (2) by mortise and tenon joints, the spliced vertical bars (1) and the spliced horizontal bar (2) are respectively provided with a first slide groove (101) and a second slide groove (201), and the left and right sides of the upper end of the spliced horizontal bar (2) are provided with a first socket (203).

2. A high-precision multi-layer PCB circuit board according to claim 1, characterized in that: A convex strip (102) is fixedly mounted on the slide groove (101) in the middle and bottom of the splicing vertical strip (1), and the convex strip (102) is slidably connected to the circuit board (4).

3. The high-precision multi-layer PCB circuit board according to claim 2, characterized in that: Slots (103) are provided at equal distances on adjacent surfaces of the splicing vertical strips (1) and the splicing horizontal strips (2), and plug blocks (104) are fixedly installed at equal distances between the slots (103).

4. The high-precision multi-layer PCB circuit board according to claim 3, characterized in that: Pads (202) are fixedly installed on both left and right sides of the second chute (201) in the middle and bottom of the splicing horizontal bar (2), and a first plug hole (203) is provided in both the pad (202) and the second chute (201). The first plug hole (203) provided in both the pad (202) and the second chute (201) is located on the same longitudinal axis as the first plug hole (203) provided on both left and right sides of the upper end of the splicing horizontal bar (2).

5. The high-precision multi-layer PCB circuit board according to claim 4, characterized in that: Insertion blocks (204) are fixedly installed at equal distances on the adjacent surfaces of the splicing horizontal bar (2) and the splicing vertical bar (1), and slots (205) are opened at equal distances between the insertion blocks (204). The insertion blocks (204) and the slots (103) are adapted to each other, and the slots (205) and the insertion blocks (104) are adapted to each other.

6. The high-precision multi-layer PCB circuit board according to claim 1, characterized in that: The four corners of the upper end of the protection plate (3) are each provided with a second insertion hole (301), and the second insertion hole (301) is consistent in structure with the first insertion hole (203) and is located on the same longitudinal axis as the first insertion hole (203).

7. The high-precision multi-layer PCB circuit board according to claim 2, characterized in that: The circuit board (4) is provided with a third jack (401) at each of its four corners. The third jack (401) and the first jack (203) are located on the same longitudinal axis. Concave strips (402) are fixedly mounted on both the upper and lower ends and the left and right sides of the circuit board (4). The concave strips (402) are matched with the convex strips (102).

8. The high-precision multi-layer PCB circuit board according to claim 1, characterized in that: A limiting sleeve (501) is nested at the bottom of the insertion rod (5), and the insertion rod (5) passes through the first insertion hole (203) and is connected to the limiting sleeve (501).

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