Fingerprint identification device and electronic equipment

Abstract

The invention discloses a fingerprint identification device and electronic equipment, and aims to solve the technical problem that a flexible circuit board is easily connected with other structures on a middle frame. According to the fingerprint identification device, a fixing frame is arranged on the back surface of a fingerprint identification module, the fixing frame is connected with the fingerprint identification module, one end of a flexible circuit board is connected with the fingerprint identification module, and part of the flexible circuit board is wound on the mounting surface, deviating from the fingerprint identification module, of the fixing frame, so that the flexible circuit board is wound on the back surface of the fingerprint identification module; the flexible circuit board is prevented from extending along the length direction of the middle frame, so that the flexible circuit board is prevented from interfering with other structures on the middle frame.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic devices, and particularly to a fingerprint recognition device and an electronic device. Background Art

[0002] Generally, a fingerprint recognition device is installed on the middle frame of an electronic device (such as a mobile phone, a tablet computer, etc.). The flexible circuit board of the fingerprint recognition device extends along the length direction of the middle frame, and one end of the flexible circuit board is connected to the main board of the electronic device to realize the connection between the fingerprint recognition device and the main board. Since the flexible circuit board extends along the length direction of the middle frame, the flexible circuit board is likely to interfere with other structures (such as antennas, etc.) on the middle frame. Summary of the Invention

[0003] The embodiments of the present application provide a fingerprint recognition device and an electronic device, aiming to avoid interference between the flexible circuit board and other structures on the middle frame.

[0004] In a first aspect, the embodiments of the present application provide a fingerprint recognition device, including: a fingerprint recognition module, a flexible circuit board, and a fixing frame. One end of the flexible circuit board is connected to the fingerprint recognition module; the fixing frame is arranged on the back surface of the fingerprint recognition module and is connected to the fingerprint recognition module; a part of the flexible circuit board is wound around the mounting surface of the fixing frame facing away from the fingerprint recognition module.

[0005] With the above arrangement, the fixing frame is arranged on the back surface of the fingerprint recognition module, the fixing frame is connected to the fingerprint recognition module, one end of the flexible circuit board is connected to the fingerprint recognition module, and a part of the flexible circuit board is wound around the mounting surface of the fixing frame facing away from the fingerprint recognition module. Thus, the flexible circuit board is wound around the back surface of the fingerprint recognition module, avoiding the flexible circuit board from extending along the length direction of the middle frame, and further avoiding interference between the flexible circuit board and other structures on the middle frame.

[0006] In some embodiments that may include the above embodiments, the flexible circuit board includes a first board body and a second board body. The first board body covers one end of the fixing frame along the length direction, and the second board body covers the mounting surface; one end of the first board body is connected to the fingerprint recognition module, and the other end of the first board body is connected to one end of the second board body. With the above arrangement, the surfaces of the fixing frame where the flexible circuit board is located are all parallel to the thickness direction of the fixing frame, and the flexible circuit board does not increase the size of the fingerprint recognition device in the thickness direction of the electronic device, thereby facilitating the reduction of the thickness of the electronic device.

[0007] In some embodiments that may include the above embodiments, the flexible circuit board further includes a third board body located between the fingerprint recognition module and the fixing bracket. One end of the third board body is connected to the fingerprint recognition module, and the other end of the third board body is connected to one end of the first board body. With this arrangement, while the first board body is electrically connected to the fingerprint recognition module through the third board body, the third board body is clamped between the fingerprint recognition module and the fixing bracket, thereby realizing the fixation of the flexible circuit board and preventing the first board body from detaching from the fingerprint recognition module during transportation or assembly.

[0008] In an implementation where the fingerprint recognition module includes a substrate and a fingerprint sensor disposed on the substrate, pads are provided on the substrate, and the fingerprint sensor is electrically connected to the pads. One end of the third board body is welded to the pads, thereby realizing the electrical connection between the third board body and the fingerprint sensor. It can be understood that when the distance between the pads and the first board body is relatively far, the electrical connection between the first board body and the fingerprint sensor can be realized by providing the third board body. When the distance between the pads and the first board body is relatively close, the first board body can be directly connected to the pads to reduce the length of the flexible circuit board. Correspondingly, the substrate can be directly connected to the fixing bracket.

[0009] In some embodiments that may include the above embodiments, a first adhesive layer is provided between the second board body and the mounting surface, and the second board body is connected to the mounting surface through the first adhesive layer. Through the above arrangement, the first adhesive layer fixes the second board body on the mounting surface, which can prevent the second board body from moving relative to the mounting surface during use or assembly, and avoid contact between the flexible circuit board and other components in the electronic device.

[0010] In some embodiments that may include the above embodiments, a second adhesive layer is provided between one end of the first board body and the fixing bracket along the length direction, and the first board body is connected to the fixing bracket along the length direction through the second adhesive layer. Through the above arrangement, the second adhesive layer fixes the first board body on the fixing bracket, which can prevent the first board body from moving relative to the fingerprint recognition module, thereby avoiding the separation of the first board body from the fingerprint recognition module. In addition, the first board body contacts the fixing bracket through the second adhesive layer, which can prevent the edges and corners on the fixing bracket from damaging the flexible circuit board.

[0011] It can be understood that chamfers or rounded corners can be provided at the edges and corners where the fixing bracket contacts the flexible circuit board to further prevent the edges and corners from damaging the flexible circuit board.

[0012] In some embodiments that may include the above embodiments, a third adhesive layer is provided between the third plate and the fingerprint recognition module, and the third plate is connected to the fingerprint recognition module through the third adhesive layer; a fourth adhesive layer is provided between the third plate and the fixing frame, and the third plate is connected to the fixing frame through the fourth adhesive layer. In this way, the fixing frame and the fingerprint recognition module can be fixed by the third adhesive layer, the third plate, and the fourth adhesive layer, without the need to provide other fixing structures, thereby simplifying the structure of the fingerprint recognition device.

[0013] In some embodiments that may include the above embodiments, the fixing frame includes a frame body and a fixing plate, the frame body is connected to the fingerprint recognition module, the fixing plate is arranged on a side of the frame body away from the fingerprint recognition module, and the mounting surface includes a surface of the fixing plate away from the fingerprint recognition module. Since the mounting surface is connected to the flexible circuit board, the processing accuracy (such as surface roughness, flatness, etc.) of the mounting surface is relatively high, and the mounting surface is arranged on the fixing plate, which can reduce the processing difficulty of the frame body.

[0014] In some embodiments that may include the above embodiments, a mounting groove is provided on the surface of the frame away from the fingerprint recognition module, and at least part of the fixing plate is provided in the mounting groove. Such a configuration can avoid the fixing plate from occupying space, thereby reducing the volume of the fingerprint recognition device and facilitating the miniaturization of the electronic device. It is understandable that the fixing plate can be completely accommodated in the mounting groove, and the corresponding mounting surface can be flush with the surface of the frame away from the fingerprint recognition module; of course, the fixing plate can also be partially located in the mounting groove, that is, the mounting surface can protrude from the surface of the frame away from the fingerprint recognition module.

[0015] In some embodiments that may include the above embodiments, the mounting groove includes a first groove wall and a second groove wall that are arranged opposite to each other, the first groove wall is provided with a first notch, and the second groove wall is provided with a second notch; the fixing plate is provided with a first protrusion and a second protrusion, the first protrusion is arranged in the first notch, and the second protrusion is arranged in the second notch. The position of the fixing plate in the mounting groove can be limited by the first protrusion and the second protrusion to improve the position accuracy of the fixing plate.

[0016] In some embodiments that may include the above embodiments, a fifth adhesive layer is provided between the fixing plate and the frame, and the fixing plate is connected to the frame through the fifth adhesive layer. In this way, the fixing plate is fixed to the frame through the fifth adhesive layer, the structure is simple, and the connection is convenient.

[0017] In some embodiments that may include the above embodiments, the fingerprint recognition device also includes a resisting plate, and the fingerprint recognition device also includes a resisting plate, and a portion of the flexible circuit board is clamped between the mounting surface and the resisting plate; the resisting plate is arranged parallel to the mounting surface, and the surface of the resisting plate facing away from the mounting surface is used to resist a fingerprint button on the electronic device.

[0018] With such arrangement, the fingerprint recognition device presses against the fingerprint button on the electronic device through the pressing plate, thereby increasing the contact area between the fingerprint recognition device and the fingerprint button; when the position deviation between the fingerprint recognition device and the fingerprint button is large due to factors such as assembly tolerance, it is still possible to ensure complete contact between the pressing plate and the fingerprint button, that is, to absorb the assembly tolerance of the electronic device, while also ensuring the pressing feel of the fingerprint button.

[0019] In some embodiments that may include the above embodiments, a sixth adhesive layer is provided between the top plate and the flexible circuit board on the side of the fixing frame away from the fingerprint identification module, and the top plate is connected to the flexible circuit board through the sixth adhesive layer. The top plate and the flexible circuit board are fixed by the sixth adhesive layer, and then the top plate and the fixing frame are connected, which has a simple structure and is easy to connect.

[0020] In some embodiments that may include the above embodiments, a first fixing portion is provided on the fixing frame, and the first fixing portion is configured to be connected to the middle frame of the electronic device. In this way, the connection between the fixing frame and the middle frame can be achieved through the first fixing portion, so that the fingerprint recognition device is fixed on the middle frame.

[0021] In some embodiments that may include the above embodiments, the first fixing portion includes a fixing hole, the center line of the fixing hole is parallel to the mounting surface and perpendicular to the length direction of the fixing frame; a fixing may be provided on the side plate of the middle frame, and the fixing column is passed through the fixing hole to fix the fixing frame. It can be understood that a receiving groove is provided on the middle frame, and the receiving groove has an opening on the side facing the outside of the electronic device, the fingerprint recognition device is received in the receiving groove, and the fingerprint recognition module faces the opening; when the user performs fingerprint recognition, the finger can be placed close to the opening so that the finger is close to or in contact with the fingerprint recognition module. Exemplarily, the fixing column can be detachably connected to the middle frame, so that when installing, the fingerprint recognition device can be placed in the receiving groove first, and then the fixing column can be installed on the middle frame, and at the same time, the fixing column is passed through the fixing hole.

[0022] In some embodiments that may include the above embodiments, a second fixing portion is further provided on the fixing frame, the second fixing portion is spaced apart from the first fixing portion, and the second fixing portion is also configured to be connected to the middle frame of the electronic device. In this way, the fixing frame is fixed by the first fixing portion and the second fixing portion at the same time, which can improve the connection force between the fixing frame and the middle frame, thereby preventing the fixing frame from falling off.

[0023] In a second aspect, an embodiment of the present application further provides an electronic device, including: a middle frame and the fingerprint recognition device as described above, and the fixing frame of the fingerprint recognition device is connected to the middle frame. In the electronic device provided by the embodiment of the present application, the fixing frame of the fingerprint recognition device is arranged on the back of the fingerprint recognition module, the fixing frame is connected to the fingerprint recognition module, one end of the flexible circuit board is connected to the fingerprint recognition module, and a part of the flexible circuit board is wound around the mounting surface of the fixing frame facing away from the fingerprint recognition module, so that the flexible circuit board is wound around the back of the fingerprint recognition module, avoiding the flexible circuit board from extending along the length direction of the middle frame, and further avoiding interference between the flexible circuit board and other structures on the middle frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic structural diagram of a non-foldable electronic device provided by an embodiment of the present application;

[0025] Figure 2 FIG. is a schematic structural diagram of a foldable electronic device provided by an embodiment of the present application Figure 1 ;

[0026] Figure 3 FIG. is a schematic structural diagram of a foldable electronic device provided by an embodiment of the present application Figure 2 ;

[0027] Figure 4 FIG. is a schematic structural diagram of a foldable electronic device provided by an embodiment of the present application Figure 3 ;

[0028] Figure 5 FIG. is a schematic structural diagram of a fingerprint recognition device in the related art Figure 1 ;

[0029] Figure 6 FIG. is a schematic structural diagram of a fingerprint recognition device in the related art Figure 2 ;

[0030] Figure 7 FIG. is a schematic structural diagram of a fingerprint recognition device provided by an embodiment of the present application Figure 1 ;

[0031] Figure 8 FIG. is an exploded view of a fingerprint recognition device provided by an embodiment of the present application;

[0032] Figure 9 FIG. is a schematic structural diagram of a fingerprint recognition device provided by an embodiment of the present application Figure 2 ;

[0033] Figure 10 FIG. is an exploded view of a fixing frame in a fingerprint recognition device provided by an embodiment of the present application;

[0034] Figure 11Schematic diagram of the structure of the fingerprint recognition device provided by the embodiment of the present application when installed on the middle frame;

[0035] Figure 12 is Figure 11 Cross-sectional view taken along line A-A in the middle.

[0036] Description of reference numerals: 10: Electronic device; 20: Fingerprint recognition device; 101: Accommodation groove; 110: Middle frame; 111: Middle plate; 112: Side plate: 113: Main board; 114: Battery; 115: Antenna; 116: Volume button; 117: First middle frame; 118: Second middle frame; 119: Hinge; 120: Display panel; 121: Flexible display panel; 130: Rear cover; 210: Fingerprint recognition module; 211: Substrate; 212: Outer shell; 220: Flexible circuit board; 222: First plate body; 223: Second plate body; 224: Connection plate; 225: Third plate body; 230: Fixing frame; 231: Frame body; 232: Fixing plate; 233: Installation groove; 234: First notch; 235: Second notch; 236: First protrusion; 237: Second protrusion; 238: Fifth adhesive layer; 239: Installation surface; 241: First adhesive layer; 242: Second adhesive layer; 243: Third adhesive layer; 244: Fourth adhesive layer; 245: Sixth adhesive layer; 250: Top pressing plate; 251: Top pressing column; 260: First fixing part; 261: Fixing column; 262: Fixing groove; 270: Second fixing part. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0038] Hereinafter, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0039] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the accompanying drawings.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, an electrical connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium.

[0041] Please refer to Figure 1 , embodiments of the present application provide an electronic device 10, which may include a mobile phone, a tablet computer, a smart bracelet, a smart watch, AR, VR, etc. Embodiments of the present application do not limit the electronic device 10.

[0042] In the embodiments of the present application, the electronic device 10 may include a non-foldable electronic device and a foldable electronic device. In the implementation where the electronic device 10 includes a non-foldable electronic device, taking the electronic device 10 including a mobile phone as an example, the electronic device 10 includes a middle frame 110, a display panel 120, and a rear cover 130. The middle frame 110 includes a middle plate 111 and a side plate 112 surrounding the outer periphery of the middle plate 111. The side plate 112 and the middle plate 111 may be disposed substantially perpendicular or substantially parallel to each other. The display panel 120 covers one side of the middle plate 111 ( Figure 1 the left side in Figure 1 ), and the rear cover 130 covers the other side of the middle plate 111 (

[0043] the right side in

[0044] ). In the above implementation, the electronic device 10 further includes a main board 113 and a battery 114. The main board 113 may be disposed on the middle plate 111 of the middle frame 110, and the main board 113 may realize the control of the electronic device 10. The battery 114 may be disposed between the rear cover 130 and the middle plate 111 and connected to the middle plate 111 to fix the battery 114. In other implementations, the electronic device 10 may include a housing. Correspondingly, the main board 113 and the battery 114 may both be disposed in the housing, and the main board 113 and the battery 114 may be fixed through the housing. Figure 1 Continuing to refer to

[0045] In the embodiments of the present application, the electronic device 10 further includes a fingerprint recognition device 20. The fingerprint recognition device 20 is disposed on the side plate 112 and connected to the side plate 112 to fix the fingerprint recognition device 20; the fingerprint recognition device 20 is also electrically connected to the main board 113. Under the control of the main board 113, fingerprint detection can be realized through the fingerprint recognition device 20. Exemplarily, when the user's finger approaches or covers the fingerprint recognition device 20, the fingerprint information of the user can be detected, and then functions such as unlocking and mobile payment of the electronic device 10 can be realized, improving the user experience. In the implementation where the electronic device 10 includes a housing, the fingerprint recognition device 20 may also be disposed on the housing.In some implementations, structures such as an antenna or a volume button 116 are also provided on the side plate 112. Among them, the antenna is connected to the main board 113, enabling the electronic device 10 to transmit signals outward or receive external signals through the antenna to achieve communication; a volume key is provided on the main board 113, and the volume button 116 corresponds to the volume key. When the user presses the volume button, the volume button 116 touches the volume key to adjust the volume of the electronic device 10.

[0046] As Figure 2 shown, in other embodiments, the electronic device 10 may include a foldable electronic device. Correspondingly, the electronic device 10 may include a foldable mobile phone or a foldable tablet computer, etc. The foldable electronic device includes a middle frame 110 and a hinge 119. Among them, the middle frame 110 includes a first middle frame 117 and a second middle frame 118. The first middle frame 117 may include a first middle plate and a first side plate surrounding the outer periphery of the first middle plate; the second middle frame 118 may include a second middle plate and a second side plate surrounding the outer periphery of the second middle plate. The hinge 119 is disposed between the first middle frame 117 and the second middle frame 118, and the first middle frame 117 and the second middle frame 118 are connected by the hinge 119. The hinge 119 is configured to allow the first middle frame 117 to rotate relative to the second middle frame 118 to achieve folding or unfolding of the electronic device 10. Exemplarily, the hinge 119 may be connected to the first middle plate and / or the first side plate. Similarly, the hinge 119 may be connected to the second middle plate and / or the second side plate to achieve the connection between the hinge 119 and the first middle frame 117 and the second middle frame 118.

[0047] The foldable electronic device further includes a flexible display panel 121, a main board, and a battery. The flexible display panel 121 covers the same side of the first middle frame 117 and the second middle frame 118. When the first middle frame 117 rotates relative to the second middle frame 118, the flexible display panel 121 can be bent accordingly. The main board may be disposed on the first middle plate or the second middle plate, and the control of the electronic device 10 can be achieved through the main board 113; the battery may be disposed on the first middle plate or the second middle plate to fix the battery.

[0048] The foldable electronic device also includes a fingerprint recognition device 20. The fingerprint recognition device 20 is disposed on the first middle frame 117 or the second middle frame 118 to fix the fingerprint recognition device 20; the fingerprint recognition device 20 is also electrically connected to the main board, so that under the control of the main board, fingerprint detection can be achieved through the fingerprint recognition device 20. Exemplarily, when the user's finger approaches or covers the fingerprint recognition device 20, the fingerprint information of the user can be detected, and further functions such as unlocking and mobile payment of the electronic device 10 can be achieved, improving the user experience.

[0049] Continue to refer to Figure 2, it can be understood that when the first middle frame 117 and the second middle frame 118 are folded together, the flexible display panel 121 can be located outside the first middle frame 117 and the second middle frame 118. In other implementation manners, when the first middle frame 117 and the second middle frame 118 are folded together, the flexible display panel 121 can also be located inside the first middle frame 117 and the second middle frame 118, that is, the flexible display panel 121 is located between the first middle frame 117 and the second middle frame 118. The embodiments of the present application do not limit this.

[0050] As Figure 2 shown, in some implementation manners, the folding manner of the foldable electronic device can be horizontal folding. Of course, as Figure 3 shown, the folding manner of the foldable electronic device can also be vertical folding. The embodiments of the present application do not limit this.

[0051] Please refer to Figure 4 , in some embodiments, structures such as an antenna 115 or a volume button are further provided on the first middle frame 117 or the second middle frame 118. Among them, the antenna 115 is connected to the main board, so that the electronic device 10 can transmit signals outward or receive signals from the outside through the antenna 115 to implement communication; a volume key is provided on the main board 113, and the volume button corresponds to the volume key. When the user presses the volume button, the volume button touches the volume key to adjust the volume of the electronic device 10.

[0052] Please refer to Figure 5 and Figure 6 , in the related art, the fingerprint recognition device 20 includes a flexible circuit board 220, a fixing frame 230, and a fingerprint recognition module 210. Among them, the flexible circuit board 220 is clamped between the fixing frame 230 and the fingerprint recognition module 210, and the flexible circuit board 220 extends a certain distance along the length direction of the fixing frame 230 ( Figure 5 and Figure 6 the vertical direction in ) and then extends into the electronic device to be connected to the main board. The length of the flexible circuit board 220 extending along the length direction of the fixing frame 230 is relatively long, and it is easy to interfere with structures such as the volume button and the antenna on the middle frame.

[0053] Continue to refer to Figure 5 and Figure 6, one end of the fixing bracket 230 facing away from the fingerprint recognition module 210 is provided with an abutting column 251, and the abutting column 251 extends towards the inside of the electronic device. When the user presses the fingerprint recognition module 210, the fingerprint recognition module 210 moves towards the inside of the electronic device, causing the abutting column 251 to abut against the fingerprint button to trigger the fingerprint button. By using the abutting column 251 to abut against the fingerprint button, the contact area between the abutting column 251 and the fingerprint button is small. When there is a positional deviation between the fingerprint recognition device 20 and the fingerprint button due to factors such as assembly tolerances, it is easy for the abutting column 251 to have difficulty contacting the fingerprint button or for some of the abutting columns 251 to contact the fingerprint button, making the assembly of the electronic device 10 difficult; in addition, when some of the abutting columns 251 contact the fingerprint button, when the user presses the fingerprint recognition module 210, the reaction force feedback from the fingerprint button to the abutting column 251 is offset, thereby affecting the pressing feel and resulting in a poor user experience.

[0054] Please refer to Figure 7 and Figure 8 , the electronic device 10 provided in the embodiment of the present application includes a fingerprint recognition device 20, and the fingerprint recognition device 20 includes a fingerprint recognition module 210, wherein the fingerprint recognition module 210 is used to detect the fingerprint information of the user. Exemplarily, the fingerprint recognition module 210 may include a substrate 211 and a fingerprint sensor disposed on the substrate 211. The fingerprint sensor may include an optical fingerprint sensor, a semiconductor capacitance sensor, a semiconductor thermal sensor, a semiconductor pressure sensor, an ultrasonic sensor, a radio frequency RF sensor, etc. The embodiment of the present application does not limit this, as long as it is ensured that the fingerprint sensor can detect the fingerprint information of the user.

[0055] In the above implementation manner, the fingerprint recognition module 210 further includes a housing 212, the housing 212 covers the substrate 211, and the housing 212 and the substrate 211 can enclose an installation cavity, and the fingerprint sensor is accommodated in the installation cavity; the housing 212 includes a detection plane ( Figure 7 the left plane in the figure) parallel and spaced from the substrate 211, and the fingerprint sensor is disposed opposite to the detection plane. When the user's finger approaches or touches the detection plane, the fingerprint sensor can detect the fingerprint information of the user. Through the above settings, the housing 212 can protect the fingerprint sensor from damage and improve the service life of the fingerprint recognition module 210.

[0056] In the embodiment of the present application, the fingerprint recognition device 20 further includes a flexible circuit board 220 and a fixing bracket 230. The fixing bracket 230 is located on the back of the fingerprint recognition module 210, where the back surface may be the surface opposite to the detection plane. Exemplarily, the back surface may be the plane of the substrate 211 facing away from the fingerprint sensor; the fixing bracket 230 is connected to the fingerprint recognition module 210, and the fixing bracket 230 is configured to be the same as the middle frame 110 in the above embodiment (such asFigure 1 As shown in the figure, it is connected accordingly. Through the fixing bracket 230, the fingerprint recognition module 210 can be fixed on the middle frame 110 of the electronic device 10, thereby realizing the fixation of the fingerprint recognition device 20. One end of the flexible circuit board 220 is connected to the fingerprint recognition module 210, and the other end of the flexible circuit board 220 is configured to be connected to the main board 113 of the electronic device 10, thereby realizing the electrical connection between the fingerprint recognition module 210 and the main board 113. Through the flexible circuit board 220, the signal transmission between the fingerprint recognition module 210 and the main board 113 can be realized.

[0057] Continue to refer to Figure 7 and Figure 8 In the above implementation manner, the fixing bracket 230 has a mounting surface 239 facing away from the fingerprint recognition module 210. This mounting surface 239 can be arranged parallel to the substrate 211. Of course, this mounting surface 239 can also have a small included angle (such as 0° - 15°) with the substrate 211. Part of the flexible circuit board 220 is wound around the mounting surface 239, and after the flexible circuit board 220 is wound around the mounting surface 239, it is connected to the main board 113.

[0058] It can be understood that the length direction of the fixing bracket 230 ( Figure 7 the Z direction in the figure) is substantially the same as the length direction of the side plate 112, that is, the length direction of the fixing bracket 230 is substantially parallel to the length direction of the side plate 112 where it is located. The width direction of the fixing bracket 230 ( Figure 7 the X direction in the figure) is substantially perpendicular to the length direction of the side plate 112 where it is located and is substantially parallel to the middle plate 111. The thickness direction of the fixing bracket 230 ( Figure 7 the Y direction in the figure) is perpendicular to the middle plate 111, that is, the thickness direction of the fixing bracket 230 is the same as the thickness direction of the electronic device 10.

[0059] Continue to refer to Figure 7 and Figure 8 In some implementation manners, the flexible circuit board 220 can cover the mounting surface 239 after covering one end of the fixing plate 232 along the length direction. Exemplarily, the flexible circuit board 220 can include a first board body 222 and a second board body 223. The first board body 222 and the second board body 223 are arranged in sequence along the length direction of the flexible circuit board 220. The first board body 222 covers one end of the fixing bracket 230 along the length direction, and the second board body 223 covers the mounting surface 239, thereby enabling part of the flexible circuit board 220 to be wound around the mounting surface 239. One end of the first board body 222 is connected to the fingerprint recognition module 210, the other end of the first board body 222 is connected to one end of the second board body 223, and the other end of the second board body 223 is configured to be connected to the main board 113 (such as Figure 1is connected as shown, so as to achieve electrical connection between the fingerprint recognition module 210 and the main board 113 through the first board body 222 and the second board body 223.

[0060] It can be understood that the first board body 222 and the second board body 223 can be two parts of the same flexible circuit board 220 along the length direction, that is, the same flexible circuit board 220 is bent to form the first board body 222 and the second board body 223.

[0061] Among them, the end of the second board body 223 facing away from the first board body 222 is connected to the main board 113 to achieve electrical connection between the fingerprint recognition module 210 and the main board 113. Exemplarily, the flexible circuit board 220 may further include a connecting board 224. One end of the connecting board 224 is connected to the end of the second board body 223, and the other end of the connecting board 224 extends into the interior of the electronic device 10 (such as Figure 1 shown) and is then connected to the main board 113. In the embodiments of the present application, the shape of the connecting board 224 is not limited as long as the connection between the second board body 223 and the main board 113 can be achieved. Exemplarily, the connecting board 224 may be linear. Of course, the connecting board 224 may also be curved or bent. The embodiments of the present application do not limit this.

[0062] Through the above settings, the surfaces of the fixing frame 230 where the flexible circuit board 220 is located are all parallel to the thickness direction of the fixing frame 230. The flexible circuit board 220 will not increase the size of the fingerprint recognition device 20 along the thickness direction of the electronic device 10, and thus it is convenient to reduce the thickness of the electronic device 10.

[0063] Continue to refer to Figure 7 and Figure 8 , in the above implementation manner, the flexible circuit board 220 further includes a third board body 225. The third board body 225 is located between the fingerprint recognition module 210 and the fixing frame 230. One end of the third board body 225 is connected to the fingerprint recognition module 210, and the other end of the third board body 225 is connected to one end of the first board body 222. With such a setting, while the first board body 222 is electrically connected to the fingerprint recognition module 210 through the third board body 225, the third board body 225 is clamped between the fingerprint recognition module 210 and the fixing frame 230, thereby realizing the fixation of the flexible circuit board 220 and preventing the first board body 222 from detaching from the fingerprint recognition module 210 during transportation or assembly.

[0064] Exemplarily, the first board body 222, the second board body 223, and the third board body 225 can be three parts of the same flexible circuit board 220 along the length direction, that is, the same flexible circuit board 220 is bent to form the first board body 222, the second board body 223, and the third board body 225.

[0065] Continue to refer to Figure 7 andFigure 8 , in an implementation where the fingerprint recognition module 210 includes a substrate 211 and a fingerprint sensor disposed on the substrate 211, pads are provided on the substrate 211, and the fingerprint sensor is electrically connected to the pads. One end of the third plate body 225 is welded to the pads, thereby realizing the electrical connection between the third plate body 225 and the fingerprint sensor. It can be understood that when the distance between the pads and the first plate body 222 is relatively far, the electrical connection between the first plate body 222 and the fingerprint sensor can be realized by providing the third plate body 225. As Figure 9 shown, when the distance between the pads and the first plate body 222 is relatively close, the first plate body 222 can be directly connected to the pads to reduce the length of the flexible circuit board 220. Correspondingly, the substrate 211 can be directly connected to the fixing bracket 230.

[0066] Continuing to refer to Figure 7 and Figure 8 , for the fingerprint recognition device 20 provided in the embodiment of the present application, the fixing bracket 230 is disposed on the back surface of the fingerprint recognition module 210. The fixing bracket 230 is connected to the fingerprint recognition module 210. One end of the flexible circuit board 220 is connected to the fingerprint recognition module 210, and a part of the flexible circuit board 220 is wound around the mounting surface 239 of the fixing bracket 230 facing away from the fingerprint recognition module 210, thereby winding the flexible circuit board 220 to the back surface of the fingerprint recognition module 210, avoiding the flexible circuit board 220 extending along the length direction of the middle frame 110, and further avoiding interference between the flexible circuit board 220 and other structures on the middle frame 110.

[0067] Continuing to refer to Figure 7 and Figure 8 , in an implementation where the flexible circuit board 220 covers the mounting surface 239 after covering one end of the fixing plate 232 along the length direction, a first adhesive layer 241 is provided between the second plate body 223 and the mounting surface 239, and the second plate body 223 is connected to the mounting surface 239 through the first adhesive layer 241. Exemplarily, the material of the first adhesive layer 241 may include materials such as double-sided tape and thermosetting adhesives that can fix the second plate body 223 on the mounting surface 239. The embodiment of the present application does not limit the material of the first adhesive layer 241.

[0068] Through the above setting, the first adhesive layer 241 fixes the second plate body 223 on the mounting surface 239, which can prevent the second plate body 223 from moving relative to the mounting surface 239 during use or assembly, and avoid contact between the flexible circuit board 220 and other components in the electronic device 10.

[0069] In the above implementation, a second adhesive layer 242 is provided between one end of the first plate body 222 and the fixing frame 230 along the length direction, and the first plate body 222 is connected to one end of the fixing frame 230 along the length direction through the second adhesive layer 242. Exemplarily, the material of the second adhesive layer 242 may be the same as or different from that of the first adhesive layer 241. The embodiments of the present application do not limit the material of the second adhesive layer 242, as long as the first plate body 222 can be fixed on the fixing frame 230.

[0070] Through the above arrangement, the second adhesive layer 242 fixes the first plate body 222 on the fixing frame 230, which can prevent the first plate body 222 from moving relative to the fingerprint recognition module 210, and further prevent the first plate body 222 from separating from the fingerprint recognition module 210. In addition, the first plate body 222 contacts the fixing frame 230 through the second adhesive layer 242, which can prevent the edges and corners on the fixing frame 230 from damaging the flexible circuit board 220.

[0071] It can be understood that chamfers or rounded corners can be provided at the edges and corners where the fixing frame 230 contacts the flexible circuit board 220 to further prevent the edges and corners from damaging the flexible circuit board 220. Exemplarily, chamfers or rounded corners are provided between one end of the fixing frame 230 along the length direction and the mounting surface 239, and between one end of the fixing frame 230 along the length direction and the surface of the fixing frame 230 facing the fingerprint recognition module 210.

[0072] In the implementation where the flexible circuit board 220 includes a third plate body 225, a third adhesive layer 243 is provided between the third plate body 225 and the fingerprint recognition module 210, and the third plate body 225 is connected to the fingerprint recognition module 210 through the third adhesive layer 243; a fourth adhesive layer 244 is provided between the third plate body 225 and the fixing frame 230, and the third plate body 225 is connected to the fixing frame 230 through the fourth adhesive layer 244. With such an arrangement, the fixing between the fixing frame 230 and the fingerprint recognition module 210 can be achieved through the third adhesive layer 243, the third plate body 225, and the fourth adhesive layer 244, without setting other fixing structures, which simplifies the structure of the fingerprint recognition device 20.

[0073] It can be understood that the materials of the third adhesive layer 243 and the fourth adhesive layer 244 may be the same as or different from that of the first adhesive layer 241. The embodiments of the present application do not limit the materials of the third adhesive layer 243 and the fourth adhesive layer 244.

[0074] In some embodiments, the fixing frame 230 may be an integral structure. Correspondingly, the mounting surface 239 is a surface of the fixing frame 230 facing away from the fingerprint recognition module 210. Please refer to Figure 10In other embodiments, the fixing frame 230 may include a frame body 231 and a fixing plate 232. The frame body 231 and the fingerprint recognition module 210 (such as Figure 8 The mounting surface 239 is connected to the frame 231 and the mounting surface 239 is connected to the frame 231 (as shown in FIG. 1 ), the fixing plate 232 is arranged on the side of the frame 231 away from the fingerprint identification module 210, the fixing plate 232 is connected to the frame 231, and the mounting surface 239 includes a surface of the fixing plate 232 away from the fingerprint identification module 210. Since the mounting surface 239 is connected to the flexible circuit board 220, the machining accuracy (such as surface roughness, flatness, etc.) of the mounting surface 239 is relatively high, and the mounting surface 239 is arranged on the fixing plate 232, which can reduce the machining difficulty of the frame 231.

[0075] For example, the frame 231 may be roughly in the shape of a rectangular parallelepiped, and accordingly, the first plate 222 may cover the end surface of the frame 231 with a smaller area, and the fixing plate 232 may be installed on the surface adjacent to the end surface. Of course, the frame 231 may also be in other shapes, and the embodiment of the present application does not limit the shape of the frame 231.

[0076] Continue to refer to Figure 10 In the above implementation, the surface of the frame 231 facing away from the fingerprint recognition module 210 is provided with a mounting groove 233, and at least part of the fixing plate 232 is arranged in the mounting groove 233. Such a configuration can avoid the fixing plate 232 from occupying space, thereby reducing the volume of the fingerprint recognition device 20, and facilitating the miniaturization of the electronic device 10. It can be understood that the fixing plate 232 can be completely accommodated in the mounting groove 233, and the corresponding mounting surface 239 can be flush with the surface of the frame 231 facing away from the fingerprint recognition module 210; of course, the fixing plate 232 can also be partially located in the mounting groove 233, that is, the mounting surface 239 can protrude from the surface of the frame 231 facing away from the fingerprint recognition module 210.

[0077] In some embodiments, the mounting groove 233 includes a first groove wall and a second groove wall that are arranged opposite to each other, the first groove wall is provided with a first notch 234, and the second groove wall is provided with a second notch 235; the fixing plate 232 is provided with a first protrusion 236 and a second protrusion 237, the first protrusion 236 is arranged in the first notch 234, and the second protrusion 237 is arranged in the second notch 235. The first protrusion 236 and the second protrusion 237 can limit the position of the fixing plate 232 in the mounting groove 233 to improve the position accuracy of the fixing plate 232.

[0078] In the above implementation, a fifth adhesive layer 238 is provided between the fixing plate 232 and the frame 231, and the fixing plate 232 is connected to the frame 231 through the fifth adhesive layer 238. In this way, the fixing plate 232 is fixed to the frame 231 through the fifth adhesive layer 238, and the structure is simple and the connection is convenient. In the implementation in which at least part of the fixing plate 232 is located in the mounting groove 233, the fifth adhesive layer 238 is located between the bottom of the mounting groove 233 and the fixing plate 232, so as to fix the fixing plate 232 to the frame 231.

[0079] Of course, in other implementations, the fixing plate 232 and the frame 231 may also be connected by welding or bolting, and the embodiment of the present application is not limited to this, as long as the fixing plate 232 can be fixed to the frame 231.

[0080] Continue to refer to Figure 7 and Figure 8 In the embodiment of the present application, the fingerprint recognition device 20 further includes a top plate 250. A portion of the flexible circuit board 220 is sandwiched between the mounting surface 239 and the top plate 250. That is, the top plate 250 is disposed on the side of the portion of the flexible circuit board 220 on the mounting surface 239 away from the fingerprint recognition module 210. The top plate 250 can be connected to the flexible circuit board 220 on the mounting surface 239. The top plate 250 is disposed parallel to the mounting surface 239, and the surface of the top plate 250 away from the mounting surface 239 is used to resist the fingerprint button on the electronic device 10. Figure 5 and Figure 6 Compared with the related technology shown in the figure, through the above arrangement, the fingerprint recognition device 20 presses against the fingerprint button on the electronic device 10 through the pressing plate 250, thereby increasing the contact area between the fingerprint button and the fingerprint button; when the position deviation between the fingerprint recognition device 20 and the fingerprint button is large due to factors such as assembly tolerance, it is still possible to ensure complete contact between the pressing plate 250 and the fingerprint button, that is, to absorb the assembly tolerance of the electronic device 10, reduce the assembly difficulty of the electronic device 10, and also ensure the pressing feel of the fingerprint button.

[0081] It is understandable that the fingerprint button is set on Figure 1 The fingerprint recognition module 210 is electrically connected to the main board 113 shown in the figure. When the user presses the fingerprint recognition module 210, the fingerprint recognition module 210 moves toward the inside of the electronic device 10, so that the abutting plate 250 abuts against the fingerprint button to trigger the fingerprint button. The fingerprint button may include any one of the home button, mute button, etc. of the electronic device 10. The embodiment of the present application does not limit the function of the fingerprint button.

[0082] In the above implementation, a sixth adhesive layer 245 is provided between the top support plate 250 and the flexible circuit board 220 on the side of the fixing bracket 230 away from the fingerprint recognition module 210. The top support plate 250 is connected to the flexible circuit board 220 through the sixth adhesive layer 245. The fixing between the top support plate 250 and the flexible circuit board 220 is achieved through the sixth adhesive layer 245, thereby realizing the connection between the top support plate 250 and the fixing bracket 230. The structure is simple and the connection is convenient. Among them, the material of the sixth adhesive layer 245 may be the same as that of the first adhesive layer 241, and the embodiments of the present application do not limit the material of the sixth adhesive layer 245.

[0083] Please refer to Figure 11 and Figure 12 , in the embodiments of the present application, a first fixing portion 260 is provided on the fixing bracket 230, and the first fixing portion 260 is configured to be connected to the middle frame 110 of the electronic device. With such a setting, the connection between the fixing bracket 230 and the middle frame 110 can be realized through the first fixing portion 260, so as to fix the fingerprint recognition device 20 on the middle frame 110.

[0084] In some implementations, the first fixing portion 260 includes a fixing hole, and the center line of the fixing hole is parallel to the Figure 8 shown mounting surface 239 and perpendicular to the length direction of the fixing bracket 230; that is to say, the center line of the fixing hole is perpendicular to the Figure 1 shown middle plate 111 of the middle frame 110. Correspondingly, fixing posts 261 may be provided on the side plate 112 of the middle frame 110, and the fixing posts 261 are inserted into the fixing holes, so as to realize the fixing of the fixing bracket 230.

[0085] It can be understood that a receiving groove 101 is provided on the main board. The side of the receiving groove 101 facing the outside of the electronic device has an opening. The fingerprint recognition device 20 is received in the receiving groove 101, and the fingerprint recognition module 210 faces the opening; when the user performs fingerprint recognition, the finger can be brought close to the opening so that the finger approaches or touches the fingerprint recognition module 210. Exemplarily, the fixing posts 261 may be detachably connected to the middle frame 110. Thus, during installation, the fingerprint recognition device 20 can be first placed in the receiving groove 101, and then the fixing posts 261 are installed on the middle frame 110. At the same time, the fixing posts 261 are inserted into the fixing holes.

[0086] In the implementation manner where a fingerprint button is provided on the main board, a part of the fingerprint recognition module 210 may protrude from the opening to facilitate the user to press the fingerprint recognition module 210. When the user presses the fingerprint recognition module 210, the fixing bracket 230 is squeezed by the fingerprint recognition module 210 and moves towards the inside of the electronic device, so that the top support plate 250 touches the fingerprint button to trigger the fingerprint button. Among them, the fixing posts 261 are along the moving direction of the fixing bracket 230 (Figure 12 The width in the horizontal direction (in

[0087] In other implementation manners, the first fixing portion 260 may include fixing posts disposed on the fixing bracket 230. Correspondingly, fixing holes are provided on the side plates 112 of the middle frame 110, and the fixing posts are inserted into the fixing holes, which can also achieve the fixing of the fixing bracket 230. The embodiments of the present application do not limit the structure of the first fixing portion 260, as long as the fixing of the fixing bracket 230 can be achieved.

[0088] Continuing to refer to Figure 11 and Figure 12 , in some embodiments, a second fixing portion 270 is further provided on the fixing bracket 230. The second fixing portion 270 is disposed at an interval from the first fixing portion 260, and the second fixing portion 270 is also configured to be connected to the middle frame 110 of the electronic device. With such a setting, by simultaneously fixing the fixing bracket 230 through the first fixing portion 260 and the second fixing portion 270, the connection force between the fixing bracket 230 and the middle frame 110 can be improved, thereby avoiding the fixing bracket 230 from falling off.

[0089] Exemplarily, the first fixing portion 260 may be close to one end of the fixing bracket 230 along the length direction. The second fixing portion 270 may include a protrusion located at one end of the fixing bracket 230 along the length direction. Correspondingly, a fixing groove 262 is provided on the groove wall of the accommodating groove 101, and the protrusion is clamped in the fixing groove 262. Of course, in other implementation manners, the second fixing portion 260 may include a through hole provided on the fixing bracket 230. The center line of the through hole may be perpendicular to the center line of the fixing hole, and the center line of the through hole is parallel to the moving direction of the fingerprint recognition device 20. Correspondingly, a column body is provided on the middle frame 110, and the column body is inserted into the through hole.

[0090] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fingerprint recognition device, characterized in that, comprising: a fingerprint recognition module; a flexible circuit board, one end of the flexible circuit board is connected to the fingerprint recognition module; a fixing bracket, the fixing bracket is arranged on the back surface of the fingerprint recognition module, and the fixing bracket is connected to the fingerprint recognition module; part of the flexible circuit board is wound around the mounting surface of the fixing bracket facing away from the fingerprint recognition module.

2. The fingerprint recognition device according to claim 1, characterized in that, the flexible circuit board includes a first board body and a second board body, the first board body covers one end of the fixing bracket along the length direction, and the second board body covers the mounting surface; one end of the first board body is connected to the fingerprint recognition module, and the other end of the first board body is connected to one end of the second board body.

3. The fingerprint recognition device according to claim 1, characterized in that, the flexible circuit board includes a first board body, a second board body and a third board body, the first board body covers one end of the fixing bracket along the length direction, the second board body covers the mounting surface, the third board body is located between the fingerprint recognition module and the fixing bracket, one end of the third board body is connected to the fingerprint recognition module, the other end of the third board body is connected to one end of the first board body, and the other end of the first board body is connected to one end of the second board body.

4. The fingerprint recognition device according to claim 2 or 3, characterized in that, a first adhesive layer is arranged between the second board body and the mounting surface, and the second board body is connected to the mounting surface through the first adhesive layer.

5. The fingerprint recognition device according to any one of claims 2-4, characterized in that, a second adhesive layer is arranged between the first board body and one end of the fixing bracket along the length direction, and the first board body is connected to one end of the fixing bracket along the length direction through the second adhesive layer.

6. The fingerprint recognition device according to claim 3, characterized in that, a third adhesive layer is arranged between the third board body and the fingerprint recognition module, and the third board body is connected to the fingerprint recognition module through the third adhesive layer; a fourth adhesive layer is arranged between the third board body and the fixing bracket, and the third board body is connected to the fixing bracket through the fourth adhesive layer.

7. The fingerprint recognition device according to any one of claims 1-6, characterized in that, the fixing bracket includes a frame body and a fixing plate, the frame body is connected to the fingerprint recognition module, the fixing plate is arranged on the side of the frame body facing away from the fingerprint recognition module, and the mounting surface includes the surface of the fixing plate facing away from the fingerprint recognition module.

8. The fingerprint recognition device according to claim 7, characterized in that, a mounting groove is arranged on the surface of the frame body facing away from the fingerprint recognition module, and at least part of the fixing plate is arranged in the mounting groove.

9. The fingerprint recognition device according to claim 8, characterized in that, The installation groove includes a first groove wall and a second groove wall which are oppositely arranged. A first notch is provided on the first groove wall, and a second notch is provided on the second groove wall. The fixing plate is provided with a first protruding portion and a second protruding portion. The first protruding portion is arranged in the first notch, and the second protruding portion is arranged in the second notch.

10. The fingerprint recognition device according to any one of claims 7-9, wherein, a fifth adhesive layer is provided between the fixing plate and the frame body, and the fixing plate is connected to the frame body through the fifth adhesive layer.

11. The fingerprint recognition device according to any one of claims 1-10, wherein, the fingerprint recognition device further includes a pressing top plate. Part of the flexible circuit board is clamped between the installation surface and the pressing top plate. The pressing top plate is arranged parallel to the installation surface, and the surface of the pressing top plate facing away from the installation surface is used for pressing against the fingerprint button on the electronic device.

12. The fingerprint recognition device according to claim 11, wherein, a sixth adhesive layer is provided between the pressing top plate and the flexible circuit board on the side of the fixing frame away from the fingerprint recognition module, and the pressing top plate is connected to the flexible circuit board through the sixth adhesive layer.

13. The fingerprint recognition device according to any one of claims 1-12, wherein, the fixing frame is provided with a first fixing portion which is configured to be connected to the middle frame of the electronic device.

14. The fingerprint recognition device according to claim 13, wherein, the first fixing portion includes a fixing hole, and the center line of the fixing hole is parallel to the installation surface and perpendicular to the length direction of the fixing frame.

15. The fingerprint recognition device according to claim 13 or 14, wherein, the fixing frame is further provided with a second fixing portion which is arranged at an interval from the first fixing portion, and the second fixing portion is also configured to be connected to the middle frame of the electronic device.

16. An electronic device, wherein, comprising: a middle frame and the fingerprint recognition device according to any one of claims 1-15, and the fixing frame of the fingerprint recognition device is connected to the middle frame.

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