Multilayer circuit board structure

Abstract

The utility model relates to the technical field of circuit boards, and discloses a multilayer circuit board structure which comprises a multilayer circuit board body, and the bottom and the top of the multilayer circuit board body are respectively provided with a first protective sleeve and a second protective sleeve. The first protective sleeve and the second protective sleeve wrap the four edges of the bottom and the four edges of the top of the multilayer circuit board body respectively, fixing assemblies are arranged at the four corners of the top of the first protective sleeve, connecting assemblies are arranged at the four corners of the bottom of the second protective sleeve, and the second protective sleeve is connected with the fixing assemblies through the connecting assemblies. The side faces, close to the four corners, of the first protection sleeve are provided with the installation assemblies, and the four edges of the bottom and the four edges of the top of the multilayer circuit board body are wrapped through the first protection sleeve and the second protection sleeve respectively, so that edge warping caused by local stress concentration is avoided; therefore, the multilayer circuit board does not need to bear local stress of screw tightening, so that the risk of damage to the multilayer circuit board is prevented.

Description

Technical Field

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

[0002] A multilayer circuit board is a circuit board made up of multiple conductive layers and insulating layers alternately stacked together. Each conductive layer is connected by vias to form a complex circuit network. Existing multilayer circuit boards have many names such as aluminum substrate, thick copper plate, PCB, and super. Circuit boards make circuits miniaturized and intuitive, and play an important role in the mass production of fixed circuits and the optimization of electrical appliance layout. Most of the existing multilayer circuit boards are used in electrical equipment.

[0003] Most of the existing multi-layer circuit boards are connected to the housing of electrical equipment by screws. Workers will use auxiliary tools to pass the screws through the reserved mounting holes on the multi-layer circuit boards and tighten the screws with the holes opened in the housing of the electrical equipment. However, the screws directly connect the multi-layer circuit board and the equipment housing, which will cause the multi-layer circuit board to be subjected to greater local stress at the connection point. If the screws are tightened too much, this stress concentration will exceed the bearing capacity of the circuit board material, thereby causing the multi-layer circuit board to crack or break. Utility Model Content

[0004] In order to overcome the above defects of the prior art, the utility model provides a multi-layer circuit board structure to solve the problem that screws in the above background technology directly connect the multi-layer circuit board and the device housing, which will cause the multi-layer circuit board to bear greater local stress at the connection point.

[0005] The utility model provides the following technical solutions: a multi-layer circuit board structure, comprising a multi-layer circuit board body, wherein a first protective cover and a second protective cover are respectively arranged at the bottom and the top of the multi-layer circuit board body, the first protective cover and the second protective cover respectively wrap the four sides of the bottom and the four sides of the top of the multi-layer circuit board body, the four corners of the top of the first protective cover are respectively arranged with fixing components, the four corners of the bottom of the second protective cover are respectively arranged with connecting components, the second protective cover can be connected to the first protective cover by connecting the connecting components with the fixing components, and the sides of the first protective cover close to the four corners are arranged with mounting components.

[0006] Furthermore, the fixing assembly includes a threaded barrel and a fixing hole. One end of the threaded barrel is fixedly mounted on the top of the first protective sleeve. The fixing hole is opened on the second protective sleeve and is at the same level as the threaded barrel.

[0007] Furthermore, the connecting assembly includes a screw rod, a rotating rod and two limit blocks. The screw rod is arranged in a threaded barrel and is threadedly connected to the threaded barrel. One end of the rotating rod is fixedly connected to the screw rod, and the other end passes through a fixing hole and slides with the fixing hole. The two limit blocks are fixedly installed on the surface of the rotating rod and are symmetrically arranged. The two limit blocks are located above the second protective cover.

[0008] Furthermore, the mounting assembly includes a mounting plate and a mounting hole. The mounting plate is fixedly mounted on a side surface of the first protective cover, and the mounting hole is opened on the mounting plate.

[0009] Furthermore, a plurality of heat dissipation holes are provided on the first protective cover and the second protective cover.

[0010] Furthermore, the first protective cover and the second protective cover are made of aluminum alloy.

[0011] Technical effects and advantages of the utility model:

[0012] 1. In the utility model, a worker rotates the rotating rod, and the rotating rod drives the screw rod and the two limit blocks to rotate, so that the screw rod enters the threaded barrel, and the two limit blocks contact the top of the second protective cover. The first protective cover and the second protective cover clamp the multi-layer circuit board body in the middle, and the multi-layer circuit board body with the same length and width but different thickness can be fixed, thereby increasing the practicality of the equipment. The first protective cover and the second protective cover respectively wrap the four bottom sides and the four top sides of the multi-layer circuit board body, so that the externally applied pressure can be evenly dispersed to the entire multi-layer circuit board body, avoiding local stress concentration and warping.

[0013] 2. In the utility model, the staff passes the screws through the mounting holes and into the holes opened in the device housing, and connects and fixes the mounting plate to the device housing through the screws, thereby preventing the multi-layer circuit board body from being directly connected to the device housing through the screws, so that the multi-layer circuit board does not need to bear the local stress caused by tightening the screws, thereby preventing the risk of damage to the multi-layer circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the connection assembly of the utility model;

[0016] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of part A.

[0017] The accompanying drawings are marked as follows: 1. Multi-layer circuit board body; 2. First protective cover; 3. Second protective cover; 4. Fixing assembly; 401. Threaded barrel; 402. Fixing hole; 5. Connecting assembly; 501. Screw rod; 502. Rotating rod; 503. Limiting block; 6. Mounting assembly; 601. Mounting plate; 602. Mounting hole; 7. Heat dissipation hole. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0019] Figure 1 to Figure 3 It is the best embodiment of the utility model, and the following Figure 1 ~Attached Figure 3 The utility model is further described.

[0020] The utility model discloses a multi-layer circuit board structure, comprising a multi-layer circuit board body 1, wherein a first protective cover 2 and a second protective cover 3 are respectively arranged at the bottom and the top of the multi-layer circuit board body 1, wherein the first protective cover 2 and the second protective cover 3 respectively wrap the four sides of the bottom and the four sides of the top of the multi-layer circuit board body 1, wherein the first protective cover 2 is provided with a fixing component 4 at the four corners of the top, and the second protective cover 3 is provided with a connecting component 5 at the four corners of the bottom, wherein the second protective cover 3 can be connected to the first protective cover 2 by connecting the connecting component 5 with the fixing component 4, and the side surfaces of the first protective cover 2 near the four corners are provided with mounting components 6.

[0021] In the implementation scheme, when in use, the staff puts the first protective cover 2 and the second protective cover 3 on the multi-layer circuit board body 1, so that the first protective cover 2 and the second protective cover 3 respectively wrap the four bottom sides and the four top sides of the multi-layer circuit board body 1. At this time, the connecting component 5 is in contact with the fixing component 4, and the connecting component 5 is connected to the fixing component 4 by the staff. Through the connecting component 5 and the fixing component 4, the second protective cover 3 and the first protective cover 2 are clamped and fixed to the middle multi-layer circuit board body 1. By wrapping the four bottom sides and the four top sides of the multi-layer circuit board body 1 with the first protective cover 2 and the second protective cover 3 respectively, the externally applied pressure can be evenly dispersed to the entire multi-layer circuit board body 1 to avoid warping caused by local stress concentration. The installation component 6 is connected to the device housing by screws, and there is no need to directly connect to the device housing through the multi-layer circuit board body 1.

[0022] Specifically, the fixing component 4 includes a threaded barrel 401 and a fixing hole 402, one end of the threaded barrel 401 is fixedly installed on the top of the first protective sleeve 2, the fixing hole 402 is opened on the second protective sleeve 3 and is at the same level as the threaded barrel 401, the connecting component 5 includes a screw rod 501, a rotating rod 502 and two limit blocks 503, the screw rod 501 is arranged in the threaded barrel 401 and is threadedly connected to the threaded barrel 401, one end of the rotating rod 502 is fixedly connected to the screw rod 501, and the other end passes through the fixing hole 402 and is slidably matched with the fixing hole 402, the two limit blocks 503 are fixedly installed on the surface of the rotating rod 502, and are symmetrically arranged. The two limit blocks 503 are located above the second protective sleeve 3.

[0023] In this embodiment, when the first protective cover 2 and the second protective cover 3 respectively wrap the four sides of the bottom and the four sides of the top of the multi-layer circuit board body 1, the staff holds the rotating rod 502 by hand to make the screw rod 501 pass through the fixing hole 402 and contact the threaded barrel 401. At this time, the staff rotates the rotating rod 502, and the rotating rod 502 drives the screw rod 501 and the two limit blocks 503 to rotate, so that the screw rod 501 enters the threaded barrel 401. At this time, the two limit blocks 503 contact the top of the second protective cover 3. At this time, the first protective cover 2 and the second protective cover 3 clamp the multi-layer circuit board body 1 in the middle, and can fix the multi-layer circuit board body 1 of the same length and width but different thicknesses, thereby increasing the applicability of the equipment. When disassembly is required, the staff rotates the rotating rod 502 in the opposite direction to make the screw rod 501 detach from the threaded barrel 401. At this time, the first protective cover 2 and the second protective cover 3 will no longer clamp and fix the multi-layer circuit board body 1 in the middle.

[0024] Specifically, the mounting assembly 6 includes a mounting plate 601 and a mounting hole 602 . The mounting plate 601 is fixedly mounted on the side of the first protective cover 2 , and the mounting hole 602 is opened on the mounting plate 601 .

[0025] In this embodiment, when the multi-layer circuit board body 1 is clamped and fixed by the first protective cover 2 and the second protective cover 3, the staff will assemble the circuit board and the device housing. At this time, the staff will use screws to pass through the mounting holes 602 and enter the holes opened in the device housing. The mounting plate 601 is connected and fixed to the device housing through screws to prevent the multi-layer circuit board body 1 from being directly connected to the device housing through screws.

[0026] Specifically, a plurality of heat dissipation holes 7 are formed on the first protective cover 2 and the second protective cover 3 .

[0027] In this embodiment, the heat dissipation of the first protective cover 2 and the second protective cover 3 can be increased by using a plurality of heat dissipation holes 7 .

[0028] Specifically, the first protective cover 2 and the second protective cover 3 are made of aluminum alloy.

[0029] In this embodiment, the aluminum alloy has good heat dissipation performance and structural strength.

[0030] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A multi-layer circuit board structure, comprising a multi-layer circuit board body (1), characterized in that: The bottom and top of the multi-layer circuit board body (1) are respectively provided with a first protective cover (2) and a second protective cover (3), the first protective cover (2) and the second protective cover (3) respectively wrap the four sides of the bottom and the four sides of the top of the multi-layer circuit board body (1), the four corners of the top of the first protective cover (2) are provided with fixing components (4), the four corners of the bottom of the second protective cover (3) are provided with connecting components (5), the second protective cover (3) can be connected to the first protective cover (2) by connecting the connecting components (5) with the fixing components (4), and the side surfaces of the first protective cover (2) close to the four corners are provided with mounting components (6); The connection assembly (5) comprises a screw rod (501), a rotating rod (502) and two limit blocks (503); the screw rod (501) is arranged in the threaded barrel (401) and is threadedly connected to the threaded barrel (401); one end of the rotating rod (502) is fixedly connected to the screw rod (501), and the other end of the rotating rod (502) passes through the fixing hole (402) and is slidably matched with the fixing hole (402); the two limit blocks (503) are fixedly mounted on the surface of the rotating rod (502) and are symmetrically arranged. The two limit blocks (503) are located above the second protective cover (3).

2. A multi-layer circuit board structure according to claim 1, characterized in that: The fixing assembly (4) comprises a threaded barrel (401) and a fixing hole (402); one end of the threaded barrel (401) is fixedly mounted on the top of the first protective sleeve (2); the fixing hole (402) is formed on the second protective sleeve (3) and is at the same level as the threaded barrel (401).

3. A multi-layer circuit board structure according to claim 1, characterized in that: The mounting assembly (6) comprises a mounting plate (601) and a mounting hole (602); the mounting plate (601) is fixedly mounted on a side surface of the first protective cover (2); and the mounting hole (602) is formed on the mounting plate (601).

4. A multi-layer circuit board structure according to claim 1, characterized in that: The first protective cover (2) and the second protective cover (3) are provided with a plurality of heat dissipation holes (7).

5. A multi-layer circuit board structure according to claim 1, characterized in that: The first protective cover (2) and the second protective cover (3) are made of aluminum alloy.

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