Circuit board assembly and electronic device

Abstract

The embodiment of the application provides a kind of circuit board assembly and electronic equipment, it is related to terminal technical field.The circuit board assembly includes circuit board and pre-fixing piece.Circuit board includes first side and second side, first side and second side are respectively located in the thickness direction of two sides of circuit board.Pre-fixing piece includes fixed connection section, abutting section and elastic bending section, bending section is between fixed connection section and abutting section, two ends of bending section are connected with fixed connection section and abutting section respectively, fixed connection section, bending section and abutting section are arranged along first direction, first direction is perpendicular to the thickness direction of circuit board.Fixed connection section is fixedly connected to first side, at least part of bending section and abutting section extend out of circuit board along first direction.In this way, it is convenient to realize the disassembly of circuit board after pre-fixing circuit board and middle frame.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a circuit board assembly and an electronic device. Background Technology

[0002] Electronic devices such as mobile phones and tablets often include circuit boards and mid-frames. During the assembly process, the circuit boards and mid-frames need to be pre-fixed first, and then the circuit boards and mid-frames are finally fixed.

[0003] The middle frame includes a fixed frame, a middle plate, and a retaining wall, with the retaining wall protruding from the inner wall of the fixed frame. In related technologies, a pre-fixing member, which is fixedly connected to the circuit board, is often inserted between the retaining wall and the middle plate by bending the circuit board. The pre-fixing member abuts against the retaining wall to pre-fix the circuit board to the middle frame.

[0004] However, in related technologies, once the circuit board is pre-fixed, disassembly is quite difficult. Utility Model Content

[0005] This application provides a circuit board assembly and an electronic device that facilitates the disassembly of the circuit board after it has been pre-fixed to the middle frame.

[0006] A first aspect of this application provides a circuit board assembly, which includes a circuit board and a pre-fixing piece. The circuit board includes a first side and a second side, which are located on opposite sides of the circuit board's thickness direction. The pre-fixing piece includes a fixed connecting section, an abutting section, and an elastically bent section. The bent section is located between the fixed connecting section and the abutting section, and its two ends are connected to the fixed connecting section and the abutting section, respectively. The fixed connecting section, the bent section, and the abutting section are arranged along a first direction, which is perpendicular to the thickness direction of the circuit board. The fixed connecting section is fixedly connected to the first side, and at least a portion of the bent section and the abutting section extend out of the circuit board along the first direction.

[0007] The circuit board assembly provided in this application embodiment has a sheet-like structure for the fixed connection section, the abutment section, and the bending section. The bending section, being a bent sheet structure, has low stiffness and is prone to elastic deformation. When pre-fixing the circuit board to the middle frame is required, the abutment section can be inserted between the retaining wall and the middle plate by causing the bending section to elastically deform. The abutment between the abutment section and the retaining wall achieves pre-fixation of the circuit board to the middle frame. During the pre-fixation process, the circuit board does not need to be bent, facilitating the pre-fixation of a circuit board with higher stiffness and reducing restrictions on the selection of circuit boards for electronic devices. Furthermore, after the circuit board is pre-fixed, the abutment section can be moved out from between the retaining wall and the middle plate by causing the bending section to elastically deform, thereby releasing the pre-fixation of the circuit board to the middle frame. This makes disassembling the circuit board more convenient and facilitating maintenance. Additionally, the sheet-like abutment section is relatively easy to insert and exit between the retaining wall and the middle plate, making the pre-fixation and disassembly of the circuit board to the middle frame easier and more convenient. Furthermore, at least a portion of the bent section and the abutting section extend from the circuit board in the first direction, making it less likely for the circuit board to interfere with the bent section and the abutting section when the bent section deforms, and the circuit board less likely to obstruct the deformation of the bent section and the displacement of the abutting section.

[0008] In one possible implementation, the bent section bends away from the second side relative to the fixed connecting section and the abutting section, making the bent section less likely to affect the layout of the circuit board. Furthermore, after the circuit board is pre-fixed, it is also convenient to move the bent section away from the second side, allowing the abutting section to be moved out from between the retaining wall and the middle plate, making it easier and more convenient to disassemble the circuit board.

[0009] In one possible implementation, the bending segment includes a first sub-segment and a second sub-segment. One end of the first sub-segment is connected to one end of the second sub-segment, forming an angle between them. The other end of the first sub-segment is connected to one end of a fixed connecting segment, forming an obtuse angle between them. The other end of the second sub-segment is connected to one end of an abutting segment, forming an obtuse angle between them.

[0010] In this way, it is easier for the bending section to undergo elastic deformation that causes the abutment section to expand and contract along the first direction, making it easier for the abutment section to pass through the retaining wall and the middle plate. In addition, the bending section has a simpler structure and is easier to form.

[0011] In one possible implementation, the first sub-segment and the second sub-segment form an acute angle structure.

[0012] In this way, compared to the obtuse angle structure formed by the first and second sub-segments, the bending segment facilitates the elastic deformation that causes the abutment segment to expand and contract along the first direction. Furthermore, the smaller size of the bending segment in the first direction makes it easier to implement in scenarios with limited space.

[0013] In one possible implementation, at least a portion of the first sub-segment and the second sub-segment extend out of the circuit board along a first direction.

[0014] In this way, the circuit board is less likely to obstruct the deformation of the bending section and the displacement of the abutment section, and the abutment section can easily pass through the retaining wall and the middle plate.

[0015] In one possible implementation, the fixed connecting section, the bending section, and the abutment section are integrated into a single structure.

[0016] In this way, the connection strength between the bent section and the fixed connection section and the abutment section is good, and the connection is not easily damaged, which is conducive to the long-term and repeated use of the pre-fixed piece. In addition, the pre-fixed piece does not need to be connected to the bent section and the fixed connection section and the abutment section through welding or other processes. The pre-fixed piece is easier to form and can be made in smaller sizes, which is conducive to its use in compact scenarios.

[0017] In one possible implementation, the pre-fixing sheet has a perforated structure extending through both sides of the pre-fixing sheet in the thickness direction. At least a portion of the perforated structure is located in the bent section.

[0018] In this way, the rigidity of the bending section can be reduced through the perforated structure, making it easier for the bending section to undergo elastic deformation. This makes it easier for the connecting section to pass through between the retaining wall and the middle plate, facilitating the pre-fixing and disassembly of the circuit board and the middle frame.

[0019] In one possible implementation, the perforated structure extends through one end of the bent section connecting to the fixed connecting section and one end of the bent section connecting to the abutting section.

[0020] In this way, the perforated structure is effective in reducing the stiffness of the bent section, and the bent section is more likely to undergo elastic deformation.

[0021] In one possible implementation, the perimeter of the hole structure is a closed structure.

[0022] In this way, the overall structure of the pre-fixed piece is stable and has good reliability.

[0023] In one possible implementation, the thickness of the circuit board is greater than or equal to 0.7 mm.

[0024] In this way, the thickness of the circuit board is relatively large, which can reduce the mutual influence between the devices arranged on the first side and the devices arranged on the second side, which is conducive to increasing the arrangement density of devices in electronic devices and thus improving the space utilization rate of electronic devices.

[0025] In one possible implementation, the circuit board assembly further includes an antenna structure and electronic components. The antenna structure is located on one of the first and second sides, while the electronic components are located on the other side. After the circuit board is pre-fixed to the mid-frame via pre-fixing tabs, the electronic device has fewer restrictions on the choice of circuit board. A thicker circuit board can be selected to meet the clearance requirements of the antenna structure, allowing the antenna structure and electronic components to be arranged on the first and second sides respectively. This results in a higher component density and better space utilization within the electronic device.

[0026] In one possible implementation, the thickness of the pre-fixed sheet is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0027] In this way, the pre-fixing plate is easier to manufacture and thinner, making it easier for the bending section to undergo elastic deformation and for the abutting section to pass through the retaining wall and the middle plate.

[0028] In one possible implementation, the dimension of the bent segment in the thickness direction of the circuit board is greater than or equal to 0.6 mm and less than or equal to 1.2 mm.

[0029] In this way, while the space occupied by the bending section in the thickness direction of the circuit board is small, it is easier for the bending section to undergo elastic deformation.

[0030] In one possible implementation, the dimension of the abutment segment in the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0031] In this way, while ensuring a relatively stable connection between the abutment section and the retaining wall, the abutment section occupies less space in the first direction, which is conducive to arranging the abutment section in a more compact space and can make higher space utilization for electronic equipment.

[0032] A second aspect of this application provides an electronic device, which includes a mid-frame and a circuit board assembly as described in any of the above embodiments. The mid-frame includes a fixed frame, a mid-plate, and a retaining wall. The fixed frame is fixedly connected to the mid-plate, and a mounting cavity is formed between the fixed frame and the mid-plate. The retaining wall is fixedly connected to the fixed frame and protrudes from the inner wall of the fixed frame. The circuit board assembly is disposed within the mounting cavity, and the retaining wall is located on the side of the circuit board assembly's abutment section away from the mid-plate, with the abutment section abutting against the retaining wall. Attached Figure Description

[0033] Figure 1 An exploded view of an electronic device provided in an embodiment of this application;

[0034] Figure 2A cross-sectional schematic diagram of an electronic device provided in an embodiment of this application;

[0035] Figure 3 A schematic diagram of a circuit board assembly provided in an embodiment of this application;

[0036] Figure 4 A schematic diagram of yet another circuit board assembly provided in an embodiment of this application;

[0037] Figure 5 A cross-sectional schematic diagram of another electronic device provided in an embodiment of this application;

[0038] Figure 6 A schematic diagram of yet another circuit board assembly provided in an embodiment of this application;

[0039] Figure 7 A cross-sectional schematic diagram of another electronic device provided in an embodiment of this application;

[0040] Figure 8 A schematic diagram of a pre-fixing sheet provided in an embodiment of this application;

[0041] Figure 9 for Figure 8 A schematic diagram of another perspective of the pre-fixed plate provided in the diagram;

[0042] Figure 10 for Figure 8 A schematic diagram of another perspective of the pre-fixed plate provided in the diagram;

[0043] Figure 11 This is a schematic diagram of another pre-fixing sheet provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Middle frame; 11. Fixed frame; 11a. First side frame; 11b. Second side frame; 12. Middle plate; 13. Retaining wall; 13a. First retaining part; 13b. Second retaining part; 20. Back cover; 30. Display screen; 40. Circuit board assembly; 50. Battery;

[0046] 100. Circuit board; 110. First side; 120. Second side;

[0047] 200. Pre-fixed piece; 210. Fixed connection section; 220. Bending section; 221. First sub-section; 222. Second sub-section; 230. Abutment section;

[0048] 300. Antenna structure;

[0049] 400. Electronic components;

[0050] 500. First fastener;

[0051] 600. Rigid pre-fixed components;

[0052] S, mounting cavity;

[0053] H1, Hole structure; H2, Connecting hole;

[0054] a) First direction; b) Second direction; c) Third direction. Detailed Implementation

[0055] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0056] This application provides an electronic device, which may include, but is not limited to, mobile phones, tablets, laptops, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, point-of-sale (POS) machines, personal digital assistants (PDAs), wearable devices, virtual reality devices, etc. The electronic device may be a foldable device, for example, a foldable mobile phone. The electronic device may also be a non-foldable device, for example, a candybar mobile phone. This application uses a candybar mobile phone as an example for illustration.

[0057] Figure 1 This is an exploded view of an electronic device provided in an embodiment of this application.

[0058] like Figure 1 As shown, the electronic device includes a middle frame 10, a back cover 20, a display screen 30, a battery 50, and a circuit board assembly 40. The back cover 20 and the display screen 30 are respectively attached to opposite sides of the middle frame 10. The middle frame 10, the back cover 20, and the display screen 30 enclose an installation space for mounting the device. The battery 50 and the circuit board assembly 40 are located within the installation space. Both the battery 50 and the circuit board assembly 40 are fixedly connected to the middle frame 10. The middle frame 10 can provide support, fixation, and protection for the battery 50 and the circuit board assembly 40. The battery 50 can be used to supply power to the circuit board assembly 40 and the display screen 30.

[0059] Of course, electronic devices may also include other components or devices, such as cameras, microphones, etc.

[0060] Figure 2This application provides a cross-sectional schematic diagram of an electronic device. In the figure, direction a is a first direction, direction b is a second direction, and direction c is a third direction. The first direction is perpendicular to the second direction, the first direction is perpendicular to the third direction, and the second direction is perpendicular to the third direction. The third direction is the thickness direction of the circuit board 100.

[0061] like Figure 2 As shown, the middle frame 10 includes a fixed frame 11 and a middle plate 12. The fixed frame 11 is fixedly connected to the middle plate 12, and a mounting cavity S is provided between the fixed frame 11 and the middle plate 12. The mounting cavity S is located within the mounting space, that is, the mounting cavity S is a part of the mounting space. The circuit board assembly 40 is disposed within the mounting cavity S. In some examples, the fixed frame 11 can be the edge of the middle frame 10, that is, the fixed frame 11 can be located at the edge of the middle plate 12. In other examples, the fixed frame 11 can also be other frame structures located within the edge of the middle frame 10.

[0062] like Figure 2 As shown, the circuit board assembly 40 includes a circuit board 100, which may include, but is not limited to, an antenna board, a sub-board, etc. This embodiment of the application uses an antenna board as an example for illustration.

[0063] To fix the circuit board 100, the middle frame 10 also includes a retaining wall 13, which is fixedly connected to the fixing frame 11. The retaining wall 13 protrudes from the inner wall of the fixing frame 11 and is located on the side of the circuit board assembly 40 away from the middle plate 12. The inner wall of the fixing frame 11 refers to the side wall of the fixing frame 11 used to enclose the mounting cavity S.

[0064] During the assembly of electronic devices, the circuit board 100 and the middle frame 10 need to be pre-fixed first, and then the circuit board 100 and the middle frame 10 need to be finally fixed.

[0065] To achieve pre-fixation between the circuit board 100 and the middle frame 10, in related technologies, the circuit board assembly also includes a rigid pre-fixing member, which is fixedly connected to the circuit board and extends beyond the edge of the circuit board. When it is necessary to pre-fix the circuit board to the middle frame, the pre-fixing member is inserted between the retaining wall and the middle plate by bending the circuit board. The pre-fixing member is used to abut against the retaining wall to pre-fix the circuit board to the middle frame.

[0066] However, in related technologies, once the circuit board is pre-fixed, disassembly is difficult, which is not conducive to the maintenance of the circuit board. In addition, when the circuit board has high rigidity, such as when the circuit board is thick, bending the circuit board is difficult, which in turn makes pre-fixing the circuit board more difficult, thus greatly limiting the selection of circuit boards for electronic devices.

[0067] like Figure 2As shown, based on this, in this embodiment of the application, the circuit board assembly 40 further includes a pre-fixing piece 200. The pre-fixing piece 200 includes a fixed connecting section 210, an abutting section 230, and an elastic bending section 220. The bending section 220 is located between the fixed connecting section 210 and the abutting section 230. Both ends of the bending section 220 are respectively connected to the fixed connecting section 210 and the abutting section 230. The fixed connecting section 210, the bending section 220, and the abutting section 230 are arranged along a first direction. The circuit board 100 includes a first side surface 110 and a second side surface 120. The first side surface 110 and the second side surface 120 are respectively located on both sides of the thickness direction of the circuit board 100. The fixed connecting section 210 is fixedly connected to the first side surface 110. At least a portion of the bending section 220 and the abutting section 230 extend out of the circuit board 100 along the first direction. That is, along the first direction, the entire abutting section 230 extends out of the circuit board 100, and at least a portion of the bending section 220 extends out of the circuit board 100.

[0068] Thus, the fixed connecting section 210, the abutting section 230, and the bending section 220 are all sheet-like structures. The bending section 220, being a bent sheet-like structure, has low stiffness and is prone to elastic deformation. When it is necessary to pre-fix the circuit board 100 to the middle frame 10, the abutting section 230 can be inserted between the retaining wall 13 and the middle plate 12 by causing the bending section 220 to undergo elastic deformation. The pre-fixation of the circuit board 100 to the middle frame 10 is achieved through the abutting of the abutting section 230 and the retaining wall 13.

[0069] Thus, during the pre-fixation process between the circuit board 100 and the middle frame 10, it is not necessary to bend the circuit board 100, which facilitates the pre-fixation of the circuit board 100 with greater rigidity and reduces the limitations on the selection of the circuit board 100 by electronic devices. Furthermore, after the circuit board 100 is pre-fixed, the abutment section 230 can be moved out from between the retaining wall 13 and the middle plate 12 by causing elastic deformation of the bent section 220, thereby releasing the pre-fixation between the circuit board 100 and the middle frame 10, making it easier to disassemble the circuit board 100 and facilitate maintenance. In addition, the sheet-like abutment section 230 easily inserts and exits between the retaining wall 13 and the middle plate 12, making the pre-fixation and disassembly between the circuit board 100 and the middle frame 10 easier and more convenient. Furthermore, at least a portion of the bent section 220 and the abutting section 230 extend from the circuit board 100 in the first direction, making it less likely that the circuit board 100 will interfere with the bent section 220 and the abutting section 230 when the bent section 220 is deformed. The circuit board 100 is less likely to hinder the deformation of the bent section 220 and the displacement of the abutting section 230.

[0070] For example, after the circuit board 100 is pre-fixed to the middle frame 10 by the pre-fixing piece 200, the retaining wall 13 is located on the side of the abutting section 230 away from the middle plate 12, and the abutting section 230 is used to abut against the retaining wall 13.

[0071] For example, the projection of the abutment section 230 along the thickness direction of the circuit board 100 is located outside the circuit board 100, so that the abutment section 230 can be inserted between the retaining wall 13 and the middle plate 12 to achieve the pre-fixation of the circuit board 100 and the middle frame 10.

[0072] For example, the projection of the abutment section 230 along the thickness direction of the circuit board 100 at least partially coincides with the projection of the retaining wall 13 along the thickness direction of the circuit board 100, so as to restrict the movement of the circuit board 100 away from the middle plate 12 by the abutment section 230 abutting against the retaining wall 13.

[0073] For example, the fixed connecting segment 210 is stacked on the first side surface 110. The projection of one end of the fixed connecting segment 210 connecting to the bent segment 220 along the thickness direction of the circuit board 100 can be located inside or outside the circuit board 100. That is, one end of the fixed connecting segment 210 connecting to the bent segment 220 can be recessed inside the circuit board 100 or extend outside the circuit board 100, so that at least a portion of the bent segment 220 extends out of the circuit board 100 along the first direction.

[0074] For example, a pre-fixing piece 200 is disposed at the end of the circuit board 100 in a first direction.

[0075] In some possible implementations, the fixed connection section 210, the bending section 220, and the abutment section 230 are an integral structure.

[0076] In this way, the connection strength between the bent section 220 and the fixed connecting section 210 and the abutting section 230 is good, and the connection is not easily damaged, which is conducive to the long-term and repeated use of the pre-fixing piece 200. In addition, the pre-fixing piece 200 does not need to be connected to the bent section 220 and the fixed connecting section 210 and the abutting section 230 through welding or other processes. The pre-fixing piece 200 is easier to form and can be made in a smaller size, which is conducive to its use in scenarios with limited space.

[0077] For example, the pre-fixing piece 200 may be a metal sheet to form an elastic bending section 220 between the fixed connection section 210 and the abutment section 230.

[0078] For example, the pre-fixing plate 200 can be a stainless steel plate, that is, the material of the pre-fixing plate 200 can be stainless steel, so that the pre-fixing plate 200 is not easily corroded, has a long service life, and is conducive to long-term and repeated use.

[0079] For example, the material of the pre-fixing plate 200 can be Fe, SUS301-H. That is to say, the material of the pre-fixing plate 200 is a high-strength stainless steel material with iron as the base and cold working hardening. This makes the pre-fixing plate 200 easy to process and low in cost, while the pre-fixing plate 200 as a whole can have good strength and hardness. The circuit board 100 is more firmly pre-fixed to the retaining wall 13 by the pre-fixing plate 200.

[0080] For example, the bent section 220 can be formed by a stamping process. Specifically, the middle part of the strip-shaped metal sheet can be stamped, causing the stamped part to deform and form the bent section 220, and the parts located on both sides of the bent section 220 respectively form the fixed connection section 210 and the abutment section 230.

[0081] like Figure 2 As shown, in some possible embodiments, the bent section 220 is bent away from the second side 120 relative to the fixed connecting section 210 and the abutting section 230, that is, the bent section 220 is bent away from the middle plate 12 relative to the fixed connecting section 210 and the abutting section 230.

[0082] In this way, the bending section 220 will not easily affect the arrangement of the circuit board 100. In addition, after the circuit board 100 is pre-fixed, it is also convenient to move the bending section 220 away from the second side 120 so that the abutment section 230 can be moved out from between the retaining wall 13 and the middle plate 12, making it easier and more convenient to disassemble the circuit board 100.

[0083] In some possible embodiments, the bent segment 220 includes a first sub-segment 221 and a second sub-segment 222. One end of the first sub-segment 221 is connected to one end of the second sub-segment 222, forming an angle between them. The other end of the first sub-segment 221 is connected to one end of the fixed connecting segment 210, forming an obtuse angle between them. The other end of the second sub-segment 222 is connected to one end of the abutting segment 230, forming an obtuse angle between them.

[0084] In this way, it is easier for the bent section 220 to undergo elastic deformation that causes the abutment section 230 to expand and contract in the first direction, making it easier for the abutment section 230 to pass through the retaining wall 13 and the middle plate 12. In addition, the structure of the bent section 220 is relatively simple and easier to form.

[0085] For example, after the circuit board 100 is pre-fixed by the pre-fixing piece 200, tweezers or other tools can be inserted between the first sub-segment 221 and the second sub-segment 222 and the connection between the first sub-segment 221 and the second sub-segment 222 can be moved to deform the bending segment 220, thereby allowing the abutting segment 230 to be moved out from between the retaining wall 13 and the middle plate 12.

[0086] For example, the angle structure formed by the first sub-segment 221 and the second sub-segment 222 protrudes from the fixed connection segment 210 and the abutment segment 230 in a direction away from the second side 120. That is, the angle structure formed by the first sub-segment 221 and the second sub-segment 222 protrudes from the fixed connection segment 210 and the abutment segment 230 in a direction away from the middle plate 12.

[0087] In some possible implementations, the first sub-segment 221 and the second sub-segment 222 form an acute angle structure.

[0088] In this way, compared to the obtuse angle structure formed by the first sub-segment 221 and the second sub-segment 222, it is easier for the bent segment 220 to undergo elastic deformation that causes the abutment segment 230 to expand and contract along the first direction. Furthermore, the smaller size of the bent segment 220 in the first direction facilitates its use in scenarios with limited space.

[0089] In some possible implementations, at least a portion of the first segment 221 and the second segment 222 extend out of the circuit board 100 along a first direction. That is, along the first direction, the second segment 222 extends entirely outside the circuit board 100, and at least a portion of the first segment 221 extends outside the circuit board 100.

[0090] In this way, the circuit board 100 is less likely to obstruct the deformation of the bending section 220 and the displacement of the abutment section 230, and the abutment section 230 can pass through the retaining wall 13 and the middle plate 12 more easily.

[0091] In some examples, the first segment 221 can extend entirely beyond the circuit board 100 along the first direction. That is, the bent portion can extend entirely beyond the circuit board 100 along the first direction.

[0092] In some possible implementations, the thickness of the circuit board 100 is L1, where L1 is greater than or equal to 0.7 mm.

[0093] In this way, the thickness of the circuit board 100 is relatively large, which can reduce the mutual influence between the devices arranged on the first side 110 and the devices arranged on the second side 120, which is conducive to increasing the arrangement density of devices in the electronic device and thus improving the space utilization rate of the electronic device.

[0094] For example, L1 can be 0.75 mm.

[0095] In some examples, the size of the circuit board 100 in the first direction is larger than the size of the circuit board 100 in the second direction. That is, the first direction is the length direction of the circuit board 100 and the second direction is the width direction of the circuit board 100, so that the circuit board 100 is more securely pre-fixed to the middle frame 10 through both ends in the first direction.

[0096] For example, the circuit board 100 may have a dimension of approximately 21 mm in the first direction and a dimension of approximately 2.7 mm in the second direction. That is, the length of the circuit board 100 may be approximately 21 mm, the width may be approximately 2.7 mm, and the aspect ratio may be approximately 7.8:1.

[0097] In some possible implementations, the circuit board assembly 40 also includes an antenna structure 300 and electronic components 400, with the antenna structure 300 provided on one of the first side 110 and the second side 120, and the electronic components 400 provided on the other of the first side 110 and the second side 120.

[0098] After the circuit board 100 is pre-fixed to the middle frame 10 by the pre-fixing piece 200, the electronic device has fewer restrictions on the selection of the circuit board 100. A thicker circuit board 100 can be selected to meet the clearance requirements of the antenna structure 300, so that the antenna structure 300 and electronic components 400 can be arranged on the first side 110 and the second side 120 respectively. This results in a higher density of components in the electronic device and a higher space utilization rate in the electronic device.

[0099] In some examples, the fixed connection segment 210 and the first side 110 can be fixed by welding.

[0100] This facilitates the fixed connection of the circuit board 100 and the pre-fixed piece 200 when their dimensions are small, for example, when their dimensions in the second direction are small. This makes it easier to arrange the circuit board 100 in a more compact space and improve the space utilization of the electronic device.

[0101] For example, when the width of the circuit board 100 is small and insufficient to open mating holes for connection on the circuit board 100, the fixed connection section 210 can be fixedly connected to the circuit board 100 by welding.

[0102] Figure 3 This is a schematic diagram of a circuit board assembly provided in an embodiment of this application.

[0103] like Figure 3 As shown, in some examples where the circuit board 100 and the pre-fixed piece 200 are larger, the fixing connection section 210 has a connection hole H2 (as shown). Figure 11 As shown in the figure, the first side 110 has a mating hole opposite to the connecting hole H2. A first fastener 500 is inserted into the connecting hole H2 and the mating hole. The first fastener 500 is used to fasten the fixed connecting section 210 to the circuit board 100.

[0104] For example, the first fastener 500 can be a threaded fastener, such as a screw.

[0105] For example, the fixed connection segment 210 and the circuit board 100 can be fixedly connected by welding and the first fastener 500, so that the connection between the fixed connection segment 210 and the circuit board 100 is relatively stable.

[0106] Figure 4 This is a schematic diagram of yet another circuit board assembly provided in an embodiment of this application. Figure 5 This is a cross-sectional schematic diagram of another electronic device provided in an embodiment of this application.

[0107] like Figure 4 , Figure 5 As shown, the fixing frame 11 includes a first frame 11a and a second frame 11b located on both sides of the circuit board 100 in a first direction. There is a mounting cavity S between the first frame 11a, the second frame 11b and the middle plate 12. The retaining wall 13 includes a first stop 13a and a second stop 13b. The first stop 13a is fixedly connected to the inner wall of the first frame 11a, and the second stop 13b is fixedly connected to the inner wall of the second frame 11b. The circuit board 100 is disposed between the first stop 13a and the second stop 13b.

[0108] In some examples, pre-fixed pieces 200 are fixedly connected to both ends of the circuit board 100 in the first direction. The abutting sections 230 of the pre-fixed pieces 200 fixedly connected to both ends of the circuit board 100 in the first direction are respectively disposed between the first stop 13a and the middle plate 12, and between the second stop 13b and the middle plate 12. The abutting sections 230 of the pre-fixed pieces 200 fixedly connected to both ends of the circuit board 100 in the first direction are respectively used to abut against the first stop 13a and the second stop 13b.

[0109] Figure 6 This is a schematic diagram of yet another circuit board assembly provided in an embodiment of this application. Figure 7 This is a cross-sectional schematic diagram of another electronic device provided in an embodiment of this application.

[0110] like Figure 6 , Figure 7 As shown, in some other examples, a pre-fixing piece 200 is fixedly connected to one end of the circuit board 100 near the first frame 11a, and a rigid pre-fixing member 600 is fixedly connected to one end of the circuit board 100 near the second frame 11b. The rigid pre-fixing member 600 extends out of the circuit board 100 in a direction away from the pre-fixing piece 200. The abutting section 230 of the pre-fixing piece 200 passes between the first stop 13a and the middle plate 12 and is used to abut against the first stop 13a. The part of the rigid pre-fixing member 600 extending out of the circuit board 100 passes between the second stop 13b and the middle plate 12 and is used to abut against the second stop 13b.

[0111] Figure 8 This is a schematic diagram of a pre-fixed sheet provided in an embodiment of this application.

[0112] like Figure 8 As shown, in some possible embodiments, the pre-fixing piece 200 has a hole structure H1 that extends through both sides of the pre-fixing piece 200 in the thickness direction, and at least a portion of the hole structure H1 is located in the bending section 220.

[0113] In this way, the rigidity of the bending section 220 can be reduced through the hole structure H1, making the bending section 220 easier to undergo elastic deformation, making it easier for the abutting section 230 to pass through between the retaining wall 13 and the middle plate 12, which facilitates the pre-fixing and disassembly of the circuit board 100 and the middle frame 10.

[0114] In some possible implementations, the hole structure H1 passes through one end of the bent section 220 connecting to the fixed connection section 210, and the bent section 220 connects to one end of the abutment section 230.

[0115] In this way, the hole structure H1 has a good effect on reducing the stiffness of the bending section 220, and the bending section 220 is more likely to undergo elastic deformation.

[0116] For example, part of the hole structure H1 is located in the fixed connection section 210, part is located in the abutment section 230, and part is located in the bending section 220.

[0117] In some possible implementations, the periphery of the hole structure H1 is a closed structure, that is, the solid structure of the pre-fixed piece 200 surrounds the hole structure H1.

[0118] In this way, the overall structure of the pre-fixed piece 200 is stable and has good reliability.

[0119] For example, the hole structure H1 can be a strip hole extending along the length direction of the pre-fixed piece 200.

[0120] Figure 9 for Figure 8 A schematic diagram of another perspective of the pre-fixed plate provided in the diagram.

[0121] like Figure 9 As shown, in some possible embodiments, the thickness of the pre-fixing piece 200 is L2, which is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

[0122] In this way, the pre-fixing piece 200 is easier to manufacture, and the pre-fixing piece 200 is thinner, making it easier for the bending section 220 to undergo elastic deformation, and making it easier for the abutting section 230 to pass through the retaining wall 13 and the middle plate 12.

[0123] For example, L2 can be approximately 0.15 mm.

[0124] In some possible implementations, the dimension of the bent segment 220 in the thickness direction of the circuit board 100 is L3, which is greater than or equal to 0.6 mm and less than or equal to 1.2 mm.

[0125] In this way, while the space occupied by the bending segment 220 in the thickness direction of the circuit board 100 is relatively small, it is easier for the bending segment 220 to undergo elastic deformation.

[0126] For example, L3 can be approximately 0.8 mm.

[0127] In some possible implementations, the abutment segment 230 has a dimension of L4 in the first direction, where L4 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

[0128] In this way, while the contact section 230 and the retaining wall 13 are in a relatively stable contact, the space occupied by the contact section 230 in the first direction is relatively small, which is conducive to arranging the contact section 230 in a relatively compact space, and can make the space utilization rate of electronic equipment higher.

[0129] For example, L4 can be approximately 1 mm.

[0130] In some possible implementations, the fixed connection segment 210 has a dimension of L5 in the first direction, where L5 is greater than or equal to 2 mm.

[0131] This allows the fixed connecting section 210 and the first side 110 to have a larger mating surface, which is conducive to the stable fixing of the fixed connecting section 210 and the first side 110, and facilitates the fixing of the fixed connecting section 210 and the smaller circuit board 100 in the second direction.

[0132] In some possible implementations, the dimension of the first sub-segment 221 connecting one end of the fixed connecting segment 210 and the second sub-segment 222 connecting one end of the abutting segment 230 in the first direction is L6, where L6 is greater than or equal to 0.6 mm and less than or equal to 1.6 mm.

[0133] This makes it easier to form the bent section 220 by stamping, while also making the size of the bent section 220 smaller in the first direction. This allows the pre-fixed piece 200 to be arranged in a more compact space, resulting in higher space utilization of the electronic device.

[0134] For example, L6 can be approximately 0.8 mm.

[0135] Figure 10 for Figure 8 This is another schematic diagram of the pre-fixed plate provided in the diagram.

[0136] like Figure 10 As shown, in some possible embodiments, the pre-fixing piece 200 has a dimension of L7 in the second direction, where L7 is greater than or equal to 1.5 mm and less than or equal to 3 mm.

[0137] In this way, while the width of the pre-fixing piece 200 is small and easy to arrange in a relatively compact space, the fixed connecting section 210 and the first side 110 have a large mating surface, which is conducive to the stable fixing of the fixed connecting section 210 and the first side 110. The abutting section 230 and the retaining wall 13 have a large abutting surface, which is conducive to the stable abutting of the abutting section 230 and the retaining wall 13. Thus, the circuit board 100 can be relatively stably pre-fixed to the middle frame 10 by the pre-fixing piece 200.

[0138] For example, the fixed connecting segment 210, the abutting segment 230 and the bending segment 220 have the same dimensions in the second direction, and the dimensions of the fixed connecting segment 210, the abutting segment 230 and the bending segment 220 in the second direction are all L7.

[0139] For example, L7 can be approximately 2.5mm.

[0140] In some possible implementations, the hole structure H1 has a dimension of L8 in the second direction, where L8 is less than L7 and L8 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0141] Thus, the hole structure H1 effectively reduces the stiffness of the bent section 220.

[0142] For example, L8 can be approximately 1.1 mm.

[0143] Figure 11 This is a schematic diagram of another pre-fixing sheet provided in an embodiment of this application.

[0144] In some examples where the fixed connection section 210 has a connection hole H2, the connection hole H2 partially overlaps with the hole structure H1, which makes the space utilization of the connection hole H2 and the hole structure H1 higher. This allows the size of the pre-fixed piece 200 to be smaller, which is beneficial for arranging the pre-fixed piece 200 in a more compact space, thus making the space utilization of the electronic device higher.

[0145] In some examples, the circuit board assembly 40 also includes a connecting piece, one end of which is fixedly connected to the first side 110, and the other end of which overlaps the side of the retaining wall 13 away from the middle plate 12 and is fixedly connected to the retaining wall 13 by a second fastener, so as to achieve the final fixation of the circuit board 100 and the middle frame 10.

[0146] For example, the connecting piece can be welded to the first side 110.

[0147] For example, the second fastener can be a threaded fastener, such as a screw. The connecting piece can be detachably connected to the retaining wall 13 via the threaded fastener.

[0148] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0149] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0150] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0151] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0152] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A circuit board assembly (40), characterized in that, Includes a circuit board (100) and a pre-fixed piece (200); The circuit board (100) includes a first side (110) and a second side (120), the first side (110) and the second side (120) being located on opposite sides of the thickness direction of the circuit board (100); The pre-fixed piece (200) includes a fixed connecting section (210), an abutting section (230), and an elastic bending section (220). The bending section (220) is located between the fixed connecting section (210) and the abutting section (230). The two ends of the bending section (220) are respectively connected to the fixed connecting section (210) and the abutting section (230). The fixed connecting section (210), the bending section (220), and the abutting section (230) are arranged along a first direction, which is perpendicular to the thickness direction of the circuit board (100). The fixed connection segment (210) is fixedly connected to the first side (110), and at least a portion of the bent segment (220) and the abutting segment (230) extend out of the circuit board (100) along the first direction.

2. The circuit board assembly (40) according to claim 1, characterized in that, The bent section (220) bends away from the second side (120) relative to the fixed connecting section (210) and the abutting section (230).

3. The circuit board assembly (40) according to claim 1, characterized in that, The bent segment (220) includes a first sub-segment (221) and a second sub-segment (222); One end of the first sub-segment (221) is connected to one end of the second sub-segment (222), and the first sub-segment (221) and the second sub-segment (222) form an angle structure; The other end of the first sub-segment (221) is connected to one end of the fixed connecting segment (210), and the first sub-segment (221) and the fixed connecting segment (210) form an obtuse angle structure; The other end of the second sub-segment (222) is connected to one end of the abutting segment (230), and the second sub-segment (222) and the abutting segment (230) form an obtuse angle structure.

4. The circuit board assembly (40) according to claim 3, characterized in that, The first sub-segment (221) and the second sub-segment (222) form an acute angle structure.

5. The circuit board assembly (40) according to claim 3, characterized in that, At least a portion of the first segment (221) and the second segment (222) extend out of the circuit board (100) along the first direction.

6. The circuit board assembly (40) according to claim 1, characterized in that, The fixed connecting section (210), the bending section (220), and the abutting section (230) are an integral structure.

7. The circuit board assembly (40) according to claim 1, characterized in that, The pre-fixing piece (200) has a hole structure (H1) that extends through both sides of the pre-fixing piece (200) in the thickness direction; At least a portion of the hole structure (H1) is located in the bent section (220).

8. The circuit board assembly (40) according to claim 7, characterized in that, The hole structure (H1) passes through one end of the bent section (220) connecting to the fixed connection section (210) and the other end of the bent section (220) connecting to the abutment section (230).

9. The circuit board assembly (40) according to claim 7, characterized in that, The periphery of the hole structure (H1) is a closed structure.

10. The circuit board assembly (40) according to any one of claims 1-9, characterized in that, The thickness of the circuit board (100) is greater than or equal to 0.7 mm.

11. The circuit board assembly (40) according to any one of claims 1-9, characterized in that, It also includes antenna structure (300) and electronic components (400). The antenna structure (300) is provided on one of the first side (110) and the second side (120), and the electronic component (400) is provided on the other of the first side (110) and the second side (120).

12. The circuit board assembly (40) according to any one of claims 1-9, characterized in that, The thickness of the pre-fixed piece (200) is greater than or equal to 0.1 mm and less than or equal to 0.2 mm.

13. The circuit board assembly (40) according to any one of claims 1-9, characterized in that, The bending segment (220) has a dimension in the thickness direction of the circuit board (100) that is greater than or equal to 0.6 mm and less than or equal to 1.2 mm.

14. The circuit board assembly (40) according to any one of claims 1-9, characterized in that, The dimension of the abutting section (230) in the first direction is greater than or equal to 0.5 mm and less than or equal to 1.5 mm.

15. An electronic device, characterized in that, Includes a mid-frame (10) and a circuit board assembly (40) as described in any one of claims 1-14; The middle frame (10) includes a fixed frame (11), a middle plate (12), and a retaining wall (13); The fixed frame (11) is fixedly connected to the middle plate (12), and there is an installation cavity (S) between the fixed frame (11) and the middle plate (12). The retaining wall (13) is fixedly connected to the fixed frame (11), and the retaining wall (13) protrudes from the inner wall of the fixed frame (11). The circuit board assembly (40) is disposed in the mounting cavity (S), and the retaining wall (13) is located on the side of the abutting section (230) of the circuit board assembly (40) away from the middle plate (12), and the abutting section (230) is used to abut against the retaining wall (13).

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