Circuit board assembly, electromagnetic shielding assembly and electronic equipment

Abstract

The utility model provides a circuit board assembly, an electromagnetic shielding assembly and electronic equipment, and the circuit board assembly comprises a circuit board body which is provided with a plurality of electrical components; the electromagnetic shielding assembly is arranged corresponding to the plurality of electrical components, the electromagnetic shielding assembly comprises a shielding layer and an insulating layer, the insulating layer is fixedly arranged on one surface, facing the circuit board body, of the shielding layer, the electromagnetic shielding assembly is fixedly connected with the circuit board body, and the insulating layer covers at least one electrical component; wherein the position, opposite to each covered electrical component, of the shielding layer is provided with a perspective through hole, each perspective through hole forms a projection area on the circuit board body, and at least part of the structure of each covered electrical component is located in the corresponding projection area. After assembly is completed, whether the phenomenon of missing pasting of the insulating layer exists or not can be visually checked through the perspective through hole, the checking mode is simple and rapid, the working efficiency is high, and effective control over the product quality is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of circuit boards, and in particular to a circuit board assembly, an electromagnetic shielding assembly and an electronic device. Background Art

[0002] At present, FPC boards (Flexible Printed Circuit Boards) and other circuit board structures are widely used in the field of electronic products (for example, in mobile phone screens). Taking FPC boards as an example, some electrical components are usually installed on FPC boards, and pads are formed at the connections between the electrical components. Due to the limited internal space of electronic products, in order to prevent the electrical components from being electromagnetically interfered, an electromagnetic shielding layer (such as conductive cloth) is generally set on the circuit board parts and electrical components that are susceptible to interference, and insulating tape is pasted on the corresponding positions of the electrical components to prevent short circuits.

[0003] However, in the existing production process, it is necessary to first apply insulating tape to the target position of the circuit board, and then apply the electromagnetic shielding layer. Since applying insulating tape is usually a manual operation, the work efficiency and accuracy are low, and since the insulating tape is completely blocked by the electromagnetic shielding layer after the electromagnetic shielding layer is applied, it is difficult to visually check whether there is any leakage of insulating tape. Once an unstable short circuit occurs, it is difficult to eliminate the possibility of short circuit caused by leakage of insulating tape through testing. Therefore, the circuit board structure produced by the existing process is not convenient for checking insulating tape, which is not conducive to product quality control. Utility Model Content

[0004] In order to solve the problem in the prior art that the circuit board structure is not convenient for checking whether the insulating tape is missing, which is not conducive to product quality control, the present application provides a circuit board assembly, an electromagnetic shielding assembly and an electronic device.

[0005] In an embodiment of the first aspect of the technical solution of the present application, a circuit board assembly is provided, comprising: a circuit board body, on which a plurality of electrical components are arranged; and an electromagnetic shielding assembly, which is arranged corresponding to the plurality of electrical components, the electromagnetic shielding assembly comprising a shielding layer and an insulating layer, the insulating layer being fixedly arranged on a side of the shielding layer facing the circuit board body, the electromagnetic shielding assembly being fixedly connected to the circuit board body, and the insulating layer covering at least one electrical component; wherein, a perspective through hole is opened on the shielding layer at a position opposite to each covered electrical component, each perspective through hole forms a projection area on the circuit board body, and at least a partial structure of each covered electrical component is located within the corresponding projection area.

[0006] In a further embodiment of the present application, at least one covered electrical component is entirely located within the corresponding projection area.

[0007] In a further embodiment of the present application, at least two electrical components are connected via a soldering pad, wherein the soldering pad and the at least two electrical components connected via the soldering pad are integrally located within a corresponding projection area.

[0008] In a further embodiment of the present application, the insulating layer includes at least one insulating tape; a first adhesive layer is provided on the surface of the shielding layer facing the insulating tape, and the insulating tape is adhesively connected to the shielding layer through the first adhesive layer; and / or the circuit board body is a flexible circuit board, and the electromagnetic shielding component is a flexible shielding structure.

[0009] In a further embodiment of the present application, the insulating tape is a colored tape; and / or an adhesive layer through hole is provided on the first adhesive layer at a position opposite to the transparent through hole, and the adhesive layer through hole is connected to the corresponding transparent through hole.

[0010] In a further embodiment of the present application, an insulating layer simultaneously covers electrical components corresponding to multiple perspective through holes; or the insulating layer includes multiple insulator units, and each insulator unit covers at least one electrical component corresponding to a perspective through hole.

[0011] An embodiment of the second technical solution of the present application provides an electromagnetic shielding component, including: a shielding layer, on which a plurality of transparent through holes are opened; and an insulating layer, which is fixedly arranged on one side of the shielding layer; wherein the insulating layer can cover at least one electrical component on the circuit board body, and each transparent through hole can form a projection area on the circuit board body so that at least part of the structure of each covered electrical component is located within the projection area.

[0012] In a further embodiment of the present application, the insulating layer includes at least one insulating tape; a first adhesive layer is provided on the surface of the shielding layer facing the insulating tape, and the insulating tape is adhered and connected to the shielding layer through the first adhesive layer; or an insulating layer covers multiple electrical components at the same time; or the insulating layer includes multiple insulator units, and each insulator unit covers at least one electrical component.

[0013] In a further embodiment of the present application, the insulating tape is a colored tape; and / or an adhesive layer through hole is provided on the first adhesive layer at a position opposite to the transparent through hole, and the adhesive layer through hole is connected to the corresponding transparent through hole; and / or the electromagnetic shielding component is a flexible shielding structure.

[0014] An electronic device is provided in an embodiment of the third aspect of the technical solution of the present application, comprising: a display screen having a backlight assembly; a circuit board assembly in any embodiment of the first aspect of the technical solution, wherein a side of the circuit board body of the circuit board assembly away from the electromagnetic shielding assembly is connected to the backlight assembly.

[0015] The beneficial effects of the above technical solution in this application are:

[0016] By providing transparent through holes corresponding to the electrical components of the circuit board body on the electromagnetic shielding component, after the electromagnetic shielding component is assembled and connected with the circuit board body, it is possible to visually check through the transparent through holes whether there is any leakage of the insulation layer. The inspection method is simple and fast, with high work efficiency, which facilitates effective control of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a circuit board assembly in one embodiment of the present application;

[0018] Figure 2 This is an exploded schematic diagram of a circuit board assembly in one embodiment of the present application;

[0019] Figure 3 A perspective view of a partial structure of a circuit board assembly in one embodiment of the present application;

[0020] Figure 4 A perspective view of a partial structure of a circuit board assembly in another embodiment of the present application;

[0021] Figure 5 is an exploded schematic diagram of a circuit board assembly in another embodiment of the present application;

[0022] Figure 6 This is an exploded schematic diagram of a circuit board assembly in yet another embodiment of the present application;

[0023] Figure 7 This is a schematic diagram of the structure of an electronic device in an embodiment of the present application;

[0024] Figure 8 It is a schematic diagram of an exploded view of an electronic device in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] 100 circuit board assemblies;

[0027] 1 circuit board body, 11 projection area, 111 electrical components;

[0028] 2 electromagnetic shielding component, 21 shielding layer, 211 transparent through hole, 22 insulating layer, 221 insulating adhesive tape, 222 insulator unit, 23 first adhesive layer, 231 adhesive layer through hole;

[0029] 300 electronic device, 31 display screen, 311 backlight assembly, 312 second adhesive layer. DETAILED DESCRIPTION

[0030] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0031] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0032] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0033] Some embodiments of the circuit board assembly, electromagnetic shielding assembly and electronic device of the present application are provided below with reference to the accompanying drawings.

[0034] Please refer to Figures 1 to 3In the embodiment of the first aspect of the present application, a circuit board assembly 100 is provided, comprising a circuit board body 1 and an electromagnetic shielding assembly 2. A plurality of electrical components 111 are arranged on the circuit board body 1. The electromagnetic shielding assembly 2 is arranged on a side of the circuit board body 1 where the electrical components 111 are arranged, and is arranged corresponding to the plurality of electrical components 111; the electromagnetic shielding assembly 2 comprises a shielding layer 21 and an insulating layer 22, and the insulating layer 22 is connected to a side of the shielding layer 21 facing the circuit board body 1, and a side of the insulating layer 22 away from the shielding layer 21 is connected to the circuit board body 1, and the insulating layer 22 covers the plurality of electrical components 111 on the circuit board body 1. The electromagnetic shielding effect of the shielding layer 21 prevents the electrical components 111 on the circuit board body 1 from being subjected to electromagnetic interference, and the insulating layer 22 plays an insulating isolation role between the shielding layer 21 and the electrical components 111. Among them, a transparent through hole 211 is opened on the shielding layer 21 at a position opposite to each covered electrical component 111, and the transparent through hole 211 forms a projection area 11 on the circuit board body 1, and at least part of the structure of each covered electrical component 111 is located in the corresponding projection area 11, so that the insulating layer 22 covering the electrical component 111 can be observed through the corresponding transparent through hole 211, so as to facilitate inspection after the circuit board assembly 100 is assembled to prevent the insulating layer 22 from being missed.

[0035] It is understandable that the existing process usually adopts manual operation to carry out the insulation layer installation operation, and the shielding layer in the existing circuit structure will completely block the insulation layer after assembly, and it is impossible to visually check whether there is any missing installation at a later time; and because the short circuit phenomenon caused by the missing insulation layer is an unstable short circuit, it is difficult to rule out the possibility of missing insulation layer through instrument testing, resulting in difficulty in inspecting the insulation layer after the existing circuit board structure is assembled, which is not conducive to product quality control.

[0036] The circuit board assembly 100 in this embodiment, by providing a transparent through hole 211 corresponding to the electrical component 111 of the circuit board body 1 on the electromagnetic shielding assembly 2, can visually check through the transparent through hole 211 whether there is a sticking phenomenon of the insulating layer 22 after the insulating layer 22, the electromagnetic shielding assembly 2 and the circuit board body 1 are connected. The inspection method is simple and fast, with high work efficiency, which is convenient for effective control of product quality.

[0037] It should be noted that the circuit board body 1 in this embodiment is not limited to a flexible circuit board; the number, shape, size, and position of the transparent through holes 211 are not limited to Figures 1 to 3 In the example, the configuration can be performed specifically according to the actual situation of the electrical components 111 on the circuit board body 1.

[0038] It should also be noted that, in the circuit board assembly 100 that is correctly assembled according to the process requirements, the electrical component 111 needs to be covered with the insulating layer 22, and whether the insulating layer 22 is missing can be checked by visually observing whether the electrical component 111 has the insulating layer 22, and it is not necessary to set the entire electrical component 111 within the projection area 11 of the perspective through hole 211. Therefore, in actual applications, the perspective through hole 211 can be set to a suitable size on the premise of meeting the visual inspection requirements, so that at least part of the structure of the electrical component 111 can be observed within the projection area 11 of the corresponding perspective through hole 211 to see whether the insulating layer 22 exists, such as Figure 3 The example in , thus taking into account both the visual inspection effect and the electromagnetic shielding effect.

[0039] In further embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 4 On the circuit board body 1, at least one covered electrical component 111 is entirely located within the projection area 11 of the corresponding perspective through hole 211, so that after assembly, a perspective inspection device (such as an X-ray device) can be used to perform perspective inspection on the electrical component 111 as a whole through the corresponding perspective through hole 211 to further ensure the quality of the product. Figure 4 In the example, in a specific embodiment, among the three perspective through holes 211, all the electrical components 111 corresponding to each perspective through hole 211 are located as a whole in the projection area 11 of the perspective through hole 211, so that each perspective through hole 211 can simultaneously perform inspection of the insulating layer 22 and perspective detection of the electrical components 111.

[0040] It can be understood that the existing electromagnetic shielding structure cannot be penetrated by the detection rays of the perspective detection equipment due to the electromagnetic shielding effect of the shielding layer, making it difficult to detect the electrical components. In this embodiment, by providing a perspective through hole 211, and the electrical component 111 corresponding to the perspective through hole 211 is located as a whole within the projection area 11 of the perspective through hole 211, the detection rays of the perspective detection equipment can pass through the perspective through hole 211 and the insulating layer 22 to propagate to the corresponding electrical component 111, so that the corresponding perspective detection can be performed on the electrical component 111 as a whole, thereby achieving both anti-interference and perspective detection effects on the electrical component 111.

[0041] It should be noted that, in practical applications, since the shape and size of the electrical component 111 are fixed, the corresponding transparent through hole 211 can be set to a suitable shape and size according to the specific situation of the electrical component 111 to ensure that the entire electrical component 111 can be detected.

[0042] Please refer to Figure 2 and Figure 4In a further embodiment, at least one perspective through hole 211 corresponds to multiple electrical components 111 at the same time, and multiple electrical components 111 corresponding to the same perspective through hole 211 are connected through pads (not shown in the figure), and the pads and the multiple electrical components 111 connected through the pads are all located within the projection area 11 of the corresponding perspective through hole 211. After assembly, not only can the electrical components 111 be perspectively inspected through the perspective through hole 211, but also the pads can be perspectively inspected accordingly to ensure the process quality of the pads.

[0043] Please refer to Figure 2 In a further embodiment of the present application, the insulating layer 22 of the electromagnetic shielding component 2 is specifically in the form of an insulating tape 221. A first adhesive layer 23 is provided on the surface of the shielding layer 21 of the electromagnetic shielding component 2 facing the insulating tape 221, and the side of the insulating tape 221 facing the shielding layer 21 is bonded and connected to the shielding layer 21 through the first adhesive layer 23, so that the insulating tape 221 and the shielding layer 21 form an integrated structure. During the assembly operation, the shielding layer 21 with the insulating tape 221 can be directly attached to the circuit board body 1, and the insulating tape 221 can be bonded and connected to the circuit board body 1 through the adhesive surface of the insulating tape 221 itself. The above-mentioned arrangement can improve the existing assembly process of separately attaching the insulating tape 221 to the circuit board body 1, and adopt the integrated electromagnetic shielding component 2 to be directly assembled on the circuit board body 1, which improves the assembly efficiency on the one hand, and can also help to avoid the insulation tape 221 from being missed on the other hand.

[0044] Please refer to Figure 2 In a further embodiment, a glue layer through hole 231 is provided on the first adhesive layer 23 at a position opposite to each perspective through hole 211, and the glue layer through hole 231 is arranged to be connected with the corresponding perspective through hole 211, so that the area on the insulating layer 22 corresponding to the perspective through hole 211 will not be blocked by the first adhesive layer 23, so that the insulating layer 22 is easier to be observed or detected. It can be understood that the light transmittance of the adhesive layer formed by the commonly used glue is relatively poor. If the area on the insulating layer 22 corresponding to the perspective through hole 211 is covered by the adhesive layer, it will cause difficulties in the inspection process of the insulating layer 22. In this embodiment, the above problem can be effectively avoided by providing the glue layer through hole 231.

[0045] In a further embodiment, the insulating tape 221 is specifically made of colored tape, such as light yellow tape, so that the insulating tape 221 can be distinguished from other surrounding parts by its color, thereby enhancing visibility and making the insulating tape 221 more easily observed visually or detected by a machine, thereby facilitating the inspection accuracy of the insulating tape 221 and further reducing the possibility of missing the insulating tape 221. Of course, in actual applications, the insulating tape 221 can also be made of other easily distinguishable colors.

[0046] Please refer to Figure 2 Furthermore, in a specific embodiment, an insulating layer 22 simultaneously covers the electrical components 111 corresponding to the plurality of perspective through holes 211 and insulates the plurality of electrical components 111. The insulating layer 22 can be set to an appropriate size according to the positional relationship between the plurality of perspective through holes 211 to meet the requirement of simultaneously covering the electrical components 111 corresponding to the plurality of perspective through holes 211. Figure 2 For example, a whole insulating layer 22 covers all electrical components 111 corresponding to the transparent through holes 211 at the same time, and the insulating layer 22 can be attached at one time during the assembly process, which is conducive to improving production efficiency and facilitating the processing of the insulating layer 22. At the same time, it can also further reduce the possibility of individual electrical components 111 missing the insulating layer 22. Specifically, the insulating layer 22 can be a whole sheet of insulating tape 221.

[0047] Please refer to Figure 5 Further, in another specific implementation, the insulating layer 22 includes a plurality of insulating subunits 222, and each insulating subunit 222 is arranged corresponding to at least one of the perspective through holes 211, that is, each insulating subunit 222 only covers the electrical components 111 corresponding to one of the perspective through holes 211 or a portion of the perspective through holes 211 among all the perspective through holes 211, thereby reducing the area and amount of the insulating layer 22, which is conducive to saving material costs. Specifically, each insulating subunit 222 can use a separate insulating adhesive tape 221.

[0048] like Figure 5 In the example, each insulator unit 222 only covers the electrical component 111 corresponding to one perspective through hole 211 , that is, the multiple insulator units 222 correspond to the multiple perspective through holes 211 one by one.

[0049] Of course, if Figure 6 In the example, an insulator unit 222 may also be provided to simultaneously cover the electrical components 111 corresponding to at least two perspective through holes 211 that are relatively close to each other. Specifically, the insulator unit 222 may be provided according to the positional relationship of the perspective through holes 211, which will not be described in detail here.

[0050] It should be noted that the insulating tape 221 in the above embodiment is not limited to the rectangular structure shown in the figure, and a suitable shape and size can be selected according to the specific situation of the electrical component 111 in actual application.

[0051] Please refer to Figures 1 to 6In a further embodiment of the present application, the circuit board body 1 in the circuit board assembly 100 adopts a flexible circuit board, such as an FPC board, and accordingly, the electromagnetic shielding assembly 2 also adopts a flexible shielding structure, such as a conductive cloth. The flexible characteristics of the flexible circuit board can be used to adapt to display screens of different structural forms, and the circuit board assembly 100 has a wider range of applications.

[0052] Please refer to Figures 1 to 6 In the embodiment of the second aspect of the present application, an electromagnetic shielding assembly 2 is further provided, and the electromagnetic shielding assembly 2 includes a shielding layer 21 and an insulating layer 22. A plurality of perspective through holes 211 are provided on each other, and the insulating layer 22 is fixedly arranged on one side of the shielding layer 21. The electromagnetic shielding assembly 2 in this embodiment can be applied to the circuit board assembly 100 in any embodiment of the first aspect above, and after the electromagnetic shielding assembly 2 is assembled with the circuit board body 1, the insulating layer 22 can cover at least one electrical component 111 on the circuit board body 1, and each perspective through hole 211 corresponds to at least one electrical component 111; at the same time, the perspective through hole 211 of the shielding layer 21 can form a corresponding projection area 11 on the circuit board body 1, so that at least part of the structure of each covered electrical component 111 can be located in the projection area 11 of the corresponding perspective through hole 211, so as to provide conditions for the inspector to visually check whether the corresponding electrical component 111 is affixed with the insulating layer 22 through the perspective through hole 211 of the shielding layer 21, so as to prevent the insulating layer 22 from being missed during the assembly process.

[0053] Please refer to Figure 2 In a further embodiment, the insulating layer 22 of the electromagnetic shielding component 2 is specifically in the form of an insulating tape 221. A first adhesive layer 23 is provided on the surface of the shielding layer 21 of the electromagnetic shielding component 2 facing the insulating tape 221, and the side of the insulating tape 221 facing the shielding layer 21 is bonded and connected to the shielding layer 21 through the first adhesive layer 23, so that the insulating tape 221 and the shielding layer 21 form an integrated structure. When the electromagnetic shielding component 2 is assembled with the circuit board body 1, the shielding layer 21 with the insulating tape 221 can be directly attached to the circuit board body 1, and the insulating tape 221 can be bonded and connected to the circuit board body 1 by its own adhesive surface. The above-mentioned setting can improve the existing assembly process, and the integrated electromagnetic shielding component 2 is directly assembled on the circuit board body 1, which improves the assembly efficiency on the one hand, and can also help to avoid the insulation tape 221 from being missed on the other hand.

[0054] Please refer to Figure 2Furthermore, an adhesive layer through hole 231 is provided on the first adhesive layer 23 at a position opposite to each perspective through hole 211, and the adhesive layer through hole 231 is connected with the corresponding perspective through hole 211, so that the area on the insulating layer 22 corresponding to the perspective through hole 211 will not be blocked by the first adhesive layer 23, thereby making the insulating layer 22 easier to observe or detect, which is conducive to further reducing the difficulty of inspection.

[0055] Furthermore, the insulating tape 221 is specifically made of colored tape, such as light yellow tape, so as to distinguish the insulating tape 221 from other surrounding components by its color, thereby enhancing visibility and making the insulating tape 221 easier to be observed visually or detected by a machine. Of course, in actual applications, the insulating tape 221 may also be made of other easily distinguishable colors.

[0056] Furthermore, the electromagnetic shielding assembly 2 also adopts a flexible shielding structure (such as conductive cloth) so as to be compatible with a flexible circuit board (such as an FPC board).

[0057] Please refer to Figure 2 In another further embodiment, an insulating layer 22 covers the electrical components 111 corresponding to the plurality of perspective through holes 211 at the same time and insulates the plurality of electrical components 111. The insulating layer 22 can be set to an appropriate size according to the positional relationship between the plurality of perspective through holes 211 to meet the requirement of simultaneously covering the electrical components 111 corresponding to the plurality of perspective through holes 211. Figure 2 For example, an integral insulating layer 22 covers all transparent through holes 211 (eg Figure 2 The electrical components 111 corresponding to the three electrical components 111 shown in the figure can complete the installation operation of the insulating layer 22 at one time during the assembly process, which is conducive to improving production efficiency and facilitating the processing of the insulating layer 22. At the same time, it can also further reduce the possibility of missing the insulating layer 22 of individual electrical components 111. Specifically, the insulating layer 22 can be a whole piece of insulating tape 221.

[0058] Please refer to Figure 5 In yet another further embodiment, the insulating layer 22 includes a plurality of insulating subunits 222, and each insulating subunit 222 is disposed corresponding to at least one perspective through hole 211, that is, each insulating subunit 222 only covers the electrical component 111 corresponding to one perspective through hole 211 or the electrical component 111 corresponding to a portion of the perspective through holes 211 among all the perspective through holes 211, thereby reducing the area and amount of the insulating layer 22, which is beneficial to saving material costs. Specifically, each insulating subunit 222 can use a separate insulating adhesive tape 221.

[0059] like Figure 5In the example, each insulator unit 222 only covers the electrical component 111 corresponding to one perspective through hole 211 , that is, the multiple insulator units 222 correspond to the multiple perspective through holes 211 one by one.

[0060] Of course, if Figure 6 In the example, an insulator unit 222 may also be provided to simultaneously cover the electrical components 111 corresponding to at least two perspective through holes 211 that are close to each other, and may be specifically provided according to the positional relationship of the perspective through holes 211. In addition, the electromagnetic shielding assembly 2 in the second embodiment of the present application can be applied to the circuit board assembly 100 in the first embodiment, and thus has the beneficial effects of the electromagnetic shielding assembly 2 in the first embodiment, which will not be described in detail herein.

[0061] Please refer to Figure 7 and Figure 8 In the embodiment of the third aspect of the present application, an electronic device 300 is further provided, comprising a display screen 31 and the circuit board assembly 100 in any embodiment of the first aspect. The display screen 31 has a backlight assembly 311, and the side of the circuit board body 1 of the circuit board assembly 100 away from the electromagnetic shielding assembly 2 is connected to the backlight assembly 311 to achieve connection and fixation of the circuit board assembly 100 on the display screen 31.

[0062] like Figure 8 In the example, a second adhesive layer 312 can be provided on a side of the circuit board body 1 away from the electromagnetic shielding component 2 so that the circuit board body 1 and the backlight component 311 of the display screen 31 can be glued and connected through the second adhesive layer 312 during assembly.

[0063] In addition, the electronic device 300 in the embodiment of the third aspect of the present application includes the circuit board assembly 100 in any embodiment of the first aspect above, and thus has all the beneficial effects of the circuit board assembly 100 in any embodiment of the first aspect above, which will not be repeated here.

[0064] Please refer to Figures 1 to 8 In a specific embodiment of the present application, an electronic device 300 including a display screen 31 and a circuit board assembly 100 is provided.

[0065] The circuit board body 1 adopts an FPC board, and a plurality of electrical components 111 are arranged on the circuit board body 1. The electromagnetic shielding component 2 adopts a flexible shielding structure (such as conductive cloth), and is arranged on the side of the circuit board body 1 where the electrical components 111 are arranged. The electromagnetic shielding component 2 includes a shielding layer 21, an insulating layer 22 and a first adhesive layer 23; the insulating layer 22 specifically adopts a colored insulating tape 221 (such as light yellow tape), and the insulating tape 221 is arranged between the shielding layer 21 and the circuit board body 1; the surface of the shielding layer 21 facing the insulating tape 221 is provided with a first adhesive layer 23, and the insulating tape 221 is connected to the shielding layer 21 through the first adhesive layer 23 to form an integrated structure; the side of the insulating tape 221 away from the shielding layer 21 is adhered to the circuit board body 1 by its own adhesive. Among them, a whole sheet of insulating tape 221 covers multiple electrical components 111 at the same time, and a transparent through hole 211 is opened on the shielding layer 21 at a position opposite to each covered electrical component 111. The transparent through hole 211 forms a projection area 11 on the circuit board body 1, and each covered electrical component 111 is located as a whole in the projection area 11 of the corresponding transparent through hole; some electrical components 111 are connected through soldering pads, and the soldering pads and the electrical components 111 connected through the soldering pads are located as a whole in the projection area 11 of the same transparent through hole 211.

[0066] The first adhesive layer 23 has adhesive through holes 231 at positions opposite to each transparent through hole 211 , and the adhesive through holes 231 are connected to the corresponding transparent through holes 211 , so that the area on the insulating tape 221 corresponding to the transparent through holes 211 will not be blocked by the first adhesive layer 23 .

[0067] by Figure 2 For example, three perspective through holes 211 are arranged at intervals on the shielding layer 21, and the three perspective through holes 211 respectively form corresponding projection areas 11 on the circuit board body 1, and at least one electrical component 111 is arranged in each projection area 11. Among them, one electrical component 111 is arranged in the projection area 11 located on the left, and two electrical components 111 are arranged in the projection areas 11 located in the middle and on the right. The insulating layer 22 specifically adopts a whole sheet of insulating tape 221, and covers all the electrical components 111 corresponding to the three perspective through holes 211 at the same time.

[0068] like Figure 8In the example, the display screen 31 has a backlight assembly 311, and the backlight assembly 311 is arranged corresponding to the side of the circuit board body 1 away from the electromagnetic shielding assembly 2; the surface of the circuit board body 1 away from the electromagnetic shielding assembly 2 is provided with a second adhesive layer 312, and the circuit board body 1 is bonded and connected to the backlight assembly 311 of the display screen 31 through the second adhesive layer 312 to achieve the connection and fixation between the circuit board assembly 100 and the display screen 31. In actual applications, the electrical components 111 on the circuit board body 1 can be electrically connected to the backlight assembly 311 and the display screen 31 to achieve the transmission of electrical signals.

[0069] In this embodiment, the insulating tape 221 and the shielding layer 21 are an integrated structure, which is easy to process and can be pasted at one time during the assembly process, which is conducive to improving production efficiency; the electromagnetic shielding effect of the shielding layer 21 prevents the electrical components 111 on the circuit board body 1 from being subjected to electromagnetic interference, and the insulating tape 221 plays an insulating isolation role between the shielding layer 21 and the electrical components 111. After the assembly is completed, not only can the insulating tape 221 be visually inspected through the perspective through hole 211, but also the perspective detection equipment can be used to emit detection rays to the circuit board body 1 through the perspective through hole 211 to perform perspective detection on the electrical components 111 and the corresponding pads to ensure the process quality of the electrical components 111 and the pads.

[0070] The insulating tape 221 is made of colored tape, and can be distinguished from other surrounding parts by the color of the insulating tape 221, thereby enhancing the visibility of the insulating tape 221 and making it easier to visually observe the insulating tape 221.

[0071] The electromagnetic shielding assembly used in the electronic device in this embodiment can effectively solve the problem in the prior art that the insulation tape is not easily inspected visually or by machine vision, reduce the risk of short circuits between the shielding layer and the electrical components and solder joints on the circuit board body, and cause product malfunctions, and overcome the problem in the prior art that the shielding layer absorbs X-rays, making it difficult for X-ray fluoroscopic inspection equipment to perform fluoroscopic inspections on electrical components and pads. Moreover, the electromagnetic shielding assembly has a simple structure and is easy to assemble, which can greatly reduce the possibility of missing the insulation tape during manual assembly operations, and is particularly suitable for consumer electronic products with small assembly spaces.

[0072] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A circuit board assembly, characterized in that: include: A circuit board body, wherein a plurality of electrical components are arranged on the circuit board body; and an electromagnetic shielding assembly, the electromagnetic shielding assembly being arranged corresponding to the plurality of electrical components, the electromagnetic shielding assembly comprising a shielding layer and an insulating layer, the insulating layer being fixedly arranged on a side of the shielding layer facing the circuit board body, the electromagnetic shielding assembly being fixedly connected to the circuit board body, and the insulating layer covering at least one of the electrical components; Among them, a transparent through hole is opened on the shielding layer at a position opposite to each covered electrical component, each of the transparent through holes forms a projection area on the circuit board body, and at least part of the structure of each covered electrical component is located in the corresponding projection area.

2. The circuit board assembly according to claim 1, characterized in that: At least one of the covered electrical components is entirely located within the corresponding projection area.

3. The circuit board assembly according to claim 2, characterized in that: At least two of the electrical components are connected via a pad, wherein the pad and the at least two electrical components connected via the pad are integrally located within the corresponding projection area.

4. The circuit board assembly according to claim 1, characterized in that: The insulating layer includes at least one insulating adhesive tape; A first adhesive layer is provided on a surface of the shielding layer facing the insulating tape, and the insulating tape is bonded to the shielding layer via the first adhesive layer; and / or The circuit board body is a flexible circuit board, and the electromagnetic shielding component is a flexible shielding structure.

5. The circuit board assembly according to claim 4, characterized in that: The insulating tape is a colored tape; and / or An adhesive layer through hole is provided on the first adhesive layer at a position opposite to the transparent through hole, and the adhesive layer through hole is connected to the corresponding transparent through hole.

6. The circuit board assembly according to claim 1, characterized in that: One insulating layer covers the electrical components corresponding to a plurality of the transparent through holes at the same time; or The insulating layer includes a plurality of insulating sub-units, and each of the insulating sub-units covers the electrical component corresponding to at least one of the transparent through holes.

7. An electromagnetic shielding component, characterized in that: include: A shielding layer, wherein a plurality of transparent through holes are formed on the shielding layer; and an insulating layer, the insulating layer being fixedly disposed on one side of the shielding layer; Wherein, the insulating layer can cover at least one electrical component on the circuit board body, and each of the transparent through holes can form a projection area on the circuit board body, so that at least a part of the structure of each covered electrical component is located within the projection area.

8. The electromagnetic shielding assembly according to claim 7, characterized in that: The insulating layer includes at least one insulating adhesive tape; A first adhesive layer is provided on the surface of the shielding layer facing the insulating tape, and the insulating tape is bonded and connected to the shielding layer via the first adhesive layer; or One insulating layer covers a plurality of electrical components at the same time; or The insulating layer includes a plurality of insulating subunits, and each of the insulating subunits covers at least one of the electrical components.

9. The electromagnetic shielding assembly according to claim 8, characterized in that: The insulating tape is a colored tape; and / or An adhesive layer through hole is provided on the first adhesive layer at a position opposite to the transparent through hole, and the adhesive layer through hole is connected to the corresponding transparent through hole; and / or The electromagnetic shielding component is a flexible shielding structure.

10. An electronic device, characterized in that: include: A display screen having a backlight assembly; According to the circuit board assembly as claimed in any one of claims 1 to 6, a side of the circuit board body of the circuit board assembly away from the electromagnetic shielding assembly is connected to the backlight assembly.

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