Salt spray test device for PCB (Printed Circuit Board)

Abstract

The utility model discloses a salt spray test device for a PCB (Printed Circuit Board), which comprises a test box formed by hinging a main box body and a cover plate, and a clamp mechanism for clamping and fixing the PCB to be tested is arranged in the main box body. The angle adjusting mechanism is composed of a fixing disc, an overturning disc, a pointer, an inclination angle dial and a fixing screw rod and used for adjusting the angle of the clamp mechanism and the whole PCB on the main box body, the fixing disc is fixed to the inner side wall of the main box body, the overturning disc is rotationally arranged on one side of the fixing disc, and the side, facing the fixing disc, of the overturning disc penetrates through the fixing disc; the pointer is arranged on the side wall of one side, penetrating through the fixed disc, of the overturning disc, the dip angle dial is arranged on the side wall, deviating from the overturning disc, of the fixed disc, and the fixed screw penetrates through the fixed disc in a threaded mode; the cover plate is provided with a water removal mechanism which is used for sealing the main box body and blowing away accumulated water on the PCB. According to the utility model, the placement angle of the PCB sample can be conveniently and accurately controlled, accumulated water on the surface of the sample can be removed, the corrosion rate of the test can be controlled, the repeatability is improved, and the corrosion resistance of the PCB can be accurately evaluated.

Description

Technical Field

[0001] The utility model relates to a salt spray test device for PCB boards, belonging to the technical field of salt spray tests. Background Art

[0002] With the increasingly wide application of electronic products in various environments, especially for those electronic devices that need to be used in marine, coastal areas or other high-salt spray environments, the corrosion resistance of printed circuit boards (PCBs for short) in a salt spray environment is particularly important. As an important part of electronic products, the corrosion resistance of PCB boards directly affects the reliability and service life of the entire electronic product.

[0003] A salt spray test is a device for testing the corrosion resistance of products. When a PCB board is subjected to a salt spray test, it is necessary to control its placement angle, and excessive salt water should not accumulate on its surface, otherwise it will affect the corrosion rate and lead to distorted test results.

[0004] Based on the above content, a salt spray test device for PCB boards is proposed to evaluate the corrosion resistance of printed circuit boards (PCBs) in a salt spray environment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a salt spray test device for evaluating the corrosion resistance of PCB boards in a salt spray environment, which can ensure the accuracy of test results and thus improve the reliability and service life of PCB boards.

[0006] To achieve the above technical purpose and reach the above technical effect, the present application is realized through the following technical solutions:

[0007] A salt spray test device for PCB boards includes a test chamber, the test chamber includes a main box body and a cover plate, the cover plate is hinged to the main box body, a fixture mechanism and an angle adjustment mechanism are arranged in the main box body, the fixture mechanism is used for clamping and fixing the PCB board to be tested, and the angle adjustment mechanism is used for adjusting the angle of the fixture mechanism and the PCB board as a whole in the main box body;

[0008] A water removal mechanism is arranged on the cover plate for sealing the main box body and blowing away the accumulated water on the PCB board.

[0009] Preferably, the angle adjustment mechanism includes a fixed plate, a flip plate, a pointer, an inclination dial and a fixed screw, the fixed plate is fixedly connected to the inner wall of the main box body, the flip plate is rotatably arranged on one side of the fixed plate, the flip plate passes through the fixed plate toward the side of the fixed plate, the pointer is arranged on the side wall of the flip plate passing through the fixed plate, the inclination dial is arranged on the side wall of the fixed plate away from the flip plate, at least one fixed screw is provided, the fixed screw thread passes through the fixed plate to move toward or away from the flip plate, and the clamping mechanism is arranged on the side of the flip plate away from the fixed plate.

[0010] Furthermore, the clamping mechanism includes a clamping frame, a screw rod, a wheel and a gasket. The clamping frame is in a "匚" shape, and the sealed side of the clamping frame is fixedly connected to the flip disk. The screw rod is threaded through the top side wall of the clamping frame. The wheel is fixedly sleeved on the outer wall of the end of the screw rod away from the clamping frame, and the gasket is arranged on the end face of the screw rod extending into the clamping frame.

[0011] Furthermore, the angle adjustment mechanism and the clamp mechanism are provided in two corresponding groups, the two groups of angle adjustment mechanisms are symmetrically arranged, and the PCB board is clamped and fixed between the two groups of clamp mechanisms.

[0012] Preferably, the water removal mechanism includes a tip air guide cover, a hanger and a fan, the tip air guide cover is a conical cover body, the tip air guide cover is fixedly connected to the cover plate, the hanger is arranged on the inner wall of the tip air guide cover, the fan is hung on the hanger and is spaced apart from the inner top wall of the tip air guide cover through the hanger, and the fan blows toward the interior of the main box.

[0013] Preferably, at least one glass plate is provided on the peripheral side wall of the main box body.

[0014] The salt spray test device for PCB boards provided by the utility model has the following advantages:

[0015] 1. The utility model provides a salt spray test device for PCB boards. The clamp mechanism clamps and mounts a PCB board. The PCB board under test is located in the main box. The cover is closed to prevent salt spray from overflowing during the salt spray test. The glass plate on the side wall of the main box facilitates observation of the PCB board under test. The clamp mechanism and angle adjustment mechanism are each provided with two groups to clamp and fix the PCB board from both sides. The two sides of the PCB board are placed in the clamp frame. The screw rod is rotated by the wheel to drive the gasket to descend and clamp the PCB board partially. The clamp mechanisms on both sides work together to fix the PCB board, facilitating the subsequent stable salt spray test. The device is compatible with PCB boards of different specifications.

[0016] 2. A salt spray test device for a PCB board provided by the present utility model, wherein the fixture mechanism is fixedly installed on the flipping disk. After the PCB board is fixed on the angle adjustment mechanism through the fixture mechanism, the flipping disk can be rotated to drive the fixture mechanism to rotate, thereby adjusting the placement test angle of the PCB board fixed by the fixture mechanism. Moreover, a pointer is fixedly installed on one side of the flipping disk facing the fixed disk after passing through the fixed disk. The rotation of the flipping disk drives the pointer to rotate synchronously. The pointer can indicate the placement test angle of the PCB board through the inclination scale. The included angle between the placement angle of the PCB board in the test chamber and the vertical plane is 15° to 30°. By controlling the projected area of the test sample on the horizontal plane, the corrosion rate is controlled, so as to obtain a good repeatability of the corrosion resistance performance evaluation. After adjusting to the appropriate angle, by rotating the fixed screw, the fixed screw contacts and frictions one side of the flipping disk to fix the flipping disk, making the fixed placement angle of the PCB board unchangeable for stable testing.

[0017] 3. The present utility model provides a salt spray test device for a PCB board. During the salt spray test, salt solution will accumulate on the surface of the PCB board, affecting the corrosion rate and resulting in distorted test results. The tip deflector is installed on the cover plate of the test chamber. The salt spray liquefies into water droplets on the inner wall of the conical tip deflector and flows along both sides to the bottom of the main chamber, preventing the salt water droplets on the inner wall from falling on the PCB board. And the fan is installed on the tip deflector through a hanger, and there is a space between the top of the tip deflector and the fan. When there is a lot of water accumulated on the PCB board, the fan is turned on to blow the wind towards the PCB board inside the test chamber to disperse the water droplets accumulated on the surface of the PCB board, so that the surface of the PCB board is re-exposed to the salt spray corrosion environment; when there is less water accumulated on the PCB board, the fan remains closed, thus facilitating the accurate control of the sample placement angle and the removal of the water accumulated on the sample surface, being able to control the corrosion rate of the test to improve repeatability, and thereby accurately evaluating the corrosion resistance performance of the PCB board. Description of the Drawings

[0018] Figure 1 Isometric schematic of a salt spray test device for a PCB board of the present utility model Figure 1 ;

[0019] Figure 2 Isometric schematic of a salt spray test device for a PCB board of the present utility model Figure 2 ;

[0020] Figure 3 Is the structural schematic diagram of the angle adjustment mechanism of the utility model;

[0021] Figure 4 Is the structural schematic diagram of the fixture mechanism of the present utility model;

[0022] Figure 5 Is the structural schematic diagram of the water removal mechanism of the present utility model.

[0023] In the figure:

[0024] 1 - Test chamber; 11 - Main box body; 12 - Cover plate; 2 - Angle adjustment mechanism; 21 - Fixed disk; 22 - Rotating disk; 23 - Pointer; 24 - Inclination scale; 25 - Fixed screw; 3 - Clamping mechanism; 31 - Clamping frame; 32 - Lead screw; 33 - Disk; 34 - Spacer; 4 - Dewatering mechanism; 41 - Tip deflector; 42 - Hanger; 43 - Fan; 5 - PCB board; 6 - Glass plate; 7 - Mounting plate. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0026] Refer to Figure 1 and Figure 2 A salt spray test device for a PCB board includes a test chamber 1. The test chamber 1 includes a main box body 11 and a cover plate 12. The cover plate 12 is hinged to the main box body 11. In a feasible embodiment, the main box body 11 can be a box body of any shape. In this embodiment, the main box body 11 is preferably a rectangular box body. A clamping mechanism 3 and an angle adjustment mechanism 2 are installed in the main box body 11. The clamping mechanism 3 is used to clamp and fix the PCB board 5 to be tested, and the angle adjustment mechanism 2 is used to adjust the angle of the clamping mechanism 3 and the PCB board 5 as a whole in the main box body 11, so as to control the corrosion rate by controlling the projected area of the sample on the horizontal plane, thereby obtaining a good repeatability of the corrosion resistance performance evaluation.

[0027] Furthermore, a dewatering mechanism 4 is installed on the cover plate 12. The dewatering mechanism 4 is used to seal the main box body 11, which can prevent salt spray from overflowing during the salt spray test. At the same time, when salt solution accumulates on the PCB board 5, it can blow the accumulated liquid to reduce the possibility that the accumulation of salt solution affects the corrosion rate and causes the test results to be distorted.

[0028] Refer to Figures 1-3, in a further embodiment, the angle adjustment mechanism 2 includes a fixed disk 21, a flipping disk 22, a pointer 23, an inclination scale disk 24 and a fixing screw 25. The fixed disk 21 is fixedly connected to the inner side wall of the main box body 11. In this embodiment, the fixed disk 21 is preferably installed on one side of the long side of the main box body 11. An installation plate 7 for installing the fixed disk 21 is integrally formed in the main box body 11. The fixed disk 21 can be fixed by welding, bonding or integrally injection molding with the main box body 11. The specific fixing method is selected according to the material of the test chamber 1, which is prior art and will not be elaborated here. The flipping disk 22 is rotatably installed on one side of the fixed disk 21. The side of the flipping disk 22 facing the fixed disk 21 penetrates through the fixed disk 21. The pointer 23 is fixedly installed on the side wall of the flipping disk 22 on the side where it penetrates through the fixed disk 21. The inclination scale disk 24 is fixed on the side wall of the fixed disk 21 facing away from the flipping disk 22. At least one fixing screw 25 is installed. The fixing screw 25 threadedly penetrates through the fixed disk 21 to move in a direction close to or away from the flipping disk 22. The fixture mechanism 3 is installed on the side of the flipping disk 22 facing away from the fixed disk 21.

[0029] In a feasible embodiment, the fixed disk 21 and the flipping disk 22 can be disk bodies of any shape. In this embodiment, the fixed disk 21 and the flipping disk 22 are preferably circular disks. A plurality of threaded holes adapted to the fixing screw 25 are evenly spaced in the circumferential direction on the fixed disk 21, which can facilitate the tester to fix the flipping disk 22 with the fixing screw 25 at any threaded hole position, and can also ensure the stability of the fixing of the flipping disk 22 through a plurality of fixing screws 25.

[0030] During the test, the fixture mechanism 3 is fixedly installed on the side of the flipping disk 22 facing away from the fixed disk 21. After the PCB board 5 is fixed on the angle adjustment mechanism 2 through the fixture mechanism 3, by rotating the flipping disk 22, the fixture mechanism 3 can be driven to rotate, so as to adjust the placement test angle of the PCB board 5 fixed by the fixture mechanism 3. At the same time, the rotation of the flipping disk 22 drives the pointer 23 to rotate synchronously. The pointer 23 can indicate the placement test angle of the PCB board 5 through the inclination scale disk 24. The included angle between the placement angle of the PCB board 5 in the test chamber 1 body and the vertical plane is preferably 15° to 30°. By controlling the projected area of the PCB board 5 sample on the horizontal plane, the corrosion rate is controlled, so as to obtain a good repeatability of the corrosion resistance performance evaluation. After adjusting the appropriate angle, by rotating the fixing screw 25, the fixing screw 25 contacts and frictions one side of the flipping disk 22 to fix the flipping disk 22, so that the fixed placement angle of the PCB board 5 cannot be changed, and the test is stable.

[0031] Refer to Figure 2 and Figure 4, in a further embodiment, the fixture mechanism 3 includes a clamping frame 31, a lead screw 32, a wheel disc 33 and a gasket 34. The clamping frame 31 is in a "C" shape. One side of the sealed clamping frame 31 is fixedly connected to the flipping disc 22. In a feasible embodiment, the clamping frame 31 and the flipping disc 22 can be fixed by bolts or adhesively fixed. In this embodiment, the clamping frame 31 and the flipping disc 22 are preferably adhesively fixed. The lead screw 32 is threadedly inserted through the top side wall of the clamping frame 31. The wheel disc 33 is fixedly sleeved on the outer wall of one end of the lead screw 32 away from the clamping frame 31. The gasket 34 is installed on the end face of the end of the lead screw 32 extending into the clamping frame 31. When conducting an experiment, the PCB board 5 to be tested is placed in the clamping frame 31. By rotating the wheel disc 33 to rotate the lead screw 32, the gasket 34 is driven to descend to clamp and fix a part of the PCB board 5.

[0032] Refer to Figure 1 and Figure 2 , in a further embodiment, there are two sets of angle adjustment mechanisms 2 and fixture mechanisms 3 provided correspondingly. The two sets of angle adjustment mechanisms 2 are symmetrically installed on the inner wall of the main box body 11. The PCB board 5 is clamped and fixed between the two sets of fixture mechanisms 3. When installing the PCB board 5 to be tested, the PCB board 5 is clamped and fixed from both sides. The two sides of the PCB board 5 are placed in the clamping frame 31. By rotating the wheel disc 33 to rotate the lead screw 32, the gasket 34 is driven to descend to clamp a part of the PCB board 5. Under the combined action of the fixture mechanisms 3 on both sides, the PCB board 5 is fixed, which is convenient for subsequent stable salt spray testing and compatible with PCB boards 5 of different specifications.

[0033] Refer to Figure 2 and Figure 5 , in a further embodiment, the water removal mechanism 4 includes a tip deflector 41, a hanger 42 and a fan 43. The tip deflector 41 is a conical cover. Specifically, in this embodiment, the tip deflector 41 is preferably a quadrangular pyramid cover adapted to the cover plate 12. The tip deflector 41 is fixedly installed on the cover plate 12 by bolts. The hanger 42 is fixedly installed on the inner wall of the tip deflector 41. The fan 43 is hoisted on the hanger 42 and is spaced at an appropriate distance from the inner top wall of the tip deflector 41 through the hanger 42. The fan 43 blows towards the inside of the main box body 11.

[0034] During the salt spray test, salt solution accumulates on the surface of the PCB board 5, affecting the corrosion rate and causing the test results to be distorted. The tip deflector 41 is installed on the cover plate 12 of the test chamber 1. The salt spray liquefies into water droplets on the inner wall of the tip deflector 41 and flows along both sides to the bottom of the test chamber 1, preventing the salt water droplets on the inner wall from falling on the PCB board 5. The fan 43 is installed on the tip deflector 41 through the hanger 42. There is a space between the top of the tip deflector 41 and the fan 43. When there is a large amount of water accumulation on the PCB board 5, the fan 43 is turned on to blow the wind towards the PCB board 5 inside the test chamber 1, dispersing the water droplets accumulated on the surface of the PCB board 5, so that the surface of the PCB board 5 is re-exposed to the salt spray corrosion environment. When there is less water accumulation on the PCB board 5, the fan 43 remains closed, thus facilitating the accurate control of the sample placement angle and the removal of the water accumulated on the sample surface, enabling the control of the corrosion rate of the test and improving the repeatability, so as to accurately evaluate the corrosion resistance of the PCB board 5.

[0035] Referring to Figure 1 and Figure 2 , in a further embodiment, at least one glass plate 6 is installed on the peripheral side wall of the main box body 11 to facilitate the tester to observe the PCB board 5 during the test, and then timely control the angle adjustment mechanism 2 and the water removal mechanism 4 to perform the angle adjustment and water accumulation dispersion operations of the PCB board 5.

[0036] The above is only the preferred embodiment of the present invention, and it is not a limitation to any form and essence of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the premise of the present invention, several improvements and supplements can still be made, and these improvements and supplements should also be regarded as the protection scope of the present invention. For those skilled in the art, without departing from the spirit and scope of the present invention, any equivalent changes made by using the technical content disclosed above, such as minor modifications, decorations, and evolutions, are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims

1. A salt spray test device for a PCB board, characterized in that, The test box (1) comprises a main box body (11) and a cover plate (12), wherein the cover plate (12) is hinged to the main box body (11), and a clamping mechanism (3) and an angle adjustment mechanism (2) are provided in the main box body (11), wherein the clamping mechanism (3) is used for clamping and fixing a PCB board (5) to be tested, and the angle adjustment mechanism (2) is used for adjusting the angle of the clamping mechanism (3) and the PCB board (5) as a whole in the main box body (11); The cover plate (12) is provided with a water removal mechanism (4) for sealing the main box (11) and blowing away water accumulated on the PCB board (5).

2. The salt spray test device for a PCB board according to claim 1, characterized in that, The angle adjustment mechanism (2) comprises a fixed plate (21), a flip plate (22), a pointer (23), an inclination dial (24) and a fixed screw (25). The fixed plate (21) is fixedly connected to the inner wall of the main box (11). The flip plate (22) is rotatably arranged on one side of the fixed plate (21). The flip plate (22) passes through the fixed plate (21) on the side facing the fixed plate (21). The pointer (23) is arranged on the side wall of the flip plate (22) passing through the fixed plate (21). The inclination dial (24) is arranged on the side wall of the fixed plate (21) away from the flip plate (22). At least one fixed screw (25) is provided. The fixed screw (25) is threadedly passed through the fixed plate (21) to move toward or away from the flip plate (22). The clamp mechanism (3) is arranged on the side of the flip plate (22) away from the fixed plate (21).

3. The salt spray test device for a PCB board according to claim 2, characterized in that, The clamp mechanism (3) comprises a clamp frame (31), a screw rod (32), a wheel disc (33) and a gasket (34); the clamp frame (31) is in a "匚" shape; a sealed side of the clamp frame (31) is fixedly connected to the flip disc (22); the screw rod (32) is threadedly passed through the top side wall of the clamp frame (31); the wheel disc (33) is fixedly sleeved on the outer wall of one end of the screw rod (32) away from the clamp frame (31); and the gasket (34) is arranged on the end surface of the screw rod (32) extending into the clamp frame (31).

4. The salt spray test device for a PCB board according to claim 3, characterized in that, The angle adjustment mechanism (2) and the clamp mechanism (3) are provided in two corresponding groups. The two groups of angle adjustment mechanisms (2) are symmetrically arranged, and the PCB board (5) is clamped and fixed between the two groups of clamp mechanisms (3).

5. The salt spray test device for a PCB board according to claim 1, wherein, The dewatering mechanism (4) comprises a tip air deflector (41), a hanger (42) and a fan (43); the tip air deflector (41) is a conical cover body; the tip air deflector (41) is fixedly connected to the cover plate (12); the hanger (42) is arranged on the inner wall of the tip air deflector (41); the fan (43) is hung on the hanger (42) and is spaced apart from the inner top wall of the tip air deflector (41) through the hanger (42); the fan (43) blows toward the interior of the main box (11).

6. The salt spray test device for a PCB board according to claim 1, characterized in that, At least one glass plate (6) is provided on the peripheral side wall of the main box body (11).

Images