Multi-layer circuit board with anti-bending structure

Abstract

The utility model relates to the technical field of multi-layer circuit boards, in particular to a multi-layer circuit board with an anti-bending structure, which comprises a circuit board, and first through holes are arranged at corners of the circuit board. A bottom plate is arranged below the circuit board in parallel, supporting plates are installed on the bottom plate, and the supporting plates are perpendicular to the bottom plate, arranged in an S shape and used for supporting the circuit board. A limiting plate is installed along the edge of the top of the bottom plate, a plurality of limiting seats arranged at intervals are installed on the inner side of the limiting plate, and the limiting seats are elastic rubber blocks and are in clearance fit with the side edge of the circuit board. When the multilayer circuit board with the anti-bending structure is used, the fixed frame and the bottom plate are clamped and fixed on the circuit board, so that the extrusion force of the bolts is concentrated on the fixed frame and the bottom plate, the circuit board is prevented from being acted, the circuit board is wrapped, the supporting strength of the circuit board is improved, and the service life of the circuit board is prolonged. And the bending possibility of the circuit board is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of multi - layer circuit boards, in particular to a multi - layer circuit board with an anti - bending structure. Background Art

[0002] A multi - layer circuit board is a printed circuit board with electrical connections distributed on multiple layers. Its wiring is more complex than that of single - sided or double - sided circuit boards, and it can significantly reduce the size of the circuit board. This circuit board is composed of at least three copper foil layers and two insulating layers stacked together, and connections are formed between layers through the pore electroplating process.

[0003] When installing a multi - layer circuit board, bolts are used for fixation. As the bolts are continuously tightened, the bolts will also exert pressure on the circuit board. Coupled with the relatively brittle material of the circuit board itself, it is very easy for the circuit board to bend and be damaged. Moreover, the circuit board requires multiple bolts distributed at various positions on the circuit board for fixation, resulting in multiple positions of the circuit board being stressed under the pressure of the bolts, making it more likely to bend and other situations, and further making it possible for the wiring, capacitors, etc. on the circuit board to break away from the substrate. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above - mentioned disadvantages in the prior art, and to propose a multi - layer circuit board with an anti - bending structure.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: Design a multi - layer circuit board with an anti - bending structure, including a circuit board, and first through - holes are opened at the corners of the circuit board;

[0006] A bottom plate is arranged in parallel below the circuit board, and a support plate is installed on the bottom plate. The support plate is perpendicular to the bottom plate and is arranged in an "S" shape for supporting the circuit board;

[0007] A limit plate is installed along the top edge of the bottom plate, and a plurality of spaced - apart limit seats are installed inside the limit plate. The limit seats are elastic rubber blocks and are in clearance fit with the side of the circuit board;

[0008] Second through - holes corresponding to the first through - holes are opened on the bottom plate. A fixed frame is arranged above the circuit board, and the fixed frame corresponds to the top of the limit plate. Connecting seats are installed at the inner corners of the fixed frame. A sleeve is vertically installed at the bottom of the connecting seat, and the sleeve corresponds to the second through - hole. A nut is threadedly connected to the bottom of the sleeve, and a third through - hole coaxial with the sleeve is also opened on the connecting seat.

[0009] Preferably, an elastic rubber pad is installed along the bottom of the fixed frame, and the rubber pad corresponds to the edge of the circuit board.

[0010] Preferably, a through groove arranged in an "S" shape is formed in the bottom plate. Among them, the support plate is fixedly arranged along the edge of the through groove, and the support plate penetrates through the bottom plate and extends outside the bottom plate, and the bottom of the support plate is flush with the bottom of the sleeve.

[0011] Preferably, the support plate is a heat conducting plate.

[0012] Preferably, a silicone grease gasket is installed on the top of the support plate.

[0013] Preferably, a plurality of slotted openings are formed in the side surface of the support plate, and the slotted openings are arranged at intervals.

[0014] Preferably, a ventilation opening is formed in the limiting plate, and the ventilation opening corresponds to the limiting seat and penetrates through the limiting seat.

[0015] Preferably, the circuit board includes multiple copper layers, and a separation layer is arranged between adjacent copper layers, and signal line layers are installed on the top of the uppermost copper layer and the bottom of the lowermost copper layer.

[0016] The beneficial effects of the design scheme proposed by the present utility model in the application process are as follows:

[0017] 1. The multi-layer circuit board with an anti-bending structure is clamped and fixed on the circuit board through the fixed frame and the bottom plate. When the circuit board is fixed with bolts, the extrusion force of the bolts is concentrated on the fixed frame and the bottom plate, so as to prevent the circuit board from being affected, and at the same time, the circuit board is wrapped to provide additional stress for the circuit board and reduce the possibility of the circuit board being bent.

[0018] 2. The multi-layer circuit board with an anti-bending structure is supported on the bottom plate by the "S"-shaped support plate to provide a reinforcing plate perpendicular to the bottom plate, thereby preventing the bottom plate from being bent under force and further enhancing the anti-bending ability of the circuit board. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is an exploded view of the present utility model;

[0021] Figure 3 is a top view of the bottom plate of the present utility model;

[0022] Figure 4 is a bottom view of the bottom plate of the present utility model;

[0023] Figure 5 is a structural diagram of the fixed frame of the present utility model.

[0024] In the figure: 1. Circuit board; 2. First through hole; 3. Bottom plate; 4. Limiting plate; 5. Limiting seat; 6. Ventilation opening; 7. Through groove; 8. Support plate; 9. Groove; 10. Second through hole; 11. Fixed frame; 12. Sleeve; 13. Connecting seat; 14. Third through hole; 15. Nut; 16. Rubber pad. Detailed implementation manner

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0026] Refer to Figures 1 - 5 , a multi-layer circuit board with an anti-bending structure, including a circuit board 1. Among them, the circuit board 1 includes multiple copper layers, and a separation layer is provided between adjacent copper layers, and signal line layers are installed on the top of the uppermost copper layer and the bottom of the lowermost copper layer; in the actual use process, the separation layer is composed of a glass fiber layer and epoxy resin.

[0027] As Figure 2 and Figure 3 shown, a bottom plate 3 is arranged in parallel below the circuit board 1, and a support plate 8 is installed on the bottom plate 3. The support plate 8 is perpendicular to the bottom plate 3 and is arranged in an "S" shape for supporting the circuit board 1; among them, a through groove 7 arranged in an "S" shape is opened on the bottom plate 3. Among them, the support plate 8 is fixedly arranged along the edge of the through groove 7, and the support plate 8 penetrates through the bottom plate 3 and extends outside the bottom plate 3, so that when the bottom plate 3 is placed at the bottom of the circuit board 1, air can pass through the through groove 7 to contact the circuit board 1, thereby ensuring the heat dissipation of the circuit board 1 during use.

[0028] Specifically, the support plate 8 is a heat-conducting plate, and a silicone grease gasket is installed on the top of the support plate 8, which can transfer the heat on the circuit board 1 outward through the heat-conducting plate, thereby playing a role in dissipating heat from the circuit board 1, and the setting of the silicone grease gasket can accelerate the transfer rate of the heat of the circuit board 1 to the support plate 8.

[0029] After placing the circuit board 1 on the bottom plate 3, as Figure 2 shown, a limiting plate 4 is installed along the top edge of the bottom plate 3, and a plurality of spaced-apart limiting seats 5 are installed inside the limiting plate 4. The limiting seats 5 are elastic rubber blocks and are in clearance fit with the side of the circuit board 1, so that the limiting plate 4 wraps the circuit board 1, and the circuit board 1 is limited by the limiting seats 5, so that the circuit board 1 is stable on the bottom plate 3;

[0030] First through holes 2 are provided at the corners of the circuit board 1, and second through holes 10 corresponding to the first through holes 2 are provided on the bottom plate 3. A fixed frame 11 is provided above the circuit board 1, and the fixed frame 11 corresponds to the top of the limiting plate 4. After the fixed frame 11 covers the circuit board 1, the fixed frame 11 will be placed on the limiting plate 4, and the limiting plate 4 supports the fixed frame 11. That is, after the fixed frame 11 is subjected to a pressure, the pressure will fall on the limiting plate 4 and the bottom plate 3 along the fixed frame 11 and will not act on the circuit board 1. Connecting seats 13 are installed at the inner corners of the fixed frame 11. A sleeve 12 is vertically installed at the bottom of the connecting seat 13. The sleeve 12 corresponds to the second through hole 10, and the bottom of the sleeve 12 is flush with the bottom of the support plate 8. A nut 15 is threadedly connected to the bottom of the sleeve 12. A third through hole 14 corresponding to the sleeve 12 coaxially is also provided on the connecting seat 13. After the fixed frame 11 is covered on the limiting plate 4, the sleeve 12 will pass through the first through hole 2 and the second through hole 10 and extend out from the bottom of the bottom plate 3. At this time, the nut 15 can be taken and screwed onto the sleeve 12, so as to firmly fix the fixed frame 11 on the limiting plate 4.

[0031] Specifically, in the actual use process, after the nut 15 is tightened on the sleeve 12, a part of the bottom of the sleeve 12 still protrudes. Thus, when the circuit board 1 is installed, the sleeve 12 can be placed at the installation position, and then a bolt can be taken and passed through the sleeve 12 to fix the circuit board 1. As the squeezing force of the bolt during fixation also concentrates on the connecting seat 13, that is, the fixed frame 11, and the fixed frame 11 is in direct contact with the limiting plate 4, the squeezing force of the bolt can be transmitted to the bottom plate 3, so as to prevent the circuit board 1 from being squeezed by the bolt and protect the circuit board 1.

[0032] It should be noted that after the fixed frame 11 is fastened to the limiting plate 4, as Figure 5 shown, an elastic rubber pad 16 is installed along the bottom of the fixed frame 11. The rubber pad 16 corresponds to the edge of the circuit board 1. The fixed frame 11 presses on the top of the circuit board 1, so that the circuit board 1 can be better fixed between the fixed frame 11 and the bottom plate 3. The support plate 8 is in close contact with the bottom of the circuit board 1. Coupled with the "S"-shaped structure of the support plate 8, the stress intensity of the bottom plate 3 is enhanced, so as to improve the anti-bending property of the circuit board 1.

[0033] It should be further noted that, as Figure 3 shown, slots 9 are provided on the side surface of the support plate 8. There are several slots 9 and they are arranged at intervals; ventilation openings 6 are provided on the limiting plate 4. The ventilation openings 6 correspond to the limiting seats 5 and penetrate through the limiting seats 5. Air can enter between the circuit board 1 and the bottom plate 3 from the ventilation openings 6 and flow between the two, so as to better cool the circuit board 1.

[0034] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A multi-layer circuit board with an anti-bending structure, characterized in that: It includes a circuit board (1), and first through holes (2) are provided at the corners of the circuit board (1); A bottom plate (3) is arranged in parallel below the circuit board (1), and a support plate (8) is installed on the bottom plate (3). The support plate (8) is perpendicular to the bottom plate (3) and is arranged in an "S" shape to support the circuit board (1); A limit plate (4) is installed along the top edge of the bottom plate (3), and a plurality of spaced limit seats (5) are installed inside the limit plate (4). The limit seats (5) are elastic rubber blocks and are in clearance fit with the side of the circuit board (1); A second through hole (10) corresponding to the first through hole (2) is provided on the bottom plate (3). A fixed frame (11) is arranged above the circuit board (1). The fixed frame (11) corresponds to the top of the limit plate (4). A connecting seat (13) is installed at the inner corner of the fixed frame (11). A sleeve (12) is vertically installed at the bottom of the connecting seat (13). The sleeve (12) corresponds to the second through hole (10), and a nut (15) is threadedly connected to the bottom of the sleeve (12). A third through hole (14) coaxial with the sleeve (12) is also provided on the connecting seat (13).

2. The multilayer circuit board with an anti-bending structure according to claim 1, wherein: An elastic rubber pad (16) is installed along the bottom of the fixed frame (11), and the rubber pad (16) corresponds to the edge of the circuit board (1).

3. The multilayer circuit board with an anti-bending structure according to claim 1, characterized in that: A through groove (7) arranged in an "S" shape is provided on the bottom plate (3). Among them, the support plate (8) is fixedly arranged along the edge of the through groove (7). The support plate (8) penetrates through the bottom plate (3) and extends outside the bottom plate (3), and the bottom of the support plate (8) is flush with the bottom of the sleeve (12).

4. A multi-layer circuit board with an anti-bending structure according to claim 1, characterized in that: The support plate (8) is a heat-conducting plate.

5. The multilayer circuit board with an anti-bending structure according to claim 1, characterized in that: A silicone grease gasket is installed on the top of the support plate (8).

6. The multilayer circuit board with an anti-bending structure according to claim 1, wherein: A plurality of slots (9) are provided on the side surface of the support plate (8), and the slots (9) are arranged at intervals.

7. A multi-layer circuit board with an anti-bending structure according to claim 1, characterized in that: A ventilation opening (6) is provided on the limit plate (4), and the ventilation opening (6) corresponds to the limit seat (5) and penetrates through the limit seat (5).

8. A multi-layer circuit board with an anti-bending structure according to claim 1, characterized in that: The circuit board (1) includes multiple copper layers, and a separation layer is provided between adjacent copper layers. Signal line layers are installed on the top of the topmost copper layer and the bottom of the bottommost copper layer respectively.

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