CN112162594B

CN112162594B - Electronic device

Info

Publication number: CN112162594B
Application number: CN202010935261.8A
Authority: CN
Inventors: 田昂; 孙斌; 李琴琴; 汪晓永
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2023-03-10
Anticipated expiration: 2040-09-08
Also published as: CN112162594A; WO2022052726A1

Abstract

The application provides an electronic equipment, which comprises a display screen, the metal front shell, nonmetal backshell and back of the body lid, be provided with the fingerprint mounting hole on the frame of backshell, be provided with two fixed columns on the inner wall of frame, two fixed columns are located the both sides on the length direction of fingerprint mounting hole respectively, be provided with key switch on the boss towards the fingerprint mounting hole of preceding shell, the fingerprint identification device includes the fingerprint module, the flexible circuit board, reinforcement and elastic component, the fingerprint module sets up in the fingerprint mounting hole and the surface of fingerprint module exposes outside the fingerprint mounting hole, the one end of flexible circuit board is connected between fingerprint module and reinforcement, the other end is connected with the mainboard electricity, the elastic component is connected in one side towards key switch of reinforcement, the both ends of elastic component are provided with the fixed part respectively, two fixed parts are connected respectively on two fixed columns. The application provides an electronic equipment, can install the side at electronic equipment with fingerprint identification device.

Description

Electronic device

Technical Field

The present application relates to the field of electronic devices, and in particular, to an electronic device with a fingerprint recognition device.

Background

The fingerprint identification device is a mode identification system comprising a fingerprint image acquisition module, a fingerprint image processing module, a characteristic extraction module and a comparison module, and the fingerprint identification device is applied to electronic equipment and can verify the identity of a user by comparing the fingerprint touching the fingerprint identification device with the fingerprint stored in advance. The fingerprint identification device can be generally arranged on the front face of the electronic equipment with the display screen, and along with the continuous popularization of the full-face screen, the fingerprint identification device is arranged on the side face of the electronic equipment and is applied.

In the related art, for the electronic equipment adopting the framework of the display screen, the metal middle frame and the back cover, the hole is formed in the metal middle frame, the fingerprint identification device is installed in the hole, and the assembling process is very simple. However, for the electronic device adopting the framework of the display screen, the metal front shell, the non-metal rear shell and the back cover, if the fingerprint identification device is to be installed on the side face of the electronic device, the matching of the fingerprint identification device, the front shell and the rear shell needs to be considered, the assembling mode is greatly different from that of the electronic device adopting the metal middle frame type, the structural design difficulty is high, and the assembling difficulty is high.

Disclosure of Invention

The application provides an electronic equipment, can install the side at electronic equipment with fingerprint identification device.

The application provides an electronic device, which comprises a display screen, a metal front shell, a non-metal rear shell and a back cover, wherein the display screen is connected to the front shell, the front shell and the back cover are respectively connected to two sides of the rear shell, the front shell, the back cover and the rear shell are enclosed to form an accommodating space, and a main board and a fingerprint identification device are arranged in the accommodating space; be provided with the fingerprint mounting hole on the frame of backshell, be provided with two fixed columns on the inner wall of frame, two fixed columns are located the ascending both sides of length direction of fingerprint mounting hole respectively, be provided with key switch on the boss towards the fingerprint mounting hole of preceding shell, fingerprint identification device includes the fingerprint module, the flexible circuit board, reinforcement and elastic component, the fingerprint module sets up in the fingerprint mounting hole and the surface of fingerprint module exposes outside the fingerprint mounting hole, the one end of flexible circuit board is connected between fingerprint module and reinforcement, the other end and the mainboard electricity of flexible circuit board are connected, the elastic component is connected the one side towards key switch at the reinforcement, the both ends of elastic component are provided with the fixed part respectively, two fixed parts are connected respectively on two fixed columns.

Electronic equipment's fingerprint identification device includes fingerprint module, flexible circuit board, reinforcement spare and elastic component, and fingerprint identification device can be from the internally mounted of backshell to the fingerprint mounting hole on the backshell lateral wall in to through on the fixed column with the elastic component both ends are fixed in the backshell, realize the pre-fixing between fingerprint identification device and the backshell. The elastic piece is with low costs, and occupation space is few, can not influence the structural strength of preceding shell, and with the backshell between the equipment degree of difficulty low, with fingerprint identification device after in advance fixing to the backshell, to the backshell assembly on the preceding shell influence little, can not lead to the device to collide with the damage, can improve electronic equipment's reliability.

In a possible implementation mode, the flexible circuit board comprises a first section, a second section, a third section and a fourth section which are connected in sequence, the first section is located between the fingerprint module and the reinforcing piece, the second section extends along the side wall of the frame, the third section is located between the frame and the boss, the fourth section extends along the inner surface of the back cover, and the end of the fourth section is buckled on the mainboard through the connector.

The flexible circuit board continues to extend along the side wall of the frame from the junction with the fingerprint module, then through the boss of the front shell, extends to one side of the front shell towards the back cover, and the lock is on the mainboard, thereby can realize the electric connection of fingerprint module and mainboard.

In a possible embodiment, the flexible circuit board is provided with a grounding area, a conductive copper foil is exposed on the surface of the grounding area facing the front shell, a conductive foam is adhered to the front shell through a conductive adhesive, and the conductive foam is sandwiched between the grounding area and the front shell.

The exposed copper foil in the grounding area is connected with the front shell through the conductive foam to realize grounding, the effect of electrostatic discharge can be achieved without connecting a protective device with high cost, devices on the mainboard cannot be damaged, and the safety is higher.

In a possible embodiment, the ground area is connected in the width direction of the third segment and is arranged close to the second segment, and the connection between the ground area and the third segment is provided with an arc-shaped groove which is concave towards the inside of the ground area.

A grounding area is arranged at the position, closest to the front shell, of the flexible circuit board, so that the shortest path grounding of static electricity can be realized; set up the arc wall and can play the effect of letting out the power, can prevent on the one hand that the flexible circuit board atress from tearing, on the other hand can reduce the pulling force of third section to the ground connection region, prevents that the ground connection state of ground connection region from becoming invalid, on the other hand, can reduce the pulling force of third section to the second section, can play the crooked effect of preventing the fingerprint module again.

In a possible implementation mode, the inner wall of the frame is convexly provided with a retaining wall, the surface of the retaining wall is parallel to the plane where the fingerprint module is located, and the second section is bonded on the retaining wall through back adhesive.

Set up like this, the plane at the second section place that can guarantee flexible circuit board on the one hand is parallel with the plane at first section place all the time, prevents that the crooked fingerprint module that drives of second section from taking place to be crooked, and on the other hand reliably fixes the second section on the backshell, can prevent that other parts of flexible circuit board from producing pulling force to the second section, prevents that the second section atress from taking place to incline and drive the fingerprint module and take place to be crooked.

In one possible embodiment, the reinforcing member is provided as a metal member, and the reinforcing member is connected by a conductive adhesive and a flexible circuit board.

The reinforcement is used for improving the holistic structural strength of fingerprint module, through being connected reinforcement and flexible circuit board electricity, can be with by the external static conduction to the flexible circuit board on the reinforcement of releasing, through flexible circuit board ground connection release again.

In a possible implementation mode, the inner wall of the frame is provided with a first coplanar limiting surface and a second coplanar limiting surface, the first limiting surface and the second coplanar limiting surface are respectively located on two sides of the length direction of the fingerprint mounting hole, the reinforcing piece comprises a metal piece main body and a limiting portion, the limiting portion is arranged at one end, close to the second section of the flexible circuit board, of the reinforcing piece, the limiting portion is a bulge on two wide sides of the metal piece main body, the limiting portion abuts against the first limiting surface, and one end, away from the limiting portion, of the reinforcing piece abuts against the second limiting surface.

The setting of the spacing face of first spacing face and second can prevent on the one hand that fingerprint identification device from deviating from the fingerprint mounting hole, and on the other hand can prevent that the reinforcement from damaging the metal on the flexible circuit board and walk the line.

In a possible implementation manner, the reinforcing part is provided with positioning columns, at least two positioning columns are arranged at intervals, the elastic part is provided with positioning holes, the positioning columns are matched and connected with the positioning holes, and the elastic part is bonded on the reinforcing part.

The locating column on the reinforcement and the locating hole cooperation setting on the elastic component to carry out the prepositioning at reinforcement and elastic component assembling process, take place crooked when can avoiding flexible elastic component to paste on the reinforcement through the prepositioning.

In a possible embodiment, the elastic member includes an elastic body and fixing portions disposed at two ends of the elastic body, the fixing portions are hooks connected to ends of the elastic body, and the hooks are disposed on the fixing posts.

The hook-shaped fixing part is hooked on the fixing column, so that the structure is simple, and the assembly is convenient.

In a possible embodiment, a trigger part is convexly arranged on one side of the elastic main body facing the key switch, and the trigger part and the key switch are arranged in a contact manner.

When the user pressed the fingerprint identification device, the elastic component can take place to warp, and fingerprint module, flexible circuit board's first section, reinforcement and elastic component can inwards advance a section distance, and this section displacement volume makes trigger part press key switch, and key switch inwards advances a section distance to realize the button function.

In one possible embodiment, the elastic element is made of thermoplastic polyurethane.

The elastic piece can be made of thermoplastic polyurethane, and the characteristic of variability of the elastic piece is utilized, so that the fingerprint identification device can be fixed on the rear shell, and can be displaced to press the trigger key switch.

In a possible implementation mode, the front shell comprises a horizontal support plate and an annular rib, the display screen is connected to the horizontal support plate, the annular rib is connected with the frame and encloses the display screen, a groove is formed in the frame between the fingerprint installation hole and the annular rib, and a protrusion, a protrusion and a groove are arranged on the annular rib in a plug-in fit mode.

Protruding card on the preceding shell is established in the recess on the shell of back, can increase the structural strength of the lateral wall on fingerprint mounting hole next door, can avoid pressing behind the fingerprint identification device, and the fingerprint module that near lateral wall emergence deformation leads to takes place crooked problem.

The embodiment of the application provides electronic equipment which is provided with a side fingerprint identification device, wherein the fingerprint identification device comprises a fingerprint module, a flexible circuit board, a reinforcing piece and an elastic piece, the fingerprint identification device can be installed in a fingerprint installation hole in the side wall of a rear shell from the inside of the rear shell, and the two ends of the elastic piece are fixed on fixing columns in the rear shell, so that the fingerprint identification device and the rear shell can be pre-fixed; a key switch is fixed at the position, facing the fingerprint mounting hole, of the front shell, the elastic piece is in contact with the key switch, the elastic piece can deform, and the key switch can be triggered after the fingerprint identification device is pressed, so that the fingerprint identification and key functions can be combined into a whole; the elastic piece is with low costs, and occupation space is few, can not influence the structural strength of preceding shell, and with the backshell between the equipment degree of difficulty low, with fingerprint identification device after in advance fixing to the backshell, to the backshell assembly on the preceding shell influence little, can not lead to the device to collide with the damage, can improve electronic equipment's reliability.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 2 is an exploded view of an electronic device according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present application;

FIG. 4 is an exploded view of the fingerprint recognition device provided in FIG. 3;

FIG. 5 is a schematic view of an assembly process of a rear housing and a fingerprint recognition device according to an embodiment of the present application;

FIG. 6 is an enlarged partial view of a rear housing provided in accordance with an embodiment of the present application;

FIG. 7 is a partial schematic structural view of a fingerprint recognition device mounted on a rear housing according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a fingerprint identification device and a rear case and a front case according to an embodiment of the present application;

FIG. 9 is a schematic view of another embodiment of a fingerprint identification device according to the present application;

FIG. 10 is a schematic partial cross-sectional view of a fingerprint identification device and front and rear housings assembled according to an embodiment of the present application;

fig. 11 is a schematic partial cross-sectional view of a fingerprint identification device according to an embodiment of the present application, wherein the fingerprint identification device corresponds to a front case and a rear case after being assembled.

Description of reference numerals:

100-an electronic device; 11-a display screen; 12-a rear shell; 120-a border; 1201. 1202, 1203, 1204-vias; 121-sidewalls; 1211-fingerprint mounting holes; 1212-grooves; 1214-retaining wall; 1215-a first limiting surface; 1216-a second stop surface; 122-an extension wall; 1221-fixing columns; 123-a bracket; 13-a front shell; 131-a horizontal support plate; 132-a boss; 133-annular ribs; 1331-bumps; 14-back cover; 15-a main board; 16-a battery;

200-fingerprint recognition means; 21-fingerprint module; 22-a flexible circuit board; 221-first stage; 222-a second segment; 223-third section; 224-fourth segment; 225-ground region; 226-an arc-shaped slot; 23-a reinforcement; 231-a sheet metal body; 232-positioning column; 233-a limiting part; 24-an elastic member; 241-an elastic body; 242 — a fixed part; 243-positioning holes; 244-a trigger; 25-a connector;

300-key switch.

Detailed Description

The embodiment of the application provides an electronic device, including but not limited to a mobile or fixed terminal device having a fingerprint identification device, such as a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, an interphone, a netbook, a POS machine, a Personal Digital Assistant (PDA), a wearable device, a virtual reality device, a wireless usb disk, a bluetooth sound, a bluetooth headset, or a vehicle-mounted device.

Among the correlation technique, to the electronic equipment who adopts the framework of display screen + metal center + back of the body lid, be provided with the fingerprint mounting hole on the metal center, the fingerprint identification device is including the fingerprint module, flexible circuit board and the stiffening plate that connect gradually, and the equipment order is in stretching into the fingerprint mounting hole with the fingerprint identification device from the outside in, again from the inboard of metal center, fixes the inboard at the metal center with the stiffening plate through the metal stand that sets up alone. The metal bracket occupies a large space and has high cost.

For the electronic equipment adopting the framework of the display screen, the metal front shell, the non-metal rear shell and the back cover, if the fingerprint identification device is fixed by adopting the metal bracket, on one hand, the occupied space of the metal bracket is large, the structural strength of the front shell can be influenced, the structural strength of the whole machine is reduced, and on the other hand, the increased metal bracket is high in cost. If do not adopt metal support to come to fix in advance fingerprint identification device, then the equipment degree of difficulty of preceding shell and backshell is higher, and the backshell lock is to the in-process of preceding shell, and the damage of colliding with can take place for the device on fingerprint identification device and the preceding shell.

Based on the above description, this application embodiment provides an electronic equipment with side fingerprint identification device, and fingerprint identification device includes fingerprint module, flexible circuit board, reinforcement spare and elastic component, and in the fingerprint mounting hole of the internally mounted to the backshell lateral wall of backshell that fingerprint identification device can be certainly to through on the fixed column with the elastic component both ends are fixed in the backshell, realize the pre-fixing between fingerprint identification device and the backshell. The elastic piece is with low costs, and occupation space is few, can not influence the structural strength of preceding shell, and with the backshell between the equipment degree of difficulty low, with fingerprint identification device after in advance fixing to the backshell, to the backshell assembly on the preceding shell influence little, can not lead to the device to collide with the damage, can improve electronic equipment's reliability.

The structure of the fingerprint identification device provided in the embodiments of the present application will be specifically described below with reference to the accompanying drawings and specific embodiments, in which the fingerprint identification device applied to a mobile phone is taken as an example. For convenience of description, in the drawings of the embodiments of the present application, directions of an X axis, a Y axis, and a Z axis respectively represent a length direction, a width direction, and a thickness direction of an electronic device, where a direction from a front side to a back side of the electronic device is a positive direction of the Z axis.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, and fig. 2 is an exploded schematic diagram of an electronic device according to an embodiment of the present disclosure. Referring to fig. 1 and 2, the electronic device 100 includes a display screen 11, a front case 13, a rear case 12, and a back cover 14, which are sequentially disposed, the display screen 11 and the back cover 14 respectively serve as a front surface and a back surface of the electronic device 100, a frame 120 of the rear case 12 serves as a side surface of the electronic device 100, the front case 13 and the back cover 14 are respectively connected to two sides of the frame 120 of the rear case 12, the front case 13, the back cover 14, and the frame 120 of the rear case 12 jointly enclose an accommodating space, and a motherboard, a battery, a camera module, and other components may be disposed in the accommodating space.

The back cover 14 may be made of ceramic, metal, plastic, etc., the rear case 12 may be made of plastic, and the front case 13 may be made of metal such as aluminum alloy. The back cover 14 is provided with an opening 141 corresponding to the camera module, and the back cover 14 can be connected with the rear case 12 by bonding, clamping, and the like. The frame 120 of the rear case 12 includes a side wall 121 and an extension wall 122, the side wall 121 serves as an outer frame of the electronic device 100, the extension wall 122 is formed by extending inward a side of the side wall 121 facing the back cover 14, and the back cover 14 may be connected to the extension wall 122 by bonding, clamping, or the like, so as to fix the back cover 14 and the rear case 12. The back cover 14 is provided with an opening 141 corresponding to the camera module, the rear housing 12 further includes a bracket 123, and the bracket 123 is connected inside the frame 120 and disposed close to the back cover 14 to support the camera module and other components.

The front case 13 may include a horizontal support plate 131 and a boss 132 protrudingly provided on the horizontal support plate 131, and the display screen 11 may be adhered to one surface of the horizontal support plate 131 and the other surface of the horizontal support plate 131 to be connected to a main board, a sub-board, a battery, etc. A boss 132 is protrudingly provided on a surface of the horizontal support plate 131 facing away from the display screen 11 for mounting a key switch or the like. The front shell 13 may be fixedly connected to the rear shell 12 by means of bonding, clamping, screwing, or the like.

The electronic device 100 is provided with a fingerprint identification device 200 for implementing a fingerprint identification function. Unlike the related art in which the fingerprint identification device 200 is disposed on the front or the back of the electronic apparatus 100, in the embodiment of the present application, the fingerprint identification device 200 may be disposed on a side of the electronic apparatus 100 to satisfy the integrated design of the front and the back of the electronic apparatus 100. The fingerprint recognition device 200 may be separately installed, or may be integrated with the function keys on the side of the electronic device 100, so as to reduce the number of components on the side of the electronic device 100 and improve the simplicity and beauty of the electronic device 100.

In the electronic device 100, the location of the power key may be closer to the location where the user holds the electronic device 100, for example, near the thumb, and the number of the power keys is one, so that the fingerprint recognition device 200 and the power key may be integrated from the viewpoint of user experience and design simplicity. In the embodiment of the present application, the fingerprint identification device 200 and the power key are integrated together as an example, and the structure and the assembly manner of the fingerprint identification device 200 are specifically described.

On the side wall 121 of the rear case 12, there may be provided a volume key, a through hole for guiding out sound of a speaker, a charging plug, headphone plugs 1201, 1202, 1203, 1204, and the like, respectively. In this embodiment, the side frame 121 is further provided with a fingerprint installation hole 1211, and the fingerprint identification device 200 is installed in the fingerprint installation hole 1211.

The structure of the fingerprint recognition device will be described in detail with reference to fig. 3 and 4.

Fig. 3 is a schematic structural diagram of a fingerprint identification device according to an embodiment of the present application, and fig. 4 is an exploded view of the fingerprint identification device shown in fig. 3. Referring to fig. 3-4, the fingerprint identification device 200 includes a fingerprint module 21, a flexible circuit board 22, a stiffener 23, an elastic member 24, and a connector 25.

Wherein, fingerprint module 21 is installed in fingerprint mounting hole 1211, and the surface of fingerprint module 21 exposes in electronic equipment 100's outside, provides the touch area for the user. The flexible circuit board 22 is connected to an inner surface of the fingerprint module 21 for electrically connecting the fingerprint module 21 to a main board inside the electronic device 100. The reinforcement 23 is connected on the surface of one side of keeping away from fingerprint module 21 of flexible circuit board 22, and reinforcement 23 can be stainless steel sheet for improve the holistic structural strength of fingerprint module 21. The elastic member 24 is connected to a side surface of the reinforcing member 23 away from the fingerprint module 21 for fixing the fingerprint module 21 to the rear case 12, and the elastic member 24 may be made of a material having a certain elasticity, such as TPU (Thermoplastic Polyurethane), rubber, and silica gel, by an integral injection molding process. A connector 25 is connected to an end portion of the flexible circuit board 22 for electrically connecting the flexible circuit board 22 and a main board inside the electronic apparatus 100.

Specifically, the shape of fingerprint module 21 is the same with the shape of fingerprint mounting hole 1211, can be rectangle, oval, waist circular shape etc. shape, and the length and width size of fingerprint module 21 slightly is less than the size of fingerprint mounting hole 1211 to make fingerprint module 21 wear to establish in fingerprint mounting hole 1211. Fingerprint module 21 is inside to be provided with the fingerprint chip, and the fingerprint chip can be capacitanc fingerprint chip, utilizes the principle that the capacitance value that the unevenness's of different shapes fingerprint corresponds is different to discern different fingerprints.

The flexible circuit board 22 comprises a first section 221, a second section 222, a third section 223 and a fourth section 224 which are sequentially connected, wherein the first section 221 is located between the fingerprint module 21 and the reinforcing part 23, the first section 221 of the flexible circuit board 22 is welded with the fingerprint module 21 through a surface mounting technology to achieve electric connection, gaps around welding spots are filled through dispensing, and sweat on fingers of a user can be prevented from entering the gaps to corrode the welding spots. The second section 222 is formed by the first section 221 extending continuously along the length direction thereof, and the plane where the first section 221 and the second section 222 are located may be parallel to the inner surface of the fingerprint module 21 and located in the XZ plane. The length extension direction of the third segment 223 may be disposed at an angle with the length extension direction of the second segment 222, and the angle is about 90 degrees. The third segment 223 may not be on the same plane, and may have the same width direction as the length extending direction of the second segment 222. The length extending direction of the fourth segment 224 and the length extending direction of the third segment 223 form an included angle, the included angle is also near 90 degrees, and the plane where the fourth segment 224 is located can be close to and perpendicular to the inner surface of the fingerprint module 21 and is located in the XY plane. The end of the fourth segment 224 is connected To a connector 25, and the connector 25 may be a BTB (Board To Board) connector for being snapped onto a motherboard To electrically connect the flexible circuit Board 22 and the motherboard.

The flexible circuit board 22 is further provided with a ground region 225, and the ground region 225 is used for connecting to the front case 13 made of metal to perform an electrostatic discharge function. The ground region 225 may be connected to a side of the third segment 223 facing the first segment 221 and disposed adjacent to the second segment 222. The flexible circuit board 22 is further provided with an arc-shaped slot 226, and the third section 223 of the arc-shaped slot 226 is connected with the grounding region 225 and is recessed towards the inner part of the grounding region 225.

The reinforcement 23 includes a metal sheet main body 231, the metal sheet main body 231 is rectangular as a whole, the length direction of the metal sheet main body 231 is consistent with the length direction of the first section 221, and the metal sheet main body 231 is electrically connected with the first section 221 of the flexible circuit board 22 through the conductive adhesive so as to conduct the static electricity released from the outside (including the user's finger) to the flexible circuit board 22, and then returns to the ground through the grounding region 225. The side of the reinforcing member 23 close to the second section 222 of the flexible circuit board 22 is adhered to the flexible circuit board 22 by glue, so as to prevent the sharp edge of the reinforcing member 23 from abrading the flexible circuit board 22 during repeated pressing of the fingerprint identification device 200. One end of the reinforcing member 23 close to the second section 222 of the flexible circuit board 22 is provided with a limiting part 233, the limiting part 233 is a protrusion formed by two wide sides of the metal sheet main body 231, and the limiting part 233 and the metal sheet main body 231 are coplanar.

The elastic member 24 includes an elastic body 241 and fixing portions 242 disposed at both ends of the elastic body 241, the elastic body 241 is adhered to the metal sheet body 231, and the fixing portions 242 may be formed by extending the end of the elastic body 241 toward a side away from the reinforcing member 23 for fixing to the rear case 12. The positioning columns 232 are arranged on one side, facing the elastic part 24, of the metal sheet main body 231 in a protruding mode, the number of the positioning columns 232 is at least two, the positioning columns 232 are arranged at intervals at certain distances, the positioning holes 243 are formed in the elastic main body 241, the positioning columns 232 and the positioning holes 243 are arranged in a matched mode, pre-positioning is carried out in the assembling process of the reinforcing part 23 and the elastic part 24, and deflection caused when the flexible elastic part 24 is pasted on the reinforcing part 23 can be avoided through the pre-positioning.

The middle portion of the elastic member 24 is further provided with a triggering portion 244, the triggering portion 244 is protruded from one side of the elastic main body 241 facing away from the fingerprint module 21, and the triggering portion 244 is disposed corresponding to a key switch inside the electronic device 100. The push-button switch has the characteristics of being concave for a certain distance after receiving a pressing force and rebounding after removing the pressing force, and the interior of the push-button switch can comprise a metal sheet with elasticity, for example. When the user presses the fingerprint identification device 200, the elastic member 24 can deform, the first section 221 of the fingerprint module 21 and the flexible circuit board 22, the reinforcing member 23 and the elastic main body 241 of the elastic member 24 can move inwards for a certain distance, the displacement of the section enables the trigger part 244 to press the key switch, and the key switch moves inwards for a certain distance, so that the function of the power key is realized. When the pressing force is removed, the key switch rebounds, the elastic piece 24 rebounds, and the fingerprint module 21 returns to the initial position.

In the embodiment of the present application, the elastic member 24 is arranged to pre-fix the fingerprint identification device 200 and the rear case 12, which is not only beneficial for assembly, but also the elastic member 24 is arranged as a strip-shaped sheet, which occupies a small space compared with the scheme using other support forms, and is beneficial for the compact design of the electronic device 100.

The engagement of the fingerprint recognition device 200 with the rear case 12 will be described in detail below with reference to fig. 5 to 7.

Fig. 5 is a schematic view illustrating an assembly process of a rear case and a fingerprint recognition device according to an embodiment of the present application, fig. 6 is a partially enlarged view of the rear case according to an embodiment of the present application, where an enlarged position corresponds to a position a in fig. 5, and fig. 7 is a partial structural view illustrating a fingerprint recognition device according to an embodiment of the present application mounted on the rear case. Referring to fig. 5 to 7, when the fingerprint recognition device 200 is assembled into the electronic apparatus 100, it is necessary to install the fingerprint recognition device 200 from the inside to the outside, i.e., from the inside of the rear case 12 to the inside of the fingerprint installation hole 1211 along the direction indicated by the arrow in the figure.

The two sides of the length direction of the fingerprint installation hole 1211 are respectively provided with a fixing column 1221, the fixing column 1221 is convexly arranged on the inner wall of the side wall 121 or convexly arranged on the wall surface of the extension wall 122, which faces away from the back cover 14, the fixing column 1221 extends towards the direction away from the back cover 14, namely, towards the reverse direction of the Z axis, so that the elastic member 24 is inserted between the fixing column 1221 and the inner wall surface of the side wall 121 along the positive direction of the Z axis, and the two fixing portions 242 are respectively hooked on the two fixing columns 1221, thereby limiting the displacement of the elastic member 24 in the X direction and the Y direction. The fixing portion 242 may be in the shape of an "L" or a "U" hook to be hooked on the fixing post 1221, or a closed "O" ring to be fitted over the fixing post 1221, or a protruding step to be engaged between the fixing post 1221 and the sidewall 121.

The inner wall of the frame 120 is further provided with a first limiting surface 1215 and a second limiting surface 1216, the first limiting surface 1215 and the second limiting surface 1216 are coplanar and are respectively located on two sides of the fingerprint installation hole 1211 in the length direction, the two first limiting surfaces 1215 can be respectively planes formed by inward recess on the side wall 121 and the extension wall 122, the two limiting portions 233 of the reinforcement 23 correspondingly abut against the two first limiting surfaces 1215, and one end of the reinforcement 23, which is far away from the limiting portions 233, is arranged in an extending manner relative to the fingerprint module 21 and abuts against the second limiting surface 1216. Therefore, the displacement of the fingerprint recognition device 200 in the negative Y-axis direction is restricted, and the fingerprint recognition device 200 is prevented from coming out of the fingerprint mounting hole 1211.

On the other hand, the reinforcing member 23 is abutted to the first limiting surface 1215 only through the limiting portion 233, and one end of the reinforcing member is abutted to the second limiting surface 1216, and the other parts of the reinforcing member are not in contact with the inner wall of the frame 120, and metal wires are not arranged on the flexible circuit board 22 between the limiting portion 233 and the first limiting surface 1215 and between the end extension section of the reinforcing member 23 and the second limiting surface 1216, so that the metal wires on the flexible circuit board 22 are prevented from being damaged after the reinforcing member 23 and the frame 120 are repeatedly contacted, and the service life of the flexible circuit board 22 is further prolonged.

When the fingerprint identification device 200 is installed in the fingerprint installation hole 1211, by using the characteristic that the elastic member 24 can be deformed, one of the fixing portions 242 of the elastic member 24 can be hooked on the fixing post 1221, then the fingerprint module 21 extends into the fingerprint installation hole 1211, so that the fingerprint module 21 is clamped in place in the fingerprint installation hole 1211, after the limiting portion 233 of the reinforcing member 23 is clamped in place in the limiting surface 1215, the other fixing portion 242 is hooked on the other fixing post 1221, so that the fingerprint identification device 200 is assembled on the rear case 12. For example, the fixing portion 242 near the second segment 222 may be hooked on the fixing post 1221 near the retaining wall 1214.

The assembly steps of pre-fixing the fingerprint identification device 200 on the rear case 12 are simple, the operation difficulty is low, the stability of batch assembly is high, and the improvement of the production efficiency and the reduction of the production cost are facilitated. Furthermore, after the fingerprint recognition device 200 is pre-fixed on the rear case 12, the fingerprint recognition device 200 will not affect the front case 13 when the rear case 12 is assembled on the front case 13, the rear case 12 can be directly fastened on the front case 13, and the fingerprint recognition device 200 and the key switch on the front case 13 are not easily damaged by the fingerprint recognition device 200 being separated from the fingerprint mounting hole 1211 during the assembling process.

The inner wall surface of the side wall 121 is further convexly provided with a retaining wall 1214, the plane where the retaining wall 1214 is located is parallel to the plane where the first section 221 of the flexible circuit board 22 is located, the distance between the plane where the retaining wall 1214 is located and the second end 222 of the flexible circuit board 22 is the same as the thickness value of the back adhesive, and the second section 222 of the flexible circuit board 22 is adhered to the retaining wall 1214 through the back adhesive, so that on one hand, the plane where the second section 222 of the flexible circuit board 22 is located can be ensured to be always parallel to the plane where the first section 221 is located, the fingerprint module 21 is prevented from being driven to be tilted by the second section 222 being skewed, on the other hand, the second section 222 is reliably fixed on the rear shell 12, the second section 222 can be prevented from being pulled by other parts of the flexible circuit board 22, and the fingerprint module 21 is prevented from being driven to be tilted when the second section 222 is stressed to be skewed.

There is an assembly gap between fingerprint module 21 and fingerprint mounting hole 1211, and when user's finger touched fingerprint module 21, because first section 221 of flexible circuit board 22 and reinforcement 23 all have metal, and the distance between and the finger is less than the distance between front shell 13 and the finger, therefore the static on user's finger can release to flexible circuit board 22 and reinforcement 23 on. If grounding is achieved by extending the flexible circuit board 22 to be connected to the main board, static electricity may damage devices on the main board, and if it is desired to avoid static electricity from damaging devices on the main board, it is necessary to connect a protection device to each line connecting the connector 25 and the main board, which occupies the area of the main board and increases the cost of the devices. In the embodiment of the application, the position that is closest to the front shell 13 at the distance of the flexible circuit board 22 is provided with the grounding area 225, the exposed copper foil at the grounding area 225 is connected with the front shell 13 through the conductive foam to realize grounding, the shortest path grounding of static electricity can be realized, the protection device with high connection cost is not needed, the effect of timely releasing static electricity can be realized, the device on the mainboard cannot be damaged, and the safety is higher.

Specifically, the conductive foam may be adhered to a specific region of the front case 13 by a conductive adhesive, and after the rear case 12 and the front case 13 are assembled, the conductive foam is in close contact with the exposed copper foil on the ground region 225 to achieve electrical conduction. The ground region 225 abuts against the extension wall 122 of the rear case 12 under the compression of the conductive foam and the front case 13, or the ground region 225 may be bonded to the extension wall 122 of the rear case 12. Compared with the scheme of adhering the conductive foam to the grounding region 225, the scheme of adhering the conductive foam to the front shell 13 is more favorable for accurately positioning the conductive foam relative to the front shell 13, so that reliable connection between the conductive foam and the grounding region 225 can be ensured.

After the fingerprint identification device 200 is mounted on the rear housing 12 and the second section 222 of the flexible circuit board 22 is adhered to the retaining wall 1214, the conductive foam is adhered to the front housing 13 by the conductive adhesive, and then the rear housing 12 is fastened to the front housing 13, so that the conductive foam is pressed on the grounding region 225, thereby achieving the connection between the grounding region 225 and the front housing 13.

The cooperation of the fingerprint recognition device 200 with the rear case 12 and the front case 13 will be described in detail below with reference to fig. 8 to 11.

Fig. 8 is a schematic structural view of a fingerprint identification device, a rear shell and a front shell according to an embodiment of the present application, fig. 9 is a schematic structural view of another angle of the fingerprint identification device according to an embodiment of the present application, and the angle of the fingerprint identification device in fig. 9 is the same as the angle in fig. 8. Referring to fig. 8 and 9, a main board 15 may be mounted on the front case 13 at a position corresponding to the bracket 123 of the rear case 12, a battery 16 may be mounted in the middle of the front case 13, a third section 223 of the flexible circuit board 22 extends from between the extension wall 122 of the rear case 12 and the boss 132 of the front case 13, the third section 223 and a fourth section 224 of a partial length are sandwiched between the battery 16 and the back cover 14, and an end of the fourth section 224 extends to the main board 15 and is fastened to the main board 15 by a connector 25.

Because the third section 223 of the flexible circuit board 22 needs to extend along the extension wall 122 of the rear case 12, the boss 132 of the front case 13, and the surface of the battery 16, and many positions of the third section 223 are in a bent state, the third section 223 and the fourth section 224 need to be pulled in the process of assembling the rear case 12 on the front case 13 and in the process of fastening the connector 25 on the motherboard 15, and under the conditions that the electronic device 100 is knocked after the assembly is completed, the third section 223 is pulled when being stressed, the grounding area 225 is driven to deform, the grounding state of the grounding area 225 may fail, and the joint between the third section 223 and the grounding area 225 is torn. The third segment 223 is forced to pull the second segment 222, which causes the fingerprint module 21 to be tilted. In this application embodiment, set up the arc wall 226 in third section 223 and the junction of ground connection region 225, arc wall 226 is sunken towards the inside of ground connection region 225, can play the effect of letting out power, on the one hand can prevent that flexible circuit board 22 atress from tearing, on the other hand can reduce the pulling force of third section 223 to ground connection region 225, prevent that ground connection region 225's ground connection state from becoming invalid, on the other hand, the effect of letting out power of arc wall 226 again, and the gum bonds the fixed action on barricade 1214 with second section 222, can play the crooked effect of preventing fingerprint module 21 jointly.

Fig. 10 is a schematic cross-sectional view of the fingerprint recognition device provided by an embodiment of the present application, wherein the cross-sectional position corresponds to B-B in fig. 8, and the front shell and the rear shell are assembled. Referring to fig. 10, an accommodating space is formed between the boss 132 of the front housing 13 and the sidewall 121 of the rear housing 12, the fingerprint identification device 200 is disposed in the accommodating space, the surface of the boss 132 facing the fingerprint installation hole 1211 is provided with a key switch 300, and when the fingerprint module 21 of the fingerprint identification device 200 is installed in the fingerprint installation hole 1211, the trigger portion 244 on the elastic member 24 contacts with the key switch 300. When the fingerprint module 21 is pressed, the trigger 244 applies pressure to the key switch 300, so that the key switch 300 can be triggered to realize the function of the power key.

Since the elastic member 24 has a certain elasticity and a low hardness, when the trigger portion 244 contacts and presses the key switch 300, the key switch 300 is not easily damaged, which is beneficial to prolonging the service life of the key switch 300. It should be noted that, the contact between the triggering portion 244 and the key switch 300 described in the embodiment of the present application is understood to be a contact within an allowable range of installation error, and there may be a small gap due to the installation error.

It should be noted that, in the embodiment of the present application, the key switch 300 may be electrically connected to the main board 15 through a flexible circuit board, a wire, or the like, and the key switch 300 and the fingerprint module 21 do not share the flexible circuit board, which facilitates the respective assembly of the key switch 300 and the fingerprint identification device 200, and may save the maintenance cost. And, when key switch 300 and fingerprint module 21 do not share the flexible circuit board, key switch 300's shell fragment sets up towards fingerprint module 21, and the user feels obvious when pressing key switch 300. When the key switch 300 and the fingerprint module 21 share the flexible circuit board, the key switch 300 of the key switch 300 needs to be arranged facing the front shell 13, and the hand feeling is poor when the key switch is pressed.

In this case, the power key 300 may share a flexible circuit board with the adjacent volume key, and the flexible circuit board may extend along the projection 132 of the front case 13 and be connected to the main board 15 by means of a resilient plate or the like.

Fig. 11 is a schematic view of a fingerprint recognition device according to an embodiment of the present application in partial cross section corresponding to the position of C-C in fig. 8 after the front and rear housings are assembled. Referring to fig. 11, the front case 13 further includes an annular rib 133, and the annular rib 133 is connected to an edge of the horizontal support plate 131 and is formed by extending the edge of the horizontal support plate 131 toward one side of the display screen 11. The annular rib 133 is connected to the side of the side wall 121 close to the display screen 11, and when the display screen 11 is connected to the horizontal support plate 131, the annular rib 133 surrounds the peripheral end face of the display screen 11.

Be located and be provided with recess 1212 on the lateral wall 121 between fingerprint mounting hole 1211 and the annular muscle 133, be provided with the arch 1331 that corresponds with recess 1212 on the annular muscle 133, protruding 1331 card is established in recess 1212, can increase the structural strength of the lateral wall 121 next to fingerprint mounting hole 1211, can avoid pressing behind the fingerprint identification device 200, and crooked problem takes place for fingerprint module 21 that the deformation leads to near lateral wall 121.

In summary, the assembly process of the electronic device 100 with the fingerprint identification device 200 according to the embodiment of the present application is to first mount the fingerprint identification device 200 into the fingerprint mounting hole 1211 of the rear case 12 from inside to outside, hook the fixing portions 242 at the two ends of the elastic member 24 onto the fixing posts 1221 on the rear case 12, and pre-fix the fingerprint identification device 200 and the rear case 12; next, the rear case 12 is mounted on the front case 13 to which the key switch 300 is fixed; finally, the connector 25 of the identification device 200 is snapped onto the main board 15.

The electronic equipment with side fingerprint identification device that this application embodiment provided, fingerprint identification device include fingerprint module, flexible circuit board, reinforcement spare and elastic component, and fingerprint identification device can be from the internally mounted of backshell to the fingerprint mounting hole on the backshell lateral wall in to through on the fixed column with the elastic component both ends in the backshell, can realize the pre-fixing between fingerprint identification device and the backshell. The position that faces the fingerprint mounting hole on the preceding shell is fixed with key switch, and elastic component and key switch contact set up, and the elastic component can take place to warp, can trigger key switch after pressing the fingerprint identification device to can realize fingerprint identification and key function unite two into one. The elastic piece is with low costs, and occupation space is few, can not influence the structural strength of preceding shell, and with the backshell between the equipment degree of difficulty low, with fingerprint identification device after in advance fixing to the backshell, to the backshell assembly on the preceding shell influence little, can not lead to the device to collide with the damage, can improve electronic equipment's reliability.

In the embodiments of the present application, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be understood in a broad sense, and may be, for example, fixedly connected, indirectly connected through an intermediate medium, connected through the inside of two elements, or in an interaction relationship between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations. The terms "first," "second," "third," and the like in the description and in the claims of the embodiments of the application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device is characterized by comprising a display screen, a metal front shell, a non-metal rear shell and a back cover, wherein the display screen is connected to the front shell, the front shell and the back cover are respectively connected to two sides of the rear shell, an accommodating space is defined by the front shell, the back cover and the rear shell, and a main board and a fingerprint identification device are arranged in the accommodating space;

the fingerprint identification device comprises a fingerprint module, a flexible circuit board, a reinforcing piece and an elastic piece, wherein the fingerprint module is arranged in the fingerprint mounting hole, the outer surface of the fingerprint module is exposed out of the fingerprint mounting hole, one end of the flexible circuit board is connected between the fingerprint module and the reinforcing piece, the other end of the flexible circuit board is electrically connected with the main board, the elastic piece is connected to one side of the reinforcing piece, which faces the key switch, the two ends of the elastic piece are respectively provided with a fixed part, and the two fixed parts are respectively connected to the two fixed columns;

the flexible circuit board comprises a first section, a second section, a third section and a fourth section which are sequentially connected, the first section is located between the fingerprint module and the reinforcing piece, the second section extends along the side wall of the frame, the third section is located between the frame and the boss, and the length extending direction of the third section and the length extending direction of the second section form an included angle; the fourth section extends along the inner surface of the back cover, and the end part of the fourth section is buckled on the main board through a connector; the length extending direction of the fourth section and the length extending direction of the third section form an included angle;

the flexible circuit board is provided with a grounding area, a conductive copper foil is exposed on the surface of the grounding area facing the front shell, conductive foam is adhered to the front shell through conductive glue, and the conductive foam is clamped between the grounding area and the front shell;

the grounding area is connected to the width direction of the third section and is arranged close to the second section, and an arc-shaped groove which is concave towards the inside of the grounding area is arranged at the joint of the grounding area and the third section.

2. The electronic device of claim 1, wherein a retaining wall is convexly arranged on the inner wall of the frame, the surface of the retaining wall is parallel to the plane where the fingerprint module is located, and the second section is adhered to the retaining wall through a back adhesive.

3. The electronic device according to claim 1 or 2, wherein the reinforcing member is provided as a metal member, and the reinforcing member is connected to the flexible circuit board by a conductive adhesive.

4. The electronic device according to claim 1 or 2, wherein a first limiting surface and a second limiting surface which are coplanar are disposed on an inner wall of the frame, the first limiting surface and the second limiting surface are respectively located on two sides of the fingerprint mounting hole in the length direction, the reinforcing member includes a metal member main body and a limiting portion, the limiting portion is disposed at one end of the reinforcing member close to the second section of the flexible circuit board, the limiting portion is a protrusion on two wide sides of the metal member main body, the limiting portion abuts against the first limiting surface, and one end of the reinforcing member away from the limiting portion abuts against the second limiting surface.

5. The electronic device according to claim 1 or 2, wherein the reinforcing member is provided with positioning posts, at least two positioning posts are spaced apart from each other, the elastic member is provided with positioning holes, the positioning posts are in fit connection with the positioning holes, and the elastic member is adhered to the reinforcing member.

6. The electronic device according to claim 1 or 2, wherein the elastic member includes an elastic body and fixing portions provided at both ends of the elastic body, the fixing portions are hooks connected to ends of the elastic body, and the hooks are provided on the fixing posts.

7. The electronic device according to claim 6, wherein a trigger portion is convexly disposed on a side of the elastic body facing the key switch, and the trigger portion is disposed in contact with the key switch.

8. An electronic device according to claim 1 or 2, characterized in that the elastic member is made of thermoplastic polyurethane.

9. The electronic device according to claim 1 or 2, wherein the front shell comprises a horizontal support plate and an annular rib, the display screen is connected to the horizontal support plate, the annular rib is connected to the frame and surrounds the display screen, a groove is formed in the frame between the fingerprint mounting hole and the annular rib, a protrusion is formed in the annular rib, and the protrusion is in insertion fit with the groove.