Corrosion-resistant printed circuit board

Abstract

The utility model belongs to the technical field of printed circuit boards, and particularly relates to a corrosion-resistant printed circuit board, which comprises a printed circuit board body, two protective plates II arranged at the top of the printed circuit board body, and a fixing block II and a fixing block I respectively inserted and mounted on two sides of each protective plate II, protection plates I are inserted between the fixed blocks I and the fixed blocks II; the bottoms of the fixed blocks I and the fixed blocks II are in contact with the top of the printed circuit board body; the four through holes are formed in the printed circuit board body and located in the bottoms of the two first fixing blocks and the bottoms of the two second fixing blocks respectively, limiting grooves are formed in the first fixing blocks and the second fixing blocks, and sliding columns are installed in the limiting grooves in an inserted mode; when the whole device is used, two printed circuit board bodies can be stacked up and down, so that a plurality of printed circuit board bodies can be conveyed in a single process, and meanwhile, the printed circuit board bodies can be protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of printed circuit boards, and in particular relates to a corrosion-resistant printed circuit board. Background Art

[0002] Corrosion-resistant printed circuit boards are specially designed printed circuit boards (PCBs) that are resistant to corrosion. They are widely used in many fields, especially in equipment that needs to operate in corrosive environments for a long time, such as chemical, marine, medical and other fields. By using corrosion-resistant printed circuit boards, these devices can operate more stably and reliably, extend their service life and improve their overall performance.

[0003] For example, a Chinese patent with publication number CN204634160U discloses a printed circuit board, wherein the printed circuit board is provided with a plurality of welding parts for welding electronic components, each welding part is provided with a plurality of pads, wherein the plurality of pads of at least one welding part of the plurality of welding parts are connected by solder to replace the zero-ohm resistance element. The printed circuit board of the utility model connects the plurality of pads of at least one welding part on the printed circuit board with solder to replace the zero-ohm resistance element, and there is no need to weld the zero-ohm resistance element on the printed circuit board, thereby reducing the number of components on the printed circuit board, facilitating wiring and saving costs; in addition, during the experiment process of measuring current in the circuit, there is no need to disassemble the components, only the solder needs to be disconnected, and the operation is convenient.

[0004] The above patent has the following problems:

[0005] This patent has some disadvantages when used, such as: the printed circuit board is not convenient to stack during transportation, occupies a large space, reduces the number of single transportation, and the device may be damaged by bumps during transportation. In view of this, we propose a corrosion-resistant printed circuit board. Utility Model Content

[0006] The purpose of the utility model is to provide a corrosion-resistant printed circuit board to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a corrosion-resistant printed circuit board, comprising:

[0008] A printed circuit board body, wherein two protection plates 2 are arranged on the top of the printed circuit board body, and a fixing block 2 and a fixing block 1 are respectively plugged and installed on both sides of the protection plate 2, and a protection plate 1 is plugged and installed between the two fixing blocks 1 and 2, and the bottoms of the fixing blocks 1 and 2 are in contact with the top of the printed circuit board body;

[0009] Four through holes, the four through holes are all provided on the printed circuit board body and are respectively located at the bottom of the two fixed blocks 1 and the two fixed blocks 2, the fixed blocks 1 and 2 are both provided with limiting grooves, the limiting grooves are plugged with sliding columns, the lower ends of the sliding columns pass through the limiting grooves and the corresponding through holes and are fixedly installed with the fixed blocks 3, the sliding columns are plugged with the through holes;

[0010] A limiting assembly, the limiting assembly is located in the two fixing blocks 1 and the two fixing blocks 2, and is used to fix the positions of the four fixing blocks 3;

[0011] Four fixing components are respectively located in four limiting grooves and are respectively used to fix the positions of four sliding columns.

[0012] In the technical scheme, when two printed circuit board bodies need to be stacked and transported, first, two fixing blocks 1 and two fixing blocks 2 are placed on the top of the printed circuit board body, and then four fixing blocks 3 are placed at the bottom of the four through holes respectively, and then the four sliding posts on the top of the four fixing blocks 3 will pass through the four through holes respectively and enter the corresponding limit grooves, and the positions of the sliding posts can be fixed by the set fixing components, and the positions of the four fixing blocks 3, the two fixing blocks 1 and the two fixing blocks 2 are further fixed, and then the two protection plates 1 and the two protection plates 2 will also be fixed on the printed circuit board body, so that the printed circuit board body can be protected, and then one of the printed circuit board bodies is placed on top of the other printed circuit board body, and the two printed circuit board bodies can be stacked up and down by the set limit components;

[0013] When the two printed circuit board bodies need to be disassembled, the personnel first pulls one of the printed circuit board bodies. The two printed circuit board bodies can be separated through the set limit assembly. The two fixed blocks one, two fixed blocks two and four fixed blocks three can be disassembled through the set fixing assembly. At the same time, the two protection plates one and the two protection plates two will be pulled out. The setting of the four through holes can facilitate personnel to install the printed circuit board body on other equipment.

[0014] In the above technical solution, further, the limit assembly includes:

[0015] Four sliding grooves are respectively opened in two fixed blocks one and two fixed blocks two, the sliding grooves are located above the limiting grooves, a fleece-surface Velcro is fixedly installed in the sliding grooves, a thorn-surface Velcro is fixedly installed at the bottom of the fixed block three, and the thorn-surface Velcro is bonded with the fleece-surface Velcro.

[0016] In the technical solution, one of the printed circuit board bodies is placed on top of the other printed circuit board body, and the four fixing blocks at the bottom of one of the printed circuit board bodies are respectively inserted into the plurality of sliding grooves at the top of the other printed circuit board body, and finally the four thorn-surface Velcros on one of the printed circuit board bodies are bonded to the four fleece-surface Velcros on the other printed circuit board body, so that the two printed circuit board bodies can be stacked up and down;

[0017] When the two printed circuit board bodies need to be disassembled, the personnel first pull one of the printed circuit board bodies, and then the four thorn-surface Velcros on one of the printed circuit board bodies are separated from the four fleece-surface Velcros on the other printed circuit board body.

[0018] In the above technical solution, further, the fixing assembly includes:

[0019] Two limit bars, both of which are slidably installed in the limit grooves, and the sides of the two limit bars that are away from each other are fixedly installed with a plurality of springs fixed to the limit grooves, and the sides of the two limit bars that are close to each other extend into the sliding column, and the sides of the two limit bars that are close to each other are plugged into the sliding column, and one end of the limit bar passes through the limit groove and extends to the outside.

[0020] In the technical scheme, when it is necessary to stack and transport two printed circuit board bodies, first, the two fixing blocks 1 and the two fixing blocks 2 are placed on the top of the printed circuit board bodies, and then the four fixing blocks 3 are placed at the bottom of the four through holes respectively, and then the four sliding posts on the top of the four fixing blocks 3 will pass through the four through holes respectively and enter the corresponding limiting grooves, and then the upper ends of the sliding posts will squeeze the inclined surfaces on the corresponding two limiting strips, so that the two limiting strips slide and move away from each other, and at the same time, a number of springs are squeezed and contracted, and when the sliding posts are moved to a suitable position, the sliding posts no longer squeeze the corresponding two limiting strips. At this time, under the action of the rebound force of the several springs, the corresponding two limiting strips slide and move closer to each other, and then the two limiting strips are inserted into the corresponding sliding posts, which can fix the position of the sliding posts, and further fix the positions of the four fixing blocks 3, the two fixing blocks 1 and the two fixing blocks 2;

[0021] Pull the two adjacent limit bars to slide and move away from each other, and at the same time, several springs are squeezed and contracted. When the two limit bars are no longer in the corresponding sliding columns, the fixed block three can be pulled downward. When the fixed block three slides downward, the corresponding sliding column will be disengaged from the corresponding limit groove and the corresponding through hole. Finally, the two fixed blocks one, the two fixed blocks two and the four fixed blocks three can be disassembled. At the same time, the setting of the four through holes can facilitate personnel to install the printed circuit board body on other equipment.

[0022] In the above technical solution, further, the top of the fixing block three is in close contact with the bottom of the printed circuit board body.

[0023] In this technical solution, the stability of the printed circuit boards when they are stacked is ensured.

[0024] In the above technical solution, further, the bottoms of the protection plate 1 and the protection plate 2 are in close contact with the top of the printed circuit board body, and the top heights of the protection plate 1 and the protection plate 2 are greater than the top height of the printed circuit board body.

[0025] In this technical solution, it is ensured that the protection plate 1 and the protection plate 2 can protect the printed circuit board body.

[0026] In the above technical solution, further, the fixing block three is sleeve-fitted with the sliding groove.

[0027] In this technical solution, it is ensured that the fixing block three will not shake in the sliding groove, and it is ensured that the two printed circuit board bodies will not shake during transportation.

[0028] The beneficial effects of the utility model are:

[0029] 1. The corrosion-resistant printed circuit board first places two fixing blocks 1 and two fixing blocks 2 on the top of the printed circuit board body, and then places four fixing blocks 3 at the bottom of four through holes respectively, and then four sliding posts on the top of the four fixing blocks 3 respectively pass through the four through holes and enter the corresponding limiting grooves, and the positions of the sliding posts can be fixed by the set fixing components, and the positions of the four fixing blocks 3, the two fixing blocks 1 and the two fixing blocks 2 are further fixed, and then one of the printed circuit board bodies is placed on the top of the other printed circuit board body, and the two printed circuit board bodies can be stacked up and down by the set limiting components, so that multiple printed circuit board bodies can be transported in a single process.

[0030] 2. The corrosion-resistant printed circuit board can protect the printed circuit board body by providing two protection plates 1 and two protection plates 2 to avoid damage caused by bumps during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0032] Figure 2 It is a schematic diagram of the structure of the main area of ​​the printed circuit board of the utility model;

[0033] Figure 3 It is a schematic diagram of the partial explosion structure of the utility model;

[0034] Figure 4It is a schematic diagram of the through hole structure of the utility model;

[0035] Figure 5 It is a cross-sectional structural diagram of a fixing block of the utility model;

[0036] Figure 6 It is a schematic diagram of the limit strip area structure of the utility model.

[0037] The symbols in the figure are:

[0038] 1. Printed circuit board body; 2. Fixed block 1; 3. Fixed block 2; 4. Protective plate 1; 5. Protective plate 2; 6. Sliding groove; 7. Through hole; 8. Limiting groove; 9. Sliding column; 10. Fixed block 3; 11. Velcro; 12. Velcro; 13. Limiting strip; 14. Spring. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0040] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0042] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0043] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0044] Embodiment 1:

[0045] See also Figure 1 - Figure 6 As shown, this embodiment provides a corrosion-resistant printed circuit board, including:

[0046] A printed circuit board body 1, two protection plates 2 5 are arranged on the top of the printed circuit board body 1, and a fixing block 2 3 and a fixing block 1 2 are respectively plugged and installed on both sides of the protection plate 2 5, and a protection plate 1 4 is plugged and installed between the two fixing blocks 1 2 and the fixing blocks 2 3, and the bottoms of the fixing blocks 1 2 and the fixing blocks 2 3 are in contact with the top of the printed circuit board body 1;

[0047] Four through holes 7, all of which are provided on the printed circuit board body 1 and are respectively located at the bottom of the two fixed blocks 1 2 and the two fixed blocks 2 3, and the fixed blocks 1 2 and 2 3 are provided with limit slots 8, and a sliding column 9 is inserted and installed in the limit slot 8, and the lower end of the sliding column 9 passes through the limit slot 8 and the corresponding through hole 7 and is fixedly installed with a fixed block 3 10, and the sliding column 9 is plugged and matched with the through hole 7;

[0048] A limit assembly, which is located inside the two fixing blocks 1 2 and the two fixing blocks 2 3 and is used to fix the positions of the four fixing blocks 3 10;

[0049] Four fixing components are respectively located in the four limiting grooves 8 and are used to fix the positions of the four sliding columns 9 respectively.

[0050] Among them, when it is necessary to stack and transport two printed circuit board bodies 1, first, two fixing blocks 1 2 and two fixing blocks 2 3 are placed on the top of the printed circuit board body 1, and then four fixing blocks 3 10 are placed at the bottom of the four through holes 7 respectively, and then the four sliding columns 9 on the top of the four fixing blocks 3 10 will pass through the four through holes 7 respectively and enter the corresponding limiting grooves 8. The positions of the sliding columns 9 can be fixed by the set fixing components, and the positions of the four fixing blocks 3 10, the two fixing blocks 1 2 and the two fixing blocks 2 3 are further fixed. Then, two protection plates 1 4 and two protection plates 2 5 will also be fixed on the printed circuit board body 1, so as to protect the printed circuit board body 1, and then one of the printed circuit board bodies 1 is placed on the top of the other printed circuit board body 1, and the two printed circuit board bodies 1 can be stacked up and down by the set limiting components;

[0051] When the two printed circuit board bodies 1 need to be disassembled, the personnel first pulls one of the printed circuit board bodies 1. The two printed circuit board bodies 1 can be separated by the set limit assembly. The two fixed blocks 1 2, the two fixed blocks 2 3 and the four fixed blocks 3 10 can be disassembled by the set fixing assembly. At the same time, the two protective plates 1 4 and the two protective plates 2 5 will be pulled out. The setting of the four through holes 7 can facilitate personnel to install the printed circuit board body 1 on other equipment.

[0052] In this embodiment, the limit assembly includes:

[0053] Four sliding grooves 6, the four sliding grooves 6 are respectively arranged in two fixed blocks 1 2 and two fixed blocks 2 3, the sliding grooves 6 are located above the limiting grooves 8, a fleece-surface Velcro 11 is fixedly installed in the sliding grooves 6, a thorn-surface Velcro 12 is fixedly installed at the bottom of the fixed block 3 10, and the thorn-surface Velcro 12 is bonded and matched with the fleece-surface Velcro 11;

[0054] Among them, one of the printed circuit board bodies 1 is placed on top of the other printed circuit board body 1, and the four fixing blocks 10 at the bottom of one of the printed circuit board bodies 1 are respectively inserted into the plurality of sliding grooves 6 at the top of the other printed circuit board body 1, and finally the four thorn-surface Velcro 12 on one of the printed circuit board bodies 1 are bonded with the four fleece-surface Velcro 11 on the other printed circuit board body 1, so that the two printed circuit board bodies 1 can be stacked up and down;

[0055] When the two printed circuit board bodies 1 need to be disassembled, the personnel first pull one of the printed circuit board bodies 1, and then the four thorn-surface Velcros 12 on one of the printed circuit board bodies 1 are separated from the four fleece-surface Velcros 11 on the other printed circuit board body 1.

[0056] In this embodiment, the fixing component includes:

[0057] Two limit strips 13, both limit strips 13 are slidably installed in the limit groove 8, and a plurality of springs 14 fixed to the limit groove 8 are fixedly installed on the side of the two limit strips 13 away from each other, and the sides of the two limit strips 13 close to each other extend into the sliding column 9, and the sides of the two limit strips 13 close to each other are plugged and matched with the sliding column 9, and one end of the limit strip 13 passes through the limit groove 8 and extends to the outside;

[0058] When the two printed circuit board bodies 1 need to be stacked and transported, first, the two fixing blocks 1 2 and the two fixing blocks 2 3 are placed on the top of the printed circuit board body 1, and then the four fixing blocks 3 10 are placed on the bottom of the four through holes 7 respectively, and then the four sliding posts 9 on the top of the four fixing blocks 3 10 will pass through the four through holes 7 and enter the corresponding limiting grooves 8 respectively, and then the upper ends of the sliding posts 9 will squeeze the inclined surfaces on the corresponding two limiting strips 13, so that the two limiting strips 13 slide and move away from each other, and at the same time, the plurality of springs 14 are squeezed and contracted, and when the sliding posts 9 are displaced to the appropriate position, the sliding posts 9 no longer squeeze the corresponding two limiting strips 13, and at this time, under the action of the rebound force of the plurality of springs 14, the corresponding two limiting strips 13 slide and move closer to each other, and then the two limiting strips 13 are inserted into the corresponding sliding posts 9, so that the position of the sliding posts 9 can be fixed, and further the positions of the four fixing blocks 3 10, the two fixing blocks 1 2 and the two fixing blocks 2 3 are fixed;

[0059] Pull the two adjacent limit bars 13 to slide and move away from each other, and at the same time, the springs 14 are squeezed and contracted. When the two limit bars 13 are no longer in the corresponding sliding columns 9, the fixed block three 10 can be pulled downward. When the fixed block three 10 slides downward, the corresponding sliding column 9 will be disengaged from the corresponding limit groove 8 and the corresponding through hole 7. Finally, the two fixed blocks one 2, the two fixed blocks two 3 and the four fixed blocks three 10 can be disassembled, and the two protection plates one 4 and the two protection plates two 5 will be pulled out. The setting of the four through holes 7 can facilitate personnel to install the printed circuit board body 1 on other equipment.

[0060] Embodiment 2:

[0061] This embodiment provides a corrosion-resistant printed circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0062] In this embodiment, the top of the fixing block 3 10 is in close contact with the bottom of the printed circuit board body 1 .

[0063] In this case, the stability of the printed circuit board body 1 during stacking is ensured.

[0064] Embodiment 3:

[0065] This embodiment provides a corrosion-resistant printed circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] In this embodiment, the bottoms of the protection plates 1 4 and 2 5 are in close contact with the top of the printed circuit board body 1 , and the top heights of the protection plates 1 4 and 2 5 are greater than the top height of the printed circuit board body 1 .

[0067] The protection plate 1 4 and the protection plate 2 5 are guaranteed to protect the printed circuit board body 1 .

[0068] Embodiment 4:

[0069] This embodiment provides a corrosion-resistant printed circuit board, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0070] In this embodiment, the fixing block 3 10 is sleeve-fitted with the sliding groove 6 .

[0071] Here, it is ensured that the fixing block 3 10 will not shake in the sliding groove 6, and it is ensured that the two printed circuit board bodies 1 will not shake during transportation.

[0072] Working principle: When two printed circuit board bodies 1 need to be stacked and transported, first place the two fixing blocks 1 2 and the two fixing blocks 2 3 on the top of the printed circuit board body 1, and then place the four fixing blocks 3 10 at the bottom of the four through holes 7 respectively, and then the four sliding columns 9 on the top of the four fixing blocks 3 10 will pass through the four through holes 7 respectively and enter the corresponding limit grooves 8, and then the upper ends of the sliding columns 9 will squeeze the inclined surfaces on the corresponding two limit strips 13, so that the two limit strips 13 slide and move away from each other, and at the same time, a number of springs 14 are squeezed and contracted. When the sliding columns 9 move to a suitable position, the sliding columns 9 no longer squeeze the corresponding two limit strips 13. At this time, under the action of the rebound force of the several springs 14, the corresponding two limit strips 13 slide and move closer to each other, and then the two limit strips 13 are inserted into the corresponding The position of the sliding column 9 can be fixed in the corresponding sliding column 9, and the positions of the four fixing blocks 3 10, the two fixing blocks 1 2 and the two fixing blocks 2 3 are further fixed. Then, the two protection plates 1 4 and the two protection plates 2 5 are also fixed on the printed circuit board body 1, and the printed circuit board body 1 can be protected. Then, one of the printed circuit board bodies 1 is placed on the top of the other printed circuit board body 1, and the four fixing blocks 3 10 at the bottom of one of the printed circuit board bodies 1 are respectively inserted into the several sliding grooves 6 at the top of the other printed circuit board body 1. Finally, the four thorn-surface Velcro 12 on one of the printed circuit board bodies 1 are bonded with the four fur-surface Velcro 11 on the other printed circuit board body 1, and the two printed circuit board bodies 1 can be stacked up and down;

[0073] When it is necessary to disassemble the two printed circuit board bodies 1, the personnel first pulls one of the printed circuit board bodies 1, and then the four thorn-surface Velcro 12 on one of the printed circuit board bodies 1 are separated from the four fur-surface Velcro 11 on the other printed circuit board body 1, and at the same time, the two protection plates 1 4 and the two protection plates 2 5 are pulled out, and then the two adjacent limit strips 13 are pulled to slide and move away from each other, and at the same time, a number of springs 14 are squeezed and contracted. When the two limit strips 13 are no longer in the corresponding sliding columns 9, the fixed block three 10 can be pulled downward, and when the fixed block three 10 slides downward, the corresponding sliding column 9 will be disengaged from the corresponding limit groove 8 and the corresponding through hole 7, and finally the two fixed blocks one 2, the two fixed blocks two 3 and the four fixed blocks three 10 can be disassembled. At the same time, the setting of the four through holes 7 can facilitate personnel to install the printed circuit board body 1 on other equipment.

[0074] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A corrosion-resistant printed circuit board, characterized in that: include: A printed circuit board body (1), wherein two protection plates (2) are arranged on the top of the printed circuit board body (1), and a fixing block (3) and a fixing block (2) are fixedly installed on both sides of the protection plate (5), and a protection plate (4) is fixedly installed between the two fixing blocks (2) and the two fixing blocks (3), and the bottoms of the fixing blocks (2) and the two fixing blocks (3) are in contact with the top of the printed circuit board body (1); Four through holes (7), the four through holes (7) are all provided on the printed circuit board body (1) and are respectively located at the bottom of the two fixed blocks (2) and the two fixed blocks (3), the fixed blocks (2) and the fixed blocks (3) are both provided with limit slots (8), a sliding column (9) is inserted and installed in the limit slots (8), the lower end of the sliding column (9) passes through the limit slots (8) and the corresponding through holes (7) and is fixedly installed with a fixed block (10), the sliding column (9) is inserted and matched with the through holes (7); A limit assembly, the limit assembly is located in the two fixing blocks 1 (2) and the two fixing blocks 2 (3), and is used to fix the positions of the four fixing blocks 3 (10); Four fixing components are respectively located in four limiting grooves (8) and are respectively used to fix the positions of four sliding columns (9).

2. A corrosion-resistant printed circuit board according to claim 1, characterized in that: The limiting component comprises: Four sliding grooves (6), the four sliding grooves (6) are respectively arranged in two fixed blocks one (2) and two fixed blocks two (3), the sliding grooves (6) are located above the limiting grooves (8), a fleece-surface Velcro (11) is fixedly installed in the sliding grooves (6), a thorn-surface Velcro (12) is fixedly installed at the bottom of the fixed block three (10), and the thorn-surface Velcro (12) is bonded to the fleece-surface Velcro (11).

3. A corrosion-resistant printed circuit board according to claim 2, characterized in that: The fixing assembly comprises: Two limit strips (13), both limit strips (13) are slidably installed in the limit slot (8), and a plurality of springs (14) fixed to the limit slot (8) are fixedly installed on the sides of the two limit strips (13) away from each other, and the sides of the two limit strips (13) close to each other extend into the sliding column (9), and the sides of the two limit strips (13) close to each other are plugged into the sliding column (9), and one end of the limit strip (13) passes through the limit slot (8) and extends to the outside.

4. The corrosion-resistant printed circuit board according to claim 1, characterized in that: The top of the fixing block three (10) is in close contact with the bottom of the printed circuit board body (1).

5. The corrosion-resistant printed circuit board according to claim 1, characterized in that: The bottoms of the protection plate 1 (4) and the protection plate 2 (5) are in close contact with the top of the printed circuit board body (1), and the top heights of the protection plate 1 (4) and the protection plate 2 (5) are greater than the top height of the printed circuit board body (1).

6. The corrosion-resistant printed circuit board according to claim 1, characterized in that: The fixing block three (10) is sleeve-fitted with the sliding groove (6).

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