CN213783702U

CN213783702U - Circuit board assembly and electronic equipment

Info

Publication number: CN213783702U
Application number: CN202023118574.9U
Authority: CN
Inventors: 刘洛尘; 钱红波
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-07-23
Anticipated expiration: 2030-12-22

Abstract

The application discloses circuit board assembly and electronic equipment, circuit board assembly include circuit board, electronic component, first flexible circuit board and second flexible circuit board. The electronic component is disposed at a distance from the circuit board in a thickness direction of the circuit board. The first end of the first flexible circuit board is electrically connected with the electronic element. The first end of the second flexible circuit board is electrically connected with the circuit board. The second end of the second flexible circuit board and the circuit board are arranged at intervals in the thickness direction. The second end of the second flexible circuit board is electrically connected with the second end of the first flexible circuit board. The application provides a circuit board subassembly and electronic equipment can improve the stability of being connected of electronic component and circuit board and improve the flexibility ratio that electronic component and circuit board set up in the space.

Description

Circuit board assembly and electronic equipment

Technical Field

The application relates to the technical field of electronics, concretely relates to circuit board assembly and electronic equipment.

Background

With the increase of functions of electronic equipment, the arrangement position of an electronic element in the electronic equipment is not limited on a circuit board, the electronic element is connected with the circuit board through a flexible circuit board, the length and the extension direction of the flexible circuit board limit the relative position of the electronic element and the circuit board in space, and how to improve the connection stability of the electronic element and the circuit board and the flexibility of arrangement of the electronic element and the circuit board in space becomes a technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The application provides a circuit board assembly and electronic equipment that improve the stability of being connected of electronic component and circuit board and improve the flexibility ratio that electronic component and circuit board set up in the space.

In a first aspect, an embodiment of the present application provides a circuit board assembly, including:

a circuit board;

an electronic component disposed at a distance from the circuit board in a thickness direction of the circuit board;

the first end of the first flexible circuit board is electrically connected with the electronic element; and

the first end of the second flexible circuit board is electrically connected with the circuit board, the second end of the second flexible circuit board and the circuit board are arranged at intervals in the thickness direction, and the second end of the second flexible circuit board is electrically connected with the second end of the first flexible circuit board.

In a second aspect, an embodiment of the present application provides an electronic device, including the circuit board assembly.

According to the circuit board assembly provided by the embodiment of the application, the first flexible circuit board and the second flexible circuit board which are electrically connected are arranged and electrically connected between the electronic element and the circuit board, so that the electronic element and the circuit board which are arranged at intervals in the thickness direction are electrically connected, at least part of the second flexible circuit board extends along the thickness direction, so that the second end of the second flexible circuit board is spaced from the circuit board in the thickness direction, the second flexible circuit board is the second flexible circuit board, and the arrangement of the second flexible circuit board can ensure that the length of the first flexible circuit board is relatively small, so that the connection stability of the electronic element and the circuit board is improved, and the flexibility of the electronic element and the circuit board in space is improved; meanwhile, the path of the first flexible circuit board can be optimized, so that the layout of devices in the electronic equipment is optimized, and the connection reliability between the electronic element and the circuit board is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described 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 structural diagram of an electronic device according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a first cross-sectional configuration of FIG. 1 taken along line A-A;

fig. 3 is a schematic partial structure diagram of a circuit board assembly provided by an embodiment of the present application at a first viewing angle;

FIG. 4 is an exploded view of the circuit board assembly of FIG. 3 from one perspective;

FIG. 5 is an enlarged schematic view of the base of FIG. 4;

FIG. 6 is a schematic diagram of the circuit board assembly of FIG. 3 in a second perspective;

FIG. 7 is an exploded view of the circuit board assembly of FIG. 3 from another perspective;

FIG. 8 is an exploded view of the circuit board assembly of FIG. 3 from yet another perspective;

FIG. 9 is an enlarged schematic view of the raised portion of FIG. 8;

FIG. 10 is a schematic view of a second cross-sectional configuration taken along line A-A of FIG. 1;

fig. 11 is a schematic view of a third cross-sectional structure taken along line a-a of fig. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in the present application may be appropriately combined with each other.

Referring to fig. 1, an embodiment of the present application provides a circuit board assembly and an electronic apparatus 100 for improving connection stability between an electronic component and a circuit board and improving flexibility of the electronic component and the circuit board in space. The electronic device 100 includes, but is not limited to, a mobile phone, a telephone, a television, a tablet computer, a mobile phone, a camera, a Personal computer, a notebook computer, a vehicle-mounted device, a wearable device, a Personal Digital Assistant (PDA), an e-book reader, an MP3 (Moving Picture Experts Group Audio Layer III) player, an MP4 (Moving Picture Experts Group Audio Layer IV) player, a laptop portable computer, a desktop computer, a set-top box, and the like. The wearable device is a portable electronic device directly worn on the person or integrated into the clothing or accessories of the user, and includes, but is not limited to, a smart watch, a ring, a bracelet, a necklace, an earphone, glasses, a hair band, a helmet, a waist wearing piece, a wrist wearing piece, an arm wearing piece, an ankle wearing piece, and the like. The embodiment of the present application takes the electronic device 100 as an example of a smart watch.

Referring to fig. 2, the electronic device 100 includes a circuit board assembly 10. The circuit board assembly 10 provided in the present application is specifically illustrated below with reference to the accompanying drawings.

Referring to fig. 2, the circuit board assembly 10 includes a circuit board 1, an electronic component 2, a first flexible circuit board 3 and a second flexible circuit board 4.

Optionally, the circuit board 1 is a hard circuit board or a flexible circuit board. In this embodiment, the circuit board 1 is a hard circuit board. Further, the circuit board 1 is a main board. Of course, the circuit board 1 may also be a sub-board. Alternatively, the circuit board 1 may be a circuit board or an assembly formed by combining a plurality of circuit boards.

The electronic component 2 is disposed at an interval from the circuit board 1 in a thickness direction of the circuit board 1.

For convenience of description, the length direction of the circuit board 1 is defined as the Y-axis direction, the width direction of the circuit board 1 is defined as the X-axis direction, and the thickness direction of the circuit board 1 is defined as the Z-axis direction. Wherein the length dimension is greater than the width dimension. The direction in which the arrow points is the positive direction. When the circuit board assembly 10 is mounted in the electronic device 100, the longitudinal direction of the circuit board assembly 10 is also the longitudinal direction of the electronic device 100, the width direction of the circuit board assembly 10 is also the width direction of the electronic device 100, and the thickness direction of the circuit board assembly 10 is also the thickness direction of the electronic device 100, and the thickness direction may also be referred to as the height direction.

Optionally, referring to fig. 2, the electronic device 100 further includes a housing assembly 5 and a battery 6. The housing assembly 5 includes a display screen 51, a middle frame 52 and a rear cover 53. The display screen 51 is opposite to the rear cover 53 and is arranged at intervals. The middle frame 52 is enclosed between the display screen 51 and the rear cover 53, and forms an inner cavity for accommodating the circuit board assembly 10. The circuit board 1 is disposed between the display screen 51 and the rear cover 53. In this embodiment, the electronic component 2 is disposed on the rear cover 53. Thus, the electronic component 2 and the circuit board 1 are arranged at an interval in the thickness direction. Further, the battery 6 is disposed between the circuit board 1 and the rear cover 53. In other words, the battery 6 is provided between the electronic component 2 and the circuit board 1. Of course, in other embodiments, the electronic component 2 may be disposed on the display screen 51 or the middle frame 52, so that the electronic component 2 and the circuit board 1 are spaced apart in the thickness direction. Of course, in other embodiments, other devices may be disposed between the electronic component 2 and the circuit board 1, such as a small board, a camera, a receiver, a chip, and a flash.

The electronic component 2 is not specifically limited in the present application, and optionally, the electronic component 2 may be disposed below the display screen 51, and perform signal interaction with the outside through the display screen 51, and may also be disposed on the middle frame 52 or the rear cover 53, and perform signal interaction with the outside through the middle frame 52 or the rear cover 53. Electronic component 2 includes but is not limited to flash light, camera, receiver, antenna module, fingerprint identification module, face identification module, proximity sensor, ambient light sensor, blood oxygen detection sensor, heart rate detection sensor, blood pressure detection sensor etc..

In the embodiment, the electronic device 100 is an intelligent watch, the electronic element 2 is a heart rate detection sensor, and the electronic element 2 is disposed on the rear cover 53. When the electronic device 100 is worn on the wrist of the user, the back cover 53 of the electronic device 100 is attached to the wrist of the user, and the electronic element 2 is in contact with the skin of the user for heart rate detection.

Referring to fig. 2, the first end 31 of the first flexible circuit board 3 is electrically connected to the electronic component 2. The first end 31 of the first flexible circuit board 3 is electrically connected to the electronic component 2 by soldering, electrical connector, conductive adhesive, snap connection, or the like. The second end 32 of the first flexible circuit board 3 is electrically connected to the second end 42 of the second flexible circuit board 4. The second end 32 of the first flexible circuit board 3 is electrically connected to the second end 42 of the second flexible circuit board 4 by soldering, electrical connector, conductive adhesive, snap connection, or the like. In this embodiment, the conductive terminals of the second end 32 of the first flexible circuit board 3 and the second end 42 of the second flexible circuit board 4.

Referring to fig. 2, the first end 41 of the second flexible circuit board 4 is electrically connected to the circuit board 1, and the specific electrical connection manner includes, but is not limited to, conductive adhesive bonding, snap connection, board-to-board socket connection, soldering, and the like. In this embodiment, the first end 41 of the second flexible circuit board 4 is soldered to the circuit board 1 by thermocompression, so that the overlapping thickness of the first end 41 of the second flexible circuit board 4 and the circuit board 1 is small, the space in the thickness direction is saved, and devices such as the battery 6 are disposed, thereby reducing the overall thickness of the electronic device 100 and promoting the miniaturization development of the electronic device 100.

Referring to fig. 2, the second end 42 of the second flexible circuit board 4 and the circuit board 1 are spaced in the thickness direction. Specifically, at least a portion of the second flexible circuit board 4 extends in the thickness direction, so that the second end 42 of the second flexible circuit board 4 and the circuit board 1 are arranged at an interval in the thickness direction, and the transition in the thickness direction on the second flexible circuit board 4 is realized. The second end 42 of the second flexible circuit board 4 is electrically connected to the second end 32 of the first flexible circuit board 3. Specific electrical connection means include, but are not limited to, conductive adhesive bonding, snap-fit connection, board-to-board card socket connection, soldering, and the like. In this embodiment, the second end 42 of the second flexible circuit board 4 is electrically connected to the second end 32 of the first flexible circuit board 3 in a board-to-board socket connection manner, and the second end 42 of the second flexible circuit board 4 and the second end 32 of the first flexible circuit board 3 have a sufficient height space in the thickness direction, so that the board-to-board socket connection is conveniently arranged, and the board-to-board socket connection is convenient to install and detach and also has high connection strength.

When the height difference between the electronic component 2 and the circuit board 1 in the thickness direction, especially, the electrical connection between the first end 31 of the first flexible circuit board 3 electrically connected to the electronic component 2 and the circuit board 1 is in the length direction and has a distance in the width direction, the electronic component 2 and the circuit board 1 are directly electrically connected by arranging the first flexible circuit board 3, the required first flexible circuit board 3 is too long, the arrangement path of the first flexible circuit board 3 is complicated, the too long first flexible circuit board 3 is troublesome to fix, when the electronic device 100 falls and collides, the too long first flexible circuit board 3 is easy to loosen and affect other devices under the impact force, and further, the short circuit risk and the risk of winding other devices are brought.

In the circuit board assembly 10 provided in the embodiment of the present application, the first flexible circuit board 3 and the second flexible circuit board 4 electrically connected to each other are disposed between the electronic component 2 and the circuit board 1, so that the electronic component 2 and the circuit board 1 disposed at an interval in the thickness direction are electrically connected to each other, at least a portion of the second flexible circuit board 4 extends in the thickness direction, so that the second end 42 of the second flexible circuit board 4 is spaced from the circuit board 1 in the thickness direction, the second flexible circuit board 4 is the second flexible circuit board 4, and the second flexible circuit board 4 is disposed such that the length of the first flexible circuit board 3 is relatively small, so as to improve the connection stability between the electronic component 2 and the circuit board 1 and improve the flexibility of the electronic component 2 and the circuit board 1 disposed in space; meanwhile, the path of the first flexible circuit board 3 can be optimized, so that the layout of devices inside the electronic device 100 is optimized, and the connection reliability between the electronic element 2 and the circuit board 1 is further improved.

The present application does not specifically limit the distance between the second end 42 of the second flexible circuit board 4 and the circuit board 1, in other words, the present application does not specifically limit the height of the second end 42 of the second flexible circuit board 4 raised relative to the first end 41 of the second flexible circuit board 4, which is exemplified by the following embodiments.

In one embodiment, referring to fig. 2, the second end 42 of the second flexible circuit board 4 is disposed between the electronic component 2 and the circuit board 1 in the thickness direction.

Specifically, the second end 42 of the second flexible circuit board 4 is disposed between the height of the electronic component 2 and the height of the circuit board 1, so that the second end 32 of the first flexible circuit board 3 is lowered from the height of the electronic component 2 to the height of the second flexible circuit board 4, and compared with the first flexible circuit board 3 which is directly lowered from the height of the electronic component 2 to the height of the circuit board 1, the height spanned by the first flexible circuit board 3 is relatively small, so that the length of the first flexible circuit board 3 is relatively small, and the extending path of the first flexible circuit board 3 is relatively optimized.

This embodiment is through setting up first flexible circuit board 3 and second flexible circuit board 4 and all have certain span in the thickness direction to avoid single flexible circuit board too big in the span in the thickness direction, avoid single flexible circuit board's length overlength effectively, extend the complicated other device scheduling problems that easily disturb of route.

In another embodiment, the second end 42 of the second flexible circuit board 4 is disposed on the plane of the electronic component 2 in the thickness direction.

Specifically, the second flexible circuit board 4 is directly raised to the height of the electronic component 2 from the height of the circuit board 1, so that the first flexible circuit board 3 can extend in a plane without descending the height, and further the bending of the first flexible circuit board 3 is reduced, and the second flexible circuit board 4 can select a proper position to avoid other devices, so that the first flexible circuit board 3 is matched with the second flexible circuit board 4 to realize the connection of the electronic component 2 and the circuit board 1.

In a further embodiment, the second end 42 of the second flexible circuit board 4 is arranged on a side of the electronic component 2 facing away from the circuit board 1 in the thickness direction.

The manner in which the second end 42 of the second flexible circuit board 4 is raised is not particularly limited. The following is a detailed description of several embodiments.

In one embodiment, referring to fig. 2 and 3, the circuit board assembly 10 further includes a lifting bracket 7. The lifting support 7 is arranged on the circuit board 1 or adjacent to the circuit board 1. In this embodiment, the elevation support 7 is provided at the edge of the circuit board 1. Further, the elevating bracket 7 is disposed near the inner wall of the middle frame 52, so that the second flexible circuit board 4 and the first flexible circuit board 3 are disposed along the inner wall of the middle frame 52, and interference with other devices is reduced.

The elevation bracket 7 fixes the second end 42 of the second flexible circuit board 4 to elevate the second end 42 of the second flexible circuit board 4.

In another embodiment, the lifting support 7 is integrally formed with the middle frame 52, in other words, the lifting support 7 is disposed on the inner wall of the middle frame 52, and the lifting support 7 is used for fixing the second end 42 of the second flexible circuit board 4 to lift the second end 42 of the second flexible circuit board 4. In this embodiment, the raising support 7 and the middle frame 52 are integrally formed, the raising support 7 does not need to be formed separately, and can be formed in the same process with the middle frame 52, so that the manufacturing process and the processing cost of the raising support 7 are saved.

It can be understood that the raising bracket 7 can fix the second end 42 of the second flexible circuit board 4 by means of screw fixation, snap fixation, adhesive fixation, welding fixation, etc.

The structure of the elevating bracket 7 is not particularly limited in the present application, and is specifically described below by way of several embodiments.

Referring to fig. 3 and 4, the lifting frame 7 includes a base 71, at least one raised portion 72, and a pressing plate 73.

The base 71 is fixedly connected with the circuit board 1. Specifically, the base 71 is disposed outside the circuit board 1, and the base 71 is disposed on the circuit board 1 near a position where the second flexible circuit board 4 is electrically connected to the circuit board 1, so as to reduce the length of the second flexible circuit board 4. One end of the base 71 is connected to the circuit board 1 by soldering, screwing, gluing, or snap-fit connection. In this embodiment, one end of the base 71 is connected to the circuit board 1 by a screw.

Further, referring to fig. 3 and 4, a first positioning hole 711 is disposed on the base 71, a positioning post or a second positioning hole 11 adapted to the first positioning hole 711 is disposed on the circuit board 1, and the first positioning hole 711 is matched with the positioning post or the second positioning hole 11, so that the base 71 and the circuit board 1 are positioned, and can be screwed more quickly.

Referring to fig. 3 and 4, the pressing plate 73 covers the base 71 and forms an accommodating space 7a with the base 71.

Referring to fig. 5, the base 71 includes a bottom plate 712, and a first side plate 713 and a second side plate 714 disposed on opposite sides of the bottom plate 712. Opposite ends of the pressing plate 73 are connected to the first side plate 713 and the second side plate 714, respectively. The first portion 712a of the bottom plate 712, the first side plate 713, the second side plate 714, and the pressing plate 73 surround to form the accommodating space 7 a. In other embodiments, the base 71 may include only the bottom plate 712, and the first side plate 713 and the second side plate 714 are disposed on the pressing plate 73; alternatively, the base 71 includes a bottom plate 712 and a first side plate 713, and the second side plate 714 is provided on the pressing plate 73; alternatively, the base 71 includes a bottom plate 712 and a second side plate 714, and the first side plate 713 is provided on the pressing plate 73.

Referring to fig. 6, the raised portion 72 is disposed in the accommodating space 7 a. The second end 32 of the first flexible circuit board 3 and the second end 42 of the second flexible circuit board 4 are both disposed in the receiving space 7a and are pressed between the base 71 and the raised portion 72, between the raised portion 72 and the pressing plate 73, or between two adjacent raised portions 72 when the number of the raised portions 72 is multiple.

Specifically, the number of the raised portions 72 is at least one. When the number of the raised portions 72 is one, the raised portions 72 are provided to the first portion 712a of the base 71. The second end 32 of the first flexible circuit board 3 and the second end 42 of the second flexible circuit board 4 are disposed on the raised portion 72, and the pressing plate 73 presses the second end 32 of the first flexible circuit board 3 and the second end 42 of the second flexible circuit board 4 when being fixed to the first side plate 713 and the second side plate 714, so that the conductive terminals on the second end 32 of the first flexible circuit board 3 are stably connected with the conductive terminals on the second end 42 of the second flexible circuit board 4.

The height of the second end 42 of the second flexible circuit board 4 is increased by the height of the pad part 72, so that the height of the first flexible circuit board 3 can be prevented from being too large, the bending radian of the first flexible circuit board 3 is reduced, and the service life of the first flexible circuit board 3 is prolonged.

In other embodiments, the number of the raised portions 72 is plural, the plurality of raised portions 72 are sequentially stacked and disposed in the receiving cavity, and the second end 42 of the second flexible circuit board 4 and the second end 32 of the first flexible circuit board 3 may be interposed between the raised portions 72 and the base 71, between adjacent raised portions 72, or between the raised portions 72 and the pressing plate 73. In this way, the height of the second end 42 of the second flexible circuit board 4 and the second end 32 of the first flexible circuit board 3 can be adjusted, and the circuit board assembly 10 can be applied to electronic components 2 with different heights.

It is understood that the connection between the raised portion 72 and the base 71, the connection between two adjacent raised portions 72, and the connection between the raised portion 72 and the pressing plate 73 include, but are not limited to, welding, snap connection, adhesive connection, screw connection, magnetic connection, and the like.

Referring to fig. 7, the electrical connection between the second end 32 of the first flexible circuit board 3 and the second end 42 of the second flexible circuit board 4 includes, but is not limited to, a board-to-board connection. Specifically, the second end 32 of the first flexible circuit board 3 is provided with a plurality of first latching portions (not shown), the second end 42 of the second flexible circuit board 4 is provided with a plurality of second latching portions 42a, and the first latching portions and the second latching portions 42a are engaged with each other, so that the conductive terminals of the first end 31 of the first flexible circuit board 3 are in close contact with and electrically connected to the conductive terminals of the second end 42 of the second flexible circuit board 4.

Referring to fig. 6, the raised portion 72 is detachably connected to the second end 42 of the second flexible circuit board 4, and the second end 32 of the first flexible circuit board 3 is detachably connected to the pressing plate 73, specifically, the raised portion 72 is supported below the second end 42 of the second flexible circuit board 4, the second end 32 of the first flexible circuit board 3 is engaged with the second end 42 of the second flexible circuit board 4, the pressing plate 73 is pressed to the second end 42 of the second flexible circuit board 4, the pressing plate 73 generates a downward pressure on the second end 42 of the second flexible circuit board 4, so that the second end 32 of the first flexible circuit board 3 and the second end 42 of the second flexible circuit board 4 are pressed between the raised portion 72 and the pressing plate 73 and are not loosened, and in addition, the conductive terminals of the second end 32 of the first flexible circuit board 3 and the conductive terminals of the second end 42 of the second flexible circuit board 4 are in close contact and electrically connected under the clamping force of the base 71 and the pressing plate 73.

The connection mode of the pressure plate 73 to the base 71 is welding, screwing, gluing, magnetic attraction, clamping and the like. The connection between the pressing plate 73 and the base 71 will be described in detail in the following embodiments.

Referring to fig. 4 and 5, at least one end of the pressing plate 73 is engaged with the base 71; and/or at least one end of the pressure plate 73 is in threaded connection with the base 71. In this embodiment, at least one end of the pressing plate 73 is connected to the base 71 in a snap-fit manner; at least one end of the pressing plate 73 is screwed with the base 71. Specifically, an end of the first side plate 713 of the base 71, which is away from the bottom plate 712, is provided with an outward-turned protruding portion 715, and an end of the pressing plate 73 is provided with a through hole 73a for receiving the protruding portion 715. The second side plate 714 of the base 71 is provided with an outwardly turned screw connection 714a at the end remote from the bottom. In the installation process, the extension part 715 is arranged in the through hole 73a, one end of the pressing plate 73 is limited by the extension part 715, and the other end of the pressing plate 73 is in threaded connection with the threaded connection part 714a, so that the pressing plate 73 is fixedly connected with the base 71, and the connection mode is firm and convenient to detach and install.

Referring to fig. 7, when the pressing plate 73 is screwed to the base 71, one of the pressing plate 73 and the base 71 is provided with a third positioning hole 716, and the other is provided with a second positioning post or a fourth positioning hole 12 adapted to the third positioning hole 716, so as to achieve fast alignment and screwing of the pressing plate 73 and the base 71.

In another embodiment, one end of the pressing plate 73 is engaged with the base 71, and the other end of the pressing plate 73 and the base 71 may be welded, glued, magnetically attracted, engaged, or the like. In other embodiments, one end of the pressing plate 73 is screwed with the base 71, and the pressing plate 73 and the other end of the base 71 can be welded, screwed, glued, magnetically attracted, etc.

Optionally, the base 71 is integrally formed with at least one of the raised portions 72; and/or the pressure plate 73 is integrally formed with at least one of the raised portions 72. Specifically, the base 71 may be integrally formed with the raised portion 72, such that the raised portion 72 is a protrusion protruding toward the Z-axis positive direction on the bottom plate 712. Through setting up base 71 and fill up high portion 72 integrated into one piece, can realize filling up the structure simplification of high portion 72, save the connection technology of base 71 and fill up high portion 72, simplify the manufacturing process who raises support 7. For example, the base 71 and the raised portion 72 of the lifting bracket 7 may be made into a Metal Injection Molding (MIM) component, so that the lifting bracket 7 may be integrated and have a simple structure, and compared with punch forming, the punch forming is not limited by the shape of the mold and the thickness of the punch, the structure of the lifting bracket 7 is more variable, and the base 71 and the raised portion 72 are not welded, so that the stability is better.

Optionally, referring to fig. 8 and 9, the raised portion 72 includes at least one support leg 721, at least one support arm 722 and a support plate 723. The number of legs 721 may be one, two, three, etc. The number of arms 722 is the same as the number of legs 721. The supporting legs 721 are fixedly connected to the base 71, wherein the fixing connection includes, but is not limited to, screwing, welding, clamping, gluing, magnetic attraction, and the like. The supporting plate 723 is opposite to the supporting leg 721 and is arranged at an interval, and the height of the supporting plate 723 relative to the supporting leg 721 is also the height of the raised part 72. The supporting plate 723 supports the second end 42 of the second flexible circuit board 4. The support arm 722 is connected between the support leg 721 and the support plate 723.

In the present embodiment, referring to fig. 8 and 9, the supporting legs 721 are welded to the base 71 to realize the fixed connection between the raised portion 72 and the base 71. The support plate 723 has a through hole 723 a. The through hole 723a is used to provide a welding window for welding the supporting leg 721 and the base 71. In other words, the through hole 723a is a laser welding window area. Further, the number of the support legs 721 is two, the two support legs 721 are arranged along the Y-axis direction, the number of the through holes 723a is two, each through hole 723a corresponds to one support leg 721, and the welding between the support leg 721 and the bottom plate 712 of the base 71 is realized through the through hole 723 a.

Referring to fig. 5, the bottom plate 712 of the base 71 includes a first portion 712a and a second portion 712b disposed adjacent to each other. The raised portion 72 is provided on the first portion 712 a. The second portion 712b is adjacent to the first end 41 of the second flexible circuit board 4 with respect to the first portion 712 a. The raised part 72 is bonded to the second end 42 of the second flexible circuit board 4 by a first bonding adhesive (not shown), and at least a part of the second flexible circuit board 4 is bonded to the second part 712b by a second bonding adhesive (not shown), so that the second flexible circuit board 4 is bonded to the lifting support 7, and the space occupied by the second flexible circuit board 4 is reduced; the bonding area between the second flexible circuit board 4 and the lifting support 7 is large, and the second flexible circuit board 4 is prevented from loosening or falling off under the action of external force.

Optionally, at least a portion of the raised portion 72 is made of a conductive material. Specifically, the raised portion 72 is made of a conductive material, and the entire raised portion 72 is made of a conductive material. The conductive portion of the raised pad 72 is grounded. The first adhesive glue is conductive glue. The second end 42 of the second flexible circuit board 4 is grounded through the first adhesive and the conductive part of the raised part 72, so that the raised part 72 not only has the function of raising the second end 42 of the second flexible circuit board 4, but also has the function of auxiliary grounding, the function of the raised part 72 is increased, and the grounding stability of the second flexible circuit board 4 is improved; and/or, at least part of base 71 is electrically conductive material, the conducting part ground of base 71, the second bonding glue is the conducting resin, second flexible circuit board 4 warp the second bonding glue, the conducting part ground of base 71, so realize that base 71 not only has the effect of supporting second flexible circuit board 4's second end 42, still has the effect of supplementary ground connection, increases base 71's function, and has improved the ground connection stability of second flexible circuit board 4.

The above is an illustration of the circuit board assembly 10. The embodiment of the present application also provides an implementation mode for standardizing the extending track in the extending process of the first flexible circuit board 3 and/or the second flexible circuit board 4 and reducing interference to other devices, for example, the battery 6.

Specifically, referring to fig. 10, the electronic device 100 further includes at least one position-locking member 521. The locking member 521 is used for locking the first flexible circuit board 3 and/or the second flexible circuit board 4. The position-locking member 521 may be integrally formed with the middle frame 52 or the rear cover 53, or the position-locking member 521 is fixedly connected to the middle frame 52 or the rear cover 53 through welding, screwing, clamping, magnetic attraction, adhesion, or the like. The position-locking member 521 is an insulating member, and the position-locking member 521 can be in a shape of C, L, ring, etc. The number of the blocking parts 521 is multiple, and the plurality of blocking parts 521 limit the extending track of the first flexible circuit board 3 and/or the second flexible circuit board 4, so that the extending track of the first flexible circuit board 3 and/or the second flexible circuit board 4 can be rounded, and the interference of the first flexible circuit board 3 and/or the second flexible circuit board 4 to other devices can be reduced.

Referring to fig. 11, the middle frame 52 and/or the rear cover 53 are provided with a locking groove 522. For example, the two end openings of the locking groove 522 are provided on the inner wall of the middle frame 52, and the middle portion of the locking groove 522 is provided through the middle frame 52. The portion between the two ends of the first flexible circuit board 3 and/or the second flexible circuit board 4 is clamped in the clamping groove 522, so that the flexible circuit boards are arranged along the inner wall of the middle frame 52. The engaging slot 522 can be formed during the forming process of the middle frame 52, so that the additional engaging member 521 is not required, and the engaging member 521 is connected to the inner wall of the middle frame 52. The middle frame 52 can be used as the housing assembly 5 and can also integrate the extending tracks of the first flexible circuit board 3 and/or the second flexible circuit board 4, so that the functions of the middle frame 52 are increased, and the integration level and the integrated design of the device are improved.

In one embodiment, the electronic device 100 is a smart watch, and the electronic component 2 is a heart rate detector disposed on the smart watch. The heart rate detector may detect by ppg (photoplethysmogram) technique used for photoplethysmography. The PPG technology used in photoplethysmography is that an optical heart rate sensor is used, light with specific color and wavelength is emitted by a light emitting LED on the sensor to enter the epidermis skin of a specific part of a human body, and then corresponding reflected light or incident light is received by a photosensitive sensor to achieve the purpose of detecting pulse signals. The heart rate detector is close to the skin, so the heart rate detector and the circuit board 1 have a height difference in the thickness direction.

The flexible circuit board of intelligence wrist-watch that this application provided (including first flexible circuit board 3 and second flexible circuit board 4) connection structure design is connected through first flexible circuit board 3 and second flexible circuit board 4 between circuit board 1 and the rhythm of the heart detector, and 4 one ends hot-pressing of second flexible circuit board weld on circuit board 1, and the other end passes through the board and is connected board cassette and first flexible circuit board 3. In addition, the second flexible circuit board 4 is lifted by the lifting support 7 in an innovative design, the length of the second flexible circuit board 4 is effectively shortened, the stable and reliable degree of connection between the second flexible circuit board 4 and the first flexible circuit board 3 is enhanced, the length of the flexible circuit board between the electronic element 2 and the circuit board 1 is shortened, the production yield is high, and the cost is low.

Through increasing second flexible circuit board 4 between electronic component 2 and circuit board 1, the one end of second flexible circuit board 4 is being raised support 7 through electrically conductive sticky subsides to through the board to board cassette, first flexible circuit board 3 and electronic component 2 communication, raise support 7 through raising the board and raise the board to the board cassette, first flexible circuit board 3 is connected and is compressed tightly through the clamp plate 73 of raising support 7 behind the board to the board cassette. The other end of the second flexible circuit board 4 is communicated with the circuit board 1 through thermocompression bonding so as to save Z-direction space; the Z-direction connecting distance of the flexible circuit board is increased by raising the support 7 at the end of the electronic element 2, so that the limitation of the space structure of the electronic element 2 and the circuit board 1 is small, or the relative position of the circuit board 1 and the electronic element 2 is not limited by the structure, meanwhile, the length of a single flexible circuit board is shortened, and the connecting effect of the first flexible circuit board 3 and the second flexible circuit board 4 is more stable and reliable.

The second flexible circuit board 4 is fixed on the lifting support 7 through two conductive back adhesives, the height of the second flexible circuit board 4 is raised in a limited space, the connection distance of the first flexible circuit board 3 is reduced, the board is placed on the plane of the lifting support 7 to the board clamping seat, and the structure is stable and reliable.

One side of the base 71 is fixed with the circuit board 1 through screws, the other side of the base 71 is locked with the pressing plate 73 and the middle frame 52 through screws, and positioning columns are arranged near the screws to assist in positioning during assembly; the extension part 715 on the base 71 is a hook and is matched and fixed with the corresponding position of the middle frame 52, so that the lifting support 7 and the circuit board 1 are stably and reliably fixed, the connection position of the board to the board clamping seat is stable and reliable, the connection stability between the circuit board 1 and the electronic element 2 is improved, the assembly yield is high, the yield of the flexible circuit board is high, and the cost is reduced; the connection between first flexible circuit board 3 and the second flexible circuit board 4 is more reliable and more stable, and first flexible circuit board 3, second flexible circuit board 4 and raise support 7 whole fixed reliable and stable, and the durability is very strong.

Further, the first flexible circuit board 3 or the second flexible circuit board 4 is embedded into the middle frame 52 through the card slot 522 or other methods to fix and position the first flexible circuit board 3 or the second flexible circuit board 4, so that the connection is more reliable, and the assembly yield and the modular design of components are improved.

The foregoing is some embodiments of the present application. It should be noted that. As would be apparent to one of ordinary skill in the art. Without departing from the principles of the present application. Several improvements and refinements can also be made. Such modifications and refinements are also considered to be within the scope of the present application.

Claims

1. A circuit board assembly, comprising:

a circuit board;

2. The circuit board assembly of claim 1, wherein the second end of the second flexible circuit board is disposed between the electronic component and the circuit board, in the thickness direction, in a plane of the electronic component, or on a side of the electronic component facing away from the circuit board.

3. The circuit board assembly of claim 1, further comprising a lifting bracket disposed on or adjacent to the circuit board, the lifting bracket securing the second end of the second flexible circuit board to lift the second end of the second flexible circuit board.

4. The circuit board assembly of claim 3, wherein the elevated support comprises a base, at least one raised portion, and a pressure plate;

the base is fixedly connected with the circuit board, the pressing plate covers the base and is connected with the base in a surrounding mode to form an accommodating space, the heightening portions are arranged in the accommodating space, the second end of the first flexible circuit board and the second end of the second flexible circuit board are arranged in the accommodating space and are pressed between the base and the heightening portions, between the heightening portions and the pressing plate or between two adjacent heightening portions when the number of the heightening portions is multiple.

5. The circuit board assembly of claim 4, wherein at least one end of the pressure plate is snap-fit to the base; and/or at least one end of the pressure plate is in threaded connection with the base.

6. The circuit board assembly of claim 4, wherein the base is integrally formed with at least one of the raised portions; and/or the pressing plate and at least one heightening part are integrally formed.

7. The circuit board assembly of claim 4, wherein the raised portion comprises at least one leg fixedly connected to the base, at least one arm spaced apart from the leg, and a support plate supporting the second end of the second flexible circuit board, the arm being connected between the leg and the support plate.

8. The circuit board assembly of claim 7, wherein the legs are soldered to the base, and the support plate has through holes for providing solder windows for soldering the legs to the base.

9. The circuit board assembly of claim 4, wherein the base includes a first portion and a second portion disposed adjacent to each other, the second portion being adjacent to the first end of the second flexible circuit board relative to the first portion, the raised portion being disposed on the first portion, the raised portion being bonded to the second end of the second flexible circuit board by a first bonding adhesive, and at least a portion of the second flexible circuit board being bonded to the second portion by a second bonding adhesive.

10. The circuit board assembly of claim 9, wherein at least a portion of the raised portion is made of a conductive material, the conductive portion of the raised portion is grounded, the first adhesive is a conductive adhesive, and the second end of the second flexible circuit board is grounded through the first adhesive and the conductive portion of the raised portion; and/or, at least part of the base is made of a conductive material, the conductive part of the base is grounded, the second adhesive glue is conductive glue, and the second flexible circuit board is grounded through the second adhesive glue and the conductive part of the base.

11. The circuit board assembly of any one of claims 1-10, wherein the first end of the second flexible circuit board is thermocompression bonded to the circuit board.

12. The circuit board assembly of any one of claims 1-10, wherein the electronic component comprises at least one of a flash, a camera, a receiver, an antenna module, a fingerprint recognition module, a face recognition module, a proximity sensor, an ambient light sensor, a blood oxygen detection sensor, a heart rate detection sensor, and a blood pressure detection sensor.

13. An electronic device comprising the circuit board assembly according to any one of claims 1 to 12.

14. The electronic device of claim 13, further comprising a housing assembly and a battery, wherein the housing assembly comprises a display screen, a middle frame and a back cover, the display screen and the back cover are opposite and spaced apart, the middle frame is enclosed between the display screen and the back cover, the electronic component is disposed on the back cover, the circuit board is disposed between the display screen and the back cover, and the battery is disposed between the circuit board and the back cover.

15. The electronic device according to claim 14, wherein the middle frame and/or the rear cover is provided with a card slot, and a portion between both ends of the first flexible circuit board and/or the second flexible circuit board is/are clamped in the card slot.