Moisture resistant circuit board with protective coating

Abstract

The utility model relates to the technical field of moistureproof circuit board, specifically is a kind of moistureproof circuit board with protective coating, including shell, the shell is fixed with main body mechanism and fixed mechanism, the fixed mechanism includes mounting block and bracing piece, the shell is fixedly connected with two groups of mounting block symmetrically, the mounting block is fixedly connected with bracing piece, bracing piece is sleeved with water-absorbing cotton, the bracing piece is fixedly connected with a plurality of gaskets, the gasket is placed with circuit board body, the circuit board body is equipped with waterproof layer, the waterproof layer is equipped with drainage groove, the bracing piece is threadedly connected with limit rod, the limit rod is through the inner wall of circuit board body;Through bracing piece and gasket, circuit board body bottom is separated from shell, and through water-absorbing cotton, the condensed water generated in shell is adsorbed, and the setting of waterproof layer and drainage groove also facilitates guiding condensed water, to avoid local water accumulation on waterproof layer.

Description

Technical Field

[0001] This utility model relates to a moisture-proof circuit board, specifically a moisture-proof circuit board with a protective coating, belonging to the technical field of moisture-proof circuit boards. Background Technology

[0002] Circuit boards are essential basic components in the electronics industry, mainly used for the electrical connection and physical support of electronic components. Moisture-proof circuit boards are PCBs that significantly reduce moisture absorption and prevent moisture corrosion through material selection, processing, or coating technology, making them suitable for high humidity, large temperature difference, or outdoor environments.

[0003] However, when the equipment moves from a high-temperature environment to a low-temperature environment, the internal temperature of the equipment will be higher than the external temperature. The cold surface causes water vapor inside to condense, forming condensate. The condensate accumulates on the waterproof layer on the surface of the circuit board. Long-term water accumulation may seep into the PCB substrate through micro-cracks in the coating, leading to damage to the circuit board. Utility Model Content

[0004] The purpose of this utility model is to provide a moisture-proof circuit board with a protective coating to solve the above problems. The bottom of the circuit board body is separated from the shell by a support rod and a gasket, and the condensate generated inside the shell is absorbed by the water-absorbing cotton. At the same time, the waterproof layer and the drainage channel are designed to facilitate the guidance of condensate and avoid local water accumulation on the waterproof layer.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a moisture-proof circuit board with a protective coating includes a housing, on which a main body mechanism and a fixing mechanism are fixed. The fixing mechanism includes mounting blocks and support rods. Two sets of mounting blocks are symmetrically fixedly connected to the housing. Support rods are fixedly connected to the mounting blocks. Water-absorbing cotton is sleeved on the support rods. Several gaskets are fixedly connected to the support rods. A circuit board body is placed on the gaskets. A waterproof layer is provided on the circuit board body. A drainage groove is provided in the waterproof layer. A limit rod is threadedly connected to the support rod. The limit rod penetrates the inner wall of the circuit board body.

[0006] Preferably, the absorbent cotton has a plurality of through holes, and the cross-sectional diameter of the through holes is equal to the cross-sectional diameter of the top of the support rod.

[0007] Preferably, the absorbent cotton is located at the bottom of the circuit board body, and the absorbent cotton is in contact with the mounting block.

[0008] Preferably, the fixing mechanism further includes an insertion hole, the support rod has an insertion hole, and a limit rod is threadedly installed at the insertion hole.

[0009] Preferably, the top end of the limiting rod is a regular hexagonal structure, and the gasket is an arc-shaped structure.

[0010] Preferably, the main body includes a fixing block and a limiting bolt, and fixing blocks are fixedly connected to both sides of the housing, with the limiting bolts threaded into the fixing blocks.

[0011] Preferably, the main body further includes a dustproof net, which is fixedly installed on the shell and communicates with the interior of the shell.

[0012] Preferably, the main body structure further includes through slots, and a plurality of through slots are provided at equal intervals at the end of the housing away from the dustproof net, and the part of the housing near the through slots is provided with an inclined structure.

[0013] Preferably, the drainage channel is U-shaped, and the waterproof layer is located on the top of the circuit board body.

[0014] The beneficial effects of this utility model are as follows: When installing the circuit board body, the absorbent cotton can be first fitted onto the side wall of the support rod. When the bottom end of the absorbent cotton contacts the mounting block, the absorbent cotton can be installed inside the housing. The top of the support rod has several equidistant pads arranged in a ring. The circuit board body is placed on the pads, and the mounting holes inside the pads are aligned with the support rod. Then, the limiting rod is threaded into the inside of the support rod. When the limiting rod contacts the waterproof layer on the circuit board body, the circuit board body can be fixed on the pads. The support rod separates the bottom end of the circuit board body from the housing. When condensation occurs inside the housing, the absorbent cotton can quickly absorb and lock in the moisture, preventing water droplets from contacting the circuit board body. The waterproof layer has drainage channels. The drainage channels guide the liquid to non-sensitive areas (such as the board edge or drainage holes) through a physical groove structure, thereby avoiding local water accumulation in the waterproof layer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the shell and the fixing block of this utility model;

[0017] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 4 This is a schematic diagram of the connection structure between the waterproof layer and the drainage channel of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure between the limiting rod and the support rod of this utility model;

[0020] Figure 6 for Figure 5 The diagram shown is an enlarged view of the structure of section B.

[0021] Figure 7 This is a schematic diagram of the connection structure between the shell and the dustproof net of this utility model.

[0022] In the diagram: 1. Shell; 2. Main body; 201. Dustproof net; 202. Through groove; 203. Fixing block; 204. Limiting bolt; 3. Waterproof layer; 4. Drainage groove; 5. Fixing mechanism; 501. Limiting rod; 502. Mounting block; 503. Support rod; 504. Gasket; 505. Insertion hole; 6. Absorbent cotton; 7. Circuit board body; 8. Through hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-7 As shown, a moisture-proof circuit board with a protective coating includes a housing 1. A main body mechanism 2 and a fixing mechanism 5 are fixed to the housing 1. The fixing mechanism 5 includes mounting blocks 502 and support rods 503. Two sets of mounting blocks 502 are symmetrically fixed to the housing 1. Support rods 503 are fixedly connected to the mounting blocks 502. Absorbent cotton 6 is sleeved on the support rods 503. Several gaskets 504 are fixedly connected to the support rods 503. The circuit board body 7 is placed on the top of the gaskets 504, and then... The mounting holes provided inside are aligned with the insertion holes 505 provided inside the support rod 503. Then, the limiting rod 501 is threaded into the support rod 503. When the limiting rod 501 contacts the waterproof layer 3, the circuit board body 7 can be fixed on the gasket 504. The circuit board body 7 is placed on the gasket 504. The circuit board body 7 is provided with the waterproof layer 3. The waterproof layer 3 is provided with the drainage groove 4. The limiting rod 501 is threadedly connected to the support rod 503. The limiting rod 501 penetrates the inner wall of the circuit board body 7.

[0025] As a technical optimization of this utility model, the absorbent cotton 6 is provided with a plurality of through holes 8. The cross-sectional diameter of the through holes 8 is equal to the cross-sectional diameter of the top of the support rod 503. The absorbent cotton 6 is located at the bottom of the circuit board body 7 and is in contact with the mounting block 502. When condensation occurs inside the housing 1, the absorbent cotton 6 can quickly absorb and lock in the moisture to prevent water droplets from contacting the circuit board body 7.

[0026] As a technical optimization of this utility model, the fixing mechanism 5 further includes a socket 505. The support rod 503 is provided with a socket 505. A limiting rod 501 is threadedly installed at the socket 505. The top of the limiting rod 501 is set in a regular hexagonal structure. The gasket 504 is set in an arc surface structure. The gasket 504 supports the circuit board body 7 and can fix it to the top of the gasket 504 by the limiting rod 501.

[0027] As a technical optimization of this utility model, the main body mechanism 2 includes a fixing block 203 and a limiting bolt 204. The fixing blocks 203 are fixedly connected to both sides of the housing 1. The fixing blocks 203 are internally threaded with the limiting bolts 204. When fixing the housing 1, the fixing blocks 203 can be installed inside the equipment through the limiting bolts 204, thereby positioning the housing 1. A dustproof net 201 is fixedly installed on the housing 1. The dustproof net 201 communicates with the interior of the housing 1 and can dissipate heat from the interior of the housing 1 through the dustproof net 201. A number of through slots 202 are provided at equal intervals at one end of the housing 1 away from the dustproof net 201. The part of the housing 1 near the through slots 202 is set with an inclined structure. The through slots 202 can drain the condensate generated inside the housing 1.

[0028] As a technical optimization of this utility model, the drainage channel 4 is arranged in a U-shape, and the waterproof layer 3 is located on the top of the circuit board body 7. The drainage channel 4 is arranged in a U-shape, and the liquid can be directed to non-sensitive areas (such as the edge of the board or the drainage hole) through the drainage channel 4, thereby avoiding local water accumulation in the waterproof layer 3.

[0029] In use, when installing the circuit board body 7, the absorbent cotton 6 can be first fitted onto the side wall of the support rod 503. Since the diameter of the through hole 8 inside the absorbent cotton 6 is equal to the diameter of the top end of the support rod 503, the absorbent cotton 6 can be fitted onto the support rod 503. When the bottom end of the absorbent cotton 6 contacts the mounting block 502, the absorbent cotton 6 can be installed inside the housing 1. Since the top end of the support rod 503 has several equidistant annular pads 504, the circuit board body 7 is placed on the top of the pads 504, and the mounting holes inside the pads are aligned with the insertion holes 505 inside the support rod 503. Then, the limiting rod 501 is threaded into the inside of the support rod 503. When the limiting rod 501 contacts the waterproof layer 3 on the circuit board body 7, the circuit board body 7 can be fixed on the gasket 504; the support rod 503 separates the bottom end of the circuit board body 7 from the housing 1, so that when condensation occurs inside the housing 1, the absorbent cotton 6 can quickly absorb and lock in the moisture, preventing water droplets from contacting the circuit board body 7; the waterproof layer 3 is provided with a drainage channel 4, which is set in a U-shaped structure. The drainage channel 4 can guide the liquid to non-sensitive areas (such as the edge of the board or the drain hole), thereby avoiding local water accumulation in the waterproof layer 3; when fixing the housing 1, the fixing block 203 can be installed inside the equipment by the limiting bolt 204, thereby positioning the housing 1.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A moisture-proof circuit board with a protective coating, comprising a housing (1), characterized in that: The housing (1) is fixed with a main body mechanism (2) and a fixing mechanism (5). The fixing mechanism (5) includes a mounting block (502) and a support rod (503). Two sets of mounting blocks (502) are symmetrically fixedly connected to the housing (1). The mounting blocks (502) are fixedly connected with support rods (503). The support rods (503) are fitted with absorbent cotton (6). The support rods (503) are fixedly connected with several gaskets (504). The circuit board body (7) is placed on the gaskets (504). The circuit board body (7) is provided with a waterproof layer (3). The waterproof layer (3) is provided with a drainage groove (4). The support rods (503) are threadedly connected with a limiting rod (501). The limiting rod (501) penetrates the inner wall of the circuit board body (7).

2. A moisture-proof circuit board with a protective coating according to claim 1, characterized in that: The absorbent cotton (6) has several through holes (8), and the cross-sectional diameter of the through holes (8) is equal to the cross-sectional diameter of the top of the support rod (503).

3. A moisture-proof circuit board with a protective coating according to claim 1, characterized in that: The absorbent cotton (6) is located at the bottom of the circuit board body (7) and the absorbent cotton (6) is in contact with the mounting block (502).

4. A moisture-proof circuit board with a protective coating according to claim 1, characterized in that: The fixing mechanism (5) also includes a socket (505), and the support rod (503) is provided with a socket (505), and a limit rod (501) is threadedly installed at the socket (505).

5. A moisture-proof circuit board with a protective coating according to claim 1, characterized in that: The top of the limiting rod (501) is a regular hexagonal structure, and the gasket (504) is an arc-shaped structure.

6. A moisture-proof circuit board with a protective coating according to claim 1, characterized in that: The main body (2) includes a fixing block (203) and a limiting bolt (204). The fixing blocks (203) are fixedly connected to both sides of the housing (1), and the limiting bolts (204) are threadedly connected to the fixing blocks (203).

7. A moisture-proof circuit board with a protective coating according to claim 6, characterized in that: The main body (2) also includes a dustproof net (201), which is fixedly installed on the shell (1) and is connected to the interior of the shell (1).

8. A moisture-proof circuit board with a protective coating according to claim 6, characterized in that: The main body (2) also includes through grooves (202). The shell (1) is provided with several through grooves (202) at equal intervals at one end away from the dustproof net (201). The part of the shell (1) near the through grooves (202) is set with an inclined structure.

9. A moisture-proof circuit board with a protective coating according to claim 1, characterized in that: The drainage channel (4) is U-shaped, and the waterproof layer (3) is located on the top of the circuit board body (7).

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