Waterproof circuit board

Abstract

The utility model relates to the technical field of circuit board protection, in particular to a waterproof circuit board which comprises a lower shell, an upper shell, bolts, a sealing strip and a circuit board, the upper shell is hinged to the top of the lower shell, the bolts are arranged on the two sides of the outer portion of the lower shell and the two sides of the outer portion of the upper shell in a threaded penetrating mode, and the sealing strip is arranged on the top of the lower shell in an embedded mode. The sealing strip is in close contact with the bottom of the upper shell, a circuit board with the outline matched with the inner wall of the lower shell is slidably arranged at the inner bottom of the lower shell, and the outer surface of the circuit board is coated with a waterproof coating. According to the utility model, through the synergistic effect of components such as the sealing strip, the rubber pad, the wedge-shaped rod, the spring system and the wire conduit, a multi-layer sealing barrier is constructed, and water vapor and liquid are effectively prevented from entering the circuit board; through a sliding circuit board insertion mode and a detachable shell design, subsequent inspection, maintenance and upgrading are facilitated, operation can be completed without complex tools, and time and cost are saved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board protection technology, and in particular to a waterproof circuit board. Background Technology

[0002] Waterproofing circuit boards (PCBs) is done to protect the electronic components and conductive paths on them from damage by water or other liquids, thereby ensuring the normal operation of the circuit and extending its service life.

[0003] Currently, some circuit boards with waterproof performance have been produced on the market. For example, Chinese patent CN219437218U discloses a waterproof circuit board that aims to solve the problem that when circuit boards are used in humid environments, they may become damp, which could lead to short circuits in the electrical components and damage to the circuit board. This patent solves the problem by using a combination of a fixed chamber, a protective chamber, a baffle, a circuit board, a limiting groove, a limiting plate, a first sealing gasket, water-absorbing resin, a first fixing block, and a first threaded hole. This makes it difficult for moisture to enter the fixed chamber through the gaps between the fixed chamber, the protective chamber, and the baffle.

[0004] Although the aforementioned patents provide a certain degree of waterproof protection, they still have some limitations. The assembly of these patents requires the use of multiple components such as a fixed chamber, a protective chamber, and a baffle, which increases the difficulty and time cost of assembly. Furthermore, the overall system mainly relies on static seals (such as gaskets), which may lose tight contact under vibration or impact conditions, leading to seal failure.

[0005] Therefore, there is an urgent need to develop a waterproof circuit board that is easy to assemble and has good stability. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a waterproof circuit board that is easy to assemble and has good stability.

[0007] The technical solution of this utility model is as follows: a waterproof circuit board, comprising a lower shell, an upper shell, bolts, a sealing strip, a circuit board, guide rails, clamping plates, rubber pads, and a spring. The upper shell is hinged to the top of the lower shell. Bolts are threaded through both the lower shell and the upper shell on their outer sides. A sealing strip is embedded in the top of the lower shell, and the sealing strip is in close contact with the bottom of the upper shell. A circuit board with an outer contour adapted to its inner wall is slidably disposed in the bottom of the lower shell. The circuit board is coated with a waterproof coating. Guide rails are provided on both sides of the bottom of the lower shell, and the bottom of the circuit board is slidably connected to the guide rails. Symmetrical clamping plates are provided on both sides of the inner side wall of the lower shell. Rubber pads are glued to the near ends of the two clamping plates, and the rubber pads are in close contact with the circuit board in the middle. A spring is symmetrically disposed between the clamping plates and the side wall of the lower shell.

[0008] As an improvement to the above solution, it also includes a wedge rod, a mounting bracket, spring two, and spring three. A wedge rod is slidably arranged in the middle of the card plate, and the wedge-shaped end of the wedge rod abuts against the upper end of the circuit board. A mounting bracket is slidably arranged between the side of the two card plates that are far apart and the side wall of the lower housing. The rod-shaped part of the wedge rod slides through the mounting bracket, and multiple spring twos are symmetrically arranged between the wedge rod and the mounting bracket. Spring threes are arranged between the two sides of the mounting bracket and the inside of the card plate.

[0009] As an improvement to the above solution, wire grooves are provided on both sides of the lower housing, and the wires connected to the circuit board pass through these wire grooves.

[0010] As an improvement to the above solution, it also includes a conduit, a fastening cap, a rubber ring, and a locking ring. A conduit is connected to the wire groove of the lower housing. A fastening cap is provided at the end of the conduit. The fastening cap has multiple elastic sealing teeth. A rubber ring is provided in the middle of the fastening cap. The sealing teeth are in close contact with the rubber ring. A locking ring is provided on the external thread of the conduit. The locking ring is in contact with the sealing teeth of the fastening cap. The wires of the circuit board extend from the wire groove to the outside of the conduit. The rubber ring wraps around the outside of the wires.

[0011] As an improvement to the above solution, an auxiliary mounting component is also included. The auxiliary mounting component is symmetrically arranged on one side of the bottom of the lower housing, and a positioning hole is opened in the auxiliary mounting component.

[0012] As an improvement to the above solution, a heat sink is also included, with a heat sink provided on the top of the upper casing to assist in overall heat dissipation.

[0013] The beneficial effects are: 1. This utility model constructs a multi-layered sealing barrier through the synergistic effect of components such as sealing strips, rubber pads, wedge rods, spring systems, and conduits, effectively preventing moisture and liquid from entering the circuit board; the sliding circuit board insertion method and detachable shell design facilitate subsequent inspection, maintenance, and upgrades, and the operation can be completed without complicated tools, saving time and costs.

[0014] 2. This utility model provides elastic buffering for the entire circuit board through springs one and three between the card plate and the side wall of the lower housing. It can automatically adjust its position under slight vibration or impact conditions, maintain stable contact pressure, and ensure a long-term reliable sealing effect.

[0015] 3. This utility model ensures that the wires connecting to the external circuit are not exposed to moisture through the design of the conduit, fastening cap, rubber ring and locking ring, while providing good mechanical protection and reducing the failure rate caused by wire breakage or damage.

[0016] 4. This utility model effectively dissipates the heat generated during operation through the heat sink set on the top of the upper housing, avoiding performance degradation or failure caused by overheating and ensuring long-term stable operation; the auxiliary mounting parts and positioning holes symmetrically set on the bottom of the lower housing simplify the installation process, allowing the circuit board to be quickly and accurately fixed to the designated position. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the sealing strip, circuit board, and card plate components of this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the guide rail, clamping plate, and rubber pad components of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the rubber pad, wedge rod, and mounting bracket components of this utility model.

[0021] Figure 5 This is a partial cross-sectional view of the conduit, fastening strip, and rubber tube of this utility model.

[0022] Figure 6 This is a three-dimensional structural diagram of the bottom of the lower shell of this utility model.

[0023] The following are the labels in the diagram: 1. Lower housing, 2. Upper housing, 21. Bolt, 3. Sealing strip, 4. Circuit board, 5. Waterproof coating, 6. Guide rail, 7. Clamping plate, 8. Rubber pad, 9. Spring 1, 10. Wedge rod, 11. Mounting bracket, 12. Spring 2, 121. Spring 3, 13. Conduit, 14. Fastening cap, 15. Rubber ring, 16. Locking ring, 17. Auxiliary mounting parts, 18. Heat sink. Detailed Implementation

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Example: A waterproof circuit board, such as Figures 1-4 and Figure 6As shown, the device includes a lower housing 1, an upper housing 2, bolts 21, a sealing strip 3, a circuit board 4, a guide rail 6, a clamping plate 7, a rubber pad 8, and a spring 9. The lower housing 1 serves as the main housing space, providing basic physical protection and support. The upper housing 2 is hinged to the top of the lower housing 1 via a hinge structure. The upper housing 2 covers the lower housing 1, forming a complete outer shell and providing an additional layer of physical protection. Bolts 21 are threaded through both the lower housing 1 and the upper housing 2 on their outer sides to fix the upper housing 2 and the lower housing 1, ensuring a tight fit between the two parts. A sealing strip 3 is embedded in the top of the lower housing 1, and the sealing strip 3 is in close contact with the bottom of the upper housing 2. The sealing strip 3 provides an initial sealing barrier to prevent external moisture from entering. A circuit board 4 with an outer profile adapted to its inner wall is slidably installed at the bottom of the lower housing 1. The circuit board 4 carries electronic components and circuits and is the core part of the entire device. Both sides are provided with wire grooves, through which the wires connected to the circuit board 4 pass. The waterproof coating 5 is directly applied to the surface of the circuit board 4 to provide physical protection, reduce aging problems caused by environmental factors, increase the corrosion resistance and water resistance of the circuit board 4, and extend its service life. Guide rails 6 are provided on both sides of the bottom of the lower housing 1. The bottom of the circuit board 4 is slidably connected to the guide rails. The guide rails 6 provide a sliding path for the circuit board 4 to ensure its accurate insertion and positioning. Symmetrical clamping plates 7 are provided on both sides of the inner side wall of the lower housing 1 to hold the circuit board 4. Rubber pads 8 are glued to the near ends of the two clamping plates 7 to enhance the sealing effect and prevent moisture from entering from the side. The rubber pads 8 are in close contact with the circuit board 4 in the middle. Springs 9 are symmetrically arranged between the clamping plates 7 and the side wall of the lower housing 1 to provide elastic support for the clamping plates 7 and ensure that the rubber pads 8 can always maintain good contact pressure even under slight vibration or impact conditions.

[0026] like Figure 3 and Figure 4 As shown, it also includes a wedge rod 10, a mounting bracket 11, a second spring 12, and a third spring 121. The wedge rod 10 is slidably disposed in the middle of the clamping plate 7. The wedge-shaped end of the wedge rod 10 abuts against the upper end of the circuit board 4. The mounting bracket 11 is slidably disposed between the side of the two clamping plates 7 that is far apart and the side wall of the lower housing 1. The rod-shaped part of the wedge rod 10 slides through the mounting bracket 11. The mounting bracket 11 provides a sliding path for the wedge rod 10. Multiple second springs 12 are symmetrically disposed between the wedge rod 10 and the mounting bracket 11. The wedge rod 10 moves inward under the pressure from above, compressing the second spring 12 below. After resetting, it further fixes the circuit board 4 and strengthens the contact force between it and the rubber pad 8. The third spring 121 is disposed between the two sides of the mounting bracket 11 and the inside of the clamping plate 7 to provide additional buffering capacity for the mounting bracket 11, prevent excessive external force from damaging the internal components, and ensure that the mounting bracket 11 can be flexibly adjusted in position.

[0027] like Figure 5As shown, it also includes a conduit 13, a fastening cap 14, a rubber ring 15, and a locking ring 16. The conduit 13 is connected to the wire groove of the lower housing 1 to connect the wire groove of the lower housing 1 to the external circuit, protect the wire from moisture, and provide mechanical protection to reduce the failure rate caused by wire breakage or damage. The end of the conduit 13 is provided with a fastening cap 14 to fix the end of the conduit 13 and ensure the safe lead-out of the wire. The fastening cap 14 is provided with multiple elastic sealing teeth. The rubber ring 15 is provided in the middle of the fastening cap 14. The sealing teeth are in close contact with the rubber ring 15. The threaded part of the conduit 13 is provided with a locking ring 16. The locking ring 16 is in contact with the sealing teeth of the fastening cap 14. By rotating the locking ring 16, it is made to be in close contact with the sealing teeth of the fastening cap 14, further strengthening the sealing of the wire lead-out part. The wire of the circuit board 4 extends out of the conduit 13 from the wire groove. The rubber ring 15 wraps around the outside of the wire, forming an effective waterproof barrier.

[0028] like Figure 6 As shown, it also includes an auxiliary mounting component 17. The auxiliary mounting component 17 is symmetrically arranged on one side of the bottom of the lower housing 1, which makes it easy to fix the entire device to a designated position. The auxiliary mounting component 17 has a positioning hole, which simplifies the drilling and installation process.

[0029] like Figure 1 As shown, it also includes a heat sink 18. The top of the upper housing 2 is provided with a heat sink 18 to assist in overall heat dissipation. The heat sink 18 assists in overall heat dissipation and avoids performance degradation or failure due to excessive temperature.

[0030] During assembly, the circuit board 4 is first coated with a waterproof coating 5 to provide initial protection. Then, it is slidably inserted into the guide rail 6 at the bottom of the lower housing 1. Next, the upper housing 2 is closed to the top of the lower housing 1 via a hinge structure and fixed with bolts 21 on both sides to ensure a tight fit between the two parts. At this time, the sealing strip 3 embedded at the top of the lower housing 1 will be in close contact with the bottom of the upper housing 2, forming the first line of defense for sealing and preventing external moisture from entering. As the circuit board 4 is inserted, the retaining plate 7 is pressed inward, causing the rubber pad 8 to adhere tightly to the surface of the circuit board 4, further enhancing the sealing effect. At the same time, the spring 9 between the retaining plate 7 and the side wall of the lower housing 1 provides elastic support, ensuring that the rubber pad 8 maintains good contact pressure even under slight vibration or impact conditions. When the circuit board 4 is fully installed, the wedge rod 10 is pressed inward by the pressure from above, compressing the lower spring 12. The spring 12, driven by its own extension force, pushes the wedge rod 10 back to its original position, further fixing the circuit board 4 and strengthening the circuit board 4. The contact force between the rubber pad 8 and the mounting bracket 11 maintains a stable seal. In addition, the springs 121 between the two sides of the mounting bracket 11 and the inside of the clamping plate 7 provide additional buffering capacity for the entire device, preventing excessive external force from damaging internal components. Furthermore, to ensure that the wires connected to the external circuit are not damp, the wires connected to the circuit board 4 can be passed through the wire groove and into the wire tube 13, and then fixed by the fastening cap 14 at the end of the wire tube 13. The fastening cap 14 has multiple elastic sealing teeth inside, which, together with the rubber ring 15 in the middle, can tightly wrap the outside of the wires to form an effective waterproof barrier. The locking ring 16 is rotated to make it contact the sealing teeth of the fastening cap 14, further reinforcing the sealing performance of this area. During installation, the auxiliary mounting parts 17 symmetrically arranged on one side of the bottom of the lower housing 1 and the positioning holes inside them make it easy to fix the entire waterproof device in the designated position, while the heat sink 18 on the top of the upper housing 2 helps to dissipate the heat generated by the circuit board 4 during operation, avoiding performance degradation or failure due to excessive temperature.

[0031] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. A waterproof circuit board, characterized in that it includes: The device consists of a lower housing (1), an upper housing (2), bolts (21), a sealing strip (3), a circuit board (4), a guide rail (6), a clamping plate (7), a rubber pad (8), and a spring (9). The upper housing (2) is hinged to the top of the lower housing (1). Bolts (21) are threaded through both the lower housing (1) and the upper housing (2) on their outer sides. A sealing strip (3) is embedded in the top of the lower housing (1), and the sealing strip (3) is in close contact with the bottom of the upper housing (2). A sliding mechanism is installed at the bottom of the lower housing (1). The circuit board (4) is adapted to the inner wall of the outer contour. The circuit board (4) is coated with a waterproof coating (5). Guide rails (6) are provided on both sides of the bottom of the lower housing (1). The bottom of the circuit board (4) is slidably connected to the guide rail. Symmetrical clamping plates (7) are provided on both sides of the inner wall of the lower housing (1). Rubber pads (8) are glued to the near end of the two clamping plates (7). The rubber pads (8) are in close contact with the circuit board (4) in the middle. Springs (9) are symmetrically provided between the clamping plates (7) and the side wall of the lower housing (1).

2. The waterproof circuit board as described in claim 1, characterized in that, It also includes a wedge rod (10), a mounting bracket (11), a second spring (12) and a third spring (121). The wedge rod (10) is slidably arranged in the middle of the card plate (7). The wedge-shaped end of the wedge rod (10) abuts against the upper end of the circuit board (4). The mounting bracket (11) is slidably arranged between the side of the two card plates (7) that are far apart and the side wall of the lower housing (1). The rod-shaped part of the wedge rod (10) slides through the mounting bracket (11). Multiple second springs (12) are symmetrically arranged between the wedge rod (10) and the mounting bracket (11). The third spring (121) is arranged between the two sides of the mounting bracket (11) and the inside of the card plate (7).

3. A waterproof circuit board as described in claim 2, characterized in that, The lower housing (1) has wire grooves on both sides, and the wires connected to the circuit board (4) pass through the wire grooves.

4. A waterproof circuit board as described in claim 3, characterized in that, It also includes a conduit (13), a fastening cap (14), a rubber ring (15) and a locking ring (16). The conduit (13) is connected to the wire groove of the lower housing (1). The end of the conduit (13) is provided with a fastening cap (14). The fastening cap (14) is provided with multiple elastic sealing teeth. The rubber ring (15) is provided in the middle of the fastening cap (14). The sealing teeth are in close contact with the rubber ring (15). The threaded conduit (13) is provided with a locking ring (16). The locking ring (16) is in contact with the sealing teeth of the fastening cap (14). The wires of the circuit board (4) extend out of the conduit (13) from the wire groove. The rubber ring (15) wraps around the outside of the wires.

5. A waterproof circuit board as described in claim 4, characterized in that, It also includes an auxiliary mounting component (17), which is symmetrically arranged on one side of the bottom of the lower housing (1), and a positioning hole is provided in the auxiliary mounting component (17).

6. A waterproof circuit board as described in claim 5, characterized in that, It also includes a heat sink (18), and the top of the upper housing (2) is provided with a heat sink (18) to assist in overall heat dissipation.

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