Circuit board assembly and electronic equipment

Abstract

The utility model discloses a circuit board assembly and electronic equipment, and relates to the technical field of electronic equipment, the circuit board assembly comprises a circuit board, a shielding cover, a conductive copper foil and a fixing piece, the circuit board is provided with a functional part, the shielding cover is arranged on the circuit board, the functional part is accommodated in the shielding cover, one side, deviating from the circuit board, of the shielding cover is provided with an open hole, and the conductive copper foil is arranged in the open hole; the conductive copper foil is arranged on the shielding cover and covers the opening. The fixing piece is arranged on the shielding cover, a part of the fixing piece covers the conductive copper foil, and the circumferential edge of the conductive copper foil is located between the fixing piece and the shielding cover.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly relates to a circuit board assembly and an electronic device. Background Art

[0002] Conductive copper foil has excellent electrical conductivity and electromagnetic shielding performance, and plays an important role inside a mobile phone. When a conductive copper foil is installed on a shielding cover of a circuit board, the conductive copper foil can perform electromagnetic shielding on functional components on the circuit board.

[0003] Limited by factors such as the flatness and surface roughness of the shielding cover itself, there are risks of edge warping and crosstalk when the conductive copper foil is adhered to the shielding cover, which affects the electromagnetic shielding performance of the conductive copper foil. Summary of the Utility Model

[0004] This application aims to provide a circuit board assembly and an electronic device, and at least solve the problem that after the conductive copper foil is adhered to the shielding cover in the related art, there are risks of edge warping and crosstalk, thereby affecting the electromagnetic shielding performance of the conductive copper foil.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of this application provides a circuit board assembly, including:

[0007] A circuit board, on which functional components are provided;

[0008] A shielding cover, disposed on the circuit board, the functional components are accommodated in the shielding cover, and an opening is provided on a side of the shielding cover facing away from the circuit board;

[0009] A conductive copper foil, disposed on the shielding cover, and the conductive copper foil covers the opening;

[0010] A fixing member, disposed on the shielding cover, a part of the fixing member covers the conductive copper foil, and the circumferential edge of the conductive copper foil is located between the fixing member and the shielding cover.

[0011] In a second aspect, an embodiment of this application provides an electronic device, including:

[0012] The circuit board assembly as in the first aspect.

[0013] In an embodiment of the present application, after the conductive copper foil is assembled to the shielding cover, a fixing member is fixed to the shielding cover, and a part of the fixing member is attached to the conductive copper foil, so that a part of the conductive copper foil is located between the fixing member and the shielding cover. In this embodiment, at least a part of the fixing member is attached to the circumferential edge of the conductive copper foil, and the fixing member limits the circumferential edge of the conductive copper foil, so that the circumferential edge of the conductive copper foil can be firmly attached to the shielding cover, the problem that the circumferential edge of the conductive copper foil is not easy to warp is solved, and the conductive copper foil is not easy to move relative to the shielding cover, ensuring that the conductive copper foil can play a stable electromagnetic shielding function.

[0014] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 is one of the exploded views of the circuit board assembly according to an embodiment of the present application;

[0017] Figure 2 is another exploded view of the circuit board assembly according to an embodiment of the present application;

[0018] Figure 3 is one of the top views of the circuit board assembly according to an embodiment of the present application;

[0019] Figure 4 shows Figure 3 a cross-sectional view taken along the A-A direction in

[0020] Figure 5 is one of the partial schematic diagrams of the circuit board assembly according to an embodiment of the present application;

[0021] Figure 6 is the third exploded view of the circuit board assembly according to an embodiment of the present application;

[0022] Figure 7 is the second top view of the circuit board assembly according to an embodiment of the present application;

[0023] Figure 8 shows Figure 7 a cross-sectional view taken along the B-B direction in

[0024] Figure 9 is the second partial schematic diagram of the circuit board assembly according to an embodiment of the present application;

[0025] Figure 10 is one of the structural schematic diagrams of the fixing member according to an embodiment of the present application;

[0026] Figure 11 It is the second structural schematic diagram of the fixing part according to the embodiment of the present application;

[0027] Figure 12 It is the first structural schematic diagram of the shielding cover according to the embodiment of the present application;

[0028] Figure 13 It is the second structural schematic diagram of the shielding cover according to the embodiment of the present application;

[0029] Figure 14 It is the third partial schematic diagram of the circuit board assembly according to the embodiment of the present application;

[0030] Figure 15 It is the fourth partial schematic diagram of the circuit board assembly according to the embodiment of the present application;

[0031] Figure 16 It is the fifth partial schematic diagram of the circuit board assembly according to the embodiment of the present application;

[0032] Figure 17 It is the sixth partial schematic diagram of the circuit board assembly according to the embodiment of the present application;

[0033] Figure 18 It is the partial schematic diagram of the fixing part body according to the embodiment of the present application.

[0034] Reference numerals:

[0035] 100 Circuit board assembly, 110 Circuit board, 120 Functional component, 130 Shielding cover, 131 Opening, 132 Side wall, 133 Top wall, 134 Buckling hole, 140 Conductive copper foil, 150 Fixing part, 151 Positioning hole, 152 First fixing part, 153 Second fixing part, 154 Buckling part, 155 Fixing part body, 156 Flexible support member, 157 Limiting groove, 160 Gap, 170 Adhesive. Detailed implementation manners

[0036] Hereinafter, embodiments of the present application will be described in detail. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary only for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0037] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0039] The following Figures 1 - 18 describes a circuit board assembly and an electronic device according to an embodiment of this application.

[0040] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, according to some embodiments of this application, the circuit board assembly 100 includes: a circuit board 110, a shielding cover 130, a conductive copper foil 140, and a fixing member 150. A functional component 120 is provided on the circuit board 110. The shielding cover 130 is disposed on the circuit board 110, the functional component 120 is received in the shielding cover 130, the shielding cover 130 is snapped onto the functional component 120, an opening 131 is provided on a side of the shielding cover 130 facing away from the circuit board 110, the conductive copper foil 140 is disposed on the shielding cover 130, and the conductive copper foil 140 covers the opening 131. The fixing member 150 is disposed on the shielding cover 130, a part of the fixing member 150 covers the conductive copper foil 140, and the circumferential edge of the conductive copper foil 140 is located between the fixing member 150 and the shielding cover 130.

[0041] The shielding cover 130 is installed on the circuit board 110. For example, the shielding cover 130 is fixed to the circuit board 110 by means such as bonding or welding, and the shielding cover 130 is snapped onto the functional component 120 in the circuit board 110, so that the shielding cover 130 can play a role in shielding part of the electromagnetic waves of the functional component 120. An opening 131 is usually provided on the shielding cover 130, and the conductive copper foil 140 is covered on the opening 131, so that the shielding cover 130 and the conductive copper foil 140 jointly achieve the function of shielding electromagnetic waves.

[0042] After the conductive copper foil 140 is assembled to the shielding cover 130, the fixing member 150 is fixed on the shielding cover 130, and a part of the fixing member 150 is attached to the conductive copper foil 140, so that a part of the conductive copper foil 140 is located between the fixing member 150 and the shielding cover 130. In this embodiment, at least a part of the fixing member 150 is attached to the circumferential edge of the conductive copper foil 140, and the fixing member 150 limits the circumferential edge of the conductive copper foil 140, so that the circumferential edge of the conductive copper foil 140 can be firmly attached to the shielding cover 130, the problem that the circumferential edge of the conductive copper foil 140 is not easy to warp, and the conductive copper foil 140 is not easy to move relative to the shielding cover 130, ensuring that the conductive copper foil 140 can play a stable electromagnetic shielding function.

[0043] Combined with Figure 2 and Figure 3 As shown, in some embodiments, optionally, the fixing member 150 includes an annular fixing member, and the annular fixing member is distributed along the circumferential direction of the conductive copper foil 140 ( Figure 1 the arrow direction at C in

[0044] The fixing member 150 is of an annular structure, and the fixing member 150 is attached to the circumferential edge of the conductive copper foil 140. Therefore, the fixing member 150 can limit the circumferential edge of the conductive copper foil 140 to prevent the problem of warping at any point on the circumferential edge of the conductive copper foil 140, and ensure the fitting effect between the conductive copper foil 140 and the shielding cover 130.

[0045] After the conductive copper foil 140 is attached to the shielding cover 130, the circumferential edge of the conductive copper foil 140 is prone to warping. When the circumferential edge of the conductive copper foil 140 is limited by the fixing member 150, the middle part of the conductive copper foil 140 is not easy to warp. Therefore, it is not necessary to limit the middle part of the conductive copper foil 140. In this case, the fixing member 150 is set to an annular structure, so that the middle part of the fixing member 150 is a hole-shaped structure, which can reduce the weight of the fixing member 150, thereby reducing the overall weight of the circuit board assembly 100. Moreover, it can also reduce the material consumption of the fixing member 150, thereby reducing the processing cost of the circuit board assembly 100.

[0046] Combined with Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, optionally, a part of the fixing member 150 is attached to the conductive copper foil 140, and another part of the fixing member 150 is bonded to the shielding cover 130.

[0047] In this embodiment, it is defined that the fixing member 150 is fixed to the shielding cover 130 by adhesion. The fixing member 150 has a certain rigidity, so the fixing member 150 is not easily deformed, enabling the fixing member 150 to stably limit the circumferential edge of the conductive copper foil 140. A part of the fixing member 150 is adhered to the shielding cover 130, and another part of the fixing member 150 is attached to the conductive copper foil 140. The fixing member 150 is stably fixed to the shielding cover 130 through the adhesive 170, making the position of the fixing member 150 relative to the shielding cover 130 not easily change, thereby ensuring that the fixing member 150 can stably abut against the conductive copper foil 140 and further stably limit the conductive copper foil 140.

[0048] Exemplarily, the fixing member 150 in this embodiment is PET (Polyethylene terephthalate), and in actual projects, the PET shape structure can be flexibly designed according to the shapes of the shielding cover 130 and the conductive copper foil 140. In this embodiment, the PET is attached to the shielding cover 130 through double-sided tape, forming a pre-pressing structure around the conductive copper foil 140 to reduce the risk of warping and crosstalk.

[0049] As Figure 2 shown, in some embodiments, optionally, a plurality of positioning holes 151 are provided on the fixing member 150 for cooperation with a jig.

[0050] A plurality of positioning holes 151 are machined on the fixing member 150. When installing the fixing member 150, a jig can be used to pass through the positioning holes 151, and then the fixing member 150 is attached to the surfaces of the conductive copper foil 140 and the shielding cover 130 through the jig. By providing the positioning holes 151 on the fixing member 150, it is beneficial to improve the installation convenience of the fixing member 150.

[0051] Combined with Figure 6 、 Figure 7 and Figure 8 shown, in some embodiments, optionally, a part of the fixing member 150 is attached to the conductive copper foil 140, and another part of the fixing member 150 is buckled with the shielding cover 130.

[0052] When the fixing member 150 is installed on the shielding cover 130 by buckling, a part of the fixing member 150 is attached to the shielding cover 130. The fixing member 150 is buckled with the shielding cover 130, making the position of the fixing member 150 relative to the shielding cover 130 not easily change, thereby ensuring that the fixing member 150 can stably abut against the conductive copper foil 140 and further stably limit the conductive copper foil 140.

[0053] Combined with Figure 9 、 Figure 10 、Figure 11 , Figure 12 and Figure 13 As shown in Figure 13 , in some embodiments, optionally, the shielding cover 130 includes a side wall 132 and a top wall 133. The side wall 132 is disposed on the circuit board 110, the top wall 133 is connected to the side wall 132, and the conductive copper foil 140 is disposed on the top wall 133. The fixing member 150 includes: a first fixing portion 152 and a second fixing portion 153. The first fixing portion 152 is disposed opposite to the top wall 133, and a part of the first fixing portion 152 is attached to the conductive copper foil 140. The second fixing portion 153 is connected to the first fixing portion 152, the second fixing portion 153 is disposed opposite to the side wall 132, and a fastening portion 154 is provided on one of the second fixing portion 153 and the side wall 132, and a fastening hole 134 is provided on the other, and the fastening portion 154 is fastened into the fastening hole 134.

[0054] The top wall 133 in the shielding cover 130 is connected to the side wall 132 in the shielding cover 130. The side wall 132 raises the top wall 133 above the functional component 120 so that there is no interference between the top wall 133 and the functional component 120.

[0055] The second fixing portion 153 is disposed opposite to the side wall 132. The second fixing portion 153 is mounted on the side wall 132 through a fastening structure. The first fixing portion 152 is connected to the second fixing portion 153, and the first fixing portion 152 is disposed opposite to the top wall 133, so that the first fixing portion 152 can be attached to the conductive copper foil 140. The fastening structure between the fixing member 150 and the shielding cover 130 is disposed on their respective side portions. Therefore, the fastening structure does not occupy the space at the top of the shielding cover 130, avoiding the problem of excessive thickness of the circuit board assembly 100.

[0056] In this embodiment, the fastening portion 154 is provided on the second fixing portion 153, and the fastening hole 134 is provided on the side wall 132. In other embodiments, the fastening hole 134 can also be provided on the second fixing portion 153, and the fastening portion 154 can be provided on the side wall 132.

[0057] Combined with Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown in Figure 13 , in some embodiments, optionally, the number of both the side wall 132 and the second fixing portion 153 is multiple. One second fixing portion 153 is disposed opposite to one side wall 132, and adjacent two second fixing portions 153 are spaced apart.

[0058] There are multiple side walls 132 in the shielding cover 130. In order to ensure that the fixing member 150 and the shielding cover 130 can be stably connected, there are also multiple second fixing parts 153 in the fixing member 150. A second fixing part 153 is correspondingly arranged on each side wall 132, so that there are multiple connection points between the fixing member 150 and the shielding cover 130.

[0059] When the second fixing portion 153 is mounted on the side wall 132, the second fixing portion 153 needs to be moved so that the second fixing portion 153 is deformed relative to the first fixing portion 152 to a certain extent, so that the buckle portion 154 can be buckled into the buckle hole 134. Two adjacent second fixing portions 153 are arranged at intervals, that is, there is no connection between the two adjacent second fixing portions 153. When one second fixing portion 153 is moved, the adjacent second fixing portion 153 will not hinder the currently moved second fixing portion 153, thereby improving the installation convenience of the second fixing portion 153 and reducing the installation difficulty of the second fixing portion 153.

[0060] The outer shape structure of the fixing member 150 can be flexibly designed according to the outer shapes of the shielding cover 130 and the conductive copper foil 140 .

[0061] In this embodiment, three buckling parts 154 are provided on a second fixing part 153, and three buckling holes 134 are provided on a side wall 132. In other embodiments, the number of buckling parts 154 and buckling holes 134 can be adjusted according to actual project requirements.

[0062] Combination Figure 14 , Figure 15 and Figure 16 As shown, in some embodiments, optionally, the fixing member 150 includes a fixing member body 155 and a flexible support member 156, the fixing member body 155 is buckled with the shielding cover 130, the flexible support member 156 is located between the fixing member body 155 and the conductive copper foil 140, the flexible support member 156 is attached to the conductive copper foil 140, and the flexible support member 156 is in a deformed state.

[0063] When the fixing member 150 is installed on the shielding cover 130, the fixing member body 155 is connected to the shielding cover 130, and a part of the flexible support member 156 is arranged between the fixing member body 155 and the conductive copper foil 140. The fixing member body 155 presses the conductive copper foil 140 through the flexible support member 156 to prevent the circumferential edge of the conductive copper foil 140 from warping.

[0064] When there is an assembly tolerance between the shielding cover 130 , the fixing member 150 and the circuit board 110 , a gap 160 may exist between the shielding cover 130 and the conductive copper foil 140 in the Z direction, and the conductive copper foil 140 may have a hidden danger of insufficient pre-compression.

[0065] To solve the problem of the gap caused by the accumulation of tolerances, in this embodiment, a layer of flexible support member 156 is mounted in the gap 160 between the shielding cover 130 and the fixing member body 155. The flexible support member 156 is soft in texture. Under the extrusion of the fixing member body 155, the flexible support member 156 can deform, so that the flexible support member 156 is in a deformed state. After the fixing member 150 is installed, the deformed flexible support member 156 can tightly adhere to the conductive copper foil 140. Furthermore, the flexible support member 156 can meet the requirement of pre-pressing the conductive copper foil 140 even under the maximum gap condition.

[0066] Exemplarily, the flexible support member 156 can be foam, rubber or silica gel.

[0067] The shape of the flexible support member 156 can be in a shape such as a square frame or a door shape according to the actual project design.

[0068] In some embodiments, optionally, the flexible support member 156 includes a conductive support member or a non-conductive support member.

[0069] The flexible support member 156 can be designed as a conductive support member or a non-conductive support member according to the actual project requirements. When there is a cavity structure between the fixing member 150 and the shielding cover 130, there may be resonance waves inside the cavity structure. To eliminate the influence of the resonance waves, a conductive support member can be used to fill the space between the fixing member 150 and the shielding cover 130. When it is determined that there are no resonance waves or the resonance waves are weak in the spatial structure, a non-conductive support member can also be selected to fill the space between the fixing member 150 and the shielding cover 130.

[0070] Combined Figure 17 and Figure 18 As shown, in some embodiments, optionally, a limiting groove 157 is provided on the fixing member body 155, and a part of the flexible support member 156 extends into the limiting groove 157.

[0071] At least a part of the flexible support member 156 is located between the fixing member body 155 and the conductive copper foil 140. When the electronic device drops or is impacted, the flexible support member 156 may move around under the action of vibration, resulting in unstable pre-pressing of the flexible support member 156 on the conductive copper foil 140. Therefore, in this embodiment, it is defined that a limiting groove 157 is provided on the fixing member body 155, and a part of the flexible support member 156 is embedded in the limiting groove 157. The limiting groove 157 positions the flexible support member 156. Even if the flexible support member 156 is affected by vibration, the flexible support member 156 is not likely to move relative to the conductive copper foil 140, realizing the positioning of the flexible support member 156 in the XYZ directions and ensuring stable pre-pressing of the flexible support member 156 on the conductive copper foil 140.

[0072] In an embodiment of the present application, an electronic device is provided, which includes the circuit board assembly in any of the above embodiments. The electronic device in this embodiment can achieve the technical effects of the circuit board assembly in any of the above embodiments, which will not be elaborated here.

[0073] In a possible application, the electronic device can be any one of a mobile phone, a tablet computer, a camera, an e-book, and a smart wearable device.

[0074] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0075] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A circuit board assembly, characterized in that: include: A circuit board, wherein functional components are arranged on the circuit board; A shielding cover is arranged on the circuit board, the functional components are accommodated in the shielding cover, and an opening is arranged on a side of the shielding cover away from the circuit board; A conductive copper foil is disposed on the shielding cover, and the conductive copper foil covers the opening; A fixing member is arranged on the shielding cover, a part of the fixing member covers the conductive copper foil, and a peripheral edge of the conductive copper foil is located between the fixing member and the shielding cover.

2. The circuit board assembly according to claim 1, characterized in that: The fixing member includes an annular fixing member, and the annular fixing member is distributed along the circumference of the conductive copper foil.

3. The circuit board assembly according to claim 1 or 2, characterized in that: A portion of the fixing member is attached to the conductive copper foil, and another portion of the fixing member is bonded to the shielding cover.

4. The circuit board assembly according to claim 1 or 2, characterized in that: The fixing piece is provided with a plurality of positioning holes, and the positioning holes are used to cooperate with the fixture.

5. The circuit board assembly according to claim 1 or 2, characterized in that: A portion of the fixing member is attached to the conductive copper foil, and another portion of the fixing member is buckled with the shielding cover.

6. The circuit board assembly according to claim 5, characterized in that: The shielding cover comprises: A side wall, disposed on the circuit board; A top wall connected to the side wall, the conductive copper foil being arranged on the top wall; The fixing member comprises: A first fixing portion, arranged opposite to the top wall, a portion of the first fixing portion being attached to the conductive copper foil; The second fixing part is connected to the first fixing part, and the second fixing part is arranged opposite to the side wall. A buckling part is provided on one of the second fixing part and the side wall, and a buckling hole is provided on the other, and the buckling part is buckled into the buckling hole.

7. The circuit board assembly according to claim 6, characterized in that: There are multiple side walls and multiple second fixing portions, one second fixing portion is arranged opposite to one side wall, and two adjacent second fixing portions are arranged at intervals.

8. The circuit board assembly according to claim 5, characterized in that: The fixing member comprises: A fixing body, buckled with the shielding cover; The flexible support member is located between the fixing member body and the conductive copper foil, and the flexible support member is attached to the conductive copper foil.

9. The circuit board assembly according to claim 8, characterized in that: The fixing member body is provided with a limiting groove, and a part of the flexible supporting member extends into the limiting groove.

10. An electronic device, characterized in that: include: A circuit board assembly as claimed in any one of claims 1 to 9.

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