Terminal device

Abstract

The utility model provides terminal equipment which comprises a shell and a circuit board assembly, the circuit board assembly comprises a PCB and a circuit board support, and a plurality of fastening structures are arranged between the circuit board support and the shell so that the PCB can be fixedly installed on the shell through the circuit board support. The plurality of fastening structures comprise a first fastening structure, the area, corresponding to the first fastening structure, of the PCB is arranged to be an avoiding space used for avoiding the first fastening structure, and a first fastening piece of the first fastening structure penetrates through a first connecting hole of the circuit board support and is fixed in a second connecting hole of the shell; the circuit board support is fixedly connected to the shell through the first fastening structure, and the circuit board support presses the PCB to the shell in the thickness direction of the PCB. The PCB can be stably and reliably installed and fixed under the condition that the internal installation space is limited, and the structural stability and layout rationality of the whole machine can be improved.

Description

Technical Field

[0001] This application relates to the field of terminal equipment, and in particular to a terminal device. Background Technology

[0002] As terminal devices continue to evolve towards miniaturization and high performance, the number and complexity of internal functional components have increased significantly, leading to increasingly compact internal spaces. Among these, the PCB (printed circuit board), as a core component of the terminal device, integrates most of the functional components and undertakes critical tasks such as signal transmission, electromagnetic compatibility, and heat dissipation management.

[0003] However, the installation and layout of PCBs within terminal devices face severe space constraints. On the one hand, the trend towards miniaturization and high performance in terminal devices poses greater challenges to PCB area utilization, while also increasing design and manufacturing complexity. On the other hand, the installation and fixation of PCBs within terminal devices also present numerous challenges. Traditional PCB mounting methods primarily rely on threaded fastening, where mounting holes are drilled in the PCB, and the PCB support is secured to the terminal device's housing using fasteners (e.g., screws) passing through these holes. However, traditional mounting methods are limited when dealing with complex layouts; for example, space constraints on the PCB cannot guarantee the reliability of the mounting.

[0004] Therefore, in the existing technology, the installation space of PCB boards inside terminal equipment is limited, making it difficult to ensure installation reliability. Utility Model Content

[0005] The terminal device provided in this application embodiment solves the problem in the prior art where the installation space of the PCB board inside the terminal device is limited, making it difficult to ensure installation reliability.

[0006] A first aspect of this application provides a terminal device, including a housing and a circuit board assembly. The circuit board assembly includes a PCB board and a circuit board support. The circuit board support is disposed on one side of the PCB board along its thickness direction. Multiple fastening structures are provided between the circuit board support and the housing to fix the PCB board to the housing. The multiple fastening structures are spaced apart on a plane perpendicular to the thickness direction of the PCB board. Each fastening structure includes a first fastening structure. The area of ​​the PCB board corresponding to the first fastening structure is configured to provide clearance space for the first fastening structure, and the first fastening structure is located outside the outer edge of the PCB board.

[0007] The first fastening structure includes a first fastener, a first connecting hole, and a second connecting hole. The first connecting hole is disposed on the circuit board bracket, and the second connecting hole is disposed on the housing. The first fastener passes through the first connecting hole and is fixed in the second connecting hole, so that the circuit board bracket is fixedly connected to the housing through the first fastening structure, and the circuit board bracket presses the PCB board against the housing along the thickness direction of the PCB board.

[0008] The terminal device provided in this application embodiment includes a circuit board assembly comprising a PCB board and a circuit board bracket. The circuit board bracket can fix the PCB board to the housing of the terminal device through multiple spaced fastening structures. In other words, multiple fastening structures are provided between the circuit board bracket and the housing. Under the combined action of these multiple fastening structures, the circuit board bracket can press the PCB board tightly against the housing, thereby fixing the PCB board inside the terminal device, ensuring the stable operation of the PCB board and the functional devices mounted on it, and ensuring the reliability of the terminal device.

[0009] The system includes multiple fastening structures, including a first fastening structure. A region on the PCB board corresponding to the first fastening structure is configured to provide clearance for the first fastening structure; this can be understood as an area without a PCB board, and the first fastening structure is located outside the outer edge of the PCB board. Specifically, the first fastening structure includes a first fastener, a first connecting hole in the circuit board bracket, and a second connecting hole in the housing. The first fastener passes through the first connecting hole and is fixed within the second connecting hole, thus achieving a fixed connection between the circuit board bracket and the housing. Furthermore, the circuit board bracket can press the PCB board firmly onto the housing. In other words, the first fastening structure does not require mounting holes on the PCB board. By tightening the circuit board bracket at this location using the first fastener (e.g., a screw), axial pressure (which can be understood as pressure along the length of the first fastener) is generated, thus fixing the circuit board bracket to the housing. The circuit board bracket also firmly presses the PCB board onto the housing, thereby achieving reliable fixation of the PCB board within the terminal device and ensuring installation reliability.

[0010] Furthermore, to address the increasingly compact internal space of terminal devices—for example, the growing size of batteries occupying more internal space—the layout space of circuit board assemblies will inevitably be compressed. Considering that the PCB board in the circuit board assembly needs to accommodate various functional components and has complex wiring design, it is difficult to reserve sufficient installation space for the fastening structure (i.e., fastening structures are set by opening mounting holes on the PCB board, and the mounting holes need to be a certain distance from the edge of the PCB board to ensure the reliability of the fastening structure and the PCB board structure). Therefore, a first fastening structure can be adopted, which achieves stable fixation of the PCB board without occupying space on the PCB board. This allows the circuit board assembly to no longer be limited by the insufficient internal space of the terminal device, and enables more flexible design of the PCB board layout and the installation layout of functional components.

[0011] Furthermore, the design of the first fastening structure eliminates the need for mounting holes on the PCB board, thus saving structural space on the PCB board and reducing costs in PCB board production and processing.

[0012] In summary, the terminal device provided in this application embodiment can achieve stable and reliable installation and fixation of the PCB board under the condition of limited internal installation space, which can improve the structural stability and layout rationality of the whole machine.

[0013] In one possible implementation, the circuit board assembly further includes a first reinforcing piece corresponding to the first fastening structure. The first reinforcing piece includes a first reinforcing portion and a second reinforcing portion that are connected and relatively fixed. The first reinforcing portion is mounted on a first surface of the PCB board and is stacked between the PCB board and the circuit board support in the thickness direction of the PCB board. The first surface is a surface of the PCB board facing the circuit board support along its thickness direction. The second reinforcing portion is located outside the outer edge of the PCB board and is stacked between the housing and the circuit board support in the thickness direction of the PCB board.

[0014] The first fastening structure further includes a third connecting hole, which is located in the second reinforcing part. The first fastener passes through the first connecting hole and the third connecting hole in sequence and is fixed in the second connecting hole, so that the circuit board bracket and the second reinforcing part are fixedly connected to the housing through the first fastening structure, and the circuit board bracket presses the first reinforcing piece and the PCB board against the housing along the thickness direction of the PCB board.

[0015] By adopting the above solution, the first reinforcing piece can improve the mechanical strength of the PCB board in a specific area, preventing functional components from falling off or circuits from breaking. It can also participate in heat dissipation, improving the stability and reliability of the circuit board assembly. Furthermore, a third connecting hole is provided in the second reinforcing portion of the first reinforcing piece, through which the first fastener can pass. This allows the circuit board bracket and the second reinforcing portion to be fixedly connected to the housing. Tightening the circuit board bracket and the second reinforcing portion with the first fastener (e.g., a screw) causes the second and first reinforcing portions to jointly generate a downward force, firmly pressing the PCB board together, thereby completing the PCB board fixation and ensuring installation reliability.

[0016] The second reinforcing part of the first reinforcing piece is located on the outer side of the outer edge of the PCB board. The first fastener used for installation and fixation does not occupy space resources on the PCB board. While enhancing the structure of the circuit board assembly, it can also better overlap between the circuit board bracket and the housing. It can be used in combination with different structures to make full use of the stacking space inside the terminal equipment, ensuring the installation reliability of the circuit board assembly and improving the layout flexibility.

[0017] In one possible implementation, the second reinforcing portion is provided with a first contact portion that contacts the housing so that the first reinforcing piece is electrically connected to the housing.

[0018] Using the above scheme, the conductive part of the housing can serve as the reference ground of the terminal device. The first contact part of the second reinforcement part contacts and is electrically connected to the housing, which enables the PCB board to be electrically connected to the conductive part of the housing in sequence through the first reinforcement part, the second reinforcement part, and the first contact part of the first reinforcement piece, thereby grounding the PCB board. At the same time, it also enables the circuit board bracket to be electrically connected to the conductive part of the housing in sequence through the second reinforcement part and the first contact part, thereby grounding the circuit board bracket.

[0019] Furthermore, the second reinforcing part is equipped with a first contact portion. On the one hand, this allows for a more stable electrical connection with the housing, improving the reliability of the circuit board assembly. On the other hand, grounding using the first reinforcing piece eliminates the need for additional structures (such as conductive pads) to achieve the grounding function. This not only reduces the space occupied inside the terminal equipment but also simplifies the installation process. It effectively reduces or avoids grounding problems caused by loosening or poor contact due to other structures, ensuring the reliability and safety of the terminal equipment.

[0020] In one possible implementation, the first contact portion is configured as a protrusion that protrudes from the surface of the second reinforcing portion away from the circuit board support, and the protrusion and the second reinforcing portion are configured as an integral structure; or, the first contact portion is configured as a conductive layer covering the surface of the second reinforcing portion.

[0021] By adopting the above solution, the first contact portion is set as a protrusion, and the protrusion and the second reinforcing portion are set as an integral structure, which can make the electrical connection between the first reinforcing piece and the housing more stable and further improve the reliability of the circuit board assembly.

[0022] In one possible implementation, there are multiple first contact portions, which are disposed on the portion of the second reinforcing portion located around the third connecting hole and are spaced apart circumferentially along the third connecting hole.

[0023] By adopting the above scheme, the first reinforcing piece is electrically connected to the conductive part of the housing through multiple spaced first contact portions, which can more reliably realize the grounding function of the PCB board and the circuit board bracket, and realize the signal grounding integrity in the terminal equipment.

[0024] In one possible implementation, the first reinforcing sheet is configured as a one-piece sheet structure.

[0025] Using the above solution, the sheet-like structure can adapt to the compact stacking space inside the terminal device, which is beneficial for the thinner and lighter design of the terminal device. The integrated first reinforcing sheet is easy to install and can easily reinforce local structures on the PCB board, facilitating positioning and manufacturing.

[0026] In one possible implementation, the first reinforcing sheet is made of metal.

[0027] Using the above solution, the first reinforcing sheet made of metal has a stable structure, high reliability, and helps heat dissipation of the circuit board assembly. It can also play a role in electromagnetic shielding and participate in signal transmission (such as grounding signals), thus realizing the multifunctionality of a single structure.

[0028] In one possible implementation, the circuit board bracket includes a bracket body and a first bracket mounting platform connected to the bracket body.

[0029] The housing includes a support platform and a fixing platform corresponding to the circuit board assembly. The support platform has a support surface for supporting the PCB board, and the fixing platform protrudes from the support surface of the support platform in the thickness direction of the PCB board. A first connecting hole is provided on the first bracket mounting platform, and a second connecting hole is provided on the fixing platform. The first bracket mounting platform is pressed against the fixing platform by a first fastening structure, so that the circuit board bracket presses the PCB board against the support platform.

[0030] When the circuit board assembly includes the first reinforcing piece, the first bracket mounting platform presses the second reinforcing portion of the first reinforcing piece against the fixing platform through the first fastening structure, so that the circuit board bracket presses the first reinforcing portion of the first reinforcing piece and the PCB board against the support platform.

[0031] With the above solution, a support platform and a fixing platform are provided on the housing for the fixed position of the circuit board assembly (i.e., the position where the first fastening structure is located). The first bracket mounting platform of the circuit board bracket is provided with a first connecting hole, which can more accurately and reliably press the PCB board into the housing and limit the possible displacement and loosening of the PCB board in the terminal device, thereby improving the reliability of the circuit board assembly.

[0032] In one possible implementation, the housing includes a top region, a battery compartment region, and a bottom region sequentially arranged along the length of the terminal device. The terminal device also includes a first circuit board assembly, a second circuit board assembly, and a battery. The first circuit board assembly is fixed to the top region, the battery is fixed to the battery compartment region, and the second circuit board assembly is fixed to the bottom region. The first circuit board assembly and / or the second circuit board assembly are configured as circuit board assemblies with a first fastening structure.

[0033] By adopting the above solution, a first fastening structure can be provided in the first current board assembly and / or the second circuit board assembly, which can reduce the space occupied by the PCB board and improve the utilization rate of the internal space of the terminal equipment while ensuring the reliability of PCB fixing.

[0034] In one possible implementation, at least one first fastening structure in the first circuit board assembly is located at a first corner of the top region, the first corner being a corner of the top region that connects to the battery compartment region.

[0035] In one possible implementation, at least one first fastening structure in the second circuit board assembly is located at a first corner of the bottom region, the first corner of the bottom region being a corner of the bottom region that connects to the battery compartment region.

[0036] In one possible implementation, the terminal device also includes a vibration motor mounted in the bottom region, with a first corner of the bottom region located between the vibration motor and the battery compartment region.

[0037] In one possible implementation, the housing includes a middle frame, which includes a middle plate and a frame connected to the outer periphery of the middle plate, and a PCB board is fixedly mounted on the middle plate of the middle frame. Attached Figure Description

[0038] Figure 1a This is a three-dimensional structural diagram of the terminal device according to an embodiment of this application;

[0039] Figure 1b This is an exploded view of the terminal device according to an embodiment of this application;

[0040] Figure 1c This is a schematic diagram of the rear structure of the terminal device according to an embodiment of this application (the back cover has been removed from the figure);

[0041] Figure 2a This is a cross-sectional schematic diagram of the terminal device according to an embodiment of this application;

[0042] Figure 2b This is a second cross-sectional schematic diagram of the terminal device according to an embodiment of this application;

[0043] Figure 3a This is a three-dimensional structural diagram of the first corner of the terminal device according to an embodiment of this application;

[0044] Figure 3b This is an exploded structural diagram of the first corner of the terminal device according to an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of a fastening structure in a reference design;

[0046] Figure 5 This is a top view of the first fastening structure in the terminal device according to an embodiment of this application;

[0047] Figure 6a for Figure 5 Schematic diagram of the cross-sectional structure along the AA direction;

[0048] Figure 6b for Figure 5 Schematic diagram of the cross-sectional structure along the BB direction;

[0049] Figure 7a This is a three-dimensional structural diagram of the circuit board assembly in the terminal device according to an embodiment of this application;

[0050] Figure 7b This is a second three-dimensional structural diagram of the circuit board assembly in the terminal device according to an embodiment of this application (the circuit board bracket has been removed from the diagram);

[0051] Figure 8a This is a schematic diagram of the structure of the first reinforcing sheet in the terminal device according to an embodiment of this application;

[0052] Figure 8b for Figure 8a A cross-sectional view along the CC direction;

[0053] Figure 9 This is a schematic diagram of the circuit board bracket in the terminal device according to an embodiment of this application;

[0054] Figure 10 This is a schematic diagram of the structure of a portion of the housing in the terminal device according to an embodiment of this application;

[0055] Figure 11a This is a schematic diagram of the area where the first fastening structure of the terminal device is located, according to an embodiment of this application.

[0056] Figure 11b This is a schematic diagram of the area where the first fastening structure of the terminal device is located, according to an embodiment of this application.

[0057] Figure 11c This is a schematic diagram (3) showing the area where the first fastening structure of the terminal device is located, according to an embodiment of this application.

[0058] Figure 12a This is a top view of the second fastening structure in the terminal device according to an embodiment of this application;

[0059] Figure 12b for Figure 12a A cross-sectional view along the DD direction.

[0060] Explanation of reference numerals in the attached figures:

[0061] Reference Design:

[0062] 100', Terminal equipment;

[0063] 1', Housing; 11', Second connecting hole;

[0064] 22', Battery; 23', Vibration motor;

[0065] 3', Circuit board assembly; 31', PCB board; 311', Mounting hole; 32', Circuit board bracket; 321', First connection hole;

[0066] 33', Reinforcing plate; 331', Third connecting hole;

[0067] 35', Conductive pad;

[0068] 41' Fasteners.

[0069] This application:

[0070] 100. Terminal equipment;

[0071] 1. Housing; 101. Top area; 1011. First corner; 102. Battery compartment area; 103. Bottom area; 1031. First corner;

[0072] 11. Mid-frame; 111. Frame; 112. Mid-plate; 12. Back cover; 13. Second connecting hole;

[0073] 141. Support platform; 1411. Support surface; 142. Fixing platform; 143. Positioned part; 15. Fifth connecting hole;

[0074] 21. Display screen; 22. Battery;

[0075] 23. Vibration motor; 24. Speaker;

[0076] 3. Circuit board assembly;

[0077] 31. PCB board; 311. Clearance space; 312. Outer edge; 313. First surface; 314. Positioning part; 315. Mounting hole;

[0078] 32. Circuit board bracket; 321. First connecting hole; 322. Bracket body; 3231. First bracket mounting platform; 3232. Second bracket mounting platform;

[0079] 324. Second contact portion; 325. Fourth connecting hole;

[0080] 33. First reinforcing piece; 331. First reinforcing portion; 332. Second reinforcing portion; 3321. Third connecting hole; 3322. First contact portion;

[0081] 34. Second reinforcing plate; 341. Sixth connecting hole;

[0082] 35. Conductive pads;

[0083] 4. Fastening structure; 41. First fastening structure; 411. First fastener;

[0084] 42. Second fastening structure; 421. Second fastener;

[0085] 51. First circuit board assembly; 511. First PCB board; 52. Second circuit board assembly; 521. Second PCB board;

[0086] X represents the length of the terminal device; Y represents the width of the terminal device; Z1 represents the thickness of the terminal device.

[0087] Z2, the thickness direction of the PCB board. Detailed Implementation

[0088] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application will be presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0089] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0090] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0091] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0092] In the description of the embodiments of this application, it should be understood that "electrical connection" in the embodiments of this application can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Communication connection" can refer to electrical signal transmission, including wireless communication connection and wired communication connection. Wireless communication connection does not require a physical medium and is not a connection relationship that limits the product structure.

[0093] In the description of the embodiments of this application, it should be noted that the mutual perpendicularity in the embodiments of this application is not absolute perpendicularity. Approximate perpendicularity due to processing errors and assembly errors (e.g., the included angle between two structural features is 89°) is also within the range of mutual perpendicularity in the embodiments of this application. Similarly, the mutual parallelism in the embodiments of this application is not absolute parallelism. Approximate parallelism due to processing errors and assembly errors (e.g., the included angle between two structural features is 1°) is also within the range of mutual parallelism in the embodiments of this application. The axial symmetry in the embodiments of this application is not absolute axial symmetry. Approximate axial symmetry due to processing errors and assembly errors (e.g., a portion of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the range of axial symmetry in the embodiments of this application. The central symmetry in the embodiments of this application is not absolute central symmetry. Approximate central symmetry due to processing errors and assembly errors (e.g., a portion of the structure is offset by a certain distance or angle relative to the axis of symmetry) is also within the range of central symmetry in the embodiments of this application. The embodiments of this application do not impose specific limitations on this.

[0094] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0095] As terminal devices continue to evolve towards miniaturization, thinner designs, and higher performance, they integrate a large number of high-performance functional components. Consequently, batteries occupy more internal installation space, leading to a continuous compression of the internal stacking space. Circuit board assemblies, serving as crucial electrical carriers, integrate various electronic components and chips onto these limited PCBs. On one hand, the limited installation space within terminal devices results in a significant reduction in PCB area. On the other hand, the integration of numerous electronic components and complex wiring on the PCBs further complicates matters, making it impossible to reserve sufficient space for drilling and mounting fasteners. This ultimately affects the reliability of the circuit board assembly within the terminal device.

[0096] To address the aforementioned issues, this application proposes a terminal device that enables stable and reliable installation and fixation of the PCB board within limited internal installation space, thereby improving the overall structural stability and layout rationality of the device.

[0097] It should be noted that the specific type of terminal device is not limited; it can be a mobile phone, tablet computer, wearable smartwatch, etc. For ease of explanation and understanding, the following description uses a mobile phone as an example to illustrate the structure and functions of the terminal device.

[0098] The following section first provides an example illustrating the basic structure of the terminal device.

[0099] Please see Figures 1a-2b , Figure 1a This is a three-dimensional structural diagram of the terminal device according to an embodiment of this application. Figure 1b This is an exploded view of the terminal device according to an embodiment of this application. Figure 1c This is a schematic diagram of the rear structure of the terminal device according to an embodiment of this application (the back cover has been removed from the figure). Figure 2a This is a cross-sectional schematic diagram of the terminal device according to an embodiment of this application. Figure 2b This is a second cross-sectional schematic diagram of the terminal device according to an embodiment of this application. It should be noted that the accompanying drawings of this embodiment are for illustrative purposes only, and the size and positional relationship of the components in the drawings do not represent the size and positional relationship of the components in the actual product. The terminal device may also include more or fewer components than shown in the drawings, and this embodiment of the application does not impose any limitations on this.

[0100] like Figures 1a-1c As shown, the terminal device 100 includes a housing 1 and a display screen 21. The housing 1 serves to protect the terminal device 100 and support the entire device. It has an internal space for housing electronic components within the terminal device 100. The display screen 21 is disposed within the housing space and connected to the housing 1. The specific structure of the housing 1 will be described later in conjunction with the accompanying drawings.

[0101] Specifically, the display screen 21 is used to display images. The display screen 21 may be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, or a quantum dot light-emitting diode (QLED) display screen, etc. The embodiments of this application do not limit the type and specific structure of the display screen 21.

[0102] like Figure 1b As shown, the terminal device 100 also includes a battery 22 and a circuit board assembly 3 (e.g., a first circuit board assembly 51 and a second circuit board assembly 52) installed within the housing 1. The battery 22 is a functional device that supplies power to the various electronic components in the terminal device 100, and it is typically connected to the circuit board assembly 3. The battery 22 can be, for example, a lithium-ion battery, a nickel-cadmium battery, or a nickel-metal hydride battery; the specific type is not limited in this embodiment. The specific structure of the circuit board assembly 3 will be described in detail later.

[0103] It should be noted that the number of circuit board assemblies 3 within the terminal device 100 is unlimited. In one possible implementation, such as... Figure 1b and Figure 1c As shown, the terminal device 100 also includes a first circuit board assembly 51 and a second circuit board assembly 52. ​​The first circuit board assembly 51 includes a first PCB board 511, which is the motherboard and is mainly responsible for the calculation of most system functions. In one example, the first circuit board assembly 51 also includes a camera compact module (CCM), a system on chip (SOC), a wireless Fidelity (Wi-Fi) module, and a power management unit (PMU) disposed on the first PCB board 511. The second circuit board assembly 52 includes a second PCB board 521, which is a sub-board and is mainly responsible for auxiliary functions such as audio signal transmission and signal connection processing. In one example, the second PCB board 521 is provided with a signal receiving element (not shown in the figure), and the second PCB board 521 is electrically connected to the speaker 24.

[0104] In one possible implementation, such as Figure 1c As shown, the terminal device 100 may further include a vibration motor 23. The vibration motor 23 can generate vibrations to provide tactile feedback to the user, interacting with the user in a more intelligent and personalized way, thus enhancing the user experience. The vibration motor 23 is mounted on the housing 1. It should be noted that the positional relationship between the vibration motor 23 and the speaker 24 is not limited. In one possible implementation, the vibration motor 23 and the speaker 24 are spaced apart in the width direction Y of the terminal device.

[0105] It should be noted that the specific type of vibration motor 23 is not limited. In one example, vibration motor 23 is a linear vibration motor, such as an X-linear vibration motor.

[0106] In one possible implementation, such as Figure 1b and Figure 1c As shown, the housing 1 includes a top region 101, a battery compartment region 102, and a bottom region 103 arranged sequentially in the length direction X of the terminal device. The first circuit board assembly 51 is fixed to the top region 101, the battery 22 is fixed to the battery compartment region 102, and the second circuit board assembly 52 is fixed to the bottom region 103.

[0107] It should be noted that in other possible implementations, the first circuit board assembly 51 may be located in the bottom region 103 of the housing 1, and the second circuit board assembly 52 may be located in the top region 101 of the housing 1. This application embodiment does not limit this.

[0108] Furthermore, those skilled in the art will understand that the terminal device 100 may also include only the first circuit board assembly 51 or the second circuit board assembly 52, and the embodiments of this application do not limit this.

[0109] It should be noted that the specific mounting position of the vibration motor 23 within the housing 1 is not limited. One possible implementation is as follows: Figure 1c As shown, the vibration motor 23 is installed in the bottom region 103 of the housing 1, and the first corner 1031 of the bottom region 103 is located between the vibration motor 23 and the battery compartment region 102. The first corner 1031 of the bottom region 103 is the corner of the bottom region 103 that is connected to the battery compartment region 102.

[0110] The above mainly introduced the possible structures of the terminal device 100. The following text will elaborate on the specific structure of the housing 1.

[0111] It will be understood by those skilled in the art that the specific structure of the housing 1 is not limited. For example... Figure 2a and Figure 2b As shown, in one possible implementation, the housing 1 includes a middle frame 11, which includes a middle plate 112 and a frame 111 connected to the outer periphery of the middle plate 112. The middle plate 112 supports the display screen 21 and the internal components of the terminal device 100. The frame 111 is a frame structure surrounding the outer periphery of the terminal device 100, and may include four sides surrounding the display screen 21 to help fix the display screen 21. In other possible implementations, the frame 111 may also include only three sides, two sides, etc., and this embodiment does not limit this. The frame 111 may be formed of a conductive material such as metal or a non-conductive material such as plastic.

[0112] In one possible implementation, the frame 111, primarily composed of conductive material, can be referred to as the conductive frame or metal frame of the terminal device 100, suitable for industrial design (ID) with a metallic appearance. In one example, the outer surface of the frame 111 is primarily made of conductive material, such as metal, thus forming the appearance of a metallic frame. In another possible implementation, the outer surface of the frame 111 is primarily made of non-conductive material, such as plastic, forming the appearance of a non-metallic frame, suitable for non-metallic ID. In one example, the inner surface of the frame 111 may include conductive material, such as metal. It should be understood that both the conductive and non-conductive materials can be considered as part of the frame 111.

[0113] It should be noted that the middle plate 112 can be made of conductive material (e.g., metal); or it can be made of both conductive and non-conductive materials (e.g., plastic). Furthermore, the housing 1 may also include a back cover 12, also known as a battery cover, which is located on the back of the terminal device 100. The back cover 12, the middle frame 11, and the display screen 21 together form a closed enclosure to house the electronic components inside the terminal device 100, while also providing protection against dust, impacts, and hardware scratches.

[0114] It should be noted that the back cover 21 can be a back cover made of metal; it can also be a back cover made of non-conductive material, such as a glass back cover, a plastic back cover, or other non-metallic back covers; or it can be a back cover made of both conductive and non-conductive materials.

[0115] It is understood that the conductive parts in the middle frame 11 of the housing 1 and / or the back cover 12 can serve as the reference ground of the terminal device 100. The PCB board 31, circuit board bracket 32, etc. of the terminal device 100 mentioned below can be grounded through electrical connection with the middle frame 11.

[0116] It should be noted that the back of the terminal device 100 can be understood as the side facing away from the user when the user uses the terminal device 100, that is, the surface facing away from the display screen in the thickness direction Z1 of the terminal device. The top area 101 of the housing 1 is the area where the top of the housing 1 is located when the user uses the terminal device 100, the bottom area 103 of the housing 1 is the area where the bottom of the housing 1 is located when the user uses the terminal device 100, and the battery compartment area 102 of the housing 1 is the area where the battery 22 is installed in the housing 1. It should be understood that, in the embodiments of this application, when the user holds the terminal device 100 (for example, when the user holds the terminal device 100 and unlocks it, or for example, when the user holds the terminal device 100 vertically and faces the display screen 21), the terminal device 100 has a top, bottom, left side and right side.

[0117] In one possible implementation, such as Figure 2b As shown, the middle plate 112 of the middle frame 11 is reused as the back cover 12. Specifically, in the thickness direction Z1 of the terminal device, the display screen 21 is mounted on one side of the frame 111, and the middle plate 112 is connected to the other side of the frame 111 and serves as the back cover 12 of the terminal device 100. Alternatively, the entire middle frame 11 can be understood as having a "U-shaped structure" in cross-section. In this way, the middle plate 112 simultaneously performs the functions of both the middle plate 112 and the back cover 12, eliminating the need for an additional back cover 12, which helps save space and reduce the overall thickness and weight of the device.

[0118] It should be noted that the middle frame 11 can be a separate structure or a one-piece structure, and this application embodiment does not limit this. In one example, the middle frame 11 is a separate structure, that is, the middle plate 112 and the frame 111 are two different parts, which can be assembled together by snap-fit, fastening, or other means, and can be separated when disassembly is required. In another example, the middle frame 11 is a one-piece structure. Specifically, the middle plate 112 and the frame 111 of the middle frame 11 can be manufactured by one-piece molding or assembled by permanent connection methods such as welding, and this application embodiment does not limit this.

[0119] In other possible implementations, such as Figure 2a As shown, the middle plate 112 can also be spaced apart from the rear cover 12, i.e., the rear cover 12 is set separately. Specifically, in the thickness direction Z1 of the terminal device, the rear cover 12 is connected to one side of the frame 111, the middle plate 112 can be set in the middle of the frame 111, and the display screen 21 and the rear cover 12 are respectively mounted on both sides of the middle plate 112. In this way, both the middle plate 112 and the rear cover 12 can be used to install devices, providing more installation space for electronic components.

[0120] It should be noted that the connection method between the middle frame 11 and the back cover 12 is not limited in the embodiments of this application. In one example, the middle frame 11 and the back cover 12 are manufactured by integral molding or assembled by permanent connection methods such as welding.

[0121] In one possible implementation, the middle plate 112 has multiple regions (e.g., top region 101, battery compartment region 102, and bottom region 103). Different regions of the middle plate 112 are used to install different components. These different regions can be separated by structures such as stiffeners, which not only rationally divides the internal space of the terminal device 100 but also uses stiffeners and other structures to support and fix the components. It should be noted that the embodiments of this application do not limit the relative positions of the components within the terminal device 100.

[0122] It should be noted that, as Figure 2a As shown, the battery 22 can be disposed between the middle plate 112 of the middle frame 11 and the back cover 12, or, as... Figure 2b As shown, the battery 22 can be disposed between the middle plate 112 of the middle frame 11 and the display screen 21, but this embodiment does not limit this.

[0123] The above mainly provides an exemplary description of the structure of housing 1. The following section will provide a detailed description of the basic structure of circuit board assembly 3 in conjunction with the accompanying drawings.

[0124] Please see Figure 3a and Figure 3b , Figure 3aThis is a three-dimensional structural diagram of the first corner of the terminal device according to an embodiment of this application. Figure 3b This is an exploded structural diagram of the first corner of the terminal device according to an embodiment of this application. It should be noted that the first circuit board assembly 51 or the second circuit board assembly 52 mentioned above can adopt the structure of the circuit board assembly 3 described below, or both the first circuit board assembly 51 and the second circuit board assembly 52 can adopt the structure of the circuit board assembly 3 described below. This embodiment of the application does not limit this.

[0125] like Figure 1c , Figure 3a and Figure 3b As shown, the circuit board assembly 3 includes a PCB board 31 and a circuit board support 32. The circuit board support 32 is disposed on one side of the PCB board along its thickness direction Z2. A plurality of fastening structures 4 are provided between the circuit board support 32 and the housing 1 so that the circuit board support 32 fixes the PCB board 31 to the housing 1. The plurality of fastening structures 4 are spaced apart on a plane perpendicular to the thickness direction Z2 of the PCB board.

[0126] It should be noted that in one possible implementation, the thickness direction Z2 of the PCB board is parallel to the thickness direction Z1 of the terminal device 100.

[0127] The PCB board 31 serves as the carrier for mounting and connecting electronic components in the terminal device 100. For example, the PCB board 31 may have multiple functional modules to achieve corresponding functions, such as a charging management module, a power management module, a wireless communication module, an audio module, etc. This application embodiment does not impose any limitations on this. Furthermore, one or more electronic components may be mounted on the PCB board 31, or electrically connected to other electronic components within the housing 1 via additional wiring.

[0128] Furthermore, the specific type of dielectric board in PCB board 31 is not limited. For example, it can be a flame-retardant material (FR-4) dielectric board, a Rogers dielectric board, or a hybrid dielectric board of Rogers and FR-4, etc. Here, FR-4 is a code for a flame-retardant material grade, and Rogers dielectric board is a high-frequency board.

[0129] In one possible implementation, a metal layer can be disposed on the PCB board 31. This metal layer can be used to ground electronic components carried on the PCB board 31, or to ground other components. This metal layer can be referred to as a ground plane, grounding plane, or ground layer. In one example, this metal layer can be formed by etching metal onto the surface of any dielectric layer in the PCB board 31. In one example, the edge of the PCB board 31 can be considered as the edge of its ground layer. In one example, the middle frame 11 (made of metal) can also be used to ground the aforementioned components.

[0130] One possible implementation is, such as Figure 2a and Figure 3a As shown, the PCB board 31 is fixedly mounted on the middle plate 112 of the middle frame 11. In one example, the PCB board 31 is located between the middle plate 112 and the rear cover 12. In this case, the circuit board assembly 3 can be fixed on the housing 1, which provides reliable physical support and protection for the PCB board 31, provides a grounding path for the PCB board 31, and helps to conduct and dissipate heat on the PCB board 31, ensuring the safety and reliability of the circuit board assembly 3 within the terminal device 100. In other examples, the PCB board 31 may also be located between the middle plate 112 of the middle frame 11 and the display screen 21; this application does not impose any limitations on this.

[0131] Furthermore, such as Figure 3a and Figure 3b As shown, the circuit board support 32 is located on the side of the PCB board away from the housing 1 along its thickness direction Z2. It can fix and support the PCB board 31, preventing the PCB board 31 from shifting or being damaged due to external forces such as vibration and drops during use. It can also provide additional structural strength to the PCB board 31, ensuring that the PCB board 31 can remain stable when subjected to external forces. On the other hand, the circuit board support 32 is usually made of metal materials, such as aluminum alloy or stainless steel, which has good electromagnetic shielding performance. It can effectively shield electromagnetic interference between electronic components, improve the stability and reliability of signal transmission, and can also participate in heat dissipation design to improve the heat dissipation performance of the terminal device 100.

[0132] It should be noted that the specific structure and material of the circuit board support 32 are not limited, and those skilled in the art can reasonably set it according to the internal stacking space design. It is understood that the circuit board support 32 can be a circuit board support made of conductive materials (e.g., metal materials); or it can be a circuit board support made of both conductive and non-conductive materials (e.g., plastic).

[0133] It is understandable that when the circuit board support 32 is made of conductive material (e.g., metal) or includes conductive material, the circuit board support 32 usually has good hardness and ductility, which can reduce damage under stress concentration conditions, and therefore the circuit board support 32 is not easily damaged.

[0134] It is understandable that, such as Figure 3a and Figure 3b As shown, the circuit board assembly 3 and the middle plate 112 of the housing 1 are stacked sequentially in the thickness direction Z2 of the PCB board. Specifically, the circuit board support 32, the PCB board 31 and the middle plate 112 of the housing 1 are stacked sequentially in the thickness direction Z2 of the PCB board. In this way, the PCB board 31 can be fixed on the middle plate 112 of the housing 1 by the circuit board support 32.

[0135] The method of fixing the PCB board 31 is not limited. One possible implementation is as follows: Figure 1c , Figure 3a and Figure 3b As shown, the circuit board bracket 32 ​​can fix the PCB board 31 to the housing 1 of the terminal device 100 through multiple spaced fastening structures 4. That is, multiple fastening structures 4 (e.g., threaded fastening structures) are provided between the circuit board bracket 32 ​​and the housing 1. Under the combined action of the multiple fastening structures 4, the circuit board bracket 32 ​​can press the PCB board 31 tightly against the housing 1, thereby fixing the PCB board 31 inside the terminal device 100, ensuring the stable operation of the PCB board 31 and the functional devices mounted on the PCB board 31, and ensuring the reliability of the terminal device 100.

[0136] Furthermore, the specific structure of the circuit board assembly 3 is not limited. In one possible implementation, the circuit board assembly 3 may also include a reinforcing sheet (see...). Figure 3b The first reinforcing piece 33 significantly improves the mechanical strength of the PCB board 31 in a specific area, preventing components from falling off or circuits from breaking, ensuring the PCB board 31 is securely installed in the circuit board assembly 3, and also assisting in heat dissipation. The specific structure of the first reinforcing piece 33 will be described in detail later with reference to the accompanying drawings.

[0137] In other possible implementations, the reinforcing sheet may not be provided in the circuit board assembly 3, and this application embodiment does not limit this.

[0138] Understandably, reinforcing sheets are usually made of metal, which has good hardness and ductility, and can reduce damage under stress concentration. Therefore, the reinforcing sheets in circuit board assembly 3 are not easily damaged.

[0139] Understandably, grounding the PCB board 31 in circuit board assembly 3 is an essential part of the design. It ensures there is no potential difference between the various circuits, thereby guaranteeing the stable operation of the circuit system. It also suppresses electromagnetic interference within the terminal device 100, prevents static electricity accumulation, improves signal integrity and stability, and ensures the reliability and safety of the terminal device 100. The specific implementation of grounding the PCB board 31 in circuit board assembly 3 will be explained in detail later with reference to the accompanying drawings.

[0140] The following section first introduces the fastening structure in a reference design.

[0141] Please see Figure 4 , Figure 4 This is a schematic diagram of a fastening structure in a reference design.

[0142] like Figure 4As shown, the circuit board assembly 3' includes a circuit board support 32', a reinforcing plate 33', and a PCB board 31' stacked sequentially in the thickness direction of the PCB board 31'. The circuit board support 32' has a first connection hole 321', the housing 1' of the terminal device 100' has a second connection hole 11', the reinforcing plate 33' has a third connection hole 331', and the PCB board 31' has mounting holes 311' (i.e., holes drilled in the PCB board 31' to allow fasteners 41' to pass through). Fasteners 41' (e.g., screws) pass sequentially through the first connection hole 321', the third connection hole 331', the mounting hole 311', and the second connection hole 11', so that the circuit board support 32', through the force generated by the fasteners 41', presses the PCB board 31', thus fixing the circuit board assembly 3' to the housing 1'. It is understandable that the terminal device 100' may include multiple fasteners 41', which work together to press the PCB board 31' against the housing 1', achieving reliable fixation of the PCB board 31' and ensuring the reliability and safety of the terminal device 100'. Therefore, to prevent the PCB board 31' from cracking due to holes, affecting the reliability of the circuit board assembly 3', sufficient space needs to be reserved when drilling holes in the PCB board 31'. That is, the mounting holes 311' need to be a certain distance from the edge of the PCB board 31' (it should be noted that when the mounting holes 311' of the dielectric board in the PCB board 31' are too close to the edge of the PCB board 31', cracking is likely to occur at that location). This ensures sufficient structural strength when the fasteners 41' are installed and tightened. In this case, the mounting holes 311' occupy a large area on the PCB board 31', making it difficult to ensure the structural and installation reliability of the PCB board 31' under limited space conditions (e.g., when the distance D' between the vibration motor 23' and the battery 22' is small).

[0143] Furthermore, in order to ensure the stability of signal transmission and the safety of circuit in the circuit board assembly 3' in the terminal device 100', separate conductive pads 35' need to be installed between the circuit board bracket 32' and the reinforcing piece 33', and between the PCB board 31' and the housing 1' to ground the PCB board 31'. This will increase the installation difficulty of the circuit board assembly 3' and occupy more space in the terminal device 100', which is not conducive to the thin and light design of the terminal device 100'.

[0144] In response, this application provides a terminal device 100 in which the first fastening structure 41 of the circuit board assembly 3 inside the terminal device 100 does not require drilling holes in the PCB board 31 for fixation. This allows for stable and reliable installation and fixation of the PCB board 31 even under conditions of limited internal installation space, thereby improving the structural stability and layout rationality of the entire device.

[0145] Please see Figures 5-7b , Figure 5 This is a top view of the first fastening structure in the terminal device according to an embodiment of this application. Figure 6a for Figure 5 Schematic diagram of the cross-sectional structure along the AA direction. Figure 6b for Figure 5 Schematic diagram of the cross-sectional structure along the BB direction. Figure 7a This is a three-dimensional structural diagram of the circuit board assembly in the terminal device according to an embodiment of this application; Figure 7b This is a two-dimensional structural diagram of the circuit board assembly in the terminal device according to an embodiment of this application (the circuit board bracket has been removed from the diagram).

[0146] like Figure 6a , Figure 6b and Figure 7a As shown, and in combination Figure 1c It is understood that the multiple fastening structures 4 within the terminal device 100 include a first fastening structure 41. The area of ​​the PCB board 31 corresponding to the first fastening structure 41 is configured as a clearance space 311 for avoiding the first fastening structure 41. This can be understood as the area where the first fastening structure 41 is located not having a PCB board 31, and the first fastening structure 41 being located outside the outer edge 312 of the PCB board 31.

[0147] Specifically, such as Figure 6b As shown, the first fastening structure 41 includes a first fastener 411, a first connecting hole 321 located on the circuit board bracket 32, and a second connecting hole 13 located on the housing. The first fastener 411 passes through the first connecting hole 321 and is fixed in the second connecting hole 13, thereby realizing the fixed connection between the circuit board bracket 32 ​​and the housing 1. Furthermore, the circuit board bracket 32 ​​can also press the PCB board 31 onto the housing. In other words, the first fastening structure 41 does not require mounting holes on the PCB board 31. By tightening the circuit board bracket 32 ​​at that location using the first fastener 411 (e.g., a screw), the first fastener 411 generates axial pressure (which can be understood as generating pressure along its length) to fix the circuit board bracket 32 ​​to the housing. The circuit board bracket 32 ​​also presses the PCB board 31 tightly onto the housing, thereby achieving reliable fixation of the PCB board 31 within the terminal device 100 and ensuring installation reliability.

[0148] Furthermore, in response to the increasingly compact internal space of terminal devices 100, for example, Figures 5-6bAs shown, the battery 22 is becoming increasingly larger, occupying more space inside the terminal device 100. This inevitably compresses the layout space of the circuit board assembly 3. Considering that the PCB board 31 in the circuit board assembly 3 needs to accommodate various functional components and has complex wiring design, it is difficult to reserve sufficient installation space for the fastening structure (i.e., the fastening structure 4 is installed by opening mounting holes on the PCB board 31. At this time, the mounting holes need to be a certain distance from the edge of the PCB board 31 to ensure the structural reliability of the fastening structure 4 and the PCB board 31). Therefore, a first fastening structure 41 can be adopted, which achieves stable fixation of the PCB board 31 without occupying space on the PCB board 31. This allows the circuit board assembly 3 to no longer be limited by the insufficient internal space of the terminal device 100, and allows for more flexible design of the PCB board 31 layout and the installation layout of functional components. Furthermore, the design of the first fastening structure 41 does not require mounting holes on the PCB board 31, and does not occupy structural space on the PCB board 31, which helps to save on the production and processing of the PCB board 31 and save costs.

[0149] Specifically, in one possible implementation, such as Figure 6a and Figure 6b As shown, and in combination Figure 1c It is understood that when the distance D between the battery 22 and the vibration motor 23 becomes smaller and smaller, at the location of the first corner 1031 of the bottom region 103, there is not enough space to reserve a hole on the second PCB board 521 (i.e., circuit board 31) in the second circuit board assembly 52. ​​At this time, a first fastening structure 41 is set at the first corner 1031. That is, in the area where the first corner 1031 is located, the second PCB board 521 is not set at the location corresponding to the first fastening structure 41. The first fastener 411 of the first fastening structure 41 directly passes through the first connecting hole 321 on the circuit board bracket 32 ​​and the second connecting hole 13 on the housing 1. The axial pressure generated by the first fastener 411 directly presses the circuit board bracket 32 ​​onto the second PCB board 521 on the housing 1, without the need to drill holes on the second PCB board 521 for installation and fixation, thus achieving reliable fixation between the circuit board assembly 3 and the housing 1. In this way, the second PCB board 521 can be stably and reliably installed and fixed within the terminal device 100, while also saving space on the second PCB board 521, simplifying the installation process, saving costs, and reducing the space occupied by the entire machine stack, making the layout more flexible.

[0150] It is understandable that, such as Figure 6a and Figure 6bAs shown, the circuit board support 32 is usually made of metal, which has good structural strength and ductility and is not easily damaged. Therefore, holes are drilled in the circuit board support 32, that is, the first connecting hole 321 is set. At this time, the distance between the first connecting hole 321 and the edge of the circuit board support 32 is small, but it will not damage the structural strength of the circuit board support 32 itself, and can still stably press the second PCB board 521 onto the housing 1.

[0151] On the other hand, it is understandable that in the area where the first fastening structure 41 is located, along the thickness direction Z2 of the PCB board, the stacking space of the PCB board thickness is saved. In one example, this space can be used to create a more reliable grounding structure, thereby improving the reliability and security of the terminal device 100. This will be explained in detail later.

[0152] In summary, the terminal device provided in this application embodiment can achieve stable and reliable installation and fixation of the PCB board under the condition of limited internal installation space, which can improve the structural stability and layout rationality of the whole machine.

[0153] It should be noted that the number of first fastening structures 41 provided in the terminal device 100 is not limited in this embodiment. Those skilled in the art can set it reasonably according to actual needs.

[0154] Furthermore, the embodiments of this application do not limit the location of the first fastening structure 41. One possible implementation is as follows: Figure 1c and Figure 3a As shown, at least one first fastening structure 41 in the second circuit board assembly 52 is located at a first corner 1031 of the bottom region 103, which is a corner of the bottom region 103 that connects to the battery compartment region 102. In another possible implementation, at least one first fastening structure 41 in the first circuit board assembly 51 is located at a first corner 1011 of the top region 101, which is a corner of the top region 101 that connects to the battery compartment region 102. In yet another possible implementation, as... Figure 1c As shown, at least one first fastening structure 41 in the first circuit board assembly 51 is located at the first corner 1011 of the top region 101, while at least one first fastening structure 41 in the second circuit board assembly 52 is located at the first corner 1031 of the bottom region 103.

[0155] Furthermore, this application does not limit the type or specific structure of the first fastener 411. In one possible implementation, the first fastener 411 is a screw, as screw fastening is a common process in end products and is easy to operate. In other possible implementations, the first fastener 411 can also be a bolt, nut, etc.

[0156] It is understandable that PCB board 31 is usually equipped with reinforcing plates to strengthen the structure and ensure the reliability of PCB board 31. The following text will provide a detailed description of the circuit board assembly 3 equipped with reinforcing plates.

[0157] Please see Figure 8a and Figure 8b , Figure 8a This is a schematic diagram of the structure of the first reinforcing sheet in the terminal device according to an embodiment of this application. Figure 8b for Figure 8a A cross-sectional view along the CC direction.

[0158] One possible implementation is, such as Figures 5-7b As shown, the circuit board assembly 3 also includes a first reinforcing piece 33 corresponding to the first fastening structure 41. The first reinforcing piece 33 can improve the mechanical strength of the PCB board 31 in a specific area, prevent functional components from falling off or circuits from breaking, and can also participate in heat dissipation, thereby improving the stability and reliability of the circuit board assembly 3.

[0159] like Figures 6b-7b As shown, the first reinforcing piece 33 includes a first reinforcing portion 331 and a second reinforcing portion 332 that are connected and relatively fixed. The first reinforcing portion 331 is mounted on the first surface 313 of the PCB board 31 and is stacked between the PCB board 31 and the circuit board support 32 along the thickness direction Z2 of the PCB board. The first surface 313 is a surface of the PCB board facing the circuit board support 32 along its thickness direction Z2. The second reinforcing portion 332 is located outside the outer edge 312 of the PCB board 31 and is stacked between the housing 1 and the circuit board support 32 along the thickness direction Z2 of the PCB board.

[0160] like Figure 6bAs shown, the first fastening structure 41 may further include a third connecting hole 3321. The third connecting hole 3321 is disposed in the second reinforcing portion 332. The first fastener 411 passes through the first connecting hole 321 and the third connecting hole 3321 in sequence and is fixed in the second connecting hole 13, so that the circuit board bracket 32 ​​and the second reinforcing portion 332 are fixedly connected to the housing 1 by the first fastening structure 41, and the circuit board bracket 32 ​​presses the first reinforcing piece 33 and the PCB board 31 against the housing along the thickness direction Z2 of the PCB board. In this way, the third connecting hole 3321 is provided in the second reinforcing portion 332 of the first reinforcing piece 33, through which the first fastener 411 can pass, so that the circuit board bracket 32 ​​and the second reinforcing portion 332 are fixedly connected to the housing. The circuit board bracket 32 ​​and the second reinforcing portion 332 are tightened by the first fastener 411 (e.g., screw), so that the second reinforcing portion 332 and the first reinforcing portion 331 together generate a downward force to tightly press the PCB board 31, thereby completing the fixation of the PCB board 31 and ensuring installation reliability. The second reinforcing part 332 of the first reinforcing piece 33 is located outside the outer edge 312 of the PCB board 31. The first fastener 411 used for installation and fixation does not occupy space resources on the PCB board 31. While enhancing the structure of the circuit board assembly 3, it can also better overlap between the circuit board support 32 and the housing 1. It can be used in combination according to different structures to make full use of the stacking space inside the terminal device 100, ensuring the installation reliability of the circuit board assembly 3 and improving the layout flexibility.

[0161] It is understandable that, such as Figure 6a and Figure 6b As shown, the first reinforcing plate 33 is usually made of metal, which has good structural strength and ductility and is not easily damaged. Therefore, a hole is drilled in the first reinforcing plate 33, that is, a third connecting hole 3321 is provided. At this time, although the third connecting hole 3321 is small in distance from the edge of the first reinforcing plate 33, it will not damage the structural strength of the first reinforcing plate 33 itself. It can still work together with the circuit board bracket 32 ​​to stably press the second PCB board 521 onto the housing 1 under the action of the first fastening structure 41.

[0162] It should be noted that the specific structure of the first reinforcing sheet 33 is not limited. In one possible implementation, such as... Figure 7a and Figure 8a As shown, the first reinforcing sheet 33 is configured as an integrated sheet structure. In this way, the sheet structure can adapt to the compact stacking space inside the terminal device 100, which is conducive to the thin and light design of the terminal device 100. Furthermore, the integrated first reinforcing sheet 33 is easy to install, and it is easy to achieve structural reinforcement for local structures on the PCB board 31, which is convenient for positioning and processing.

[0163] In other possible implementations, the first reinforcing piece 33 can also be set as a split structure. In this case, the first reinforcing piece 33 can be locally set for different contact areas and the layout of electronic components on the PCB board 31, or the first reinforcing piece 33 can be spliced ​​locally. It also has the characteristics of high temperature resistance and corrosion resistance, which can improve mechanical strength and stability, and facilitate assembly and local reinforcement.

[0164] Furthermore, the specific material of the first reinforcing sheet 33 is not limited. The first reinforcing sheet 33 can be a reinforcing sheet made of conductive material (e.g., metallic material); or it can be a reinforcing sheet made of both conductive and non-conductive materials (e.g., polyimide).

[0165] In one possible implementation, the first reinforcing piece 33 is made of metal (e.g., stainless steel, aluminum, etc.). The metal first reinforcing piece 33 offers structural stability, high reliability, and aids in heat dissipation for the circuit board assembly 3. It also provides electromagnetic shielding and can participate in signal transmission (e.g., grounding signals), achieving multifunctionality within a single structure. In one example, the first reinforcing piece 33 is a steel sheet.

[0166] Those skilled in the art will understand that the first reinforcing sheet may not be provided in the circuit board assembly 3, and the embodiments of this application do not limit this. Specific details regarding this part will be discussed below. Figures 11a-11c Please elaborate.

[0167] The above mainly describes the specific structure of the first fastening structure 41. The following text will provide a detailed explanation of how the circuit board assembly 3 achieves the grounding function.

[0168] Please see Figure 9 , Figure 9 This is a schematic diagram of the circuit board bracket in the terminal device of this application embodiment.

[0169] like Figure 6b , Figure 8a and Figure 8b As shown, the second reinforcing portion 332 of the first reinforcing piece 33 has a protruding first contact portion 3322, which contacts the housing so that the first reinforcing piece 33 is electrically connected to the housing 1.

[0170] Specifically, such as Figure 6b As shown, and in combination Figure 2aIt is understood that the conductive portion of the housing 1 can serve as the reference ground of the terminal device 100. The first contact portion 3322 of the second reinforcing portion 332 contacts and is electrically connected to the housing, enabling the PCB board 31 to be electrically connected to the conductive portion of the housing 1 in sequence through the first reinforcing portion 331, the second reinforcing portion 332, and the first contact portion 3322 of the first reinforcing piece 33, thereby grounding the PCB board 31. At the same time, it also enables the circuit board support 32 to be electrically connected to the conductive portion of the housing 1 in sequence through the second reinforcing portion 332 and the first contact portion 3322, thereby grounding the circuit board support 32.

[0171] Furthermore, the second reinforcing portion 332 is provided with a first contact portion 3322. On the one hand, it can more stably connect to the housing 1, improving the reliability of the circuit board assembly 3. On the other hand, grounding is achieved using the first reinforcing piece 33, eliminating the need for additional structures (e.g., conductive pads) to achieve the grounding function. This replaces the traditional solution of grounding through conductive pads, allowing the first reinforcing piece 33 to directly connect to the conductive part of the housing through the first contact portion 3322 to achieve the grounding function. This not only reduces the space occupied inside the terminal device 100, but also simplifies the installation process, reduces the number of parts, and effectively reduces or avoids grounding problems caused by loosening or poor contact due to other structures, ensuring the reliability and safety of the terminal device 100.

[0172] like Figure 8a and Figure 8b As shown, in one possible implementation, the first contact portion 3322 is configured as a protrusion that protrudes beyond the surface of the second reinforcing portion 332 away from the circuit board support 32, and the protrusion and the second reinforcing portion 332 are configured as an integral structure. This can make the electrical connection between the first reinforcing piece 33 and the housing 1 more stable, and can further improve the reliability of the circuit board assembly 3.

[0173] In one example, the first contact portion 3322 is configured as a protrusion, which can be achieved through techniques such as electroplating or ball bonding, so that the protrusion protrudes from one side of the surface of the second reinforcing portion 332, thereby giving it good conductivity and stable connection with the housing 1. It should be noted that the shape of the protrusion is not limited and can be circular, rectangular, or irregular, etc. Those skilled in the art will understand that the first contact portion 3322 only needs to be able to achieve stable grounding.

[0174] In other possible implementations, the first contact portion 3322 is configured as a conductive layer (not shown in the figure). The conductive layer covers the surface of the second reinforcing portion 332 facing away from the circuit board support 32. This conductive layer is electrically connected to the housing 1 without the need for additional structural components to achieve grounding. This improves the reliability and safety of the circuit board assembly 3, simplifies the installation process, and reduces the space occupied inside the terminal device 100. In one example, the conductive layer is formed by processes such as nickel plating or gold plating.

[0175] Furthermore, such as Figure 6b , Figure 8a and Figure 8b As shown, there are multiple first contact portions 3322. This application embodiment does not limit the number of first contact portions 3322, and those skilled in the art can reasonably configure them according to actual needs. The multiple first contact portions 3322 are disposed on the portion of the second reinforcing portion 332 located around the third connecting hole 3321, and are spaced apart circumferentially along the third connecting hole 3321. In this way, the first reinforcing piece 33 is electrically connected to the conductive portion of the housing 1 through the spaced-apart first contact portions 3322, which can more reliably realize the grounding function of the PCB board 31 and achieve signal grounding integrity within the terminal device 100. It should be noted that a single first contact portion 3322 can also be provided; this application embodiment does not limit the number of first contact portions 3322.

[0176] It should be noted that the first contact portion 3322 can also be located at other positions on the first reinforcing piece 33 to replace a portion of the conductive pads in the circuit board assembly 3 and directly achieve grounding. This can reduce the space occupied by the conductive pads within the stacking space of the terminal device 100 and simplify the installation process.

[0177] It should be noted that the specific structure for grounding on the circuit board bracket 32 ​​is not limited. One possible implementation is as follows: Figure 6b and Figure 9 As shown, a second contact portion 324 is provided on the surface of the circuit board support 32 near the first reinforcing piece 33. The second contact portion 324 contacts the second reinforcing portion 332 of the first reinforcing piece 33, so that the circuit board support 32 is electrically connected to the second reinforcing portion 332 of the first reinforcing piece 33. Thus, the circuit board support 32 is electrically connected to the conductive part of the housing 1 in sequence through the second contact portion 324, the second reinforcing portion 332, and the first contact portion 3322, thereby grounding the circuit board support 32.

[0178] The specific structure of the second contact portion 324 is not limited. In one possible implementation, such as... Figure 9As shown, the second contact portion 324 can be configured as a sheet-like structure. This sheet-like structure can be a conductive pad or a similar structure, and this embodiment does not impose any limitations on it. In one example, the second contact portion 324 is configured as a ring of the same size as the second reinforcing portion 332 on the surface of the circuit board support 32 near the first reinforcing piece 33, facilitating installation. The second contact portion 324 and the circuit board support 32 can be configured as an integral structure or as a separate structure, and this embodiment does not impose any limitations on it. In one example, the second contact portion 324 and the circuit board support 32 are an integral structure, which improves the reliability of grounding.

[0179] In another possible implementation, the second contact portion 324 may also adopt the specific structure of the first contact portion 3322 mentioned above, which will not be described in detail here.

[0180] Furthermore, in one possible implementation, the ground layer of the PCB board 31 (i.e., a metal layer serving as the ground layer) can be electrically connected to the conductive structure in the first reinforcing portion 331 of the first reinforcing piece 33, thereby making the ground layer of the PCB board 31 electrically connected to the conductive portion of the housing 1 in sequence through the conductive structure of the first reinforcing portion 331 of the first reinforcing piece 33, the conductive structure of the second reinforcing portion 332, and the first contact portion 3322, so that the PCB board 31 is grounded.

[0181] The following section will provide a detailed description of the specific structure of the circuit board support 32 and the cooperation between the circuit board assembly 3 and the housing 1.

[0182] Please see Figure 10 , Figure 10 This is a schematic diagram of the structure of a portion of the housing in the terminal device according to an embodiment of this application.

[0183] It is understood that the specific structure of the circuit board bracket 32 ​​is not limited, and those skilled in the art can reasonably set it according to the specific layout of the electronic components within the terminal device 100. In one example, the circuit board bracket 32 ​​is set as an integrated structure, including a bracket body and a bracket mounting platform. The bracket mounting platform can be reasonably set with openings according to the layout of different electronic components on the PCB board 31, so as to avoid affecting the normal operation of electronic components while strengthening the structure. It should be noted that the surfaces of the bracket body and the bracket mounting platform in the thickness direction Z2 of the PCB board may be on the same plane or may not be on the same plane (see [reference]). Figure 6b and Figure 9 This application does not limit the scope of the embodiments.

[0184] In one possible implementation, such as Figure 9As shown, the circuit board bracket 32 ​​includes a bracket body 322 and a first bracket mounting platform 3231 connected to the bracket body 322. A first connecting hole 321 is provided on the first bracket mounting platform 3231, and a second contact portion 324 may be provided on its periphery to realize the grounding of the circuit board bracket 32.

[0185] It is understood that the specific structure of the housing 1 in the terminal device 100 is not limited, and those skilled in the art can reasonably set it according to the specific layout of the electronic components inside the terminal device 100.

[0186] In one possible implementation, such as Figure 10 As shown, and in combination Figure 3a , Figure 3b and Figure 6b As shown, at the location of the first corner 1031 of the bottom region 103, the housing 1 includes a support platform 141 and a fixing platform 142 corresponding to the circuit board assembly 3. In one example, the support platform 141 and the fixing platform 142 are formed on the middle plate 112 of the middle frame 11. It should be noted that the support platform 141 and the fixing platform 142 can be an integral structure or a separate structure from the middle plate 112. This application embodiment does not limit this.

[0187] Among them, such as Figure 6b and Figure 10 As shown, and in combination Figure 3a and Figure 3b It is understood that the support platform 141 has a support surface 1411 for supporting the PCB board 31, and the fixing platform 142 protrudes from the support surface 1411 of the support platform 141 in the thickness direction Z2 of the PCB board. That is, the support platform 141 can support the PCB board 31, while the fixing platform 142 is slightly higher than the support surface 1411 of the support platform 141 in the thickness direction Z2 of the PCB board. Furthermore, the surface of the fixing platform 142 facing the circuit board support 32 and the surface of the PCB board 31 facing the circuit board support 32 can be located on the same plane, thereby better securing the first fastener 411 and effectively limiting the PCB board 31, the first fastening structure 41, and the first reinforcing piece 33. At this time, the second connecting hole 13 is provided in the fixing platform 142, and the first bracket mounting platform 3231 is pressed against the fixing platform 142 by the first fastening structure 41, so that the circuit board support 32 presses the PCB board 31 against the support platform 141. In this way, the housing 1 is provided with a support platform 141 and a fixing platform 142 at the fixing position of the circuit board assembly 3 (i.e. the position where the first fastening structure 41 is located), and the first bracket mounting platform 3231 of the circuit board bracket 32 ​​is provided with a first connecting hole 321, which can more accurately and reliably press the PCB board 31 to the housing 1 and limit the possible displacement or loosening of the PCB board 31 within the terminal device 100, thereby improving the reliability of the circuit board assembly 3.

[0188] Furthermore, such as Figure 6b As shown, when the circuit board assembly 3 includes the first reinforcing piece 33, the first bracket mounting platform 3231 presses the second reinforcing part 332 of the first reinforcing piece 33 against the fixing platform 142 through the first fastening structure 41, so that the circuit board bracket 32 ​​presses the first reinforcing part 331 of the first reinforcing piece 33 and the PCB board 31 against the support platform 141.

[0189] In one possible implementation, such as Figure 6b , Figure 7b and Figure 10 As shown, the PCB board 31 is provided with a positioning part 314, and the housing 1 is provided with a positioning part 143 at the position corresponding to the positioning part 314, which facilitates the better and faster positioning and installation of the PCB board 31 during the installation process, and also reduces the risk of displacement or loosening of the PCB board 31 during use.

[0190] Please see Figures 11a to 11c , Figure 11a This is a schematic diagram of the area where the first fastening structure of the terminal device is located, according to an embodiment of this application. Figure 11b This is a second schematic diagram showing the area where the first fastening structure of the terminal device is located, according to an embodiment of this application. Figure 11c This is a schematic diagram of the area where the first fastening structure of the terminal device is located, according to an embodiment of this application.

[0191] It should be noted that, among other possible implementation methods, such as Figure 11c As shown, the surface of the mounting platform 142 facing the circuit board support 32 and the surface of the PCB board 31 facing the circuit board support 32 can also be located on different planes. Further, as... Figure 11a As shown, the fixing platform 142 may not protrude from the support surface 1411 of the support platform 141 in the thickness direction Z2 of the PCB board. For example, the surface of the fixing platform 142 facing the circuit board bracket 32 ​​is aligned with the support surface 1411 of the support platform 141.

[0192] It should be noted that the embodiments of this application do not limit the specific structure of the fit between the circuit board bracket 32 ​​and the housing 1. For example... Figures 11a to 11c When the PCB board 31 does not have mounting holes, different mating structures can be provided between the circuit board bracket 32 ​​and the housing 1. One possible implementation is as follows: Figure 11a As shown, a portion of the structure of the circuit board support 32 (e.g., Figure 9 The upper and lower surfaces of the first support mounting platform 3231 can be flush with the two side surfaces of the PCB board in its thickness direction Z2, so that the circuit board support 32 can press the PCB board 31. In other possible implementations, such as Figure 11b and Figure 11cAs shown, both the circuit board bracket 32 ​​and the housing 1 can protrude relative to other main parts to form a mounting platform or fixing platform, thereby better pressing the PCB board.

[0193] It is understandable that a reinforcing piece (e.g., a first reinforcing piece) may or may not be provided between the circuit board support 32 and the PCB board 31. When the first fastening structure 41 is used to fix the circuit board assembly 3, if the first reinforcing piece is not provided between the circuit board support 32 and the PCB board 31, such as... Figures 11a-11c As shown, the ground layer on the PCB board 31 can be directly electrically connected to the conductive part of the housing 1 through the conductive part (i.e. the exposed copper part) on the surface of the PCB board 31, or it can be electrically connected to the housing 1 through the circuit board bracket 32, thereby achieving grounding. The circuit board bracket 32 ​​can be electrically connected to the housing 1 through the position that contacts the housing 1, thereby achieving grounding. This application embodiment does not limit this.

[0194] The above text mainly describes in detail the specific structure of the first fastening structure 41 in the terminal device 100. It is understood that in the terminal device 100, such as... Figure 1c As shown, the first circuit board assembly 51 can be configured as a circuit board assembly 3 with a first fastening structure 41, or the second circuit board assembly 52 can also be configured as a circuit board assembly 3 with a first fastening structure 41, or both the first circuit board assembly 51 and the second circuit board assembly 52 can be configured as a circuit board assembly 3 with a first fastening structure 41.

[0195] It should be noted that the plurality of fastening structures 4 may further include second fastening structures 42, wherein the number of second fastening structures 42 is not limited. Specifically, the first circuit board assembly 51 may be provided with a second fastening structure 42, or the second circuit board assembly 52 may also be provided with a second fastening structure 42, or both the first circuit board assembly 51 and the second circuit board assembly 52 may be provided with a second fastening structure 42. This application embodiment does not impose any limitations in this regard.

[0196] Furthermore, in the terminal device 100, among the multiple fastening structures 4 of the circuit board assembly 3, some fastening structures 4 can be configured as first fastening structures 41, and some fastening structures 4 can be configured as second fastening structures 42, or all fastening structures 4 can be configured as first fastening structures 41. This application embodiment does not limit this. The second fastening structure 42 will be described in detail below.

[0197] It should be noted that the specific structural form of the second fastening structure 42 is not limited. In one possible implementation, the second fastening structure 42 adopts a threaded connection (e.g., screw) fastening structure, which presses and fixes the PCB board 31 to the housing 1 through the circuit board bracket 32. In another possible implementation, the second fastening structure 42 can also adopt a snap-fit ​​or adhesive fastening structure. For example, the circuit board bracket 32 ​​is designed with snaps or elastic hooks, which can cooperate with the slots or positions on the housing 1 (not shown in the figure) to firmly fix the circuit board bracket 32 ​​inside the housing 1. Alternatively, the PCB board 31 can be fixed to the circuit board bracket 32 ​​by adhesive, welding, or other methods, and then the circuit board bracket 32 ​​can be fixedly connected to the housing 1. It is understood that the PCB board 31 can be fixedly connected to the circuit board bracket 32 ​​and the housing 1 by various methods such as threaded connection, snap-fit, and adhesive. It should be noted that when there are multiple second fastening structures, the structural forms of each second fastening structure can be the same or different, and the embodiments of this application do not limit this.

[0198] The following section primarily uses a second fastening structure that achieves fixation through a threaded connection as an example.

[0199] Please see Figure 12a and Figure 12b , Figure 12a This is a top view schematic diagram of the second fastening structure in the terminal device according to an embodiment of this application. Figure 12b for Figure 12a A cross-sectional view along the DD direction.

[0200] like Figure 12a and Figure 12b As shown, the circuit board assembly 3 may also include a second reinforcing piece 34, and the second fastening structure 42 includes a second fastener 421, a fourth connecting hole 325 on the circuit board support 32, a fifth connecting hole 15 on the housing 1, a sixth connecting hole 341 on the second reinforcing piece 34, and a mounting hole 315 on the PCB board 31. The second fastener 421 passes through the fourth connecting hole 325, the sixth connecting hole 341, the mounting hole 315, and the fifth connecting hole 15 in sequence. The circuit board support 32 and the second reinforcing piece 34 can be tightened by the second fastener 421, so that the axial pressure generated by the second fastener 421 can tightly press the PCB board 31, and fix the circuit board assembly 3 to the housing 1 (e.g., the support platform 141 of the housing 1).

[0201] It should be noted that the second reinforcing sheet 34 and the first reinforcing sheet 33 can be configured as an integral structure or as a separate structure, and this application embodiment does not limit this.

[0202] In other possible implementations, the second reinforcing piece 34 may not be provided in the circuit board assembly 3. In this case, the second fastener 421 passes through the fourth connecting hole 325, the mounting hole 315 and the fifth connecting hole 15 in sequence. The circuit board bracket 32 ​​can be tightened by the second fastener 421, so that the axial pressure generated by the second fastener 421 can tightly press the PCB board 31 and fix the circuit board assembly 3 to the housing 1.

[0203] Furthermore, in one possible implementation, such as Figure 12b As shown, the circuit board bracket 32 ​​also includes a second bracket mounting platform 3232, which is connected to and fixed relative to the bracket body. A fourth connecting hole 325 is provided on the second bracket mounting platform 3232 of the circuit board bracket 32. In one example, the second bracket mounting platform 3232 and the bracket body 322 are configured as an integral structure.

[0204] It should be noted that when making mounting holes 315 on PCB board 31, the structural strength requirements of PCB board 31 itself must be taken into account. That is, the first mounting hole 315 should be a certain distance away from the periphery of PCB board 31 to avoid damage to PCB board 31 during tightening and installation and use, which would affect the reliability of terminal equipment 100.

[0205] Furthermore, to ensure the integrity of the grounding of the circuit board assembly 3 at the location where the second fastening structure 42 is installed, such as... Figure 12a and Figure 12b As shown, in one possible implementation, a conductive pad 35 is provided between the circuit board support 32 and the second reinforcing piece 34, and between the PCB board 31 and the housing 1. The PCB board 31 can be electrically connected to the conductive part of the housing 1 through the lower conductive pad 35, thus grounding the PCB board 31. At the same time, the circuit board support 32 can also be electrically connected to the conductive part of the housing 1 in sequence through the upper conductive pad 35, the second reinforcing piece 34, the PCB board 31 (with copper leakage treatment in the corresponding area), and the lower conductive pad 35, thus grounding the circuit board support 32. This ensures the stability of signal transmission and the safety of the circuit in the circuit board assembly 3 in the terminal device 100.

[0206] It should be noted that the specific structures of the second fastener 421 and the second reinforcing piece 34 in the second fastening structure 42 can be designed with reference to the first fastener 411 and the first reinforcing piece 33 described above. This application embodiment will not repeat the details.

[0207] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A terminal device comprising a housing and a circuit board assembly, the circuit board assembly comprising a PCB board and a circuit board support provided on one side of the PCB board in a thickness direction thereof, a plurality of fastening structures being provided between the circuit board support and the housing to cause the circuit board support to fixedly mount the PCB board to the housing, the plurality of fastening structures being spaced apart in a plane perpendicular to the thickness direction of the PCB board, characterized in that, The plurality of fastening structures includes a first fastening structure, and the area of ​​the PCB board corresponding to the first fastening structure is configured to provide a clearance space for the first fastening structure, and the first fastening structure is located outside the outer edge of the PCB board. The first fastening structure includes a first fastener, a first connecting hole, and a second connecting hole. The first connecting hole is disposed in the circuit board bracket, and the second connecting hole is disposed in the housing. The first fastener passes through the first connecting hole and is fixed in the second connecting hole, so that the circuit board bracket is fixedly connected to the housing through the first fastening structure, and the circuit board bracket presses the PCB board against the housing along the thickness direction of the PCB board.

2. The terminal device according to claim 1, characterized by The circuit board assembly further includes a first reinforcing piece corresponding to the first fastening structure. The first reinforcing piece includes a first reinforcing portion and a second reinforcing portion that are connected and relatively fixed to each other. The first reinforcing portion is installed on the first surface of the PCB board and is stacked between the PCB board and the circuit board support in the thickness direction of the PCB board. The first surface is the surface of the PCB board facing the circuit board support along its thickness direction. The second reinforcing portion is located on the outer side of the outer edge of the PCB board and is stacked between the housing and the circuit board support in the thickness direction of the PCB board; The first fastening structure further includes a third connecting hole, which is disposed in the second reinforcing part. The first fastener passes through the first connecting hole and the third connecting hole in sequence and is fixed in the second connecting hole, so that the circuit board bracket and the second reinforcing part are fixedly connected to the housing through the first fastening structure, and the circuit board bracket presses the first reinforcing piece and the PCB board against the housing along the thickness direction of the PCB board.

3. The terminal device according to claim 2, characterized by The second reinforcing portion is provided with a first contact portion, which contacts the housing to make the first reinforcing piece electrically connected to the housing.

4. The terminal device according to claim 3, characterized by The first contact portion is configured as a protrusion, the protrusion protrudes from the surface of the second reinforcing portion away from the circuit board bracket, and the protrusion and the second reinforcing portion are configured as an integral structure; Alternatively, the first contact portion may be configured as a conductive layer covering the surface of the second reinforcing portion.

5. The terminal device according to claim 3, characterized by The first contact portion has multiple first contact portions, which are disposed on the portion of the second reinforcing portion located around the third connecting hole and are spaced apart circumferentially along the third connecting hole.

6. The terminal device of claim 2, wherein, The first reinforcing sheet is configured as an integral sheet structure, and the material of the first reinforcing sheet is metal.

7. The terminal device according to any one of claims 1-6, characterized by The circuit board support includes a support body and a first support mounting platform connected to the support body; The housing includes a support platform and a fixing platform corresponding to the circuit board assembly. The support platform has a support surface for supporting the PCB board, and the fixing platform protrudes from the support surface of the support platform in the thickness direction of the PCB board. The first connecting hole is provided on the first bracket mounting platform, and the second connecting hole is provided on the fixed platform. The first bracket mounting platform is pressed against the fixed platform by the first fastening structure, so that the circuit board bracket presses the PCB board against the support platform. When the circuit board assembly includes a first reinforcing piece, the first bracket mounting platform presses the second reinforcing portion of the first reinforcing piece against the fixing platform through the first fastening structure, so that the circuit board bracket presses the first reinforcing portion of the first reinforcing piece and the PCB board against the support platform.

8. The terminal device according to any one of claims 1-6, characterized by The housing includes a top region, a battery compartment region, and a bottom region arranged sequentially along the length of the terminal device. The terminal device also includes a first circuit board assembly, a second circuit board assembly, and a battery. The first circuit board assembly is fixed to the top region, the battery is fixed to the battery compartment region, and the second circuit board assembly is fixed to the bottom region. The first circuit board assembly and / or the second circuit board assembly are configured as circuit board assemblies having the first fastening structure.

9. The terminal device according to claim 8, characterized by At least one of the first fastening structures in the first circuit board assembly is located at a first corner of the top region, the first corner being a corner of the top region that is connected to the battery compartment region; At least one of the first fastening structures in the second circuit board assembly is located at a first corner of the bottom region, the first corner of the bottom region being a corner of the bottom region that connects with the battery compartment region; The terminal device also includes a vibration motor, which is installed in the bottom region, with a first corner of the bottom region located between the vibration motor and the battery compartment region.

10. The terminal device according to any one of claims 1-6, characterized by The housing includes a middle frame, the middle frame includes a middle plate and a frame connected to the outer periphery of the middle plate, and the PCB board is fixedly mounted on the middle plate of the middle frame.

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