Flame-retardant PCB (printed circuit board) structure

Abstract

The utility model relates to the technical field of PCBs (printed circuit boards), and provides a flame-retardant PCB structure which comprises a shell, a PCB body is arranged on the inner bottom wall of the shell, a hot aerosol component is arranged on the inner side wall of the shell, and a temperature sensor is arranged on the inner side wall of the shell. A limiting groove is formed in the inner top wall of the shell, and the inner wall of the limiting groove is slidably connected with a fire retardant plate. Air in a piston cylinder is heated and expanded to extrude a piston head to move downwards, a clamping rod is moved out of a clamping groove, and therefore under the action of a reset spring, a sliding block drives a fire retardant plate to move on a sliding rod, the fire retardant plate moves to a heat dissipation opening in a limiting groove, the external air temperature is isolated, and under the action of a temperature sensor and a hot aerosol assembly, the fire retardant plate moves to the heat dissipation opening. And fire extinguishing gas is generated to extinguish fire in the shell, so that the PCB body is prevented from being damaged, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB plates, and in particular to a flame-retardant PCB plate structure. Background Art

[0002] Printed circuit boards, also known as printed circuit boards, are providers of electrical connections for electronic components. According to the number of layers of the circuit board, they can be divided into single-layer, double-layer, four-layer, six-layer and other multi-layer circuit boards. Printed circuit boards have developed from single-layer to double-layer, multi-layer and flexible boards, and are constantly developing towards high precision, high density and high reliability, constantly reducing size, reducing costs and improving performance, so that printed circuit boards will still maintain strong vitality in the development of future electronic products. The future development trend of printed circuit board production and manufacturing technology is to develop in the direction of high density, high precision, fine aperture, fine wire, small spacing, high reliability, multi-layer, high-speed transmission, light weight and thinness in terms of performance.

[0003] After searching, Chinese patent number CN213186703U discloses a PCB board with a fireproof structure, which relates to the field of PCB protection technology. The PCB board with a fireproof structure includes a board body, the board body is fixedly installed inside the heat-insulating shell, the top of the heat-insulating shell is provided with a ventilation hole, and a fixed long rod is fixedly installed inside the heat-insulating shell through a fixed block, and the fixed block is hinged with the top of the heat-insulating board 1. The PCB board with a fireproof structure, the ventilation hole can play an auxiliary heat dissipation effect on the board body under normal conditions, when the device equipped with the PCB catches fire, the positioning rod automatically detaches from the movable plate, and the two movable plates move toward each other under the action of the driving spring, and the heat-insulating board 1, the heat-insulating board 2, the heat-insulating board 3 and the heat-insulating board 4 will open under the action of the movable plate, the movable cover 1 and the movable cover 2, thereby protecting the top of the board body and preventing the board body from burning, thereby preventing the board body from burning and damaging without affecting the heat dissipation of the board body, and reducing the use cost of the PCB.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned PCB board with a fireproof structure has the following problems: the above-mentioned scheme uses the positioning rod to automatically detach from the movable plate, and the two movable plates move toward each other under the action of the driving spring. The heat insulation board 1, the heat insulation board 2, the heat insulation board 3 and the heat insulation board 4 will open under the action of the movable plate, the movable sleeve 1 and the movable sleeve 2, thereby protecting the top of the board body to prevent the board body from burning. However, in actual use, the heat insulation board only provides protection for a short period of time. When the temperature is high, the heat is transferred to the PCB body through the heat insulation board, which will affect the operation of the PCB body and cause the PCB to be damaged by heat. Utility Model Content

[0005] The utility model provides a flame-retardant PCB plate structure, which solves the problem in the related art that in actual use, the heat insulation board only provides protection for a short period of time, and when the temperature is high, the heat is transferred to the PCB body through the heat insulation board, which will affect the operation of the PCB body and cause the PCB to be damaged by heat.

[0006] The technical solution of the utility model is as follows: a flame-retardant PCB plate structure, comprising a shell, the inner bottom wall of the shell is provided with a PCB plate body, the inner side wall of the shell is provided with a hot aerosol component, and the inner side wall of the shell is provided with a temperature sensor;

[0007] The inner top wall of the shell is provided with a limiting groove, the inner wall of the limiting groove is slidably connected with a fire blocking plate, the bottom of the fire blocking plate is fixedly connected with a slider, the inner wall of the shell is fixedly connected with a slide rod, and the outer side wall of the slide rod is sleeved with a return spring;

[0008] The inner side wall of the shell is fixedly connected with a mounting plate, the bottom of the mounting plate is provided with a placement groove, the interior of the placement groove is provided with a clamping mechanism, and the inner top wall of the limiting groove is provided with a heat dissipation port.

[0009] Preferably, the clamping mechanism includes a piston cylinder fixedly mounted on the top wall of the placement groove, a piston head slidably connected to the inner wall of the piston cylinder, a guide column fixedly connected to the inner bottom wall of the piston head, a connecting plate fixedly connected to the bottom end of the guide column, and a clamping rod fixedly mounted on the top of the connecting plate.

[0010] Preferably, the top end of the clamping rod passes through the mounting plate, and the bottom of the sliding block is provided with a clamping groove, and the clamping groove is clamped with the clamping rod.

[0011] Preferably, the hot aerosol component is electrically connected to the temperature sensor, and the PCB board body is detachably connected to the shell.

[0012] Preferably, the sliding rod is slidably connected to the sliding block, and the outer side wall of the sliding rod is fixedly connected to a limiting block.

[0013] Preferably, a mounting frame is fixedly mounted on the top of the shell, and a micro heat dissipation fan is arranged inside the mounting frame.

[0014] Preferably, the fire-blocking plate matches the heat dissipation port, and the micro heat dissipation fan matches the heat dissipation port.

[0015] Preferably, a plurality of mounting blocks are fixedly connected to both sides of the shell, and a plurality of mounting blocks are each provided with mounting holes on top.

[0016] The working principle and beneficial effects of the utility model are:

[0017] In the utility model, the air in the piston cylinder expands due to heat and squeezes the piston head to move downward, so that the clamping rod moves out of the clamping groove. Therefore, under the action of the reset spring, the slider drives the fire-blocking plate to move on the slider, and the fire-blocking plate moves to the heat dissipation port in the limit groove to isolate the outside air temperature. Under the action of the temperature sensor and the hot aerosol component, fire-extinguishing gas is generated to extinguish the fire inside the shell, thereby preventing the PCB plate body from being damaged and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0020] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the clamping mechanism of the utility model;

[0023] In the figure: 1. Shell; 2. PCB board body; 3. Hot aerosol component; 4. Temperature sensor; 5. Limiting groove; 6. Fire barrier; 7. Sliding block; 8. Sliding rod; 9. Reset spring; 10. Mounting plate; 11. Placement groove; 12. Clamping mechanism; 121. Piston cylinder; 122. Piston head; 123. Guide column; 124. Connecting plate; 125. Clamping rod; 13. Heat dissipation port; 14. Clamping groove; 15. Limiting block; 16. Mounting frame; 17. Micro cooling fan; 18. Mounting block; 19. Mounting hole. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 - Figure 4The utility model provides the following technical solution: a flame-retardant PCB board structure: comprising a shell 1, the inner bottom wall of the shell 1 is provided with a PCB board body 2, the inner side wall of the shell 1 is provided with a hot aerosol component 3, and the inner side wall of the shell 1 is provided with a temperature sensor 4;

[0026] The inner top wall of the housing 1 is provided with a limit groove 5, the inner wall of the limit groove 5 is slidably connected with a fire-blocking plate 6, the bottom of the fire-blocking plate 6 is fixedly connected with a slider 7, the inner wall of the housing 1 is fixedly connected with a slide bar 8, and the outer side wall of the slide bar 8 is sleeved with a return spring 9;

[0027] The inner wall of the housing 1 is fixedly connected with a mounting plate 10 , a placement groove 11 is provided at the bottom of the mounting plate 10 , a clamping mechanism 12 is provided inside the placement groove 11 , and a heat dissipation port 13 is provided on the inner top wall of the limiting groove 5 .

[0028] During use, when a fire occurs, the gas inside the piston cylinder 121 expands due to the heat, pushing the piston head 122 to move downward. Under the action of the piston head 122, the guide column 123 drives the connecting plate 124 to move downward, so that the clamping rod 125 is moved out of the clamping groove 14, so that the slider 7 drives the fire barrier plate 6 to block the heat dissipation port 13 under the action of the return spring 9, and extinguishes the fire and cools down the inside of the shell 1 under the action of the temperature sensor 4 and the hot aerosol component 3.

[0029] Specifically, the clamping mechanism 12 includes a piston cylinder 121 fixedly mounted on the inner top wall of the placement groove 11, a piston head 122 slidably connected to the inner wall of the piston cylinder 121, a guide column 123 fixedly connected to the inner bottom wall of the piston head 122, a connecting plate 124 fixedly connected to the bottom end of the guide column 123, and a clamping rod 125 fixedly mounted on the top of the connecting plate 124. The top end of the clamping rod 125 passes through the mounting plate 10, and a clamping groove 14 is provided at the bottom of the slider 7, and the clamping groove 14 and the clamping rod 125 are clamped together.

[0030] The card slot 14 is connected with the card rod 125 to limit the slider 7, thereby limiting the fire-blocking plate 6. The gas inside the piston cylinder 121 expands due to heat and squeezes the piston head 122 to move downward. Under the conduction of the guide column 123 and the connecting plate 124, the card rod 125 can be moved out of the card slot 14.

[0031] Specifically, the hot aerosol component 3 is electrically connected to the temperature sensor 4, and the PCB board body 2 is detachably connected to the housing 1.

[0032] The temperature sensor 4 and the hot aerosol assembly 3 are mainly used to release fire extinguishing gas.

[0033] Specifically, the slide rod 8 is slidably connected to the slide block 7 , and the outer side wall of the slide rod 8 is fixedly connected to the limiting block 15 .

[0034] The limiting block 15 is used to limit the sliding block 7 .

[0035] Specifically, a mounting frame 16 is fixedly mounted on the top of the housing 1 , and a micro heat dissipation fan 17 is disposed inside the mounting frame 16 .

[0036] The micro cooling fan 17 can increase the heat dissipation effect of the PCB board body 2 when in use, ensuring that the performance of the device is not affected.

[0037] Specifically, the fire-blocking plate 6 matches the heat dissipation port 13 , and the micro heat dissipation fan 17 matches the heat dissipation port 13 .

[0038] Specifically, a plurality of mounting blocks 18 are fixedly connected to both sides of the housing 1 , and mounting holes 19 are formed on the tops of the plurality of mounting blocks 18 .

[0039] The installation block 18 and the installation hole 19 are provided to install and fix the housing 1 .

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flame-retardant PCB board structure, comprising a housing (1), characterized in that: The inner bottom wall of the shell (1) is provided with a PCB plate body (2), the inner side wall of the shell (1) is provided with a hot aerosol component (3), and the inner side wall of the shell (1) is provided with a temperature sensor (4); The inner top wall of the shell (1) is provided with a limit groove (5), the inner wall of the limit groove (5) is slidably connected with a fire blocking plate (6), the bottom of the fire blocking plate (6) is fixedly connected with a slider (7), the inner wall of the shell (1) is fixedly connected with a slide rod (8), and the outer side wall of the slide rod (8) is sleeved with a return spring (9); The inner side wall of the shell (1) is fixedly connected with a mounting plate (10), the bottom of the mounting plate (10) is provided with a placement groove (11), the interior of the placement groove (11) is provided with a clamping mechanism (12), and the inner top wall of the limiting groove (5) is provided with a heat dissipation port (13).

2. The flame-retardant PCB board structure according to claim 1, characterized in that: The clamping mechanism (12) comprises a piston cylinder (121) fixedly mounted on the inner top wall of the placement groove (11), a piston head (122) slidably connected to the inner wall of the piston cylinder (121), a guide column (123) fixedly connected to the inner bottom wall of the piston head (122), a connecting plate (124) fixedly connected to the bottom end of the guide column (123), and a clamping rod (125) fixedly mounted on the top of the connecting plate (124).

3. The flame-retardant PCB board structure according to claim 2, characterized in that: The top end of the clamping rod (125) passes through the mounting plate (10), and the bottom of the sliding block (7) is provided with a clamping groove (14), and the clamping groove (14) is clamped with the clamping rod (125).

4. The flame-retardant PCB board structure according to claim 1, characterized in that: The hot aerosol component (3) is electrically connected to the temperature sensor (4), and the PCB board body (2) is detachably connected to the housing (1).

5. The flame-retardant PCB board structure according to claim 1, characterized in that: The sliding rod (8) is slidably connected to the sliding block (7), and the outer side wall of the sliding rod (8) is fixedly connected to a limiting block (15).

6. The flame-retardant PCB board structure according to claim 1, characterized in that: A mounting frame (16) is fixedly mounted on the top of the housing (1), and a micro heat dissipation fan (17) is arranged inside the mounting frame (16).

7. The flame-retardant PCB board structure according to claim 6, characterized in that: The fire-blocking plate (6) matches the heat dissipation port (13), and the micro heat dissipation fan (17) matches the heat dissipation port (13).

8. The flame-retardant PCB board structure according to claim 1, characterized in that: A plurality of mounting blocks (18) are fixedly connected to both sides of the shell (1), and mounting holes (19) are provided on the tops of the plurality of mounting blocks (18).

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