CN111277683A

CN111277683A - Fixed subassembly and electronic equipment of fingerprint module

Info

Publication number: CN111277683A
Application number: CN202010054183.0A
Authority: CN
Inventors: 宋飞飞; 陈堃; 张永发; 赵波
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-06-12
Anticipated expiration: 2040-01-17
Also published as: CN111277683B

Abstract

The application provides a fixed subassembly of fingerprint module, the fingerprint module includes module body, first circuit board and connector, fixed subassembly includes: the second circuit board is used for bearing the connector and electrically connected with the connector; the middle frame is arranged on one side of the connector, which is far away from the second circuit board, so that the middle frame is matched with the second circuit board to clamp and fix the connector; one end of the first circuit board is electrically connected with the module body, and the other end of the first circuit board is electrically connected with the connector so as to conduct the module body and the second circuit board. The fixed subassembly of fingerprint module that this application embodiment provided, through the connector of the fixed fingerprint module of center cooperation second circuit board centre gripping, avoid addding the connector that other structural component fixed the fingerprint module, when reducing the electronic equipment cost, can also promote the assembly efficiency of complete machine.

Description

Fixed subassembly and electronic equipment of fingerprint module

Technical Field

The application relates to the technical field of electronic equipment structures, in particular to a fixed assembly of a fingerprint module and electronic equipment.

Background

With the development of electronic devices such as mobile phones (e.g., mobile phones, smart wearable devices, etc.), a fingerprint module for fingerprint recognition has become a basic configuration of the electronic devices, and can conveniently perform unlocking and waking functions of the electronic devices.

However, the structural component of fingerprint module is more relatively, and has higher requirement to fingerprint identification's precision, in order to improve the reliability of electronic equipment fingerprint module, avoids appearing falling back fingerprint module not hard up and lead to fingerprint identification inefficacy scheduling problem, and the fixed scheme of fingerprint module becomes the technical problem who awaits a urgent need to be solved.

Disclosure of Invention

An aspect of the embodiment of the application provides a fixed subassembly of fingerprint module, the fingerprint module includes module body, first circuit board and connector, fixed subassembly includes: the second circuit board is used for bearing the connector and electrically connected with the connector; the middle frame is arranged on one side of the connector, which is far away from the second circuit board, so that the middle frame is matched with the second circuit board to clamp and fix the connector; one end of the first circuit board is electrically connected with the module body, and the other end of the first circuit board is electrically connected with the connector so as to conduct the module body and the second circuit board.

On the other hand of the embodiment of this application still provides an electronic equipment, including preceding shell, backshell, aforementioned embodiment fingerprint module and fingerprint module's fixed subassembly, wherein, preceding shell the backshell and the center encloses establishes and forms the accommodation space, the second circuit board hold set up in the accommodation space, the module body is worn to locate the backshell is in order to be used for the touch.

The fixed subassembly of fingerprint module that this application embodiment provided, through the connector of the fixed fingerprint module of center cooperation second circuit board centre gripping, avoid addding the connector that other structural component fixed the fingerprint module, when reducing the electronic equipment cost, can also promote the assembly efficiency of complete machine.

The electronic equipment that this application embodiment provided forms fixed subassembly through the center and the second circuit board that utilize electronic equipment itself, and then the connector of the fixed fingerprint module of centre gripping avoids additionally increasing structural component in order to fix the connector, and occupies the inside space of electronic equipment to influence the structural layout of electronic equipment inner space, also can cause the rising of complete machine cost simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an electronic device in some embodiments of the present application;

FIG. 2 is a schematic diagram of a fingerprint module according to some embodiments of the present application;

FIG. 3 is a schematic diagram of a portion of a fixing assembly of the fingerprint module according to some embodiments of the present disclosure;

FIG. 4 is a partial schematic structural view from another perspective of a retaining assembly according to some embodiments of the present application;

FIG. 5 is a schematic view of the cross-sectional view of FIG. 3 taken along line A-A;

FIG. 6 is a schematic diagram of the substrate connected to a second circuit board according to some embodiments of the present disclosure;

FIG. 7 is a schematic view of a portion of a retaining assembly according to further embodiments of the present disclosure;

FIG. 8 is a schematic view of a portion of a retaining assembly according to further embodiments of the present application;

FIG. 9 is a schematic view of a portion of a retaining assembly according to further embodiments of the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

It should be noted that the electronic device in the embodiment of the present application is mainly directed to an electronic device having a fingerprint module, so that the fingerprint module can be used to quickly execute the unlocking and waking functions of the electronic device. The fingerprint module can be roughly divided into front fingerprint identification, rear fingerprint identification and fingerprint identification under the screen, and based on the development of large-screen electronic equipment and the requirement of screen occupation ratio, the rear fingerprint identification makes its application comparatively extensive because of the advantage that does not occupy screen space and cost are lower. In the embodiment of the present application, the electronic device is exemplified by the post fingerprint recognition, but of course, is not limited thereto. It can be understood that the electronic device in the embodiment of the present application may be a mobile phone.

Further, the fingerprint module applied to the electronic device in the embodiment of the present application may substantially include a module body, a first circuit board and a connector. The two ends of the first circuit board are respectively communicated with the module body and the connector so as to conduct the module body and the connector. Specifically, the module body substantially comprises a fingerprint sensing device and a fingerprint chip, and is a key device for realizing automatic fingerprint acquisition and identification. The fingerprint information that the module body acquireed and was handled is conducted the mainboard of electronic equipment in order to discern through the circuit board. The connector is a connecting device for connecting and fixing the circuit board, and in the embodiment of the application, the connector is used for electrically connecting the circuit board and the main board of the electronic equipment so as to conduct the fingerprint information acquired by the module body. Therefore, it can be understood that the connection robustness of the connector to the main board of the electronic device is crucial to fingerprint recognition.

The applicant finds in research that the stability of the connection between the connector of the fingerprint module and the main board can be enhanced by additionally providing a fixing structure, such as a metal cover plate separately provided for fixing the connector. However, in this way, an additional structural component is required to fix the connector, which occupies the internal space of the electronic device, affects the layout of the electronic device, and also increases the cost of the whole electronic device.

For solving the above problem, the idea of this embodiment is that the connector is fixed by using the structure of the electronic device itself, so that the connector can be fixed while the internal space of the electronic device is not occupied, and the cost is not increased.

Further, referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 10 according to some embodiments of the present application, where the electronic device 10 may be any device having a fingerprint module, for example: smart devices such as tablet computers, mobile phones, cameras, personal computers, notebook computers, vehicle-mounted devices, wearable devices, and the like.

Specifically, the electronic device 10 may generally include a front case 100, a rear case 200, a middle frame 300 and a fingerprint module 400, wherein the front case 100, the rear case 200 and the middle frame 300 are enclosed to form an accommodating space 101, and the fingerprint module 300 is partially accommodated in the accommodating space 101. Wherein, the middle frame 300 is disposed between the front case 100 and the rear case 200 and connects the front case 100 and the rear case 200. In the structural application of the electronic device 10, the middle frame 300 is generally used to carry or fix the internal components of the electronic device 10, such as a motherboard, a battery, etc.

Further, referring to fig. 2, fig. 2 is a schematic structural diagram of the fingerprint module 400 according to some embodiments of the present disclosure, and the fingerprint module 400 may generally include a module body 410, a first circuit board 420 and a connector 430, wherein the first circuit board 420 is electrically connected to the module body 410 and the connector 430 respectively to conduct the module body 410 and the connector 430. It can be understood that the first circuit board 420 and the connector 430 are accommodated in the accommodating space 101, and the module body 410 is disposed through the rear case 200 for touching, thereby implementing a fingerprint identification function. In other words, the module body 410 is partially accommodated in the accommodating space 101, the rear case 200 is provided with a fingerprint hole 210, and the module body 410 is disposed through the fingerprint hole 210 to be exposed outside the electronic device 10 for facilitating touch. The portion of the module body 410 accommodated in the accommodating space 101 is electrically connected to the first circuit board 320.

It should be noted that the first circuit board 420 may be a flexible circuit board, i.e. a flexible printed circuit board made of polyimide or polyester film as a base material and having high reliability and excellent performance. The first circuit board 420 has the characteristics of high wiring density, light weight, thin thickness and good bending property, so as to facilitate the layout of the internal space of the electronic device 10.

The embodiment of the application provides a fixed subassembly of fingerprint module, and this fingerprint module can be fingerprint module 400 in above-mentioned embodiment, the fixed subassembly that this application embodiment provided is in order to be used for fixed fingerprint module 400 in electronic equipment 10 in above-mentioned embodiment. Further, the fixing assembly provided in the embodiment of the present application is used to fix the connector 430 in the electronic device 10.

Specifically, referring to fig. 3 and fig. 4 in combination, fig. 3 is a partial structural diagram of a fixing element 500 of the fingerprint module 400 in some embodiments of the present application, and fig. 4 is a partial structural diagram of another view angle of the fixing element 500 in some embodiments of the present application. The fixing assembly 400 is accommodated in the accommodating space 101 of the electronic device 10. Further, the fixing assembly 400 may generally include a second circuit board 510 and the middle frame 300 in the above embodiment, wherein the second circuit board 510 is used for carrying the connector 430 and electrically connected to the connector 430, and the middle frame 300 is disposed on a side of the connector 430 far from the second circuit board 510 to cooperate with the second circuit board 510 to clamp the fixing connector 430.

It should be noted that the terms "first" and "second" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Further, one end of the first circuit board 420 is electrically connected to the module body 410, and the other end is electrically connected to the connector 430, so as to connect the module body 410 and the second circuit board 510, and further conduct the fingerprint information acquired by the module body 410 to the second circuit board 510 for fingerprint identification.

It is understood that the second circuit board 510 may be a main board of the electronic device 10, on which related programs of fingerprint identification are integrated, and related technical features of fingerprint identification are within the understanding range of those skilled in the art and will not be described in detail herein.

In some embodiments of the present application, please continue to refer to fig. 3 and 4, the middle frame 300 includes a side frame 310 and a substrate 320, the substrate 320 and the side frame 310 are enclosed to form a front cavity 301 and a rear cavity 302, which are oppositely disposed, the second circuit board 510 is accommodated in the front cavity 301, and the module body 410 is disposed on a side of the substrate 320 close to the rear cavity 302.

Specifically, the front case 100, the side frame 310, and the substrate 320 collectively enclose a front cavity 301, and the rear case 200, the side frame 310, and the substrate 320 collectively enclose a rear cavity 302. In other words, the substrate 320 partitions the accommodating space 101 to form the front cavity 301 and the rear cavity 302. It can be understood that the front cavity 301 is a side of the electronic device 10 facing the user, the rear cavity 302 is a side of the electronic device 10 facing away from the user, and the module body 410 is disposed on a side of the substrate 320 close to the rear cavity 302 and penetrates through the fingerprint hole 210 so as to facilitate the user to perform fingerprint identification operation.

Further, a through hole 311 is formed on the substrate 320, and the first circuit board 420 is disposed through the through hole 311 to connect the module body 410 and the connector 430. It should be noted that, in the embodiment of the present application, the fingerprint module 400 is configured in a post fingerprint identification manner. The second circuit board 510 is disposed in the front cavity 301, and the module body 410 is disposed on a side of the substrate 320 close to the rear cavity 302, so that the first circuit board 420 passes through the module body 410 and the second circuit board 510 by forming a through hole 311 on the substrate 320. Of course, in some other embodiments, the fingerprint module 400 may also be disposed in a manner of pre-fingerprint identification, and the embodiment of the present application is not limited thereto.

In some embodiments of the present application, referring to fig. 5 in combination, fig. 5 is a partial sectional view taken along a-a of fig. 3, and the connector 430 includes a male socket 431 and a female socket 432. The female socket 432 is fixedly disposed on the second circuit board 510 and electrically connected to the second circuit board 510, and the male socket 431 is electrically connected to the first circuit board 420. In other words, the female socket 432 may be soldered to the second circuit board 510 at a side close to the middle frame substrate 320, so as to electrically connect the female socket 432 and the second circuit board 510. The male socket 431 is electrically connected to the module body 410 through the first circuit board 420. Therefore, when the male socket 431 and the female socket 432 are plugged together, the module body 410 and the second circuit board 510 can be conducted.

Specifically, the connector 430 is disposed between the substrate 320 and the second circuit board 510, and the substrate 320 and the second circuit board 510 are fixedly connected to clamp the fixed connector 430. It can be understood that the substrate 320 and the second circuit board 510 can be fixedly connected by screws, bolts, and fasteners.

In the embodiment of the present application, the substrate 320 and the second circuit board 510 are fixedly connected by a screw connection and fixation method. Of course, in other embodiments, other fixing connection methods may be adopted to connect the substrate 320 and the second circuit board 510. It should be understood that the fixing connection manner for clamping the fixing connector 430 between the substrate 320 and the second circuit board 510 is within the scope of the present embodiment.

Further, referring to fig. 6, fig. 6 is a schematic structural diagram illustrating a connection between the substrate 320 and the second circuit board 510 according to some embodiments of the present application. The base plate 320 is provided with at least one first screw hole 322, and the second circuit board 510 is provided with at least one second screw hole 512, it can be understood that the first screw holes 322 and the second screw holes 512 are arranged in a one-to-one correspondence, so that the base plate 320 and the second circuit board 510 are fixed by connecting the first screw holes 322 and the second screw holes 512 through screws.

In the embodiment of the present application, two first screw holes 322 and two second screw holes 512 are respectively disposed on two opposite sides of the connector 400, so as to clamp the connector 400 and apply a uniform clamping force to the connector 400 while the substrate 320 and the second circuit board 510 are stably and fixedly connected, thereby preventing the connector 400 from being damaged due to uneven force application. Of course, in other embodiments, the first screw hole 322 and the second screw hole 512 may be respectively provided in plural, and it is also satisfied that each first screw hole 322 is correspondingly provided with at least one second screw hole 512. As used herein, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The fixed subassembly that this application embodiment provided, the center structure through the electronic equipment of using this fixed subassembly itself to and the second circuit board of cooperation electronic equipment, electronic equipment's mainboard promptly, the connector of the fixed fingerprint module of centre gripping avoids addding the connector that other structural component fixed the fingerprint module, when reducing electronic equipment cost, can also promote the assembly efficiency of complete machine.

In some other embodiments of the present application, please refer to fig. 7, and fig. 7 is a partial structural schematic view of a fixing assembly 500 in other embodiments of the present application. The first recess 325 is formed on a side of the substrate 320 close to the connector 430, and the first recess 325 is adapted to the connector 430, so that when the substrate 320 and the second circuit board 510 clamp and fix the connector 430, the connector 430 is partially accommodated in the first recess 325.

Specifically, the first recess 325 opens toward the connector 430, and the male receptacle 431 of the connector 430 is partially received in the first recess 325. When the substrate 320 and the second circuit board 510 clamp and fix the connector 430, the male socket 431 of the connector 430 abuts against the bottom wall of the first recess 325. In the embodiment of the present application, the first groove 325 is formed in the substrate 320, and the male socket 431 of the connector 430 is partially accommodated in the first groove 325, so that the male socket 431 is prevented from being displaced when the electronic device is used, and the male socket 431 and the female socket 432 are dislocated to cause fingerprint misrecognition or damage to the electronic device.

Further, referring to fig. 8, fig. 8 is a partial structural schematic view of a fixing element 500 according to another embodiment of the present application. A second groove 515 is formed on a side of the second circuit board 510 close to the connector 430, and the second groove 515 is adapted to the connector, so that when the substrate 320 and the second circuit board 510 clamp and fix the connector 430, the connector 430 is partially accommodated in the second groove 515.

Specifically, the second groove 515 opens toward the connector 430, and the female socket 432 of the connector 430 is partially received in the second groove 515. When the substrate 320 and the second circuit board 510 clamp the fixed connector 430, the female socket 432 of the connector 430 abuts against the bottom wall of the second groove 515. In the embodiment of the present application, the second groove 515 is formed in the substrate 320, and the female socket 432 of the connector 430 is partially accommodated in the second groove 515, so that the female socket 432 is prevented from being displaced due to falling of the electronic device during use, and the male socket 431 and the female socket 432 are dislocated, thereby causing fingerprint misrecognition or damaging the electronic device.

Further, the embodiment of the present application limits the position of the connector 430 by the first groove 325 and the second groove 515. Specifically, the first groove 325 and the second groove 515 are matched to limit the connector 430 in six degrees of freedom in an all-around manner, so that the influence on the fingerprint identification effect caused by the shaking of the connector 430 due to external factors is avoided. For example, the first groove 325 may confine the male seat 431 in a planar direction parallel to the base plate 320, and the bottom wall of the first groove 325 may confine the male seat 431 in a direction perpendicular to the base plate 320. Similarly, the second groove 515 may limit the female socket 432 in a direction parallel to the plane of the second circuit board 510, and the bottom wall of the second groove 515 may limit the female socket 432 in a direction perpendicular to the second circuit board 510. Further, the male socket 431 and the female socket 432 are plugged together to realize electrical connection, and under the cooperation of the first groove 325 and the second groove 515, the connection between the male socket 431 and the female socket 432 is more stable.

It should be understood that all directional indications (such as up, down, left, right, front, rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, etc. in a certain posture (as shown in the drawings), and if the certain posture is changed, the directional indication is changed accordingly.

In some other embodiments of the present application, please refer to fig. 9, and fig. 9 is a partial structural schematic view of a fixing assembly 500 in other embodiments of the present application. The fixing assembly 500 further includes a buffer 520, wherein the buffer 520 is accommodated in the first recess 325 and abuts against the bottom wall of the first recess 325.

Specifically, the buffer 520 may be attached to the bottom wall of the first groove 325 by an Adhesive for fixing, for example, one of a double-sided tape, an OCA optical Adhesive (OCA), and an Optical Clear Resin (OCR) may be used to adhere and fix the buffer 520 and the bottom wall of the first groove 325.

Of course, in other embodiments, other manners may also be adopted to fixedly connect the buffering member 520 and the first groove 325, and the fixing manner of the buffering member and the first groove is not particularly limited in the embodiments of the present application.

Further, the buffer 520 is disposed between the substrate 320 and the male seat 431, and the buffer 520 can effectively absorb the impact from the internal or external pressure of the whole device, so as to prevent the impact from affecting the stability of the connector 430, and further improve the stability of the fingerprint identification of the whole device.

Further, the buffer 520 may be made of a flexible material with certain elasticity, such as one or more of foam, and the like. Of course, in other embodiments, the buffer 520 may be made of plastic material.

It is understood that the buffer 520 has a thickness h1 in the direction perpendicular to the substrate 320, and the first groove 325 has a depth h2 in the direction perpendicular to the substrate 320, and the thickness h1 should not exceed the depth h2 in order not to affect the stability of the connector 430.

The fixed subassembly that this application embodiment provided, through the connector of the fixed fingerprint module of center cooperation second circuit board centre gripping, avoid addding the connector that other structural component fixed the fingerprint module, when reducing the electronic equipment cost, can also promote the assembly efficiency of complete machine.

In addition, this application embodiment still provides an electronic equipment, this electronic equipment include preceding shell, backshell, aforementioned embodiment the fixed subassembly of fingerprint module and fingerprint module thereof, wherein, preceding shell, backshell and fixed subassembly's center enclose to establish and form the accommodation space, and the second circuit board holds and sets up in the accommodation space, and the module body is worn to locate the backshell in order to be used for the touch. It should be noted that, for the detailed structures of the electronic device and the fixing component, please refer to the related description of the foregoing embodiments, which is not repeated herein.

The electronic equipment that this application embodiment provided forms fixed subassembly through the center that utilizes electronic equipment itself and second circuit board (being electronic equipment's mainboard), and then the connector of the fixed fingerprint module of centre gripping avoids additionally increasing structural component in order to fix the connector, and occupies the inside space of electronic equipment to influence the structural layout of electronic equipment inner space, also can cause the rising of complete machine cost simultaneously.

It is noted that the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. The utility model provides a fixed subassembly of fingerprint module, the fingerprint module includes module body, first circuit board and connector, its characterized in that, fixed subassembly includes:

the second circuit board is used for bearing the connector and electrically connected with the connector;

the middle frame is arranged on one side of the connector, which is far away from the second circuit board, so that the middle frame is matched with the second circuit board to clamp and fix the connector;

one end of the first circuit board is electrically connected with the module body, and the other end of the first circuit board is electrically connected with the connector so as to conduct the module body and the second circuit board.

2. The fastening assembly of claim 1, wherein the connector comprises a male socket and a female socket, the male socket and the female socket are connected with each other, the female socket is fixed on the second circuit board and electrically connected with the second circuit board, and the male socket is electrically connected with the first circuit board.

3. The fixing assembly according to claim 1, wherein the middle frame comprises a side frame and a base plate, the base plate and the side frame are arranged in an enclosing manner to form a front cavity and a rear cavity which are oppositely arranged, the second circuit board is accommodated in the front cavity, and the module body is arranged on one side of the base plate close to the rear cavity.

4. The fixing assembly as claimed in claim 3, wherein the substrate has a through hole, and the first circuit board is disposed through the through hole to connect the module body and the connector.

5. The securing assembly of claim 3, wherein the connector is disposed between the substrate and the second circuit board, the substrate and the second circuit board being fixedly connected to clamp the connector.

6. The fixing assembly according to claim 5, wherein the base plate has at least one first screw hole, the second circuit board has at least one second screw hole, the first screw holes and the second screw holes are disposed in a one-to-one correspondence, and the base plate and the second circuit board are fixed by connecting the first screw holes and the second screw holes with screws.

7. The securing assembly of claim 5, wherein a first recess is defined in a side of the substrate adjacent to the connector, the first recess being adapted to the connector such that the connector is partially received in the first recess when the substrate and the second circuit board clamp the connector.

8. The fixing assembly of claim 7, wherein a second groove is formed on a side of the second circuit board close to the connector, the second groove being adapted to the connector, so that when the substrate and the second circuit board clamp and fix the connector, the first groove and the second groove cooperate to limit the connector.

9. The fixing assembly according to claim 8, further comprising a buffer member, wherein the buffer member is accommodated in the first groove and abuts against a bottom wall of the first groove.

10. An electronic device, comprising a front case, a rear case, a fingerprint module of any one of claims 1-9, and a fixing component of the fingerprint module,

the front shell, the rear shell and the middle frame are surrounded to form an accommodating space, the second circuit board is accommodated in the accommodating space, and the module body penetrates through the rear shell to be used for touching.