CN111864431B - Electronic devices and their circuit board assemblies - Google Patents

Abstract

The present application relates to an electronic device and a circuit board assembly thereof. The circuit board assembly includes a first circuit board, a second circuit board, and electrical connectors. The first circuit board includes a first surface and a second surface opposite to each other, the first surface includes a first partial surface and a second partial surface connected to the first partial surface, and the second partial surface is curved relative to the first partial surface toward the second surface, so as to A plug-in space is formed on the first surface; an electrical contact area is formed at the connection of the first partial surface and the second partial surface. The electrical connecting piece has a contact portion, and the contact portion is at least partially accommodated in the insertion space; the electrical connecting piece is an electrical conductor, and the electrical connecting piece is in contact with the electrical contact area to be electrically connected with the first circuit board. The second circuit board is connected to the electrical connector and is electrically connected to the first circuit board through the electrical connector. The internal space utilization rate of the above electronic device is relatively high, which is beneficial to the miniaturization design of the electronic device.

Description

Electronic devices and their circuit board assemblies

technical field

The present application relates to the technical field of electronic devices, and in particular, to an electronic device and a circuit board assembly thereof.

Background technique

With the continuous development of electronic technology, electronic devices such as smart phones or tablet computers have become commonly used electronic devices by users. At present, electronic devices with functional modules such as cameras and structured light modules are becoming more and more common. Cameras enable electronic devices to take pictures and take pictures while having a call function, thus greatly enriching and expanding the use functions of electronic devices. It adds a lot of fun to people's lives, and the structured light module makes the use of electronic devices safer because of its superior image capture capability.

Such as the above-mentioned functional modules, in order to improve the performance diversity of the electronic device, more and more functional modules are built into the electronic device. Each functional module needs to be electrically connected to the mainboard of the electronic device. Usually, the electrical connection between the control circuit of the functional module and the mainboard is achieved through a board-to-board connector. Board-to-board connectors are widely used in circuit board connections inside electronic devices because they form a modular plug-in structure and can achieve fast and stable electrical connections. With more and more electronic devices inside electronic devices, the number of board-to-board connectors is also increasing, and the board-to-board connectors need to occupy a large space on the main board when they are used. Too much space is occupied by the board-to-board connector, which makes the space utilization rate of the electronic device low, which is not conducive to the miniaturization of the electronic device.

SUMMARY OF THE INVENTION

Embodiments of the present application provide an electronic device and a circuit board assembly thereof.

In a first aspect, embodiments of the present application provide a circuit board assembly, including a first circuit board, a second circuit board, and an electrical connector. The first circuit board includes a first surface and a second surface opposite to each other, the first surface includes a first partial surface and a second partial surface connected to the first partial surface, and the second partial surface is curved relative to the first partial surface toward the second surface, so as to A plug-in space is formed on the first surface; an electrical contact area is formed at the junction of the first partial surface and the second partial surface. The electrical connecting piece has a contact portion, and the contact portion is at least partially accommodated in the insertion space; the electrical connecting piece is an electrical conductor, and the electrical connecting piece is in contact with the electrical contact area to be electrically connected with the first circuit board. The second circuit board is connected to the electrical connector, and is electrically connected to the first circuit board through the electrical connector.

Second Aspect An embodiment of the present application further provides an electronic device, including a casing and the above-mentioned circuit board assembly, wherein the circuit board assembly is disposed in the casing.

In the electronic device provided by the embodiment of the present application, the electrical connection between the first circuit board and the second circuit board is realized by the electrical connector, the traditional board-to-board connector is omitted, and the gap between the two circuit boards can be reduced. The space occupied by the connection structure is conducive to freeing up more installation space for the electronic components of the electronic device. Therefore, the utilization rate of the internal space of the electronic device is high, which is conducive to the miniaturization design of the electronic device.

Further, a plug space is provided on the first circuit board based on the curved structure of the second partial surface relative to the first partial surface, and the contact portion of the electrical connector is at least partially accommodated in the plug space to form an electrical connection. The plug-in structure makes the electrical connection between the first circuit board and the second circuit board more reliable and not easy to loosen.

Further, the connection between the first partial surface and the second partial surface is at least the intersection line between the surfaces, so that the electrical contact area is at least a surface-to-surface intersection line contact area, and the electrical connector is at least partially accommodated in the plug-in connection. When spaced, it is in contact with at least a linear electrical contact area, so that the contact between the electrical connector and the first circuit board is at least a linear contact, the contact area between the two is relatively large, and the contact resistance is relatively low. The electrical connector can pass a relatively larger current, so as to meet the requirement of high current connection between the first circuit board or/and the second circuit board.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. Obviously, the accompanying drawings in the following description are only some implementations of the present application, which are common in the art. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a circuit board assembly provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of a connection structure of a circuit board assembly provided by an embodiment of the present application.

FIG. 3 is a schematic diagram of another connection structure of the circuit board assembly provided by the embodiment of the present application.

FIG. 4 is a schematic diagram of another connection structure of the circuit board assembly provided by the embodiment of the present application.

FIG. 5 is a schematic diagram of still another connection structure of the circuit board assembly provided by the embodiment of the present application.

FIG. 6 is a schematic diagram of another connection structure of the circuit board assembly provided by the embodiment of the present application.

7 is a schematic perspective cross-sectional view of an electrical connector of a circuit board assembly provided by an embodiment of the present application.

FIG. 8 is a schematic orthographic view of the electrical connector shown in FIG. 4 .

9 is a schematic perspective cross-sectional view of an electrical connector of a circuit board assembly provided by another embodiment of the present application.

10 is a schematic perspective cross-sectional view of an electrical connector of a circuit board assembly provided by another embodiment of the present application.

FIG. 11 is a schematic perspective view of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of this application.

With the continuous development of electronic technology, electronic devices such as smart phones or tablet computers have become commonly used electronic devices by users. In order to improve the performance diversity of electronic devices, more and more functional modules are built into electronic devices, such as various camera modules, receiver modules, speaker modules, structured light modules, and the like. Each functional module needs to be electrically connected to the mainboard of the electronic device. Usually, the electrical connection between the control circuit of the functional module and the mainboard is achieved through a board-to-board connector. When the board-to-board connector is used, it needs to occupy a large space on the main board. Too much space is occupied by the board-to-board connector, which makes the space utilization rate of the electronic device low, which is not conducive to the miniaturization of the electronic device.

The more traditional connection between the circuit boards is realized by the welding structure, which can omit the bulky board-to-board connector, which is beneficial to the miniaturization of the electronic device. In addition, the electrical connection method of the welding structure can realize larger current transmission through the bonding wires and pads with larger contact area, which has obvious advantages. However, when the soldering structure realizes the connection between the circuit boards, in order to carry out the soldering process, it is necessary to reserve enough operation space around the pad to facilitate the operation of the soldering equipment. Although the volume of the welded structure is small, the process of forming the welded structure still requires a large operating space, and other electronic components should not be arranged in these operating spaces, which will also lead to a waste of space.

In view of this, how to use a small electrical connection structure to realize the electrical connection between the two circuit boards is an urgent problem to be solved. It can be known from the above-mentioned solution of realizing between circuit boards through a welding structure that the body structure of the board-to-board connector is improved to reduce its volume, and the layout position of the board-to-board connector on the circuit board is improved to consider the space occupied by the board-to-board connector. Influence, improving the soldering process of the soldering structure to reduce its operating space, trying to create other connection structures to realize the electrical connection between the two circuit boards, etc., these are all angles worth considering in solving the above problems.

In view of the above-mentioned problems, embodiments of the present application provide a circuit board assembly and an electronic device having the circuit board assembly. The circuit board assembly includes a first circuit board, a second circuit board, and electrical connectors connected therebetween. The first circuit board includes a first surface and a second surface opposite to each other, the first surface includes a first partial surface and a second partial surface connected to the first partial surface, and the second partial surface is curved relative to the first partial surface toward the second surface, so as to A plug-in space is formed on the first surface; an electrical contact area is formed at the junction of the first partial surface and the second partial surface. The electrical connecting piece has a contact portion, and the contact portion is at least partially accommodated in the insertion space; the electrical connecting piece is an electrical conductor, and the electrical connecting piece is in contact with the electrical contact area to be electrically connected with the first circuit board. The second circuit board is connected to the electrical connector and is electrically connected to the first circuit board through the electrical connector. The above-mentioned circuit board assembly realizes the electrical connection between the first circuit board and the second circuit board through the electrical connector, omits the traditional board-to-board connector, and can reduce the occupation of the connection structure between the two circuit boards. It is beneficial to free up more installation space for the electronic components of the electronic device, so the utilization rate of the internal space of the electronic device is high, which is conducive to the miniaturization design of the electronic device.

Further, a plug space is provided on the first circuit board based on the curved structure of the second partial surface relative to the first partial surface, and the contact portion of the electrical connector is at least partially accommodated in the plug space to form an electrical connection. The plug-in structure makes the electrical connection between the first circuit board and the second circuit board more reliable and not easy to loosen.

Further, the connection between the first partial surface and the second partial surface is at least the intersection line between the surfaces, so that the electrical contact area is at least a surface-to-surface intersection line contact area, and the electrical connector is at least partially accommodated in the plug-in connection. When spaced, it is in contact with at least a linear electrical contact area, so that the contact between the electrical connector and the first circuit board is at least a linear contact, the contact area between the two is relatively large, and the contact resistance is relatively low. The electrical connector can pass a relatively larger current, so as to meet the requirement of high current connection between the first circuit board or/and the second circuit board.

As used in the specification and claims, certain terms are used to refer to particular components. It should be understood by those skilled in the art that hardware manufacturers may refer to the same component by different nouns. The description and claims do not take the difference in name as a way to distinguish components, but take the difference in function of the components as a criterion for distinguishing. As mentioned in the entire description and claims, "including" is an open-ended term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve the problem within a certain error range Technical problems, basically achieve technical results.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Referring to FIG. 1 , an embodiment of the present application provides a circuit board assembly 100 . The circuit board assembly 100 can be applied to an intelligent electronic device, for example, can be used as a control main board and a sub-circuit board of the intelligent electronic device. In the embodiment of the present application, the circuit board assembly 100 includes a first circuit board 10, a second circuit board 30, and an electrical connector 50 connected therebetween.

Referring to FIG. 2 , the first circuit board 10 includes a first surface 14 and a second surface 16 that face away from each other, and the first surface 14 and the second surface 16 respectively form the appearance surface structures of two sides of the first circuit board 10 . The first surface 14 includes a first partial surface 141 and a second partial surface 143 connected to the first partial surface 141 . The second partial surface 143 is bent toward the second surface 16 relative to the first partial surface 141 to form a plug space 12 on the first surface 14 for partially accommodating the electrical connector 50 . An electrical contact region 145 is formed at the junction of the first partial surface 141 and the second partial surface 143 . The electrical connector 50 has a contact portion 56 that is at least partially accommodated in the insertion space 12 . The electrical connector 50 is an electrical conductor, and the electrical connector 50 is in contact with the electrical contact area 145 to be electrically connected to the first circuit board 10 .

In the above-mentioned circuit board assembly 100, the second circuit board 30 is connected to the electrical connector 50, and is electrically connected to the first circuit board 10 through the electrical connector 50, so the traditional board-to-board connector is omitted, which can reduce the The space occupied by the connection structure between the first circuit board 10 and the second circuit board 30 is small, which is beneficial to free up more installation space for the electronic components of the electronic device 200, so the utilization rate of the internal space of the electronic device 200 is high, It is beneficial to the miniaturized design of the electronic device 200 . Further, the connection between the first partial surface 141 and the second partial surface 143 is at least the intersection line between the surfaces, so that the electrical contact area 145 is at least a surface-to-surface intersection line contact area, and the electrical connection member 50 is at least partially accommodated. When placed in the insertion space 12, it is in contact with the at least linear electrical contact area 145, so that the contact between the electrical connector 50 and the first circuit board 10 is at least a linear contact, and the contact area between the two is relatively small. Large, relatively low contact resistance, so that the electrical connector 50 can pass a relatively large current to meet the requirements of high current connection between the first circuit board 10 or/and the second circuit board 30 .

The first circuit board 10 may be a printed circuit board, which serves as a control motherboard of the electronic device 200 and is mainly used to control the operation of various electronic components of the electronic device 200 . In some embodiments, the first circuit board 10 may be a single-layer printed circuit board, which is also called "single-sided", that is, the parts are concentrated on one side and the wires are The printed circuit board concentrated on its other side.

In this embodiment, the first circuit board 10 is a double-sided board, wherein the double-sided board is a printed circuit board with conductive lines distributed on both sides. Specifically, the first surface 14 and the second surface 16 of the first circuit board 10 are distributed with a plurality of conductive lines (not shown in the figure), and the first circuit board 10 is further provided with a guide hole 101 , and the guide hole 101 penetrates the first surface 14 and the second surface 16 . The conductive hole 101 may be spaced apart from the plug-in space 12 to prevent the conductive hole 101 from damaging the electrical contact structure between the electrical connector 50 and the first circuit board 10 . In other embodiments, the guide hole 101 can also be directly communicated with the insertion space 12, that is, the hole wall of the guide hole 101 can be connected to the second partial surface 143, and the insertion space 12 and the guide hole 101 can pass through the first Opposite sides of a circuit board 10 , so that when the electrical connector 50 is in electrical contact with the first circuit board 10 , it can be electrically connected to the second surface 16 through the second partial surface 14 and the hole wall of the via hole 101 The conductive circuit can simplify the wiring structure of the first circuit board 10, thereby reducing the manufacturing cost.

Further, a conductive medium (such as metal, etc., not shown in the figure) may be provided in the via hole 101 , so that the conductive line on the first surface 14 can pass through the conductive medium in the via hole 101 and the conductive line on the second surface 16 For electrical connection, the conductive medium may be a metal material coated on the inner wall of the via hole or filled in the via hole. By setting the first circuit board 10 as a double-sided board, the wiring area is relatively larger, and a more complex circuit structure can be prepared, which is beneficial to reduce the overall volume of the circuit board assembly 100 .

In other embodiments, the first circuit board 10 may also be a multilayer printed circuit board, which is also referred to as a "multilayer board". At this time, the first circuit board 10 may include one or more single-sided boards or/and one or more double-sided boards, and the first circuit board 10 with a multi-layer structure is formed by stacking a plurality of printed circuit boards in sequence. An electrical insulating layer may be provided between two adjacent circuit boards. In some specific embodiments, the first circuit board 10 may be a 4-layer, 6-layer, 8-layer, 10-layer or even more layer printed circuit board. By setting the first circuit board 10 as a multi-layer printed circuit board, the wiring area is relatively larger, and a more complex circuit structure can be prepared, which is beneficial to reduce the overall volume of the circuit board assembly 100 .

In the present embodiment, the insertion space 12 formed on the first surface 14 is generally a concave structure provided on the first surface 14 , for example, it may be a hole structure or a groove structure or the like. Specifically, the insertion space 12 is formed depending on the curved structure of the second partial surface 143 relative to the first partial surface 141 . In this embodiment, the first partial surface 141 is substantially flat, and the curved structure of the second partial surface 143 relative to the first partial surface 141 toward the second surface 16 can be achieved by making the second partial surface 143 and the first partial surface 141 The bending structure that forms a geometric angle between them is realized, for example, an acute angle, an obtuse angle or a right angle is formed between the two. In other embodiments, the curved structure of the second partial surface 143 relative to the first partial surface 141 toward the second surface 16 may be achieved by means of a curved connecting structure therebetween. For example, the second partial surface 143 is opposite to the second surface 16. Since the first partial surface 141 has a structure such as a curved surface or an arc surface, there is no need to have a clear angle between the two, but the plug space 12 is presented as a hole structure on the first surface 14 by means of the structure of the second partial surface 143 . , a groove structure or a concave structure to facilitate receiving the electrical connector 50 .

In the embodiment of the present application, the shape of the second partial surface 143 is not limited, and its shape is consistent with or matched with the shape of the contact portion 56 of the electrical connector 50 , so as to allow the contact portion 56 and the surface of the second partial surface 143 contact to achieve electrical connection. For example, the second partial surface 143 can be an inner quadrangular prism surface so that the insertion space 12 is a square hole, the second partial surface 143 can be an inner cylindrical surface, the insertion space 12 can be a circular hole, and the second partial surface 143 can be an inner ellipse The cylindrical surface makes the insertion space 12 an elliptical hole; or, by designing the surface shape of the second partial surface 143 , the insertion space 12 is formed into a strip-shaped groove, a wave-shaped groove, an irregular groove and the like.

In the embodiment shown in FIG. 2 , the second partial surface 143 is roughly an inner cylindrical surface (such as an inner cylindrical surface, an inner elliptical cylindrical surface, an inner prismatic surface, etc.), and its two ends are respectively connected to the first partial surface 141 and the second surface. 16 is connected, so that the insertion space 12 has a through-hole structure passing through opposite sides of the first circuit board 10 . In this way, the requirements on the processing accuracy of the first circuit board 10 are relatively low, so that the processing cost of the first circuit board 10 is relatively low. At this time, the second partial surface 143 is substantially perpendicular to the first partial surface 141 , so that the electrical contact area 145 formed between the second partial surface 143 and the first partial surface 141 is a linear contact area. When the contact portion 56 of the electrical connector 50 is accommodated in the insertion space 12, it contacts with the linear electrical contact area 145, the contact area between the two is relatively large, and the contact resistance is relatively low, so that the electrical connection is made. The component 50 can pass a relatively larger current to meet the requirements of high current connection between the first circuit board 10 or/and the second circuit board 30 .

Referring to FIG. 3 , in some embodiments, the second partial surface 143 may be provided with a conductive medium layer 121 . It should be understood that the conductive medium layer 121 covers the second partial surface 143 and also covers the second partial surface 143 At the connection point of the first partial surface 141 , that is, covering the electrical contact area 145 , so as to facilitate the electrical connection between the first circuit board 10 and the electrical connector 50 . The conductive medium layer 121 may be a metal plating layer or a metal conductive coating. The conductive medium layer 121 may include any one or a combination of the following metal materials: gold, silver, copper, zinc, and the like. By arranging the conductive medium layer 121 on the second partial surface 143, the second partial surface can be protected from scratches and damage, and an appropriate material is selected as the conductive medium, which is beneficial to reduce the resistance of electrical connection and improve the utilization of electric energy Rate.

Referring to FIG. 4 , in some embodiments, the conductive medium layer 121 may include a copper plating layer 1211 and a gold plating layer 1213 , the copper plating layer 1211 is directly attached to the second partial surface 143 , and the gold plating layer 1213 covers the surface of the copper plating layer 1211 and is used for It is in direct contact with the electrical connector 50 to achieve electrical connection. In this embodiment, using the copper plating layer 1211 as a part of the conductive medium 121 can make the resistance of the conductive medium 121 relatively small, which is beneficial to improve the utilization rate of electric energy. Covering the surface of the copper plating layer 1211 with the gold plating layer 1213 can prevent the copper plating layer 1211 from being damaged by corrosion, which is beneficial to prolong the life of the first circuit board 10 . In other embodiments, the conductive medium layer 121 may include at least one of a copper plating layer 1211 and a gold plating layer 1213, and may also include other metal plating layers for directly contacting the electrical connector 50 to achieve electrical connection.

Referring to FIG. 5 , in other embodiments, the second partial surface 143 may be recessed relative to the first partial surface 141 but not connected to the second surface 16 , so that the insertion space 12 exhibits a structure that is not recessed relative to the first surface 14 , which The second surface 16 is not penetrated, so the insertion space 12 can be understood as a groove or a blind hole formed in the first surface 14 . When the contact portion 56 of the electrical connector 50 is accommodated in the insertion space 12, it contacts with the linear electrical contact area 145, and at the same time, the contact portion 56 can also contact other areas of the second partial surface 143, for example, When the plug space 12 has a blind hole structure, and a part of the second partial surface 143 is used as the bottom wall of the blind hole structure, the contact portion 56 can also be in contact with the bottom wall, further increasing the size of the electrical connector 50 and the second portion Therefore, the contact area between the two surfaces is relatively large and the contact resistance is relatively low, so that the electrical connector 50 can pass a relatively large current to meet the requirements of the first circuit board 10 or/and the second circuit board. The need for high current connections between circuit boards 30 .

Referring to FIG. 6 , in other embodiments, the second partial surface 143 may have a curved curved structure relative to the first partial surface 141 , and the shape of the second partial surface 143 is approximately the same as the surface structure of the contact portion 56 of the electrical connector 50 . The same or adapted, when the contact portion 56 of the electrical connector 50 is accommodated in the insertion space 12 , it contacts with the linear electrical contact area 145 , and at the same time, the contact portion 56 may also be in contact with the second partial surface 143 . Other areas are contacted to form surface contact, which further increases the contact area between the electrical connector 50 and the second partial surface 143 . Therefore, the contact area between the two is relatively large and the contact resistance is relatively low, making the electrical connector 50 relatively low. A relatively larger current can be used to meet the requirement of high current connection between the first circuit board 10 or/and the second circuit board 30 .

In this embodiment, the second circuit board 30 is a flexible circuit board. In other embodiments, the second circuit board 30 may also be a printed circuit board, such as a single-layer board, a double-layer board, a multi-layer board, etc., which is not limited in this application.

In this embodiment, the electrical connector 50 is formed by bending a metal sheet, so it can be called an elastic sheet structure with a certain elastic deformation capability, so that the contact portion 56 can be elastically deformed when it is inserted into the insertion space 12 . The firmness of the combination between the two is improved, and the electrical contact area is increased through elastic deformation and extrusion, so that the electrical connection between the first circuit board 10 and the second circuit board 30 is more stable and reliable. In this embodiment, the electrical connector 50 is made by bending a copper sheet, and its surface may be provided with a gold plating layer to protect the electrical connector 50 from corrosion damage. In other embodiments, the electrical connector 50 may be bent from other metals such as aluminum sheets.

Please refer to FIG. 7 . FIG. 7 is a schematic three-dimensional cross-sectional view of the electrical connector 50 provided in an embodiment of the present application. In this embodiment, the electrical connector 50 includes a fixing portion 52 , a connecting portion 54 and a contact portion 56 . The fixing part 52 is connected to the second circuit board 30 , and the connecting part 54 is connected between the fixing part 52 and the contact part 56 . In this application, terms, "connected", "fixed" and other terms should be construed broadly unless otherwise expressly specified or limited. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations. It should be understood that, in the specification of this application, the structure names of "fixed part", "connection part" and "contact part" are only for convenience of description, and these names should not limit the structure of the electrical connector 50, for example, " There may be no obvious demarcation line between the "fixed part", "connection part" and "contact part" (for example, the electrical connector 50 is formed by bending a metal sheet as a whole), or the "fixed part", "connection part", "contact part" The "contacts" can be made of different materials. The following is the same for the names and descriptions of the various parts of the electrical connector 50 unless otherwise specified.

In this embodiment, the fixing portion 52 is substantially in the shape of a flat plate, and is fixed on the second circuit board 30. For example, the fixing portion 52 can be stacked on the second circuit board 30, so that the electrical connecting member 50 has a relatively firm strength. supporting structure. In other embodiments, one end or one side of the fixing portion 52 is connected to the edge of the second circuit board 30 , so that the electrical connector 50 and the second circuit board 30 are approximately in a parallel structure, which is beneficial to reduce the circuit board assembly 100 The dimension in the thickness direction is beneficial to the thin design of the electronic device 300 .

The connecting portion 54 is substantially in the shape of a curved sheet, which is used to generate elastic deformation, so as to generate elastic deformation when the contact portion 56 is inserted into the insertion space 12 so as to exert pressure on the contact portion 56 toward the insertion space 12 . The connecting part 54 has a surface 540 facing away from the fixing part 52 , and the surface 540 is used to form the contact part 56 , so that the contact part 56 protrudes with respect to the surface 540 .

Further, please refer to FIG. 8 , in this embodiment, the connecting portion 54 includes an elastic force arm 541 , a connecting force arm 543 and a support table 545 . The elastic force arm 541 is bent and connected between the connection force arm 543 and the fixing portion 52 , and the connection force arm 543 is connected between the elastic force arm 541 and the support table 545 .

In this embodiment, there are two elastic arms 541 , which are a first elastic arm 5411 and a second elastic arm 5415 respectively. The first elastic force arm 5411 is generally bent in a "V" shape to facilitate elastic deformation. Specifically, the first elastic force arm 5411 includes a first arm 5412 and a second arm 5413 . One end of the first arm 5412 is connected to the fixing portion 52 , and the other end extends away from the fixing portion 52 , so that the included angle between the first arm 5412 and the fixing portion 52 is approximately an acute angle. The second arm 5413 is connected to the end of the first arm 5412 away from the fixing portion 52, and is bent and extended relative to the first arm 5412. The included angle between the second arm 5413 and the first arm 5412 is approximately an acute angle, so that the first elastic The moment arm 5411 is generally bent in a "V" shape. Wherein, the "included angle" in the description of the present application should be understood in a broad sense, for example, each arm is roughly in the shape of a sheet, and the "included angle" between the two should be understood as the roughly included angle between the planes where the sheet-like structure is located, The arc connection structure (if any) between the arms should not be taken into account. It should be understood that, in the specification of this application, the terms "first" and "second" are only used for description purposes, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

The second elastic force arm 5415 and the first elastic force arm 5411 are disposed opposite to each other, and the structures of the two are approximately symmetrical to the left and right. The second elastic force arm 5415 is generally bent in a "V" shape to facilitate elastic deformation. Specifically, the second elastic force arm 5415 includes a third arm 5416 and a fourth arm 5417 . One end of the third arm 5416 abuts against the fixing portion 52 , and the other end extends away from the fixing portion 52 , so that the included angle between the third arm 5416 and the fixing portion 52 is substantially an acute angle. The fourth arm 5417 is connected to the end of the third arm 5416 away from the fixing portion 52, and is bent and extended relative to the third arm 5416. The included angle between the fourth arm 5417 and the third arm 5416 is approximately an acute angle, so that the second elastic The moment arm 5415 is generally bent in a "V" shape.

Further, in order to enhance the reliability of the third arm 5416 abutting against the fixing portion 52 , the connecting portion 54 further includes a support arm 547 . The support arm 547 is connected to the end of the third arm 5416 close to the fixing portion 52, and is bent relative to the third arm 5416. The support arm 547 is approximately overlapped on the surface of the fixing portion 52, so that the third arm 5416 can be relatively stable. The supporting force prevents the third arm 5416 from disengaging from the fixing portion 52 when the connecting portion 541 is deformed.

In this embodiment, there are two connection arms 543 , which are the first connection arm 5431 and the second connection arm 5433 respectively. The first connecting force arm 5431 is substantially in the shape of a sheet, which is connected to an end of the second arm 5413 away from the first arm 5412 and is bent relative to the second arm 5413 . The second connecting force arm 5433 and the first connecting force arm 5431 are arranged at a distance from each other, and the structures of the two are approximately symmetrical to the left and right. The second connecting force arm 5433 is substantially in a sheet shape and is connected to the end of the fourth arm 5417 away from the third arm 5416 and is bent relative to the fourth arm 5417 .

The support table 545 is disposed on the side of the connection arm 543 away from the support arm 541 , and two ends of the support table 545 are respectively connected to the first connection arm 5431 and the second connection arm 5433 . The support stand 545 is used to support the contact portion 56 . The above-mentioned surface 540 of the connecting portion 54 is located on the side of the support table 545 away from the fixing portion 52 .

In the embodiment shown in FIGS. 7 and 8 , the contact portion 56 is a boss structure protruding from the surface 540 . Further, in order to reduce the resistance, the surface of the contact portion 56 may be provided with a copper plating layer and a gold plating layer, and the copper plating layer is located between the gold plating layer and the surface of the contact portion 56 .

In this embodiment, the contact portion 56 includes a first contact piece 561 and a second contact piece 563 . The first contact piece 561 is connected to the support base 545 , is bent relative to the support base 545 , and extends in a direction away from the fixing portion 52 . Further, the first contact piece 561 has an opposite first end 5611 and a second end 5613 , the first contact piece 561 is connected to the support table 545 through the first end 5611 , and the second end 5613 is away from the support table 545 . The second contact piece 563 is connected to the support base 545 , is bent relative to the support base 545 , and extends in a direction away from the fixing portion 52 . Further, the second contact piece 563 has an opposite third end 5631 and a fourth end 5633, the second contact piece 563 is connected to the support table 545 through the third end 5631, the fourth end 5633 is away from the support table 545, and the fourth end 5633 Connect with the second end 5613 of the first contact piece 561 . Therefore, the first end 5611 and the third end 5631 are relatively spaced apart, and the second end 5613 and the fourth end 5633 are connected to each other, so that the contact portion 56 has a substantially "V"-shaped boss structure, which is beneficial to improve the contact between the contact portion 56 and the fourth end 5633. The contact area between the plug spaces 12 . Further, in this embodiment, in order to adapt to the shape of the contact portion 56 , the insertion space 12 may be in the shape of a strip groove. Further, the insertion space 12 may be a strip-shaped groove with a "V"-shaped cross section. For example, the second partial surface 143 may include two surfaces connected to each other, and the two surfaces are arranged at an angle so that the second partial surface 143 can be formed at an angle. The cross-section of the surface 143 is substantially "V"-shaped. Therefore, when the contact portion 56 of the electrical connector 50 is accommodated in the insertion space 12, the contact portion 56 is substantially in the "V"-shaped boss structure and the linear While the electrical contact area 145 is in contact, the substantially “V”-shaped boss structure of the contact portion 56 can also form surface contact with the “V”-shaped surface of the second partial surface 143 , which further increases the size of the electrical connection member 50 and the second The contact area between the partial surfaces 143 is relatively large and the contact resistance is relatively low, so that the electrical connector 50 can pass a relatively large current to meet the requirements of the first circuit board 10 or/and the first circuit board 10 or/and the second circuit board. A high current connection between the two circuit boards 30 is required.

Referring to FIG. 9 , FIG. 9 shows a schematic three-dimensional cross-sectional view of an electrical connector 50 provided in another embodiment of the present application. In this embodiment, the contact portions 56 are substantially in the shape of a “V”-shaped boss strip, and the number of the contact portions 56 is multiple, and the multiple contact portions 56 are arranged in sequence and spaced apart. Correspondingly, the second partial surface 143 and its correspondingly formed insertion spaces 12 can also be multiple, and are strip-shaped recessed groove structures (such as the “V”-shaped strip-shaped grooves above), and multiple insertion spaces 12 corresponds to a plurality of contact portions 56 one-to-one, and the end of each contact portion 56 is accommodated in the corresponding insertion space 12 . By arranging a plurality of plug-in spaces 12 and a plurality of contact portions 56 for one-to-one correspondence, there are a plurality of contact portions (including a plurality of line contacts and a plurality of surface contacts) between the electrical connector 50 and the first circuit board 10 . A parallel relationship is formed between the contact parts. Assuming that each contact part can flow 1 unit current, the n contact parts can flow n units of current, so that the electrical connector 50 has a high overcurrent capability to meet the needs of Equipped with the functional module 250 that requires a larger current.

In other embodiments, the contact portion 56 may have a structure other than the “V” shape. As shown in FIG. 10 , the contact portion 56 may be a circular or spherical-like boss structure, and the number of the contact portion is multiple. 56 are arranged spaced apart from each other. Correspondingly, the second partial surface 143 and the correspondingly formed insertion spaces 12 may also be multiple, and the second partial surface 143 may be a spherical surface, and the insertion space 12 may correspondingly be a spherical concave hole structure. The connection space 12 corresponds to the plurality of contact portions 56 one-to-one, and the end of each contact portion 56 is accommodated in the corresponding insertion space 12 . When the contact portion 56 of the electrical connector 50 is accommodated in the insertion space 12 , the circular or spherical-like boss structure of the contact portion 56 contacts the linear electrical contact area 145 at the same time, the circular or spherical shape of the contact portion 56 The spherical-like boss structure can also form surface contact with the spherical surface of the second partial surface 143, which further increases the contact area between the electrical connector 50 and the second partial surface 143, so the contact area between the two is relatively small. Large, relatively low contact resistance, so that the electrical connector 50 can pass a relatively large current to meet the requirements of high current connection between the first circuit board 10 or/and the second circuit board 30 .

When assembling the circuit board assembly 100 provided by the embodiment of the present application, firstly, the prepared and connected second circuit board 30 and the electrical connector 50 are roughly aligned with the first circuit board 10, so that the contact portions 56 of the electrical connector 50 are approximately aligned with each other. Right in the plug space 12 . Then, pressure is applied to the electrical connection portion 50 to insert the contact portion 56 into the corresponding insertion space 12 . Therefore, the electrical connection between the first circuit board 10 and the second circuit board 30 can be quickly and conveniently realized, which is beneficial to improve the assembly efficiency and reduce the manufacturing cost.

To sum up, in the circuit board assembly provided by the embodiments of the present application, the electrical connection between the first circuit board and the second circuit board is realized through the electrical connector, the traditional board-to-board connector is omitted, and the number of two The space occupied by the connection structure between the circuit boards is conducive to freeing up more installation space for the electronic components of the electronic device, so the internal space utilization rate of the electronic device is high, which is conducive to the miniaturization design of the electronic device. Further, the connection between the first partial surface and the second partial surface is at least the intersection line between the surfaces, so that the electrical contact area is at least a surface-to-surface intersection line contact area, and the electrical connector is at least partially accommodated in the plug-in connection. When spaced, it is in contact with at least a linear electrical contact area, so that the contact between the electrical connector and the first circuit board is at least a linear contact, the contact area between the two is relatively large, and the contact resistance is relatively low. The electrical connector can pass a relatively larger current, so as to meet the requirement of high current connection between the first circuit board or/and the second circuit board.

Referring to FIG. 11 , based on the above-mentioned circuit board assembly 100 , an embodiment of the present application further provides an electronic device 200 . The electronic device 200 may be, but is not limited to, an electronic device such as a mobile phone, a tablet computer, and a smart watch. The electronic device 200 of the present embodiment will be described by taking a mobile phone as an example. It should be understood that, in the description of this specification, references to the terms "one embodiment," "some embodiments," "other embodiments," or "some examples" and the like are intended to be described in conjunction with the embodiment or example. The specific features, structures, materials, or characteristics of the present application are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

The electronic device 200 includes a casing 210 and any one of the above circuit board assemblies 100 . The circuit board assembly 100 is disposed in the casing 210 and is used to realize electrical connection between electronic components of the electronic device 200 . Wherein, the first circuit board 10 of the circuit board assembly 100 may be a printed circuit board, which serves as a control motherboard of the electronic device 200 , and the second circuit board 30 of the circuit board assembly 100 may be used as a functional circuit board for electronic components of the electronic device 200 . , which is used to realize the electrical connection between each electronic component and the main board, so as to allow the main board to control the operation of each electronic component of the electronic device 200 .

The electronic device 200 also includes a display screen 230 and a function module 250 disposed on the housing 210. The display screen 230 is used to display information such as images, text, and the like, and to provide a human-computer interaction interface with the user; the function module 250 is used to realize the electronic device. 200 functions (such as shooting, calling, etc.) modules.

In this embodiment, the display module 230 generally includes a display panel and a cover plate, and may also include a circuit for responding to a touch operation on the display panel, and the like. The display panel may be a liquid crystal display panel (Liquid Crystal Display, LCD), and in some embodiments, the display panel may be a touch display panel at the same time.

The functional module 250 is connected to the second circuit board 30 to be electrically connected to the first circuit board 30 through the second circuit board 30 and the electrical connector 50 . The second circuit board 30 may be a functional circuit board for the function module 250 to realize its functions, or may be a transition circuit board connected to the circuit board of the function module 250 . The functional module 250 may include any one or more of functional components such as a front-facing camera, a rear-facing camera, a flash, a receiver, a sensor, a speaker, a structured light module, a time-of-flight module, a fingerprint identification module, a key module, and the like, in order to realize the functions required by the electronic device 200 . In this specification, the function module 250 is described by taking a camera module as an example. In this embodiment of the present application, the number of second circuit boards 30 of the above-mentioned circuit board assembly 100 may be multiple, and the multiple second circuit boards 30 may be provided in a one-to-one correspondence with multiple functional components in the functional module 250 for use in The electrical connection between different functional components and the first circuit board 10 is realized. Specifically, the number of electrical connectors 50 and the number of second circuit boards 30 are the same as the number of functional components in the functional module 250 , and each second circuit board 30 is connected to one functional component.

Further, in other embodiments, the second circuit board 30 can also be used to connect the display screen 230 , for example, the second circuit board 30 can be a control circuit board of the display screen 230 , and is connected to the first display screen 230 through the electrical connector 50 . A circuit board 10 . From this perspective, the display screen 230 can also be understood as one of the above-mentioned functional modules 250 . Since the electrical connector 50 provided by the present application has a high overcurrent capability, it can undertake the task of electrical connection between the display screen 230 and the main board, thereby eliminating the need to use a traditional board-to-board connector to connect the display screen and the main board The structure of the electronic device 200 simplifies the internal structure and reduces the cost.

To sum up, in the electronic device provided by the embodiments of the present application, the electrical connection between the first circuit board and the second circuit board is realized by the electrical connector, the traditional board-to-board connector is omitted, and the two circuits can be reduced. The space occupied by the connection structure between the boards is conducive to freeing up more installation space for the electronic components of the electronic device, so the internal space utilization rate of the electronic device is high, which is conducive to the miniaturization design of the electronic device. Further, the connection between the first partial surface and the second partial surface is at least the intersection line between the surfaces, so that the electrical contact area is at least a surface-to-surface intersection line contact area, and the electrical connector is at least partially accommodated in the plug-in connection. When spaced, it is in contact with at least a linear electrical contact area, so that the contact between the electrical connector and the first circuit board is at least a linear contact, the contact area between the two is relatively large, and the contact resistance is relatively low. The electrical connector can pass a relatively larger current, so as to meet the requirement of high current connection between the first circuit board or/and the second circuit board.

As "electronic equipment", "communication terminal" (or simply "terminal") used in the embodiments of the present application include, but are not limited to, are configured to be connected via wired lines (eg, via the public switched telephone network (PSTN), digital Subscriber Line (DSL), digital cable, direct cable connection, and/or another data connection/network) and/or via (eg, for cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, A satellite network, an AM-FM broadcast transmitter, and/or another communication terminal's) wireless interface to receive/transmit communication signals. A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", "mobile terminal" and/or "electronic device". Examples of electronic devices include, but are not limited to, satellite or cellular telephones; Personal Communication System (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet access , a PDA with a web browser, memo pad, calendar, and/or a global positioning system (GPS) receiver; and conventional laptop and/or palm receivers or other electronic devices including radiotelephone transceivers.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (10)

1. A circuit board assembly, characterized in that, comprising: The first circuit board includes a first surface and a second surface opposite to each other, the first surface includes a first partial surface and a second partial surface connected to the first partial surface, and the second partial surface is opposite to the first partial surface. A part of the surface is bent toward the second surface to form a plug space on the first surface; a linear electrical contact area is formed at the connection between the first part surface and the second part surface; The electrical connector has a contact portion, the contact portion is at least partially accommodated in the insertion space; the electrical connector is an electrical conductor, and the contact portion is in contact with the electrical contact area to be in contact with the first circuit board electrical connections; and a second circuit board, connected to the electrical connector, and electrically connected to the first circuit board through the electrical connector; The electrical connector is formed by bending a metal sheet, the electrical connector includes a connecting part and a fixing part, the fixing part is arranged between the second circuit board and the connecting part, and the contact part is arranged on the a side of the connecting portion away from the fixing portion; The contact portion includes a first contact piece and a second contact piece, the first contact piece includes an opposite first end and a second end, and the first end is connected to the connection portion; the second contact piece It includes opposing third and fourth ends, the third end being connected to the connecting portion and spaced opposite the first end, and the second end being connected to the fourth end. 2 . The circuit board assembly according to claim 1 , wherein two sides of the second partial surface are respectively connected to the first partial surface and the second surface, so that the insertion space penetrates through the insertion space. 3 . A through hole structure is formed on opposite sides of the first circuit board. 3 . The circuit board assembly of claim 1 , wherein the second partial surface is provided with a copper plating layer. 4 . 4 . The circuit board assembly of claim 3 , wherein a side of the copper plating layer away from the second partial surface is provided with a gold plating layer. 5 . 5. The circuit board assembly of claim 1, wherein the connecting portion has a bent structure. 6 . The circuit board assembly of claim 5 , wherein the connecting portion includes a surface facing away from the fixing portion, and the contact portion is a boss structure protruding from the surface. 7 . 7 . The circuit board assembly of claim 6 , wherein there are a plurality of the contact portions, and the plurality of the contact portions are spaced apart from each other; the second partial surface and the insertion space are a plurality of 7 . , a plurality of the plug spaces and a plurality of the contact parts are provided in a one-to-one correspondence, and each of the contact parts is at least partially accommodated in the corresponding plug space. 8 . The circuit board assembly according to claim 1 , wherein the shape of the second partial surface is adapted to the shape of the contact portion so as to match the surface of the contact portion. 9 . contact. 9 . An electronic device, characterized by comprising a casing and the circuit board assembly according to any one of claims 1 to 8 , wherein the circuit board assembly is disposed in the casing. 10 . 10. The electronic device according to claim 9, wherein the first circuit board is a mainboard of the electronic device, the electronic device further comprises a function module, and the second circuit board is connected to the function module module; the functional module includes one or more of the following functional components: front camera, rear camera, flash, receiver, sensor, speaker, structured light module, time-of-flight module, fingerprint recognition module, key module The number of the electrical connectors and the number of the second circuit boards are the same as the number of functional components in the functional module, and each of the second circuit boards is correspondingly connected to one of the functional components .

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