Easily-drilled multilayer PCB (Printed Circuit Board)

Abstract

The utility model relates to the technical field of PCB (printed circuit board) production, in particular to an easily drilled multilayer PCB, which comprises a core board and substrates laminated on two sides of the core board, guide structures are arranged between the core board and the substrates on two sides, the guide structures are used for guiding a drill bit to move downwards, one of the substrates is a radiating aluminum board, a fixing structure is arranged on the side edge of the substrate, and the fixing structure is used for fixing the drill bit. The fixing structure is used for fixing a heat dissipation piece, positioning icons corresponding to core plate positioning holes are arranged on the surfaces of the base plates on the two sides, the accuracy of positioning and drilling of the drilling equipment is further improved through the positioning icons, a drill bit only needs to penetrate through the base plates on the two sides, and the possibility that the drill bit deflects can be effectively reduced under the guiding effect of the barrel piece in the downward moving process. And a heat dissipation piece is further fixed to the side face of the substrate through a fixing structure, the heat dissipation efficiency of the heat dissipation plate can be improved, and the heat dissipation piece can be disassembled, assembled and maintained after long-time use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of PCB board production, especially to an easy-to-drill multilayer PCB board. BACKGROUND

[0002] Composite PCB, also known as composite base copper-clad plate, is a type of printed circuit board (PCB) that combines the properties of different materials to meet specific application requirements. The manufacturing process of composite PCB involves impregnating reinforcing materials such as wood pulp paper or glass fiber cloth with resin, then coating copper foil on one or both sides, and making it through a hot pressing process.

[0003] By inserting wires in the holes, electrical connections can be established between the internal layers of the PCB. For example, the prior art Chinese patent publication number "CN215871981U" discloses a PCB with anti-burr deformation and easy drilling, which includes a circuit board. The inner cavity of the circuit board is provided with a reinforcing assembly on the upper and lower sides, and a drilling assembly is arranged on the upper and lower sides of the inner cavity of the circuit board. Each reinforcing assembly includes a reinforcing rib, a support plate, and a filler. Four reinforcing ribs are arranged in the inner cavity of the circuit board, a plurality of support plates are arranged in the inner cavity of the reinforcing rib, and two fillers are arranged at the center position of the two reinforcing ribs in the middle. Each drilling assembly includes a drilling block and a glue bag, and the drilling block is arranged at the inner side of the two reinforcing ribs in the middle of each reinforcing assembly. The PCB with anti-burr deformation and easy drilling relates to the technical field of PCB, solves the problem of deformation and burr in the drilling hole of the PCB during drilling, and improves the quality of the PCB.

[0004] In the specific operation, the circuit board is provided with a hole turning block for drilling, but there is no guiding structure in the circuit board during the drilling process, and the drill bit may be inclined during the drilling process, which has poor practicability. Utility model content

[0005] The utility model aims at solving the above-mentioned shortcomings of the prior art, i.e., the circuit board does not have a guiding structure, and the drill bit may be inclined during the drilling process, and provides an easy-to-drill multilayer PCB.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] An easy-to-drill multilayer PCB is designed, which includes a core plate and two side-pressed base plates. A guiding structure is provided between the core plate and the two side base plates. The guiding structure is used to guide the downward movement of the drill bit. One of the base plates is a heat dissipation aluminum plate. A fixing structure is provided on the side edge of the base plate. The fixing structure is used to fix the heat dissipation member.

[0008] Further, the core plate is arranged concentrically with the center point of the two side substrates, a positioning hole is arranged on the end face of the core plate, and a positioning icon corresponding to the positioning hole is arranged on the end face of the two side substrates.

[0009] Further, the guiding structure comprises a cylinder, the cylinder is arranged in the positioning hole, a pair of supporting portions are arranged on the outer edges of the two ends of the cylinder, a gravity groove is arranged on the bottom of the opposite sides of the pair of supporting portions, and the pair of supporting portions are bent relative to the gravity groove.

[0010] Further, the core plate is arranged concentrically with the center point of the two side substrates, a positioning hole is arranged on the end face of the core plate, and a positioning icon corresponding to the positioning hole is arranged on the end face of the two side substrates.

[0011] Further, the fixing structure comprises a supporting column, the pair of supporting columns are arranged on the side face of one of the substrates in a diagonal manner, a tapered portion is arranged on the top of the supporting column, and the middle portion of the tapered portion penetrates the supporting column downward to form a deformation groove.

[0012] Further, the heat dissipation piece is provided with a through hole corresponding to the supporting column, the tapered portion slides and is clamped with the heat dissipation piece through the through hole, and the heat dissipation piece is attached to the substrate.

[0013] The utility model provides a multilayer PCB easy to drill, beneficial effect lies in: the utility model discloses that the positioning icon corresponding to the core plate positioning hole is arranged on the surface of the two side substrates, the positioning icon further improves the accuracy of the drilling equipment positioning drilling, and the core plate end face is provided with the positioning hole, and the drill only needs to penetrate the two side substrates, and the drill can effectively reduce the possibility of deflection under the guidance of the cylinder in the downward movement process, considering the heating condition in the use process of the composite PCB, the heat dissipation piece is further fixed on the side face of the substrate through the fixing structure, which is beneficial to improving the heat dissipation efficiency of the heat dissipation plate, and the heat dissipation piece can be disassembled and maintained after long -term use. ACCURATE DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is the structural schematic diagram of the guiding structure of the utility model;

[0016] Figure 3 It is Figure 2 the enlarged structural schematic diagram of A area of;

[0017] Figure 4 It is the structural schematic diagram of the fixing structure of the utility model;

[0018] Figure 5 It is Figure 4 the enlarged structural schematic diagram of B area.

[0019] In the figure: 1, core plate; 11, positioning hole; 12, positioning groove; 2, base plate; 21, positioning icon; 3, guide structure; 31, cylinder; 32, support part; 33, attractive groove; 4, fixing structure; 41, support column; 42, tapered part; 43, deformation groove; 5, heat dissipation piece; 51, through hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0021] Reference Figures 1-5 A kind of easy-to-drill multilayer PCB, including core plate 1, and the base plate 2 being pressed on both sides thereof, guiding structure 3 is equipped between the core plate 1 and both sides the base plate 2, the guiding structure 3 is used to guide drill bit to move down, one of the base plate 2 is heat dissipation aluminum plate, fixed structure 4 is equipped in the side of this base plate 2, and the fixed structure 4 is used to fix heat dissipation piece 5.

[0022] Further, the core plate 1 and the center point of both sides the base plate 2 are concentrically arranged, positioning hole 11 is arranged on the end face of the core plate 1, and positioning icon 21 corresponding to the positioning hole 11 is arranged on the end face of both sides the base plate 2.

[0023] It is worth mentioning that the drilling position can be determined by the way that drilling equipment detects specific icon through visual sensor, and the positioning icon 21 can preliminarily guide the drilling equipment to drill;

[0024] Further, in the drilling process, the drill bit of the drilling equipment only needs to penetrate the base plate 2 on both sides, reduces the difficulty of drilling, and under the guiding action of the cylinder 31 in the moving-down process, the possibility of drill bit deflection can be effectively reduced.

[0025] Further, the guiding structure 3 includes cylinder 31, the cylinder 31 is arranged in the positioning hole 11, a pair of support parts 32 are arranged on the outer edge of both ends of the cylinder 31, attractive grooves 33 are arranged on the bottom of the opposite sides of the pair of support parts 32, and the pair of support parts 32 are bent relative to the attractive grooves 33.

[0026] More specifically, the outer edge of both sides of the core plate 1 located in the positioning hole 11 is provided with a positioning groove 12, and the support part 32 is clamped in the positioning groove 12.

[0027] In the embodiment, the cylinder 31 is a cylindrical member made of copper material, the cylinder 31 is arranged in the positioning hole 11, and the pair of support portions 32 on both sides are bent relative to each other under the action of the gravity groove 33, the support portions 32 on both sides are clamped in the positioning groove 12, and the cylinder 31 is fixed.

[0028] In general, the fixing structure 4 comprises a support column 41, a pair of the support columns 41 are diagonally distributed on the side of one of the substrates 2, a tapered portion 42 is arranged at the top of the support column 41, and a deformation groove 43 is formed in the support column 41 downwardly through the middle of the tapered portion 42.

[0029] Finally, the heat dissipation member 5 is provided with a through hole 51 corresponding to the support column 41, the tapered portion 42 slides and clamps the heat dissipation member 5 by abutting the through hole 51, and the heat dissipation member 5 is attached to the substrate 2.

[0030] In the embodiment, the support column 41 is preferably made of a material capable of deformation, such as silica gel or plastic, the tapered portion 42 slides and clamps the heat dissipation member 5 by abutting the through hole 51 through the guide slope at the top, and when the tapered portion 42 abuts the heat dissipation member 5, the tapered portion 42 deforms to avoid the through hole 51 through the deformation groove 43, and then restores to clamp the heat dissipation member 5, thereby achieving the fixing effect.

[0031] The heat dissipation member 5 is a heat dissipation fin.

[0032] When working, the cylinder 31 is arranged in the positioning hole 11, the pair of support portions 32 on both sides are bent relative to each other by manual or mechanical equipment under the action of the gravity groove 33, the support portions 32 on both sides are clamped in the positioning groove 12, and the cylinder 31 is fixed.

[0033] The drill bit preliminarily determines the drilling position through the positioning icon 21, and then only needs to pass through the substrates 2 on both sides during the drilling process, thereby reducing the difficulty of drilling, and the guiding effect of the cylinder 31 is further achieved during the downward movement, thereby reducing the possibility of deviation of the drill bit.

[0034] The tapered portion 42 slides and clamps the heat dissipation member 5 by abutting the through hole 51 through the guide slope at the top, and improves the heat dissipation efficiency of the PCB through the heat dissipation member 5.

[0035] The above is only a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A multi-layer PCB board easy to drill, comprising a core board (1) and a base board (2) pressed on both sides of the core board (1), characterized in that: The core plate (1) is provided with a guide structure (3) between the core plate (1) and the two side base plates (2), which is used to guide the drill bit to move downward, one of the base plates (2) is an aluminum heat dissipation plate, and a fixing structure (4) is arranged on the side edge of the base plate (2), which is used to fix a heat dissipation piece (5).

2. The easy-to-drill multilayer PCB board of claim 1, wherein: The core plate (1) is concentrically arranged with the center points of the two side base plates (2), a positioning hole (11) is arranged on the end face of the core plate (1), and the end face of the two side base plates (2) is provided with a positioning icon (21) corresponding to the positioning hole (11).

3. The easy-to-drill multilayer PCB board of claim 2, wherein: The guide structure (3) comprises a cylinder (31), the cylinder (31) is arranged in the positioning hole (11), a pair of support portions (32) are arranged on the outer edges of the two ends of the cylinder (31), a gravity slot (33) is arranged on the bottom of the opposite sides of the pair of support portions (32), and the pair of support portions (32) are bent relative to the gravity slot (33).

4. The easy-to-drill multilayer PCB board of claim 3, wherein: The outer edges of the two side core plates (1) located in the positioning hole (11) are provided with a positioning slot (12), and the support portion (32) is clamped in the positioning slot (12).

5. The easy-to-drill multilayer PCB board of claim 1, wherein: The fixing structure (4) comprises a support column (41), a pair of support columns (41) are diagonally distributed on the side face of one of the base plates (2), a tapered portion (42) is arranged on the top of the support column (41), and the middle portion of the tapered portion (42) penetrates the support column (41) downward to form a deformation slot (43).

6. The easy-to-drill multilayer PCB board of claim 5, wherein: The heat dissipation piece (5) is provided with a through hole (51) corresponding to the support column (41), the tapered portion (42) slides and is clamped with the heat dissipation piece (5) through the through hole (51), and the heat dissipation piece (5) is attached to the base plate (2).

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