Waterproof FPC flexible printed circuit board

Abstract

The utility model relates to the technical field of circuit boards, in particular to a waterproof FPC (Flexible Printed Circuit), which comprises a waterproof shell, a circuit board main body arranged at the inner side of the waterproof shell, a waterproof cover arranged at the top end of the waterproof shell, heat dissipation grooves arranged at two ends of the outer wall of the waterproof shell, and a plurality of groups of bumps arranged at the bottom end of the inner side of the waterproof shell, the waterproof shell and the waterproof cover are provided with a connection ventilation mechanism, the connection ventilation mechanism comprises a clamping assembly and a ventilation waterproof assembly, the clamping assembly is used for locking or unlocking the position of the waterproof cover, and the ventilation waterproof assembly is used for improving the heat dissipation effect and preventing water from entering; the waterproof cover is simple in structure and convenient to operate, deformation and damage of a connecting part caused by force breaking-off when the waterproof cover is disassembled and assembled are avoided, damage to the part when the part is disassembled and assembled is reduced, and the practicability of the structure is further improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, specifically to a waterproof FPC flexible printed circuit board. Background Technology

[0002] Circuit boards utilize a base insulating material to isolate the surface copper foil conductive layer, allowing current to flow along a pre-designed path through various components to perform functions such as work, amplification, attenuation, modulation, demodulation, and encoding. Common board layer structures include single-layer boards, double-layer boards, and multi-layer boards. However, existing technologies still have problems. Current FPC circuit boards are usually directly installed and fixed with bolts, which is inconvenient for later disassembly and maintenance. Secondly, FPC circuit boards have poor waterproof performance, and moisture or rainwater can easily damage the circuit boards, resulting in certain limitations in their use.

[0003] To address the aforementioned technical issues, Chinese Patent No. CN220023163U discloses a backlight FPC circuit board with high waterproof performance, comprising a device body, which includes a mounting base, a mounting device, and a waterproof device. The waterproof device is located at the upper end of the mounting base, and the mounting device is located outside the waterproof device. The mounting device includes a through hole, a waterproof shell, mounting holes, a waterproof cover, and a fixing post. The mounting base has four through holes, and the waterproof shell is fixedly connected to the upper end of the mounting base. Mounting holes are provided at the four corners of the waterproof shell.

[0004] While the aforementioned existing technical solution improves the waterproof performance and enhances the practicality of the circuit board by incorporating a waterproof device, the waterproof cover and shell are positioned and installed using fixing posts and mounting holes. The fixing posts and mounting holes are interlocked, requiring personnel to align the fixing posts with the mounting holes and forcefully push them into place during assembly. Disassembly and maintenance require personnel to forcefully pry along the joint between the waterproof cover and shell. The disassembly and assembly process involves considerable force, which can easily damage the components at the connection points during operation, thereby affecting the subsequent use effect. Summary of the Invention

[0005] (1) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a waterproof FPC (Flexible Printed Circuit) circuit board. This device aims to solve the technical problem that in existing technologies, the waterproof cover and shell are positioned and installed using fixing posts and mounting holes. The fixing posts and mounting holes are fitted together, requiring personnel to align and forcefully push the fixing posts into the mounting holes during assembly. Disassembly and maintenance require personnel to forcefully pry along the joint between the waterproof cover and shell. The considerable force involved in these processes easily damages the connecting components, thus affecting subsequent performance.

[0007] (2) Technical solution

[0008] To address the aforementioned technical problems, this utility model provides a waterproof FPC flexible printed circuit board, comprising a waterproof shell, a circuit board body mounted on the inner side of the waterproof shell, a waterproof cover mounted on the top of the waterproof shell, heat dissipation grooves at both ends of the outer wall of the waterproof shell, multiple sets of protrusions arranged at the bottom of the inner side of the waterproof shell, and a connecting and ventilating mechanism mounted on the waterproof shell and the waterproof cover. The connecting and ventilating mechanism includes a snap-fit ​​component and a ventilated and waterproof component. The snap-fit ​​component is used to lock or unlock the position of the waterproof cover, and the ventilated and waterproof component is used to increase heat dissipation and prevent moisture from entering.

[0009] When using a waterproof FPC flexible printed circuit board according to this solution, the waterproof cover can be overlapped on the surface of the rubber pad, allowing the pressure block to enter the inner side of the pressure groove through the through hole. By pressing the waterproof cover down slightly, the pressure block continues to move towards the inner side of the pressure groove. The two ends of the pressure block abut against the protruding ends of the movable plate. With the help of multiple sets of inclined surfaces, the movable plate is forced to compress the two sets of first springs to retract. After the pressure block is fully pushed into the inner wall of the pressure groove, the two sets of movable plates are no longer obstructed and are driven out by the first springs, abutting against the protruding ends on both sides of the pressure block to lock the waterproof cover. The structure is simple and easy to operate, avoiding deformation and damage to the connecting parts caused by forceful bending when disassembling and assembling the waterproof cover, reducing the damage to the parts during disassembly and assembly, and further improving the practicality of the structure.

[0010] Preferably, the snap-fit ​​assembly includes a pressure block installed on one side of the bottom end of the waterproof cover, a pressure groove is provided on the top of the waterproof shell, the pressure block and the pressure groove are slidably connected, and movable grooves are provided on both sides of the pressure groove inside the waterproof shell. Movable plates are slidably connected inside the movable grooves, and a first spring is installed between the two ends of one side of the movable plate and the inner wall of the movable groove.

[0011] Furthermore, the inner sides of the movable groove and the pressure groove are connected. The movable plate has an L-shaped cross-section, and the pressure block has a T-shaped cross-section. The opposite ends of the two sets of movable plates and pressure blocks are provided with mutually fitting inclined surfaces. A rubber pad is embedded in the top of the waterproof shell. A through hole is provided inside the rubber pad corresponding to the pressure groove. The pressure block and the through hole are slidably connected.

[0012] Furthermore, a pull rod is installed on one side of the movable plate between the two sets of first springs, a sliding groove is opened on one side of the outer wall of the waterproof shell, and a drag groove is opened at both ends of the inner wall of the sliding groove. The other end of the drag groove is connected to the inner side of the movable groove. The pull rod is slidably connected to the drag groove, and a sliding plate is installed at one end of the pull rod that extends to the inner side of the sliding groove.

[0013] Furthermore, one side of the sliding plate is provided with a snap-pull groove, the sliding plate and the sliding groove are slidably connected, and the opposite ends of the two sets of sliding plates are each embedded with a first fixing member, and the two ends of the inner wall of the sliding groove are each embedded with a second fixing member corresponding to the first fixing member.

[0014] Furthermore, one of the first fixing member and the second fixing member is a first magnet, and the other of the first fixing member and the second fixing member is a second magnet. The magnetic poles of the first magnet and the second magnet are opposite and attract each other.

[0015] Furthermore, the breathable and waterproof component includes multiple ventilation channels formed inside the protrusions and the waterproof shell. The side cross-section of the ventilation channel is cross-shaped. Waterproof and breathable membranes are installed at both ends of the ventilation channel and on the inner side of the heat dissipation channel. The waterproof and breathable membranes are TPU waterproof and breathable films.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, the position of the waterproof cover is locked or unlocked by a snap-fit ​​component. The breathable and waterproof component is used to increase heat dissipation and prevent water from entering. The structure is simple and easy to operate. It avoids deformation and damage to the connecting parts caused by forceful bending when disassembling and assembling the waterproof cover, reduces the damage to the parts when disassembling and assembling the parts, and further improves the practicality of the structure.

[0019] 2. In this utility model, the waterproof and breathable membrane can prevent external moisture from entering the inside of the waterproof shell while ensuring air circulation inside the waterproof shell. The ventilation slots and heat dissipation slots allow external airflow to enter and internal heat to dissipate, thus improving the overall heat dissipation effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the detachable structure of the waterproof cover of this utility model;

[0022] Figure 3 This is a schematic diagram of the main structure of the circuit board of this utility model;

[0023] Figure 4 This is a partial three-dimensional structural diagram of the waterproof shell of this utility model;

[0024] Figure 5 This is a partial cross-sectional view of the snap-fit ​​assembly of this utility model;

[0025] Figure 6 This is a partial cross-sectional view of the breathable and waterproof component of this utility model.

[0026] In the diagram: 1. Waterproof shell; 2. Circuit board body; 3. Waterproof cover; 4. Heat dissipation groove; 5. Protrusion; 6. Sliding groove; 7. Pressure block; 8. Movable plate; 9. First spring; 10. Inclined surface; 11. Pull rod; 12. Sliding plate; 13. Buckle groove; 14. First fixing component; 15. Second fixing component; 16. Ventilation groove; 17. Waterproof and breathable membrane; 18. Rubber pad. Detailed Implementation

[0027] This specific embodiment is a waterproof FPC flexible printed circuit board, the structural diagram of which is shown below. Figure 1-6 As shown, a waterproof FPC flexible printed circuit board includes a waterproof shell 1, a circuit board body 2 installed inside the waterproof shell 1, a waterproof cover 3 installed at the top of the waterproof shell 1, heat dissipation grooves 4 at both ends of the outer wall of the waterproof shell 1, and multiple sets of protrusions 5 arranged at the bottom of the inner side of the waterproof shell 1. A connecting and ventilating mechanism is installed on the waterproof shell 1 and the waterproof cover 3. The connecting and ventilating mechanism includes a snap-fit ​​component and a ventilating and waterproof component. The snap-fit ​​component is used to lock or unlock the position of the waterproof cover 3, and the ventilating and waterproof component is used to increase the heat dissipation effect and prevent moisture from entering. The structure is simple and easy to operate, avoiding deformation and damage to the connecting parts caused by forceful bending when disassembling and assembling the waterproof cover 3, reducing the damage to the parts when disassembling and assembling the parts, and further improving the practicality of the structure.

[0028] In this embodiment, the snap-fit ​​assembly includes a pressure block 7 installed on one side of the bottom of the waterproof cover 3. A pressure groove is provided on the top of the waterproof shell 1. The pressure block 7 is slidably connected to the pressure groove. Movable grooves are provided on both sides of the pressure groove inside the waterproof shell 1. Movable plates 8 are slidably connected to the inner side of the movable grooves. A first spring 9 is installed between the two ends of one side of the movable plate 8 and the inner wall of the movable groove. The waterproof cover 3 can be overlapped on the surface of the rubber pad 18, so that the pressure block 7 enters the inner side of the pressure groove through the through hole and presses the waterproof cover 3 down slightly, so that the pressure block 7 moves continuously towards the inner side of the pressure groove.

[0029] Secondly, in this embodiment, the inner sides of the movable groove and the pressure groove are connected. The cross-section of the movable plate 8 is L-shaped, and the cross-section of the pressure block 7 is T-shaped. The opposite ends of the two sets of movable plates 8 and pressure blocks 7 are provided with mutually fitting inclined surfaces 10. A rubber pad 18 is embedded in the top of the waterproof shell 1. The inside of the rubber pad 18 is provided with a through hole corresponding to the pressure groove. The pressure block 7 is slidably connected to the through hole. The two ends of the pressure block 7 abut against the protruding ends of the movable plate 8. With the cooperation of multiple sets of inclined surfaces 10, the movable plate 8 is forced to compress the two sets of first springs 9 to retract. After the pressure block 7 is fully pushed into the inner wall of the pressure groove, the two sets of movable plates 8 are no longer obstructed and are driven to pop out by the first springs 9, abutting against the two protruding ends of the pressure block 7 to complete the locking of the waterproof cover 3.

[0030] Furthermore, in this embodiment, a pull rod 11 is installed on one side of the movable plate 8 between the two sets of first springs 9. A sliding groove is provided on one side of the outer wall of the waterproof shell 1. Both ends of the inner wall of the sliding groove are provided with drag grooves 6. The other end of the inner side of the drag groove 6 is connected to the inner side of the movable groove. The pull rod 11 is slidably connected to the drag groove 6. A sliding plate 12 is installed on one end of the pull rod 11 that extends to the inner side of the sliding groove. When the waterproof cover 3 is removed to maintain and inspect the circuit board body 2, it is only necessary to hold the pull groove 13 on the two sets of sliding plates 12 and slide it inside the sliding groove. At the same time, the pull rod 11 can be moved inside the drag groove 6, and the movable plate 8 can be actively brought into the inner side of the movable groove.

[0031] Furthermore, in this embodiment, one side of the sliding plate 12 is provided with a snap-pull groove 13, and the sliding plate 12 and the sliding groove are slidably connected. The opposite ends of the two sets of sliding plates 12 are each embedded with a first fixing member 14, and the two ends of the inner wall of the sliding groove are each embedded with a second fixing member 15 corresponding to the first fixing member 14. One of the first fixing member 14 and the second fixing member 15 is a first magnet, and the other of the first fixing member 14 and the second fixing member 15 is a second magnet. The magnetic poles of the first magnet and the second magnet are opposite and attract each other. After the sliding plate 12 contacts the inner wall of the sliding groove, the first fixing member 14 and the second fixing member 15 are attracted and temporarily positioned. At this time, the waterproof cover 3 can be removed. After removal, the sliding plate 12 can be reset to the center, and then the circuit board body 2 can be inspected and maintained.

[0032] Furthermore, in this embodiment, the breathable and waterproof component includes multiple ventilation slots 16 formed inside the protrusion 5 and the waterproof shell 1. The side cross-section of the ventilation slot 16 is cross-shaped. Waterproof and breathable membranes 17 are installed at both ends of the ventilation slot 16 and on the inner side of the heat dissipation slot 4. The waterproof and breathable membrane 17 is a TPU waterproof and breathable film. The waterproof and breathable membrane 17 can block external moisture from entering the inner side of the waterproof shell 1 while ensuring air circulation inside the waterproof shell 1. The ventilation slots 16 and heat dissipation slots 4 allow external airflow to enter and internal heat to dissipate, improving the overall heat dissipation effect.

[0033] When using a waterproof FPC flexible printed circuit board according to this solution, the waterproof cover 3 can be overlapped on the surface of the rubber pad 18, allowing the pressure block 7 to enter the inner side of the pressure groove through the through hole. Slightly press the waterproof cover 3 downwards, causing the pressure block 7 to move continuously towards the inner side of the pressure groove. The two ends of the pressure block 7 abut against the protruding ends of the movable plate 8. Multiple sets of inclined surfaces 10 force the movable plate 8 to compress the two sets of first springs 9 and retract. After the pressure block 7 is fully pushed into the inner wall of the pressure groove, the two sets of movable plates 8 are no longer obstructed and are ejected by the first springs 9, abutting against the protruding ends on both sides of the pressure block 7 to lock the waterproof cover 3. To remove the waterproof cover 3 for maintenance and inspection of the circuit board body 2, simply fasten the clips on the two sets of sliding plates 12. The pull groove 13 slides inside the sliding groove, which simultaneously drives the pull rod 11 to move inside the drag groove 6, actively bringing the movable plate 8 into the movable groove. After the sliding plate 12 contacts the inner wall of the sliding groove, the first fixing member 14 and the second fixing member 15 adsorb and temporarily position it. At this time, the waterproof cover 3 can be removed. After removal, the sliding plate 12 can be reset to the center. Then, the circuit board body 2 can be inspected and maintained. The waterproof and breathable membrane 17 can block external moisture from entering the inside of the waterproof shell 1 while ensuring air circulation inside the waterproof shell 1. The ventilation groove 16 and heat dissipation groove 4 allow external airflow to enter and internal heat to dissipate, improving the overall heat dissipation effect.

[0034] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A waterproof FPC flexible printed circuit board comprising a waterproof shell (1), characterized in that: The inner side of the waterproof shell (1) is provided with a circuit board body (2), the top end of the waterproof shell (1) is provided with a waterproof cover (3), both ends of the outer wall of the waterproof shell (1) are provided with heat dissipation grooves (4), the bottom end of the inner side of the waterproof shell (1) is arranged with a plurality of groups of protrusions (5), and the waterproof shell (1) and the waterproof cover (3) are provided with a connecting ventilation mechanism.

2. The waterproof FPC flexible printed circuit board according to claim 1, characterized in that: The connecting ventilation mechanism comprises a clamping assembly and a waterproof ventilation assembly, the clamping assembly is used for locking or unlocking the position of the waterproof cover (3), and the waterproof ventilation assembly is used for increasing the heat dissipation effect and preventing water from entering.

3. The waterproof FPC flexible printed circuit board according to claim 2, characterized in that: The clamping assembly comprises a pressing block (7) arranged on one side of the bottom end of the waterproof cover (3), the top of the waterproof shell (1) is provided with a pressing groove, the pressing block (7) is in sliding connection with the pressing groove, and the two sides of the pressing groove in the waterproof shell (1) are both provided with a movable slot.

4. The waterproof FPC flexible printed circuit board according to claim 3, characterized in that: The movable slot and the pressing groove are in communication, the cross section of the movable plate (8) is L-shaped, the cross section of the pressing block (7) is T-shaped, the opposite ends of the two groups of movable plates (8) and pressing blocks (7) are both provided with inclined surfaces (10) that are matched with each other, the top end of the waterproof shell (1) is embeddedly provided with a rubber pad (18), the inside of the rubber pad (18) is provided with a through hole corresponding to the pressing groove, and the pressing block (7) is in sliding connection with the through hole.

5. The waterproof FPC flexible printed circuit board according to claim 4, characterized in that: One side of the movable plate (8) is arranged with a pull rod (11) between the two groups of first springs (9), one side of the outer wall of the waterproof shell (1) is provided with a sliding groove, the two ends of the inner wall of the sliding groove are both provided with a sliding groove (6), the other end of the inner side of the sliding groove (6) is in communication with the inner side of the movable slot, the pull rod (11) is in sliding connection with the sliding groove (6), and one end of the pull rod (11) extending to the inner side of the sliding groove is provided with a sliding plate (12).

6. The waterproof FPC flexible printed circuit board according to claim 5, characterized in that: One side of the sliding plate (12) is provided with a buckle slot (13), the sliding plate (12) is in sliding connection with the sliding groove, and the opposite ends of the two groups of sliding plates (12) are both embeddedly provided with first fixing members (14).

7. The waterproof FPC flexible printed circuit board according to claim 6, characterized in that: One of the first fixing member (14) and the second fixing member (15) is a first magnet, the other of the first fixing member (14) and the second fixing member (15) is a second magnet, the magnetic poles of the first magnet and the second magnet are opposite and attract each other. The waterproof ventilation assembly comprises a plurality of groups of ventilation grooves (16) arranged in the protrusions (5) and the inner side of the waterproof shell (1), the side cross section of the ventilation groove (16) is cross-shaped, the two ends of the ventilation groove (16) and the inner side of the heat dissipation groove (4) are both provided with waterproof and breathable membranes (17), and the waterproof and breathable membranes (17) are TPU waterproof and breathable membranes.

Images