Middle frame component and terminal device

Abstract

The application discloses a middle frame component and a terminal device. The middle frame component comprises a middle frame, a circuit board assembly and a fixing member. The fixing member is provided with a receiving cavity and a through hole penetrating through the side wall of the receiving cavity, and the receiving cavity is provided with an opening and a first pressure receiving surface arranged opposite to the opening. The circuit board assembly comprises a flexible circuit board. Part of the flexible circuit board is fixed to the first pressure receiving surface, so that the electric connector is arranged towards the opening. Part of the flexible circuit board passes through the through hole and is arranged outside the middle frame. The fixing member is fixedly connected with the middle frame and fixes part of the flexible circuit board to the middle frame. The flexible circuit board on the middle frame component is fixed firmly, the thickness space of the middle frame can be fully utilized to accommodate the flexible circuit board, the electronic devices inside the terminal device are arranged compactly, and thus the miniaturization development of the terminal device is facilitated.

Description

Technical Field

[0001] This disclosure relates to the field of electronic technology, and in particular to a mid-frame component and a terminal device. Background Technology

[0002] Mobile phones, tablets, smartwatches, and other terminal devices have become indispensable technological products in people's lives, studies, and entertainment. With the development of terminal devices, their integration is becoming increasingly sophisticated. At the same time, in order to adapt to miniaturization, the electronic components inside terminal devices are becoming more and more compact, placing higher demands on the utilization of internal space.

[0003] In related technologies, foldable terminal devices require the use of flexible circuit boards to connect electronic components in different locations. However, flexible circuit boards are subject to bending stress, and traditional fixing methods make it difficult to reliably fix the flexible circuit boards to the mid-frame. This is not conducive to the compact arrangement of electronic components inside the terminal device, and thus hinders the miniaturization of the terminal device. Summary of the Invention

[0004] This disclosure provides a mid-frame component and a terminal device. The flexible circuit board on the mid-frame component is securely fixed, and the thickness space of the mid-frame can be fully utilized to accommodate the flexible circuit board, making the electronic components inside the terminal device compact and thus facilitating the miniaturization of the terminal device.

[0005] The technical solution is as follows: According to a first aspect of the present disclosure, a mid-frame component is provided, including a mid-frame, a circuit board assembly, and a fastener. The fastener has a receiving cavity and a through hole penetrating a sidewall of the receiving cavity. The receiving cavity has an opening and a first pressure-bearing surface disposed opposite to the opening. The circuit board assembly includes a flexible circuit board. A portion of the flexible circuit board is adhered to the first pressure-bearing surface so that an electrical connector is disposed facing the opening. A portion of the flexible circuit board passes through the through hole and is disposed outside the mid-frame. The fastener is fixedly connected to the mid-frame and fixes a portion of the flexible circuit board to the mid-frame.

[0006] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: When this mid-frame component is applied to a terminal device, a portion of the flexible circuit board is adhered to the first pressure-bearing surface and further secured by fasteners, ensuring reliable fixation of the flexible circuit board to the mid-frame without being affected by bending stress. A portion of the flexible circuit board can pass through through-holes to connect with other electronic components. By placing the flexible circuit board within the mid-frame via a receiving cavity, the thickness of the mid-frame can be fully utilized to accommodate the flexible circuit board, resulting in a compact arrangement of electronic components within the terminal device and facilitating its miniaturization.

[0007] The technical solution of this disclosure will be further explained below: In one embodiment, the fastener is snapped into the middle frame.

[0008] In one embodiment, the fastener includes a body and a latching protrusion fixed to the body, and a slot communicating with the receiving cavity in the middle frame. The latching protrusion and the slot are locked together so that the body presses a portion of the flexible circuit board against the middle frame.

[0009] In one embodiment, there are at least three protrusions, spaced apart on the body. Each protrusion corresponds to a slot.

[0010] In one embodiment, the circuit board assembly further includes an electrical connector disposed on the flexible circuit board, the electrical connector being disposed toward the opening, the electrical connector including an electrical connection portion protruding from the flexible circuit board, and the body having a first clearance hole for avoiding the electrical connection portion.

[0011] In one embodiment, the receiving cavity includes a first groove and a second groove communicating with the first groove. The bottom surface of the first groove is provided with a first pressure-bearing surface, and a through hole is provided through the inner sidewall of the first groove. The second groove is located away from the first pressure-bearing surface, the second groove is provided with an opening, and the sidewall of the second groove is provided with a retaining groove. The fixing member also includes a connector that is bent and connected to the body, and the connector is fixedly provided with a retaining protrusion. The retaining protrusion is fixed to the body through the connector, and the body presses a portion of the flexible circuit board into the first groove.

[0012] In one embodiment, the inner wall of the second groove includes a second pressure-bearing surface spaced apart from the first pressure-bearing surface and a limiting surface spaced apart from the second pressure-bearing surface to form a slot. There are two limiting surfaces, spaced apart on both sides of the second pressure-bearing surface, to form two slots. The connector fits against the second pressure-bearing surface, and the locking protrusion is an elastic protrusion bent and connected to the connector. There are two elastic protrusions, spaced apart on both sides of the connector.

[0013] In one embodiment, the outer wall of the body is provided with a sealing layer, which is sealed in conjunction with the first groove to form a protective space that is not connected to the opening, and part of the flexible circuit board is sealed in the protective space.

[0014] In one embodiment, the sealing layer is provided to enclose the body.

[0015] In one embodiment, the first groove includes a first inner sidewall and a second inner sidewall disposed opposite to each other along its width direction. On the cross-section of the cavity in the width direction, a sealing layer is disposed covering the first pressure-bearing surface, and the sealing layer is press-fitted with the first inner sidewall and the second inner sidewall.

[0016] In one embodiment, at least one of the first inner sidewall and the second inner sidewall is provided with an annular groove, and a portion of the sealing layer is embedded in the annular groove.

[0017] In one embodiment, the sealing layer includes at least one annular protrusion that presses against the inner sidewall of the first groove.

[0018] In one embodiment, at least one of the fastener and the middle frame is provided with a sealing layer, which is at least partially disposed within the receiving cavity to form a protective space that is not in communication with the opening. A portion of the flexible circuit board is sealed within the protective space.

[0019] In one embodiment, the sealing layer is disposed on at least a portion of the outer sidewall of the fastener.

[0020] In one embodiment, the receiving cavity includes a first inner sidewall and a second inner sidewall disposed opposite to each other along its width direction. On the cross-section of the receiving cavity in the width direction, a sealing layer is disposed covering the first pressure-bearing surface, and the sealing layer is press-fitted with the first inner sidewall and the second inner sidewall.

[0021] In one embodiment, at least one of the first inner sidewall and the second inner sidewall is provided with an annular groove, and a portion of the sealing layer is embedded in the annular groove.

[0022] In one embodiment, the circuit board assembly further includes an electrical connector disposed on the flexible circuit board, the electrical connector being oriented toward the opening. The electrical connector includes an electrical connection portion protruding from the flexible circuit board, and a retainer has a first clearance hole that avoids the electrical connection portion. A sealing layer is sealingly fitted with the flexible circuit board so that the first clearance hole is not in communication with the protective space.

[0023] In one embodiment, the sealing layer includes at least one annular protrusion that presses against the sidewall of the receiving cavity. Alternatively, one of the sealing layers and the sidewall of the receiving cavity may have an annular groove, and the other may have an annular protrusion that seals against the annular groove.

[0024] In one embodiment, the sealing layer covers at least a portion of the fixing member. And / or, a first adhesive layer is provided between the sealing layer and the flexible circuit board, and the sealing layer is bonded and fixed to the flexible circuit board through the first adhesive layer, so that a portion of the flexible circuit board is sealed in the protective space.

[0025] In one embodiment, the circuit board assembly further includes a support plate, which is fixedly connected to the flexible circuit board and is disposed on the first pressure-bearing surface.

[0026] In one embodiment, the flexible circuit board is welded to the support plate, and the electrical connector is welded to the flexible circuit board. And / or, a second adhesive layer is provided between the support plate and the first pressure-bearing surface, and the support plate is bonded to the first pressure-bearing surface through the second adhesive layer.

[0027] According to a second aspect of the present disclosure, a terminal device is also provided, including a mid-frame component.

[0028] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: During assembly, the flexible circuit board can be reliably fixed to the mid-frame without being affected by bending stress, ensuring reliable electrical connections between the flexible circuit board and other electronic components, thereby improving the reliability of the terminal device. Furthermore, placing part of the flexible circuit board within the mid-frame allows full utilization of the frame's thickness to accommodate it, resulting in a compact arrangement of internal electronic components and facilitating the miniaturization of the terminal device.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0030] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0031] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a terminal device shown in one embodiment.

[0033] Figure 2 for Figure 1 A partial structural diagram of the middle frame component is shown.

[0034] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the middle frame component in the first cutting direction.

[0035] Figure 4 for Figure 2 The diagram shows a cross-sectional view of the middle frame component in the second cutting direction.

[0036] Figure 5 for Figure 2 The diagram shows the structure of the fastener.

[0037] Figure 6 for Figure 5 The diagram shows the structure of the fastener from a downward viewing angle.

[0038] Figure 7 for Figure 3 The diagram shows a cross-sectional view of the circuit board assembly.

[0039] Figure 8 for Figure 1 The diagram shows the hardware structure of the terminal device.

[0040] Explanation of reference numerals in the attached figures: 10. Terminal device; 11. Processing component; 12. Memory; 13. Power supply component; 14. Multimedia component; 15. Audio component; 16. Input / output interface; 17. Sensor component; 18. Communication component; 100. Mid-frame component; 110. Mid-frame; 111. Receiving cavity; 1111. Protective space; 101. Opening; 102. First pressure-bearing surface; 103. Slot; 104. First groove; 1041. First inner sidewall; 1042. Second inner sidewall; 1043. Annular groove; 105. Second groove; 1051, Second pressure-bearing surface; 1052, Limiting surface; 112, Through hole; 120, Circuit board assembly; 121, Flexible circuit board; 122, Electrical connector; 1201, Electrical connection part; 123, Support plate; 124, Second adhesive layer; 130, Fixing member; 131, Body; 1301, First clearance hole; 132, Locking protrusion; 133, Connector; 1302, Second clearance hole; 140, Sealing layer; 141, Annular protrusion; 150, First adhesive layer; 200, Control main board; 300, Flexible display screen. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and do not limit the scope of protection of this disclosure.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0043] Mobile phones, tablets, and other terminal devices have become indispensable technological products in people's lives, studies, and entertainment, bringing numerous conveniences and enjoyment. With the diversification of terminal device functions, there are now many types and brands available, offering consumers a wide range of choices. Simply improving the functional features of terminal devices is no longer sufficient to meet people's demands; the aesthetics of the terminal device's casing have also become a crucial factor influencing the competitiveness of electronic products. Among terminal devices with similar functions or performance, the more attractive the device's appearance, the more likely it is to attract consumers to purchase it.

[0044] As flexible displays become increasingly sophisticated, their application in terminal devices is becoming more widespread. Terminal devices using flexible displays offer a more aesthetically pleasing overall appearance and a better display experience, making them increasingly popular with consumers. Furthermore, some terminal devices utilize folding mechanisms to fold and unfold the flexible display. This allows the flexible display to be folded for easy portability, while its unfolded form provides a larger display area, further enhancing its appeal and making foldable terminal devices a growing trend.

[0045] In related technologies, to adapt to miniaturization, the electronic components inside terminal devices are becoming increasingly compact, demanding higher efficiency in utilizing internal space. Foldable terminal devices require flexible circuit boards (PCBs) to connect electronic components in different locations. However, flexible circuit boards are subject to bending stress, and traditional fixing methods struggle to reliably secure them to the frame, hindering the compact arrangement of internal electronic components and consequently impeding miniaturization. Furthermore, when foldable terminal devices use flexible circuit boards to electrically connect the flexible display screen and the control motherboard, insecure fixing of the PCB can affect the reliability of the connection and even damage the foldable terminal device.

[0046] Based on this, the present disclosure provides a mid-frame component that can make full use of the thickness space of the mid-frame to accommodate the flexible circuit board and reliably fix the flexible circuit board on the mid-frame, so that the electronic components inside the terminal device are arranged compactly, which is conducive to the miniaturization of the terminal device.

[0047] To better understand the mid-frame component of this disclosure, the following description is provided in conjunction with a terminal device that uses the aforementioned mid-frame component.

[0048] like Figures 1 to 5 The figures shown are structural views of a terminal device and its mid-frame component as illustrated in some embodiments. Figure 1 This is a schematic diagram of the structure of a terminal device shown in one embodiment. Figure 2 for Figure 1 A partial structural diagram of the middle frame component is shown. Figure 3 for Figure 2 The diagram shows a cross-sectional view of the middle frame component in the first cutting direction. Figure 4 for Figure 2 The diagram shows a cross-sectional view of the middle frame component in the second cutting direction. Figure 5 for Figure 2 The diagram shows the structure of the fastener.

[0049] like Figure 1 and Figure 2 As shown in the embodiments of this disclosure, a terminal device 10 is provided, including a mid-frame component 100.

[0050] like Figures 2 to 5 As shown, the middle frame component 100 includes a middle frame 110, a circuit board assembly 120, and a fastener 130. The fastener 130 has a receiving cavity 111 and a through hole 112 penetrating the sidewall of the receiving cavity 111. The receiving cavity 111 has an opening 101 and a first pressure-bearing surface 102 opposite to the opening 101. The circuit board assembly 120 includes a flexible circuit board 121. A portion of the flexible circuit board 121 is adhered to the first pressure-bearing surface 102 so that the electrical connector 122 faces the opening 101. A portion of the flexible circuit board 121 passes through the through hole 112 and is disposed outside the middle frame 110. The fastener 130 is fixedly connected to the middle frame 110 and fixes a portion of the flexible circuit board 121 to the middle frame 110.

[0051] Thus, when the mid-frame component 100 is applied to the terminal device 10, a portion of the flexible circuit board 121 is adhered to the first pressure-bearing surface 102 and further secured by the fastener 130, ensuring that the flexible circuit board 121 is not affected by bending stress and can be reliably fixed to the mid-frame 110. A portion of the flexible circuit board 121 can pass through the through-hole 112 to connect with other electronic components. Furthermore, by placing a portion of the flexible circuit board 121 within the mid-frame 110 via the receiving cavity 111, the thickness of the mid-frame 110 can be fully utilized to accommodate the flexible circuit board 121, resulting in a compact arrangement of electronic components inside the terminal device 10, which is beneficial for the miniaturization of the terminal device 10.

[0052] During assembly, the flexible circuit board 121 can be reliably fixed to the middle frame 110 without being affected by bending stress, ensuring reliable electrical connection between the flexible circuit board 121 and other electronic components, thereby improving the reliability of the terminal device 10. Furthermore, by partially placing the flexible circuit board 121 within the middle frame 110, the thickness of the middle frame 110 can be fully utilized to accommodate the flexible circuit board 121, resulting in a compact arrangement of electronic components inside the terminal device 10 and facilitating its miniaturization.

[0053] The terminal device 10 may include handheld devices, in-vehicle devices, wearable devices, monitoring devices, cellular phones, smartphones, personal digital assistant (PDA) computers, tablet computers, laptop computers, cameras, video recorders, cameras, smartwatches, smart wristbands, in-vehicle computers, and other terminal devices 10 with imaging capabilities.

[0054] like Figure 1 As shown, in some embodiments, the control motherboard 200 and the display screen are electrically connected to the control motherboard 200 via a flexible circuit board 121. Thus, the portion of the flexible circuit board 121 located on the middle frame 110 can be connected to the display screen, while the portion located outside the middle frame 110 can be connected to the control motherboard 200. The flexible circuit board 121 is reliably fixed to the middle frame 110 and will not easily move, ensuring a reliable connection between the flexible circuit board 121 and the display screen and improving the reliability of the terminal device 10.

[0055] Furthermore, in some embodiments, the terminal device 10 also includes a light-transmitting cover (not labeled) and a rear cover (not labeled). The light-transmitting cover is sealed to the front of the middle frame 110 to form a first sealed space for accommodating the display screen. The rear cover is disposed opposite to the light-transmitting cover and is sealed to the back of the middle frame 110 to form a second sealed space for accommodating the control motherboard 200. The first sealed space communicates with the second sealed space through a through hole 112, allowing one end of the flexible circuit board 121 to be connected to the display screen, and the other end to be connected to the control motherboard 200 through the through hole 112. In this way, the sealing performance of the terminal device 10 can be improved, reducing or minimizing the risk of dust or liquid ingress.

[0056] like Figure 2 as well as Figure 3 As shown, in some embodiments, the circuit board assembly 120 further includes an electrical connector 122 disposed on the flexible circuit board 121, with the electrical connector 122 facing the opening 101. Thus, the electrical connector 122 facilitates a detachable electrical connection between the flexible circuit board 121 and the display screen or other electronic devices, enabling modular assembly and convenient maintenance. Furthermore, the flexible circuit board 121 of this disclosure is securely fixed, preventing the electrical connector 122 from easily shifting, thereby ensuring a reliable electrical connection between the display screen and the control motherboard 200.

[0057] In addition, at least a portion of the electrical connector 122 is also accommodated by the receiving cavity 111, thereby making full use of the thickness space of the middle frame 110, which is conducive to the development of the terminal device 10 to be thinner and lighter.

[0058] Understandably, when the terminal device 10 is foldable, the display screen is a flexible display screen 300. The flexible circuit board 121 is firmly fixed so that the electrical connector 122 will not shift during the bending process of the flexible display screen 300, ensuring the reliability of the connection between the flexible display screen 300 and the control motherboard 200, which is beneficial to improving the durability of the foldable terminal device 10.

[0059] It should be noted that the control motherboard 200 includes a main control chip, which includes a processor. The processor can be a microcontroller unit (MCU), a central processing unit (CPU), or a digital signal processor (DSP), etc. In addition, the control motherboard 200 also includes a communication unit for communicating with other modules of the terminal device 10, such as the display screen of this disclosure.

[0060] It should be noted that there are various ways to achieve the fixed connection between the fastener 130 and the middle frame 110, including but not limited to snap-fit ​​fixing, screw fixing, etc.

[0061] In some embodiments, the fastener 130 is snap-fitted to the middle frame 110. This allows the fastener 130 to be quickly installed onto the central control unit, making it easy to implement and assemble.

[0062] It should be noted that there are several ways to achieve the buckle connection between the fastener 130 and the middle frame 110, including plug-in type, elastic hook type, press-type buckle type, splicing type buckle type, etc.

[0063] Furthermore, such as Figure 4 as well as Figure 5 As shown, in some embodiments, the fastener 130 includes a body 131 and a latching protrusion 132 fixed to the body 131. The middle frame 110 is provided with a latching groove 103 communicating with the receiving cavity 111. The latching protrusion 132 and the latching groove 103 are fastened together, so that the body 131 presses a portion of the flexible circuit board 121 onto the middle frame 110. In this way, the middle frame 110 can have both the receiving cavity 111 and the latching groove 103, which helps to reduce the manufacturing difficulty of the middle frame 110. The fastener 130 can achieve the fixation of the body 131 and the latching protrusion 132 in various ways, and then use the latching protrusion 132 and the latching groove 103 to fasten the body 131 to press a portion of the flexible circuit board 121 onto the middle frame 110. It is easy to implement and easy to assemble.

[0064] Optionally, in some embodiments, there are at least three protrusions 132, spaced apart on the body 131. The slots 103 correspond one-to-one with the protrusions 132. Thus, by using at least three protrusions 132 to engage with their corresponding slots 103, the body 131 can be secured to the middle frame 110 using at least three fixing points, ensuring that the fasteners 130 can reliably press and hold the flexible circuit board.

[0065] Optionally, the body 131 is in the shape of a rectangular plate, and at least one latching protrusion 132 is provided at each of its four corners.

[0066] In any embodiment of the above-described body 131, such as Figure 2 , Figure 3 as well as Figure 5 As shown, in some embodiments, the electrical connector 122 includes an electrical connection portion 1201 protruding from the flexible circuit board 121, and the body 131 is provided with a first clearance hole 1301 to avoid the electrical connection portion 1201. Thus, by providing the first clearance hole 1301, the electrical connection portion 1201 can be electrically connected to other electronic devices (such as the flexible display screen 300) through the first clearance hole 1301 without interfering with the connection function of the electrical connector 122, while simultaneously securing the flexible circuit board 121 firmly.

[0067] In any embodiment of the above-described body 131, such as Figure 3 as well as Figure 4 As shown, in some embodiments, the receiving cavity 111 includes a first groove 104 and a second groove 105 communicating with the first groove 104. The bottom surface of the first groove 104 is provided with a first pressure-bearing surface 102, and a through hole 112 is provided through the inner sidewall of the first groove 104. The second groove 105 is located away from the first pressure-bearing surface 102, and the second groove 105 is provided with an opening 101, and the sidewall of the second groove 105 is provided with a retaining groove 103. The fixing member 130 also includes a connecting body 133 that is bent and connected to the body 131, and the connecting body 133 is fixedly provided with a retaining protrusion 132. The retaining protrusion 132 is fixed to the body 131 through the connecting body 133, and the body 131 presses part of the flexible circuit board 121 into the first groove 104. Thus, the protrusion 132 is fixed to the body 131 by the connector 133, and the body 131 and the first groove 104 are tightly fitted by the connector 133 and the second groove 105 and the slot 103 and the protrusion 132, and are not affected by the fit between the protrusion 132 and the slot 103, so that the flexible circuit board 121 is subjected to uniform force.

[0068] Furthermore, such as Figure 4 As shown, in some embodiments, the inner wall of the second groove 105 includes a second pressure-bearing surface 1051 spaced apart from the first pressure-bearing surface 102 and a limiting surface 1052 spaced apart from the second pressure-bearing surface 1051 to form a slot 103. There are two limiting surfaces 1052, spaced apart on both sides of the second pressure-bearing surface 1051 to form two slots 103. The connecting body 133 is in contact with the second pressure-bearing surface 1051, and the locking protrusion 132 is an elastic protrusion bent and connected to the connecting body 133. There are two elastic protrusions, spaced apart on both sides of the connecting body 133. Thus, during the process of installing the fastener 130 onto the middle frame 110, pressing the fastener 130 causes the elastic protrusion to be squeezed and deformed against the side wall of the second groove 105. When it reaches the position of the slot 103, the elastic protrusion resets and enters the slot 103, and cooperates with the limiting surface 1052 to achieve the snap-fit ​​engagement between the protrusion 132 and the slot 103. The operation is simple and the assembly is convenient.

[0069] In addition, the fastener 130 can be formed by stamping sheet metal to form the body 131, the connector 133 and the elastic protrusion, which is easy to manufacture and helps to reduce the manufacturing cost of the fastener 130.

[0070] Optionally, such as Figure 5 as well as Figure 6 As shown, in some embodiments, the connector 133 is provided with a second clearance hole 1302. Thus, the second clearance hole 1302 facilitates the fixing of other functional components (such as a folding mechanism) to the middle frame 110 using fasteners. Simultaneously, the fastener 130 can be further secured, ensuring it is firmly fixed to the middle frame 110.

[0071] Understandably, the tight fit between the body 131 and the first groove 104 facilitates the installation of sealing structures such as sealant between the body 131 and the first groove 104, preventing dust or liquid entering through the opening 101 from entering the flexible circuit board 121 and causing a short circuit. Figure 3 , Figure 6 as well as Figure 7 As shown, in some embodiments, the outer wall of the body 131 is provided with a sealing layer 140, which is sealed to the first groove 104 to form a protective space that is not connected to the opening 101. A portion of the flexible circuit board 121 is sealed within the protective space 1111. Thus, since a portion of the flexible circuit board 121 is disposed within the receiving cavity 111, protection is facilitated. The sealing layer 140 and the first groove 104 form the protective space 1111, allowing the flexible circuit board 121 disposed on the first pressure-bearing surface 102 to be waterproofed and dustproofed, improving the sealing performance of the flexible circuit board 121.

[0072] By combining the aforementioned light-transmitting cover and back cover, the flexible circuit board 121 can be reliably sealed inside the terminal device 10, thereby improving the waterproof rating of the terminal device 10.

[0073] Optionally, such as Figure 5 as well as Figure 6 As shown, in some embodiments, the sealing layer 140 is provided to enclose the body 131. In this way, by enclosing the body 131 with the sealing layer 140, the two are tightly connected, which helps to improve the sealing performance of the protective space 1111.

[0074] In addition, secondary injection molding technology can be used to achieve the integral molding of the sealing layer 140 and the body 131, reducing assembly steps.

[0075] Optionally, such as Figure 3As shown, in some embodiments, the first groove 104 includes a first inner sidewall 1041 and a second inner sidewall 1042 disposed opposite each other along its width direction. In the cross-section of the receiving cavity 111 in the width direction, a sealing layer 140 covers the first pressure-bearing surface 102, and the sealing layer 140 is press-fitted with the first inner sidewall 1041 and the second inner sidewall 1042. Thus, the sealing layer 140 can cover the first pressure-bearing surface 102 and press-fit with the first inner sidewall 1041 and the second inner sidewall 1042, reliably sealing the first groove 104.

[0076] Optionally, such as Figure 3 As shown, in some embodiments, at least one of the first inner sidewall 1041 and the second inner sidewall 1042 is provided with an annular groove 1043, and a portion of the sealing layer 140 is embedded in the annular groove 1043. In this way, by using the annular groove 1043 to seal with the sealing layer 140, the contact area between the sealing layer 140 and the inner sidewall of the first groove 104 can be further increased, thereby further improving the sealing performance.

[0077] Optionally, such as Figure 3 As shown, in some embodiments, the sealing layer 140 includes at least one annular protrusion 141, which is press-fitted with the inner wall of the first groove 104. Thus, by utilizing the press-fitting of the annular protrusion 141 with the inner wall of the first groove 104, the pressing force between the sealing layer 140 and the inner wall of the first groove 104 can be further increased, thereby further improving the sealing performance.

[0078] In other embodiments, the sealing layer 140 is not limited to being disposed on the body 131. For example, see reference to Figure 3 As shown, in some embodiments, at least one of the fastener 130 and the middle frame 110 is provided with a sealing layer 140. The sealing layer 140 is at least partially disposed within the receiving cavity 111 to form a protective space 1111 that is not in communication with the opening 101. A portion of the flexible circuit board 121 is sealed within the protective space 1111. Thus, since a portion of the flexible circuit board 121 is disposed within the receiving cavity 111, protection is facilitated. Furthermore, by providing a sealing layer 140 on the fastener 130 and / or the middle frame 110 to form a protective space 1111 that is not in communication with the opening 101, dust or liquid entering from the opening 101 can be prevented from entering the protective space 1111, causing a short circuit or damage to the flexible circuit board 121, thereby improving the sealing performance of the flexible circuit board 121.

[0079] Optionally, refer to Figure 3 As shown, in some embodiments, the sealing layer 140 is disposed on at least a portion of the outer sidewall of the fastener 130. Thus, using the fastener 130 to provide the sealing layer 140 is easy to implement and simple to manufacture.

[0080] Reference Figure 3As shown, in some embodiments, the receiving cavity 111 includes a first inner sidewall 1041 and a second inner sidewall 1042 disposed opposite to each other along its width direction. In the cross-section of the receiving cavity 111 in the width direction, a sealing layer 140 covers the first pressure-bearing surface 102, and the sealing layer 140 is press-fitted with the first inner sidewall 1041 and the second inner sidewall 1042. Thus, the sealing layer 140 can cover the first pressure-bearing surface 102 and press-fit with the first inner sidewall 1041 and the second inner sidewall 1042, reliably sealing the receiving cavity 111.

[0081] Reference Figure 3 As shown, in some embodiments, at least one of the first inner sidewall 1041 and the second inner sidewall 1042 is provided with an annular groove 1043, and a portion of the sealing layer 140 is embedded in the annular groove 1043. In this way, by using the annular groove 1043 to seal with the sealing layer 140, the contact area between the sealing layer 140 and the inner sidewall of the first groove 104 can be further increased, thereby further improving the sealing performance.

[0082] Reference Figure 3 As shown, in some embodiments, the electrical connector 122 includes an electrical connection portion 1201 protruding from the flexible circuit board 121, and the fixing member 130 is provided with a first clearance hole 1301 to avoid the electrical connection portion 1201. The sealing layer 140 is sealed to the flexible circuit board 121 so that the first clearance hole 1301 is not connected to the protective space 1111. In this way, by providing the first clearance hole 1301, the electrical connection portion 1201 can be electrically connected to other electronic devices (such as the flexible display screen 300) through the first clearance hole 1301 without interfering with the connection function of the electrical connector 122, and the flexible circuit board 121 can be securely fixed. At the same time, by using the sealing layer 140 to seal to the flexible circuit board 121, dust or liquid can be prevented from entering the protective space 1111 through the first clearance hole 1301, causing short circuit or damage to the flexible circuit board 121, thus improving the sealing performance of the flexible circuit board 121.

[0083] Reference Figure 3 As shown, in some embodiments, the sealing layer 140 includes at least one annular protrusion 141, which is press-fitted with the sidewall of the receiving cavity 111. Thus, by utilizing the press-fitting of the annular protrusion 141 with the inner sidewall of the receiving cavity 111, the pressing force between the sealing layer 140 and the inner sidewall of the receiving cavity 111 can be further increased, thereby further improving the sealing performance.

[0084] Reference Figure 3As shown, an annular groove 1043 is provided between the sealing layer 140 and the sidewall of the receiving cavity 111, and an annular protrusion 141 is provided between the sealing layer 140 and the sidewall of the receiving cavity 111 to seal with the annular groove 1043. In this way, by using the annular protrusion 141 to seal with the inner sidewall of the annular groove 1043, the contact area between the sealing layer 140 and the inner sidewall of the receiving cavity 111 can be further increased and the compression deformation can be reduced, thereby further improving the sealing performance.

[0085] Reference Figure 3 As shown, in some embodiments, the sealing layer 140 covers at least a portion of the fastener 130. Thus, by covering the fastener 130 with the sealing layer 140, the two are tightly connected, which helps to improve the sealing performance of the protective space 1111.

[0086] In addition, secondary injection molding technology can be used to achieve the integral molding of the sealing layer 140 and the fastener 130, reducing assembly steps.

[0087] Based on any embodiment of the sealing layer 140 described above, referring to Figure 3 as well as Figure 6 As shown, in some embodiments, a first adhesive layer 150 is provided between the sealing layer 140 and the flexible circuit board 121. The sealing layer 140 is bonded and fixed to the flexible circuit board 121 through the first adhesive layer 150, so that part of the flexible circuit board 121 is sealed in the protective space 1111.

[0088] It should be noted that the first adhesive layer 150 can be implemented in various ways, including but not limited to double-sided tape, silicone, and adhesive backing.

[0089] In conjunction with the aforementioned embodiments of the first clearance hole 1301, in some embodiments, the first adhesive layer 150 is silicone. The adhesive and waterproof properties of silicone further improve the sealing performance, ensuring that the first clearance hole 1301 is not connected to the protective space 1111.

[0090] It should be noted that the sealing layer 140 can be made of various materials, as long as it can achieve a sealing effect. For example, sealing rubber, sealing silicone, etc.

[0091] like Figure 3 as well as Figure 7 As shown, in some embodiments, the circuit board assembly 120 further includes a support plate 123, which is fixedly connected to the flexible circuit board 121 and is disposed on the first pressure-bearing surface 102. Thus, the support plate 123 increases the strength of the flexible circuit board 121, preventing it from easily deforming on the middle frame 110 and ensuring a more secure fixation.

[0092] It should be noted that the support plate 123 can be fixedly connected to the flexible circuit board 121 by various means, including but not limited to adhesive fixing, welding fixing, etc.

[0093] In some embodiments, in conjunction with the aforementioned electrical connection embodiments, the flexible circuit board 121 is welded and fixed to the support plate 123, and the electrical connector 122 is welded and fixed to the flexible circuit board 121. Thus, by using the support plate 123 to weld and fix the flexible circuit board 121, and then welding the electrical connector 122 to the flexible circuit board 121, support can be provided, making the welding more secure and ensuring a reliable electrical connection between the electrical connector 122 and the flexible circuit board 121.

[0094] In any embodiment of the support plate 123 described above, such as Figure 3 as well as Figure 7 As shown, in some embodiments, a second adhesive layer 124 is provided between the support plate 123 and the first pressure-bearing surface 102, and the support plate 123 is bonded and fixed to the first pressure-bearing surface 102 through the second adhesive layer 124. In this way, the support plate 123 is fixed to the first pressure-bearing surface 102 through the second adhesive layer 124, achieving partial bonding of the flexible circuit board 121 to the first pressure-bearing surface 102. The support plate 123 has good strength, which helps maintain the reliability of the bonding. Simultaneously, the use of the fastener 130 for fixing ensures that the flexible circuit board 121 is securely fixed to the middle frame 110. Furthermore, since the support plate 123 and the second adhesive layer 124 are also disposed within the receiving cavity 111, the thickness space of the middle frame 110 is fully utilized, thus not affecting the lightweight manufacturing of the terminal device 10.

[0095] It should be noted that there are various ways to implement the second adhesive layer 124, including but not limited to double-sided tape, silicone, and adhesive backing.

[0096] It should be noted that the material of the support plate 123 includes metal materials. For example, aluminum alloy support plate 123, support steel plate, etc.

[0097] It should be noted that the fastener 130 can be made of various materials, including but not limited to metals, such as aluminum alloy or steel.

[0098] Reference Figure 8 As shown, in some embodiments, the terminal device 10 may further include one or more of the following components: processing component 11, memory 12, power supply component 13, multimedia component 14, audio component 15, input / output interface 16, sensor component 17, and communication component 18.

[0099] The processing component typically controls the overall operation of the terminal device, such as operations associated with display, telephone calls, data communication, camera operation, and recording. The processing component may include one or more processors 1020 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, the processing component may include one or more modules to facilitate interaction between the processing component and other components. For example, the processing component may include a multimedia module to facilitate interaction between multimedia components and the processing component, such as a control motherboard.

[0100] Memory is configured to store various types of data to support operation on a terminal device. Examples of this data include instructions for any application or method operating on the terminal device, contact data, phonebook data, messages, pictures, videos, etc. Memory can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0101] Power supply components provide power to various components of a terminal device. Power supply components may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the terminal device.

[0102] The multimedia component includes the flexible display screen of this disclosure, facilitating human-computer interaction. If the flexible display screen includes a touch panel, it can be implemented as a touchscreen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component includes a front-facing camera and / or a rear-facing camera. When the terminal device is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or rear-facing camera can receive external multimedia data. Each front-facing camera and rear-facing camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

[0103] The audio component is configured to output and / or input audio signals. For example, the audio component includes a microphone (MIC) configured to receive external audio signals when the terminal device is in an operating mode, such as call mode, recording mode, or voice recognition mode. The received audio signals may be further stored in memory or transmitted via a communication component. In some embodiments, the audio component also includes a speaker for outputting audio signals.

[0104] The input / output interface provides an interface between the processing component and the peripheral interface module, which can be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.

[0105] The sensor assembly includes one or more sensors for providing status assessments of various aspects of the terminal device. For example, the sensor assembly can detect the on / off state of the terminal device, the relative positioning of components such as the terminal device's display and keypad, changes in the position of the terminal device or a component of the terminal device, the presence or absence of user contact with the terminal device, the terminal device's orientation or acceleration / deceleration, and temperature changes. The sensor assembly may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0106] The communication component is configured to facilitate wired or wireless communication between the terminal device and other devices. The terminal device can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, the communication component receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra-Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0107] It should be noted that the "second adhesive layer" can be one of the parts of the "circuit board assembly" module, that is, it can be assembled with the "other components of the circuit board assembly" into a module and then modularly assembled; or it can be relatively independent from the "other components of the circuit board assembly" and can be installed separately, that is, it can form a whole with the "other components of the circuit board assembly" in this component.

[0108] Similarly, the components included in the "components," "parts," and "equipment" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0109] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0110] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0111] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0112] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0113] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component.

[0114] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0115] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A mid-frame component, characterized in that, include: The middle frame has a receiving cavity and a through hole penetrating the side wall of the receiving cavity. The receiving cavity has an opening and a first pressure-bearing surface disposed opposite to the opening. The receiving cavity includes a first groove. A circuit board assembly includes a flexible circuit board, a portion of which is adhered to the first pressure-bearing surface, and a portion of which passes through the through hole and is disposed outside the middle frame; as well as A fastener is fixedly connected to the middle frame. The fastener includes a body that presses a portion of the flexible circuit board into the first groove. The circuit board assembly further includes an electrical connector disposed on the flexible circuit board, the electrical connector being disposed toward the opening, and at least a portion of the electrical connector being received through the receiving cavity.

2. The middle frame component according to claim 1, characterized in that, The fastener is connected to the middle frame by a snap fastener.

3. The middle frame component according to claim 1, characterized in that, The fastener also includes a latching protrusion fixed to the body, and the middle frame is provided with a latching groove communicating with the receiving cavity. The latching protrusion and the latching groove are fastened together so that the body presses part of the flexible circuit board onto the middle frame.

4. The middle frame component according to claim 3, characterized in that, There are at least three card protrusions, which are spaced apart on the body; the card slots correspond one-to-one with the card protrusions.

5. The middle frame component according to claim 3, characterized in that, The electrical connector includes an electrical connection portion protruding from the flexible circuit board, and the body is provided with a first clearance hole to avoid the electrical connection portion.

6. The middle frame component according to any one of claims 3 to 5, characterized in that, The receiving cavity further includes a second groove communicating with the first groove. The bottom surface of the first groove is provided with the first pressure-bearing surface. The through hole is provided through the inner sidewall of the first groove. The second groove is provided away from the first pressure-bearing surface. The second groove is provided with the opening, and the sidewall of the second groove is provided with the locking groove. The fixing member further includes a connector that is bent and connected to the body. The connector is fixed with the locking protrusion. The locking protrusion is fixed to the body through the connector.

7. The middle frame component according to claim 6, characterized in that, The inner wall of the second groove includes a second pressure-bearing surface spaced apart from the first pressure-bearing surface and a limiting surface spaced apart from the second pressure-bearing surface to form the slot. There are two limiting surfaces, which are spaced apart on both sides of the second pressure-bearing surface to form two slots. The connecting body is in contact with the second pressure-bearing surface. The locking protrusion is an elastic protrusion that is bent and connected to the connecting body. There are two elastic protrusions, which are spaced apart on both sides of the connecting body.

8. The middle frame component according to claim 6, characterized in that, The outer wall of the main body is provided with a sealing layer, which is sealed in conjunction with the first groove to form a protective space that is not connected to the opening, and part of the flexible circuit board is sealed within the protective space.

9. The middle frame component according to claim 8, characterized in that, The sealing layer is provided to enclose the body.

10. The middle frame component according to claim 8, characterized in that, The first groove includes a first inner sidewall and a second inner sidewall disposed opposite to each other along its width direction. In the cross-section of the receiving cavity in the width direction, the sealing layer covers the first pressure-bearing surface and the sealing layer is press-fitted with the first inner sidewall and the second inner sidewall.

11. The middle frame component according to claim 10, characterized in that, At least one of the first inner sidewall and the second inner sidewall is provided with an annular groove, and a portion of the sealing layer is embedded in the annular groove.

12. The middle frame component according to claim 10, characterized in that, The sealing layer includes at least one annular protrusion that is press-fitted with the inner wall of the first groove.

13. The middle frame component according to claim 1, characterized in that, At least one of the fastener and the middle frame is provided with a sealing layer, and the sealing layer is at least partially disposed in the receiving cavity to form a protective space that is not connected to the opening, and a portion of the flexible circuit board is sealed within the protective space.

14. The middle frame component according to claim 13, characterized in that, The sealing layer is disposed on at least a portion of the outer side wall of the fastener.

15. The middle frame component according to claim 14, characterized in that, The receiving cavity includes a first inner sidewall and a second inner sidewall disposed opposite to each other along its width direction. In the cross-section of the receiving cavity in the width direction, the sealing layer is disposed covering the first pressure-bearing surface, and the sealing layer is press-fitted with the first inner sidewall and the second inner sidewall.

16. The middle frame component according to claim 15, characterized in that, At least one of the first inner sidewall and the second inner sidewall is provided with an annular groove, and a portion of the sealing layer is embedded in the annular groove.

17. The middle frame component according to claim 13, characterized in that, The circuit board assembly further includes an electrical connector disposed on the flexible circuit board, the electrical connector being disposed toward the opening, the electrical connector including an electrical connection portion protruding from the flexible circuit board, the fixing member having a first clearance hole that avoids the electrical connection portion, and the sealing layer sealingly engaging with the flexible circuit board so that the first clearance hole is not connected to the protective space.

18. The middle frame component according to claim 13, characterized in that, The sealing layer includes at least one annular protrusion that is press-fitted with the sidewall of the receiving cavity; or, the sealing layer and the sidewall of the receiving cavity are provided with an annular groove on one side and an annular protrusion that is sealed with the annular groove on the other side.

19. The middle frame component according to any one of claims 13 to 18, characterized in that, The sealing layer covers at least a portion of the fastener; and / or, a first adhesive layer is provided between the sealing layer and the flexible circuit board, and the sealing layer is bonded and fixed to the flexible circuit board through the first adhesive layer, so that a portion of the flexible circuit board is sealed within the protective space.

20. The middle frame component according to claim 1, characterized in that, The circuit board assembly also includes a support plate, which is fixedly connected to the flexible circuit board and is disposed on the first pressure-bearing surface.

21. The middle frame component according to claim 20, characterized in that, The flexible circuit board is welded and fixed to the support plate, and the electrical connector is welded and fixed to the flexible circuit board; and / or, a second adhesive layer is provided between the support plate and the first pressure-bearing surface, and the support plate is bonded and fixed to the first pressure-bearing surface through the second adhesive layer.

22. A terminal device, characterized in that, Includes the middle frame component as described in any one of claims 1 to 21.

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