Circuit board assembly and electronic device

Abstract

The present application provides a circuit board assembly and an electronic device. The circuit board assembly comprises: a circuit board on which a first board-to-board connector and a second board-to-board connector are mounted; a first support mounted on the circuit board, located on the side of the first board-to-board connector away from the circuit board, used for fixing the first board-to-board connector, and provided with a relief hole; a second support mounted on the circuit board, located on the side of the second board-to-board connector away from the circuit board, used for fixing the second board-to-board connector, and disposed adjacent to the first support, the second support having a tongue, and the tongue being located on the side of the second support facing the first support; and a fixing member connected to the circuit board and provided with an insertion groove, the insertion groove extending out of the relief hole, and at least part of the tongue being inserted into the insertion groove.

Description

TECHNICAL FIELD

[0002] This application relates to the field of electronic device technologies, andin particular, to a circuit board assembly and an electronic device.BACKGROUND

[0003] At present, electronic devices have been developing toward being lightand thin and integrating more and more functions inside. As a result, a space formounting functional devices that implement various functions becomes increasinglysmall. For example, a circuit board of a camera module in a mobile phone isconnected to a mainboard of the electronic device by typically using aboard-to-board connector, while the board-to-board connector needs to be fastenedto the mainboard with screws.

[0004] However, with an increasing number of board-to-board connectors inelectronic devices, the way of fastening with screws leads to many screw holes in thecircuit board, while arrangement of the screw holes affects the trace layout.Guarantee of trace layout for important chips on the mainboard results in insecureconnection between the board-to-board connectors and the circuit board.SUMMARY

[0005] Embodiments of this application provides a circuit board assembly and anelectronic device, which can resolve the problem of insecure connection between aboard-to-board connector and a circuit board.

[0006] To resolve the foregoing technical problem, this application isimplemented as follows:

[0007] According to a first aspect, an embodiment of this application provides acircuit board assembly, including:a circuit board to which a first board-to-board connector and a secondboard-to-board connector are mounted;a first bracket, where the first bracket is mounted on the circuit board, thefirst bracket is located on a side of the first board-to-board connector away from thecircuit board, the first bracket is configured to fasten the first board-to-boardconnector, and the first bracket is provided with an escape hole;a second bracket, where the second bracket is mounted on the circuitboard, the second bracket is located on a side of the second board-to-board connectoraway from the circuit board, the second bracket is configured to fasten the secondboard-to-board connector, the second bracket is disposed neighboring to the firstbracket, and the second bracket is provided with a tongue insert, the tongue insertbeing located on a side of the second bracket facing toward the first bracket; anda fixing member, where the fixing member is connected to the circuitboard and the fixing member is provided with a slot, the slot extending out from theescape hole and at least part of the tongue insert being inserted into the slot.

[0008] According to a second aspect, an embodiment of this application furtherprovides an electronic device, including the foregoing circuit board assembly, wherethe circuit board is a mainboard of the electronic device.

[0009] In embodiments of this application, for a neighboring area of the firstbracket and the second bracket, the fixing member is used to fasten the first bracketand the second bracket to the circuit board, which can improve firmness of theconnection of the neighboring area of the first bracket and the second bracket to thecircuit board. In addition, as fewer screw connection structures are used, the fewerscrew mounting holes can be provided in the circuit board, improving utilization ofthe circuit board.BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG. 1 is an exploded view of a circuit board assembly according to anembodiment of this application;

[0011] FIG. 2 is a cross-sectional diagram of a circuit board assembly accordingto an embodiment of this application;

[0012] FIG. 3 is a three-dimensional diagram of a fixing member according to anembodiment of this application;

[0013] FIG. 4 is a schematic structural diagram of a circuit board assemblyaccording to an embodiment of this application;

[0014] FIG. 5 is a local enlarged view of area A in FIG. 4;

[0015] FIG. 6 is a schematic structural diagram of a first bracket according to anembodiment of this application;

[0016] FIG. 7 is a local enlarged view of area B in FIG. 6; and

[0017] FIG. 8 is a schematic structural diagram of a second bracket according toan embodiment of this application.DESCRIPTION OF EMBODIMENTS

[0018] The following clearly and completely describes the technical solutions inthe embodiments of this application with reference to the accompanying drawings inthe embodiments of this application. Apparently, the described embodiments aresome but not all of the embodiments of this application. All other embodimentsobtained by a person of ordinary skill in the art based on the embodiments of thisapplication without creative efforts shall fall within the protection scope of thisapplication.

[0019] In the specification and the claims of this application, the terms "first","second", and so on are intended to distinguish between different objects but do notdescribe a specific order or sequence. It should be understood that data used in thisway is used interchangeably in appropriate circumstances so that the embodiments ofthis application can be implemented in other orders than the order illustrated ordescribed herein. In addition, in this specification and claims, "and / or" represents atleast one of the objects connected, and the symbol " / " generally represents an "or"relationship between the associated objects.

[0020] As shown in FIG. 1 and FIG. 2, an embodiment of this applicationprovides a circuit board assembly, including:a circuit board 10 to which a first board-to-board connector 11 and asecond board-to-board connector 12 are mounted;a first bracket 20, where the first bracket 20 is mounted on the circuitboard 10, the first bracket 20 is located on a side of the first board-to-boardconnector 11 away from the circuit board 10, the first bracket 20 is configured tofasten the first board-to-board connector 11, and the first bracket 20 is provided withan escape hole 21;a second bracket 30, where the second bracket 30 is mounted on thecircuit board 10, the second bracket 30 is located on a side of the secondboard-to-board connector 12 away from the circuit board 10, the second bracket 30is configured to fasten the second board-to-board connector 12, the second bracket30 is disposed neighboring to the first bracket 20, and the second bracket 30 isprovided with a tongue insert 31, the tongue insert 31 being located on a side of thesecond bracket 30 facing toward the first bracket 20; anda fixing member 40, where the fixing member 40 is connected to thecircuit board 10 and the fixing member 40 is provided with a slot 41, the slot 41extending out from the escape hole 21 and at least part of the tongue insert 31 beinginserted into the slot 41.

[0021] In this implementation, for the board-to-board connectors mounted on thecircuit board 10, as each of the board-to-board connectors corresponds to a differentfunctional component, the board-to-board connectors are mounted onto the circuitboard 10 in chronological order. Therefore, a board-to-board connector that needs tobe installed earlier may be set as the first board-to-board connector 11, and aboard-to-board connector that needs to be installed later may be set as the secondboard-to-board connector 12, and then the first bracket 20 and the second bracket 30are used to fasten the first board-to-board connector 11 and the secondboard-to-board connector 12 respectively.

[0022] The first bracket 20 and the second bracket 30 may be fastened on thecircuit board 10 with screws, so as to fasten the first board-to-board connector 11and the second board-to-board connector 12, ensuring stability of connection of thefirst board-to-board connector 11 and the second board-to-board connector 12 to thecircuit board 10.

[0023] In addition, for a neighboring area of the first bracket 20 and the secondbracket 30, the fixing member 40 is used to fasten the first bracket 20 and the secondbracket 30 to the circuit board 10, which can improve firmness of the connection ofthe neighboring area of the first bracket 20 and the second bracket 30 to the circuitboard 10. In addition, as fewer screw connection structures are used, fewer screwmounting holes can be provided in the circuit board 10, improving utilization of thecircuit board 10.

[0024] The fixing member 40 is provided with the slot 41, and the escape hole21 is provided on a side of the first bracket 20 neighboring to the second bracket 30,so that the slot 41 can extend out from the escape hole 21. The tongue insert 31 maybe disposed on a side of the second bracket 30 neighboring to the first bracket 20 andat least part of the tongue insert 31 can be inserted into the slot 41, and throughcooperation of the slot 41 and the tongue insert 31, the escape hole 40 is snap-fittedwith the second bracket 30. As the tongue insert extends out from the escape hole 21,the first bracket 20 can be fastened as well. Thus, the fixing member 40 fastens thefirst bracket 20 and the second bracket 30 on the circuit board.

[0025] It can be seen that the circuit board assembly according to theembodiment of this application can not only provide firm and reliable connectionbetween board-to-board connectors and the circuit board, but also have a simple andcompact structure, occupying a small space.

[0026] Optionally, as shown in FIG. 3, the fixing member 40 includes a baseplate 42 and a clip hook 43, where the base plate 42 is connected to the circuit board10, the clip hook 43 is disposed on a side of the base plate 42 away from the circuitboard 10, and the slot 41 is formed between the clip hook 43 and the base plate 42.

[0027] In this implementation, the slot 41 is formed through the provision of theclip hook 43, such that the tongue insert 31 can be inserted into the slot 41 andsnap-fitted with the clip hook 43, enabling the fixing member 40 to fasten the firstbracket 20 and the second bracket 30.

[0028] The clip hook 43 includes a connecting plate 431 and a fixing plate 432,where the connecting plate 431 is connected to the base plate 42, the connectingplate 431 extends away from the circuit board 10, the fixing plate 432 is connectedto an end of the connecting plate 431 away from the circuit board 10, and the fixingplate 432 extends toward the tongue insert 31, so as to form the slot 41 between thebase plate 42, the connecting plate 431, and the fixing plate 432.

[0029] In this way, the tongue insert 31 is inserted into the slot 41 so as to besnap-fitted with the fixing plate 432, enabling the fixing member 40 to fasten thefirst bracket 20 and the second bracket 30. In addition, to make it easy to insert thetongue insert 31 into the slot 41, a guiding face may be provided at an inserting endof the tongue insert 31, or a guiding face may be provided on a side of the fixingplate 432 facing toward the base plate 42.

[0030] Further, the fixing plate 432 may extend away from the circuit board 10,so that an opening size of the slot 41 is gradually reduced in a direction approachingthe connecting plate 431, making it easy to insert the tongue insert 31 into the slot 41.In addition, because the opening size of the slot 41 is gradually reduced in thedirection approaching the connecting plate 431, the connection between the tongueinsert 31 and the slot 41 is more reliable and more secure when the tongue insert 31is completely inserted into the slot 41.

[0031] As shown in FIG. 4 and FIG. 5, the circuit board 10 is provided with amounting hole 13, a connecting pin 44 is provided on a side of the base plate 42facing toward the circuit board 10, and the connecting pin 44 is mounted inside themounting hole 13, so as to fasten the fixing member 40 on the circuit board 10.

[0032] The connecting pin 44 may be connected to the circuit board 10 bywelding. Specifically, the connecting pin 44 may extend into the mounting hole 13and be soldered with solder paste to ensure a strong tensile strength between thefixing member 40 and the circuit board 10, increasing structural reliability of thecircuit board assembly.

[0033] Optionally, the mounting hole 13 may be a strip-shaped hole and a lengthdirection of the mounting hole 13 extends along a trace outgoing direction of aprocessor (not shown in the figure) on the circuit board 10, so that a wiring spaceoccupied by the mounting hole 13 in the circuit board 10 is reduced, furtherimproving utilization of the circuit board 10.

[0034] The mounting hole 13 is 0.4 mm-0.6 mm in width and 1.2 mm-1.8 mmin length, which can effectively reduce the space occupied by the mounting hole 13on the circuit board 10 as compared with a screw hole with a diameter of 1.6 mm inthe circuit board 10.

[0035] In a specific implementation of this application, the mounting hole 13may be designed as a rectangular hole 1.5 mm long and 0.5 mm wide, so as toreduce the space occupied by the mounting hole 13 in the circuit board 10.

[0036] Optionally, as shown in FIG. 6 and FIG. 7, the first bracket 20 is providedwith a sunken portion 22, where the sunken portion 22 faces toward the circuit board10, the sunken portion 22 is located between the escape hole 21 and a body structureof the second bracket 20, and the sunken portion 22 abuts against a side of thetongue insert 31 facing toward the circuit board 10.

[0037] In this implementation, the first bracket 20 is provided with the sunkenportion 22 such that the escape hole 21 for extending of the slot 41 is formed in thefirst bracket 20, and the sunken portion 22 is located between the tongue insert 31and the base plate 42. In this way, the fixing member 40 can also function to fastenthe first bracket 20, achieving the purpose of using the fixing member 40 to fastenthe first bracket 20 and the second bracket 30.

[0038] In addition, the provision of the sunken portion 22 allows the forming ofthe escape hole 21 for extending of the slot 41, reducing the size of the fixingmember 40 in a thickness direction of the circuit board, thereby achieving thepurpose of easy spatial layout and weight reduction.

[0039] In this way, in a position in which the fixing member 40 is located, thesunken portion 22 and tongue insert 31 are stacked on the base plate 42 in sequenceand the tongue insert 31 is snap-fitted with the slot 41, so as to fasten the firstbracket 20 and the second bracket 30 using the fixing member 40, which alsoimproves reliability of the connection of the neighboring area of the first bracket 20and the second bracket 30 to the circuit board 10.

[0040] Optionally, as shown in FIG. 8, the second bracket 30 is provided with atransition portion 32 connecting to the tongue insert 31, where the transition portion32 extends, in a direction facing toward the tongue insert 31, toward the circuit board

[0041] In this implementation, the transition portion 32 extending, in thedirection facing the tongue insert 31, toward the circuit board 10 can reduce the sizeof the fixing member 40 in the thickness direction of the circuit board, so as toachieve the purpose of easy space layout and weight reduction.

[0042] As shown in FIG. 4, the first board-to-board connector 11 may beprovided in plurality, and the plurality of first board-to-board connectors 11 may bearranged along a first direction; and the second board-to-board connector 12 mayalso be provided in plurality and the plurality of second board-to-board connectors12 may be arranged along a second direction, where an included angle between thefirst direction and the second direction is greater than 0º, and one firstboard-to-board connector 11 and one second board-to-board connector 12 are locatedrespectively on two opposite sides of the fixing member 40.

[0043] Thus, with one first board-to-board connector 11 and one secondboard-to-board connector 12 disposed on each of the two opposite sides of the fixingmember 40, the mixing member 40 fastens the two board-to-board connectors,improving fastening efficiency of the fixing member 40. In addition, this alsoreduces use of screw connection structures and therefore reduces screw mountingholes provided in the circuit board 10, improving utilization of the circuit board 10.

[0044] Optionally, the included angle between the first direction and the seconddirection may be 90º, such that the first board-to-board connector 11 and the secondboard-to-board connector 12 can be better arranged on the circuit board 10.

[0045] The second board-to-board connector 12 includes a fingerprint moduleboard-to-board connector, so that the finger module board-to-board connector can bebetter mounted on the circuit board 10.

[0046] Both the first bracket 20 and the second bracket 30 are provided with ascrew hole, and the circuit board 10 is also provided with through-holes fitting thescrew holes, such that the first bracket 20 and the second bracket 30 can be mountedon the circuit board 10 with screws. In addition, in the neighboring area of the firstbracket 20 and the second bracket 30, the fixing member 40 is used to fasten the firstbracket 20 and the second bracket 30 to the circuit board 10.

[0047] An embodiment of this application further provides an electronic device,including the foregoing circuit board assembly, where the circuit board is amainboard of the electronic device. It should be note that the implementations of theembodiment of the circuit board assembly are also applicable to the embodiment ofthe electronic device, with the same technical effects achieved. Details are notdescribed herein again.

[0048] It should be noted that, in this specification, the terms "include","comprise", or any of their variants are intended to cover a non-exclusive inclusion,such that a process, method, article, or apparatus that includes a series of elementsnot only includes those elements but also includes other elements that are notexpressly listed, or further includes elements inherent to such process, method,article, or apparatus. In the absence of more restrictions, an element defined by"including a…" does not exclude the presence of another same element in a process,method, article, or apparatus that includes that element.

[0049] Embodiments of this application have been described above withreference to the accompanying drawings. However, this application is not limited tothese specific embodiments. The foregoing specific embodiments are merelyillustrative rather than restrictive. As inspired by this application, a person ofordinary skill in the art may develop many other forms that are not departing fromthe principle of this application and the protection scope of the claims, and all suchforms fall within the protection scope of this application.

Claims

1. A circuit board assembly, comprising: a circuit board to which a first board-to-board connector and a second board-to-board connector are mounted; a first bracket, wherein the first bracket is mounted on the circuit board, the first bracket is located on a side of the first board-to-board connector away from the circuit board, the first bracket is configured to fasten the first board-to-board connector, and the first bracket is provided with an escape hole; a second bracket, wherein the second bracket is mounted on the circuit board, the second bracket is located on a side of the second board-to-board connector away from the circuit board, the second bracket is configured to fasten the second board-to-board connector, the second bracket is disposed neighboring to the first bracket, and the second bracket is provided with a tongue insert, the tongue insert being located on a side of the second bracket facing toward the first bracket; and a fixing member, wherein the fixing member is connected to the circuit board and the fixing member is provided with a slot, the slot extending out from the escape hole and at least part of the tongue insert being inserted into the slot.

2. The circuit board assembly according to claim 1, wherein the fixing member comprises a base plate and a clip hook, the base plate being connected to the circuit board, the clip hook being disposed on a side of the base plate away from the circuit board, and the slot being formed between the clip hook and the base plate.

3. The circuit board assembly according to claim 2, wherein the circuit board is provided with a mounting hole, a connecting pin is provided on a side of the base plate facing toward the circuit board, and the connecting pin is mounted inside the mounting hole, so as to mount the fixing member on the circuit board.

4. The circuit board assembly according to claim 3, wherein the connecting pin is joined to the circuit board by welding.

5. The circuit board assembly according to claim 3, wherein the mounting hole is a strip-shaped hole and a length direction of the mounting hole extends along a trace outgoing direction of a processor on the circuit board.

6. The circuit board assembly according to claim 2, wherein the clip hook comprises a connecting plate and a fixing plate, the connecting plate being connected to the base plate, the connecting plate extending away from the circuit board, the fixing plate being connected to an end of the connecting plate away from the circuit board, and the fixing plate extending toward the tongue insert, so as to form the slot between the base plate, the connecting plate, and the fixing plate.

7. The circuit board assembly according to claim 6, wherein the fixing plate extends away from the circuit board, so that an opening size of the slot is gradually reduced in a direction approaching the connecting plate.

8. The circuit board assembly according to claim 1, wherein the second bracket is provided with a transition portion connecting to the tongue insert, the transition portion extending, in a direction facing the tongue insert, toward the circuit board.

9. The circuit board assembly according to claim 1, wherein the first bracket is provided with a sunken portion, the sunken portion facing toward the circuit board, the sunken portion being located between the escape hole and the second bracket, and the sunken portion abutting against a side of the tongue insert facing toward the circuit board.

10. The circuit board assembly according to claim 1, wherein the first board-to-board connector is provided in plurality, and the plurality of first board-to-board connectors are arranged along a first direction; the second board-to-board connector is provided in plurality, and the plurality of second board-to-board connectors are arranged along a second direction; and an included angle between the first direction and the second direction is greater than 0°, wherein one of the first board-to-board connectors and one of the second board-to-board connectors are respectively located on two opposite sides of the fixing portion.

11. An electronic device, comprising the circuit board assembly according to any one of claims 1 to 10, wherein the circuit board is a mainboard of the electronic device.