Circuit board protective cover

Abstract

The utility model provides a circuit board protective cover, which relates to the field of semiconductor devices and comprises a fixed cover plate and a movable cover plate, and the fixed cover plate is fixed on one side of a device area of a circuit board. The fixed cover plate and the movable cover plate are provided with hinge devices, the movable cover plate can turn over relative to the fixed cover plate, and when the movable cover plate does not turn over relative to the fixed cover plate, the movable cover plate at least covers the device area and the gold thread area. When the gold thread area operation is involved, the movable cover plate can be turned over to the position above the fixed cover plate, and the gold thread area is exposed for operation; when operation in the gold thread area is not involved, the movable cover plate covers the gold thread area, so that the gold thread area is effectively prevented from being damaged by dust and hand holding. The circuit board protection cover is flexible in design, and can meet the operation requirements of different types of circuit boards.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor devices, specifically to a circuit board protective cover. Background Technology

[0002] Generally, a PCB (Printed Circuit Board) includes a component area and a gold wire area. During PCB manufacturing, operators may touch the gold wire area, causing the gold wire to break. For example, ... Figure 1 The diagram shows the circuit board structure of the Pluto0900 product. Circuit board 001 includes a component area 010 and a gold wire area 011. During the production of the Pluto0900 product, during the stages of WB (Wire Bonding), gold wire inspection, AWB (Auto White Balance) testing, wire sealing with protective adhesive, aluminum substrate bonding, pre-curing testing, post-curing testing, and OQC (Outgoing Quality Control) testing, operators may touch the gold wire area 011 or press on the protective adhesive of the gold wire when handling the product. This could lead to a risk of hidden breakage in the gold wire. This hidden breakage will not be revealed until subsequent testing or use. Hidden breakage in the gold wire reduces the product's connectivity, increases resistance, and may lead to open circuits or short circuits, thus affecting the product's stability and reliability, and increasing the return rate and repair costs. Summary of the Invention

[0003] In view of the problems existing in the prior art described above, this application provides a circuit board protective cover, wherein the circuit board includes a component area and a gold wire area, the protective cover is fixed to the top of the circuit board, and the protective cover includes:

[0004] A fixing cover plate is fixed to one side of the device area of ​​the circuit board;

[0005] A movable cover plate is provided, wherein the fixed cover plate and the movable cover plate are connected by a hinge device, and the movable cover plate is rotatable relative to the fixed cover plate. When the movable cover plate is in an unrotated state relative to the fixed cover plate, the movable cover plate covers at least the device area and the gold wire area.

[0006] Optionally, the movable cover plate rotates along the boundary line between the movable cover plate and the fixed cover plate as the center line.

[0007] Optionally, the side of the fixed cover away from the circuit board is defined as the first top surface, the side of the fixed cover close to the circuit board is defined as the first bottom surface, the side of the movable cover away from the circuit board is defined as the second top surface, and the side of the movable cover close to the circuit board is defined as the second bottom surface. Magnets are provided on the first top surface and the second top surface to ensure that after the movable cover is flipped onto the fixed cover, it can be firmly attached to the fixed cover.

[0008] Optionally, it also includes a correction plate, one end of which is rotatably mounted on the first top surface, and the other end of which presses against or releases the movable cover plate.

[0009] Optionally, the correction plate is located in the middle of the protective cover, the correction plate is a long strip structure, and the portion of the correction plate located on the movable cover plate is greater than or equal to the portion of the correction plate located on the fixed cover plate.

[0010] Optionally, the first top surface and the second top surface are provided with grooves, and the hinge device, the correction pressure plate and the magnet are disposed in the grooves.

[0011] Optionally, the protective cover may include two hinge devices symmetrically arranged about the center line of the cover plate.

[0012] Optionally, the first top surface and the second top surface are provided with grooves, and the hinge device, the correction pressure plate and the magnet are disposed in the grooves.

[0013] Optionally, the thickness of the hinge device, the corrective pressure plate, and the magnet is less than or equal to the thickness of the groove.

[0014] Optionally, the rotation angle of the movable cover is between 0 and 180 degrees, and when the movable cover is rotated 180 degrees, the first top surface and the second top surface are in contact.

[0015] Optionally, the first bottom surface and the second bottom surface are provided with a pad, the pad being located in the area of ​​the device area of ​​the circuit board where no device is disposed.

[0016] As described above, the circuit board protective cover provided by this utility model has at least the following beneficial technical effects: Protection of the gold wire area of ​​the circuit board: By setting a fixed cover and a movable cover, protection of the gold wire area is formed. The movable cover can be flexibly flipped as needed, which facilitates operation and enhances the flexibility of protection. When the gold wire area is not involved in operation, the movable cover can completely cover the gold wire area, effectively preventing external factors such as dust and moisture from corroding the gold wire area. When the gold wire area is involved in operation, the movable cover flips over the fixed cover, and the operator holds the fixed cover in place, effectively reducing damage to the circuit board.

[0017] It boasts high reliability and stability: the setting of the calibration plate allows the movable cover to be firmly fixed to the circuit board without flipping it over; the introduction of magnets allows the movable cover to be firmly attached to the fixed cover after it is flipped over, which not only prevents the movable cover from being accidentally opened, but also allows the operator to easily open the movable cover when needed, achieving a perfect combination of convenience and safety. Attached Figure Description

[0018] Figure 1 The diagram shows the structure of the circuit board.

[0019] Figure 2 The diagram shown is a structural schematic of the protective cover for the circuit board provided in this embodiment.

[0020] Figure 3 Displayed as Figure 2 The protective cover shown covers Figure 1 The diagram shows the structure of the circuit board.

[0021] Figure 4a Displayed as Figure 2 The fixed cover plate shown is in the front view on the XY plane.

[0022] Figure 4b Displayed as Figure 2 The fixed cover plate shown is viewed from the side in the YZ plane.

[0023] Figure 4c Displayed as Figure 2 The fixed cover plate shown is viewed from the side in the XZ plane.

[0024] Figure 4d Displayed as Figure 2 The fixed cover plate shown is viewed from below in the XY plane.

[0025] Figure 5a Displayed as Figure 2 The movable cover shown is a front view in the XY plane.

[0026] Figure 5b Displayed as Figure 2The movable cover shown is viewed from the side in the YZ plane.

[0027] Figure 5c Displayed as Figure 2 The movable cover shown is viewed from the side in the XZ plane.

[0028] Figure 5d Displayed as Figure 2 The movable cover shown is viewed from below in the XY plane.

[0029] Figure 6 Displayed as Figure 2 The diagram shows the corrective pressure plate and bolt structure.

[0030] Figure 7a Displayed as Figure 2 The diagram shows a top view of the corrective tablet.

[0031] Figure 7b Displayed as Figure 7a The cross-sectional view of the corrected tablet in the AA' direction is shown.

[0032] Figure 8a Displayed as Figure 2 The diagram shows a front view of an internally threaded bolt.

[0033] Figure 8b Displayed as Figure 8a The diagram shows a cross-sectional view of the internally threaded bolt in the AA' direction.

[0034] Figure Labels

[0035] 001, Circuit board; 010, Component area; 011, Gold wire area; 012, Non-component area.

[0036] 111. Fixed cover plate; 112. First top surface; 113. Bolt; 114. First bottom surface; 121. Movable cover plate; 122. Second top surface; 123. Second bottom surface; 124. Connecting strip; 130. First groove; 131. Second groove; 132. Third groove; 133. Fourth groove; 140. Magnet; 150. Correcting pressure plate; 134. Fifth groove; 151. Internal threaded bolt; 1511. Bolt head; 1512. Bolt shank; 1513. Inner hole; 152. Countersunk bolt; 153. Through hole; 1531. Inner through hole; 15132. Outer through hole; 160. Gasket; 170. Support block. Detailed Implementation

[0037] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0039] Example

[0040] This embodiment provides a circuit board protective cover. Specifically, this embodiment uses... Figure 1 The circuit board shown is used as an example to illustrate the structure of the circuit board protective cover. However, it should be noted that the protection range of the circuit board protective cover provided by this utility model is not limited to... Figure 1 The protective cover for the circuit board shown.

[0041] like Figure 1 As shown, circuit board 001 includes a component area 010, a gold wire area 011, and a non-component area 012. For example... Figure 2 The diagram shown is a structural schematic of the protective cover for the circuit board provided in this embodiment; Figure 2 As can be seen, the protective cover includes a fixed cover plate 111 and a movable cover plate 121. For example... Figure 3 As shown, it is displayed as Figure 2 The protective cover shown covers Figure 1 The diagram shows the structure of the circuit board. Figure 3 As can be seen, the fixed cover plate 111 is fixed to one side of the device area 010 of the circuit board 001. The movable cover plate 121 is hinged to the fixed cover plate 111 so that it can be flipped relative to the fixed cover plate 111. When the movable cover plate 121 is in the fixed state relative to the fixed cover plate 111, the movable cover plate 121 at least covers the gold wire area 011. When gold wire work is involved, the movable cover plate 121 can be flipped over the fixed cover plate 111 for work; when the circuit board 001 is performing work that does not involve the gold wire area 011, the protective cover can effectively protect the gold wires in the gold wire area 011.

[0042] like Figure 2As shown, the fixed cover plate 111 has a first top surface 112 on the side away from the circuit board 001 and a first bottom surface 114 on the side closer to the circuit board 001. The movable cover plate 121 has a second top surface 122 on the side away from the circuit board 001 and a second bottom surface 123 on the side closer to the circuit board 001. A hinge device is provided on the first top surface 112 and the second top surface 122, so that the movable cover plate 121 can be flipped onto the first top surface of the fixed cover plate 111. Specifically, the protective cover is also provided with a support block 170 for supporting the protective cover on the circuit board. Specifically, the support block 170 is fixedly disposed on the first bottom surface 114 and the second bottom surface 122 respectively.

[0043] Generally, fixed connection methods include: bonding, welding, threaded connection, and other connection methods. Specifically, in this embodiment, such as... Figure 2 As shown, the fixing cover plate 111 is fixed to the circuit board 001 using bolts 113. Generally, the hinge device for achieving flipping includes: hinge, connecting strip, or other hinge device that can achieve flipping. Specifically, the hinge device provided in this embodiment is a connecting strip 124. Specifically, as... Figure 2 As shown, at the connection between the fixed cover plate 111 and the movable cover plate 121, grooves for placing the connecting strap 124 are provided opposite to each other on the first top surface 112 and the second top surface 122. Generally, the number of grooves for placing the connecting strap 124 can be set according to the actual size of the protective cover, and can be 1, 2, 3, etc. Specifically, in this embodiment, two grooves are provided, namely the first groove 130 and the second groove 131. The first groove 130 and the second groove 131 are symmetrically arranged with the center line of the protective cover as the axis of symmetry. Generally, the thickness of the first groove 130 and the second groove 131 is less than or equal to the thickness of the cover plate. In particular, in this embodiment, the thickness of the fixed cover plate 111 and the movable cover plate 121 is relatively thin, so the thickness of the first groove 130 and the second groove 131 is greater than the thickness of the cover plate. Generally, the material of the connecting strap 124 includes: rubber, silicone, plastic and other materials with a certain degree of elasticity. Specifically, in this embodiment, a silicone strip is used as the connecting strap 124. The silicone strip is fixed in the first groove 130 and the second groove 131 by means of adhesive or screw fixing. In this embodiment, the silicone strip is glued to the first groove 130 and the second groove 131, and the thickness of the hinge device, i.e., the silicone strip, is less than or equal to the thickness of the first groove 130 and the second groove 131, so that the movable cover plate 121 can be flipped onto the fixed cover plate 111.

[0044] Generally, the length of the protective cover is greater than or equal to the length of the circuit board. The length of the protective cover is between 200 mm and 300 mm. Specifically, in this embodiment, the length of the protective cover is equal to the length of circuit board 001. The length of circuit board 001 is 236 mm. Figures 4a-4d As shown, it is displayed as Figure 2 The three views and bottom view of the fixed cover plate 111 are shown. Figures 5a-5d As shown, it is displayed as Figure 2 The diagram shows the three-view drawing and the bottom view of the movable cover plate 121. Figure 4a and Figure 5a As can be seen, the length of the protective cover provided in this embodiment is 236 mm. Generally, the width of the fixed cover plate 111 and the width of the movable cover plate 121 are set according to the actual width of the circuit board and the position of the gold wire area. The sum of the widths of the fixed cover plate 111 and the movable cover plate 121 is greater than or equal to the sum of the widths of the semiconductor device area and the gold wire area. Generally, the width of the fixed cover plate 111 is less than or equal to the width of the movable cover plate 121. Specifically, in this embodiment, the width of the fixed cover plate 111 is less than the width of the movable cover plate 121. Figure 4b As shown, the width of the fixed cover plate 111 is 10 mm. Figure 5b As shown, the width of the movable cover plate 121 is 24.5 mm.

[0045] Generally, the shape and size of the support block 170 can be designed according to the actual size of the protective cover. For example... Figure 4d The top view structure of the fixed cover shown and Figure 5d As shown in the top view of the protective cover, the support blocks 170 are positioned opposite each other at both ends of the bottom surface of the protective cover. The size and shape of the support blocks 170 on the first bottom surface 114 and the second bottom surface 123 are different. Specifically, the support block 170 on the first bottom surface 114 is larger than the support block 170 on the second bottom surface 123.

[0046] Generally, the thickness of the fixed cover plate 111 and the movable cover plate 121 can be set according to the actual thickness of the circuit board. Generally, the thickness of the fixed cover plate 111 and the movable cover plate 121 is less than or equal to the actual thickness of the circuit board. Further, the thickness of the fixed cover plate 111 and the movable cover plate 121, including the support block 170, is between 0.5 mm and 3 mm. Specifically, in this embodiment, the thickness of the fixed cover plate 111 including the support block 170 is 5.4 mm; the thickness of the movable cover plate 121 including the support block 170 is 3.8 mm.

[0047] Specifically, the protective cover provided in this embodiment also includes a magnet 140. For example... Figure 3As shown, two magnets 140 are provided, respectively disposed on the top surfaces of the fixed cover plate 111 and the movable cover plate 121, so that the movable cover plate 121 can be firmly attracted to the fixed cover plate 111 when it is flipped. Generally, the magnets 140 can be fixed to the fixed cover plate 111 and the movable cover plate 121 by other connection methods such as gluing or welding. Specifically, in this embodiment, in order to enhance the tight fit between the fixed cover plate 111 and the movable cover plate 121, a third groove 132 is provided on the first top surface 112, and a fourth groove 133 is provided on the second top surface 122. The third groove 132 and the fourth groove 133 are symmetrical about the line connecting the first top surface 112 and the second top surface 122. The magnets 140 are embedded in the third groove 132 and the fourth groove 133, and the thickness of the magnets 140 is less than or equal to the thickness of the third groove 132 and the fourth groove 133, so as to ensure that the movable cover plate 121 is firmly attracted to the fixed cover plate 111 after flipping. Generally, the size and shape of the magnet 140 can be selected according to the actual size of the protective cover. The magnet 140 can be rectangular, circular, or other shapes. Specifically, in this embodiment, the magnet 140 is a circle with a diameter of 4 mm.

[0048] Specifically, the protective cover provided in this embodiment also includes a correction plate 150. One end of the correction plate 150 is rotatably mounted on the first top surface 112, so that the other end of the correction plate 150 presses against or releases the movable cover plate 121. This allows the movable cover plate 121 to be securely fixed to the circuit board by the correction plate 150 without flipping over. Generally, the size and position of the correction plate 150 are set according to the size of the protective cover. Specifically, for example... Figure 2 As shown, in this embodiment, the correction plate 150 is positioned in the middle of the protective cover. The correction plate 150 has a long strip structure, and the portion of the correction plate 150 above the movable cover plate 121 is greater than or equal to the portion of the correction plate 150 above the fixed cover plate 111. A fifth groove 134 is provided at the connection between the first top surface 112 and the second top surface 123. The correction plate 150 is connected to the fifth groove 134 by bolts. Generally, the fifth groove 134 is rectangular or circular; in this embodiment, the fifth groove 134 is square. Optionally, the thickness of the correction plate 150 is less than or equal to the thickness of the fifth groove 134. Specifically, as shown... Figure 6 The diagram shown illustrates the correction pressure plate 150 and the bolt structure; Figure 6 As can be seen, the bolt structure for fixing the correction plate 150 includes an internally threaded bolt 151 and a matching countersunk bolt 152. Generally, the size of the internally threaded bolt 151 and the countersunk bolt 152 can be set according to the actual size of the correction plate 150.

[0049] Specifically, such as Figure 7aThe diagram shown is a top view of the correction pressure plate 150. The correction pressure plate 150 is a long strip structure, and one end of the correction pressure plate 150 is provided with a through hole 153. Generally, the length of the correction pressure plate 150 is less than or equal to the side length of the fifth groove 134. Specifically, the length of the correction pressure plate 150 is between 10 mm and 15 mm, and the width is between 3 mm and 5 mm. In this embodiment, the correction pressure plate 150 has a length of 13 mm and a width of 4 mm. Figure 7b The cross-sectional view of the correction pressure plate 150 in the AA' direction is shown. Generally, the thickness of the correction pressure plate 150 is less than the thickness of the fifth groove 134; specifically, the thickness of the correction pressure plate 150 is 1 mm. The through hole 153 is used to rotatably mount the correction pressure plate 150 onto the fixed cover plate 111. Specifically, the through hole 153 is a circular through hole, including an inner through hole 1531 and an outer through hole 1532. Generally, the diameters of the inner through hole 1531 and the outer through hole 1532 are matched to the bolt structure used for fixing, with the diameter of the inner through hole 1531 being smaller than the diameter of the outer through hole 1532. Specifically, in this embodiment, the diameter of the inner through hole 1531 is 2.6 mm, and the diameter of the outer through hole 1532 is 3.5 mm. Furthermore, the thickness of the inner through hole 1531 is less than the thickness of the outer through hole 1532; the thickness of the inner through hole 1531 is 0.4 mm, and the thickness of the outer through hole 1532 is 0.6 mm.

[0050] Specifically, such as Figure 8a The diagram shown is a front view of an internally threaded bolt 151. The internally threaded bolt 151 includes a bolt head 1511 and a bolt shank 1512. Figure 8a It can be seen that the diameter of the bolt head 1511 of the internal threaded bolt 151 is larger than the diameter of the bolt shank 1512. Referring to Figure 7, it can be concluded that the diameter of the bolt shank 1512 is less than or equal to the diameter of the inner through hole 1531, and the diameter of the bolt head 1511 is less than or equal to the diameter of the outer through hole 1532. Specifically, the diameter of the bolt head 1511 is 3.3 mm, and the diameter of the bolt shank 1512 is 2.5 mm. Specifically, the thickness of the bolt head 1511 is less than the thickness of the bolt shank 1512, and the length of the bolt shank 1512 is less than or equal to the thickness of the fixing cover plate 111. Specifically, the thickness of the bolt shank 1512 is between 1.3 mm and 3 mm. In this embodiment, the thickness of the bolt shank 1512 is 1.5 mm, and the thickness of the bolt head 1511 is 0.5 mm. Figure 8b The diagram shown is a cross-sectional view of the internally threaded bolt 151 in the AA' direction. Figure 8b It can be seen that the internal threaded bolt 151 has an internal hole 1513 inside, and the height of the internal hole 1513 is greater than or equal to the height of the bolt shank 1512.

[0051] Specifically, the thickness of the hinge device, the corrective pressure plate 150, and the magnet 140 is less than or equal to the thickness of the groove in which they are located. The movable cover plate 121 can be rotated at an angle between 0 and 180 degrees. This allows the first top surface 112 and the second top surface 122 to fit together when the movable cover plate 121 is rotated onto the fixed cover plate 111.

[0052] For details, please continue reading Figure 4d and Figure 5d In this embodiment, the first bottom surface 114 and the second bottom surface 122 of the protective cover are provided with pads 160 for supporting the protective cover on the circuit board 001, so that there is a certain distance between the protective cover and the circuit board 001, which better protects the circuit board and ensures that the protective cover can be placed stably on the circuit board 001. Figure 3 The structural schematic diagram of the fixed cover plate shown in the bottom view and Figure 4d The diagram shows a top view of the movable cover plate. Generally, the number and position of the gaskets 160 are set according to the actual situation of the component area 010 in the circuit board 001. The gaskets 160 are located on the first bottom surface 114 and the second bottom surface 122, relative to the positions in the component area 010 where no components are located, to avoid direct contact between the gaskets 160 and the components on the circuit board 001, which could lead to damage to the components. Specifically, the height of the gasket 160 is equal to the distance between the second bottom surface 122 and the circuit board 001. Specifically, as shown... Figure 1 As shown, the circuit board 001 provided in this embodiment contains a non-device area 012. The specific positions of the spacers 160 are determined according to the location of the non-device area 012. Generally, the number of spacers 160 can be 5 to 10. For example... Figure 3 and Figure 4d and Figure 5d As shown, in this embodiment, 10 gaskets are provided, evenly distributed on the second bottom surface 122. Generally, the gasket 160 can be made of plastic, rubber, ceramic, or glass.

[0053] The protective cover provided in this embodiment is flexibly configured with a fixed cover plate 111 and a movable cover plate 121, which can effectively protect the gold wire area 011. When working on the gold wire area 011, the movable cover plate 121 can be flipped onto the fixed cover plate 111 for operation; when not working on the gold wire area 011, the movable cover plate 121 can cover the gold wire area 011, effectively preventing the gold wire area 011 from being affected by factors such as handling and dust. The protective cover is also provided with a correction pressure plate 150, which can firmly fix the movable cover plate 121 on the circuit board 001 without flipping it. In addition, a magnet 140 is provided, which can firmly attach the movable cover plate 121 to the fixed cover plate 111, ensuring that the movable cover plate 121 will not be accidentally opened under various circumstances, and that the user can easily open the movable cover plate 121 when it is necessary to operate the circuit board 001, improving the convenience of use. In summary, the protective cover provided in this embodiment has a flexible design that can adapt to the operational needs of circuit boards of different complexities. Furthermore, with the cooperation of the correction plate and the magnet, the flexibility and convenience of the device are improved.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A protective cover for a circuit board including a device area and a gold wire area thereon, characterized by, The protective cover is fixed above the circuit board, and the protective cover comprises: A fixed cover plate fixed to one side of the device area of the circuit board; An active cover plate connected with the fixed cover plate through a hinge device, and the active cover plate can be flipped relative to the fixed cover plate, and when the active cover plate is in an unflipped state relative to the fixed cover plate, the active cover plate covers at least the device area and the gold wire area.

2. The circuit board protection cover according to claim 1, characterized by The active cover plate is flipped along the center line of the joint line between the active cover plate and the fixed cover plate.

3. The circuit board protection cover according to claim 2, characterized in that, The side of the fixed cover plate away from the circuit board is defined as a first top surface, the side of the fixed cover plate close to the circuit board is defined as a first bottom surface, the side of the active cover plate away from the circuit board is defined as a second top surface, and the side of the active cover plate close to the circuit board is defined as a second bottom surface, and the first top surface and the second top surface are provided with magnets, and when the active cover plate is flipped onto the fixed cover plate, the active cover plate can be stably adsorbed on the fixed cover plate.

4. The circuit board protection cover according to claim 3, characterized in that, A correction pressing piece is further included, one end of the correction pressing piece is rotatably installed on the first top surface, and the other end of the correction pressing piece presses the active cover plate or releases the active cover plate.

5. The circuit board protection cover according to claim 4, characterized in that The correction pressing piece is arranged at a middle position of the protective cover, the correction pressing piece has a long strip structure, and the part of the correction pressing piece located on the active cover plate is greater than or equal to the part of the correction pressing piece located on the fixed cover plate.

6. The circuit board protection cover according to claim 1, wherein Two hinge devices are included, and the hinge devices are symmetrically arranged at the center line of the cover plate.

7. The circuit board protection cover according to claim 5, wherein The first top surface and the second top surface are provided with grooves, and the hinge device, the correction pressing piece and the magnets are arranged in the grooves.

8. The circuit board protection cover according to claim 7, characterized in that, The thickness of the hinge device, the correction pressing piece and the magnets is less than or equal to the thickness of the grooves.

9. The circuit board protection cover according to claim 3, characterized by The flipping angle of the active cover plate is between 0 and 180 degrees, and when the active cover plate is flipped by 180 degrees, the first top surface and the second top surface are attached.

10. The circuit board protection cover according to claim 3, characterized by The first bottom surface and the second bottom surface are provided with gaskets, and the gaskets are located in the area of the device area of the circuit board where no device is arranged.

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