A functional assembly and an electronic device

Abstract

This application provides a functional component and an electronic device. The functional component includes a fingerprint module, a push-button switch, and a flexible circuit board. The fingerprint module generates fingerprint signals, and the push-button switch generates switch signals. The flexible circuit board includes a first segment and a second segment connected in sequence. The first segment is electrically connected to the fingerprint module, and the second segment is electrically connected to the push-button switch. The flexible circuit board is used to transmit the fingerprint signal and the switch signal. The flexible circuit board is an integrated flexible circuit board, which enables signal transmission between the fingerprint module, the push-button switch, and other components of the electronic device using a single flexible circuit board, achieving higher integration. Furthermore, the use of this integrated flexible circuit board avoids the need for clearance grooves in the frame of the electronic device to accommodate the flexible circuit board, thereby improving the sealing and waterproofing performance of the electronic device.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a functional component and electronic device having a flexible circuit board structure that is electrically connected to both a fingerprint module and a push-button switch. Background Technology

[0002] Users of mobile phones, tablets, and other products are demanding increasingly higher reliability, especially as the waterproof ratings of electronic products are gradually improving, which in turn raises the requirements for the waterproof sealing design of electronic devices. For electronic devices with side-mounted fingerprint modules, the placement of the side-mounted fingerprint module often compromises the overall sealing and protection of the device, leading to a decrease in protective effectiveness.

[0003] Therefore, a new electronic device structure needs to be designed to improve the overall sealing and protection effect. Summary of the Invention

[0004] This application provides a functional component and an electronic device that improves the integration of the functional component and the sealing and waterproofing effect of the electronic device.

[0005] In a first aspect, this application provides a functional component applied to an electronic device, and the functional component includes: a fingerprint module, a push-button switch, and a flexible circuit board. The fingerprint module is used to generate a fingerprint signal, and the push-button switch is used to generate a switch signal. The flexible circuit board includes a first segment and a second segment connected in sequence. The first segment is electrically connected to the fingerprint module, and the second segment is electrically connected to the push-button switch. The flexible circuit board is used to transmit the fingerprint signal and the switch signal.

[0006] The flexible circuit board of this application is an integrated flexible circuit board. Using a single flexible circuit board, signal transmission between the fingerprint module, key switches, and other components of the electronic device can be achieved. This allows for higher integration, easier assembly, and saves one flexible circuit board, thereby reducing production costs. For example, the flexible circuit board in this application can be an attached... Figure 10 The third flexible circuit board 40 shown in this application may include a push-button switch. Figure 11 The third push-button switch 823.

[0007] In one embodiment, the functional component further includes a reinforcing member, which is a conductor, and the reinforcing member and the push-button switch are respectively disposed on opposite sides of the flexible circuit board; wherein the reinforcing member is electrically connected to the flexible circuit board.

[0008] In one embodiment, the flexible circuit board has a copper leakage area on the side surface facing the reinforcement, and within the copper leakage area, the insulating layer of the flexible circuit board is removed; the copper leakage area is electrically connected to the reinforcement.

[0009] By incorporating conductor reinforcement and a copper drain area on the flexible circuit board, with electrical connection between the copper drain area and the conductor reinforcement, the flexible circuit board and the metal frame can be electrically connected when the conductor reinforcement is fixed to the metal frame of the electronic device, thus achieving grounding of the flexible circuit board. Compared to related technologies that require an additional grounding area to ground the flexible circuit board, this embodiment utilizes the existing flexible circuit board and reinforcement structure, eliminating the need for an additional grounding area and simplifying the design of the flexible circuit board. Furthermore, due to the larger area of ​​the reinforcement, the area of ​​the copper drain area can be set larger, resulting in a larger grounding area and higher grounding reliability.

[0010] In some embodiments, the copper leakage area can be a continuous or discontinuous structure.

[0011] In some embodiments, the flexible circuit board is provided with a fingerprint signal transmission line for transmitting fingerprint signals and a switch signal transmission line for transmitting switch signals; wherein, the fingerprint signal transmission line is set from the position corresponding to the fingerprint module and extends in a direction away from the fingerprint module, and the switch signal transmission line is set from the position corresponding to the button switch and extends in a direction away from the button switch.

[0012] In some embodiments, the functional component further includes a connector, an end of the second segment remote from the first segment, for electrical connection to the main circuit board of the electronic device.

[0013] In some embodiments, the button switch is one of the following: power button switch, volume button switch, and camera button switch.

[0014] Secondly, this application provides an electronic device, which includes: a mid-frame, a display module, a main circuit board, and functional components. The mid-frame includes a first surface and a second surface opposite to each other. The display module is disposed on the first surface, and the main circuit board is disposed on the second surface. The functional components include: a fingerprint module, a push-button switch, and a flexible circuit board. The fingerprint module is used to generate fingerprint signals, and the push-button switch is used to generate switch signals. The flexible circuit board includes a first segment and a second segment connected in sequence. The first segment is electrically connected to the fingerprint module, and the second segment is electrically connected to the push-button switch. The flexible circuit board is used to transmit the fingerprint signals and the switch signals to the main circuit board.

[0015] In some embodiments, the functional component further includes a reinforcing member, which is a conductor, and the reinforcing member and the push-button switch are respectively disposed on opposite sides of the flexible circuit board; wherein the reinforcing member is electrically connected to the flexible circuit board.

[0016] In some embodiments, the flexible circuit board has a copper leakage area on the side surface facing the reinforcement, and within the range of the copper leakage area, the insulating layer of the flexible circuit board is removed; the copper leakage area is electrically connected to the reinforcement.

[0017] In some embodiments, the copper leakage area can be a continuous or discontinuous structure.

[0018] In some embodiments, the flexible circuit board is provided with a fingerprint signal transmission line for transmitting fingerprint signals and a switch signal transmission line for transmitting switch signals; wherein, the fingerprint signal transmission line is set from the position corresponding to the fingerprint module and extends in a direction away from the fingerprint module, and the switch signal transmission line is set from the position corresponding to the button switch and extends in a direction away from the button switch.

[0019] In some embodiments, the functional component further includes a connector, with the second end of the segment remote from the first segment electrically connected to the connector, the connector being electrically connected to the main circuit board of the electronic device.

[0020] In some embodiments, the button switch is one of the following: power button switch, volume button switch, and camera button switch.

[0021] In some embodiments, the mid-frame includes a front shell and a rear shell. The front shell includes a mid-plate and a front shell frame. The front shell frame is disposed around the periphery of the mid-plate, and the rear shell is disposed around the periphery of the front shell frame. The front shell frame includes a first sub-frame and a second sub-frame distributed along the width direction of the electronic device. The first sub-frame includes an outward first side and a second side disposed opposite to the first side. A reinforcing member is fixedly disposed on the first side and electrically connected to the first side.

[0022] In some embodiments, the first segment of the flexible circuit board includes a first sub-segment, a second sub-segment, a third sub-segment, and a fourth sub-segment; the second segment of the flexible circuit board includes a fifth sub-segment and a sixth sub-segment; the first sub-segment is electrically connected to the fingerprint module, and one end of the first sub-segment is connected to the first end of the second sub-segment; the second sub-segment extends along the length direction of the first sub-segment, and the second end of the second sub-segment is connected to the first end of the third sub-segment; the third sub-segment is an arc-shaped segment, and the second end of the third sub-segment is connected to the first end of the fourth sub-segment; the fourth sub-segment extends in the opposite direction to the extension direction of the second sub-segment, and the second end of the fourth sub-segment is connected to the first end of the fifth sub-segment; the fifth sub-segment is correspondingly provided with a push-button switch, and the second end of the fifth sub-segment is connected to the first end of the sixth sub-segment; the extension direction of the sixth sub-segment forms a certain angle with the extension direction of the fifth sub-segment, and the second end of the sixth sub-segment is electrically connected to a connector.

[0023] In some embodiments, the first sub-segment, the second sub-segment, the third sub-segment, the fourth sub-segment, and the fifth sub-segment are all disposed on the side of the first side facing outward.

[0024] In this application's electronic device, the main body of the flexible circuit board is located on the side facing outwards from the first side, eliminating the need for the flexible circuit board to connect to the main circuit board via the second part of the first sub-frame. Therefore, the second part of the first sub-frame does not require a clearance notch to avoid the flexible circuit board, preventing external liquids from entering the battery compartment area through the clearance notch. Compared to related technologies, this embodiment improves the waterproof performance of the electronic device. Furthermore, eliminating the clearance notch allows for a smoother first surface of the first sub-frame facing the back cover, thereby increasing the adhesion strength between the first surface and the back cover.

[0025] In some embodiments, the first sub-frame includes a first part and a second part, the first part being opposite to the main circuit board and the second part being opposite to the battery of the electronic device; a through hole penetrating the thickness of the first sub-frame is provided on the second part of the first sub-frame, and a sixth sub-segment is configured to pass through the through hole and be electrically connected to the connector.

[0026] In some embodiments, the connector is a board-to-board connector, and at least a portion of the connector is provided with sealing material around its perimeter.

[0027] In some embodiments, a sealing material is provided inside the through hole.

[0028] In particular, by providing sealing material at least partially around the connector and / or within the through-hole, the sealing level of the electronic device can be further improved, reducing the entry of liquid from the outside into the electronic device. Attached Figure Description

[0029] Figure 1 A three-dimensional schematic diagram of electronic device 100 from different perspectives;

[0030] Figure 2 This is an exploded view of electronic device 100;

[0031] Figure 3 This is a schematic diagram of the structure of functional component 30 in the related technology;

[0032] Figure 4 for Figure 3 An exploded view of the functional component 30 shown from another perspective;

[0033] Figure 5 for Figure 3 A schematic diagram showing the structure of functional component 30 connected to the main circuit board;

[0034] Figure 6 for Figure 3 A magnified view of the local region Z1 in the image;

[0035] Figure 7 for Figure 3 Working principle diagram of functional component 30 in the middle;

[0036] Figure 8 for Figure 3 The diagram shows the fingerprint recognition device 60 and button assembly 80 assembled onto the front shell 201 of the electronic device 100.

[0037] Figure 9 for Figure 8 An enlarged view of a local region Z2 of the electronic device 100 shown;

[0038] Figure 10 This is a schematic diagram of the structure of functional component 30 in the embodiments of this application;

[0039] Figure 11 This is a schematic diagram of the structure of the third flexible circuit board 40 in the embodiments of this application;

[0040] Figure 12 This is a schematic diagram of the working principle of functional component 30 in the embodiments of this application;

[0041] Figure 13 This is an exploded view of the functional component 30 in the embodiments of this application from a first-view perspective;

[0042] Figure 14 This is an exploded view of the functional component 30 in the embodiments of this application from a second perspective;

[0043] Figure 15 This is a schematic diagram of the structure of the functional component 30 after it is assembled into the front shell 201 of the electronic device 100 in an embodiment of this application.

[0044] Figure 16 for Figure 15 A magnified view of the local region Z3 in the image;

[0045] Figure 17 for Figure 15 A magnified view of the local region Z4 in the image;

[0046] Figure 18 for Figure 15 A magnified view of a local area from another perspective. Detailed Implementation

[0047] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0048] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0049] In the description of the embodiments of this application, the term "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.

[0050] In the description of the embodiments of this application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0052] The directional terms mentioned in the embodiments of this application, such as "inner" and "outer", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to 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.

[0053] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0054] As used herein, “parallel,” “perpendicular,” “equal,” and “coincident” include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°. “Equal” includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals less than or equal to 5% of either one. “Coincident” includes absolute coincidence and approximate coincidence, where the acceptable deviation range for approximate coincidence can be, for example, a distance between the two less than or equal to 0.5 mm.

[0055] This application provides an electronic device, which is a type of electronic device with a photosensitive element. Specifically, the electronic device can be a portable electronic device or other suitable electronic device. For example, the electronic device can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device (such as a watch or wristband), augmented reality (AR) glasses, AR helmet, virtual reality (VR) glasses, or VR helmet, etc.

[0056] In this application, the electronic device 100 is taken as a mobile phone. Figure 1 The diagram shows the structure of the electronic device 100 from different perspectives. Figure 1 (a) in the figure is a stereoscopic view of the electronic device 100 from a first-view perspective, such as a stereoscopic view obtained from one side of the screen of the electronic device 100. Figure 1 (b) is a three-dimensional schematic diagram of the electronic device 100 from a second perspective, such as a three-dimensional schematic diagram obtained by viewing the electronic device 100 from the back (battery cover) side.

[0057] like Figure 1 As shown in Figures a and 1b, the electronic device 100 may include a display module 10, a middle frame 20, and a back shell 90. The display module 10, the middle frame 20, and the back shell 90 are stacked sequentially. For ease of description in the following embodiments, an XYZ coordinate system is established for the electronic device 100. Specifically, the thickness direction of the electronic device 100, i.e., the direction in which the display module 10, the middle frame 20, and the back shell 90 are stacked, is defined as the Z-axis direction. The directions perpendicular to the Z-axis direction are the X-axis direction and the Y-axis direction, respectively, and the X-axis direction and the Y-axis direction are perpendicular. Specifically, in this embodiment, the electronic device 100 is rectangular flat, wherein the length direction of the electronic device 100 is the Y-axis direction, and the width direction of the electronic device 100 is the X-axis direction. It is understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and is not specifically limited here.

[0058] The overall architecture of the electronic device 100 can be either a unibody structure or a sandwich architecture. In a unibody architecture, the middle frame 20 of the electronic device 100 is a separate structure; in a sandwich architecture, the middle frame 20 is a single piece. This application's embodiments all use the unibody architecture electronic device 100 as an example for description.

[0059] Figure 2 An exploded view of electronic device 100 is shown, such as... Figure 2 As shown, the display module 10, the middle frame 20, and the back shell 90 of the electronic device 100 are stacked sequentially. The middle frame 20 includes a front shell 201 and a rear shell 202. The front shell 201 includes a middle plate 2011 and a front shell frame 2012, and the rear shell 202 includes a fixing bracket 2021 and a rear shell frame 2022. The middle plate 2011 is rectangular and flat. The front shell frame 2012 surrounds the middle plate 2011 and forms a cavity on one side of the middle plate 2011 for accommodating devices. For example, from the top to the bottom of the electronic device 100, i.e., in the negative Y-axis direction, a first cavity 203 for accommodating the main circuit board 511, a second cavity 204 (i.e., battery compartment) for accommodating the battery 70, and a third cavity 205 for accommodating the sub-circuit board 512 are formed. The main circuit board 511, the battery 70, and the sub-circuit board 512 of the electronic device 100 can all be fixed to the middle plate 2011 by being disposed in the cavities.

[0060] The rear shell 202 can be detachably fixed to the front shell 201 using snap-fit ​​or insert-in methods. After the rear shell 202 and the front shell 201 are assembled together to form the mid-frame 20, the rear shell frame 2022 is arranged around the outer surface of the front shell frame 2012. Part of the outer surface of the front shell frame 2012 is covered by the rear shell 202 and is not visible to the user during the use of the electronic device 100. The uncovered outer surface of the front shell frame 2012 and the outer surface of the rear shell frame 2022 together form the appearance surface of the mid-frame 20 that the user can observe, as well as the part that the user can hold.

[0061] The fixing brackets 2021 of the rear shell 202 are provided on both sides of the rear shell 202 in the Y direction and are connected to the rear shell frame 2022. When the rear shell 202 is fastened to the front shell 201, the fixing brackets 2021 can be used to fix the main circuit board 511 and / or the sub-circuit board 512.

[0062] The display module 10 and the back cover 90 are stacked on top of the middle frame 20 in the Z-axis direction, and the display module 10 is fixed to the front cover frame 2012. Specifically, the display module 10 is fixedly disposed on the side of the front cover frame 2012 away from the second cavity 204. The display module 10 is used to display image information, video information, etc. The back cover 90 is fixedly disposed on the side of the middle frame 20 away from the display module 10. Specifically, the back cover 90 is fixedly disposed on the side of the rear cover frame 2022 away from the display module 10. The back cover 90 can be fixedly connected to the rear cover frame 2022 by means of adhesive, welding, or snap-fit. The surface of the back cover 90 away from the display module 10 forms the appearance surface of the electronic device 100. The back cover 90 is flat. The material of the back cover 90 includes, but is not limited to, glass, plastic, metal, and ceramic.

[0063] The electronic device 100 may also be provided with a functional component 30, which includes a fingerprint recognition device 60 and a button component 80. The fingerprint recognition device 60 is used to implement fingerprint recognition function, and the button component 80 is used to implement button-related functions of the electronic device 100, such as powering on, powering off, and controlling the volume of the electronic device 100.

[0064] Understandable, Figures 1-2 The electronic device 100 is shown only schematically, and the actual shape, size, location, and construction of these components are not subject to change. Figure 1 and Figure 2 Restrictions.

[0065] Figure 3 This is a structural schematic diagram of a functional component 30 in a related technology. Figure 4 for Figure 3 An exploded view of functional component 30 from another perspective. See also... Figures 3-4The functional component 30 includes a fingerprint recognition device 60 and a button component 80.

[0066] The fingerprint recognition device 60 includes a fingerprint module 61, a first flexible circuit board 62, a first reinforcing member 63, an elastic member 64, and a first connector 65. The outer surface of the fingerprint module 61 is exposed to the outside of the electronic device 100, providing a touch area for the user. One end of the first flexible circuit board 62 is connected to the fingerprint module 61, and the other end is connected to the first connector 65. The first flexible circuit board 62 and the first connector 65 are used to electrically connect the fingerprint module 61 and the main circuit board 511 inside the electronic device 100. The first reinforcing member 63 is connected to the surface of the first flexible circuit board 62 away from the fingerprint module 61 and is disposed opposite to the fingerprint module 61. The first reinforcing member 63 can be a stainless steel sheet, used to improve the overall structural strength of the fingerprint module 61. The elastic element 64 is connected to the side surface of the first reinforcing element 63 away from the fingerprint module 61, and is used to fix the fingerprint module 61 to the back cover 202. The elastic element 64 can be made of materials with a certain elasticity such as TPU (Thermoplastic Polyurethane), rubber, and silicone, through an integral injection molding process.

[0067] The button assembly 80 includes a pressing part 81, a button switch assembly 82, a second flexible circuit board 83, a reinforcing assembly 84, and a second connector 85. The outer surface of the pressing part 81 is exposed to the outside of the electronic device 100, providing a pressing area for the user. The button switch assembly 82 is disposed on one side surface of the second flexible circuit board 83 and electrically connected to it. The button switch assembly 82 receives pressure from the pressing part 81 and generates a button signal to realize the corresponding button function. The reinforcing assembly 84 is disposed on the opposite side surface of the second flexible circuit board 83 and fixedly connected to it. The reinforcing assembly 84 is fixedly mounted on the electronic device 100, thereby fixing the second flexible circuit board 83 and the button switch assembly 82 to the electronic device 100 and providing support strength for them. The end of the second flexible circuit board 83 away from the button switch assembly 82 is connected to the second connector 85. The second flexible circuit board 83 and the second connector 85 electrically connect the button switch assembly 82 and the main circuit board 511 of the electronic device 100. The push-button switch assembly 82 includes one or more switches, such as a first push-button switch 821, a second push-button switch 822, and a third push-button switch 823. The reinforcing assembly 84 may include one or more reinforcing members, such as a second reinforcing member 841 and a third reinforcing member 842.

[0068] Figure 5Showing Figure 3 One way in which the first flexible circuit board 62 and the second flexible circuit board 83 of the functional component 30 are connected to the main circuit board 511. Figure 6 for Figure 5 A magnified view of the local region Z1. (See image below.) Figure 5 and Figure 6 As shown, the end of the first flexible circuit board 62 away from the fingerprint module 61 is electrically connected to the first connector 65, which is a BTB (Board To Board) connector. The first connector 65 is fastened to the main circuit board 511 to realize the electrical connection between the first flexible circuit board 62 and the main circuit board 511. The end of the second flexible circuit board 83 away from the button switch assembly 82 and the fingerprint module 61 is electrically connected to the second connector 85. The second connector 85 includes an electrical connection surface 850, on which one or more contacts 851 are provided. The contacts 851 are used to electrically connect with the corresponding springs 511a on the main circuit board 511, thereby realizing the electrical connection between the second flexible circuit board 83 and the main circuit board 511.

[0069] Figure 7 Showing Figure 3 The working principle diagram of the functional component 30 is shown below. Figure 7 As shown, in this related technology, the first flexible circuit board 62 (FPC1) of the fingerprint recognition device 60 and the second flexible circuit board 83 (FPC2) of the button assembly 80 are separate structures. The power line, fingerprint signal transmission line, and ground line (GND) of the fingerprint module 61 are located in the first flexible circuit board 62, and the switch signal transmission line and ground line (GND) of the button assembly 80 are located in the second flexible circuit board 83 (FPC2). The fingerprint signal generated by the fingerprint module 61 in the fingerprint recognition device 60 is transmitted to the main circuit board 511 through the fingerprint signal transmission line in the first flexible circuit board 62, and the switch signal generated by the button switch assembly 82 in the button assembly 80 is transmitted to the main circuit board 511 through the switch signal transmission line in the second flexible circuit board 83. That is, the electrical signal generated by the fingerprint module 61 and the electrical signal generated by the button switch assembly 82 are transmitted to the main circuit board 511 through different flexible circuit boards.

[0070] Figure 8 Showing Figure 3 The diagram shows the fingerprint recognition device 60 and button assembly 80 mounted on the front housing 201 of the electronic device 100. Figure 9 Showing Figure 8 An enlarged view of a local area Z2 of the electronic device 100 shown. (See attached image.) Figure 8 and Figure 9As shown, the front shell frame 2012 includes a first sub-frame 20121 and a second sub-frame 20122 disposed opposite to each other along the width direction (i.e., the X-axis direction) of the electronic device 100; the first sub-frame 20121 includes a first part 20121a, a second part 20121b and a third part 20121c, wherein the first part 20121a corresponds to the location of the main circuit board, i.e., the first cavity 203, the second part 20121b corresponds to the location of the battery compartment, i.e., the second cavity 204, and the third part 20121c corresponds to the location of the sub-circuit board 512, i.e., the third cavity 205.

[0071] See also Figure 8 and Figure 9 The first sub-frame 20121 has a first surface 221 facing the back shell 90 and a second surface 222 opposite to the first surface 221. The first sub-frame 20121 also includes a first side surface 223 and a second side surface 224 disposed opposite to each other along the width direction (i.e., the X-axis direction). The first surface 221 is used for fixed connection with the back shell 202 and the back shell 90; the second surface 222 is used for fixed connection with the display module 10; the first side surface 223 faces outward and connects the first surface 221 and the second surface 222, and the first side surface 223 is recessed towards the second side surface 224 to form a groove 2231, which is used to accommodate part of the structure of the button assembly 80. For example, the button switch assembly 82, the reinforcing assembly 84, and the second flexible circuit board 83 can be disposed within the groove 2231, with the reinforcing assembly 84 fixedly connected to the groove 2231, thereby fixing both the button switch assembly 82 and the second flexible circuit board 83 to the electronic device 100. Furthermore, the first side surface 223 is also provided with a snap-fit ​​and / or insert structure (not shown), which is used to cooperate with a corresponding structure on the inner surface of the rear shell 202. When the rear shell 202 is fastened to the front shell 201, the first side surface 223 is opposite to the inner surface of the rear shell 202. The snap-fit ​​and / or insert structure on the first side surface 223 can improve the assembly firmness between the front shell 201 and the rear shell 202. For example, in order to make it easier for the rear shell frame 2022 to be assembled to the outer periphery of the front shell frame 2012 when the rear shell 202 is fastened to the front shell 201, a portion of the first side surface 223 can be set as a generally arcuate surface, or a portion of the first side surface 223 and the second surface 222 can form a generally arcuate surface as a whole.

[0072] See also Figure 8 and Figure 9The second side 224 is connected to the middle plate 2011, and a portion of the second side 224 forms the inner wall of the second cavity 204 (i.e., the battery compartment) to limit the position of the battery 70. The first surface 221 of the first sub-frame 20121 has a protruding structure 20123 protruding towards the back cover 90. The protruding structure 20123 is disposed on the edge of the first surface 221 near the second cavity 204 (i.e., the battery compartment) and extends in an elongated shape along the Y-axis. At least a portion of the protruding structure 20123 is correspondingly disposed with the second cavity 204. The protruding structure 20123 can be used as a limiting structure when the rear cover 202 is assembled with the front cover 201. When the rear cover 202 is assembled to the front cover 201, the protruding structure 20123 can limit the movement of the rear cover 202 in the width direction of the electronic device 100. See also Figure 8 and Figure 9 In this related technology, after the functional component 30 is assembled onto the front housing, the push-button switch assembly 82, the reinforcing assembly 84, and the second flexible circuit board 83 are disposed within the groove 2231 of the front housing 201. The second flexible circuit board 83 extends along the first side 223 of the first sub-frame 2012. For example, the second flexible circuit board 83 extends along the positive Y-axis and, after passing over the first portion 20121a of the first sub-frame 20121 at an appropriate position, is electrically connected to the main circuit board 511 via the second connector 85. However, to avoid interfering with the pressing of the push-button switch assembly 82 by the pressing part 81, and due to insufficient space in the groove 2231 of the front housing 201, the first flexible circuit board 62 cannot be disposed within the groove of the front housing 201 and extend along the positive Y-axis like the second flexible circuit board 83. Typically, one end of the first flexible circuit board 62 is connected to the fingerprint module 61. The first flexible circuit board 62 then extends along the negative Y-axis, passes over the second portion 20121b of the first sub-frame 20121, and enters the battery compartment area. It is then electrically connected to the main circuit board 511 via the first connector 65. This design allows the main bodies of the first flexible circuit board 62 and the second flexible circuit board 83 to be staggered, thus providing suitable space for both to be accommodated within the electronic device 100.

[0073] To prevent the rear shell 202 and back shell 90 from squeezing the first flexible circuit board 62 during assembly, thereby damaging the first flexible circuit board 62 and the second flexible circuit board 83, the protruding structure 20123 of the first sub-frame 20121 is provided with a first clearance notch 20124 at the position corresponding to the first flexible circuit board 62, and the first sub-frame 20121 is provided with a second clearance notch 20125 at the position corresponding to the second flexible circuit board 83. Specifically, the second part of the first sub-frame 20121 is provided with a clearance notch 20124. The first clearance notch 20124 passes through the protrusion structure 20123 along the width direction of the electronic device 100. The first flexible circuit board 62 passes through the protrusion structure 20123 through the first clearance notch 20124 and enters the battery compartment area. Then it extends along the assembly gap between the battery 70 and the back cover 90 and is electrically connected to the main circuit board 511. The first part of the first sub-frame 20121 is provided with a second clearance notch 20125. The second clearance notch 20125 passes through the first sub-frame 20121 along the width direction of the electronic device 100. The second flexible circuit board 83 passes through the first sub-frame 20121 through the second clearance notch 20125 and enters the main circuit board 511 area. Then it is electrically connected to the main circuit board 511.

[0074] However, the mid-frame 20 of the unibody architecture electronic device 100 includes a front shell 201 and a rear shell 202. The rear shell 202 is fixed to the front shell 201 by means such as clips or inserts, and is also fixed with screws. However, due to assembly and fitting reasons, the front shell 201 and the rear shell 202 cannot fit with zero clearance; there is usually a certain fitting clearance, such as 0.02mm-0.15mm. This results in a large liquid inlet channel between the front shell 201 and the rear shell 202, which is directly connected to the outside. As mentioned earlier, due to… In the related technology, the first sub-frame 20121 is provided with a first clearance notch 20124 to avoid the first flexible circuit board 62 and a second clearance notch 20125 to avoid the second flexible circuit board 83. After external liquid enters the outside of the first sub-frame 20121 through the liquid inlet channel between the front shell 201 and the rear shell 202, it can further enter the battery compartment through the first clearance notch 20124 or enter the area of ​​the main circuit board 511 through the second clearance notch 20125, which results in a high risk of liquid ingress into the electronic device 100 in the related technology.

[0075] To improve the reliability of electronic device 100, a waterproof sealing design is required. Commonly, this is achieved by placing sealing foam at the first clearance notch 20124 and the second clearance notch 20125, and then pressing the first flexible circuit board 62 and the second flexible circuit board 83 together. However, the sealing method using sealing foam has a low waterproof rating and cannot meet the requirements for high-level waterproofing.

[0076] Furthermore, during the use of the electronic device 100, the fingerprint recognition device 60 is prone to generating static electricity. To release the static electricity generated by the fingerprint recognition device 60, a grounding area 225 is specifically provided on the first flexible circuit board 62 in the related technology. The grounding area 225 is electrically connected to the metal area of ​​the front shell 201 to play a role in static electricity discharge. Specifically, the related technology generally places conductive foam between the grounding area 225 and the metal area of ​​the front shell 201. When the rear shell 202 is assembled onto the front shell 201, the rear shell 202 presses the grounding area 225 and the conductive foam together, and the conductive foam acts as a conductive medium to realize the electrical connection between the grounding area 225 and the metal area of ​​the front shell 201. However, due to the small size of the grounding area 225, and the fact that the rear shell 202 needs to press the grounding area 225 onto the conductive foam to achieve the electrical connection with the front shell 201, if the grounding area 225 and the conductive foam are not effectively bonded, there may be a risk of unstable grounding of the first flexible circuit board 60, resulting in poor static electricity discharge effect.

[0077] Based on the above problems, this application provides a design and assembly scheme for a new type of functional component 30, which increases the overall sealing and electrostatic protection capability of the electronic device 100.

[0078] Figure 10 A schematic diagram of the structure of the functional component 30 in the embodiments of this application is shown. Figure 11 A schematic diagram of the structure of the third flexible circuit board 40 in an embodiment of this application is shown.

[0079] like Figure 10As shown, in this embodiment, the functional component 30 includes a fingerprint module 61, a button switch assembly 82, and a third flexible circuit board 40. Both the fingerprint module 61 and the button switch assembly 82 are electrically connected to the main circuit board 511 via the third flexible circuit board 40. The third flexible circuit board 40 includes a first segment 401 and a second segment 402 connected in sequence. The first end of the first segment 401 is electrically connected to the fingerprint module 61, and the second end of the first segment 401 is connected to the first end of the second segment 402. The second end of the second segment 402 is connected to the third connector 35. The button switch assembly 82 is disposed on the second segment 402 and electrically connected to it. The button switch assembly 82 includes a first button switch 821, a second button switch 822, and a third button switch 823 arranged at intervals in sequence. The first button switch 821 is the switch closest to the third connector 35, and the third button switch 823 is the switch farthest from the third connector 35. All switches in the push-button switch assembly 82 are electrically connected to the third flexible circuit board 40. The switches have the characteristic of receding a certain distance after being pressed and rebounding after the pressure is released. Their internal components may include, for example, a resilient metal sheet. Exemplarily, the first push-button switch 821 and the second push-button switch 822 can serve as volume buttons to control the volume of the mobile phone 100, and the third push-button switch 823 can serve as a power button to control the mobile phone 100 to turn on or off.

[0080] In one example, the first segment 401 extends from the end of the third flexible circuit board 40 near the fingerprint module 61 to the position where the third push button switch 823 begins; the second segment 402 extends from the position of the third flexible circuit board 40 where the third push button switch 823 begins to the position where it connects to the third connector 35, that is, the first segment 401 and the second segment 402 are connected with the edge of the third push button switch 823 as the boundary line.

[0081] It should be noted that this application does not limit the number or type of switches in the button switch assembly 82. For example, in other embodiments, the number of switches may be 1, 2 or 4, and the switch type may be a camera button switch with a camera function.

[0082] See also Figure 11The first segment 401 of the third flexible circuit board 40 includes a first sub-segment 421, a second sub-segment 422, a third sub-segment 423, and a fourth sub-segment 424. The second segment 402 includes a fifth sub-segment 425 and a sixth sub-segment 426. The first sub-segment 421 is located between the fingerprint module 61 and the first reinforcing member 63, and is electrically connected to the fingerprint module 61. One end of the first sub-segment 421 is connected to the first end of the second sub-segment 422. The second sub-segment 422 extends along the length direction of the first sub-segment 421, that is, it extends along the negative Y-axis. The second end of the second sub-segment 422 is connected to the first end of the third sub-segment 423, which is a bent arc-shaped segment. The second end of the third sub-segment 423 is connected to the first end of the fourth sub-segment 424. The fourth sub-segment 424 extends in the opposite direction to the extension direction of the second sub-segment 422, that is, in the positive Y-axis direction. Extending further, the plane containing the fourth sub-segment 424 is parallel or nearly parallel to the plane containing the second sub-segment 422. The second end of the fourth sub-segment 424 is connected to the first end of the fifth sub-segment 425. The fifth sub-segment 425 is correspondingly provided with a first button switch 821, a second button switch 822, and a third button switch 823. The second end of the fifth sub-segment 425 is connected to the first end of the sixth sub-segment 426. The extension direction of the sixth sub-segment 426 forms an angle of approximately 90° with that of the fifth sub-segment 425. The second end of the sixth sub-segment 426 is electrically connected to the connector 35. The connector 35 is used to fasten onto the main circuit board 511 to achieve an electrical connection between the third flexible circuit board 40 and the main circuit board 511.

[0083] Figure 12 This is a schematic diagram illustrating the connection between the fingerprint module 61 and the push-button switch assembly 82 in functional component 30 of this application embodiment, via a flexible circuit board and the main circuit board 511. See also... Figure 12 and Figure 13 In this embodiment, to transmit the fingerprint electrical signal generated by the fingerprint module 61 to the main circuit board 511, the third flexible circuit board 40 (FPC3) includes power lines, fingerprint signal lines, switch signal lines, and GND lines. The power lines, fingerprint signal lines, and GND lines start from the position corresponding to the fingerprint module 61 and extend away from the fingerprint module, all the way to the connector 35; that is, the fingerprint signal lines are continuously arranged along the first portion 401 and the second portion 402. The switch signal lines start from the position corresponding to the button switch and extend away from the button switch, all the way to the connector 35; that is, the switch signal lines are arranged in the second portion 402. Through the above wiring method, the electrical signals generated by the fingerprint module 61 and the button switch assembly 82 can both be transmitted to the main circuit board 511 by the third flexible circuit board 40 (FPC3).

[0084] In this embodiment, the third flexible circuit board 40 is an integrated flexible circuit board. Signal transmission between the fingerprint module 61, the key switch assembly 82, and the motherboard 511 can be achieved using a single flexible circuit board. Compared to... Figure 3 Compared with the two separate flexible circuit boards in the related technologies shown, the solution of this application embodiment has a higher degree of integration, is easier to assemble, and can save one flexible circuit board, thereby reducing production costs.

[0085] Figure 13 Showing Figure 10 The exploded view of functional component 30 from a first-person perspective; Figure 14 Showing Figure 10 The exploded view of functional component 30 from a second-person perspective. See also... Figures 13-14 The shape of the fingerprint module 61 is the same as that of the fingerprint mounting hole 1211 (see...). Figure 2 The fingerprint module 61 has the same shape as the fingerprint mounting hole 1211, and can be rectangular, oval, or kidney-shaped. The length and width of the fingerprint module 61 are slightly smaller than the size of the fingerprint mounting hole 1211 so that the fingerprint module 61 can be inserted into the fingerprint mounting hole 1211. A fingerprint chip is installed inside the fingerprint module 61. The fingerprint chip can be a capacitive fingerprint chip, which uses the principle that different fingerprints with different shapes and uneven surfaces have different capacitance values ​​to identify different fingerprints. The first end of the first segment 421 of the third flexible circuit board 40 is attached to the fingerprint module 61 via the first adhesive member 611 to achieve electrical connection. The length direction of the first reinforcing member 63 is consistent with the length direction of the fingerprint module 61. An elastic member 64 is connected to the surface of the first reinforcing member 63 on the side away from the fingerprint module 61. The elastic member 64 includes an elastic body 641 and fixing portions 642 disposed at both ends of the elastic body 641. The elastic body 641 is adhered to the first reinforcing member 63, and the fixing portions 642 can be formed by extending from the end of the elastic body 641 towards the side away from the first reinforcing member 63. After the electronic device 100 is assembled, the fixing parts 642 at both ends of the elastic body 641 are used to fix it to the rear shell 202.

[0086] Functional component 30 includes a second reinforcing member 841 and a third reinforcing member 842, both of which are disposed on the surface of the third flexible circuit board 40 facing away from the push-button switch. The second reinforcing member 841 is fixed to the third flexible circuit board 40 by a second adhesive member 612 and is positioned opposite to the first push-button switch 821 and the second push-button switch 822. The third reinforcing member 842 is fixed to the third flexible circuit board 40 by a third adhesive member 613 and is positioned opposite to the third push-button switch 823. Furthermore, the second reinforcing member 841 is fixed to the first side surface 223 of the first sub-frame 2012 by a fourth adhesive member 614, and the third reinforcing member 842 is fixed to the first side surface 223 of the first sub-frame 2012 by a fifth adhesive member 615, thereby increasing the strength of the third flexible circuit board 40 and preventing damage to the third flexible circuit board 40 when the push-button switch is activated.

[0087] It should be noted that the second and third reinforcing members in this application are conductors. The number of reinforcing members in this application embodiment is not limited. The number of reinforcing members can be one or more, as long as there is a reinforcing member to support the position corresponding to the switch.

[0088] The functional component 30 also includes a pressing part 81, a first fixing part 812, a second fixing part 813, a first trigger part 814, and a second trigger part 815. The pressing part 81 includes a pressing surface 816 and an inner surface opposite to the pressing surface. The shape of the pressing part 81 is the same as the shape of the button mounting hole 1212, and can be rectangular, elliptical, oval, or other shapes. The length and width of the pressing surface 816 of the pressing part 81 are slightly smaller than the size of the button mounting hole 1212, so that the pressing part 81 can pass through the button mounting hole 1212 and the pressing surface 816 of the pressing part 81 protrudes from the button mounting hole 1212, making it convenient for the user to perform pressing operations. The first fixing part 812 and the second fixing part 813 are both connected to the inner surface of the pressing part 81 and are distributed at opposite ends of the pressing part 81 along its length. The pressing part 81 is fixed to the rear shell 202 by the first fixing part 812 and the second fixing part 813. The first trigger part 814 and the second trigger part 815 are also connected to the inner surface of the pressing part 81. The first trigger part 814 is set to correspond to the first button switch 821, and the second trigger part 815 is set to correspond to the second button switch 822. When the user presses a certain area of ​​the pressing surface 816 of the pressing part 81, the first trigger part 814 is driven to trigger the first button switch 821, or the second trigger part 815 is driven to trigger the second button switch 822, thereby realizing volume control.

[0089] In this embodiment, the fingerprint module 61 and the third button switch 823 are integrated together, that is, the fingerprint module 61 and the third button switch 823 are overlapped in the X-axis direction. The middle of the elastic element 64 of the fingerprint module 61 is also provided with a third trigger part 816. The third trigger part 816 protrudes from the side of the elastic body 641 facing away from the fingerprint module 61 and is provided corresponding to the third button switch 823. When the user presses the fingerprint module 61, the elastic element 64 can deform. The fixing part 642 of the elastic element 64 is used to fix it to the back cover 202. The fingerprint module 61, the first sub-segment 421 of the first segment 401 of the third flexible circuit board 40, the first reinforcing member 63, and the elastic body 641 of the elastic element 64 can move a certain distance toward the third button switch 823. This displacement causes the third trigger part 816 to press the third button switch 823, and the third button switch 823 to move inward a certain distance, thereby realizing the function of the power button. After the pressure is released, the third button switch 823 springs back, the elastic element 64 springs back, and the fingerprint module 61 returns to its initial position.

[0090] It should be noted that in some other embodiments of this application, the fingerprint module 61 and the third button switch 823 may not be integrated together, that is, the fingerprint module 61 and the third button switch 823 may not overlap in the X-axis direction, and the third button switch 823 may be triggered by a separate triggering part.

[0091] In this embodiment, the fingerprint module 61 and the pressing part 81 are both located on the same side of the electronic device 100 to satisfy the integrated design of the front and back of the electronic device 100.

[0092] Figure 15 Demonstrating Figure 10 The diagram shows the structure after the functional component 30 is assembled into the front shell 201 of the electronic device 100. Figure 16 Showing Figure 15 A magnified view of the local region Z3. See also... Figures 15-16In this embodiment of the application, after the functional component 30 is assembled onto the front shell 201 of the electronic device 100, the main body of the first part 401 and the second part 402 of the third flexible circuit board 40 are both housed in the groove 2231. That is, the first sub-segment 421, the second sub-segment 422, the third sub-segment 423, the fourth sub-segment 424 and the fifth sub-segment 425 of the third flexible circuit board 40 are all disposed on the side of the first side facing outward (towards the positive X-axis direction). Specifically, the first segment 421 of the third flexible circuit board 40 is connected to the fingerprint module 61. The first segment 421 and the second segment 422 extend in the opposite direction to the Y-axis, that is, along the first side 223 of the first sub-frame 20121. The third flexible circuit board 40 bends at the third segment 423. Then the fourth segment 424 and the fifth segment 425 extend in the positive direction of the Y-axis and also along the first side 223 of the first sub-frame 20121. Then the sixth segment 426 enters the area of ​​the main circuit board 511 in the first part of the first sub-frame 20121 and is then electrically connected to the main circuit board 511.

[0093] In this embodiment, the fingerprint module 61 and the button switch assembly 82 reuse the same third flexible circuit board 40, and the main body of the third flexible circuit board 40 is housed within the groove 2231. The third flexible circuit board 40 enters the main circuit board 511 area through the first part 20121a of the first sub-frame 20121, without needing to connect to the main circuit board through the second part 20121b of the first sub-frame 20121. Therefore, the second part 20121b of the first sub-frame 20121 does not need to have a clearance notch to avoid the flexible circuit board, thereby preventing external liquids from entering the battery compartment area through the clearance notch. Compared with the solutions in related technologies, this embodiment can improve the waterproof performance of the electronic device 100. In addition, by eliminating the clearance notch for avoiding the flexible circuit board, the first surface 221 of the first sub-frame 20121 facing the back shell 90 can be made flatter overall, thereby improving the bonding strength between the first surface 221 and the back shell 90.

[0094] See also Figure 14The third flexible circuit board 40 has a copper leakage area 41 on the surface facing the third reinforcement 842. Within the range of the copper leakage area 41, the surface insulating layer of the third flexible circuit board 40 is removed. The copper leakage area 41 is disposed opposite to the third reinforcement 842, that is, the projections of the copper leakage area 41 and the third reinforcement 842 in the X-axis direction coincide. Since the third reinforcing member 842 is a conductor, for example, the third reinforcing member 842 is a steel sheet, and the third adhesive member 613 and the fifth adhesive member 615 are both conductive adhesive members, for example, conductive adhesive, and the part of the first side 223 that is fixed to the third reinforcing member 842 is made of metal, the third reinforcing member 842 is fixed and electrically connected to the copper leakage area 41 through the conductive third adhesive member 613, and the third reinforcing member 842 is fixed and electrically connected to the first side 223 of the first sub-frame 20121 through the conductive fifth adhesive member 615, the static electricity generated in the fingerprint module 61 can be conducted to the third reinforcing member 842 through the copper leakage area 41 of the third flexible circuit board 40, and then released to the first sub-frame 20121 (i.e., the ground of the electronic device 100) through the third reinforcing member 842, thereby completing the release of static electricity.

[0095] It should be noted that the third flexible circuit board 40 can have one or more copper leakage areas 41. The position of the copper leakage area 41 can be opposite to the third reinforcing member 842 or the second reinforcing member 841. It is only necessary to ensure that at least one copper leakage area 41 corresponds to the reinforcing member 84 to achieve electrical connection between the copper leakage area 41 and the corresponding reinforcing member. In addition, the shape of the copper leakage area 41 is not limited to a specific shape. It can be circular, square, or other irregular shapes. The copper leakage area 41 can be a continuous or discontinuous structure.

[0096] It should be noted that the copper leakage area 41 of the third flexible circuit board 40 can also be directly electrically connected to the corresponding reinforcement, that is, there is no need to provide a conductive adhesive between the copper leakage area 41 and the corresponding reinforcement.

[0097] In this embodiment, by setting a copper leakage area 41 in the corresponding reinforcement area of ​​the third flexible circuit board 40, the reinforcement is used as part of the electrostatic discharge path, thereby achieving electrostatic discharge. This eliminates the need for an additional grounding area on the third flexible circuit board 40, simplifying the design of the flexible circuit board. Secondly, because the reinforcement has a large area, the copper leakage area 41 can be set to a larger area, and the bonding area between the reinforcement and the first side 223 of the first sub-frame 20121 is also large. Therefore, the grounding area is larger, and the grounding reliability is higher. When the third flexible circuit board 40 and the reinforcement are provided with conductive adhesive, the connection strength between the third flexible circuit board 40 and the reinforcement is high. Compared with the conductive foam pressing grounding method in related technologies, the bonding method in this embodiment is more robust.

[0098] Figure 17 for Figure 15 A magnified view of the local region Z4 in the middle; Figure 18 for Figure 15 A magnified view of a local area from another perspective. See also... Figure 17 and Figure 18 A through hole 20126 is provided on the first part 20121a of the first sub-frame 20121. The through hole 20126 penetrates the wall thickness of the first sub-frame 20121. The first sub-frame 20121 on the through hole 20126 forms a beam 20127. The sixth segment 426 of the third flexible circuit board 40 passes through the through hole 20126 and is connected to the third connector 35. The connector 35 is a board-to-board connector (BTB). The connector 35 is fastened to the bottom surface of the main circuit board 511.

[0099] Compared to related technologies, the functional component 30 of this application requires a first connector 65 and a second connector 85. Since this application uses a third flexible circuit board 40, this embodiment only requires one connector (the third connector 35). Furthermore, in related technologies, the contacts on the electrical connection surface of the second connector 85 are electrically connected to corresponding spring contacts on the edge of the motherboard circuit board 50. Because the connection position of the second connector 85 and the main circuit board 511 is close to the edge of the main circuit board in this connection method, the connection between the contacts and the spring contacts cannot be sealed with adhesive, resulting in the inability to effectively seal the second connector 85 of the fingerprint component 80 in related technologies. In this embodiment, the connection method of contacts and springs is eliminated. After the flexible circuit board passes through the through hole, it is connected to a BTB connector (third connector 35). At least part of the periphery of the third connector 35 can be sealed with a sealing material, such as sealing foam. Moreover, the gap between the through hole 20126 and the sixth segment 426 of the third flexible circuit board 40 can also be sealed with a sealing material, such as sealant. This can further improve the sealing level of the electronic device of this application and reduce the entry of liquid from the outside into the electronic device.

[0100] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A functional component applied to an electronic device, characterized in that, include: A fingerprint module, wherein the fingerprint module is used to generate fingerprint signals; A push-button switch, wherein the push-button switch is used to generate a switch signal; A flexible circuit board, comprising a first segment and a second segment connected in sequence, wherein the first segment is electrically connected to the fingerprint module and the second segment is electrically connected to the button switch, and the flexible circuit board is used to transmit the fingerprint signal and the switch signal.

2. The functional component according to claim 1, characterized in that, The functional component also includes a reinforcing member, which is a conductor, and the reinforcing member and the push-button switch are respectively disposed on opposite sides of the flexible circuit board; The reinforcing member is electrically connected to the flexible circuit board.

3. The functional component according to claim 2, characterized in that, The flexible circuit board has a copper leakage area on one side of its surface facing the reinforcement, and within the range of the copper leakage area, the insulating layer of the flexible circuit board is removed. The copper leakage area is electrically connected to the reinforcing member.

4. The functional component according to claim 3, characterized in that, The copper leakage area can be a continuous or discontinuous structure.

5. The functional component according to any one of claims 1-4, characterized in that, The flexible circuit board is provided with a fingerprint signal transmission line for transmitting fingerprint signals and a switch signal transmission line for transmitting switch signals. The fingerprint signal transmission line is set from the position corresponding to the fingerprint module and extends in a direction away from the fingerprint module. The switch signal transmission line is set from the position corresponding to the button switch and extends in a direction away from the button switch.

6. The functional component according to claim 5, characterized in that, The functional component also includes a connector, wherein the end of the second segment away from the first segment is electrically connected to the connector, and the connector is used for electrical connection to the main circuit board of the electronic device.

7. The functional component according to claim 1, characterized in that, The button switch is one of the following: power button switch, volume button switch, and camera button switch.

8. An electronic device, characterized in that, The electronic device includes: The middle frame includes opposing first and second surfaces; A display module is disposed on the first surface; A main circuit board, wherein the main circuit board is disposed on the second surface; Functional components, the functional components including: A fingerprint module, wherein the fingerprint module is used to generate fingerprint signals; A push-button switch, wherein the push-button switch is used to generate a switch signal; A flexible circuit board, comprising a first segment and a second segment connected in sequence, wherein the first segment is electrically connected to the fingerprint module and the second segment is electrically connected to the button switch, and the flexible circuit board is used to transmit the fingerprint signal and the switch signal to the main circuit board.

9. The electronic device according to claim 8, characterized in that, The functional component also includes a reinforcing member, which is a conductor, and the reinforcing member and the push-button switch are respectively disposed on opposite sides of the flexible circuit board; The reinforcing member is electrically connected to the flexible circuit board.

10. The electronic device according to claim 9, characterized in that, The flexible circuit board has a copper leakage area on one side of its surface facing the reinforcement, and within the range of the copper leakage area, the insulating layer of the flexible circuit board is removed. The copper leakage area is electrically connected to the reinforcing member.

11. The electronic device according to claim 10, characterized in that, The copper leakage area can be a continuous or discontinuous structure.

12. The electronic device according to any one of claims 8-11, characterized in that, The flexible circuit board is provided with a fingerprint signal transmission line for transmitting fingerprint signals and a switch signal transmission line for transmitting switch signals. The fingerprint signal transmission line is set from the position corresponding to the fingerprint module and extends in a direction away from the fingerprint module. The switch signal transmission line is set from the position corresponding to the button switch and extends in a direction away from the button switch.

13. The electronic device according to claim 12, characterized in that, The functional component also includes a connector, wherein the end of the second segment away from the first segment is electrically connected to the connector, and the connector is electrically connected to the main circuit board of the electronic device.

14. The electronic device according to claim 13, characterized in that, The button switch is one of the following: power button switch, volume button switch, and camera button switch.

15. The electronic device according to claim 14, characterized in that, The middle frame includes a front shell and a rear shell. The front shell includes a middle plate and a front shell frame. The front shell frame is arranged around the perimeter of the middle plate, and the rear shell is arranged around the perimeter of the front shell frame. The front shell frame includes a first sub-frame and a second sub-frame distributed along the width direction of the electronic device. The first sub-frame includes an outward first side and a second side disposed opposite to the first side. The reinforcing member is fixedly disposed on the first side and electrically connected to the first side.

16. The electronic device according to claim 15, characterized in that, The first segment of the flexible circuit board includes a first sub-segment, a second sub-segment, a third sub-segment, and a fourth sub-segment; The second segment of the flexible circuit board includes a fifth sub-segment and a sixth sub-segment; The first sub-segment is electrically connected to the fingerprint module, and one end of the first sub-segment is connected to the first end of the second sub-segment; The second sub-segment extends along the length direction of the first sub-segment, and the second end of the second sub-segment connects to the first end of the third sub-segment; The third sub-segment is an arc-shaped segment, and the second end of the third sub-segment is connected to the first end of the fourth sub-segment; The fourth sub-segment extends in the opposite direction to the extension direction of the second sub-segment, and the second end of the fourth sub-segment is connected to the first end of the fifth sub-segment; The fifth sub-segment is correspondingly provided with the push-button switch, and the second end of the fifth sub-segment is connected to the first end of the sixth sub-segment; The extension direction of the sixth sub-segment forms a certain angle with the extension direction of the fifth sub-segment, and the second end of the sixth sub-segment is electrically connected to the connector.

17. The electronic device according to claim 16, characterized in that, The first sub-segment, the second sub-segment, the third sub-segment, the fourth sub-segment, and the fifth sub-segment are all located on the outward-facing side of the first side.

18. The electronic device according to claim 17, characterized in that, The first sub-frame includes a first part and a second part, the first part being opposite to the main circuit board and the second part being opposite to the battery of the electronic device; A through hole penetrating the thickness of the first sub-frame is provided on the second part of the first sub-frame, and the sixth sub-segment is configured to pass through the through hole and be electrically connected to the connector.

19. The electronic device according to claim 18, characterized in that, The connector is a board-to-board connector, and at least a portion of the connector's perimeter is provided with sealing material.

20. The electronic device according to claim 18, characterized in that, The through hole is filled with sealing material.

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