Waterproof circuit board

Abstract

The utility model belongs to the technical field of circuit boards, and particularly relates to a waterproof circuit board. The waterproof circuit board provided by the utility model comprises a waterproof shell and a circuit board body, the circuit board body is located in the waterproof shell, a waterproof breathable film and a silica gel waterproof film are sequentially adhered to the bottom of the circuit board body, and fixing seats are arranged at four corners of the bottom in the waterproof shell. The four corners of the circuit board body are located at the fixing seats and are fixedly connected with the waterproof shell. A heat dissipation plate is buckled on the top of the waterproof shell, a plurality of heat dissipation fins are arranged on the heat dissipation plate, a corresponding sealing table is arranged at the buckling position of the edge of the waterproof shell and the heat dissipation plate, a sealing rubber ring is arranged in the middle of the sealing table, and a plurality of fixing feet are symmetrically arranged on the two sides of the waterproof shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit boards, and particularly relates to a circuit board convenient for waterproofing. Background Art

[0002] The names of circuit boards include ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, circuit boards, PCB boards, aluminum substrates, high-frequency boards, thick copper boards, impedance boards, PCBs, ultra-thin circuit boards, ultra-thin circuit boards, printed circuit boards, etc. Circuit boards miniaturize and visualize circuits, play an important role in the mass production of fixed circuits and the optimization of electrical appliance layouts, and are providers of electrical connections for electronic components.

[0003] When the current circuit board is installed, it is generally directly installed on the body of the device or directly exposed to the outside. When the device is collided by an external object, the circuit board will be damaged; at the same time, the circuit board does not have corresponding protection and protection devices, so it is easy to be contaminated with dust, which affects the heat dissipation of the circuit board. In case of water leakage, etc., water enters the circuit board, which is likely to cause the circuit board to short-circuit, greatly reducing the service life of the circuit board. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that when the existing circuit board is in use, it may be damaged easily when being collided by an external object, contaminated with dust or leaking water externally, reducing the service life of the circuit board.

[0005] To solve the above technical problem, the technical solution provided by the utility model is: a circuit board convenient for waterproofing, including a waterproof shell and a circuit board body, and the circuit board body is located inside the waterproof shell. A waterproof breathable film and a silicone waterproof film are adhesively connected in sequence at the bottom of the circuit board body. Fixed seats are arranged at the four corners of the inner bottom of the waterproof shell, and the four corners of the circuit board body are fixedly connected with the waterproof shell at the fixed seats; a heat dissipation plate is buckled on the top of the waterproof shell, and a plurality of heat dissipation fins are arranged on the heat dissipation plate. A corresponding sealing platform is arranged at the buckling position of the edge of the waterproof shell and the heat dissipation plate, and a sealing rubber ring is arranged in the middle of the sealing platform. A plurality of fixed feet are symmetrically arranged on both sides of the waterproof shell.

[0006] As an improvement, the length and width of the circuit board body are both smaller than the length and width inside the waterproof shell, and the distance between the circuit board body and the inside of the waterproof shell is the same as the distance that the sealing platform protrudes from the inside of the waterproof shell.

[0007] As an improvement, the fixed seat and the circuit board body are connected by bolts, and a first compression spring is arranged between the bolts and the upper end surface of the circuit board.

[0008] As an improvement, the heat dissipation plate and the heat dissipation fins are made of one of aluminum alloy or copper. The heat dissipation plate matches the shape inside the waterproof shell, and a plurality of heat dissipation fins on the heat dissipation plate are arranged perpendicular to the heat dissipation plate.

[0009] As an improvement, the sealing table is integrally an upward L-shaped structure, and a downward sealing plate is arranged at the bottom edge of the heat dissipation plate at the sealing table. The sealing plate matches the shape inside the waterproof shell. The sealing rubber ring is located between the sealing table and the sealing plate and has the same height as the sealing plate.

[0010] As an improvement, an activity groove is arranged inside the fixed foot. A pressing plate is slidably connected to the top of the activity groove, and a second compression spring is arranged between the pressing plate and the bottom inside the activity groove.

[0011] As an improvement, a through hole penetrating the activity groove and the pressing plate is arranged in the middle of the fixed foot, and a limiting block for restricting the position of the pressing plate is arranged above the pressing plate at the top of the activity groove. The bottom of the fixed foot is on the same plane as the bottom of the waterproof shell, and a gasket is arranged below the fixed foot at the activity groove.

[0012] The advantages of the present utility model compared with the prior art are as follows:

[0013] 1. By arranging a waterproof shell on the outer side of the circuit board body, the circuit board is prevented from being directly damaged by collision. At the same time, by adding springs at the connection points, the circuit board can have a certain buffer when it is vibrated, reducing the possibility of damage to the circuit board.

[0014] 2. By arranging a sealing table and a sealing rubber ring, the present circuit board can isolate external moisture and dust, and can effectively dissipate heat from the circuit board through the heat dissipation plate and a plurality of heat dissipation fins. Description of the Drawings

[0015] Figure 1 It is a structural diagram of a circuit board for facilitating waterproofing of the present utility model.

[0016] Figure 2 It is a sectional three-dimensional structural diagram of a circuit board for facilitating waterproofing of the present utility model.

[0017] Figure 3 It is an enlarged view of the structure at A of a circuit board for facilitating waterproofing of the present utility model.

[0018] Figure 4 It is a sectional three-dimensional structural diagram of the fixed foot of a circuit board for facilitating waterproofing of the present utility model.

[0019] As shown in the figure: 1. Waterproof case; 2. Circuit board body; 3. Waterproof breathable membrane; 4. Silicone waterproof membrane; 5. Fixed seat; 6. Heat dissipation plate; 7. Multiple heat dissipation fins; 8. Sealing platform; 9. Sealing rubber ring; 10. Fixed foot; 11. Bolt; 12. First compression spring; 13. Sealing plate; 14. Activity slot; 15. Pressing plate; 16. Second compression spring; 17. Through hole; 18. Gasket Specific implementation mode

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "provided with", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] Embodiment 1:

[0023] As shown in the attached Figures 1-4 figure, a circuit board convenient for waterproofing includes a waterproof case 1 and a circuit board body 2, and the circuit board body 2 is located inside the waterproof case 1. The length and width of the circuit board body 2 are both smaller than the length and width inside the waterproof case 1. A waterproof breathable membrane 3 and a silicone waterproof membrane 4 are adhesively connected in sequence at the bottom of the circuit board body 2. Fixed seats 5 are arranged at the four corners of the inner bottom of the waterproof case 1. The four corners of the circuit board body 2 are fixedly connected to the waterproof case 1 at the positions of the fixed seats 5. The fixed seats 5 and the circuit board body 2 are connected by bolts 11, and a first compression spring 12 is arranged between the bolts 11 and the upper end surface of the circuit board;

[0024] In the present utility model, a heat dissipation plate 6 is buckled on the top of the waterproof shell 1. A plurality of heat dissipation fins 7 are arranged on the heat dissipation plate 6. The heat dissipation plate 6 and the heat dissipation fins are made of one of aluminum alloy or copper. The heat dissipation plate 6 matches the shape inside the waterproof shell 1. A plurality of heat dissipation fins 7 on the heat dissipation plate 6 are arranged perpendicular to the heat dissipation plate 6. A corresponding sealing platform 8 is arranged at the buckling part of the edge of the waterproof shell 1 and the heat dissipation plate 6. A sealing rubber ring 9 is arranged in the middle of the sealing platform 8. The distance between the circuit board body 2 and the inside of the waterproof shell 1 is the same as the distance that the sealing platform 8 protrudes from the inside of the waterproof shell 1. The sealing platform 8 is an upward L-shaped structure as a whole. A downward sealing plate 13 is arranged at the bottom edge of the heat dissipation plate 6 at the sealing platform 8. The sealing plate 13 matches the shape inside the waterproof shell 1. The sealing rubber ring 9 is located between the sealing platform 8 and the sealing plate 13 and has the same height as the sealing plate 13.

[0025] In the present utility model, a plurality of fixing feet 10 are symmetrically arranged on both sides of the waterproof shell 1. An activity groove 14 is arranged inside the fixing feet 10. A pressing plate 15 is slidably connected to the top of the activity groove 14. A second compression spring 16 is arranged between the pressing plate 15 and the bottom inside the activity groove 14. A through hole 17 penetrating through the activity groove 14 and the pressing plate 15 is arranged in the middle of the fixing feet 10. A limiting block for restricting the position of the pressing plate 15 is arranged above the pressing plate 15 at the top of the activity groove 14. The bottom of the fixing feet 10 is on the same plane as the bottom of the waterproof shell 1. A gasket 18 is arranged below the activity groove 14 of the fixing feet 10.

[0026] When the present utility model is specifically implemented, the circuit board body 2 is fixed at the fixing seats 5 at the four corners inside the waterproof shell 1 through bolts 11 and first compression springs 12 at the four corners, so that the circuit board body 2 is placed in suspension. An empty groove is formed between the circuit board body 2 and the edge inside the waterproof shell 1. Water and the like entering from above can enter the bottom of the waterproof shell 1 through the empty groove and will not remain on the circuit board. A waterproof breathable film 3 and a silicone waterproof film 4 are arranged at the bottom of the circuit board body 2 to prevent water vapor below from causing a short circuit at the welding part of the circuit board body 2. Through the sealing platform 8 inside the upper part of the waterproof shell 1, the sealing plate 13 at the bottom of the heat dissipation plate 6 and the sealing rubber ring 9, external moisture, dust and the like can be effectively prevented from entering the inside of the waterproof shell 1, and the heat dissipation plate 6 and a plurality of heat dissipation fins 7 dissipate heat from the circuit board body 2.

[0027] The above describes the present utility model and its implementation manners. This description is not restrictive. What is shown in the specific implementation manners is only one of the implementation manners of the present utility model. The actual structure is not limited to this. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative purpose of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A circuit board that is easy to waterproof, comprising a waterproof shell and a circuit board body, wherein the circuit board body is located inside the waterproof shell, characterized in that: The bottom of the circuit board body is adhered with a waterproof breathable film and a silicone waterproof film in sequence, and the four corners of the bottom of the waterproof shell are provided with fixing seats, and the four corners of the circuit board body are located at the fixing seats and fixedly connected with the waterproof shell; The top of the waterproof shell is buckled with a heat sink, and a plurality of heat sink fins are arranged on the heat sink. A corresponding sealing platform is arranged at the buckling position between the edge of the waterproof shell and the heat sink, and a sealing rubber ring is arranged in the middle of the sealing platform. A plurality of fixing feet are symmetrically arranged on both sides of the waterproof shell.

2. A waterproof circuit board according to claim 1, characterized in that: The length and width of the circuit board body are both smaller than the length and width of the interior of the waterproof shell, and the distance between the circuit board body and the interior of the waterproof shell is the same as the distance that the sealing platform protrudes from the interior of the waterproof shell.

3. A waterproof circuit board according to claim 1, characterized in that: The fixing seat is connected to the circuit board body via bolts, and a first compression spring is arranged between the bolts and the upper end surface of the circuit board.

4. A waterproof circuit board according to claim 1, characterized in that: The heat sink and the heat sink fins are made of aluminum alloy or copper. The heat sink matches the shape of the interior of the waterproof shell, and the multiple heat sink fins on the heat sink are arranged vertically to the heat sink.

5. A waterproof circuit board according to claim 1, characterized in that: The sealing platform is an upward L-shaped structure as a whole, and a downward sealing plate is provided at the bottom edge of the heat dissipation plate at the sealing platform. The sealing plate matches the shape of the interior of the waterproof shell. The sealing rubber ring is located between the sealing platform and the sealing plate and has the same height as the sealing plate.

6. A waterproof circuit board according to claim 1, characterized in that: A movable groove is arranged inside the fixed foot, a pressing plate is slidably connected to the top of the movable groove, and a second compression spring is arranged between the pressing plate and the bottom of the movable groove.

7. A waterproof circuit board according to claim 6, characterized in that: A through hole penetrating the movable groove and the pressure plate is provided in the middle of the fixed foot, and a limit block for limiting the position of the pressure plate is provided at the top of the movable groove above the pressure plate, the bottom of the fixed foot and the bottom of the waterproof shell are on the same plane, and a gasket is provided below the movable groove of the fixed foot.

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